JPH10314856A - Method and device for composite working to which link cam is applied - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase productivity, to improve a working precision, and to obtain a stable quality by completing restrike forming and cam pierce forming by one process. SOLUTION: An object W to be worked is mounted on the prescribed place of a lower die 7, is pressed down by a pad 4, and an upper die 1 is lowered. Bending blades 2, 3 are lowered with the lowering of the upper die 1, and the restrike forming is performed on the top end part of the object W. Next, by holding a state in which the object W is pressed down by the pad 4, and by elevating the upper die 1, the cam pierce forming is performed. The rear end part of the link 11 receives an upward force. However, since it has been stopped by a stopper 12, it can not rotate, making a spindle 13 a fulcrum, and it is pressed in the forward direction (left direction) until a guide roller 15 ascends a gradient on the upper side to its top. By this pressing force, a cam slider 9 is slid forward, and by the tool 10 of the tip part of the cam slider 9, the cam pierce forming is performed to the object W.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite machining method and apparatus using a link cam, in which restriking and cam piercing can be completed in one step of pressing.

[0002]

2. Description of the Related Art In some cases, restric-like molding (partial molding) and cam piercing (hole machining) are performed on the end of a workpiece such as an automobile part. In order to perform these moldings, conventionally, FIG.
As shown in (a) and (b), the first step is to carry out restric-like molding, and the second step is to carry out cam piercing. That is, in the restriking molding, the workpiece A is put on the pad B
Curved blades D and E attached to the upper die C of the press
Is to partially form the end of the workpiece A. In the case of cam piercing, the workpiece A is placed in the second
In the process, a hole is drilled from the side with a tool G at the end of the workpiece A by pressing with the pad F.

[0003]

However, according to the above-mentioned conventional processing method, two processes are required because the restriking process and the cam piercing process are separate processes, and there is a problem that productivity is poor. SUMMARY OF THE INVENTION It is an object of the present invention to provide a composite machining method using a link cam and an apparatus therefor, in which restriking and cam piercing can be completed during one step of pressing.

[0004]

Means for Solving the Problems As a technical means for achieving the above-mentioned object, the method of the present invention comprises a method in which a work is pressed against a lower die of a press with a pad, and the work is coated with a curved blade attached to an upper die. While performing restriking on the end of the workpiece, raise the upper die while retracting the workpiece while holding it down with the pad to retract the curved blade, and attach it to the upper die as the upper die rises. By pushing the link of the cam slider attached to the lower die with the provided cam driver, the cam slider is advanced, and cam piercing is performed on the workpiece with a tool attached to the front end of the cam slider. Make a summary. Further, the device of the present invention is a curved blade and a cam driver attached to the upper die of the press, a cam slider attached to the lower die via a spring,
A pad for holding the workpiece, a tool is attached to the front end of the cam slider, a link that performs a seesaw movement is provided at an intermediate portion, and a stopper that stops the link is provided at the rear end, A spring is attached between the link and the cam slider at the tip, a guide roller is attached to the rear end, and the link is engaged with the guide roller of the link at the lower end of the cam driver. The gist is that a cam piece to be operated is provided.

[0005]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes an upper die of a press. Curved blades 2 and 3 are attached to predetermined positions, and a pad 4 is disposed between the curved blades 2 and 3. Further, a cam driver 5 is vertically provided on the side of the upper mold 1, and a substantially triangular cam piece 6 is attached to a lower end thereof.

Reference numeral 7 denotes a lower die of a press, to which a cam slider 9 is attached via a spring 8 so as to be movable in the left-right direction. The cam slider 9 has a drilling tool 10 attached to the front end, a link 11 that moves in a seesaw motion at the center, and a stopper 12 for stopping the link 11 at the rear.

The link 11 has an intermediate portion supported by a support shaft 13 so that the link 11 can perform a seesaw motion with the support shaft 13 serving as a fulcrum. A guide roller 15 that engages with the cam piece 6 of the cam driver 5 is attached to the rear end, and a thrust receiver 11a is formed integrally with the rear upper surface.

[0008] The processing apparatus according to the present invention having the above-described configuration can perform the restri-like forming and the cam piercing on the workpiece W during one pressing step. That is, the workpiece W is placed on a predetermined portion of the lower mold 7, pressed by the pad 4, and the upper mold 1 is lowered to perform first restriking.

In this restriking, the curved blades 2 and 3 are lowered with the lowering of the upper die 1, and the restriking R is performed on the upper end of the workpiece W as shown in FIG. At this time,
As the upper mold 1 descends, the cam driver 5 also descends,
As shown in FIG. 1, the lower inclined surface 6a of the cam piece 6 engages with the guide roller 15 to push down the rear end of the link 11. Further, until the upper die 1 reaches the bottom dead center (FIG. 2), the cam pieces 6
Continues pushing down the rear end of the link 11 against the spring 14, and when the guide roller 15 moves up the lower inclined surface 6a, the cam piece 6 passes.

Then, the front end of the link 11 is pulled downward by the restoring force of the spring 14, and the link rotates counterclockwise about the support shaft 13 and comes into contact with the stopper 12 to be stopped in a horizontal state. (FIG. 2).

Next, while the workpiece W is held down by the pad 4, the upper die 1 is raised to perform cam piercing. In this cam piercing, the curved blades 2 and 3 rise and retreat from the workpiece W with the rise of the upper die 1, and the cam driver 5 also rises and the upper inclined surface 6 b of the cam piece 6 becomes the link 11. Guide roller 1
5 is engaged.

At this time, the rear end of the link 11 receives an upward force, but cannot rotate around the support shaft 13 because it is stopped by the stopper 12, and the guide roller 15 rises up the upper inclined surface 6b. Until it is pushed forward (to the left). At this time, the slide receiver 11a is in contact with the stopper 12 as shown in FIG.
3 can be reduced.

The pressing force causes the cam slider 9 to move.
Is slid forward against the spring 8, and FIG.
As shown in the figure, the workpiece W is formed with the cam piercing P by the tool 10 at the tip of the cam slider 9.

When the upper die 1 further rises from the state shown in FIG. 3 to the top dead center, although not shown, the cam piece 6 passes, the pressing force on the guide roller 15 is released, and the spring 8 restores the force. The cam slider 9 is moved rearward (rightward) and returns to the original position. This is the 1st press
In this step, the processed workpiece W is taken out, the next workpiece is placed on the lower mold 7, and the pressing step is repeated and continued in the manner described above.

In this way, by the link cam system in which the link and the cam are combined, it is possible to perform the restriking forming R and the cam piercing forming P on the workpiece W during one pressing step, so that the working efficiency is improved. It is possible to significantly improve. In addition, it is possible to save time and effort for transferring a workpiece from the first step to the second step,
Since the re-positioning in the process can be omitted, the processing accuracy is also improved.

[0016]

As described above, according to the present invention,
Since the restriking molding and cam piercing molding can be completed in one step, excellent effects such as an increase in productivity and an improvement in processing accuracy and quality stability can be achieved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a main part showing a state when an upper mold of an apparatus is lowered in one embodiment of the present invention.

FIG. 2 is a sectional view of a main part showing a state when the upper die reaches a bottom dead center.

FIG. 3 is a cross-sectional view of a main part showing a state when the upper die is raised.

FIGS. 4A and 4B are explanatory diagrams of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Upper mold 2, 3 ... Curved blade 4 ... Pat 5 ... Cam driver 6 ... Cam piece 7 ... Lower mold 8 ... Spring 9 ... Cam slider 10 ... Tool 11 ... Link 12 ... Stopper 13 ... Support shaft 14 ... Spring 15 ... guide roller

Claims (2)

[Claims] 1. A workpiece is pressed against a lower die of a press with a pad, and an end of the workpiece is formed by a curved blade attached to an upper die, and the workpiece is pressed with a pad. The cam is lifted by raising the upper die while retracting the curved blade, and pressing the link of the cam slider mounted on the lower die with a cam driver mounted on the upper die as the upper die rises. Move the slider forward,
A compound machining method using a link cam, wherein cam piercing is performed on the workpiece using a tool attached to a front end of the cam slider. 2. A cam blade comprising a curved blade and a cam driver attached to an upper die of a press, a cam slider attached to a lower die via a spring, and a pad for pressing a workpiece, wherein the cam slider has a front end. A tool is attached to the part, a link that performs a seesaw movement is provided in the middle part, a stopper that stops the link is provided at the rear end, and a spring is attached to the link at the tip with the cam slider. A guide roller is attached to a rear end of the link cam, and a cam piece for operating the link by engaging the guide roller of the link is provided at a lower end of the cam driver. Combined processing equipment applied.