JPH0280134A - Method and apparatus for pressing holed member - Google Patents

Abstract

PURPOSE:To manufacture a holed member having a good sheared section by half-blanking a plate stock to form a projecting contour, then, piercing the member which is not separated yet from the plate stock, then, punching it and separating the holed member from the plate stock. CONSTITUTION:The plate stock 21 is carried progressively to press a member 75 having a through hole 73. Consequently, the plate stock 21 is half-blanked by a punch 37 and a die 39 to form a projecting contour 55. Then, a through hole 73 is formed by a punch 45 at a half-blanked part. Thereafter, the holed member 75 is blanked by a punch 59 and a die 61. By this method, a holed member having a good sheared section can be manufactured.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention is a method for manufacturing a perforated member in which through-holes are formed by punching and punching a progressively fed plate material. The present invention relates to a method for pressing a hole member and an apparatus therefor.

[Prior Art and Problems to be Solved] FIGS. 3 and 4 show a perforated member 15 having a through hole 13 at a position close to the outer shell 11.

Generally, the holed member 15 having such a shape is manufactured by fine blanking, which involves simultaneous machining of the inner and outer diameters.

However, the distance l from the inner circumference of the through hole 13 to the outer shell 11 is very close to the outer shell 11, for example, the distance l from the inner circumference of the through hole 13 is
When processing the perforated member 15, which has a smaller plate thickness than the plate 5, by such a processing method, there is a problem that an extremely thin portion is formed in the mold, resulting in insufficient strength.

When processing by fine blanking, there are problems in that the press machine and the mold are very expensive, and the life of the mold is short.

The present invention solves the above-mentioned problems, and aims to provide a method and apparatus for press working of a member with holes that can easily and reliably manufacture a member with holes through progressive processing. .

[Means for Solving the Problems] The method for pressing a member with holes according to claim 1 includes punching a progressively fed plate material to form a through hole and punching to form an external shape. In a press working method for a perforated member in which a perforated member having a through hole is formed by processing, the plate material is subjected to a half punching process in which the punch is stopped midway without inserting the punch into the die to form a convex outer shell. After this half punching process, a hole punching process is performed to form a through hole in the member that is not separated from the plate material, and after this punching process, the hole punching process is performed to form a through hole. The method includes a punching step of punching the plate material and separating the perforated member from the plate material.

A second aspect of the present invention provides a method for pressing a member with a hole according to the first aspect, in which the hole punching is performed in a state where the convex outer contour of the half punched member is restrained.

The pressing apparatus for a member with holes according to claim 3 performs punching for forming a through hole and punching for forming an external shape on the progressively fed plate material to form the through hole. In the press processing apparatus for a holed member for manufacturing a holed member, a half punching section performs a half punching process on the plate material by stopping the punch midway through the die without inserting it into the die to form a convex outer shell; It is placed downstream of this half-blanking part,
A punching part that punches a hole in a member that is not separated from the plate material to form a through hole; and a punching part that is arranged downstream of this punching part and punches the plate material to separate the holed member from the plate material. It has a punched part.

[For production]

In the press working method for a perforated member according to claim 1, first, a half-blanking process is performed on the plate material by stopping the punch in the middle without inserting the punch into the die to form a convex outer shell, and after this, the punch is not separated from the plate material. A punching process is performed on the perforated member in the state to form a through hole, and thereafter, a punching process is performed on the plate material to separate the perforated member from the plate material.

Further, in the method for pressing a holed member according to claim 2, in claim 1, the hole punching is performed in a state where the convex outer contour of the half punched holed member is restrained.

In the press processing apparatus for a perforated member according to claim 3, first, in the half-blanking section, a half-blanking process is performed on the plate material by stopping the punch in the middle without inserting the punch into the die to form a convex outer shell. After that, in the punching section, the holed member that is not separated from the plate material is punched to form a through hole,
Thereafter, in the punching section, the plate material is punched to separate the perforated member from the plate material.

〔Example〕

Hereinafter, details of the present invention will be explained using the drawings.

FIG. 1 shows an embodiment of a press working apparatus for a perforated member according to the present invention, and FIG. 2 shows a plate material progressively processed by this press working apparatus for a perforated member.

In FIG. 1, reference numeral 21 indicates a plate material that is progressively fed.A bunch holder 23 is arranged above this plate material 21, and a die holder 25 is arranged below.

In this embodiment, a half-blanking portion 27. Hole punching section 29 and punching section 3
1 are formed in order, and a half punched part 27 and a punched part 2 are formed.
9, and between the punched part 29 and the punched part 31
An idle portion 33.35 is formed between the two.

The half-blanking processing section 27 has a punch 37 whose upper end is fixed to the punch holder 23 and a die 39 whose lower end is fixed to the die holder 25. Inside the die 39, a biasing means 41 such as a spring is installed. A receiving member 43 is inserted which is urged upward by.

The punching section 29 includes a punch 45 whose upper end is fixed to the punch holder 23 and a die 47 whose lower end is fixed to the die holder 25. Inside the die 47, a biasing means 49 such as a spring is provided. A pin 51 is inserted which is biased upward by.

Furthermore, a restraining member 57 is fixed to the upper end of the die 47 for restraining the convex outer shell 55 of the semi-finished holed member 53 formed by the half-blanking part 27.

The punching section 31 includes a punch 59 whose upper end is fixed to the punch holder 23 and a die 61 whose lower end is fixed to the die holder 25.

A stripper 63 is arranged above the plate 21, a punch 37°4559 is inserted through the stripper 63, and is biased toward the plate 21 by a biasing member 65 such as a spring.

A convex portion 67 is formed on the stripper 63 at the position of the punched portion 29 .

Note that the die 39 of the half punching section 27 and the hole punching section 29
between the die 47 and the die 4 of the punching part 29
7 and the die 61 of the punching part 31, there is a receiving member 6.
9.71 are inserted, and these receiving members 69.71 are fixed to the die holder 25.

In the press processing apparatus for a member with a hole configured as described above, in the half-blanking section 27, a half-blanking process is performed in which the punch 37 is stopped halfway without inserting it into the die 39, and the plate material 21 is formed into a convex shape. A shell 55 is formed.

In this half-blanking process, the clearance between the punch 37 and the die 39 can be set to zero, or the dimensions of the die 39 can be set smaller than the dimensions of the punch 37, and due to the effect of hydrostatic pressure,
The convex outer shell 55 allows a 100% shear surface.

Thereafter, the plate material 21 is sequentially conveyed through the idle part 33 to the hole punching part 29, and in the hole punching part 29, a punch 45 is used to punch holes in the semi-finished hole member 53 that is not separated from the plate material 21. A punching process is performed to form a through hole 73.

Note that this hole punching process is performed by pressing the perforated member 53 toward the restraining member 57 side of the die 47 by the convex portion 67 of the stripper 63, inserting the convex outer shell 55 of the perforated member 53 into the restraining member 57, and removing the convex portion. This is carried out with the shaped outer shell 55 being securely restrained by the restraining member 57.

Thereafter, the plate material 21 is sequentially conveyed through the idle part 35 to the punching part 31, where the plate material 21 is punched with a punch 59, and the perforated member 75 is separated from the plate material 21. Ru.

Therefore, in the press processing apparatus for a member with holes configured as described above, the apparatus is attached to the plate material 21 and the punch 37 is attached to the die 3.
A half-blanking part 27 that performs a half-blanking process to form a convex outer shell 55 without inserting the plate into the plate material 21 and forming a convex outer shell 55; A punching section 29 punches a hole in the hole member 53 to form a through hole 73; Since the punching part 31 is separated, the semi-finished holed member 53 is connected to the plate material 21 until the final step of punching, and this makes it easy to form the holed member 75 by progressive processing. , it becomes possible to manufacture reliably.

Further, in the press processing apparatus for a holed member configured as described above, the hole punching process is performed while the convex outer shell 55 of the half-finished holed member 53 is restrained. Even if the position of the through hole 73 of the perforated member 75 approaches the outer shell, for example, as shown in FIG. In addition, it is possible to suppress droop to a very small level.

Also, the clearance between the punch 45 and die 47 is set to 0.3~
If set to 0.02 mm, a 100% shear surface is also possible.

The method for pressing a member with a hole according to the present invention includes a half-blanking process in which the punch 37 is stopped in the middle without inserting the punch 37 into the die 39 to form the convex outer shell 55; After this half-blanking process, the plate material 21 and the unseparated holed member 53 are punched to form through-holes 73.
The structure consists of a punching process to form a hole, and a punching process to punch out the plate material 21 and separate the holed member 75 from the plate material 21 after the punching process. The perforated member 53 of the product is the plate material 21
This makes it possible to easily manufacture the perforated member 75 by progressive processing.

Furthermore, in the method for pressing a holed member of the present invention, the hole punching process is performed in a state where the convex outer shell 55 of the holed member 53, which is a half-finished semi-finished product, is restrained. Even when the position of the through hole 73 of the punch 75 approaches the outer circumference, bending of the punch 45 can be prevented, a good shearing surface can be obtained, and furthermore, it is possible to suppress droop to a very small extent.

In addition, in the embodiment described above, an example was explained in which a circular through hole 73 was formed in the perforated member 75, but the present invention is not limited to such an embodiment, and for example,
Of course, the through-hole may have an irregular shape such as a square shape.

[Effects of the Invention] As described above, in the method for pressing a member with a hole according to claim 1, a convex outer shell is formed by performing half punching on a plate material without inserting a punch into the die and stopping the punch midway. A half-blanking process; After this half-blanking process, a hole-punching process is performed to form a through hole in a member that is not separated from the plate; After this hole-punching process, a punching process is performed on the plate Since the punching process consists of a punching process in which the perforated member is separated from the plate material, the perforated member is connected to the plate material until the final punching process, and the outer part and the hole part are separated by progressive processing. It is possible to easily and reliably manufacture a perforated member with a short distance and a good shear surface.

In the half punched portion of the outer shell, a 100% shearing surface can be achieved by setting the die size equal to or smaller than the bunch size.

Further, in the method for pressing a perforated member according to claim 2, the hole punching process is performed with the convex outer contour of the half-punched member being restrained, so that the position of the through hole of the perforated member is adjusted. Prevents the punch from bending even when approaching the outer shell,
A good shear surface can be obtained, and droop can also be suppressed to a very small level.

Furthermore, in the press processing apparatus for a member with holes according to claim 3, the apparatus includes a half-blanking section that performs a half-blanking process on the plate material, stopping the punch midway through without inserting the punch into the die to form a convex outer shell; A punching part is arranged downstream of this half punching part and punches a hole in a holed member that is not separated from the plate material to form a through hole; Since it consists of a punching section that performs punching on the plate material and separates the perforated member from the plate material, the perforated member remains connected to the plate material until the final punching process. The distance between the outer shell part and the hole part is small and the holed part has a good shear surface, which is difficult to do with the fine blanking process which requires a special press.
V& has the advantage that it can be manufactured using a general-purpose press.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of a press working apparatus for a perforated member according to the present invention. FIG. 2 is a top view showing the processed shape formed on the progressively fed plate material. FIG. 3 is a top view showing an example of a perforated member. FIG. 4 is a longitudinal sectional view of FIG. 3. [Explanation of symbols of main parts] 21... Plate material 27... Half punching section 29... Hole punching section 31... Punching section 37... Punch 39... Die 55... - Convex outer shell 73...through hole.

Claims (3)

[Claims] (1) A perforated member in which a through hole is formed is manufactured by punching a progressively fed plate material to form a through hole and punching to form an external shape. In the press working method for a member, a half punching process is performed on the plate material to form a convex outline by half punching the plate material without inserting a punch into the die, and after this half punching process, the plate material and A punching process in which a hole is punched in an unseparated member to form a through hole, and a punching process in which the plate material is punched after the hole punching process to separate the holed member from the plate material. A method for pressing a member with holes, the method comprising: (2) The method for pressing a member with a hole according to claim 1, wherein the punching is performed while the convex outer contour of the half-blanked member is restrained. (3) Punching the progressively fed plate materials to form through holes and punching to form the external shape to produce a perforated member in which through holes are formed. In the press processing device for parts, a half-blanking part is formed on the plate material to form a convex outline by half-blanking the plate material without inserting a punch into the die, and the half-blanking part is arranged downstream of the half-blanking part. a punching section that punches a hole in a member that is not separated from the plate material to form a through hole; 1. A press processing device for a member with holes, characterized in that it has a punching section for separating the parts.