JP2000107830A - Trimmer for forming outer peripheral part of bar member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simply and quickly form the outer peripheral part into a prescribed shape with a trimming without applying the cutting with a milling machine even in the case of being a round bar blank needing a long cutting stroke, by arranging an edge part for cutting the outer peripheral part at the die side into the prescribed shape with the pressing of the blank to the die and a hollow part allowable to insert a prescribed quantity of the cut outer peripheral part. SOLUTION: The cylindrical nut blank A is trimmed so that both side surfaces of the outer peripheral part form as the flat. Separately from the edge part 6a arranged at a trimmer punch 6 in the trimmer, the edge part 1a for cutting the outer peripheral part at the die side into the prescribed shape with the pressing of the nut blank A to the trimmer die 1 and the hole part 1b allowable to insert the prescribed quantity of the cut outer peripheral part, are arranged. In this way, since the outer peripheral part of the nut blank A can be cut with both of the edge part 6a and the edge part 1a, the aimed trimming can be obtd. Then, the edge thickness at the front surface of the edge part 1a in the trimmer die 1 is formed as thinner than the edge thickness at the front surface of the edge part 6a in the trimmer punch 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trimmer for forming an outer peripheral portion of a rod-like member for forming an outer peripheral portion of a supplied round rod-shaped material into a predetermined shape by trimming.

[0002]

2. Description of the Related Art Conventionally, as a trimmer for forming a polygonal head made of a bolt material having a round head, Japanese Utility Model Publication No.
No. 759 is known. The trimmer described in this publication is a trimmer dice provided on a machine base, and moves forward and backward with respect to the dice in front of the dice,
Bolt material is press-fitted to the outer periphery of the round head to make the round head 6
It is provided with a streamer punch having a blade portion for cutting into a square shape, and a pressing pin for pressing a bolt material cut by the punch to separate cutting chips from the round head.

In this trimmer, the punch causes the shaft of the bolt material to be inserted into the die by its forward movement, and is pressed into the outer periphery of the round head of the material to form a hexagonal outer periphery of the round head. Cut into shape. Then, after the advance of the punch is completed, a part of the cutting head is connected to the round head by the advancement of the pressing pin toward the punch side, and the cutting waste remaining between the die and the punch is separated from the head. The bolt material is extruded toward an extraction hole provided in the punch and discharged to the outside.

[0004]

By the way, in the above-mentioned trimmer, there is no problem in trimming the outer periphery of the head with a normal bolt having a low head height. For example, a special bolt whose head height is set higher than a normal bolt is trimmed to the head of the bolt material, or an oval cross section formed by forming a flat surface over the entire length on both sides of the outer peripheral portion of the cylindrical material. When performing trimming or the like on the outer peripheral portion of the material of the embedding nut having the shape, the cutting stroke by the punch becomes longer and the load on the punch becomes larger, so that there has been a problem that the adoption becomes difficult.

[0005] Therefore, when forming the outer peripheral portion of the above-mentioned special bolt or embedding nut into a predetermined shape, the round head of the bolt material or the outer peripheral surface of the nut material is cut by a milling machine without using a trimmer. However, in such a case, there is a problem that the operation is complicated and time-consuming, and the productivity is poor.

Therefore, the present invention can easily and quickly form the outer peripheral portion into a predetermined shape by trimming without cutting with a milling machine even for a round bar-shaped material requiring a long cutting stroke. Another object of the present invention is to provide a trimmer for forming an outer peripheral portion of a rod-shaped member that can improve productivity.

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 of the present application comprises a trimmer die 1 provided on a machine base 4 and a front-rear movement with respect to the die 1 in front of the die 1. Then, a streamer punch 6 having a blade portion 6a for cutting the outer peripheral portion into a predetermined shape by press-fitting the outer peripheral portion of the round bar-shaped raw material A, and pressing the raw material A cut by the punch 6 to remove the cutting waste a The pressing member 1 to be separated from the outer peripheral portion
In the trimmer for forming the outer peripheral portion of the rod-shaped member provided with 0, a blade portion 6a for cutting the outer peripheral portion on the die side into a predetermined shape by press-fitting the material A into the die 1, and a predetermined amount of the cut outer peripheral portion. And a hole 6b that allows the insertion of a hole.

Further, the invention of claim 2 is characterized in that the blade thickness X on the front surface of the blade portion 1a of the trimmer die 1 of the invention of claim 1 is formed smaller than the blade thickness Y on the front surface of the blade portion 6a of the trimmer punch 6a. I do.

The round rod-shaped material is a concept including not only a cylindrical material but also a cylindrical material and a bolt material having a round head at one end of a shaft portion.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a trimmer formed by trimming the cylindrical nut material A shown in FIG. 2 so that both sides of the outer peripheral portion thereof are flat to form the outer peripheral portion of the embedding nut N as shown in FIG. .

In FIG. 1, reference numeral 1 denotes a trimmer die provided in a die holder 3 of a machine base 2, and a ram 4 which is moved back and forth by operation of a crank (not shown) is disposed in front of the dice 1. In a punch holder 5 fixed to the ram 4, a trimmer punch 6 is provided on the same axis as the die 1.

As shown in FIGS. 4 and 5, the die 1 has an oval blade 1a formed by cutting two sides of an outer periphery of a nut material A to form an oval shape, and the die 1 is cut by the blade 1a. Oval hole 1 with oval cross section to allow insertion of nut material A
b, and the rear end of the die 1 is supported by a load receiving block 7 supported in the die holder 3. Also,
In the hole 1b, a guide pin 9 fixed to the support block 8 is penetrated on the axis thereof, and a cylindrical stripper 10 having an oval cross section is provided on the outer periphery of the guide pin 9. , The reamer die 1 and the receiving block 7 are slidably supported. The tip of the guide pin 9 projects slightly forward from the blade 1 a of the die 1.

The stripper 10 has a push pin 11
The punch 6 is driven toward the punch after the punch 6 is driven in by a driving means (not shown) provided with a sliding member 12 and the like.

As shown in FIGS. 6 and 7, the punch 6 has an oval blade portion 6a formed by cutting two side surfaces of an outer peripheral portion of a nut material A to form an oval shape. Oval hole 6 to allow the inserted nut material
b. Further, an extraction hole 5b for the nut material A is formed behind the punch holder 5 via a communication hole 5a communicating with the hole 6b.

The blade thickness X on the front surface of the blade 1a in the die 1 is equal to the blade thickness Y on the front surface of the blade 6a in the punch 6a.
The die 1 is formed so that the clearance angle of the inclined front surface 1c following the blade portion 1a of the die 1 is smaller than the clearance angle of the inclined front surface 6c following the blade portion 6a of the punch 6a.

Next, the operation of the trimmer configured as described above will be described.

When the ram 4 advances from the retracted position, the nut material A is transferred between the die 1 and the punch 6 from one side of the machine base via a material transfer means (not shown) as appropriate. Is driven into the die 1 by the punch 6.

In this case, a guide pin 9 is inserted into the through hole of the nut material A, and the nut material A is driven into the die 1 by being guided by the pin 9. And the above die 1
The blade thickness X of the blade 1a in the punch 6a
a is thinner than the blade thickness Y
First, the die side portion of the outer peripheral portion is the die 1
Is cut into the hole 1b of the die 1 while being cut into an oval shape by the blade 1a.

When the end of the nut material A on the die side is driven into the hole 1b of the die 1 for a predetermined length, the material A
Is pressed against the stripper 10 to prevent the material A from being pushed into the die 1. Thereby, the die side of the nut material A is cut by a predetermined length as shown in FIG. Subsequently, the punch side of the outer peripheral portion of the nut material A is cut by the blade portion 6a of the punch 6.

In this case, as shown in FIG. 9, in order to prevent breakage due to collision between the die 1 and the punch 6, the advancing of the punch 6 is stopped immediately before the cutting waste a is separated from the outer peripheral portion of the nut material A. You. Then, at the moment when the advance of the punch 6 stops, the stripper 10 advances to the punch side and pushes out the nut material A to the punch side. As a result, the cutting waste a is cut off from the outer peripheral portion of the material and separated, and the trimmed embedding nut N is inserted into the communication hole 5 a of the punch holder 5.
And it is taken out outside through the taking-out hole 5b.

The separated cutting chips a are moved to the front of the die by the retraction of the punch 6 during the forward movement of the stripper 10 to the punch side, and are dropped at the front position of the die when the stripper is retreated. Can be Thereafter, the above operation is repeated so that the nut material A
Are trimmed flat to form an embedding nut N having an oval cross section.

In the above embodiment, the trimmer for forming the outer peripheral portion of the embedding nut having an oval cross section has been described. However, the outer peripheral shape of the embedding nut is not limited to the oval cross section. Any shape such as a hexagonal cross section may be used. Further, the rod-shaped member is not limited to the embedding nut at all. For example, the outer peripheral portion of a rod-shaped member such as a special bolt whose head height is set longer than a normal bolt is formed in a predetermined shape. Needless to say, the present invention can be applied to such a case.

Further, when the nut material A is formed by forging with a forging machine, the above-mentioned trimmer can be integrated into the forging machine.
With this configuration, it becomes possible to consistently manufacture the embedding nut N having an oval cross section from a wire, for example.

[0024]

As described above, according to the present invention, apart from the blade portion 6a provided on the trimmer punch 6, the outer peripheral portion on the die side is cut into a predetermined shape by press-fitting the round bar-shaped material A into the trimmer die 1. Since the blade portion 1a and the hole portion 1b that allows a predetermined amount of insertion of the cut outer peripheral portion are provided, both the blade portion 6a of the trimmer punch 6 and the blade portion 1a of the die 1 form the outer periphery of the round bar-shaped material A. The part can be cut. As a result, even in the case of a round bar-shaped material requiring a long cutting stroke, the outer peripheral portion can be easily and quickly formed into a predetermined shape by trimming without performing cutting by a milling machine, thereby improving productivity. Can be achieved.

Further, the blade portion 1a of the trimmer die 1
Since the blade thickness X on the front surface is formed thinner than the blade thickness Y on the front surface of the blade portion 6a of the trimmer punch 6a, the hole of the die 1 is first cut while the blade portion 1a of the die 1 cuts the outer peripheral portion of the round bar-shaped material A on the die side. Driving a predetermined amount into the part 1b,
The remaining outer peripheral portion of the round bar-shaped material A on the punch side can be cut by the blade portion 6a of the punch 6. This makes it possible to accurately set the respective cutting lengths of the die and the punch when cutting both the die 1 and the punch 6 by a predetermined length.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a trimmer according to the present invention.

FIG. 2 is a side view of a nut material.

FIG. 3 is a side view of an embedding nut.

FIG. 4 is a front view of a tree dice.

FIG. 5 is a sectional view taken along the line AA of FIG. 4;

FIG. 6 is a front view of the trimmer punch.

FIG. 7 is a sectional view taken along the line II in FIG. 6;

FIG. 8 is an explanatory view showing a state in which a trimmer punch is being driven.

FIG. 9 is an explanatory diagram showing a state where the driving of the trimmer punch has been completed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Trimmer dice 1a Blade part 2 Machine base 6 Trimmer punch 6a Blade part 10 Stripper (compression member) A Nut material (round bar-shaped material) a Cutting waste

Claims (2)

[Claims] 1. A trimmer die 1 provided on a machine base 4.
And moves back and forth with respect to the die 1 in front of the die 1,
A streamer punch 6 having a blade portion 6a for cutting the outer peripheral portion into a predetermined shape by press-fitting the outer peripheral portion of the round bar-shaped material A;
And a pressing member 10 for pressing the raw material A cut by the punch 6 to separate the cutting chips a from the outer peripheral portion thereof. An outer periphery of a rod-shaped member, comprising: a blade portion (6a) for cutting an outer peripheral portion of the die side into a predetermined shape by press-fitting (A); and a hole (6b) for allowing a predetermined amount of insertion of the cut outer peripheral portion. Trimmer for forming parts. 2. The outer circumference of the bar-shaped member according to claim 1, wherein the blade thickness X on the front surface of the blade portion 1a of the trimmer die 1 is formed smaller than the blade thickness Y on the front surface of the blade portion 6a of the trimmer punch 6a. Trimmer for forming parts.