JP3454198B2 - 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 apply a pressing force in one direction such as a downward direction of a press machine to a pressing force in another direction such as a lateral direction which intersects the pressing force. Instead of the above, the present invention relates to a cam type for press that performs processing such as drilling, shearing, and bending.

[0002]

Conventionally, as a cam type for a press of this type, for example, a vertical direction operation of a cam driver arranged in an upper die as disclosed in Japanese Utility Model Publication No. 1-263838 is employed. Along with this, the cam slide is reciprocally moved in the lateral direction, and press work is performed by a punch attached to the cam slide.

By the way, in the press cam type disclosed in Japanese Utility Model Publication No. 1-263838, the disassembly and maintenance work is extremely poor.

The present invention has been made in view of the above points, and an object of the present invention is to provide a pressing cam die which is excellent in disassembly and assembly.

[0005]

According to the present invention, the above object is to provide a cam guide having a guide bar having a circular cross section , a cam slide to be guided by the cam guide, and a cam slide to which a working tool is attached. One end is a cam so that it is interposed between the cam guide and the cam slide to urge the cam slide.
A coil spring in contact with the guide, a cam driver in contact with the cam slide to drive the cam slide, and a coil spring
To hold the contact position of one end of the
A cam with a disk-shaped part surrounded by one end of the spring
Guide has and a fixed spring position holding member, the cam slide is slidably supported via a bearing gas Idoba, discoid portion of the spring position holding member that
It has a conical part that is integrally formed on the end face.
Surface of the coil spring forms an alignment surface that aligns one end of the coil spring.
It is achieved by the cam type for press.

In the pressing cam type of the present invention, the bearing is composed of a pair of bush bearings, and the pair of bush bearings are slidable on the guide bar at the inner surface in the through hole of the cam slide through which the guide bar penetrates. And is fixed to the cam slide on the outer surface. Further, in the pressing cam type of the present invention, the coil spring is arranged so as to extend parallel to the guide bar.

[0007]

In the pressing cam die of the present invention, for example, a cam driver is fixed to the upper die and a cam guide is fixed to the lower die. In this state, when the ram of the press machine operates and the cam surface of the cam driver slides down against the cam surface of the cam slide and the cam driver moves downward, the cam slide is pressed by the cam driver and the moving direction of the cam driver moves. The work piece is moved in a direction intersecting with and against the urging force of the urging body, and by this movement, the work piece is processed by a processing tool such as a punch attached to the cam slide. After that, as the ram of the press machine rises, the cam driver is raised, and at the same time, the cam slide is retracted to the initial position by being biased by the biasing body.

The present invention will be described below based on preferred embodiments shown in the drawings. This will make the above invention and other inventions clear.

The present invention is not limited to these specific examples.

[0010]

1 and 2, a cam guide 1 includes a base portion 2, a front wall portion 3 and a rear wall portion 4 provided upright at both ends of the base portion 2, and both ends thereof having a front wall portion 3 and a rear wall portion, respectively. Screws 4 and 5 on part 4
And a cylindrical guide bar 7 fixed by. Through holes 8 and 9 are formed in the base 2, and the through holes 8 and 9 are formed.
The cam guide 1 is fixed to, for example, the lower die of the press by screws or the like inserted in the and 9.

The cam slide 10 movably arranged in the direction A on the base portion 2 of the cam guide 1 includes a main body 11 and a main body 1.
The lower plate 12 is attached to the lower surface of the main body 1 and the shock absorbing member 13 is attached to the rear end. The guide bar 7 penetrates through the through hole 14 formed in the main body 11.
An inclined cam surface 15 is formed at one end of the. The lower surface 16 of the lower plate 12 is slidably in contact with the upper surface 17 of the base 2 in the A direction, and a bush in which a solid lubricant is preferably embedded between the main body 11 and the guide bar 7 in the through hole 14. Bearings 18 and 19 are fixedly provided on the main body 11. With the cam slide 10, with this configuration, A
Its movement in the direction is guided by the guide bar 7 and its rotation about the guide bar 7 is blocked by the base 2. At the front end of the through hole 14, the dust seal ring 20
Is fitted and the ring 20 prevents dust from entering the through hole 14.

The cam driver 21 has through holes 22 and 23.
Main body 2 having at one end a flange portion 24 formed with and a cam surface 25 that makes surface contact with the cam surface 15 of the cam slide 10.
6 and the cam driver 21 is B which is orthogonal to the A direction.
Cam surfaces 25 and 15 that come into surface contact with each other by movement in the direction
The cam slide 10 is moved in the A direction on the base portion 2 of the cam guide 1 via. The lower portion 27 of the main body 26 is bifurcated so as to straddle the guide bar 7. The cam driver 21 is fixed to, for example, the upper die of the press via screws inserted into the through holes 22 and 23.

The cam slide 10 is attached to the base 2 of the cam guide 1.
The coil spring 28, which is an urging member that returns to the upper initial position, that is, the left end in FIG. It is arranged and provided on the bottom surface of the recess 31 provided in the main body 11 of the device 10.

The spring position holding member 32 for holding the contact position of the one end 29 of the coil spring 28 with the side surface of the front wall portion 3 of the cam guide 1, as shown in detail in FIG.
And a frusto-conical portion 34 integrally formed on the end surface of the disc-shaped portion 33, and a columnar portion 35 integrally formed on the disc-shaped portion 33 on the opposite surface on which the frusto-conical portion 34 is provided. The spring position holding member 32 includes a frusto-conical portion 34 and a disc-shaped portion 3.
3, one end of which is surrounded by one end 29 of the coil spring 28, and the other end of which is a columnar portion 35 is the cam guide 1.
Is press-fitted and fixed in a through hole 36 formed in the front wall portion 3 of
Main body 11 of cam slide 10 and front wall portion 3 of cam guide 1
It is located between and. When the spring position holding member 32 is formed by having the truncated cone-shaped portion 34 as in this example, the conical surface 37 of the truncated cone-shaped portion 34 has the end portion 2 of the coil spring 28.
When the one end 29 rides on the surface 37 in the position variation of 9, it acts to return it to its original position, in other words, to align the one end 29. Further, in order to prevent the one end 29 from easily climbing up on the disc-shaped portion 33, the disc-shaped portion 33 is formed in this example so that its thickness W is substantially equal to the wire diameter R of the coil spring 28. . The inclination angle 39 of the conical surface 37 is about 15 degrees in this example. The tip of the cylindrical portion 35 is formed with a tapered surface 38 to facilitate press fitting of the cylindrical portion 35 into the through hole 36.

In this example, as is clear from FIG. 2, the cam guide 1, the cam slide 10 and the cam driver 21 are formed so that their lateral widths are all the same.

The press cam die 50 having the above structure
Then, a machining tool such as a punch 52 is attached to the front surface 51 of the main body 11 of the cam slide 10 for use.
Then, the cam driver 2 fixed to the upper mold in the initial position
1, the cam slide 10 is located to the left of the base 2 of the cam guide 1 fixed to the lower die in FIG. 1, and the cam driver 21 is lowered with the operation of the ram of the press machine. And the cam surface 25 of the cam driver 21
Is lowered while slidingly contacting the cam surface 15 of the cam slide 10. As the cam driver 21 descends, the cam slide 10 is moved by pressing the cam surface 15 of the cam surface 25 by the cam surface 25 of the cam driver 21 in the direction A, that is, pressing the coil spring 28 to the right in FIG. As a result of the inner surfaces of the bush bearings 18 and 19 making sliding contact with the surface of the guide bar 7 during this movement, the cam slide 10 is guided and moved by the guide bar 7. The punch 5 is driven by the forward movement of the cam slide 10.
In 2, the work piece is processed. After that, when the ram of the press machine is operated and the cam driver 21 is moved upward, the cam slide 10 has the shock absorbing member 13 attached to the rear surface of the main body 11 by the elastic force of the coil spring 28. The cam driver 21 is moved until it comes into contact with 4, and is returned to the initial position, and then the cam driver 21 is lowered to advance it again. When the cam slide 10 stops moving backward, the shock absorbing member 13
Since it is performed by abutting on the rear wall portion 4, the impact at the time of stopping is relaxed.

[0017]

The press cam die of the present invention has a circular cross section.
A cam guide that has a guide bar, a cam slide that is guided by the cam guide, and one end that is interposed between the cam guide and the cam slide to urge the cam slide. Comes into contact with the cam guide
A coil spring and a cam driver that drives the cam slide by coming into contact with the cam slide , and the cam slide is slidably supported by the guide bar via bearings. It is easy to assemble and has excellent workability . Furthermore, one end of the coil spring contacts the cam guide.
A disk shape surrounded by one end of the coil spring to hold the position
Position of the spring fixed to the cam guide
A spring position that is equipped with a holding member and is surrounded by one end of the coil spring.
The surface of the conical portion of the holding member aligns one end of the coil spring.
Coil spring during use due to the alignment surface
One end of the
Even if one end rides on the disc-shaped part, it will become the surface of the conical part.
As a result of returning to the original position, one end of the coil spring is a disk
The coil will always be held in the position that surrounds the coil.
One end of the spring is out of the normal position and the cam slide
The coil spring will be crushed and normal operation will not be possible.
You can avoid such situations.

[Brief description of drawings]

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

FIG. 2 is a front view of the specific example shown in FIG.

3 is a partially enlarged explanatory view of the specific example shown in FIG. 1. FIG.

[Explanation of symbols]

1 Cam guide 10 cam slide 15 Cam surface 21 cam driver 25 Cam surface 28 coil spring

─────────────────────────────────────────────────── ─── Continuation of the front page (56) Bibliography Flat 2-138023 (JP, U) Real development Sho 55-4820 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) B21D 28/34 B21D 5/01 B21D 37/08

Claims (3)

(57) [Claims] 1. A cam guide having a guide bar having a circular cross section, a cam slide to be guided by the cam guide, and a cam interposed between the cam guide and the cam slide. to urge the slide
A coil spring whose one end abuts on the cam guide, and a cam driver which abuts on the cam slide to drive the cam slide ,
Be sure to maintain the contact position of one end of the coil spring with the cam guide.
And has a disk-shaped part surrounded by one end of the coil spring.
And comprising a spring position holding member fixed to the cam guide along with the cam slide is slidably supported via a bearing gas Idoba, disk-shaped spring position holding member
The part has a conical part integrally formed on its end surface,
The surface of the conical part should be an alignment surface that aligns one end of the coil spring.
A cam type for press, which is characterized by being formed . 2. The bearing comprises a pair of bush bearings,
The pair of bush bearings slidably contact the guide bar on the inner surface and are fixed to the cam slide on the outer surface in the through hole of the cam slide through which the guide bar penetrates.
Cam type for press described in. 3. The coil spring extends parallel to the guide bar.
The press cam mold according to claim 1 or 2, which is arranged .