JPH0929567A - Method and equipment for drilling drawn body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method and an equipment for drilling a drawn body capable of the drawing to a vertical wall part of the drawn body together with other forming even when a cam slider can not be arranged. SOLUTION: A drilling equipment 1 of a drawn body is a secondary working equipment to achieve the post-working to a work 2 having a drawn part, and comprises a lower frame 3 on which the work 2 is loaded, an upper frame 4 which Is lowered while the work 2 is held on the lower frame 3, and a drilling means 30 fitted to the lower frame side to receive the drawn part of the work 2, and the drilling means 30 is provided with a driving means which is independently driven on the bottom dead center of the upper frame 4, and drills a hole in a vertical wall part 2c of a drawn part 2b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for punching a draw-formed body and an apparatus for collectively performing post-processing on a work that has been drawn.

[0002]

2. Description of the Related Art A work which has been subjected to a drawing process may be further subjected to a small hole process such as a piercing process, a bend process, a trim process and a burring process of a punched portion.
Such secondary processing is performed in a separate process as a post-stage processing that is a drawing processing as a primary processing. A specific example is shown in FIG.

FIG. 6 is a cross-sectional view of a main part of a hole forming apparatus according to the prior art. This hole forming apparatus 101 is a secondary processing such as hole forming for a standing wall portion 103 of a draw forming portion of a thin plate molded body 102. Is performed by the operation of the cam slider 104, an embossing punch 105 for embossing is provided on the cam slider 104 side, and an opening is provided at the tip of the embossing punch 105. On the other hand, the piercing punch 106 is provided on the fixed side, and the piercing punch 106 is
By inserting the tip of the above into the opening of the tip of the embossing punch 105, the embossing and the piercing of the standing wall portion of the draw forming portion can be performed by a one-step sliding operation (see Japanese Utility Model Publication No. 3-62623). ). Therefore, by incorporating the cam slider 104 in a vertically movable forming frame, the vertical wall portion of the draw forming portion can be processed together with other secondary processing such as punching of the flat plate portion and burring. The secondary processing step can be simplified.

[0004]

However, depending on the shape of the work, the cam slider may not be able to be arranged depending on the shape of the work, such as when burring work or other secondary processing is required near the draw forming portion. Inevitably, the processing such as drilling for the vertical wall of the draw forming part of the thin plate molding must be done as a separate process, and the additional processing process complicates the work and avoids an increase in equipment cost and lead time. Can not.

[0005]

In order to solve the above-mentioned problems, firstly, there is provided a secondary processing method after drawing forming for a thin plate formed body having a draw forming portion, wherein the thin plate forming body is a lower frame. And a lowering step of lowering the upper frame while holding the molded body on the lower frame, and after the upper frame reaches the bottom dead center, the draw forming part of the draw forming part is provided by the perforating means provided on the lower frame side. A method for drilling a draw-formed body comprising a process of drilling a vertical wall portion.

In the method for punching a drawn product, after the upper frame reaches the bottom dead center, the vertical wall of the drawn product is punched by the punching means provided on the lower frame side.
A hole is made in the vertical wall portion of the drawing portion by one stroke operation by raising and lowering the upper frame.

Secondly, the descending step is accompanied by a burring process for interlocking with the descending operation of the upper frame for the burring of the window punching portion of the thin plate molded body.

In the above-described drawing method for punching a drawn body, since the burring process is involved in the descending step, the burring process is performed by raising and lowering the upper frame together with the drilling of the standing wall portion of the draw forming section at the bottom dead center. It is done by a stroke operation.

Thirdly, there is provided a secondary processing apparatus for performing an additional process on a thin plate molded body having a draw-molded portion, in which a lower frame on which the thin plate molded body is placed and a molded body on the lower frame are pushed down. An upper frame, a perforating means which is mounted in a lower frame which receives the draw forming part of the molded body, and which makes a hole in the standing wall part of the draw forming part, and the perforating means which is independent of the lowering operation of the upper frame. And drivable driving means.

The above-mentioned device for punching a draw-formed body is provided in a lower frame for receiving a draw-formed part of the molded body, and a bottom frame side punching means for making a hole in a standing wall portion of the draw-formed part, and this hole. Since the opening means is provided with the driving means for operating at the bottom dead center of the upper frame, after the upper frame reaches the bottom dead center, the vertical wall portion of the draw forming section is provided by the hole forming means provided on the lower frame side. Drilling is done, and by this process, the upper frame moves up and down.
The stroke operation makes a hole in the vertical wall portion of the drawing portion.

Fourthly, the lower frame is provided with a guide bush leading the cutting drill of the lower frame side drilling means, and a support means including a guide plate fixing the guide bush. And a notch for receiving the tip of the drill is formed in the pad.

On the lower frame side of the draw-forming apparatus for the draw-formed body, there is provided a drill of lower frame side hole forming means, a support means including a guide bush and a fixing guide plate, and a notch on the upper frame side. Since the pad with parts is provided, the drill positioning accuracy and hole accuracy are secured.

Fifthly, the boring device is provided with burring means for burring the peripheral edge of the window punching portion of the thin plate molded body by lowering the upper frame.

Since the above-described apparatus for punching a drawn body is provided with the burring means for lowering the upper frame, the burring processing is performed in combination with the punching for the standing wall portion of the drawn portion at the bottom dead center. This is done in one stroke by raising and lowering the frame.

[0015]

Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings should be viewed in the direction of reference numerals. 1 is a cross-sectional view of a drilling device according to the present invention, FIG. 2 is an enlarged view of a main part of FIG. 1, FIG. 3 is a perspective view showing a working mode by a lower frame side drilling means, and FIG. 4 is A of FIG. -A line sectional view, FIG. 5 is a BB line sectional view of FIG.

In FIG. 1, a punching device 1 is a forming frame device including a lower frame 3 on which a work 2 is placed, and an upper frame 4 descending toward the lower frame 3, and a drawing forming member. Various processing parts for collectively performing secondary processing such as drilling and burring are collectively provided.

The burring portion 10 has a seesaw cam 12 which receives the lowering operation of the action portion 11 which is interlocked with the upper frame 4 to change its operation, a burring punch 13 which is moved up by the seesaw cam 12, and the upper frame 4 side. It comprises a burring pad 14 for holding the work 2. The burring part 10 pushes one end of the seesaw cam 12 through the action part 11 when the upper frame 4 descends, raises the burring punch 13 through the seesaw cam 12, and removes the window opening part of the work 2 formed in advance. Burring is performed on the peripheral edge of 2a.

The punching section 20 is attached to the inner die 22 attached to the lower end of the hanging portion 21 of the upper frame 4, a cylindrical urethane spring 23 that surrounds the inner die 22 and presses the work 2, and the lower frame 3. And an outer mold 24. The urethane spring 23 has a cylindrical shape, and due to its elasticity, extends below the lower end of the inner mold 22 so as to press the work 2, and when the upper frame 4 descends, the urethane spring 23 presses the work 2 while holding the work 2. Punches out.

The lower frame side boring means 30 is provided below the draw forming portion 2b of the work 2 so as to face the standing wall portion 2c and to move back and forth. In detail, in FIG. 2, the drilling means 30 is an air cylinder for advancing and retracting a drill 31 for cutting and a driving means for independently driving the drill 31, for example, a quill 31 a holding the drill 31. 31
b and an air motor 31c for driving the rotary cutting are integrally provided. In addition, a support means including a guide bush 32 that guides the drill 31 and a guide plate 33 that fixes the guide bush 32 is provided on the lower frame side portion located in front of the drill 31.

A pad 34 for pressing the work 2 against the guide plate 33 is provided on the upper frame 4 side, and a notch 35 for receiving the tip of the drill 31 is provided on the pad 34. The pad 34 is formed by a cam slider (not shown) on the standing wall portion 2c of the drawing forming portion of the work 2.
Move forward and backward.

In the lower frame side punching means 30, the pad 34 advances toward the standing wall portion 2c in conjunction with the lowering of the upper frame 4, presses the work 2 against the guide plate 33, and the upper frame 4 is lowered. The drill 31 is advanced, cut, and retracted in accordance with a command from a control means (not shown) that confirms that the dead point has been reached.
As a result, even when there is not enough space for arranging the cam slider for piercing as in the work 2 shown in FIG. 3, the holes 30a ... Dawn processing can be processed together with other secondary processing.

In FIG. 4, the vertical piercing portion 40 is a piercing punch 41 attached to the upper frame 4 side above the drawing portion 2b.
And a cylindrical urethane spring 42 that presses the work 2 close to the piercing punch 41. The piercing punch 41 is oriented at a right angle to the narrowed portion 2b of the work 2, and the lowering operation of the upper frame 4 makes a hole.

The horizontal piercing portion 43 is provided with a cam slider 44 provided on the side of the work 2, and a piercing punch 45 provided from the cam slider 44 toward the standing wall portion 2d of the narrowing portion 2b.
It consists of a urethane spring 46. Cam slider 44
Is provided with an opposed portion 47 a that comes into contact with the inclined portion 47 on the upper frame 4 side and forms a cam mechanism, and is slidably connected by a pin 48. In addition, a facing portion 49a that comes into contact with the slide portion 49 of the lower frame 3 to form a sliding mechanism is provided.

In the cam slider 44, the facing portion 49a comes into contact with the slide portion 49 of the lower frame 3 by the lowering operation of the upper frame 4, and then the cam slider 44 moves above the slide portion 49 by the cam action of the inclined portion 47 and the facing portion 47a. While moving forward, the work 2 is pressed by the urethane spring 46, and the standing wall portion 2d is drilled by the piercing punch 45.

Further, in FIG. 5, the large-diameter piercing portion 50 has a large-diameter piercing punch 5 on the cam slider 44.
1 and urethane spring 52, and the upper frame 4
A pin 53 and a spring 54 are movably connected between the above and, and an opposing portion 49a forming a sliding mechanism is provided in the lower portion.
The piercing punch 51 is operated by the operation of the cam slider 44 which is interlocked with the lowering operation of the upper frame 4 so that the standing wall portion 2 of the narrowed portion 2b is moved.
Make a large diameter hole in d.

The lifter 60 shown in FIG. 1 is provided with a support portion 61 that is moved up and down by an expandable air cylinder or the like.
It is appropriately arranged on the lower frame 3 side while avoiding the processed portion of the work 2.
The lifter 60 advances the support part 61 to an upper receiving position when receiving the work 2 to be carried in, receives the work 2 carried into the support part 61, and then retracts by a command to lower the work 2 into a lower frame. Set to 3. Further, when the upper frame 4 is lowered to complete all the machining operations and the work 2 is carried out, the work 2 is pushed up again to the upper receiving position.

The operation of the punching device configured as described above will be described below. 6 (a) to 6 (c) and FIG.
(A), (b) is operation | movement explanatory drawing of the punching apparatus of the draw-formed body of this invention.

In FIG. 6 (a), first, the upper frame 4 is made to stand by upward, and the lifter 60 is advanced to raise the support portion 61 to the receiving position. In FIG. 6 (b), the work 2 is carried in by a conveying means (not shown), received by the support portion 61 of the lifter 60, and then the support portion 61 is lowered to set the work 2 at a predetermined position on the lower frame 3. In FIG. 6 (c), the upper frame 4 is lowered, and in conjunction with this upper frame 4, the burring part 10 burrs the window punching part of the work 2, the punching part 20 punches it, and the vertical piercing part 40. , The horizontal piercing portions 43 and 50 are used to form holes in the draw forming portion. In FIG. 7A, after the upper frame 4 reaches the bottom dead center, the lower frame side drilling means 30 is operated,
The vertical wall portion 2c of the draw forming portion of the work 2 that cannot form the lateral piercing portion due to the arrangement of the burring portion 10 and the punching portion 20 is punched. In FIG. 7 (b),
The upper frame 4 is lifted up, and then the work 2 is pushed up to the upper receiving position by the lifter 60 and then carried out by the carrying means.

As described above, the drilling device of the present invention is
After the upper frame reaches the bottom dead center, the vertical wall of the lower frame side is used to make a hole in the vertical wall portion of the draw forming unit, so that the single perforation device moves the upper frame up and down in one stroke operation. A hole is made in the vertical wall portion of the drawing portion.

Therefore, even if the slide cam for the piercing process cannot be arranged, this drilling device can process the drilling of the vertical wall of the draw forming part together with the secondary process linked to the lowering process of the upper frame. Therefore, the work period can be shortened as compared with the case where a hole is formed in another process.

[0031]

According to the first aspect of the present invention, there is provided a method for making a hole in a draw-formed body, wherein the upper wall reaches the bottom dead center after the upper frame reaches the bottom dead center by the hole making means provided on the lower frame side. By performing the above step, a hole is made in the vertical wall portion of the draw forming portion in one stroke operation by raising and lowering the upper frame. Therefore, in this drilling method, even when the slide cam for piercing can not be arranged, it is possible to process the drilling for the standing wall portion of the draw forming portion together with the secondary processing of the lowering process of the upper frame,
The work period can be shortened compared to the case where a hole is formed in another process.

In the method for punching a draw-formed body according to claim 2, since the step of lowering the upper frame is accompanied by burring,
Since the burring process is performed in one stroke operation by raising and lowering the upper frame together with the drilling of the vertical wall portion of the draw forming portion at the bottom dead center, the work period can be shortened.

According to a third aspect of the present invention, there is provided an apparatus for punching a draw-formed body, which is provided in a lower frame for receiving the draw-formed part of the shaped body, and which makes a hole in a standing wall portion of the draw-formed part, and the hole forming means. Since the opening means is provided with the driving means that operates at the bottom dead center of the upper frame, after the upper frame reaches the bottom dead center, the vertical wall of the draw forming section is formed by the hole forming means provided on the lower frame side. Drilling is done, and by this process, the upper frame moves up and down.
Since the vertical wall portion of the drawing portion is punched by the stroke operation, the work period can be shortened.

The lower frame side of the draw-forming apparatus of claim 4 is provided with a drill as a lower frame side hole forming means, and a support means including a guide bush and a fixing guide plate, and an upper frame. Since the pad with the notch is provided on the side, the drill positioning accuracy and the hole diameter accuracy are ensured, so that it is possible to perform highly accurate hole processing and shorten the construction period.

According to the fifth aspect of the present invention, there is provided a burring device for piercing the draw-formed body, which is provided with burring means for lowering the upper frame. Since the machining is performed in one stroke operation by raising and lowering the upper frame, the work period can be shortened.

[Brief description of drawings]

FIG. 1 is a sectional view of a drilling device according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG. 1;

FIG. 3 is a perspective view showing a processing mode by a lower frame side drilling means.

FIG. 4 is a sectional view taken along line AA of FIG. 1;

5 is a sectional view taken along line BB of FIG.

FIG. 6 is an operation explanatory view (first half) of the drilling device according to the present invention.

FIG. 7 is an operation explanatory view (second half) of the punching device according to the present invention.

FIG. 8 is a cross-sectional view of a main part of a drilling device according to a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Drilling processing device, 2 ... Work, 2a ... Window removal part, 2
b ... draw forming part, 2c, 2d ... standing wall part, 3 ... lower frame, 4 ...
Upper frame, 10 ... Burring part, 20 ... Punching part, 30 ...
Lower frame side drilling means, 30a ... Hole, 31 ... Drill, 32 ...
Guide bush (supporting means), 33 ... Guide plate (supporting means), 34 ... Pad, 35 ... Notch, 4
0 ... vertical piercing part, 43 ... horizontal piercing part, 47 ... inclined part (cam mechanism), 47a ... facing part (cam mechanism), 49 ... slide part (sliding mechanism), 49a ... facing part (sliding mechanism), Fifty
... Large-diameter piercing part, 60 ... lifter.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takashi Kiyotaka 1 at 30 Nitta, Koshitsu Town, Tsushima City, Aichi Mizutani Seiki Kogyo Co., Ltd.

Claims (5)

[Claims] 1. A secondary processing method after drawing forming for a thin plate formed body having a draw forming portion, comprising a step of placing the thin plate formed body on a lower frame, and an upper step while pressing the formed body on the lower frame. A lowering step of lowering the frame, and a processing step of, after the upper frame reaches the bottom dead center, perforating the vertical wall portion of the draw forming section by means of the perforating means provided on the lower frame side. A method for drilling a drawn body. 2. The hole in the draw-formed body according to claim 1, wherein the lowering step is accompanied by a burring process in which the burring of the window punching portion of the thin plate-formed body is performed in conjunction with the lowering operation of the upper frame. Dawn processing method. 3. A secondary processing apparatus for performing additional machining to a thin plate molded body having a draw forming section, wherein a lower frame on which the thin plate molded body is placed, and an upper frame which descends while pressing the molded body on the lower frame. And a lower frame side boring means which is mounted in a lower frame for receiving the drawing forming part of the molded body and which makes a hole in the standing wall part of the drawing forming part, and this boring means is independent from the lowering operation of the upper frame. An apparatus for punching a draw-formed body, characterized by comprising: 4. The lower frame is provided with a guide bush leading the cutting drill of the lower frame side drilling means, and a support means including a guide plate fixing the guide bush, and facing the guide plate. The punching device for a draw-formed body according to claim 3, wherein a pad for pressing a work is provided on the upper frame side, and a notch portion for receiving a tip of the drill is formed in the pad. 5. The draw forming apparatus according to claim 3, wherein the punching device is provided with a burring process means for burring the peripheral edge of the window punching portion of the thin plate molded body by the lowering operation of the upper frame. Body drilling device.