JPH06285576A - Apparatus and method for manufacturing rocking-forming punch - Google Patents

Abstract

PURPOSE:To easily manufacture a deformed rocking-forging punch used for a product having deformed finishing shape in a high accuracy by fixing a die prototype to a hydraulic unit part and fixing a rocking-forging punch blank to a shaking unit. CONSTITUTION:While rocking a main shaft 3 of the rocking unit part 16, the hydraulic unit part 17 is ascended and pressurized to pressure weld the die prototype 10 to the shake-forging punch blank 7. At this time, the rocking- forging punch blank 7 is partially plastic-deformed by being pushed by the die prototype 10. At the time of deformation in a fixed quantity, the rocking- forging punch blank 7 is separated from the rocking unit part 16 and the bulged part as the excess thickness is removed with a file, etc. The rocking forging punch blank 7 is fixed to the rocking unit part 16 again, and the hydraulic unit part 17 fixing the die prototype 10 is pressurized. While rocking the rocking-forging punch black 7, the die prototype 10 is press welded to the rocking forging punch blank 7, and continued until the shape of the die prototype 10 is transferred to the rocking-forging punch blank 7.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a swing forging punch manufacturing apparatus and a swing forging punch manufacturing method used for swing forging.

[0002]

2. Description of the Related Art Conventionally, there is no such device for manufacturing an oscillating forging punch used for oscillating forging, and a cutting machine or a grinding machine which is usually used for die processing, jig processing, etc. A lathe, NUMERICAL CONTROL
(Hereinafter referred to as NC) lathe, milling machine, NC milling machine,
The swing forging punch was manufactured with a grinder, an NC grinder, or the like.

[0003]

In the case of swing forging, since the product is forged while swinging the swing forging punch at an angle of about 0.5 to 2.5 °, the product surface is aimed at. In order to form the above shape, the tip of the swing forging punch has a shape in which the swing angle is corrected.

Therefore, even if the finished shape of the product is small, if one side is circular, the tip of the swing forging punch may have a conical shape with the swing angle corrected, and the swing forging punch is relatively easy to manufacture. You can

However, when the finished shape of the product is irregular (not circular) on both sides, it becomes a three-dimensional processing, which cannot be processed by a general cutting machine or grinding machine. Although there is an NC processing machine that enables this processing, the NC program is complicated due to three-dimensional processing, the programming is difficult, the processing time is very long, and the surface roughness is rough. Was there.

It is an object of the present invention, in particular, a swing forging punch manufacturing apparatus and a swing device for making it possible to manufacture a variant swing forging punch used for a finished product having a different shape with high precision and ease. It is to provide a method for manufacturing a dynamic forging punch.

[0007]

According to the structure of the present invention, a mold prototype or an oscillating forging punch blank having the same shape as a product shape can be detachably fixed, and the mold prototype or the oscillating forging punch can be attached. A swing unit having a function of swinging the blank and a mold prototype or a swing forging punch blank having the same shape as the product shape can be detachably fixed, and the mold prototype or the swing forging punch blank is also provided. It is composed of a hydraulic unit having a function of moving up and down by hydraulic pressure.

Further, the manufacturing method of this swing forging punch is as follows.
Fixing to a die prototype hydraulic unit having the same shape as the product shape; fixing an oscillating forging punch blank having a shape larger than the die prototype to the oscillating unit; The step of pressing and swinging with the swing forging punch blank, the step of removing the protruding portion of the swing forging punch blank by the pressing and swinging step, the step of pressing and swinging and removing the protruding portion The step of forming the shape of the swing forging punch by repeating the step of performing, the step of heat-treating the swing forging punch, and the step of polishing the swing forging punch. Also,
The step of fixing the die prototype to the swing unit and the swing forging punch blank to the hydraulic unit may be performed.

[0009]

According to the present invention, an NC machine is newly prepared, and an oscillating forging punch can be easily and accurately formed by a complicated program without forming for a long time.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a sectional view showing an outline of an orbiting forging punch manufacturing apparatus, FIG. 2 is a sectional view showing a state where an orbiting forging punch blank is pressure-molded, and FIG. 3 is a perspective view showing the orbiting forging punch blank. FIG. 4 is a perspective view showing the mold prototype, and FIG. 5 is a perspective view showing the formed swing forging punch. In FIG. 1, this device is roughly divided into a swing unit portion 16 and a hydraulic unit portion 17. The oscillating unit portion 16 is composed of an eccentric unit 1, a main shaft 3, a ball seat 4, a punch blank holder 8 and an oscillating forging punch blank 7. The external shape of the oscillating forging punch blank 7 is the inner shape of the punch blank holder 8. It is fixed by being fitted exactly to the shape. The inner shape and the outer shape of the punch blank holder 8 are accurately positioned. The punch blank holder 8 is accurately positioned and fixed at the center of the swing unit portion 16. Further, the main shaft 3 swings along the ball seat 4 by the eccentric unit 1. In addition, the main shaft 3 is provided with a rocking side rotation stopper 6 and a ball seat 4
The fixed-side rotation stoppers 5 are fixed to the main shaft 3 and the main shaft 3 can continue the swinging motion at a fixed position without rotating even if the main shaft 3 swings.

On the other hand, the hydraulic unit 17 includes a hydraulic cylinder 15, a ram 14, a guide post 11 and a mold prototype holder 1.
2 and mold prototype 10. The mold prototype 10 is processed into the same shape as the finished product shape, and the outer shape of the mold prototype 10 is positioned and processed with respect to the mold prototype holder 12. The outer shape of the mold prototype 10 is the mold prototype holder 1
It is set so as to fit exactly with the inner shape of No. 2. Further, the mold prototype holder 12 is accurately positioned and processed in the inner shape and the outer shape. Further, the mold prototype holder 12
Is accurately fitted and fixed in the central hole of the ram 14. In addition, the guide post 11 ensures that the positional relationship between the swinging unit 16 and the hydraulic unit 17 during pressurization is accurately maintained. The ram 14 can be moved up and down and pressed by a hydraulic cylinder 15.
2 is a press frame, 9 is a punch blank fixing screw, and 10 is a mold prototype fixing screw.

Next, a method of manufacturing the swing forging punch by the swing forging punch manufacturing apparatus described above will be described in the order of steps. The mold prototype 10 is fixed to the hydraulic unit portion 17, and the swing forging punch blank 7 is fixed to the swing unit portion 16.

Next, while swinging the main shaft 3 of the swing unit portion 16, the hydraulic unit portion 17 is raised and pressed to press the die prototype 10 and the swing forging punch blank 7 into pressure contact. At this time, the swing forging punch blank 7 is pushed by the mold prototype 10 and is partially plastically deformed. After being deformed by a certain amount, the swing forging punch blank 7 is removed from the swing unit portion 16, and the protruding portion that is the excess thickness is removed with a file or the like. Fix the swing forging punch blank 7 to the swing unit portion 16 again,
The hydraulic unit 17 to which the mold prototype 10 is fixed is pressurized, and the mold prototype 10 is pressed against the swing forging punch blank 7 while swinging the swing forging punch blank 7. This operation is continued until the shape of the mold prototype 10 is completely transferred to the swing forging punch blank 7.

Next, the formed swing forging punch 18 is heat-treated to obtain the required hardness.

Next, the heat-treated swing forging punch 18 is polished and completed.

Contrary to the embodiment of the present invention, the mold prototype 10 is fixed to the swing unit section 16, and the hydraulic unit section 1 is fixed.
Alternatively, the swing forging punch blank 7 may be fixed to and molded.

[0017]

As is apparent from the above description, according to the manufacturing apparatus of the present invention, it is possible to form the odd-shaped oscillating forging punch which could not be obtained without performing the three-dimensional processing by the NC processing machine. Now it can be done easily and with high accuracy. Also,
The roughness of the formed surface is also very fine compared to the NC milling machine, and therefore the finishing time is also shortened.

According to this manufacturing method, the swing forging punch can be easily formed with high accuracy even by a person who does not have knowledge of NC processing machines or processing technology. Also, the roughness of the formed surface is much finer than that of the NC milling machine, so that the finishing time can be shortened.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an outline of a swing forging punch manufacturing apparatus of the present invention.

FIG. 2 is a cross-sectional view showing a state where the swing forging punch blank is pressure-formed.

FIG. 3 is a perspective view showing a swing forging punch blank.

FIG. 4 is a perspective view showing a mold prototype.

FIG. 5 is a perspective view showing a formed swing forging punch.

[Explanation of symbols]

 1 Eccentric Unit 2 Press Frame 3 Spindle 4 Ball Seat 5 Fixed Side Rotation Stop 6 Swing Side Rotation Stop 7 Swing Forging Punch Blank 8 Punch Blank Holder 9 Punch Blank Fixing Screw 10 Mold Prototype 11 Guide Post 12 Mold Prototype Tool holder 13 Mold prototype fixing screw 14 Ram 15 Hydraulic cylinder 16 Swing unit part 17 Hydraulic unit part 18 Swing forging punch

Claims (3)

[Claims] 1. A swing having a function of swinging a mold prototype or a swing forging punch blank having the same shape as a product shape in a detachable manner and swinging the mold prototype or the swing forging punch blank. An apparatus for manufacturing an oscillating forging punch, comprising a unit section and a hydraulic unit section having a function of hydraulically moving a die prototype or an oscillating forging punch blank having the same shape as the product shape. . 2. A step of fixing a mold prototype having the same shape as the product shape to the hydraulic unit, a step of fixing an oscillating forging punch blank having a shape larger than the mold prototype to the oscillating unit, A step of pressing and swinging the die prototype and the swing forging punch blank; a step of removing a protruding portion of the swing forging punch blank by the pressing and swinging step; a step of pressing and swinging A step of forming the shape of the swing forging punch by repeating the step of removing the protruding portion, a step of heat-treating the swing forging punch, and a step of polishing the swing forging punch. Dynamic forging punch manufacturing method. 3. A step of fixing a mold prototype having the same shape as the product shape to the swing unit section, and a step of fixing a swing forging punch blank having a shape larger than the mold prototype to the hydraulic unit section. The method for manufacturing an oscillating forging punch according to claim 2.