JP4446627B2 - Punching device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a punching device, and more particularly, to a die structure for simultaneously processing upper and lower punching portions with a single punch body.
[0002]
[Prior art]
Conventionally, a vehicle frame was formed by pressing or welding a steel plate into a rod shape with a rectangular closed cross-sectional shape. However, due to the demand for weight reduction, an extruded product of aluminum alloy (also simply called aluminum) is used. Is being considered and is also starting to be used. And mainly for manufacturing reasons, the frame of the vehicle is divided into a plurality of frame members and extruded, and the ends of the obtained frame members are joined together to assemble a side frame, for example (special (See Kaihei 5-58338).
[0003]
9 to 11 are perspective views showing an example of the frame member. The material 1 shown in FIG. 9 has a rectangular closed cross-sectional shape and is formed in a long shape by extrusion molding of aluminum, and has a shape in which small closed cross-sections are stacked in two steps.
In this material 1, the longitudinal wall portions 2 and 3 on one end side are notched to form an intermediate body 1A having the shape shown in FIG. 10, and the horizontal wall portion 5 and the intermediate wall portion 6 remaining in the intermediate body 1A are further cut. At the same time, the joining piece 4a is formed on the lateral wall portion 4, whereby the product 1B shown in FIG. 11 is obtained. For example, when assembled as a side frame, the exposed joining piece 4a is used to join the mating member.
[0004]
[Problems to be solved by the invention]
The above-described processing of the material to be processed (hereinafter simply referred to as “material”) takes a lot of man-hours because it is exclusively performed by machining when the shape of the end is complicated. Therefore, there is a demand for productivity improvement measures such as using a cutting press.
When the material length is relatively short, a core member for maintaining a closed cross-sectional shape can be inserted from the end opposite to the cutting side, and can be cut with a cutting press. .
However, such a method is not suitable for mass production because it becomes difficult to ensure accuracy when the length of the material is long, and it takes time for setup.
[0005]
The present invention has been made in view of the above problems, and its purpose is to easily and accurately place the upper and lower punching portions of a material when processing an end portion of an extruded molded product or the like having a closed cross-sectional shape. It is an object of the present invention to provide a punching device capable of simultaneous processing.
[0006]
[Means for Solving the Problems]
The above problems are solved by the punching device having the structure described in each of the above claims.
The “punching” in the present invention refers to general shearing processing including cutting, drilling, notching and the like in addition to normal punching.
Further, “inserted” is a relative representation of the positional relationship, and either the side to be inserted or the side to be inserted may be fixed.
Further, it can be said that the punching device is generally a mold set installed in a bolster of a press machine.
[0007]
The punching apparatus of the present invention is used by being set in a press machine. Then, in a state where the punch body is positioned above, the material is set so that the lower die supports the lower punching portion of the material and the core member supports the upper punching portion. Thereafter, the punch body is pressed by the operation of the press machine . As for a punch body, the 1st blade part and the 2nd blade part are connected by the connection part. Therefore, when the punch body is pressed , the upper punching site is punched out by the blade portion of the core member and the second blade portion of the punch body paired therewith, and almost simultaneously, the lower die blade portion and this The lower punching part is punched out by the first blade part of the pair of punch bodies. In this way, the upper and lower punching portions of the material can be simultaneously processed by one punch body, which can contribute to the improvement of productivity.
[0008]
In this punching device , the core member passes through a hole provided in the connecting portion of the punch body and is fixed to the support member so that the punch body can move up and down with respect to the lower die. The apparatus is made compact by engaging the punch body with the core member in a so-called floating state. The punch body is arranged on the side where the core member is inserted into the material. Therefore, taking as an example the case of processing the end of a long closed cross-section member as a material, the core member is inserted from the processing end side with respect to that material, compared to inserting from the opposite side. As a result, the length of the core member can be shortened, so that the support rigidity is ensured and the setting accuracy of the material is easily maintained. In addition, the machining cycle is shortened because it can be set simply by inserting the material between the lower die that is actually divided into the top and bottom and the blade portion of the punch body.
In addition, this punching apparatus can be suitably used for press punching an end portion of a closed cross-section member formed by extrusion molding.
[0009]
The punch body of this punching device is preferably configured to be biased in a direction away from the lower mold by a biasing means such as a spring.
[0010]
In punching device of the present invention preferably is column set in a state where a gap in which a plurality of core members corresponds to the wall portion of the material. In this case, it is possible to deal with a material having a shape in which the punching portions are provided over a plurality of steps separated from each other, and the plurality of punching portions can be simultaneously processed with one punch body.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 4 are diagrams illustrating the first punching device, FIGS. 5 to 8 are diagrams illustrating the second punching device, and FIGS. 9 to 11 illustrate the material to be processed. It is a figure to do. In the present embodiment, the material is sequentially processed in a first step using the first punching device and a second step using the second punching device. First, the material will be described.
[0012]
The material 1 shown in FIG. 9 has a rectangular closed cross-sectional shape and is formed in an elongated shape by extrusion molding of aluminum, and includes vertical wall portions 2 and 3, horizontal wall portions 4 and 5, and an internal space. It is made into the shape where the smaller closed cross section was piled up on two steps on the middle wall part 6 which partitions off. In addition, one edge part of the vertical wall part 2 protrudes as the hook-shaped part 7 over the whole length.
One end of the material 1 is processed by a first punching device described below to obtain an intermediate 1A shown in FIG. The vertical wall portion 2 is formed with notches 2a and 2b, and the vertical wall portion 3 is formed with notches 3a and 3b.
Said intermediate body 1A is processed with the 2nd punching apparatus mentioned below, and it is set as the product 1B shown in FIG. 4a in the figure is a joining piece formed on the lateral wall 4.
Then, when the product 1B is assembled as, for example, a side frame, the product 1B is joined to the mating member using the exposed joining piece 4a.
[0013]
Next, the first punching device will be described. As shown in FIGS. 1, 2, and 3, a lower mold 22, a support member 23, and a support base 33 are fixed to a lower mold holder 21 installed in a bolster B of a press machine. The lower mold 22 is formed with a blade portion 22a (see FIG. 4) corresponding to the lower punching portion of the material 1 (see the cutout portions 2a and 2b in FIG. 10). The support member 23 has an upstanding support wall 23a, and the support wall 23a is provided with a mounting portion in which a mounting hole 23b having a circular cross-sectional shape and a mounting hole 23c having a rectangular cross-sectional shape are formed on the same axis. One end of a core member 24 to be described below is fixed thereto.
[0014]
The core member 24 is inserted into the material 1, in other words, the insertion portion that supports the upper punching site of the material 1 or the vicinity thereof in a state where the end of the material 1 is externally fitted to the core member 24. 24a and a prismatic mounting arm 24b extending from the insertion portion 24a, and the insertion portion 24a has a blade portion having a shape corresponding to the upper punching portion of the material 1 (see the cutout portions 3a and 3b in FIG. 10). 24c is formed.
The mounting arm 24b passes through a long hole-shaped guide portion 25a which is long in the vertical direction of the punch body 25 to be described below, and the distal end portion is fitted into the mounting hole 23c. The mounting arm 24b is attached to the screw hole 24d of the mounting arm 24b. The three core members 24 are fixed at predetermined positions by screwing the mounting bolts 23d inserted into the holes 23b. In this case, the three core members 24 are arranged in a state where they are aligned in a horizontal row with a gap corresponding to the horizontal wall portion 5 and the middle wall portion 6 of the material 1.
[0015]
As described above, the punch body 25 is supported in a vertically movable state by the vertically long guide portion 25a engaging the mounting arm 24b. In this case, the inner surface of the guide portion 25a and the side surface of the mounting arm 24b are formed to be slidable, and the side portion of the punch body 25 is formed to be slidable with respect to the insertion portion 24a and the support wall 23a. The position of the punch body 25 is regulated as necessary. Further, the punch body 25 is formed with a blade portion 25 b that makes a pair with the blade portion 22 a of the lower mold 22 and a blade portion 25 c that makes a pair with the blade portion 24 c of the core member 24. The punch body 25 is fixed to the punch holder 26 via a fixture such as a bolt (not shown).
A bolt body 27 b that supports the return spring 27 a and regulates the upper limit position of the punch body 25 through the punch holder 26 is inserted into the hole 26 a of the punch holder 26.
[0016]
An upper member 29 that is guided by a guide post 28 installed on the lower mold holder 21 and that can be moved up and down is disposed above the lower mold holder 21. The upper member 29 is configured such that a pressing pressure is applied from a slide body (not shown) of the press machine main body, and a plate 29a fixed to the upper member 29 abuts on the upper surface of the punch holder 26 and pushes it down. It has become.
A pressing member 31 is attached to the upper member 29 via a suspension bolt 30 so as to be movable up and down. Reference numeral 32 in the drawing denotes a spring for pressing the material 1 by urging the pressing member 31 downward.
FIG. 4 shows a state where the punch body 25 is lowered. In the figure, S is a punched scrap.
[0017]
Next, the second punching device will be described.
As shown in FIGS. 5, 6, and 7, a lower mold 42, a support member 43, and a support base 53 are fixed to a lower mold holder 41 installed on a bolster B of a press machine. The lower die 42 is formed with a blade portion 42a having a shape corresponding to the lower punching portion of the intermediate body 1A. An attachment portion including an attachment hole 43b and an attachment hole 43c is formed in the support wall 43a of the support member 43, and one end portion of the core member 44 described below is fixed thereto.
Compared with the first punching device, the second punching device differs in the portion related to the blade shape based on the difference in the punching shape, but basically both devices have substantially the same configuration. In the second punching device, the upper surfaces of the lower die 42 and the support base 53 are inclined with respect to the upper surface of the lower die holder 41, and a predetermined notch shape is obtained by setting the material 1 in an inclined state. It is supposed to be.
[0018]
The core member 44 (44A and 44B) includes an insertion portion 44a that supports the upper punching portion of the intermediate body 1A or the vicinity thereof, and a mounting arm 44b that extends from the insertion portion 44a. A blade portion 44c or 44d having a shape corresponding to the upper punching portion of the intermediate body 1A is formed.
[0019]
The two core members 44A and 44B are fixed at predetermined positions by the mounting bolts 43d. In this case, the two core members 44A and 44B are lined up and down in a state in which a gap into which the intermediate wall portion 6 of the intermediate body 1A can be inserted is provided.
[0020]
The punch body 45 is supported in a vertically movable state by a guide portion 45a that is long in the vertical direction engaging the mounting arm 44b. The punch body 45 includes a blade portion 45b paired with the blade portion 42a of the lower die 42, a blade portion 45c paired with the blade portion 44c of the lower core member 44A, and an upper core member 44B. A blade portion 45d that is paired with the blade portion 44d is formed. The punch body 45 is fixed to the punch holder 46 via an attachment such as a bolt (not shown).
The hole 46 a of the punch holder 46 is inserted with a bolt body 47 b that supports the return spring 47 a and regulates the upper limit position of the punch body 45 through the punch holder 46.
[0021]
In the upper position of the lower mold holder 41, an upper member 49 that is guided by a guide post 48 installed on the lower mold holder 41 so as to be movable up and down is disposed. The upper member 49 is configured such that a pressing pressure is applied from a slide body (not shown) of the press machine main body, and a plate 49a fixed to the upper member 49 abuts on the upper surface of the punch holder 46 and pushes it down. It is like that.
A pressing member 51 is attached to the upper member 49 via a suspension bolt 50 so as to be movable up and down. Reference numeral 52 in the figure denotes a spring for pressing down the pressing member 51 to press the intermediate body 1A.
A state where the punch body 45 is lowered is shown in FIG. S in the figure is a punched scrap.
[0022]
Now, an operation process using the first punching device and the second punching device will be described.
[First step]
In the first step, an intermediate body 1A in which notches 2a, 2b, 3a, and 3b are formed on two opposing surfaces, that is, the vertical wall portions 2 and 3, by subjecting the end portion in the longitudinal direction of the material 1 to press working. To get.
In the first punching device, when the slide body of the press machine body is in the upper position, the punch body 25 is lifted to the upper position together with the punch holder 26 by the action of the return spring 27a, and the upper member 29 is moved upward. Therefore, the holding member 31 is also lifted to the upper position by the suspension bolt 30.
[0023]
At this timing, the material 1 is put in a posture (see FIG. 3) with the vertical wall portion 2 facing down. At that time, the end portion of the material 1 has the vertical wall portion 2 inserted into the gap between the upper surface of the lower mold 22 and the lower surface of the core member 24, and the horizontal wall portion 5 in the gap between the adjacent core members 24. And the middle wall 6 are inserted. The support base 33 supports a position slightly away from the end of the material.
In the first punching device, the punch body 25 is arranged on the side where the core member 24 is inserted into the material 1, and the setting of the material 1 is easy and the accuracy is easily maintained, so that the machining cycle can be shortened. it can.
[0024]
When the press machine is operated in this state, the upper member 29 is lowered due to the slide body of the press machine body descending, the pressing member 31 comes into contact with the vertical wall part 3, and the vertical wall part 3 is pressed by the action of the spring 32. It is done.
On the other hand, the press pressure is transmitted to the punch holder 26 through the plate 29a, and the punch holder 26 and the punch body 25 are lowered against the urging force of the spring 27a.
Then, as shown in FIG. 4, the upper punching site is punched out by the blade portion 24c of the core member 24 and the blade portion 25c of the punch body 25, and at the same time, the blade portion 22a of the lower mold 22 and the punch body 25 The lower punching site is punched by the blade portion 25b.
In this way, the upper and lower punching parts of the material 1 can be simultaneously processed with one stroke of the press.
Thereafter, the intermediate member 1A is taken out at the timing when the upper member 29 is lifted by the movement of the slide body of the press machine body, and the subsequent material 1 is set.
[0025]
[Second step]
In the second step, the end of the intermediate body 1A is pressed from an angle different from that of the first step, and the remaining unnecessary portions, that is, the lateral wall portion 5 and the inner wall portion 6 are punched and removed, and the lateral wall A product piece 1B is obtained by forming a joining piece 4a having a predetermined shape in the portion 4.
The intermediate 1A obtained after the processing in the first step is transferred to the second step by a conveying means such as a robot, and is put into the second punching device in a posture rotated 90 ° (see FIG. 7).
[0026]
In the second punching device, two core members 44A and 44B are arranged vertically so as to correspond to the shape of the intermediate body 1A. Basically, the same effect as the first punching device is obtained. Can play.
In the second punching device, when the slide body of the press machine body is lowered, the upper punching is performed by the blade portion 44d of the core member 44B and the blade portion 45d of the punch body 45 as shown in FIG. The part is punched, and at the same time, the upper punching part below it is punched by the blade part 44c and the blade part 45c. The part is punched out.
In this way, it is possible to simultaneously process the three punched sites of the upper, middle, and lower stages of the intermediate 1A with one stroke of the press.
Thereafter, the product 1B is taken out at the timing when the upper member 49 is raised following the movement of the slide body of the press machine body, and the subsequent intermediate 1A is set.
[0027]
In the above-described embodiment, it is practical that the first punching device and the second punching device are installed in the same press machine, and automatic transfer of workpieces (materials) by transfer means such as a robot. It is preferable to configure as a press.
[0028]
【The invention's effect】
As described above, in the punching device of the present invention, since the punch body is disposed on the side where the core member is inserted into the material, the length of the core member is shortened to maintain the material setting accuracy. Since it is easy to set, the machining cycle can be shortened.
In addition, since the punch body is engaged with the core member in a vertically movable state, the apparatus becomes compact and the rigidity of the movable portion is easily secured.
Further, the plurality of core members are arranged in a row with a gap corresponding to the wall portion of the material, so that a plurality of upper punching sites and lower punching sites are arranged in one stroke of the press. Can be processed simultaneously.
[Brief description of the drawings]
FIG. 1 is a front sectional view of a first punching device according to an embodiment.
FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
FIG. 3 is an exploded perspective view for explaining a main part of the first punching device.
FIG. 4 is a cross-sectional view illustrating a punched state of the first punching device.
FIG. 5 is a front sectional view of a second punching device according to the embodiment.
6 is a cross-sectional view taken along line VI-VI in FIG.
FIG. 7 is an exploded perspective view for explaining a main part of the second punching device.
FIG. 8 is a cross-sectional view illustrating a punched state of the second punching device.
FIG. 9 is a perspective view of a material.
FIG. 10 is a perspective view of an intermediate body.
FIG. 11 is a perspective view of a product.
[Explanation of symbols]
1: Material 21: Lower die holder 22: Lower die 22a: Blade portion 23: Support member 23a: Support wall 24: Core member 24a: Insertion portion 24b: Mounting arm 24c: Blade portion 25: Punch body 25a: Guide portion 25b: Blade portion 25c: Blade portion 26: Punch holder

Claims (3)

A punching device that simultaneously punches an upper punching site and a lower punching site that are separated in the vertical direction of a workpiece material with a single punch body,
A lower mold having a blade shape corresponding to the lower punching site;
A support member fixed to the lower mold;
It is fixed to the support member , has a blade portion having a shape corresponding to the upper punching site, and supports the upper punching site or its vicinity while being inserted between the upper and lower punching sites of the workpiece. A child member;
A punch body having a first blade part paired with the lower blade part, a second blade part paired with the blade part of the core member, and a connecting part connecting the first blade part and the second blade part ; With
The core member is fixed to the support member through a hole provided in a connection portion of the punch body so that the punch body can be moved up and down with respect to the lower mold,
Punching arrangement, wherein the punch body is arranged on a side of the core member is inserted against the workpiece. The punching device according to claim 1, wherein the plurality of core members are arranged with a gap corresponding to a wall portion of the workpiece. 3. The punching device according to claim 1, wherein the punching device is a punching device for simultaneously punching an upper punching portion and a lower punching portion of an end portion of a workpiece.

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