JP3185886B2 - Die casting product counting method and die casting product counting device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial application field) The present invention relates to a method and an apparatus for automatically counting products manufactured by a die-casting machine. The present invention relates to a method and an apparatus for automatically discriminating products and non-products and automatically counting the number of manufactured products.

(Prior Art) Die casting machines are widely used for manufacturing aluminum die casting products and other various die casting products.

Before manufacturing a product using a die casting machine, so-called “test run” and “discard run” are performed as a preliminary stage.

In the test run, a die casting machine is operated to determine the operating conditions for continuous production of normal products, and a test operation is performed to obtain sufficient operating conditions for continuous product production. Will be In this test operation, for example, in the case of the two-stage injection, the critical speed of the plunger in a low-speed section for filling the sleeve with the molten metal so as to prevent the formation of a cavity in the die-cast product due to the entrainment of air is determined. By this test operation, predetermined continuous operation conditions such as the speed of the plunger in the low speed section, the timing of switching the plunger from low speed to high speed, the timing of pressure increase (pressure increase), and the magnitude of the pressure are determined.

After that, the dumping operation is performed. In this discarding operation, the die casting machine is operated to warm up the die casting machine at the time of starting or after stopping the die casting machine. The molten metal is introduced into the cavity of the die casting machine to bring the mold to a predetermined temperature state. An operation such as performing is performed.

When the dumping operation is completed, the continuous operation of the die casting machine is performed under the continuous normal operating conditions for manufacturing the original product.

In this normal operation, continuous operation is performed until the number of manufactured products reaches a predetermined number. Therefore, it is necessary to count whether or not the number of continuously manufactured products has reached a predetermined number.

Conventionally, as a method of counting the number of products, a counter and a changeover switch were provided, and after the discard operation was completed, the changeover switch was turned on manually to enable the counter to count.
A technique such as a method of advancing a counter for each injection is employed.

However, in the conventional method, first, in the operation of the die casting machine, the plunger speed, injection pressure,
Since the holding pressure and the like change dynamically with time and exhibit complicated transient response characteristics, the discrimination between the discard operation and the normal operation is complicated, and automatic discrimination has not been realized. For this reason, the operator determines the end of the discarding operation, turns on the changeover switch manually, and operates the counter so that the number of products can be counted in the normal operation.

Next, the counter is operated for each injection.
It is difficult to make an accurate automatic determination of injection, and an operator determines the end of one injection and inputs a signal to the counter.

As a result, despite the fact that the die-casting machine is automatically operated by the control device, the number of products is still only automated to the extent of semi-automation as described above, and labor savings associated with full automation have been sufficiently achieved. Have not encountered the problem.

(Problems to be Solved by the Invention) The present invention has a problem that the automatic counting of products is difficult due to the difficulty in automatically discriminating between the discard operation and the normal operation, and as a result, labor saving is insufficient. It solves the point.

Therefore, the present invention provides a die-casting system for accurately and automatically discriminating between a discarding operation and a normal operation, and also automatically and automatically discriminating one injection to accurately count the number of products manufactured by the die-casting machine. An object of the present invention is to provide a product counting method and a device thereof.

[Configuration of the invention]

(Means for Solving the Problems) As shown in FIG. 1, a die casting product counting method according to a first embodiment of the present invention includes an operation state determination condition setting step (step 01) and a comparison determination step (step 01). 02) and a product number counting step (step 03).

In the condition setting stage (step 01), as a normal operation of the die casting machine, at least one of a high-speed injection step and a pressure increase step is performed, and one injection of die-cast product production is normally performed in a normal operation state. It is set that at least the low-speed injection step, the high-speed injection step, the pressure-increasing step, and the pressure-holding step are sequentially performed as one-shot end determination conditions indicating that the step has been performed. In the comparison determination step (step 02), a reading of a speed sensor for detecting the speed of the plunger or the injection piston rod in the die casting machine and a reading of a pressure sensor for detecting the pressure applied to the plunger or the injection piston rod are performed. The die casting machine is in a normal operation state when at least one of the conditions matches the set normal operation determination condition, and the speed sensor reading and the pressure sensor reading are the 1st. When the low-speed injection step, the high-speed injection step, the pressure-increasing step, and the pressure-holding step, which are set as the shot end determination conditions, are sequentially performed, it is determined that one normal shot has been completed in the normal operation. Product counting stage (Step 03)
In the above, when the determination result in the determination step indicates the normal operation state of the die casting machine and indicates the end of one shot, the number of die cast products is counted.

Preferably, in the condition setting step (step 01), the value of the speed of the plunger or the injection piston rod in the high-speed injection step as the normal operation determination condition, and the plunger or the injection piston in the pressure increasing step At least one of the values of the pressure applied to the rod is set, and the value of the speed of the plunger or the injection piston rod in the low-speed injection step and the plan in the high-speed injection step are determined as the normal one-shot end determination condition. A value of the speed of the jar or the injection piston rod, a value of the pressure applied to the plunger or the injection piston rod in the pressure increasing step,
Further, a value of the pressure applied to the plunger or the injection piston rod in the pressure holding step is set.
In the determining step (step 02), a reading of a speed sensor for detecting a speed of the plunger or the injection piston rod, and a reading of a pressure sensor for detecting a pressure applied to the plunger or the injection piston rod; A set value of the speed of the plunger or the injection piston rod in the high-speed injection step in the normal operation determination condition set in the condition setting step, and
The die casting machine is usually used when it indicates that at least one of the high-speed injection step and the pressure increase step has been performed in comparison with a set value of the pressure applied to the plunger or the injection piston rod in the pressure increase step. The plunger or the plunger in the low-speed injection process as a normal one-shot end determination condition set in the condition setting step, wherein the reading of the speed sensor and the reading of the pressure sensor are determined to be in the operating state. A set value of the speed of the injection piston rod, a set value of the speed of the plunger or the injection piston rod in the high-speed injection step, a set value of the pressure applied to the plunger or the injection piston rod in the pressure increasing step, and The plunger or the injection piston rod in the pressure holding step When it indicates that the low-speed injection step, the high-speed injection step, the pressure-increasing step, and the pressure-holding step, which are set as the one-shot end determination condition in comparison with the set value of the applied pressure, are sequentially performed, the normal operation is normal. It is determined that one shot has ended.

As shown in FIG. 2, a die-casting product counting device according to a second embodiment of the present invention includes an operating state determination condition setting unit 3, a detection unit 1, a comparison determination unit 5, a product number counting unit 7, It is comprised including.

The operating state determination condition setting means 3 performs at least one of the high-speed injection step and the pressure increase step as a normal operation of the die casting machine, and normally performs one injection of die casting product production in the normal operation state. It is set that at least the low-speed injection step, the high-speed injection step, the pressure-increasing step, and the pressure-holding step are sequentially performed as one-shot end determination conditions indicating that the step has been performed. The detecting means 1
Comprises a speed sensor for detecting a speed of a plunger or an injection piston rod in the die casting machine, and a pressure sensor for detecting a pressure applied to the plunger or the injection piston rod. The comparison determination means 5 compares the reading of the speed sensor and the reading of the pressure sensor with the set normal operation determination condition to indicate that either the high-speed injection step or the pressure increasing step has been performed. When the die casting machine is in a normal operation state, and the reading of the speed sensor and the reading of the pressure sensor and the low-speed injection step, high-speed injection step, and pressure increase set as the set normal one-shot end determination conditions When the process and the pressure-holding process are sequentially performed, it is determined that one shot is normally completed in the normal operation. The product number counting means 7 counts the number of die cast products when the result of the determination by the determination means indicates the normal operation state of the die casting machine and indicates the end of the normal one shot.

Preferably, the condition setting means sets a value of the speed of the plunger or the injection piston rod as the high-speed injection step as the normal operation determination condition, and the plunger or the injection piston rod as the pressure increasing step. And the value of the pressure of the plunger or the injection piston rod in the low-speed injection step, the plunger or the injection piston in the high-speed injection step as the normal one-shot end determination condition. Set the value of the speed of the rod, the value of the pressure applied to the plunger or the injection piston rod in the pressure increasing step, and the value of the pressure applied to the plunger or the injection piston rod in the pressure holding step. . The determination means is configured to set the speed of the plunger or the injection piston rod in the high-speed injection process under the normal operation determination condition set by the condition sensor reading and the pressure sensor reading and the pressure sensor reading. The value, and when indicating that at least one of the high-speed injection step and the pressure increase step has been performed in comparison with a set value of the pressure applied to the plunger or the injection piston rod in the pressure increase step. It is determined that the die casting machine is in a normal operation state, and the reading of the speed sensor and the reading of the pressure sensor are performed in the low-speed injection step as a normal one-shot end determination condition set by the condition setting means. Setting the speed of the plunger or injection piston rod, Set value of the speed of the plunger or the injection piston rod in the pressure increasing step, set value of the pressure applied to the plunger or the injection piston rod in the pressure increasing step, and applied to the plunger or the injection piston rod in the pressure holding step. When it indicates that the set low-speed injection step, high-speed injection step, pressure-increasing step, and pressure-holding step are sequentially performed in comparison with the set value of the pressure, it is determined that one normal shot has been completed in the normal operation. .

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

First, with reference to FIG. 3, a general die-casting product counting method as an embodiment of the present invention will be described. In addition,
This die casting product counting method will be described in relation to the die casting machine product counting device of FIG.

Step 10 (S10) By the test operation, the continuous operation conditions for discriminating between the discard operation and the continuous operation, and the operation state determination conditions for the injection of the product 1 in the continuous operation are obtained. These operating conditions are:
It is determined according to the type of die casting machine, the product to be manufactured, and the like. These operating conditions are set by the operator from the operating condition setting means 3 in FIG. 2 to the discriminating means 5, and the discriminating means 5 stores the set operating conditions.

Step 20 (S20) In the operating state of the die casting machine, the detecting means 1 detects the operating state of the die casting machine and applies a detection signal to the determining means 5. This operation state includes both the discard operation and the normal operation.

Step 30 (S30) The determination means 5 receives the operation state detection signal of the die casting machine from the detection means 1 and
Is compared with the determination condition from (1) to determine whether or not they match. If they match, a match signal is output to the counting means 7.

Here, as described above, the operation state of the die casting machine is also detected from the detection means 1 and input to the discrimination means 5 even when the die casting machine is performing a discard operation.
However, in this case, since the operating state of the die casting machine does not match the normal operating condition from the operating condition setting means 3,
In the discard operation state, the above-described coincidence signal is not output.

In addition, as a discrimination between the discard operation and the normal operation, in the discard operation, the "high-speed operation switch" and the "pressure increase switch" of the plunger are not set to the on state from the die casting machine control device. Enter the status of these switches, and the status of these switches
When it becomes, it may be determined that the operation has been switched from the dumping operation to the normal operation.

Incidentally, in the normal operation mode after the determination condition is set by the operation condition setting means 3, there may be a case where the operation state of one injection does not match the set operation condition. Also in this case, no match signal is output. In this case, the determination means 5
Can output an alarm signal to notify that there is an abnormality in product manufacturing.

Step 40 (S40) The counting means 7 increments the count value corresponding to one product injection only when the coincidence signal is output from the discriminating means 5.

The count value of the counting means 7 is cleared when the operating condition is set by the operating condition setting means 3.

Further, when the count value corresponding to the number of products to be manufactured is set at the same timing as the above-mentioned clearing and reaches the count value corresponding to the number of products to be manufactured, the counting means 7 determines the reaching signal by the determination means 5 and It can be output to a control device of a die casting machine (not shown).

Step 50 (S50) The counting state of the number of products of the counting means 7 is output. Examples of the output method include a method of constantly displaying the current count state on a display or the like, and a method of outputting the count value at that time to a printer or the like as a record at the request of an operator.

Step 60 (S60) Steps 20 to 50 are repeated until the predetermined number of products is counted.

Step 70 (S70) When the count value of the counting means 7 reaches the value set by the discriminating means 5, a signal indicating the arrival is output from the counting means 7, and the set number of products is manufactured. become.

In this case, the arrival signal is output to the determination means 5 as described above, and the determination means 5 stops the determination processing. The determination means 5 can output the number of manufactured products to a printer or the like before the stop.

When the die casting product counting device of the present invention is independent of the control device of the die casting machine, when the product count value of the counting means 7 reaches a predetermined number of products, it is output to the control device of the die casting machine (not shown), It can be configured that the die casting machine is automatically stopped via the device, and the production of the die cast product is stopped.
Further, when the die casting product counting device of the present invention is incorporated in a control device of a die casting machine, the same processing can be performed in the control device.

FIG. 4 is a block diagram of a die casting product counting device as one embodiment of the die casting machine product counting device of the present invention shown in FIG. In this embodiment, this is realized using a microcomputer system. 2, the detecting means 1 shown in FIG. 2 comprises a pressure sensor 11, a speed detecting sensor 14 and a counter 15;
Has been realized. These are shown in FIGS.
This will be described later with reference to (d). The operating condition setting means 3 is a keyboard (KB) 31, and the discriminating means 5 is an arithmetic control unit (CPU).
50, a read only memory (ROM) 54 and a random access memory (RAM) 56, and the counting means 7 are a CPU 50 and a RAM 56,
The output means 9 is realized by a display (DSP) 91 such as a CRT and a printer (PRTR) 93. Further, an analog / digital converter 58 for taking in a signal from the pressure sensor 11 into the RAM 56 via the CPU 50 is connected to the CPU 50 via the bus 52.
It is connected to the. Further, the speed count value from the counter 15 is input to the CPU 50 via the bus 52 and stored in the RAM 56.

The ROM 54 stores a processing program to be executed by the CPU 50 described later. The RAM 56 stores the counting means 7 as described above.
The function of updating the count value of the product 1 injection (product counter function) is performed as a part of the process, and is used for temporarily storing various data.

FIGS. 5 (a) to 5 (d) show a schematic structure of a cold casting type horizontal casting horizontal die casting machine for an aluminum alloy as one of the die casting machines to which the die casting product counting device of the embodiment of the present invention is applied. The main operation modes are shown.

The basic normal operation mode of product 1 injection of this die casting machine is a hot water supply process (FIG. 5 (a)), a low speed injection process (FIG. 5 (b)), and a high speed injection process (FIG. 5 (c)). , Pressure-increasing and pressure-holding steps (FIG. 5 (d)), mold opening steps (not shown), pushing steps (not shown), piston returning steps (not shown), and the like.

Hereinafter, an outline of the normal operation of one injection for manufacturing a product will be described with reference to FIGS. 5 (a) to 5 (d) and a characteristic diagram of FIG.

As shown in FIG. 5 (a), in the hot water supply process, a predetermined amount of the aluminum
2 and is introduced into a sleeve 108 between the plunger 104 and the cavity 106. In the figure, the hatched portions indicate the molten metal.

Next, as shown in FIG. 5B, the molten metal introduced into the sleeve 108 is pushed at a low speed through the plunger 104 during the low-speed injection process. The low-speed injection is performed at a predetermined critical speed so as to prevent the formation of a cavity due to entrainment of air. To drive the plunger 104, hydraulic pressure is applied to the injection cylinder 114, the injection piston rod 112 is pushed out of the injection cylinder 114, and the plunger 1 is connected via the plunger rod 110 connected to the injection piston rod 112.
This is performed by pressing the 04 into the sleeve 108.

This low-speed injection operation is performed during a period shown from time t0 to time t2 in FIG. The injection piston rod 112 is provided with magnetic scales 140 at predetermined intervals in the longitudinal direction. More specifically, a metal injection piston rod 112 is provided with a nonmagnetic groove at a predetermined pitch. A magnetic sensor 142 for detecting the movement of the magnetic scale 140, that is, the movement of the injection piston rod 112, is provided at the tip of the injection cylinder 114. The magnetic scale 140 and the magnetic sensor 142 constitute the above-described speed detection sensor (in this case, a magnetic speed sensor) 14. That is, when the magnetic scale 140 provided in the longitudinal direction of the injection piston rod 112 is hydraulically moved together with the movement of the injection piston rod 112, the movement is shown by the SPD in FIG.
It is detected on the magnetic scale 140 as a velocity pulse represented as (P). The magnitude of the speed corresponds to the interval between detected pulses, in other words, the pulse frequency.
The speed pulse detected by the magnetic sensor 142 is counted by the speed counter 15 once. Since the speed counter 15 is updated at a predetermined cycle, the magnitude of the pulse counted at the predetermined cycle indicates the magnitude of the speed within a predetermined time. Then, the output of the speed counter 15 is transferred to the RAM via the CPU 50.
Stored in 56. The count speed of the speed counter 15 is shown as SPD (C) in FIG. on the other hand,
A pressure sensor 11 for measuring the injection pressure is provided in the injection cylinder 114 of FIG. 5B, and in this embodiment, a strain gauge type pressure sensor is provided, and the detected pressure value is shown in FIG. Indicated as PR. The detected pressure value from the pressure sensor 11 is stored in the RAM 56 via the A / DC 58 and the CPU 50 in FIG.

Since this die casting machine is a two-stage injection type die casting machine, the process shifts to the high-speed injection process (step) shown in FIG. 5 (c). Therefore, the injection piston rod 11
2 is moved at a high speed to fill the sleeve 108 with the molten metal at a high speed through the plunger 104, and then to fill the cavity 106 through the gate at the entrance of the cavity 106.

The operating characteristics in this case are shown in the period from time t2 to time t4 in FIG. That is, the speed SPD (C) is rapidly increasing. Also, the pressure PR is gradually increasing. When the plunger 104 is sufficiently pushed into the sleeve 108, the plunger 104 stops, so that the speed SPD (C) becomes almost zero.
(Zero).

After the time t4, a high pressure oil pressure is applied to the injection cylinder 118 having a large diameter to increase the pressure of the molten metal in the cavity 106 via the plunger 104.
After 1 = 30 ms, the pressure is maintained for a predetermined time T2 between times t5 and t6, for example, T2 = 165ms.

 Thereafter, processing after opening of the mold (not shown) is performed.

The above is the outline of the operation of one injection during the continuous product manufacturing operation.

On the other hand, in the case of the discarding operation, which is a warming-up operation of the die casting machine, the high-speed injection is not performed. Therefore, the easiest way to distinguish between the dumping operation and the normal operation is to identify the presence or absence of the high-speed injection. First, as a first example, the processing operation of the die casting product counting device in this case will be described.

As a condition for discriminating between the discard operation and the normal operation in step S10 in FIG. 3, the operator sets the data corresponding to the high-speed speed identification level SPD1 in FIG. ) Set to CPU 50 via keyboard 31. This setting data is stored in the RAM 56. The high-speed speed identification level SPD1 may be any value that has a sufficient margin for identifying the low-speed speed. In response to this setting, CPU 50
Clear an address in RAM56. This address functions as a counter for counting the number of products (hereinafter, referred to as a product counter).

In the above situation, A / DC 58
The pressure detection signal of the plunger from the pressure sensor 11 and the moving speed detection signal of the plunger from the speed detection sensor 14 and the counter 15 are input via the
In the figure, step S20), the speed detection signal does not exceed the high-speed speed identification level SPD1. Therefore, the determination by the CPU 50 based on the determination program incorporated in the ROM 54 does not detect high-speed injection (FIG. 3, step S30). Therefore, the product counter is not increased. That is, the number of products is not counted in the discard operation.

After the discarding operation, the operator corrects the number of products to be manufactured and, if necessary, the high-speed speed identification level SPD1 as a setting operation in step S10 in FIG. Set to.

In normal operation after the discard operation, high-speed injection is performed. Therefore, the CPU 50 determines that the speed detection signal changes from the low-speed state to the high-speed state and exceeds the high-speed speed identification level SPD1 (FIG. 3). , Step S30) and increment the product counter by one (FIG. 3, step S40). The value of this product counter is displayed on the display 91 by the CPU 50 (third
Figure, step S50). When the product counter reaches a predetermined number of products set by the operator (FIG. 3, step S60), the CPU 50 outputs a reaching signal to a control device (not shown), and a completion message is sent to the printer 93 as an end message. The number of products is output (FIG. 3, step S70).

Next, since the pressure increase is not performed in the dumping operation,
As a second example, a case will be described in which the presence or absence of pressure increase is added to the determination condition in addition to the high-speed injection detection. In this case, the pressure PR2 shown in FIG. 6 is used to determine the pressure increase. That is, the CPU 50 assumes that a product has been manufactured when the speed exceeds the high-speed speed identification level SPD1 and the pressure exceeds PR2 (FIG. 3, step S30). Other processes are the same as those described above.

As described above, in normal operation, high-speed injection and pressure increase are performed, and this is set by the mode changeover switch of the die casting machine control device. Therefore, as a third example, when these mode switches are input and the state becomes “ON”, it may be determined that the mode is switched from the discarding operation to the normal operation (FIG. 3, step S3).
0). Further, it may be combined with the speed detection signal and the pressure detection signal. However, it is necessary to use the change in the speed signal and / or the change in the pressure signal to determine whether the product 1 is ejected.

As a fourth example, a case will be described in which the speed information is increased as a setting condition, and the discrimination between the discard operation and the normal operation and the injection of the product 1 are more accurately performed. This further identifies the change in speed with the passage of time. Therefore, as shown in FIG. 6, the operator sets the speed in the low-speed injection process as step S10 in FIG.
The data corresponding to SPD0, the speed SPD at the start of the high-speed injection, the maximum speed SPD2 at the time of the high-speed injection, the speed SPD3 just before the end of the high-speed injection, and the speed SPD4 at the dwelling time (almost 0) are stored in the keyboard 31. To CPU50.

In such a situation, the CPU 50 determines that the speed detection signal sequentially becomes approximately SPD0, SPD1 or more, SPD2 or less, SPD2 or more, SPD3 or less, and almost SPD4, and the pressure is increased beyond the pressure PR2 ( In FIG. 3, step S30), the product counter is advanced by one (FIG. 3, step S40).

With this determination, as described above, it is possible not only to discriminate between the discard operation and the normal operation, but also to determine whether or not the manufactured product has been manufactured by a predetermined process. In other words, even if it is detected that the operation is not a dumping operation, if the speed change pattern does not match, the product counter is not updated, and it is determined that a product of a predetermined quality may not be manufactured. (Not shown in FIG. 3). In response to the alarm output, the operator can take measures such as interrupting the production or stopping the operation of the die casting machine by the tie casting machine control device.

In order to more accurately identify that the product in normal operation is normally manufactured, as a fifth example, pressure change information is further added. That is, in addition to the above-mentioned temporal change in speed, the pressure PR0 in the low-speed injection process, the pressure PR1 in the high-speed injection process, the pressure PR2 when increasing the pressure, and the pressure PR3 when maintaining the pressure in FIG. Set (3rd
Figure, step S10).

In the fifth example, the CPU 50 discriminates the speed detection signal and the pressure detection signal based on the set operation conditions, and not only accurately discriminates the discard operation from the normal operation (FIG. 3, FIG. Step S30), it can be determined whether or not the die cast product has been normally manufactured.

In order to make a more accurate determination, as a sixth example, the operator sets information such as the time T1, T2 in FIG. 6 and the low-speed injection time and the high-speed injection time as operating conditions. The CPU 50 determines whether or not the product has been manufactured in accordance with these operating conditions.

For more precise discrimination, as a sixth example, the dynamic characteristic curves of pressure and velocity in FIG.
Is set as the operating condition in the CPU 50, and the CPU 50 determines the operating condition. In this case, since the dynamic characteristic curve in FIG. 6 changes instantaneously, the dynamic characteristic curve itself is smoothed and input instead of the dynamic characteristic curve itself. Have a degree,
The three parameters of speed change, pressure change, and elapsed time are comprehensively determined. Further, the CPU 50 filters the speed detection signal and the pressure detection signal to eliminate an instantaneous effect and uses the filtered signal for the determination.

In the above, the product number counting for the two-stage injection type cold chamber type die casting machine has been described. However, the die casting product counting method and the die casting product counting apparatus of the present invention can be applied to other die casting machines, for example, a hot chamber type die casting machine for Zn alloy. The same applies to machines. Further, in implementing the present invention, it is needless to say that the configuration is not limited to the configuration illustrated in FIG. 4, and that various other device configurations that perform the above-described processing functions can be adopted. For example, as the counting means 7, the CPU 50
This product counter is cleared by the CPU 50 in an initial state, and a reference value corresponding to the number of products that generates a count-over signal is also set. Each time the CPU 50 determines normal product production, a one-pulse count signal is given to the product counter, and the product counter counts it. When the count reaches the reference value, a count-over signal is output to the CPU 50. Therefore, the CPU 50 terminates the determination process for counting the products, and the die casting machine control device can also terminate the control and perform processing such as stopping the die casting machine.

In the above embodiment, the case where the die casting product counting device is provided independently of the die casting machine control device has been described. However, the above-described functions may be incorporated in the die casting machine control device.

〔The invention's effect〕

As described above, according to the present invention, the discard operation of the die casting machine can be accurately distinguished from the normal operation, and the number of products in the normal operation can be accurately counted.

Further, according to the present invention, it is possible to determine whether or not the product production during the normal operation has been performed according to a predetermined pattern, so that there is an effect that normal production of the product can be detected.

[Brief description of the drawings]

FIG. 1 is a block diagram showing the principle of a die casting product counting method according to the present invention, FIG. 2 is a block diagram showing the principle of a die casting product counting apparatus according to the present invention, and FIG. 3 shows the operation of the die casting product counting method according to the embodiment of the present invention. Flow chart, FIG. 4 is a block diagram of a die casting product counting device according to an embodiment of the present invention, and FIGS. 5 (a) to 5 (d) are die casting machines as an example to which the die casting product counting device of the present invention is applied. And FIG. 6 is a diagram showing dynamic characteristic curves in FIGS. 5 (a) to 5 (d). (Explanation of reference numerals) 1... Detecting means, 3... Operating condition setting means, 5... Discriminating means, 7... Counting means, 9... Output means, 11. 15… Counter 15, 31… Keyboard, 50… CPU, 56… RAM, 104… Plunger, 106… Cavity, 112… Injection piston rod.

Claims (4)

(57) [Claims] At least one of a high-speed injection step and a pressure increase step is performed as a normal operation of a die-casting machine, and one injection of die-cast product manufacturing is normally performed in the normal operation state. A condition setting step of setting at least a low-speed injection step, a high-speed injection step, a pressure increasing step, and a pressure-holding step to be sequentially performed as one-shot end determination conditions; and detecting a speed of a plunger or an injection piston rod in the die casting machine. At least one of the high-speed injection step and the pressure increase step by comparing a reading of a speed sensor and a reading of a pressure sensor for detecting a pressure applied to the plunger or the injection piston rod with the set normal operation determination condition. The die casting machine is in a normal operating state when indicating that And when the reading of the speed sensor and the reading of the pressure sensor indicate that the low-speed injection step, the high-speed injection step, the pressure-increasing step, and the pressure-holding step set as the normal one-shot end determination condition are sequentially performed. A discriminating step of discriminating that one shot has been normally completed in the normal operation; and, if the discrimination result in the discriminating step indicates a normal operation state of the die casting machine, indicating that the normal one shot has been completed, A product counting step of counting the product. 2. In the condition setting step, a value of a speed of the plunger or the injection piston rod in the high-speed injection step as the normal operation determination condition;
At least one of the pressure values applied to the plunger or the injection piston rod in the pressure increasing step is set, and the plunger or the injection piston rod in the low speed injection step is determined as the normal one-shot end determination condition. A speed value, a speed value of the plunger or the injection piston rod in the high-speed injection step, a pressure value applied to the plunger or the injection piston rod in the pressure increasing step, and the plan in the pressure-holding step. Setting the value of the pressure applied to the jar or the injection piston rod, reading the speed sensor for detecting the speed of the plunger or the injection piston rod, and applying the pressure to the plunger or the injection piston rod in the determination step. Pressure sensor reading And a set value of the speed of the plunger or the injection piston rod in the high-speed injection step under the normal operation determination condition set in the condition setting step, and application of the plunger or the injection piston rod in the pressure increasing step. When it is determined that at least one of the high-speed injection step and the pressure increase step has been performed in comparison with a set value of the pressure to be performed, it is determined that the die casting machine is in a normal operation state, and the speed sensor Reading and the pressure sensor reading are set values of the plunger or injection piston rod speed in the low-speed injection step as the normal one-shot end determination conditions set in the condition setting step, and in the high-speed injection step. Set value of the speed of the plunger or injection piston rod, before The one shot is completed in comparison with the set value of the pressure applied to the plunger or the injection piston rod in the pressure increasing step and the set value of the pressure applied to the plunger or the injection piston rod in the pressure holding step. 2. The die casting according to claim 1, wherein when it indicates that the low-speed injection step, the high-speed injection step, the pressure-increasing step, and the pressure-holding step, which are set as the determination conditions, are sequentially performed, one shot is normally completed in the normal operation. Product counting method. 3. A normal operation of the die casting machine, wherein at least one of a high-speed injection step and a pressure increasing step is performed, and one injection of die-cast product manufacturing is normally performed in the normal operation state. Condition setting means for setting at least a low-speed injection step, a high-speed injection step, a pressure-increasing step, and a pressure-holding step to be sequentially performed, and a speed of a plunger or an injection piston rod in the die-casting machine. A pressure sensor that detects pressure applied to the plunger or the injection piston rod; and compares the reading of the speed sensor and the reading of the pressure sensor with the set normal operation determination condition. When indicating that any of the high-speed injection step and the pressure increase step has been performed Squid strike machine is in the normal operation state,
And when the reading of the speed sensor and the reading of the pressure sensor indicate that the low-speed injection step, the high-speed injection step, the pressure-increasing step, and the pressure-holding step set as the normal one-shot end determination condition are sequentially performed. Determining means for determining that one shot has been normally completed in a normal operation; and when the result of determination by the determining means indicates a normal operation state of the die casting machine and indicating that the normal one shot has been completed, a die casting product And a product counting means for counting the number. 4. The condition setting means sets a value of the speed of the plunger or the injection piston rod as the high-speed injection step as the normal operation determination condition, and
A pressure value applied to the plunger or the injection piston rod is set in the pressure increasing step, and the speed of the plunger or the injection piston rod in the low-speed injection step is determined as the normal one-shot end determination condition. Value, the value of the speed of the plunger or the injection piston rod in the high-speed injection step, the value of the pressure applied to the plunger or the injection piston rod in the pressure increasing step, and the value of the plunger or the pressure in the pressure-holding step. Setting the value of the pressure applied to the injection piston rod; and determining the reading of the speed sensor, the reading of the pressure sensor, and the high-speed injection under the normal operation determination condition set by the condition setting unit. Set value of the speed of the plunger or injection piston rod in the process And die-casting when it indicates that at least one of the high-speed injection step and the pressure increase step has been performed in comparison with a set value of a pressure applied to the plunger or the injection piston rod in the pressure increase step. The plan in the low-speed injection step is determined as a normal one-shot end determination condition set by the condition setting means when the speed sensor reading and the pressure sensor reading are determined to be in a normal operation state. A set value of the speed of the jar or the injection piston rod, a set value of the speed of the plunger or the injection piston rod in the high-speed injection step, a set value of the pressure applied to the plunger or the injection piston rod in the pressure increasing step, And the plunger or the injection piston lock in the pressure holding step. The set low speed injection step in comparison with the set value of the pressure applied to the high-speed injection step, when indicating that the pressure-increasing step and the pressure holding process is performed sequentially,
The die casting product counting device according to claim 3, wherein it is determined that one normal shot has been completed in the normal operation.