JPH0618657Y2 - Mold equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a mold device, and more specifically, when a press mold is composed of upper and lower molds, a through hole is provided in the upper mold. A mold apparatus capable of engraving a predetermined identification code for each lot of products on a work in a thin plate shape by detachably fitting a holder to which a marking member is attached via the through hole. .

[Background of the Invention] Generally, when a thin plate-shaped work is formed into a desired shape, press working is widely performed. For example, an outer plate member that constitutes an automobile body is usually processed through the following steps.

First, a predetermined number of blanks are cut from a thin plate material obtained by rolling an aluminum alloy, a steel plate, or the like in a roll shape. Next, after pressing a predetermined number of blank materials with a die device to form a curved surface corresponding to the outer plate shape of the vehicle body, the blank material after the press work is completed using a trimming die device. Cut off unnecessary parts from. Further, the blank material from which unnecessary parts are cut is subjected to punching or bending of the outer edge portion through a punching die device or a bending die device to finally obtain a desired outer plate member.

Here, a plurality of the above-mentioned respective mold devices are arranged, and the cut blank material is processed as a lot by a predetermined mold device. In this case, it has been conventionally practiced to stamp a blank material for each lot in order to easily determine the quality of the die device and the outer plate member processed by the die device. The mold apparatus includes, for example, a lower mold as a fixed mold and an upper mold as a movable mold, and a member for marking a blank material is provided so as to face a work press surface below the upper mold. .

A mold apparatus of this type according to the prior art is shown in FIG. That is, reference numeral 2 indicates an upper die fixed to the ram 4, and the upper die 2 faces the lower die 6. The marking member 8 is exposed from the pressing surface of the upper mold 2 toward the lower mold 6. As is clear from the figure, the marking member 8 is housed in a relatively shallow groove provided in the upper mold.

Therefore, the upper die 2 is raised, the blank material W is placed on the lower die 6, and then the upper die 2 is displaced downward, whereby the press working and the marking are performed simultaneously. By the way, the marking member 8 must be replaced in order to stamp on a blank material of a lot different from the above.

However, in this conventional technique, since the marking member 8 is attached to the groove provided in the lower portion of the upper mold 2, the upper mold 2 is temporarily stopped in the state of being displaced upward from the lower mold 6, and the worker is directed upward. The marking member 8 must be replaced in this state.
Therefore, the exchanging work of the marking member 8 becomes complicated, and since the press working is temporarily stopped, the efficiency of the press working is reduced.

[Object of the Invention] The present invention has been made in order to overcome the above-mentioned inconvenience, and includes a through hole extending vertically in an upper mold and a holder detachably fitted from the upper portion of the through hole. And a marking member that is detachably locked to the lower part of the holder via a locking member, and the holder to which the marking member is attached is taken out from the upper part of the upper mold to replace the marking member. It is possible. Therefore, the marking member can be easily replaced not only when the upper die is displaced upward, but also when the upper die is placed on the lower die, and therefore the press work is interrupted for a long time. It is an object of the present invention to provide a die device that can achieve further efficiency of press working without doing so.

[Means for Achieving the Purpose] In order to achieve the above-mentioned object, the present invention is a mold device for simultaneously performing press working and marking on a thin plate-shaped work, and an image is formed on an upper mold supported by a ram. A holder having a through hole extending from the upper surface to the pressing surface and a flange portion, the holder being inserted into the through hole from above and the flange portion engaging with a step portion formed in the upper mold; An elastic member, one end of which abuts on the ram and the other end of which abuts on the flange portion, and a marking member detachably attached to the press surface side tip portion of the holder.

[Embodiments] Next, preferred embodiments of the mold apparatus according to the present invention will be given and described in detail below with reference to the accompanying drawings.

In FIG. 2, reference numeral 10 denotes a mold device according to the present invention, and the mold device 10 basically comprises a lower mold 12 and an upper mold 14.

First, the punch 16 forming the lower die 12 is placed on the bolster 18. The punch 16 includes a flat base portion 20 formed in a lower portion thereof, and from the base portion 20, a press surface 22 having a predetermined shape is formed at the tip end thereof to bulge vertically upward in the drawing. It The press surface 22 is formed corresponding to the shape of a molded product, for example, an automobile body.

Next, a blank holder 24 is attached to the outer peripheral portion of the punch 16.
a and 24b are provided, and the blank holders 24a and 24b are positioned and held upward by a predetermined distance from the base portion 20 via cushion pins 26a and 26b. in this case,
Beads 28a, 28b are provided on the upper surfaces of the blank holders 24a, 24b.
Are integrally formed with the beads 28a, 28b.
A blank 30 is placed on top.

On the other hand, the upper mold 14 includes a ram 31, and the die 33 is attached to the ram 31. A press surface 32 is formed in the lower part of the die 33, and the press surface 32 corresponds to the shape of the press surface 22 of the lower die 12. Bead grooves 34a, 34b are formed on an extension of the pressing surface 32, and the bead grooves 34a, 34b are formed.
The beads 28a and 28b are fitted to the. In addition, the upper mold 14 is defined with spaces 36a to 36c for reducing the weight of the mold itself.

Further, in the upper part of the upper mold 14, there are recesses spaced apart from each other by a predetermined distance.
38a and 38b are provided, and a groove 39 is formed in the recess 38a. A hole 40 is bored through the recesses 38a and 38b. A through hole 42 is provided in the vertical direction from the pressing surface 32 to the recess 38a, and a holder 44 is detachably fitted in the through hole 42.

The holder 44 includes a main holder 46 and a substantially cylindrical sub-holder 48. The main holder 46 has a lot 50 and a large-diameter flange portion 52, and a pad 54, which is an elastic member made of urethane or the like, is placed on the flange portion 52. In fact, since the pad 54 is pressed by the ram 31, the holder 44 is always urged downward. The lot 50
A pin 56 is attached to the upper part of the pin 56, and the pin 56 engages with the groove 39 to prevent the holder 44 from rotating. A female screw hole 58 is provided in the lower part of the lot 50, and a screw 60 attached to one end of the sub-holder 48 is screwed into the female screw hole 58. This is to support the sub holder 48. A recess 62 is provided at the other end of the sub-holder 48, and a substantially columnar marking member 64 is inserted into the recess 62. A locking member 68 is attached to the sub-holder 48 via a screw 66 so that the vicinity of the tip portion is bent to generate an elastic force. The bent portion 68a of the locking member 68 engages the marking member 64 and elastically holds it. On the other hand, the stopper is directed from the hole 40 to the recess 38b.
70 is inserted, and the coil spring 72 is seated on the flange portion 70a provided at one end of the stopper 70. Therefore,
The stopper 70 is constantly pressed in the direction of arrow A by the elastic force of the coil spring 72. Therefore, the stopper 70
Achieves the function of preventing further upward displacement of the holder 44 when engaged with the flange portion 52.

The mold apparatus according to the present invention is basically constructed as described above. Next, its operation and effect will be described.

First, the blank holders 24a and 24b are positioned at predetermined positions with respect to the lower mold 12. Next, the blank material 30 is placed between the lower mold 12 and the upper mold 14, and the upper mold 14 is displaced downward. Therefore, the beads 28a and 28b are engaged with the bead groove portions 34a and 34b formed in the upper mold 14, and the blank material 30 is positioned. Then, when the upper mold 14 is further lowered, the blank holders 24a and 24b push down the cushion pins 26a and 26b, and the pressing surface 32 of the upper mold 14 and the pressing surface 22 of the lower mold perform drawing. At this time, the holder 44 puts the ram 31
Since the blank member 30 is urged downward by pressing 54, a predetermined identification symbol is marked on the blank material 30 by the marking member 64. After the drawing process and the marking are completed in this way, the upper die 14 is displaced upward, the blank material 30 is taken out, and the next blank material (not shown) is placed on the lower die 12.
Then, by repeating the above-mentioned steps, drawing processing and marking are sequentially performed on one lot of blank material. After the drawing process for each predetermined lot is completed, the marking member 64 is replaced to perform the drawing process for another lot. Therefore,
First, the ram 31 and the die 33 are separated from each other. At this time, since the marking member 64 is attached to the holder 44, the holder 44 is
Take out from the top of 33. That is, the stopper 70 is displaced in the opposite direction of the arrow A to a predetermined position against the elastic force of the coil spring 72, and the holder 44 is taken out. The marking member 64 is locked by a locking member 68. Therefore, when the locking member 68 is displaced in the direction of separating from the recess 62 of the sub holder 48 against the elastic force, the marking member 64 can be easily taken out. Next, after replacing the taken out marking member 64 with another marking member (not shown), the concave portion 62 of the sub-holder 48 is engaged, and then the holder 44 is fitted into the die 33 again. That is, the stopper 70 is displaced to a predetermined position in the direction opposite to the arrow A direction by a predetermined force against the elastic force of the coil spring 72, and then the holder 44 is inserted into the through hole 42. After that, when the lower portion of the flange portion 52 comes into contact with the bottom portion of the concave portion 38a and the positioning is performed, the force applied to the stopper 70 is released.
70 is displaced in the direction of arrow A by the elastic force of the coil sling 72. The stopper 70 prevents the holder 44 from coming off.

Further, in the present embodiment, the exchanging work of the marking member 64 is performed by taking out the holder 44, but it is also possible to replace the marking member 64 from the lower part of the die 33 with the holder 44 inserted in the upper mold 14.

Further, in this embodiment, the holder 44 is replaced with the sub-holder 48.
The sub-holder (not shown) in which the marking member is locked in advance can be replaced.

[Advantage of the Invention] As described above, according to the present invention, when the marking member is replaced,
It goes without saying that the two molds are separated from each other,
It is also possible to take out the holder with the upper mold and the lower mold joined to each other and easily perform the replacement work. As a result, the marking member can be replaced without interrupting the press working for a long time. In the end, the effect that the efficiency of press working can be achieved can be obtained.

Although the present invention has been described with reference to the preferred embodiment, the present invention is not limited to this embodiment.
It goes without saying that various improvements and design changes can be made without departing from the scope of the present invention.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional explanatory view of a mold device according to the prior art, FIG. 2 is a sectional side view of the mold device according to the present invention, and FIG. FIG. 4 and FIG. 4 are exploded perspective views of a holder fitted to the mold device according to the present invention. 10 ... Mold device, 12 ... Lower mold 14 ... Upper mold, 30 ... Blank material 42 ... Through hole, 44 ... Holder 64 ... Stamping member, 68 ... Locking member

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Hiroya Sato Inventor Shin-Sayama 1-10-1 Sayama City, Saitama Prefecture Inside Honda Engineering Co., Ltd. (72) Inventor Kiyoshi Takishima 1-10-1 Shin-Sayama City, Sayama City, Saitama Prefecture Inside Engineering Co., Ltd. (72) Inventor Setsuko Miyano 1-10-1 Shin-Sayama, Sayama City, Saitama Prefecture Inside Honda Engineering Co., Ltd. (56) References: Actual Development Sho 59-16725 (JP, U)

Claims (1)

[Scope of utility model registration request] 1. A mold apparatus for simultaneously performing press working and stamping on a thin plate-like work, a through hole defined by an upper mold supported by a ram and extending from an upper surface to a press surface, and a flange portion. A holder that is inserted into the through hole from above and whose flange portion engages with a step portion formed in the upper mold; one end abuts on the ram; the other end abuts on the flange portion. A mold apparatus comprising: an elastic member in contact with the holder; and a marking member detachably attached to the tip of the holder on the press surface side.