JP2002066662A - Press die construction - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a press die construction capable of performing a deep drawing, a flange bending and a high precision punching. SOLUTION: A press die construction provided in the lower die 1 with a lower die cushion pat 3 capable of moving up and down to set a workpiece W in the lower die 1, a lower die bending blade 4 which bends and forms the edge of the workpiece, a lock cam 12 to lock the lower die cushion pat 3 into the lower die in the downward end of the lower die cushion pat 3, a lock cum fixed member 17 to constrain a rise of the lock cam 12 which locks the lower cushion pat 3 and provided in the upper die 2 with an upper die cushion pat 18 to fix the workpiece W set in the lower die cushion pat 3, a hanging cam 20 having a punch 21 to punch the workpiece W and a cum driver 23 which transfers the lock cam 12 forward in the direction of the lower die cushion pat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process for forming an edge of a panel-like workpiece by deep drawing and flange bending, and punching in one axial direction in a direction perpendicular to an inclined surface of the workpiece. It relates to a press die structure.

[0002]

2. Description of the Related Art A press die in which a panel-like work is formed by bending and a hole is formed in one axial direction in a direction perpendicular to the bending surface by one die is disclosed in, for example, Japanese Utility Model Application Laid-Open No. 61-172.
It is provided in No. 29.

[0003]

The above-mentioned conventional press die is formed by bending a panel-shaped work set on a punching die fixed to a lower die with a curved blade of an upper die, and raising the inclined surface of the bent-formed work upward. The passive cam (upper suspension cam) provided on the mold is moved forward by contacting the fixed cam provided on the lower mold, and is punched by a punch provided on the passive cam.

[0004] In the case where a panel-shaped work is simply bent and formed, the above-mentioned conventional press die can be used. However, when the edge of the work W is deep drawn P and the flange F is bent and formed as shown in FIG. It is impossible with the above conventional press mold,
In order to perform the deep drawing P, a lower cushion pad 3 that moves up and down is required.

However, in the case of the upper suspension cam, if the lower cushion pad 3 is slightly tilted by about 0.02 to 3 mm, the punch and the punching die become misaligned, resulting in hole burrs and defective products. In addition, when there is a large misalignment between the punch and the punching die in addition to the product defect, the punch is broken or the punching die is damaged. The inclination of the lower cushion pad 3 occurs because the work W is offset with respect to the center of the lower cushion pad 3 and thus the lower cushion pad 3 is inclined while the lower cushion pad 3 is being pushed down. .

SUMMARY OF THE INVENTION It is an object of the present invention to provide a press die having a lower die pad and capable of deep drawing, flange bending, and highly accurate punching.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is to form an end of a work set in a lower mold by bending and forming a hole in an axial direction perpendicular to an inclined surface of the work. A press die, a punching die in the lower die, a lower cushion pad that can move up and down to set a work having a sloped cam having a downward slope toward the punching die near the punching die, A lower curved blade for bending an edge of the work, a locking cam movable forward and backward with respect to the lower cushion pad and locking the lower cushion pad to the lower die at a lower end of the lower cushion pad; An upper-type cushion pad, comprising: a locking-cam fixing member that restrains a rise of a locking cam that locks the type-cushion pad; and an upper die that presses a work set on the lower-type cushion pad. An upper suspension cam having a punch corresponding to the punching die and moving forward by contacting the inclined cam; and a cam driver contacting the locking cam and moving the locking cam forward in the lower mold pad direction. It is characterized by having.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In the press die according to the present invention, as shown in FIG. 2, the edge of the panel-shaped work W is deep drawn P to form a flange F, and the hole is punched in the axial direction perpendicular to the inclined surface S of the work W. To manufacture products. In FIG. 1, 1 is a fixed lower die, and 2 is an upper die that moves up and down.

The lower die 1 includes a lower cushion pad 3.
And a lower curved blade 4 for deep drawing the edge of the work W to bend the flange F upward, and a lock for locking the lower cushion pad 3 to the lower mold 1 at the lower end of the lower cushion pad 3. A cam 12 and a locking cam fixing member 17 for restraining the raising of the locking cam 12 that locks the lower die pad 3 are provided.

The lower cushion pad 3 can move up and down by abutting on an upright surface 5a at one side end of the lower mold 1, and a lower surface of the lower cushion pad 3 and a lower mold 1 facing the lower cushion pad 3.
A spring 6 for urging the lower cushion pad 3 upward is interposed therebetween.

A punching die 7 is provided on the upper surface of the lower cushion pad 3, and an inclined cam 8 having a downward slope toward the punching die 7 is provided near the punching die 7. Further, an inclined surface 9 with which the locking cam 12 abuts is formed below the side of the lower cushion pad 3 at a side opposite to the abutting surface 5a on one side end of the lower mold 1 of the lower mold 1. Have been. In addition, a scrap chute 11 provided in the lower mold 1 is provided with a scrap drop passage 10 opening from the punching die 7 to the lower surface of the lower cushion pad 3.
Is provided in correspondence with.

The locking cam fixing member 17 is fixed to a position immediately above the inclined surface 9 formed on the lower cushion pad 3.

The locking cam 12 is disposed on the side of the inclined surface 9 formed on the lower cushion pad 3 so as to be movable forward and backward with respect to the lower cushion pad 3. At the front of the locking cam 12, a lower inclined cam surface 15 abutting on the inclined surface 9 formed on the lower cushion pad 3 and an upper horizontal surface abutting on the lower surface of the locking cam fixing member 17. A cam surface 16 is provided,
A driver cam 23 to be described later is provided at a rear portion of the locking cam 12.
There is provided an inclined cam surface 14 with which the abutment comes into contact. A spring 13 for urging the locking cam 12 in the backward direction is interposed between the locking cam 12 and the lower mold 1.

On the other hand, the upper mold 2 has an upper cushion pad 18 for holding the work W set on the lower mold cushion pad 3 for deep drawing P, and a punch 21 corresponding to the punching die 7. An upper suspension cam 20 which comes into contact with the cam 8 and moves forward, and a cam driver 23 which comes into contact with the lock cam 12 and moves the lock cam 12 forward in the direction of the lower cushion pad 3.

The upper cushion pad 18 is inconsistent with the lower curved blade 4 and, in cooperation with the lower curved blade 4, deep-draws P the edge of the work W to bend the flange F upward. Type 2
And is urged downward by a spring 19.

The upper suspension cam 20 is held by a cam holder 22 fixed to the upper die 2 so as to be able to move forward and backward.

The cam driver 23 includes an inclined cam surface 25 that contacts an inclined cam surface 14 formed at a rear portion of the locking cam 12 and a lower die 1 behind the locking cam 12.
And a vertical cam surface 24 that abuts the upright surface 5b at the other side end.

The operation of the press die structure of the present invention will be described. FIG. 1 shows a state where the upper die 2 is located at the top dead center. In this state, the upper cushion pad 18 of the upper mold 2 is formed.
Is pressed downward by a spring 19, and the upper suspension cam 20 is at a retracted position. The cam driver 23 is located above and spaced apart from the locking cam 12.

On the other hand, the lower cushion pad 3 of the lower die 1 is located at the raised end by the spring 6, and the locking cam 12 is located at the retracted end by the spring 13.

In such a state, the work W preformed in the previous step is set on the portion of the punch die 7 of the lower die cushion pad 3 and the upper die 2 is started to descend. FIG.
Is a state in which the upper mold 2 is being lowered. As the upper mold 2 descends, the upper cushion pad 18 comes into contact with the work W on the lower cushion pad 3 to hold down the work W and lower the lower cushion pad 3 against the bias of the spring 6. At this time, the upper cushion pad 18 is
In cooperation with the lower curved blade 4, the edge of the work W is deep drawn P and the flange F is bent upward.

At the same time as or slightly after the lowering of the lower cushion pad 3, the inclined cam surface 25 of the cam driver 23 comes into contact with the inclined cam surface 14 of the locking cam 12, and the vertical cam surface 24 of the cam driver 23 is lowered. Elevation surface 5 at the other side end of 1
b, the locking cam 12 advances. As the locking cam 12 advances, the lower inclined cam surface 15 in front of the locking cam 12 starts to contact the inclined surface 9 formed on the lower cushion pad 3, and the upper horizontal cam surface 16 locks. The contact with the lower surface of the cam fixing member 17 is started. During the lowering of the upper mold 2, the upper suspension cam 20 does not contact the inclined cam 8 and maintains the retracted end position. That is, punching by the punch 21 is not performed.

Further, as the upper mold 2 descends, the lower mold pad 3 reaches the descending end as shown in FIG. When the lower cushion pad 3 is at the lower end, the lower inclined cam surface 15 of the locking cam 12 completely rides on the inclined surface 9 of the lower cushion pad 3 and the upper horizontal cam surface 16 is the lower surface of the locking cam fixing member 17. And the lower cushion pad 3 is locked to the lower mold 1. In this locked state, the upward movement of the locking cam 12 is restricted by the locking cam fixing member 17, and the backward movement is also restricted by the cam driver 23. Accordingly, the lower cushion pad 3 locked by the locking cam 12 is in a state in which the lower cushion pad 3 is not inclined but also slightly moved.

After the lower cushion pad 3 is locked, the upper mold 2 descends to the bottom dead center. At this time, the upper suspension cam 20 contacts the inclined cam 8 and moves forward to
1 advances toward the punching die 7 to perform punching in an axial direction perpendicular to a predetermined portion of the inclined surface S of the work W.
Further, the upper die pad 18 compresses the spring 19 and moves relative to the lowering of the upper die 2, and the deep bending P of the edge of the work W and the upward bending of the flange F are completed by the lower bent blade 4.

The scrap punched by the punch 21 and the punching die 7 falls through the scrap drop passage 10 and is discharged by the scrap chute 11 into a scrap storage box installed outside the lower mold 1 (not shown).

[0025]

As described above, according to the present invention, there is provided a press die in which a panel-shaped work edge is deep drawn, a flange is bent, and a hole is punched in an axial direction perpendicular to an inclined surface of the work. The lower suspension pad is locked by the locking cam at the lower end of the lower cushion pad, and the upper suspension cam is moved forward to punch the workpiece with a punch. Is ensured and the mold does not break. In addition, since the locking cam for locking the lower cushion pad restrains the upward movement by the locking cam fixing member and the backward movement is restrained by the cam driver, the lower cam pad can be securely locked by the locking cam. have.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an upper die of a press die structure of the present invention in a state of a top dead center.

FIG. 2 is a cross-sectional view of the press die structure of the present invention in a state where the upper die is being lowered.

FIG. 3 is a cross-sectional view of the upper die of the press die structure of the present invention in a lower point state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Lower die 2 Upper die frame garnish 3 Lower die cushion pad 4 Lower die curved blade 5a One raised surface 5b The other raised surface 7 Hole punching die 8 Inclined cam 9 Inclined surface 12 Locking cam 13 Spring 14 Inclined cam surface 15 Lower Side inclined cam surface 16 Upper horizontal cam surface 17 Locking cam fixing member 18 Upper cushion pad 20 Upper hanging cam 21 Punch 22 Cam holder 23 Cam driver

Claims (1)

[Claims] 1. A press die for bending an edge of a work set in a lower die and punching the hole in an axial direction perpendicular to an inclined surface of the work. A lower die cushion pad that has an inclined cam descending toward the punching die toward the punching die and that can move up and down to set a work; a lower die curved blade that bends and forms an edge of the work; A lock cam that can move forward and backward with respect to the lower cushion pad and locks the lower cushion pad to the lower mold at the lower end of the lower cushion pad, and a lock that restrains the elevation of the lock cam that locks the lower cushion pad. An upper cushion pad for holding a work set on the lower cushion pad in an upper mold, and a punch corresponding to the punching die. A press-type structure comprising: an upper suspension cam that moves forward by contacting the locking cam; and a cam driver that moves the locking cam forward by moving the locking cam toward the lower mold pad in contact with the locking cam.