JPH0512044B2 - - Google Patents

Description

[Detailed Description of the Invention] A. Purpose of the Invention (1) Industrial Application Field The present invention provides a method for positioning and mounting a workpiece having an upper plate portion and a side plate portion bent downward from the edge of the upper plate portion. A die consisting of a plurality of die parts that are capable of approaching and moving away from each other;
The present invention relates to a bending die device including: a bend punch for forming an inwardly bent bent portion at the lower end of the side plate of the workpiece.

(2) Conventional technology Conventionally, in such a bending mold device, the die parts are brought close to each other after the bending process is completed in order to prevent the bent part from getting caught on the die part and becoming impossible to remove after the bending process. The bent part is made to come off the die part.

(3) Problems to be solved by the invention However, with the above-mentioned conventional technology, it is difficult to reliably remove the bent part from the die part, and the worker has to remove it manually, or the workpiece has to be removed. There were problems such as the unloading position being unstable, which hindered automatic unloading.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a bending die device with a simple structure that solves the above problems by ensuring that the workpiece is removed from the die after the bending process is completed. .

B. Structure of the Invention (1) Means for Solving the Problems In order to achieve the above object, the present invention provides an upper plate portion, and an upper plate portion that is bent downward from one end edge and the other end edge in a predetermined direction. a die consisting of a pair of die parts capable of positioning and mounting a work having a side plate part and relatively movable in the predetermined direction; and a first relative die in which the first and second die parts are separated from each other. a bend punch that moves toward the die part when the die part is in the position and forms an inward bent part at the lower end of the side plate of the workpiece, and a second relative position in which both the die parts are close to each other; In the bending die device, a machined workpiece is taken out from the die portion when the die portion is in the bending die portion, and each die portion is provided with a pin mechanism corresponding to the bending punch, which extends through the die portion in the predetermined direction. A knockout pin, which is biased by a spring toward the other die part, is slidably inserted into the pin hole of each die part,
In the process of the two die parts approaching each other and reaching the second relative position, each knockout pin is slid outward with respect to the die part, and the outer end of the pin is brought into contact with the corresponding bent part of the workpiece. Each die part is characterized in that it has a pin pressing part that pushes the inner end of the knockout pin of the other die part in the above process.

(2) Function When both die parts are in the first relative position where they are separated from each other, they can cooperate with the bend punch to form an inward bent part on the workpiece side plate part.

After forming, each knockout pin is slid outward relative to the die portion and the outer end of the pin is attached to the corresponding workpiece while the two die portions approach each other and reach the second relative position. Since the bent portion can be brought into contact with the bent portion, the bent portion can be automatically removed from the die portion by contact with the knockout pin.

In particular, in the above process, when each knockout pin is slid outward as the two die parts approach each other, the inner end of the knockout pin is directly pushed by the other die part. The knockout pin can be slid outward gradually and strongly in accordance with the approach speed and distance between both die parts, and the workpiece bending part can always be reliably separated from the die part in a timely manner. can.

(3) Embodiment Hereinafter, an embodiment of the present invention will be explained with reference to the drawings.First, in FIG. part 1, a side plate part 2 bent downward from one end edge of the upper plate part 1 in a predetermined direction (horizontal direction in FIG. 1), and a side plate part 3 bent downward from the other end edge of the upper plate part 1. has. Both side plate portions 2 and 3 of this workpiece W are subjected to bending by the mold apparatus of the present invention. That is, bent portions 4 and 5 bent inward are formed at the lower ends of both side plate portions 2 and 3.

This mold device includes a die 7 provided on a fixed base 6, bend punches 8 and 9 for performing bending in cooperation with the die 7, and an upper part of a workpiece W placed on the die 7. an elevating body 10 that is driven up and down by a drive means (not shown); a pressing pad 11 that is supported by the elevating body 10 and capable of relative vertical movement;
Die drive mechanism 12 for driving a part of die 7
and punch drive mechanisms 13 and 14 for driving the bend punches 8 and 9.

The die 7 includes a fixed die portion 15 provided integrally with the base 6, and a fixed die portion 15 adjacent to the fixed die portion 15.
The fixed die section 15 and the movable die section 16 constitute a pair of die sections of the present invention. Those die parts 15,1
The upper surface of the die portion 6 is curved to correspond to the upper plate portion 1 of the workpiece W, and the mutually opposite side surfaces of both die portions 15 and 16 are vertically curved corresponding to the side plate portions 2 and 3 of the workpiece W. Horizontal pin holes 17 and 18 are formed in a plane and are formed in the lower portions of the side surfaces of the die portions 15 and 16 to correspond to the bend punches 8 and 9 and are formed to penetrate through the die portions 15 and 16 in the predetermined direction. The outer end of is open. Each of the pin holes 17, 18 is constituted by a stepped hole consisting of an outer small diameter hole 17a, 18a and an inner large diameter hole 17b, 18b. , so that bend punches 8 and 9 can be received when bending the workpiece bending parts 4 and 5.

A movable plate 19 is slidably disposed on the base 6 so as to be able to approach and move away from the fixed die part 15, and the movable die part 16 is integrated with the end of the movable plate 19 on the fixed die part 15 side. established in Moreover, the movement of the movable plate 19 toward the fixed die portion 15 is regulated by a stopper 20 fixed to the base 6, and the movement of the movable plate 19 to the side of the fixed die portion 15 is regulated by a stopper 20 fixed to the base 6. A spring 22 is interposed between the movable plate 19, that is, the movable die portion 16, and biases the movable die portion 16 toward the fixed die portion 15.

One bend punch 8 is fixed to a cam follower 23 corresponding to the pin hole 17, and the cam follower 23 is slidably disposed on the base 6 so as to be able to approach and move away from the fixed die portion 15. be done. Moreover, a stopper 24 is fixedly installed at the end of the base 6 to restrict the movement of the cam follower 23 away from the fixed die part 15, and between the fixed die part 15 and the cam follower 23, the cam follower 23, that is, the bend punch 8 is fixedly provided. A spring 25 is interposed to bias the die part 15 away from the fixed die part 15.

The other bend punch 9 is fixed to the cam follower 26 in correspondence with the pin hole 18 . This cam follower 26 has a relative proximity to the movable die portion 16;
It is slidably disposed on the movable plate 19 so that it can be moved away. Moreover, a stopper 27 is provided at the end of the movable plate 19 opposite to the movable die portion 16 to restrict the movement of the cam follower 26 away from the movable die portion 16.
A spring 28 is interposed between the cam follower 26 and the movable die portion 16 to bias the cam follower 26 , that is, the bend punch 9 in a direction away from the movable die portion 16 .

The inner end opening of the large diameter hole 17b of the pin hole 17 in the fixed die portion 15 is closed with a cover 30, and a knockout pin 31 passing through the cover 30 is slidably fitted into the pin hole 17. It is inserted. The outer end of the knockout pin 31 extends into the small diameter hole 17a and can come into contact with the tip of the workpiece bending part 4.
1 is a spring 32 interposed between the fixed die portion 15
The inner end of the knockout pin 31 is biased inwardly (leftward in FIG. 1) by the movable die portion 16 when the movable die portion 16 approaches the fixed die portion 15. The inner end wall 16a comes into contact with the inner end wall 16a.

On the other hand, the pin hole 1 in the movable die portion 16
The inner end opening of the large diameter hole 18b of No. 8 is closed with a cover 34, and a knockout pin 35 passing through the cover 34 is slidably inserted into the pin hole 18. The outer end of this knock-out pin 35 extends into the small diameter hole 18a and the workpiece bending portion 5
The knockout pin 35 is urged inward (to the right in FIG. 1) by a spring 36 interposed between the knockout pin 35 and the movable die portion 16. The inner end of the out pin 35 is pressed against the inner end wall 15 as a pin pressing portion of the fixed die portion 15 when the movable die portion 16 approaches the fixed die portion 15.
a.

The pressing pad 11 is supported by the elevating body 10 so as to be able to move vertically relative to it within a limited range so as to come into contact with the upper surface of the workpiece W placed on the die 7 .
Moreover, a spring 37 is interposed between the elevating body 10 and the pressing pad 11 to bias the pressing pad 11 downward.

A cam block 38 is fixed to the elevating body 10 in correspondence with the cam follower 26 and the stopper 27, and a cam block 39 is fixed in correspondence with the cam follower 23.

The die drive mechanism 12 includes a pressing member 40 fixed to the cam block 38 and a pressure receiving member 41 fixed to the stopper 27. A pressing surface 42 inclined in a direction away from the portion 16 is provided, and the pressure receiving member 41 is provided with a pressure receiving surface 43 inclined corresponding to the pressing surface 42. According to this configuration, when the cam block 38 descends and the pressing surface 42 comes into contact with the pressure receiving surface 43, the movable plate 19
moves in a direction away from the fixed die portion 15 against the spring force of the spring 22.

The punch drive mechanism 13 includes a cam block 39,
The cam block 39 is provided with a pressing surface 45 that slopes upward toward the fixed die portion 15, and the pressure receiving member 44 has a pressing surface 45 that is inclined upward toward the fixed die portion 15. An inclined pressure receiving surface 46 is formed corresponding to the surface 45. According to this configuration, the cam block 39
is lowered and the pressing surface 45 comes into contact with the pressure receiving surface 46, so that the cam follower 23, that is, the bend punch 8 resists the spring force of the spring 25 and moves the fixed die portion 15.
Driven by pressure to the side.

The punch drive mechanism 14 includes a cam block 38,
The cam block 39 is provided with a pressing surface 48 that slopes upward toward the movable die portion 16, and the pressure receiving member 47 has a A pressure receiving surface 49 is formed which is inclined corresponding to the pressure receiving surface 48 . According to this configuration, the cam block 38
When the pressing surface 48 comes into contact with the pressure receiving surface 49, the cam follower 26, that is, the bend punch 9 is pressed and driven toward the movable die portion 16 against the spring force of the spring 28.

Moreover, each of the drive mechanisms 12, 13, and 14 is set so that, as the elevating body 10 descends, the die drive mechanism 12 operates first, and then the punch drive mechanisms 13, 14 operate.

Next, the operation of this embodiment will be explained. When the elevating body 10 is raised, the movable plate 19 moves toward the fixed die part 15 by the spring force of the spring 22, and the movable die part 16 has no fixed die. part 1
It is close to 5. Further, the bend punches 8 and 9 are also separated from both die portions 15 and 16. In this state, both die parts 15 and 16 are in the second relative position of the present invention in close proximity to each other, and a workpiece W to be processed is placed on these die parts 15 and 16 as shown in FIG. Ru.

When the elevating body 10 is lowered in such a state, the movable plate 19, that is, the movable die portion 16 is moved in a direction away from the fixed die portion 15 by the action of the die drive mechanism 12, as shown in FIG. As a result, both side plate portions 2 and 3 of the work W come into contact with the outer surfaces of the fixed die portion 15 and the movable die portion 16, respectively. Thereafter, the pressing pad 11 comes into contact with the upper surface of the workpiece W, and the workpiece W is clamped and fixed between the die 7 and the pressing pad 11. At this time, both die portions 15 and 16 are in the first relative position of the present invention where they are separated from each other, and are in a state where bending can be performed in cooperation with bend punches 8 and 9.

When the elevating body 10 further descends, the punch drive mechanisms 13 and 14 operate, as shown in FIG.
7a and the bend punch 8, one bent part 4 is bent and formed, and the other bent part 5 is bent and formed by the pin hole 18a in the movable die part 16 and the bend punch 9.

After the bent portions 4 and 5 are formed in this manner, the elevating body 10 is raised as shown in FIG.
This allows the bend punches 8 and 9 to
5 and 16, the movable plate 19, that is, the movable die portion 16 approaches the movable die portion 15. As a result, the inner end of the knockout pin 31 is pressed against the inner end wall 1 as a pin pressing portion of the movable die portion 16.
6a and is pressed outward, and the inner end of the knockout pin 35 also comes into contact with the inner end wall 15a of the fixed die portion 15, which serves as a pin pressing portion, and is pressed outward. The pins 31 and 35 slide outwardly within the corresponding pin holes 17 and 18, respectively. As a result, knockout pin 31,
The outer ends of the parts 35 abut the tips of the corresponding bending parts 4 and 5 of the workpiece, and the bending parts 4 and 5 are connected to the die part 1.
Small diameter hole portions 17a of pin holes 17, 18 of 5, 16,
18a to separate it from the bent portion 4,
5 are removed from the small-diameter holes 17a, 18a, thus making it extremely easy to take out the work W after the bending process from the die 7.

In particular, in the above process, when the knockout pins 31 and 35 are slid outward as the die portions 15 and 16 approach each other, the knockout pins 3
Since the inner ends of the two die parts 16, 15 are directly pushed by the other die parts 16, 15, each knockout pin 31, 35 is adjusted to match the approaching speed and distance between the two die parts 15, 16. The work pieces can be slid outward gradually and strongly, and the workpiece bending parts 4 and 5 can always be reliably separated from the die parts 15 and 16 in a timely manner.

In the above embodiment, the die is split into two parts, but the present invention can also be applied to a four-part die which bends the entire circumference of the workpiece.
Further, although one of the die parts constituting the die is fixed, both die parts may be movable. Further, although the above embodiment shows an example of a trimming bend, it is also possible to apply the present invention to a simple hemming bend mold device.

C. Effects of the Invention As described above, according to the present invention, the bend punch cooperates with the two die parts located at the first relative positions separated from each other to bend and form the inward bent part on the workpiece side plate part. After that, both die parts approach each other and the second die part approaches each other.
In the process of reaching the relative position, each knockout pin can be slid outward with respect to the die part and the outer end of the pin can be brought into contact with the above-mentioned bent part of the corresponding workpiece. The bending part can be automatically separated from the die part by contact with the bending part, and therefore, the workpiece can be removed extremely easily and quickly after the bending process has been completed, contributing to improved work efficiency. obtain.

In particular, a pin hole is formed in each die portion and passes through the die portion in the direction of relative movement of both die portions, and the knockout pin, which is spring-biased toward the other die portion, is slid into each pin hole. Since each die part is integrally provided with a pin pressing part that presses the inner end of the knockout pin of the other die part in the above process, it responds to the mutual approach of both die parts in the above process. In order to slide each knockout pin outward, there is no need to provide a relatively complicated interlocking mechanism such as a cam mechanism, and the inner end of the knockout pin is simply pushed against the other die part. Since only one knockout pin is required, the structure of the device can be simplified, which contributes to cost reduction and improved maintenance workability.
Since both die parts can be slid outward gradually and strongly in accordance with the approaching speed and distance of each other, the bent part of the workpiece can always be reliably separated from the die part in a timely manner, thus improving the processing speed. The position of the finished workpiece is stabilized, and automatic unloading of the workpiece is facilitated.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a vertical cross-sectional side view of the mold device before work starts,
3, and 4 are longitudinal sectional side views sequentially showing states after the start of operation. 1... Upper plate part, 2, 3... Side plate part, 4, 5...
Bend part, 7... die, 8, 9... bend punch,
15...Fixed die part as die part, 16...
...Movable die parts as die parts, 15a, 16
...Inner end wall as pin pressing part, 17, 18...
Pin hole, 31, 35... Knockout pin, 3
2,36...Spring, W...Work.

Claims (1)

[Claims] 1. A workpiece W having an upper plate part 1 and side plate parts 2 and 3 bent downward from one end edge and the other end edge of the upper plate part 1 in a predetermined direction, respectively, can be positioned and placed, and A die 7 consisting of a pair of relatively movable die parts 15 and 16, and when both die parts 15 and 16 are in a first relative position separated from each other, move toward the die parts 15 and 16,
Connect the inward bent parts 4 and 5 to the side plate parts 2 and 3 of the workpiece W.
Bend punch 8 for forming each at the lower end,
9, when both die portions 15, 16 are in a second relative position adjacent to each other, the die portions 15, 16
In the bending die device in which the processed work W is taken out from the die portions 15 and 16,
has a pin hole 1 passing through it in the predetermined direction.
7 and 18 are bored corresponding to the bend punches 8 and 9, and a spring 3 is provided in the pin holes 17 and 18 of each die part 15 and 16 on the side of the other die part 16 and 15.
2, 36 energized knockout pins 31, 35
are slidably inserted into the die portions 15 and 16, and in the process of the two die portions 15 and 16 approaching each other and reaching the second relative position, the knockout pins 31 and 35 are inserted into the die portions 15 and 16.
In the process, each die section 15, 16 is connected to the other die section 16 in such a way that it can be slid outwardly relative to the other die section 16 to bring its outer end into contact with the bend 4, 5 of the corresponding workpiece W. ,15 knockout pin 35,3
1. A bending mold device characterized by integrally having pin pressing parts 15a and 16a for pushing an inner end.