JPS6229142Y2 - - Google Patents

Description

[Detailed description of the invention] This invention punches out a plate material, especially a thin metal plate, a sheet of polymeric material, a film, etc., using a punch and a die, and then pushes the punched product down with the punch to position it at the bottom of the punching hole of the die. The object of the present invention is to provide a plate material punching/insertion device that reliably inserts a plate material into a holding member.

Conventionally, when punching a plate material with a punch and die and inserting the punched product into a holding member located at the bottom of the die, as shown in FIGS. 1 to 4,
A punch 1 having a cutting edge portion 1a and a tapered relief portion 1b, a cutting edge hole 2a and a relief hole larger than the cutting edge hole 2a to prevent interference with the punch 1 when the punch 1 is inserted. 2b, and punch the plate material 3 on the die 2 with the punch 1.
The cutting edge part 1a of the die 2 and the cutting edge hole 2a of the die 2 are used to punch out a predetermined shape, and the punched product 3' is pushed with the punch 1 to form the holding member 4 located at the lower part of the escape hole 2b of the die 2. It is inserted into the insertion hole 4a.

However, with such a conventional device, when a plate material 3 is punched as shown in FIG. 1, due to eccentricity between the punch 1 and the cutting edge hole 2a, or deterioration of sharpness, etc. At the same time, they are no longer cut, and a part A that is cut first and a part B that is cut later occur, and the part A that is cut first is the part 9 that is cut later.
When the punch 1 descends further and the part B that will be cut later is cut, the part A that was cut first falls further and the product 3' tilts significantly, as shown in Figure 2. If, in this state, the punch 1 is lowered to push the product 3' and insert it into the holding member 4, the product 3' will be inserted into the insertion hole 4a in a bent state as shown in FIG. 4, and the product 3' will be considered a defective product. becomes.

In addition, when punching two sheets 3 stacked, the lower product 3', that is, the one to be cut first, is already in the state shown in FIG. 2 when the upper product 3' is in the state shown in FIG. As a result, the conditions are worse than when punching one sheet, and the lower product is turned inside out and inserted into the insertion hole 4.
It may also happen that it is inserted into a.

Furthermore, as shown in FIG. 5, if the small hole 4b passes through the insertion hole 4a of the holding member 4, the product 3' will be caught in the small hole 4b, and the punch 1
When pressed from above, the product 3' cannot slide in the direction of arrow A, resulting in a worse appearance of the product 3'.

The present invention solves these conventional problems, and the plate material punching and inserting device according to the present invention will be described below with reference to the drawings of FIGS. 6 to 9.

As shown in FIGS. 6 to 9, the plate material punching and insertion device according to the present invention has almost the same structure as the conventional plate material punching and insertion device explained in FIGS. 1 to 5, and in the present invention, The relief hole 2b of the die 2 is formed by a member 5 that is softer than the cutting edge portion 2c and the cutting edge portion 1a of the punch 1. For example, the cutting edge 1a of the punch 1 and the cutting edge 2c of the die 2 are made of hardened tool steel, and when the plate material 3 is metal, the member 5 may be made of unhardened steel, mild steel, or brass. Further, when the plate material 3 is made of a polymeric material, the member 5 may also be made of a polymeric material.

Further, after the member 5 is fixed to the die 2 by press-fitting or the like, the cutting edge hole 2a and escape hole 2b may be finished to have the same diameter by grinding or the like.

In the plate material punching and inserting device of the present invention having the above configuration, since the component of the relief hole 2b is softer than the punch 1, even if the guiding precision during the descent of the punch 1 is poor and the punch 1 comes into contact with the member 5, the punch 1 will not be damaged. Also, as shown in Figure 6, as in the conventional case, there is a part A that can be cut first and a part B that can be cut later.
Even if a break occurs, the part A that is cut first comes into contact with the relief hole 2b, so it does not descend as freely as before, and even when the part B that breaks later is cut, as shown in Figure 7. The inclination of product 3' is very slight. Even if the inclination becomes large and the product 3' separates from the escape hole 2b in a part, it will strongly bite into the escape hole 2b in other parts, so it will not freely fall inside the escape hole 2b as in the conventional case. , it stops in a tilted position. In other words, when the punch 1 is further lowered and the product 3' is inserted into the insertion hole 4a of the holding member 4, the product 3' can be inserted reliably without any inconveniences as in the conventional case.

As described above, according to the plate material punching and inserting device of the present invention, the following effects can be obtained.

(1) When punching thin plate materials, it is necessary to narrow the clearance between the punch and the die, and high precision is naturally required for guiding the punch, but in this invention, the escape hole is made of a soft material. Therefore, even if the punch comes into contact with the escape hole, the punch will not be damaged in any way, and there is no need to increase the guide accuracy of the punch, and the structure can be made at low cost.

(2) By making the dimensions of the escape hole almost the same as the dimensions of the cutting edge hole, it is possible to create not only materials with large elongation but also materials with small elongation, that is, materials in which the dimensions of the punched product are only slightly larger than the dimensions of the cutting edge. Even if the die is inserted into the die, the punched product can be guided by sufficiently engaging the escape hole, so that the punched product will not freely fall inside the die, and thereby the product can be inserted into the holding member reliably. Moreover, the fifth
No problem will arise even if the holding member is as shown in the figure.

[Brief explanation of the drawing]

1 to 4 are cross-sectional views showing the operation of a conventional sheet material punching and insertion device, FIG. 5 is a sectional view showing the main parts of another conventional sheet material punching and insertion device, and FIGS. FIG. 3 is a sectional view showing the operation of the plate material punching and inserting device according to an embodiment of the invention. 1... Punch, 2... Die, 2a... Cutting edge hole, 2b... Relief hole, 2c... Cutting edge portion, 3...
Plate material, 3'... product, 4... holding member.

Claims (1)

[Scope of utility model registration request] In a plate material punching/insertion device that punches a plate material using a punch and a die, presses the punched product with the punch, and inserts it into a holding member located below the die, the punching hole of the die is connected to the cutting edge hole. and an escape hole finished to approximately the same dimensions as the die, and the material of the escape hole is softer than the material of the die and the cutting edge of the punch, and the product is punched with the cutting edge hole of the die. A plate material punching/insertion device configured to guide a plate material to the holding member in a state in which the plate material is bitten in the escape hole.