JPS5828679Y2 - Cutting equipment for cold forging materials - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a cutting device for a forging material (blank) in a material supply section of a header machine.

For example, the general process for manufacturing cylindrical container parts 12 as shown in FIG. The forged material is cut into a forged material, and this forged material is fed into the mold for the next process by continuous cutting operations, and here, each time the movable head moves, processing and feeding to the next process are performed. Then, a cylindrical container part is formed by carrying out processing such as upsetting, intrusion processing, and extrusion processing.

In addition, the continuous process described above not only increases mass production efficiency, but recently there are many cases where there are demands for material yields close to 100% and for header processed products to be able to be used as 11 functional parts without additional processing. It has become.

In order to satisfy these requirements, the mold at the final stage of the header process described above must have a closed type or a structure close to a closed type.

However, a drawback peculiar to closed molds is that problems occur regardless of whether the volume of the forging material is large or small relative to the mold volume.

That is, if there are many, the mold may be pushed up and destroyed, and if there are few, the entire length of the part will be insufficient.

Variations in the volume of the forged material can be managed as variations in cutting length for a round bar with a constant material diameter, but ordinary cutting equipment cannot be used because the variation in cutting length is large.

Furthermore, in order to improve the accuracy of parts, in addition to eliminating the above-mentioned variations in cutting length, it is also necessary to ensure the perpendicularity of the cut surfaces.

In other words, the cut surface is perpendicular to the axis of the forged material, and
Both cut surfaces must be parallel.

By securing this angle, it becomes possible to secure the end face ridgeline portion of the processed part.

However, as shown in FIG. 2, the conventional cutting device has a holder 14 fixed to a stationary part 13 of a header machine, a guide hole 15 of the material 3 to be cut, and a fixed blade located at the end of the guide hole 15. 2 is attached to the stopper 17 that supports the material 3 that is forwardly transferred by the material feeding device 16.
is fixed to a stationary part of the header machine in front of the fixed blade 2, and a movable blade 5 is fixed to a movable blade holder 6 fixed to a movable blade mount 18 of the header machine.

When cutting a material using a conventional cutting device with such a structure, the cut portion of the material is not subjected to a restraining force in the equiaxial direction, so it is possible to secure the cutting length of the forged material and to maintain a wide angle of the cutting surface with respect to the axis. Securing, etc. is insufficient.

The object of this invention is to provide a cutting device for cold forging materials that advantageously solves the above-mentioned problems.

Next, this invention will be explained in detail using illustrated examples.

3 to 6 show a cutting device for cold forging materials according to an embodiment of this invention, in which a fixed blade holder 1 holds a fixed blade 2 in a stationary part 13 of a header machine.
4 is fixed, and a material return prevention chuck 1 consisting of a collect chuck disposed adjacent to the rear of the fixed blade holder 14 is rotatably attached to a chuck holder 19, and the chuck holder 19 is attached to the stationary part. 13, and the center of the chuck 1 and the fixed holder 1
The material feeding device 16 moves the material 3 into the chuck 1. The material is configured to be sequentially fed into the material passage hole 20 of the fixed blade holder 14 and the center hole of the fixed blade 2.

The operating rod 21 of the chuck 1 is operated in conjunction with the completion of feeding the material, so that the chuck 1 grips the material 3, and the chuck 1 prevents the material 3 from returning or moving backward.

When cutting is completed, which will be described later, the operating rod 21 releases the chuck 1 so that the material 3 can be moved freely.

A support base 4 integrally provided with a guide shaft 7 is fixed to a movable blade mounting base 18 in a header machine, a movable blade holder 6 holding a movable blade 5 is fixed to the support base 4, and the guide shaft 7 and the movable blade holder 6 extend in a direction perpendicular to the axis of the material 3, and a slider 9 having an abutting member 11 when feeding the material is fitted onto the guide shaft 7 so as to be slidable in the axial direction, Normally, the slider 9 is pressed against the stopper 22 at the end of the shaft by a spring 8 fitted onto the guide shaft I and interposed in a compressed state between the support base 4 and the slider 9.

In the bullet storage chamber 23 provided in the slider 9, there are a bullet body 10 made of a metal spring or rubber, a front presser metal fitting 24 and a rear presser metal fitting 25 that are in contact with the front and rear parts of the bullet body 10. The male threaded shaft at the front of the abutment member 11 is screwed and tightened into the female threaded cylinder at the rear of the rear presser fitting 25, so that the abutment member 11 and the rear presser fitting 25 are integrally coupled, and the female threaded cylinder is inserted into the guide hole at the rear of the slider 9, and when the abutting member 11 is brought into contact with the rear surface of the slider 9, a gap 26 is created between the rear end surface of the projectile body storage chamber 23 and the rear presser fitting 25. The interval between the abutment member 11 and the rear presser metal fitting 25 is set such that the abutting member 11 and the rear presser metal fitting 25 are formed such that It is configured to be able to move forward and backward.

The bolt 27 screwed onto the front part of the slider 9 is engaged with the front holding fitting 24, and when the bolt 27 is rotated in the tightening direction, the elastic body 10 is compressed by the front holding fitting 24. Energy is stored in and the projectile 10
The elasticity acts to press the rear presser fitting 25 and the abutment member 11 rearward.

FIG. 3 shows a state in the middle of the operation, and the abutting member 11 is in close contact with the rear surface of the slider 9 because the forward feeding force of the material 3 is greater than the backward pressing force.

A stopper 28 that restricts the downward movement of the slider 9 is fixed to a stationary part of the header machine, and
The distance between the slider 9 and the stopper 28, that is, the stroke of the slider 9, is set to be slightly larger than the diameter of the material 3.

An operating pin 30 is slidably inserted into a projectile housing hole 23 formed in the slider 9 and a pin hole 29 extending in a direction parallel to the center line of the guide hole, and is integrally provided with the sono pin 30. A spring 31 that acts to press the pin 30 backward is engaged with the flange.
The rear end portion of the pin 30 is pressed against the front surface of the abutting member 11 by the elasticity of the pin 30 .

A microswitch 32 facing the front end of the pin 30 is attached to the slider 9, and an operating signal from the microswitch 32 controls the moving clutch of the movable blade mount 18 and the chuck 1.

An upsetting die 33 for the next process, which is attached to a stationary part of the header machine, is arranged below the stopper 28, and the forged material cut to a predetermined length by the cutting device of this invention is placed in the upsetting die 33 and Upsetting is performed by the movable punch 34, and the product is sequentially sent to the next process and one after another to become a finished product.

FIG. 5 shows the state of each part when the material is not being fed, and the chuck 1 releases the material and is moved to the retracted position by the abutment member 11 and the rear presser fitting 25 and the force spring 10. At the same time, the pin 30 is moved to the retracted position by the spring 31, and the microswitch 32
is in the off state.

Next, when the material 3 is moved forward by the operation of the material feeding device 16, the abutment member 11 is moved forward by the material 3 against the elasticity of the elastic body 10, and the abutment member 11 moves the pin 30 is moved forward and its pin 30
The forward movement of the microswitch 32 causes the microswitch 32 to be turned on.

When the microswitch 32 is turned on, the chuck 1 grips the material 3 in response to the signal and prevents the material 3 from returning or moving backward.

FIG. 3 shows just such a situation.

Subsequently, the clutch of the movable blade mount 18 is engaged by the ON signal of the microswitch 32, and the movable blade mount 18 and the support base 4 supported by it are connected. Movable blade holder 6, movable blade 5. The guide shaft I, slider 9, etc. are moved downward, and the fixed blade 2 and movable blade 5 cut the material 3 into a predetermined length.

What is important here is that the part of the material 3 to be cut is constantly receiving the elasticity of the bullet 10 applied when feeding the material, even during the cutting operation, and that the part of the material 3 to be cut is constantly receiving the elasticity of the elastic body 10 applied when feeding the material, and that Even if a return force is applied, the material 3 is prevented from moving backward by the chuck 1, and even before the cutting is completed, the material 3 is subjected to restraining forces from both the front and rear sides.

According to the experiment, the material diameter is 14.6 mm and the material is J.
In the case of IS-BSRZA-0 (7), the binding force is 280
It was found that it is optimal to use around Kg.

Moreover, in order to provide the binding force, it is natural that a material feeding force of 280 edges or more is required.

Since the movable blade mount 18 moves downward even after cutting is completed, the lower surface of the slider 9 hits the stopper 28, and then the slider 9 slides on the guide shaft I against the spring 8, and the movable blade mount 18 reaches the lower limit. When moved in position, the state shown in FIG. 6 is reached.

The forged material 3' cut at right angles to a predetermined length is cut by a movable blade 5.
is held and moved to a position opposite to the upsetting mold 33, and then upsetting is immediately performed by the movable punch 35.

The movable blade mounting base 18 immediately returns to its original position after the forging material 3' is moved to the upsetting die 33, and the slider 9. The movable blade 5 etc. return to the original starting position as shown in FIGS. 3 and 4, and the abutting member 11
is returned to the retracted position by the force of the projectile body 10, and the pin 30 is further returned to the retracted position by the spring 31, so the microswitch 32 is turned off, and the chuck 1 is opened by the signal, and the material feeding device 16
works.

In addition, the movable blade 5. Fixed blade 2. When changing the chuck 1 etc. to cut materials of different diameters, the cutting force differs depending on the material diameter, so it is necessary to change the restraining force proportionally, but if you want to change the restraining force, use the bolt 27 to adjust the compression force of the elastic body 10.

When implementing this invention, other types of chucks may be used instead of the collet chuck as the material return prevention chuck 1.

According to this invention, the rear part of the part of the material 3 to be cut is restrained by the material return prevention chuck 1, and the front end of the part to be cut is applied with a restraining force by the elastic body 10. Moreover, this restraining force is continuously applied at the time when cutting by the movable blade 5 and the fixed blade 2 is completed (1), so the variation in cutting length of the forged material, which is a drawback of conventional cutting devices, is significantly reduced, and The perpendicular precision of the cut surface to the material axis is improved, which not only greatly contributes to improving the precision of the header parts, but also has the effect of eliminating mold breakage accidents in the next nine subsequent steps.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional side view of a cylindrical container component, and FIG. 2 is a partially vertical schematic side view showing a conventional cold forging material cutting device. Figures 3 to 6 show the cutting device for cold forging materials of this invention, and Figure 3 shows a state in which a restraining force in the axial direction is applied to the portion of the material to be cut. 4 is a sectional view taken along the line A-A in FIG. 3,
FIG. 5 is a longitudinal side view showing the state of each part before the material is fed to the cutting position, and FIG. 6 is a longitudinal side view showing the state in which the movable part is lowered at the lower limit position 1 after cutting is completed. In the figure, 1 is a chuck for preventing material return, 2 is a fixed blade, 3 is a raw material, 3' is a forged material, 4 is a support stand, 5 is a movable blade, 6 is a movable blade holder, 7 is a guide shaft, and 8 is a spring ,
9 is a slider, 10 is a projectile, 11 is an abutment member,
14 is a holder, 16 is a material feeding device, 19 is a chuck holder, 21 is a chuck operating rod, 22 is a stopper, 23 is a projectile housing chamber, 24 is a front presser metal fitting, 25
26 is the rear holding metal fitting, 26 is the gap, 27 is the bolt, 28 is the stopper, 30 is the operating bottle, 31 is the spring, 32
33 is an upsetting type, and 34 is a movable punch.

Claims (1)

[Scope of utility model registration request] A fixed blade 2 is provided at the front of the material return prevention chuck 1, and a movable blade 5 disposed at the front of the fixed blade 2 is mounted on a support base 4 that is moved in a direction perpendicular to the axis of the material 3. The movable blade holder 6 held therein and a guide shaft 7 extending in a direction perpendicular to the axis of the material 3 are fixed, and the guide shaft I has a slider pressed toward the tip of the guide shaft by a spring 8. 9 is slidably fitted in the slider 9, and an abutment member 11 that is pressed against the front end surface of the material 3 by the elasticity of the projecting body 10 is fitted in the rear part of the slider 9 so as to be movable in the front-back direction. A cutting device for cold forging materials, which is characterized by: