JPS596961Y2 - Lining of square material supply device in automatic lathe - Google Patents

Description

[Detailed description of the invention] This invention relates to a square material supply device in an automatic lathe, and particularly to a lining that is attached to a square material supply device that divides a stock tube into two parts and receives the square material when the stock tube is opened.

Conventionally, as shown in FIG. 5, this type of lining 3 is attached to a stock tube 1 via a cushion rubber 2, and a cutting line 3a is provided at the same position so as to correspond to the cutting line 1a of the stock tube 1. When the stock tube 1 is opened, the lining 3 is also opened to receive the square material, and then closed again to supply the square material to the processing position.

There is no problem with this kind of equipment if the material is a round material, but when the material is a square material, the ridgeline of the square material becomes parallel to the cutting line of the lining 3 when it is chucked and rotated by the main shaft of the automatic lathe. There were various problems such as interference between blocks, preventing smooth rotation of the square timbers, and increased noise.

This idea was devised in view of the above, and the cutting line of the lining to be attached to the stock tube is cut along a plane that makes a certain angle to the axis of the stock tube at a position corresponding to the cutting line of the stock tube. It is characterized by having been provided with

This invention will be explained below based on the drawings.

The lining 3 is made of nylon so as not to damage the square timber, and is diagonal in the axial direction, that is, at a certain angle (preferably at an angle of about 5 degrees) with respect to the axis of the stock tube 1, which will be described later. It is cut at two 180 degree symmetrical positions along the plane forming the plane.

3a, 3a are cutting lines. The inner diameter side of the lining 3 in contact with the square timber is chamfered \3b.

3 and 4 show the lining 3 attached to the stock tube 1.

The stock tube 1 is parallel to its axis and is divided into two semicircular cross-section members by two diametrically opposed cutting lines 1a, 1a. Cutting line 1a of tube 1
, 1a via cushion rubber 2.

Normally, stock tube 1 is 2500 mm to 3000 mm.
Since the length of the lining 3 is about 50 mm, 9 to 11 linings 3 are provided at appropriate intervals with respect to the stock tube 1.

The stock tube 1 to which the lining 3 is attached in this way is divided into two parts, one of which serves as a fixed part and is attached to a material support holder 5, and the other part serves as a movable part and is attached to a shaft 7, as shown in FIG. It is attached to a hinge 6 which is rotatable with respect to the material support holder 5 using the material supporting holder 5 as a fulcrum.

Although not shown, when the square material is fed from the material shelf toward the stock tube 1, the hinge 6 rotates about the shaft 7, and the lining 3 along with the stock tube 1 rotates.
to open.

When the square material is fed into the stock tube 1, the lining 3 closes together with the stock tube 1, and a feeding mechanism (not shown) sends the square material into the main shaft of the automatic lathe, where it is chucked by the main shaft chuck and rotated.

At this time, since the ridgeline of the square timber is rotated while constantly contacting the lining 3, the ridgeline of the square timber intermittently contacts and interferes with the cutting line of the lining.

In this case, in the conventional lining 3, the cutting lines 3a, 3a are parallel to the ridgeline of the square timber as shown in Fig. 5, so they interfere with each other due to line contact, so the rotation of the square timber is at the cutting lines 3a, 3a of the lining 3. The operation is intermittent, as in the 1:00 stop, and the operation is not smooth and the noise is too loud.

However, in this invention, the cutting line 3a of the lining 3,
3a is bored diagonally at an angle of about 5 degrees, so it is not parallel to the ridgeline of the square timber, and the ridgeline of the square timber and the cutting lines 3a, 3a of the lining 3 form a point contact, and this point contact changes as the square timber rotates. Since it moved continuously in the axial direction, the square timber rotated smoothly without interfering with the cutting lines 3a, 3a of the lining 3.

Since the lining 3 is opened together with the stock tube 1 to receive the square timber, if the angle of the cutting lines 3a, 3a (in this invention, it is about 5 degrees) is too large, the square timber will interfere with the lining 3 when supplying the square timber. You can't make it bigger.

According to the results of experiments, an angle of about 5 degrees is most preferable, and the square timber can be rotated smoothly.

As mentioned above, in this invention, the lining attached to the stock tube is cut diagonally in the axial direction so that it does not interfere with the ridgeline of the square timber, so the rotation of the square timber is continuous instead of intermittent as in the past, and noise is generated. Also, there is no longer any chance of the square timber itself interfering with the cutting line of the lining and causing scratches.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the lining according to this invention, and Figure 2 is a front view. Figure 3 shows the stock tube with the lining attached and being opened to accept the square timber.
The figure is a cross-sectional view showing the stock tube with the lining attached. FIG. 5 is a partially omitted sectional view showing a state in which a conventional lining is attached to a stock tube. In the figure, 1 is the stock tube, 2 is the cushion rubber, 3 is the lining, and 3a, 3a are the cutting lines.

Claims (1)

[Scope of utility model registration request] In a material supply device in which the stock tube is divided into two semicircular cross-section members by two cutting lines parallel to its axis and diametrically opposed, the cutting line of the lining attached to the stock tube is A lining for a square material supply device in an automatic lathe, characterized in that the lining is provided along a plane forming a certain angle to the axis of the stock tube at a position corresponding to the cutting line of the stock tube.