JPS5882617A - Shearing work - Google Patents

Abstract

PURPOSE:To enable preliminary machining and shearing to be carried out in one process by performing at first, said preliminary machining in which grooves are formed at a prescribed interval on the whole periphery of the side surface of a wire material by use of a blade which revolves in the direction perpendicular to the axis core of the wire material and by performing shearing work along said grooves by use of a shearing tool. CONSTITUTION:A wire material M is shifted by a prescribed distance in the direction of arrow B, and grooves MA are cut successively by the turning of a cutting tool 8. When a cylindrical body 6 is retreated, the cutting tool 8 and a roller 12 are separated from the wire material M. When the grooves MA are formed at a prescribed interval by the repetition of the operation described the above, the material is inserted into a shearing tool 2 through a supporting die 1 and sheared by the sliding of the tool 2 in the direction of arrow C, and then discharged.

Description

[Detailed description of the invention] The present invention relates to a method for shearing wire rods.

Conventionally, when extruding or heading (including upsetting) a wire rod using a press or a header, the properties of the cut surface that occur during the shearing process that is the preliminary process (for example, the slope of the end face, creases, scabs, sag, steps, etc.) )
Since this adversely affects the dimensional accuracy, surface scratches, mold life, formability, etc. of the molded product, a pre-applying process is usually inserted between the shearing process and the forming process to correct the cut surface.

For example, in the mass production process of extrusion molded products using a press, the insertion of an advance process complicates the production process, and the resulting decrease in production efficiency is considered to be difficult to avoid.

In view of the above-mentioned situation, an object of the present invention is to provide a shearing method in which pre-setting and shearing are performed in one step. The process involves forming concave grooves at predetermined intervals on the entire circumference of the side surface of the wire using a cutting tool, and then shearing the wire along the concave grooves using shearing force.

Hereinafter, a configuration example of a shearing device to which the shearing method of the present invention is applied will be explained based on the accompanying drawings. l is wire rod M
A through hole 2a is bored in the center of the supporting die for inserting the wire M with a shearing force of 2. 3 is sheared wire S
The discharge pin M is a contact plate that lightly contacts the shearing force 2. Reference numeral 6 denotes a cylindrical body that can be reciprocated in the axial direction of the wire M by a drive source (not shown), and a cylindrical inclined surface 6a is formed inside the end thereof. Reference numeral 7 denotes a disk that is rotated in a direction perpendicular to the axis of the wire M by a drive source (not shown). The cutting tool is a cutting tool for processing the wire rod M in advance (cutting a concave groove), and this tooling tool is fixed to the first supporting arm 9 with a pin 9a. One end of this support arm 9 is supported on the disk 7 by a bolt IO in a loosely fitted state, and the other end is a roller 13a that rotates on its own axis while contacting the inclined surface 6a. It is screwed by a. Also, /2 is a roller that rotates while contacting the outer peripheral surface of the wire M, and this roller 12 is arranged at a position opposite to a cutting tool that cuts a concave groove (for example, a ■-shaped groove) MA on the outer peripheral surface of the wire M. It has the effect of reducing the deflection of the wire M when cutting a concave groove, and the cushioning material /ja is inserted into the second support arm IS and loosely fitted onto the fixed shaft 16, and the nut 17 It is screwed on. One end of this support arm 15 is loosely fitted)
The roller /3'O is supported on the disk 7 by //, and the other end rotates on its own axis while contacting the inclined surface Oa, and the bolt 1lIb
It is screwed on. 19a and /9b are the pins ira, trb fixed to the disc 7 by tension springs, and the first
The support arm 9, the through hole 20F3 bored in the second support arm/S.
．． 20b, and always keep the rollers 13a, 13
b is urged to abut against the inclined surface 6a.

In the shearing device configured as described above, when the wire M is moved a predetermined distance in the direction of the arrow A by an appropriate means and the cylindrical body 6 is advanced a predetermined distance in the direction of the arrow A, the disk 7 rotating at high speed is moved. The first supporting arm 9 is freely screwed onto the roller/3E3. , /3b rotates on its own axis while contacting the inclined surface A, and the bolt 10, /l
Rotates around the center. Therefore, the cutting tool t fixed to the first support arm 9 moves forward toward the wire M and cuts a concave groove MA shown by a chain line in FIG. At the same time, the roller 12, which is pivotally supported by the second support arm lS, also rotates in contact with the wire M, and is supported so as to substantially eliminate the deflection of the wire M when cutting the concave groove MAO. . Next, a concave groove MA of a predetermined shape is cut into the wire M, and when the cylindrical body 6 is retreated, the first/second support arms 9, 1S return to their original positions due to the elasticity of the tension springs /9a, /9b. I returned to work part-time.
The roller 12 separates from the wire M.

By repeating such operations, the wire M, which has been cut with concave grooves MA at predetermined intervals, is passed through the support die l and subjected to a shearing force of 2.
into the through hole 2a't until it abuts against the contact plate l. In this case, adjustment is made so that the valley MN of the concave groove MA is always at the sliding position between the support die I and the shear force 2. Next, when the shearing force 2 is applied by an appropriate means to slide the wire in the direction of the arrow C, the wire M is sheared along the valley MN of the concave groove, as shown in FIG. When the sheared wire SM in the shearing force 2 moves to the position of the discharge bin 3, the discharge pin 3 is moved completely to the right by appropriate means to discharge the sheared wire SM from the shearing force 2 and convey it to the next process. .

Thereafter, the shearing force 2 is returned to the position shown in Fig. 1, and the wire M having the concave groove MA is again inserted into the through hole 2a of the shearing force, and the shearing force 2 is moved in the same manner as described above to shear the wire M. Repeat. In this case, since the cutting of the concave groove MA is started when the shearing force is removed from the support die I, the machining and shearing are linked in the pre-applying process.

The shearing method of the present invention dramatically improves productivity, for example, in a multi-stage press operation in which shearing and subsequent extrusion processing are performed continuously.Although the above embodiments illustrate the case of wire rods, , can also be applied to polygonal materials. In addition to the ■-shaped groove, a concave groove can also be used.

As described above, in the conventional method, the wire rod was sheared and the tip was processed, but in the method of the present invention, the wire rod with the tip processed (concave groove cut) is supplied to the shearing device. There are no puns or paris. This eliminates the conventional process of pre-applying each sheared wire rod.
This is a significant technological achievement that can significantly improve production efficiency by reducing setup man-hours, mold costs, and mold ancillary costs.

[Brief explanation of the drawing]

Figures 1-4 are drawings illustrating the shearing method of the present invention, Figure 1 is a cross-sectional view showing the state 7 in which the processed 1s is inserted into the shearing force, and Figure 2 is the same as in Figure 1. A cross-sectional view along A-All, FIG. 3 is a cross-sectional view showing the sheared state 7 of the wire,
FIG. q is a sectional view showing the entire discharge state of the sheared wire. 2... Shearing force, Za... Cutting tool (by)), M...
Wire rod, MA...concave groove. Patent applicant Figure 2

Claims (1)

[Claims] (+) A cutting tool that rotates in a direction perpendicular to the axis of the M material is used to form concave grooves at predetermined intervals around the entire side surface of the wire. A shearing method characterized by shearing along the line. (The shearing process direction according to claim 1, which is applied to a multi-stage press operation in which shearing process and subsequent forming process are performed continuously.