JP3387207B2 - Cam type for press - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention utilizes a cam having an inclined cam surface to change a pressing force in a downward direction of a press machine into a pressing force in a transverse downward direction intersecting with the press machine to form a hole. The present invention relates to a cam mold for a press that performs processing such as opening, shearing, and bending.

[0002]

2. Description of the Related Art In this type of press cam die, a cam slide having a cam surface inclined obliquely downward and movably supported on an upper die of a press machine and inclined obliquely upward. A cam driver with a cam surface is fixed to the lower die of the press machine, the cam slide is lowered toward the cam driver, the cam surface of the cam slide is brought into contact with the cam surface of the cam driver, and the cam of the cam driver By sliding the cam surface of the cam slide against the surface, the cam slide is moved diagonally downward and laterally intersecting the downward direction, and the tool attached to the tip of the cam slide is used for punching and other work. I am trying to do it at the same time. In the above-mentioned press cam type, since the cam driver is fixed to the lower die of the press machine, it is necessary to carry in the workpiece from the preceding process to the pressing process and to carry it out to the subsequent process. By an automatic machine called a gripper arranged along the line, the loading of the loaded workpiece on the lower mold and the removal of the workpiece from the lower mold are performed by a lifter provided on the lower mold, respectively. It is done automatically.

[0003]

By the way, in the above-mentioned pressing cam die, since the cam driver is fixed to the lower die of the press machine, the loaded workpiece is placed on the lower die and the lower portion of the die. Removal of the work piece from the mold must be performed by moving the lifter up and down a lot, and if the lifter moves up and down in this way, the stability of the work piece deteriorates and misgripping may occur. . If mis-grip occurs, it will be difficult to carry out the work piece from the press machine well, and in addition, the lower die will have to have an opening for the lifter, and the work time of the gripper and the work time of the lifter will have to be increased. Therefore, there is a problem that the press work time is relatively long.

The present invention has been made in view of the above points, and an object thereof is to make it possible to reduce the vertical movement of the lifter and, in some cases, to omit the lifter.
An object of the present invention is to provide a pressing cam die that can solve the above problems caused by the combination of a gripper and a lifter.

[0005]

According to the present invention, the above object is to provide a cam slide having a cam surface which is inclined obliquely downward and support means for movably supporting the cam slide with respect to an upper die. A spring driver for urging the cam slide to an initial position, a cam driver having a cam surface slantingly facing upward and slidably in surface contact with the cam surface of the cam slide, and a cam driver of the cam driver. This is achieved by a press cam die that restricts lateral movement and that includes a hanging means that suspends a cam driver in an upper die so as to be vertically movable.

[0006] One example of the supporting means includes a base fixed to the upper die and a rod having both ends supported by the base and penetrating the cam slide. A bush whose outer peripheral surface is fixed to the cam slide and whose inner peripheral surface slidably contacts the outer peripheral surface of the rod may be arranged in the through hole of the cam slide. Further, when the supporting means is formed of a rod, if the spring means is constituted by a coil spring arranged concentrically with the rod, a compact pressing cam die can be provided. Even when the supporting means is not formed of a rod, the coil spring may constitute the spring means.
Further, when the supporting means is formed by the base and the rod, the rod may be configured by a square rod, an elliptic rod, etc., so that the cam slide does not rotate around the rod, but instead of this, A guide surface may be formed on the base to slidably contact the upper surface of the cam slide to guide the movement of the cam slide and prevent the cam slide from rotating around the rod.

In a preferred example of the suspending means, one end is connected to the upper mold and the other end is movably engaged with a vertical groove formed in the cam driver, and one end is connected to the cam slide. A second connecting member that is fixed and has the other end movably engaged with an inclined groove formed in the cam driver, and lateral movement of the cam driver is restricted by the first connecting member. ing.

According to the present invention, in addition to the above structure, a positioning means for positioning the lowered cam driver may be provided between the lower die and the lower portion of the cam driver. A preferable example of this positioning means includes a triangular groove formed in the lower part of the cam driver, and a positioning base fixed to the lower mold having a triangular protrusion that fits into the triangular groove. However, instead of this, a triangular protrusion is formed in the lower part of the cam driver, and a triangular groove that fits into the triangular protrusion of the cam driver is formed in the upper part of the positioning base. Good.

[0009]

In the press cam die according to the present invention, the cam slide is attached to the upper die through the support means and is lowered together with the operation of the ram of the press machine. In this descent, when the cam driver suspended by the suspending means in the upper mold comes into contact with the lower mold, the descent of the cam driver is stopped. At this stop, the cam slide arranged at the initial position by the spring means is guided by the cam surface of the cam driver and slid obliquely downward, whereby, for example, a hole is formed by a tool provided at the tip of the cam slide. . After drilling, when the cam slide is raised, the cam driver is also raised.

The invention will now be described in more detail with reference to the preferred embodiments shown in the drawings. The present invention is not limited to these specific examples.

[0011]

SPECIFIC EXAMPLE In FIGS. 1 to 4, a cam die 1 for press of this example has a cam slide 3 having a cam surface 2 which is inclined obliquely downward and an upper die 4 having the cam slide 3 in the A direction. Support means 5 for movably supporting the cam slide 3, spring means 6 for biasing the cam slide 3 to the initial position, and slidable surface contact with the cam surface 2 of the cam slide 3, slantingly facing upward. A cam driver 8 having a cam surface 7 and a suspending means 9 for restricting the movement of the cam driver 8 in the lateral direction B and for suspending the cam driver 8 in an upper mold in a vertically movable manner are provided.

The supporting means 5 is supported by the base 22 by fixing the base 22 fixed to the upper die 4 by bolts 21 and the through holes 25 and 26 formed in the base 22 at both ends 23 and 24, respectively. The rod 27 penetrates a through hole 28 formed in the cam slide 3 and supports the cam slide 3 movably in the A direction. In the through hole 28, the outer peripheral surface 31 has the cam slide 3
A bush 34, which is fixed to the inner peripheral surface 32 of the rod 27 and slidably contacts the outer peripheral surface 33 of the rod 27, is provided. A flat surface 23a is formed at one end 23 of the rod 27 so that the rod 27 does not rotate with respect to the base 22, and a flat surface is also formed in the through hole 25 so as to correspond to the flat surface 23a. ing.

The cam slide 3 has a flat upper surface 36 slidably in contact with the flat guide surface 35 of the base 22. In operation, the cam slide 3 is guided by the guide surface 35 so that the cam slide 3 moves in the A direction. Be moved. In the present example, the A direction is directed slightly obliquely upward with respect to the lateral direction B, but the present invention is not necessarily limited to this, and the A direction may be parallel to the B direction. At the tip of the cam slide 3, the drilling tool 3
7 etc. can be attached.

The spring means 6 comprises a coil spring 41 arranged concentrically with the rod 27, and one end 42 of the coil spring 41.
Is in contact with the side wall 43 of the base 22, and the other end 44 is in contact with the wall surface 46 of the circular recess 45 formed in the cam slide 3. The cam slide 3 is in contact with the side wall surface 47 of the base 22 at the initial position by the spring force of the coil spring 41.

In the suspension means 9 of this embodiment, one end 50 is fixed to the base 22 by a bolt 51, and the other end 52 is movably engaged in a vertical groove 53 formed in the cam driver 8 in the vertical direction C. The first connecting member 54 and the one ends 55 and 56 thereof are fixed to the side surfaces 57 and 58 of the cam slide 3 by bolts 59 and 60, and the protruding other ends 61 and 62 thereof are the side surface 63 and the side surface 63 of the cam driver 8, respectively. 64
And a pair of second connecting members 67 and 68 slidably engaged with the inclined grooves 65 and 66 formed in the direction D in the D direction. Of the side face 72 of the cam driver 8 in the lateral direction B
Regulates the movement of. The projection 73 at the one end 50 of the connecting member 54 is formed in the groove 74 formed in the base 22 so that
The protruding ends 75 and 76 of the cams 68 and 68 are fitted in the grooves 77 and 78 formed in the side surfaces 57 and 58 of the cam slide 3.

The pressing cam die 1 of this example further includes a lower die 8
1 and the lower portion 83 of the cam driver 8 are provided, and the positioning means 84 for positioning the lowered cam driver 8 is the cam driver 8
The lower part 83 has a triangular groove 85, and a triangular protrusion 86 that fits in the triangular groove 85, and a positioning base 88 fixed to the lower die 81 by a bolt 87.

The press cam mold 1 formed as described above
The operation of will be described with reference to FIGS. 5 to 7 as well.
In the initial position, the upper die 4 and the cam slide 3 are arranged upward as shown in FIG. 5, and the cam driver 8 suspended from the upper die 4 via the base 22 and the cam slide 3 is also upward. It is located in. In this state, the workpiece 91 is gripped by the gripper 92, moved from the previous step, and carried in onto the lower die 81, and the workpiece 91 is placed on the lower die 81 as the gripper 92 descends. After this placement, the upper die 4, the cam slide 3 and the cam driver 8 are lowered together with the operation of the ram of the press machine, and this lowering causes the cam driver 8 to be positioned on the positioning base 88 as shown in FIG. The cam driver 8 is prevented from descending. As a result, the cam slide 3 is guided to the cam surface 7 by the surface contact between the cam surfaces 2 and 7, and slides in the D direction as shown in FIG. 7 to move the drilling tool 37 to the workpiece 91.
Then, the workpiece 91 is punched by the punching tool 37. After this drilling, the upper die 4, the cam slide 3 and the suspended cam driver 8 are raised by the reverse operation of the ram of the press machine, and the cam slide 3 urged by the coil spring 41 during this rise.
Is returned to the initial position by being guided by the cam surface 7, so that the suspended cam driver 8 is lowered relative to the cam slide 3. Finally, the cam slide 3 and the like are arranged at the initial position shown in FIG. After that, the work piece 91 is gripped by the operation of the gripper 92 again, lifted from the lower die 81 and removed, and then the work piece 91 is carried out as the gripper 92 moves. The above operation is repeated for the new workpiece 91.

By the way, in the pressing cam die 1, the cam driver 8 is not provided in the lower die 81 as in the conventional case, and the cam slide 3 is suspended at the initial position of the cam slide 3 and arranged above. The vicinity of the upper surface becomes a sufficiently large space, and the gripper 92 directly carries the work piece 91 onto the lower die 81 without the avoidance operation of the cam driver 8, in other words, without passing through the lifter, and places the workpiece 91 on the lower die 81. Further, the workpiece 91 can be removed and carried out by the gripper 92 without using the lifter. Further, even when the lifter is provided, the vertical movement of the lifter can be reduced, and as a result, the stability of the work piece 91 placed on the lifter can be obtained.

Although the pressing cam die 1 is provided with the positioning means 84, as shown in FIG. 8, the positioning means 84 is omitted and the lower surface of the cam driver 8 is directly attached to the lower die 81.
You may make it contact | abut with and perform the same operation as the above.

[0020]

As described above, according to the present invention, since the cam driver is suspended, the upper surface of the lower die can be made a large space, and as a result, the workpiece can be carried into the press machine only by the gripper. In addition to being able to carry it out, the work piece can be placed on and removed from the lower mold, thus eliminating the need for a lifter. It can be performed at high speed and productivity can be improved. Further, even when the lifter is provided, since the vertical movement of the lifter can be reduced,
The stability of the work piece can be increased, the risk of mis-grip can be eliminated, and the vertical operation time of the lifter can be shortened. As a result, the press work can be speeded up and the productivity can be improved.

[Brief description of drawings]

FIG. 1 is a side view illustrating a preferred embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II of the specific example shown in FIG.

FIG. 3 is a sectional view taken along the line III-III of the specific example shown in FIG.

FIG. 4 is a left side view of the specific example shown in FIG.

5 is an operation explanatory diagram of the specific example shown in FIG. 1. FIG.

FIG. 6 is an operation explanatory diagram of the specific example shown in FIG. 1.

FIG. 7 is an operation explanatory diagram of the specific example shown in FIG. 1.

FIG. 8 is an explanatory diagram of another preferred embodiment of the present invention.

[Explanation of symbols]

1 Press cam type 2 Cam surface 3 cam slide 4 Upper mold 5 Supporting means 6 Spring means 7 Cam surface 8 cam driver 9 Suspending means

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Claims (8)

(57) [Claims] 1. A cam slide having a cam surface inclined obliquely downward, supporting means for movably supporting the cam slide with respect to an upper die, and spring means for urging the cam slide to an initial position. And a cam driver having a cam surface slantingly facing upward and slidably in surface contact with the cam surface of the cam slide, and restricting the lateral movement of the cam driver, and And a suspending means for suspending vertically .
One end is connected to the upper mold and the other end is formed on the cam driver
A first connecting member movably engaged with the vertical groove,
One end is fixed to the cam slide and the other end is connected to the cam driver.
Second connecting member slidably engaged with the formed inclined groove
And the first connecting member has a cover on its side surface.
The side contact of the cam driver causes the cam driver to move laterally.
Cam type for presses that regulate movement . 2. The supporting means includes a base fixed to the upper mold,
The press cam die according to claim 1, further comprising: a rod having both ends supported by the base and penetrating the cam slide. 3. A bush having a peripheral surface fixed to the cam slide and an inner peripheral surface slidably contacting the outer peripheral surface of the rod is disposed in the through hole of the cam slide through which the rod penetrates. Cam type for press described. 4. The press cam die according to claim 2, wherein the base has a guide surface on which the upper surface of the cam slide slidably contacts and guides the movement of the cam slide. 5. The pressing cam die according to claim 2, wherein the spring means comprises a coil spring arranged concentrically with the rod. 6. The spring means comprises a coil spring.
Cam type for press described in . 7. Between the lower mold and the lower part of the cam driver,
Press cam die according to any one of claims 1 to positioning means for positioning the lowered by cam drivers are provided 6. 8. The positioning means comprises a triangular groove formed in the lower portion of the cam driver, and a positioning base fixed to the lower die, having a triangular protrusion that fits in the triangular groove. The press-use cam die according to claim 7 .