JP2000135526A - Cam unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To work out an abrasion countermeasure for a cam unit and, to devise a weight reduction thereof with reference to a cam slider of a cam unit such as a horizontal cam unit, a hanging cam unit, a tilting cam unit and the like in a press die for bending a vehicle body frame end edge part. SOLUTION: This cam unit 1 comprises, a cam driver 10 mounted on a fixed die and a movable die for processing a mold, and fastened to the movable die, a cam slider 2 which slides with the cam driver 10, and a cam base 3 fastened to the fixed die for supporting the cam slider 2 freely slidably, wherein automatic aligning methods 2a, 2b, 3d, 3e are installed on a sliding face between the cam slider 2 and the cam base 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cam unit of a mold, and more particularly to a horizontal cam unit in a press mold for bending an edge portion of an automobile body frame.
The present invention relates to a cam unit such as an inclined cam unit.

[0002]

2. Description of the Related Art Conventionally, a cam unit provided between a fixed mold and a movable mold is fixed to an upper movable mold, for example, like a horizontal cam unit shown in FIG. A cam driver 10, a cam slider 11 having a slide surface that comes into contact with the cam surface of the cam driver 10, and sliding in a predetermined amount in the left-right direction, and supporting the cam slider 11 to be fixed to a lower fixed mold. Cam base 12
, And is generally configured from.

Under the cam slider 11, a spring pin 11a is provided on a protrusion protruding into the cam base 2.
The spring pin 11a and the cam base 12 are screwed.
The return spring 13 is fitted in the concave portion.

[0004] By the vertical movement of the cam driver 10,
The cam slider 11 having a tool attached to the tip side reciprocates in the left-right direction for processing. In addition, cam driver 10
Is moved upward, the cam slider 11 is returned to the left by the return spring 13.

[0005]

In the above-mentioned conventional cam unit, as shown in FIG. 4 (b), a lower portion 11a of the cam slider 11 is provided with an upright portion rising from both ends of the cam base 12. 12a, and the step portion 11b
Is held down by a holding bracket 14 bolted to the upright portion 12a. These constitute a guide for sliding the cam slider 11.

Accordingly, the width b of the cam base 12 is much larger than the width a of the cam slider 11,
The weight of the entire cam unit increases. Further, the sliding contact surface between the lower portion 11a and the cam base 12 is a horizontal surface, and depending on the degree of wear, there is a risk that the sliding surface may not be able to flexibly absorb axial deflection due to the pressing force of the cam surface. . Further, there is a problem that the cam slider 11 and the cam base 12 must be further increased in order to apply a large pressing force. The cam unit according to the present invention is proposed to solve such a problem.

[0007]

The gist of the present invention for solving the above-mentioned problems in the cam unit of the present invention is that the cam unit is mounted on a fixed mold and a movable mold and is used for processing a molded product. A cam unit comprising: a fixed cam driver; a cam slider slid by the cam driver; and a cam base fixed to the fixed mold to slidably support the cam slider. The self-aligning means is provided on the sliding surface between the cam base and the cam base.

The self-aligning means includes a guide member having a tapered portion that raises a central portion of the cam base in a direction perpendicular to the sliding direction of the cam slider, and a guide member that is opposed to the guide member, and a tapered portion of the guide member. And that the cam slider and the cam base have the same or substantially the same width in the direction perpendicular to the sliding direction.

According to the cam unit of the present invention, there is provided a cam unit having a slide mechanism of an automatic centering structure. Stable workability is maintained. Further, the width of the cam slider can be set to be the same as the width of the cam base, and the area of the tool mounting surface of the cam slider can be increased.
Furthermore, as in the conventional cam unit, the cam slider is sandwiched from both sides and slide-held, so that the width of the cam base becomes large and heavy, but in the cam unit of the present invention, the width between the cam slider and the cam base is increased. Are made the same or substantially the same, so that the overall size is reduced and the weight is significantly reduced.

[0010]

Next, a cam unit according to the present invention will be described with reference to the drawings. Note that, for easy understanding of the present invention, portions corresponding to the conventional example are denoted by the same reference numerals as the conventional example.

As shown in FIG. 1, a cam unit 1 according to the present invention includes a cam driver 10 fixed to an upper movable mold with bolts and the like, and a cam surface 10 of the cam driver 10.
The cam slider 2 is generally constituted by a cam slider 2 which is slid in the left-right direction by the cam action a, and a cam base 3 which slidably supports the cam slider 2.

The lower portion 2c of the cam slider 2 is formed in a mountain shape with tapered surfaces 2a and 2b which are raised from both side ends toward the center in a direction perpendicular to the left-right sliding direction.

The cam slider 2 has the cam surface 1
There is a cam surface 2d slidably contacting the cam slider 0a, and a forced return follower 4 for engaging the inclined portion 10b and returning the cam slider 2 to the original position when the cam driver 10 moves upward is fixed to the side wall surface by bolts. ing.

The cam base 3 has two guide blocks 3a and 3b opposed to each other at an appropriate interval along the sliding direction on a base body 3c fixed to a lower fixed die with bolts or the like. Secured with bolts 5 (see Fig. 3)
Guide member. Further, at both left and right end surfaces of the guide blocks 3a and 3b, the reinforcing plate 6
It is reinforced by being attached with. Reference numeral 8 denotes a spring pin for attaching a return spring.

The upper surfaces of the guide blocks 3a and 3b are
Tapered surfaces 2a, 2b of lower portion 2c of cam slider 2
Are provided with tapered surfaces 3d and 3e having angles corresponding to. These tapered surfaces 2a, 2b and tapered surfaces 3d, 3e
Thus, an automatic alignment means is configured. By arranging the guide blocks 3a and 3b to face each other at appropriate intervals, a guide block having a small shape with respect to the tapered surfaces 2a and 2b can be obtained, thereby saving material and reducing weight. is there.

As shown in FIG. 3, the cam slider 2 extends in a direction orthogonal to the sliding direction of the cam slider 2.
And the width of the cam base 3 are set to be the same. The same width means that the widths are the same or substantially the same.
It means that there is an error of 0 mm or less, and it means that whether or not the dimensions are exactly the same is not considered.

As described above, the cam unit 1 of the present invention is constructed, and if this is mounted on a mold and used, the tool mounting surface 2e is reciprocated up and down by the cam driver 10.
The slide of the cam slider 2 having a tool mounted on the tapered surfaces 2a and 2b and the tapered surfaces 3
Even if d and 3e are worn, the cam slider 2 does not deviate in center due to the self-aligning structure.

Further, since the sliding contact area by the tapered surface is increased as compared with the conventional sliding contact area which is a horizontal plane, it can withstand a larger processing pressure. Further, the area of the tool mounting surface 2 can be increased in accordance with the width of the cam base 3 so that various tools can be mounted.

[0019]

As described above, the cam unit according to the present invention is mounted on a fixed mold and a movable mold, is used for processing a molded product, and includes a cam driver fixed to the movable mold. A cam slider comprising a cam slider slid by the cam driver and a cam base fixed to the fixed mold so as to slidably support the cam slider, wherein the cam slider is in sliding contact with the cam base. Since the self-aligning means is provided on the surface, an excellent effect is obtained in that the cam unit is excellent in abrasion measures and does not cause center displacement.

The self-aligning means includes a guide member having a tapered portion having a center portion raised in a direction perpendicular to the sliding direction of the cam slider in the cam base, and arranged opposite to each other, and corresponds to the tapered portion of the guide member. Since it is composed of the lower portion of the cam slider having the sliding contact surface, it has an excellent effect that it has a simple structure, has a large sliding contact area, and can cope with a large processing pressure.

Further, by setting the width of the cam slider and the cam base in the direction orthogonal to the sliding direction to be the same or substantially the same, it is possible to increase the area of the tool mounting surface of the cam slider to mount various tools. Becomes possible,
The overall weight of the cam unit is also reduced to about one-third the weight of the conventional cam unit, which provides an excellent effect that it can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cam unit according to the present invention.

FIG. 2 is a rear perspective view of the cam unit according to the present invention.

FIG. 3 is a side view of the cam unit according to the present invention, excluding a cam driver.

FIG. 4 is a front view (a) and a side view (b) of a cam unit according to a conventional example.

[Explanation of symbols]

1 cam unit, 2 cam slider, 2a, 2b
Tapered surface, lower part of 2c cam slider, 2d cam surface, 2e tool mounting surface, 3 cam base, 3a, 3b
Guide block, 3c base body, 6 reinforcing plate, 10
Cam driver, 10a cam surface.

Continued on the front page (72) Inventor Shoji Nemoto 1-1-5 Nisshinmachi, Fuchu-shi, Tokyo Inside Sankyo Oilless Industry Co., Ltd. (72) Inventor Masahiro Shibata 1-1-5 Nisshinmachi, Fuchu-shi, Tokyo Sankyo Oil lures industry F term (reference) 4E050 DA03 DA10 4E063 AA20 DA06 DA20 MA18

Claims (3)

[Claims] 1. A cam driver which is mounted on a fixed mold and a movable mold, is used for processing a molded product, and is fixed to the movable mold, a cam slider slid by the cam driver, and the cam A cam unit comprising a cam base fixed to the fixed mold so as to slidably support the slider, wherein a self-aligning means is provided on a sliding contact surface between the cam slider and the cam base. Cam unit. 2. A self-aligning means comprising: a guide member having a tapered portion having a center portion raised in a direction perpendicular to a sliding direction of a cam slider in a cam base, the guide member being opposed to the guide member; The cam unit according to claim 1, comprising a cam slider lower part having a corresponding sliding contact surface. 3. The cam unit according to claim 1, wherein the width of the cam slider and the cam base in the direction perpendicular to the sliding direction is the same or substantially the same.