RU2440208C2 - Machine for producing gauze connecting rods - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention relates to metal forming, particularly, to production of wire gauzes used as conveyor belts in whatever industry. Proposed machine comprise bed, drive, control system with billet length measurement assembly, wire feed and straightening assembly, rod forming mechanism and rod cutting mechanism with stationary knife and moving knife fitted on slide to reciprocate therewith. Rod cutting mechanism is provided with three-cam camshaft allows bending rod cut ends and comprises mandrel clamping and extension assembly, cutting assembly and rod end bending assembly. Every aforesaid cam serves to drive one said assemblies.

EFFECT: automatic operation, higher quality of rods.

9 cl, 4 dwg

Description

The invention relates to equipment for processing metals by pressure and can be used in the manufacture of wire mesh used as conveyor belts in some industries, for example, in the thermal tunnels of machines for packaging products in shrink film.

A device for the manufacture of connecting rods of wire mesh according to the copyright certificate of the USSR No. 110874, class. B21F 11/00, comprising a bed, a wire feed and straightening mechanism, a rod cutting mechanism, a drive and a control system including a workpiece length measuring mechanism,

However, the known device is intended for the manufacture of only smooth metal rods of a given length, intended, for example, for the manufacture of mesh used as a conveyor belt. The conveyor net with smooth connecting rods was not widely used.

A device for the manufacture of rods, which can be used for the manufacture of wire mesh, containing a bed, a mechanism for feeding and straightening the wire, a mechanism for forming a rod, a mechanism for cutting a rod, a drive and a control system including a mechanism for measuring the length of a workpiece, according to USSR copyright certificate No. 1402395, class B21F 11/00 "Device for the manufacture of rods."

The technological capabilities of the known device, compared with the previous one, are significantly expanded.

The composition of the known device includes a molding mechanism that makes it possible to produce both completely smooth and grooved connecting rods made with smooth ends for bending when assembling a conveyor mesh, the design of which, for example, is described in the book of V.T. Polunin, G. Gulenko N. . et al. “Conveyor belts”, Moscow, Patrice Lumumba University of Peoples' Friendship, 1973, p. 116, Fig. 90.

In our opinion, a perspective design of the conveyor grid is the grid according to the patent of the Russian Federation No. 2172287, class. 7В21G 15/54, application No.2000118355 of 07/10/2000, having a more durable board and a more attractive presentation in comparison with analogues.

The known device for the manufacture of rods allows the manufacture of rods perspective mesh with printed corrugations, however, in structural terms, the device is complicated. So, to transfer torque to all actuators, a large number of electromagnetic couplings are installed, which complicates the design and reduces the reliability of the device.

In addition, the known device forms the rods of the required profile and length, but does not make the bends of the ends of the rod, necessary for assembly and decoration of the side of the transporting net, and therefore requires the completion of the rod in terms of the design of the bends of the ends by manual operation.

A device for the manufacture of rods according to the utility model "Machine for the manufacture of rods" (RF Certificate No. 26980, class 7B21F 11/00), containing a frame, wire feed and straightening mechanisms, the formation of the rod, the length of the rod, as well as the drive and control system, including a unit for measuring the length of the workpiece, the drive consisting of two separate units connected through a control system, each of which contains an electric motor, while one of the units is kinematically connected with the wire feed and straightening mechanism and the mold mechanism of the rod, and the second with the mechanism of the segment of the rod containing the movable and fixed knives, while the movable knife is mounted on a slider with the ability to perform reciprocating movements with the drive through the lever system from the cam.

The device is structurally simpler than the known ones, however, the operation of bending the rod by the device is not performed and manual revision of the products is required.

The technical result of the present invention is the creation of a machine design for the manufacture of connecting rods of the mesh with bends at the ends, performing all operations in automatic mode without the use of manual completion of the rods.

The specified technical result is achieved due to the fact that the mechanism of the rod segments is equipped with a camshaft with three cams, is configured to bend the cut ends of the molded rods and contains a clamping unit and extension mandrels, a segment unit, a node for forming bends of the ends of the rods, each of the cams Designed to propel one of the mentioned nodes, respectively.

Also due to the fact that the camshaft cam, which drives the clamping unit and the extension of the mandrels, is made face.

Also due to the fact that the camshaft cams, which drive the segment unit and the unit for forming the bends of the ends of the rods, are made radial.

And also due to the fact that the knot for forming the bends of the ends of the rods is made in the form of two hollow shafts installed in bearings and connected by a gear cylindrical pair, at the ends of which levers with forming rollers are placed, an asterisk with an envelope chain is rigidly fixed to one of the shafts , one end of which is made with a tension spring, and the other interacts through the lever system with the cam of the knot of the formation of bends of the ends of the rods to ensure the rotation of the hollow shafts with forming rollers towards the other other from below upwards while moving the chain sprocket.

And also due to the fact that the node clamping and extending the mandrels is made in the form of two pairs of clamps of the rods, the lever system and the rocker arm, on which two mandrels are rigidly mounted, located with the possibility of reciprocating movements in the two mentioned shafts of the node for forming the bends of the ends of the rods, this at the edges of the rocker arm are two pairs of the said clamps rods.

And also due to the fact that the beam is made with the possibility of reciprocating movement from the camshaft cam via a linkage system.

And also due to the fact that the beam is equipped with springs installed with the possibility of releasing the rod from the clamp clamps of the rods and the withdrawal of mandrels from the zone of formation of the bends of the ends of the rods.

And also due to the fact that the working surfaces of the clamps of the rods are made along the profile of the rod.

Also due to the fact that the clamps of the rods are equipped with shock absorbers.

The machine for manufacturing the connecting rods of the mesh is simple in design, in addition, it automatically forms the bends of the ends of the rod necessary for assembling the mesh and the design of its bead, and eliminates the manual operation of finalizing the rod.

The invention is illustrated by drawings.

Figure 1 shows a General view of the machine for the manufacture of connecting rods of the grid, side view.

Figure 2 shows a section along aa in figure 1.

Figure 3 shows the place In figure 1 (the mechanism of the segments of the rod).

Figure 4 shows the kinematic diagram of the mechanism of the rod segments.

The machine for manufacturing the rods comprises a bed 1, a wire feeder and straightener 2, a rod forming mechanism 3, an electric motor and a gear drive of the feed mechanism, a straightening and bar forming mechanism 4, an electric motor and a gear reducer of the rod 5 cutting mechanism, a bar cutting mechanism 6, a control system with a unit for measuring the length of the workpiece (not shown in the drawings).

The wire feed and straightening mechanism consists of two groups of rollers 7 located in mutually perpendicular planes.

The rod forming mechanism consists of an upper forming sprocket 8, a lower forming sprocket 9, a upper forming sprocket body 10, a lower forming sprocket body 11, a gear pair with an adjustable profile consisting of a driven gear 12 and a drive 13 of FIG. 2 mounted on shafts corresponding to the sprockets 8 and 9, as well as guides 14, rigidly fixed in the housing 10 of the upper forming sprockets and enabling movement of the lower housing 11 mounted on them to change the center-to-center distance of the forming stars 8 and 9 in a straight line. 12 and 13 (figure 2) - a gear pair of gears with a changing tooth profile.

The mechanism of the segments of the rod 6 (figure 1) is equipped with a camshaft 20 made with three cams, a node for clamping and extending the mandrels, a node for the segments and a node for forming bends of the ends of the rods. On the camshaft 20 mounted control cams (figure 4);

- radial cam drive unit of the piece of wire 19;

- end cam of the wire clamping unit and extension of the inner mandrels 21;

- radial cam node bends the ends of the rods 22.

The camshaft 20 is driven from the electric motor and the gear drive of the mechanism of the rod 5 segments (Fig. 1), 4 - the electric motor and gear drive of the feed mechanism, the dressing and the molding mechanism of the rod, turning the motors on and off is done by the machine control system.

The machine control system (not shown in the drawings) is an electronic device that sets the duty cycle of all mechanisms. The machine can be configured to produce rods of various sizes in length.

The node for measuring the length of the workpiece of the control system is made in the form of an electric sensor (not shown in the drawings), which supplies pulses to the counting device of the system by the number of corrugations molded on the rod.

Movable 15 (figure 4) and fixed 16 knives of the mechanism, the segments of the rod 6 (figure 1) are placed in the gap between the forming rollers 26 and 27 (figure 4), located in turn between the pairs of clamps of the rods 38 and 39. The knife 15 is installed on the slider 17, the reciprocating movement due to the lever system 18 associated with the cam 19. The stroke is carried out from the cam 19 mounted on the camshaft 20, and the reverse under the action of the spring 23 (figure 4).

The bend forming unit for the cut ends of the rods contains two hollow shafts 24 and 25, the ends of which are equipped with levers with forming rollers 26 and 27. The shafts are mounted in bearings 30 and are interconnected by a cylindrical gear pair consisting of gears 31 and 32. On one of the shafts it is rigidly an asterisk 33 is fixed with its chain envelope 34. The end of the chain is connected to the tension spring 35, and the other end interacts with the cam via the linkage 36. When the chain 34 is moved through gears 31 and 32, the hollow shafts 24 and 25 are rotated and fixed on them forming rollers 26 and 27 towards each other from the bottom up. The return of the shafts to their original position is made by the spring 35.

The clamping and extension unit of the mandrels comprises a rocker 37. Two pairs of clamps of rods 38 and 39 are installed along the edges of the rocker arm. One clamp of each pair is rigidly connected to the rocker arm 37 and is made with a shock absorber 40 mounted along the clamp mounting axis.

In the middle part of the rocker arm are fixed two mandrels 41 and 42, each of which enters the corresponding cavity of the shaft 24 or shaft 25 and has the ability to reciprocate in the cavity as in the guide. The beam 37 with the clamps of rods 38 and 39 and the mandrels 41 and 42 mounted on it through the lever system 43 from the cam 21 can make a reciprocating motion. The return to the initial position of the rocker is due to the installed springs 44.

Structurally, the clamps of the rods 38 and 39 are made interchangeable, based on the range of manufactured rods. The working surfaces of the installed clamps must correspond to the profile of the batch of manufactured rods (smooth or with a certain pitch of the grooves).

The machine operates as follows.

The wire 45 from the unwinding device (not shown in the drawings) enters the rollers 7 of the feed and dressing mechanism, through which it is pulled by reduced forming sprockets 8 and 9. When pulling the wire, sprockets 8 and 9 form the corrugations of the future shaft.

The adjustment of the depth of the grooves during molding is carried out by changing the center-to-center distance between the sprockets 8 and 9, and the elimination of unnecessary gaps in the engagement and the adjustment of the groove profile are made by a gear pair of gears 12 and 13 with an adjustable tooth profile mounted on shafts corresponding to the forming sprockets 8 and 9. The length of the manufactured rod is set using the counting device of the control system by the number of corrugations on the rod.

The wire with flutes passes between the clamps of the rods 38 and 39.

After forming a predetermined number of riffles, the rotation of the sprockets 8 and 9 is stopped, the rotation of the camshaft and, accordingly, the cams 19, 21, 22 (Fig. 4) mounted on it are turned on.

The end cam 21 through the lever system moves the rocker of the clamping and extending assembly of the mandrels with the working surfaces of both pairs of clamps of the rods 38 and 39, clamps the wire, simultaneously moves the inner mandrels 41 and 42 in the two hollow shafts 24 and 25, pushing them into the bending zone of the rod by forming rollers. Cam 19 through the lever system 18, a movable knife 15, mounted on a slider 17, moves to a fixed knife 16 located between two pairs of clamps of the rods 38 and 39 with the wire clamped (clamps are made with a smooth or grooved working surface, depending on the type of rod made). A cut of the finished rod occurs. After cutting, the knife 15 returns to its original position with a spring 23.

The cam 22 during further rotation of the camshaft acts on the lever system 36 and moves the chain 34, which rotates the sprocket 33, and through the gears 31 and 32 the hollow shafts 24 and 25. The forming rollers 26 and 27 rotate from bottom to top towards each other and bend the cut ends wires around mandrels 41 and 42.

A second bend of the finished rod is formed (along the wire feed at the outlet of the finished rod) and the first bend of the next one without a rear cut.

The spring 35 returns all the links of the bend forming unit to the initial position, and the springs 44 return to the initial position all the links of the clamping unit and extend the inner mandrels.

The finally formed rod falls into the storage tray of the finished product (not shown in the drawings), and the machine cycle is repeated.

The present invention fully automates the manufacturing process of the connecting rods of the conveyor wire mesh, improves the quality of the manufacture of rods with the relative simplicity of the design of the machine for their manufacture.

Claims (9)

1. A machine for the manufacture of connecting rods of the mesh, comprising a bed, a drive, a control system with a unit for measuring the length of the workpiece, a wire feed and straightening mechanism, a rod forming mechanism and a rod cutting mechanism with a fixed knife and a movable knife mounted on a slide with a reciprocating mechanism movement by means of a lever system, characterized in that the mechanism of the segments of the rod is equipped with a camshaft with three cams, configured to bend the cut ends from molded rods and contains a node for clamping and extending the mandrels, a segment unit and a node for forming bends of the ends of the rods, each of the cams is designed to drive one of the said nodes, respectively. 2. The machine according to claim 1, characterized in that the camshaft cam, which drives the clamping and extension unit of the mandrels, is made face. 3. The machine according to claim 1, characterized in that the cams of the camshaft, which drive the segment unit and the node for forming the bends of the ends of the rods, are made radial. 4. The machine according to claim 1, characterized in that the node for forming the bends of the ends of the rods is made in the form of two hollow shafts mounted in bearings and connected by a gear cylindrical pair, at the ends of which levers with forming rollers are placed, while one of the shafts is rigidly an asterisk with an envelope chain is fixed, one end of which is connected to a tension spring, and the other interacts through a lever system with the cam of the knot for forming the bends of the ends of the rods to ensure the rotation of the hollow shafts with forming rollers on meeting each other from the bottom up when moving the envelope chain of the sprocket. 5. The machine according to claim 4, characterized in that the node clamping and extending the mandrels is made in the form of two pairs of clamps rods, lever system and rocker, on which two mandrels are rigidly mounted, located with the possibility of reciprocating movements in the two mentioned shafts of the forming unit bends of the ends of the rods, while at the edges of the beam there are two pairs of clamps. 6. The machine according to claim 5, characterized in that the beam is made with the possibility of reciprocating movement from the camshaft cam via a linkage system. 7. The machine according to claim 5, characterized in that the beam is equipped with springs installed with the possibility of releasing the rod from the clamp clamps of the rods and the withdrawal of mandrels from the zone of formation of the bends of the ends of the rods. 8. The machine according to claim 5, characterized in that the working surfaces of the clamps of the rods are made along the profile of the rod. 9. The machine according to claim 5, characterized in that the clamps of the rods are equipped with shock absorbers.

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