JPH0442112B2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a mold integrally comprising an upper arm portion having a punch mounting hole at the tip and a lower arm portion having a die mounting hole at the tip. The present invention relates to a holder, and more particularly to a mold holder whose upper arm and lower arm are made of aluminum or an alloy thereof.

[Technical background of the invention and its problems]

In general, a C-shaped mold holder called a swan neck holder is used to hold punch and die molds used for punching metal plates and the like on the same support member. This mold holder is
Conventionally, those made of wear-resistant metal materials such as FCD45 (class 2 spheroidal graphite cast iron) have been used. However, since this type of material is heavy, it is extremely inconvenient to handle it during setup and other operations.

In order to solve this problem, a casting method has been proposed in which aluminum or aluminum alloy castings such as A-2C are used, and only the parts where the punch and die are attached, where strength is required, are reinforced by inserting iron material. (Patent Application No. 58-245050) However, in the mold holder obtained by such a casting method, everything except the mold guide part is made of aluminum, so when performing machining after casting, the machine The chips scattered on the table got stuck in the aluminum holder and caused damage, making it difficult to maintain accuracy. Furthermore, when attaching the mold holder to a press machine, the lower arm made of aluminum must be directly tightened with bolts or the like, so the tightening force cannot be increased very much.

[Purpose of the invention]

The present invention was made in view of such conventional problems, and an object of the present invention is to provide a mold holder that is mainly made of aluminum and has strength.

[Summary of the invention]

In order to achieve the above object, the present invention provides an upper arm having a punch mounting hole at its tip for mounting a punch, and a lower arm having a die mounting hole at its tip for mounting a die that cooperates with the punch. The upper arm and the lower arm are made of aluminum or an alloy thereof into a mold holder, and both upper and lower ends of the reinforcing iron member provided on the lower arm are lowered. The reinforcing iron member is provided substantially on the same plane as the upper and lower surfaces of the arm, and receives the tightening force in the vertical direction when the lower arm is attached to a press machine.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be explained in detail based on the drawings. FIG. 1 is a partially cutaway side view of the intended aluminum mold holder. The mold holder 1 consists of an upper arm part 3, a lower arm part 5, and a body part 7, and has a C-shape called a swan neck shape. A punch 9 and a die 11 are attached to the distal ends of the upper arm 3 and lower arm 5 on the same vertical line.

2 to 4 show a mold 13 for casting the mold holder 1. FIG. This mold 13 is a sand mold formed by a normal molding method. The core 15 shown by diagonal lines in the figure is made in advance from a wear-resistant metal material such as FCD45 spheroidal graphite cast iron, and placed in the mold 13 as shown. The position corresponds to the mounting portion of the punch 9 and die 11 of the mold holder 1. The core 15 has an engaging uneven portion on its outer peripheral surface, that is,
A number of circumferential grooves 17 are provided. This groove 17 is provided to prevent the core 15 from separating from the main body of the cast product after casting. The core 15 is provided with a hole 19 for discharging scrap during sheet metal punching.

In the center of the mold 13 at a position corresponding to the lower arm 5 of the mold holder 1, a reinforcing iron plate 21 is placed with its parallelism and height kept constant by two bolts 23. There is. The lower surfaces of these two reinforcing iron plates 21 are made flush with the lower surface of the lower arm portion 5 of the mold holder 1.

A wooden core 27 is sandwiched between the two reinforcing iron plates 21 and forms a slot 25 through which a bolt for fixing the holder 1 to a press machine is passed. On top of that, there are an upper arm part 3 and a lower arm part 5 of the holder 1.
A space 29 for the processing material to be formed between
A core 31 forming a core 31 is placed. Furthermore, there is a holder 1 to be formed on the upper arm portion 3 of the holder 1.
A core 35 is placed to form a slot 33 through which a tool such as a wrench passes when tightening bolts to secure the press to the press.

Casting is performed by injecting a molten aluminum alloy such as A-2C through the injection port 37 into the mold 13 shown in FIGS. 2 to 4 formed as described above.
FIG. 5 is a side view of the cast product taken out from the mold 13 after casting, with the core 15 embedded in the tips of the upper arm 3 and lower arm 5, and the punch and die parts connected. It's summery. Further, a reinforcing steel plate 21 is embedded in the lower arm portion 5, and the cores 27, 3
When 1 and 35 are removed, slot portions 25 and 33 and a space 29 are completed, and the upper and lower surfaces of reinforcing iron plate 21 appear on the upper and lower surfaces of lower arm portion 5, respectively.

Therefore, this connecting portion (the shaded portion in the figure) is cut off by cutting to separate the upper arm portion 3 and the lower arm portion 5. In this embodiment, the mounting portion of the die block 39 is also machined at the same time.

FIG. 6 shows a mold holder 1 with a die block 39 assembled and equipped with punch and die mounting holes 41 and 43.
FIG. 3 is a side view showing the completed state. dive block 3
9 has its outer shape machined in advance and is assembled to the machined portion described above. In addition, punch 9,
It is preferable that the mounting holes 41 and 43 of the die 11 be subjected to final processing. Further, the inner surfaces of the punch die mounting holes 41 and 43 are burnished.

When, for example, a tightening bolt is inserted into the slot portion 25 of the lower arm portion 5 of the mold holder 1 manufactured as described above and the lower arm portion 5 is tightened and fixed to a press machine, the tightening bolt is inserted in the vertical direction. Since the tightening force is received by the reinforcing steel plate 21, the lower arm 5 will not be deformed even though it is made of aluminum or its alloy, so it can be firmly tightened and fixed. .

〔Effect of the invention〕

As can be understood from the description of the embodiments described above, the present invention basically provides an upper arm portion 3 having a punch attachment hole 41 at its tip for attaching a punch 9, and a die 11 that cooperates with the punch 9 attached thereto. The upper arm part 3 and the lower arm part 5 are made of aluminum or an alloy thereof, and are integrally formed with a lower arm part 5 having a die mounting hole 43 at its tip. The upper and lower ends of the reinforcing iron member 21 provided on the lower arm portion 5 are provided on the same plane as the upper and lower surfaces of the lower arm portion 5, so that the tightening force in the vertical direction when the lower arm portion 5 is attached to a press machine is reduced. The reinforcing iron member 21
This is the structure that will be received at.

As is clear from the above structure, in the present invention, since the upper arm 3 and lower arm 5 of the mold holder are made of aluminum or an alloy thereof, it is possible to reduce the weight of the mold holder. .

In the present invention, the lower arm portion 5 is provided with a reinforcing iron member 21, and both upper and lower ends of this iron member 21 are provided on substantially the same plane as both upper and lower surfaces of the lower arm portion 5, and the lower arm portion 5 is provided with a reinforcing iron member 21. This configuration is such that the iron member 21 receives the vertical tightening force when the arm portion 5 is attached to a press machine.

Therefore, even though the lower arm portion 5 is made of aluminum or its alloy, which is easily deformed, the lower arm portion 5 can be strongly tightened and fixed with, for example, bolts.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway front view of a mold holder, Fig. 2 is a sectional view of a medium mold used in an embodiment of the present invention, Fig. 3 is a sectional view taken along the - line in Fig. 5 is a front view of the cast product taken out from the mold, and FIG. 6 is a partially cutaway front view of the mold holder obtained by the above embodiment after finishing processing. 1... Mold holder, 3... Upper mold part, 5... Lower arm part, 7
...Body part, 9...Punch, 11...Die, 13...Mold,
15... Core, 21... Steel plate for reinforcement, 27, 31, 3
5...Middle child.

Claims (1)

[Claims] 1. An upper arm part 3 having a punch mounting hole 41 at its tip for mounting a punch 9 and a lower arm 5 having a die mounting hole 43 at its tip for mounting a die 11 that cooperates with the punch 9 are integrated. In addition, the upper arm part 3 and the lower arm part 5 are made into a mold holder made of aluminum or an alloy thereof, and both upper and lower ends of the reinforcing iron member 21 provided in the lower arm part 5 are lowered. A mold characterized in that it is provided on substantially the same plane as both upper and lower surfaces of the arm portion 5, and is configured such that the reinforcing iron member 21 receives the tightening force in the vertical direction when the lower arm portion 5 is attached to a press machine. holder.