JPH0730173Y2 - Flange forming equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a flange forming device for performing flange processing on a rear wheel house inner of an automobile body, for example.

[Prior Art] When a flange is formed on a rear wheel house inner of an automobile body by flange processing, a molded product formed by press processing or the like is set in a flange forming device,
A flange is formed on the molded product by this flange forming device.

FIG. 2 shows the left half of a conventional flange forming apparatus, in which 1 is a fixed lower die holder and 2 is an upper die holder which is vertically movable. A movable die 3 is provided on the upper surface of the lower die holder 1 so as to be movable in the arrow direction, and is urged by a spring 4 in the backward direction (arrow a). The moving die 3 is provided with a concave portion 5 having an upper opening, a male side molding portion 6 is provided at one end side of the moving die 3, and a lower die driver 7 having an inclined surface 7a is provided at the other end side thereof. There is. Further, a worker 8 is mounted inside the recess 5 of the moving die 3 so as to be movable with respect to the bottom surface thereof. A projecting portion 9 is provided on one side of the worker 8 so as to project in the direction of the male molding portion 6, and the male molding portion 6 is formed on the projecting portion 9.
A female side molding portion 10 is provided which abuts against. Further, an inclined surface 11 is formed on the other side of the worker 8,
The rod 12 is projected. The rod 12 penetrates the lower driver 7 and projects outwardly.
A spring 13 is interposed in a compressed state between the end of the lower driver and the lower driver 7. Therefore, the worker 8 is biased in the backward direction (arrow b) from the male side molding portion 10 by the spring 13, and the worker 8 is in contact with the lower die driver 7. Further, an upper mold driver 14 is provided on the upper mold 2 so as to project downward. This upper die driver 14 is provided with a cutout portion 15 for preventing interference with the rod 12, a sliding surface 16 sliding on the inclined surface 11 of the worker 8 on one side, and a sliding surface 16 on the other side. Sliding surfaces 17 that slide with the inclined surfaces 7a of the lower die driver 7 are provided so as to be inclined.

Then, as shown in FIG. 2, when a flange is formed on an object to be molded 18 such as a press-molded rear wheel house inner by flanging, the object to be molded 18 and a moving die 3 which are separated from each other. Intervenes with the worker 8. When the upper die 2 is lowered with the molding target 18 set, the upper die driver 14 is inserted between the lower die driver 7 and the worker 8 of the moving die 3. That is, the upper driver 14
The sliding surface 16 of the worker is joined to the inclined surface 11 of the worker 8, and the sliding surface 16 slides on the inclined surface 11 as the upper die driver 14 descends, so that the worker 8 resists the biasing force of the spring 13. Move in the forward direction (arrow c). As the lower die driver 14 descends, the sliding surface 17 of the upper die driver 14 is joined to the inclined surface 7a of the lower die driver 7, and when the upper die driver 14 descends, the sliding surface 17 becomes the inclined surface 7a. The lower die driver 7 is moved in a direction away from the worker 8 while sliding. Therefore, the moving die 3 integrated with the lower die driver 7 moves in the forward direction (arrow d) against the biasing force of the spring 4. In this way, when the moving die 3 and the worker 8 advance to each other, the molding object 18 interposed therebetween is sandwiched by the male molding part 6 and the female molding part 10, and a flange is formed on a part of the molding material 18. 19 will be molded. When the upper die holder 2 rises after the molding is completed, the upper die driver 14 also rises and comes out between the lower die driver 7 and the worker 8, so that the moving die 3 is retracted by the spring 4 and the worker 8 is also springed.
Retreat by 13. Therefore, the male molding portion 6 and the female molding portion 10 are separated from each other, and the molded product can be removed.

[Problems to be Solved by the Invention] In the conventional flange forming apparatus described above, the worker 8
The escape portion 8b needs to be provided in order to avoid interference with the peripheral edge extension portion 18a. Therefore, there is a drawback that the worker 8 is cantilevered, the overhang l is large, and the strength is weak. In addition, since the worker 8 is movably mounted on the moving die 3, the overhang l is further increased in the object to be molded 18 having the longer peripheral edge extension 18a, and it projects obliquely upward from the bottom during molding. There is a drawback that the worker 8 moves when the lifting force F is applied.

The present invention was made in view of the above circumstances, and an object of the invention is to provide a flange forming apparatus capable of improving mechanical strength and always forming in a stable state. It is in.

[Means and Actions for Solving Problems] In order to achieve the above object, the present invention comprises a lower die holder,
A movable die, which is disposed on the upper surface of the lower die holder so as to be slidable in the horizontal direction and has first and second columnar portions extending upward from both ends in the sliding direction, and the above-mentioned movable die. An opening formed between both columnar parts, a lower die driver standing on the lower die holder and penetrating the opening,
A lower die contact surface formed on the tip of the lower die driver, and a first die formed on the lower die driver side of the tip of the first columnar portion.
Forming part, an inclined surface formed on the lower die driver side at the tip of the second columnar portion, and a biasing force for biasing the moving die in a direction in which the first columnar portion moves away from the lower die driver. Means, an upper die holder disposed above the moving die and the lower die driver and movable in the vertical direction, an upper die extending downward from the upper die holder and facing the second columnar portion. The driver and the upper die driver are formed at the extended end of the upper die driver, and when the upper die holder moves downward, they come into contact with the inclined surface and then slide to move the moving die against the urging force of the urging means. Then, a space is provided between the sliding surface for moving the first columnar portion in the direction approaching the lower mold driver and the lower surface of the upper mold holder via an elastic member and the same upper mold holder. Provided on the pad and the lower surface of the pad An upper die worker, which both face the lower die driver and the first forming portion, and a second forming portion, which is formed on the first columnar portion side of the upper die worker and faces the first forming portion. An upper die contact surface that is formed on the lower die driver side of the upper die worker and comes into contact with the lower die abutment surface when the upper die holder moves downward, and the upper die holder faces downward. It is provided with a space surrounded by the above moving die, the lower driver and the upper worker when moved.

When the upper die holder moves downward, the upper die contact surface and the lower die abutment surface contact each other to position the upper die worker, and the upper die holder moves further downward. As a result, the elastic member is deformed, the upper die holder and the pad are brought close to each other, and the sliding surface and the inclined surface slide, so that the moving die causes the first molding portion to move to the second molding portion. The first and second molding portions are abutted against each other by being moved in the direction of approaching the molding portion, and a flange is molded on the molding object interposed therebetween.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

Fig. 1 shows the left half of the flange forming machine.
Is a lower die holder, and 22 is an upper die holder. A movable die 23 is placed on the upper surface of the lower die holder 21 so as to be horizontally movable,
It is biased in the backward direction (arrow a) by a spring 24 as a biasing means. The moving die 23 is provided with a concave portion 25 having an upper opening, and a male side molding portion 26 as a first molding portion is formed at a tip of a first columnar portion 51 extending upward from one end thereof.
However, the inclined surface 27 is provided at the tip of the second columnar portion 52 extending upward from the other end. Further, an opening 28 is provided at the bottom of the recess 25, and a lower die driver 29 protruding from the lower die holder 21 penetrates through the opening 28.
The moving die is attached to the upper end of the lower driver 29.
A lower die contact surface 30 that is inclined in the same direction as the inclined surface 27 provided on the 23 is provided.

On the other hand, the upper die holder 22 is vertically movable, and an upper die driver 31 is provided on the lower surface of the upper die holder 21 so as to project downward. The upper die driver 31 is provided on one side with a support surface 32 that is joined to the back surface of the lower die driver 29, and on the other side is the moving die.
A sliding surface 33 that slides on the inclined surface 27 of 23 is provided so as to be inclined. Further, a pad 35 is provided on the lower surface of the upper die holder 22 via a spring 34 as an elastic member.
The upper die worker 36 is provided at 35 so as to be movable in the same direction as the movable die 23. The upper mold worker 36 is urged in the backward direction (arrow b) by a spring 37, and the second lower part of the lower molder 36 faces the male molding part 26 on one side of the lower part.
Is provided with a female-side molding portion 38 as a molding portion. Further, on the other side of the upper mold worker 36, an upper mold contact surface 39 that contacts the lower mold contact surface 30 of the lower mold driver 29 is provided so as to be inclined.

Next, the operation of the flange forming apparatus configured as described above will be described. When the upper die holder 22 is lowered with the molding target 40 set on the moving die 23, the upper die driver
The 31 and the upper worker 36 move down together. Therefore, first, when the upper mold contact surface 39 of the upper mold worker 36 contacts the lower mold contact surface 30 of the lower mold driver 29 and the upper mold holder 22 descends, the upper mold worker 36 causes the upper mold worker 36 to urge the spring 37. After being slightly moved in the forward direction (arrow c) against the above, it is fixedly held by the pad 35 and the lower die driver 29. Next, the supporting surface 32 of the upper die driver 31 is joined to and supported by the back surface of the lower die driver 29, and the sliding surface 33 of the upper die driver 31 is joined to the inclined surface 27 of the moving die 23. When the upper driver 31 further descends from this state, the sliding die 33 moves the moving die
23 is the forward direction (arrow d) against the urging force of the spring 24
Move to. Therefore, the male side molding portion 26 of the moving die 23 and the female side molding portion 38 of the upper die worker 36 come close to each other to form the flange 41 on a part of the molding target 40. At this time, the male side molding portion 26 of the moving die 23 is pushed up obliquely upward from the bottom, but the upper die worker 36 is fixed by the lower die driver 29 and the pad 35 earlier than the plunging of the moving die 23. Therefore, the upper die work 36 does not move due to the molding pressure, and the mechanical strength can be improved.

[Effects of the Invention] As described above, according to the present invention, the upper die holder is provided with the upper die worker, and the movable die is moved to perform molding while the upper die worker is fixed. The present invention has an effect that it has sufficient mechanical strength against the pressure at the time of molding, stable molding can be performed, and the problem of worker overhang can be solved even in a molded object having a long peripheral extension.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view after molding showing an embodiment of the flange molding apparatus of the present invention, FIG. 2 is a vertical sectional side view after molding showing a conventional flange molding apparatus, and FIG. It is a figure. 21 …… Lower die holder, 22 …… Upper die holder, 23 …… Movement die, 26 …… Male side molding part, 29 …… Lower die driver, 31 …… Upper die driver, 33 …… Sliding surface, 35 ...... Pad, 36 …… Upper mold worker, 38 …… Female side molding part, 39 …… Upper mold contact surface, 40 ……
Molded object.

Claims (1)

[Scope of utility model registration request] 1. A lower die holder and first and second columnar portions which are slidably arranged in the horizontal direction on the upper surface of the lower die holder and which extend upward from both ends in the sliding direction. A moving die having the same, an opening formed between the columnar portions of the moving die, a lower die driver standing on the lower die holder and penetrating the opening, and formed at the tip of the lower die driver. The lower die contact surface, the first molding portion formed on the lower die driver side at the tip of the first columnar portion, and the lower die driver side formed on the lower die driver side at the tip of the second columnar portion. An inclined surface,
An urging means for urging the moving die in a direction in which the first columnar portion moves away from the lower die driver, and an upper die which is arranged above the moving die and the lower die driver and is vertically movable. A holder, an upper die driver extending downward from the upper die holder and facing the second columnar portion, and an upper end of the upper die driver formed at an extending end of the upper die driver, and when the upper die holder moves downward. A sliding surface that slides after coming into contact with the inclined surface to move the movable die against the biasing force of the biasing means in the direction in which the first columnar portion approaches the lower die driver; A pad disposed on the lower surface of the die holder via an elastic member and having a space between the pad and the upper die holder, and an upper die provided on the lower surface of the pad and facing the lower die driver and the first molding portion. A worker and the upper die A second molding portion that is formed on the first columnar portion side of the mold and faces the first molding portion, and the upper mold holder that is formed on the lower mold driver side of the upper mold worker An upper die contact surface that comes into contact with the lower die contact surface when the upper die holder moves, and a space surrounded by the moving die, the lower die driver, and the upper die worker when the upper die holder moves downward. When the upper die holder moves downward, the upper die contact surface and the lower die abutment surface contact each other to position the upper die worker, and the upper die holder moves further downward. By doing so, the elastic member is deformed so that the upper die holder and the pad come close to each other and the sliding surface and the inclined surface slide, so that the moving die causes the first molding portion to move to the first molding portion. The first and second parts are moved in a direction approaching the second molding part. Molding portion abuts, flanging device flange to the molded product interposed therebetween, characterized in that it is configured to be molded.