JPH11319992A - Cam unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively and easily enable, for example, a cam unit in a press die to bend a edge part of an automobile body frame to correspond to a large cam unit. SOLUTION: The cam unit 1 consists of a cam driver, which is fixed to one side of a die and drives the cam, and a cam slider, which is driven for reciprocating linear motion by the cam driver and is slidably arranged on the other side of the die. In this case, as the plural cam sliders 2 are arranged side by side, through holes 2c, which connects the sliders with a shaft, are arranged on the cam sliders 2 in a direction orthogonal to its side by side direction.

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 cam unit of a press mold for bending an edge of a body frame for an automobile.

[0002]

2. Description of the Related Art Conventionally, when a large metal plate such as an automobile body is molded with a lower fixed mold and an upper movable mold in a vertical direction, holes are formed in the side surfaces of the molded product. To drill or bend the edges, see FIG.
As shown in the figure, the cam unit 1a is attached to a mold. For example, the cam driver 21 of the movable mold 20 is provided with a tapered surface 21a, and the cam slider 22 having a tapered surface 22a abutting on the tapered surface 21a and sliding on the base 24 of the fixed mold in a predetermined range in the left-right direction. And a tool 23 (for example, for drilling) is fixed to the side surface of the cam slider 22.

The cam slider 22 slides on the base 24 in the left-right direction by the vertical reciprocating movement of the movable mold 20, and the side surface of the molded product 25 is machined by the tool 23.

When the cam driver 21 is moved upward together with the movable mold 20, the cam slider 22
It is returned to the original position by the urging force of the elastic body 26 such as a spring constantly urging to the left. However, depending on only the biasing force of the elastic body 26, the molded product 25
In order to separate the tool 23 from the molded product 25 from the molded product 25, it is impossible to remove the tool 23 or the like from the molded product 25 because force is insufficient.

[0005] Therefore, as shown in FIGS.
Is fixed with a bolt or the like, and an engaging groove 22b for engaging with an engaging claw formed at the tip of the follower 21b is provided on the side wall of the cam slider 22 in parallel with the tapered surface 22a, and these force return. Follower 21b and engagement groove 22b
Are provided as forcible return means. Then, cam units of various widths are prepared corresponding to various sizes of the molded product.

[0006]

In molding a molded article with the above-mentioned mold, the size of the molded article usually varies in size, so that a dedicated cam unit must be provided for each molded article. . Therefore, the cost increases due to the provision of a dedicated mold, the burden of setting up the mold replacement etc. increases, and
There is a problem to be solved that increases the burden of managing parts of the mold. The cam unit according to the present invention is proposed to solve such a problem.

[0007]

The gist of the cam unit according to the present invention is as follows. The cam unit is fixed to one of the molds to drive a cam, and the cam driver is caused to reciprocate linearly by the cam driver. A cam unit comprising a cam slider slidably provided on the other side of the mold, wherein the cam slider is provided with connecting means for arranging a plurality of the cam sliders in parallel and integrally connecting them. That is.

[0008] The connecting means includes at least a through hole provided in a direction orthogonal to the direction in which the cam sliders are arranged in parallel, and through which a shaft is inserted.

The gist of the cam unit according to the present invention is that a cam driver fixed to one side of a mold and driven by a cam, a cam slider reciprocated linearly by the cam driver and slidably provided on the other side of the mold. Wherein the cam slider is provided with through holes for arranging a plurality of the cam sliders in parallel and connecting them with a shaft in a direction perpendicular to the direction in which the cam sliders are arranged. Said cam sliders,
A shaft of a required length, which is inserted through the through-hole of the cam slider and has threaded portions at both ends in the longitudinal direction,
A plurality of cam sliders are integrally connected from a collar that is interposed on the shaft between the side-by-side cam sliders and maintains a gap, and a lid member that is screwed to threaded portions at both ends of the shaft. That is being done.

[0010] According to the cam unit of the present invention, since at least a through hole is provided as a connection means for connection in a single cam unit, the metal unit can flexibly cope with a change in the size of a molded product. This makes it possible to set up the mold, thereby reducing the manufacturing cost of the mold and facilitating parts management by reducing the number of mold parts.

[0011]

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

The cam unit 1 according to the present invention is a unit which can be independently replaced with a mold. As shown in FIG. 1, for example, in the vertical direction, a lower fixed mold 24 and an upper movable mold 24 are movable. It is provided in a mold (see FIG. 6) in which a molded product is molded by the mold 20. The cam unit 1 includes a cam driver 21 that operates a cam and a cam slider 2 that operates a cam. The cam driver 21 is fixed to one movable mold 20 of the mold.

The cam slider 2 is reciprocated linearly in the left-right direction orthogonal to the cam slider 21 by the reciprocating movement of the cam driver 21 in the up-down direction.
The other fixed mold 24 of the mold is slidably provided.

The cam driver 21 is the same as that of the conventional example, has a tapered surface 21a as a cam action surface, and has a forced return follower 21b.

On the other hand, the cam slider 2 has a tapered surface 2a that comes into contact with the tapered surface 21a in parallel, and has an engaging groove 2b that engages with an engaging claw of the forced return follower 21b.

Below the cam slider 2, a slide base plate 3 is fixed to a stationary mold 24,
A guide pin angle 4 is suspended from the left end of the base plate 3, and a guide pin block 5 is suspended from the right end.

Between the guide pin angle 4 and the guide pin block 5, a cylindrical spring guide pin 6 is horizontally provided by a pin penetrating the center and a hexagon nut.

Further, from the lower part of the cam slider 2,
A spring guide 7 is vertically provided so as to straddle the spring guide pin 6. And the spring guide 7
Between the spring guide pin 6 and the guide pin block 6
, And a spring for a compression spring, for example, is provided as the elastic body 26.

The cam slider 2, which is forcibly moved rightward by the lowering of the cam driver 21 by the elastic body 26, is moved by the cam driver 21.
Is moved upward, the leftward movement is released, the elastic body 26 is moved leftward by the urging force of the elastic body 26, and returned to the original position.

FIG. 1 shows the cam slider 2.
As shown in FIG. 5, a through hole 2c is provided to penetrate in the front-rear direction (the direction perpendicular to the paper surface). In addition, counterbore portions 2d are provided in the openings at both ends of the through hole 2c. The through holes 2c are connecting means for connecting the plurality of cam sliders 2 in parallel with each other.

The cam slider 2 is provided with a through hole 2c as a connecting means in a direction perpendicular to the direction in which the cam sliders are juxtaposed, as shown in FIG.
In order to connect a plurality of cam sliders 2 side by side and to integrally connect them, first, a plurality of cam sliders 2 are arranged in parallel, for example, three cam sliders 2 are placed in parallel with each other, and the cam sliders 2 are placed in alignment with each other. .

The respective through holes 2c, 2c, 2c
Then, the rod-shaped shaft 8 having a required length is inserted through each.
At that time, the cam slider 2 and the cam slider 2
And a collar 10 for maintaining the gap constant.

Then, a washer is fitted to the counterbore 2d on the threaded portion formed at both ends of the shaft 8, and caps 9, 9 as cover members are screwed and fixed. The cam sliders 2, 2, ... are integrally connected and fixed.

As described above, a method for forming a large-sized cam unit in which a plurality of single cam sliders 2 are formed side by side and connected by connecting means such as the through hole 2c, the shaft 8, the collar 10, and the like. Thus, a connected / integrated cam unit is formed. Therefore, at the time of its use, the cam sliders 2, 2,.
The corresponding cam drivers 21, 21,... Are handled as one cam unit product, and are fixed to a fixed mold and a movable mold, respectively.

Then, the connected cam sliders 2,
A cutting tool for drilling or a curved blade for bending is attached to 2,. For example, it is possible to easily cope with a molded product 25 having a width larger than that of a molded product that can be handled by a cam unit using a single cam slider 2.

In addition, it is not necessary to form a single cam unit for a large molded product exclusively, and the manufacturing cost of the mold can be reduced. Further, in the die management, only the small and single cam unit 1 may be managed, so that the required space is narrowed and the storage space is effectively used.

Further, in order to correspond to a molded product such as a larger body, it is sufficient to prepare a required number of longer shafts 8. The storage space for the shafts having different lengths is in a bar shape and not bulky, so that it is sufficient to secure a narrow space.

As another embodiment of the present invention, the shape of the shaft 8 is a polygonal cross-section, and the cross-sectional shape of the through-holes 2c of the cam sliders 2 arranged and connected in parallel is polygonal. It is to be shaped.

By doing so, each cam slider 2 connected by the shaft 8 having a polygonal cross section is prevented from rotating around the axis of the shaft 8.

Further, as another embodiment of the present invention, the connecting means provided on the cam slider includes not only the through-hole 2c through which the shaft 8 is inserted, but also the head or the head of a plurality of parallel cam sliders. A fixing means for fixing a reinforcing member such as a reinforcing bar (for example, a steel bar or a plate) transversely arranged over the front surface (the surface on the tool mounting side) can also be provided.

Therefore, by inserting the shaft 8 into the through hole 2c, the positioning of the plurality of cam sliders simultaneously cammed is maintained with high precision, and the reinforcing member fixed by the fixing means integrally forms the cam slider. The structural strength of the cam unit which is connected to each other becomes stronger.

According to the cam unit according to the present invention, for example, when the width of the single cam unit 2 is about 150 mm, the cam unit 2 is connected via the collar 10 to obtain a total of 600
mm in width.

[0033]

As described above, the cam unit according to the present invention comprises a cam driver fixed to one side of a mold and driven by a cam, and a reciprocating linear motion caused by the cam driver to slide freely on the other side of the mold. A cam unit comprising: a cam slider provided with a plurality of cam sliders. Because the through holes are provided, the cam slider in the cam unit can be integrally connected by a shaft or the like, so that a large cam unit corresponding to a large-width molded product can be easily formed. It has the effect that it has.
In addition, there is an excellent effect that the manufacturing cost of the cam unit is reduced and the die management becomes easy.

The connecting / integral cam unit according to the present invention is fixed to one side of a mold and driven by a cam, and is reciprocally linearly moved by the cam driver and slidably provided on the other side of the mold. A cam unit comprising a cam slider, wherein the cam slider includes:
A plurality of cam sliders are arranged side by side, and a through hole is provided for connecting with a shaft in a direction perpendicular to the direction in which the cam sliders are arranged.The plurality of cam sliders arranged side by side and the through holes of the cam sliders are provided. A shaft having a required length with a threaded portion engraved at both ends in the longitudinal direction, a collar interposed between the shafts between the side-by-side cam sliders to maintain a gap, and both ends of the shaft Since a plurality of cam sliders are integrally connected to the lid member screwed to the screw portion of the portion, an excellent effect that a large-sized cam unit can be formed at low cost is achieved. Things.

[Brief description of the drawings]

FIG. 1 is a front view showing a use state of a cam unit according to the present invention.

FIG. 2 is a plan view of a cam slider in the cam unit according to the present invention.

FIG. 3 is a side view of a cam slider in the cam unit according to the present invention.

FIG. 4 is a partially enlarged view of a cam driver in the cam unit according to the present invention.

FIG. 5 is a plan view showing a state in which the cam slider in the cam unit according to the present invention is integrally connected by connecting means.

FIG. 6 is a front view schematically showing an entire mold including a cam unit 1a according to a conventional example.

FIG. 7 is a front view of a cam unit 1a according to the conventional example.

FIG. 8 is a sectional view taken along the line BB in FIG. 7;

9 is a cross-sectional view (a) along the line AA in FIG. 7, and a plan view (b) of the cam driver in FIG.
It is.

[Explanation of symbols]

1, 1a cam unit, 2 cam slider, 2a
Tapered surface, 2b engagement groove, 2c through hole, 2d counter bore, 3 base plate, 4 guide pin angle, 5
Guide pin block, 6 spring guide pin, 7 spring guide, 8 shaft, 9 cap, 10 collar, 21 cam driver, 21b forced return follower, 25 molded product, 26 elastic body. ,

Claims (3)

[Claims] 1. A cam unit comprising: a cam driver fixed to one side of a mold to drive a cam; and a cam slider slidably reciprocated by the cam driver and slidably provided on the other side of the mold. A cam unit provided with connecting means for arranging a plurality of cam sliders in parallel and connecting them integrally. 2. The connecting means is provided at least in a direction perpendicular to a direction in which the cam sliders are arranged in parallel.
The cam unit according to claim 1, wherein the cam unit is a through hole through which a shaft is inserted. 3. A cam unit comprising: a cam driver fixed to one side of a mold and driven by a cam; and a cam slider slidably reciprocated by the cam driver and slidably provided on the other side of the mold. The cam slider has a plurality of cam sliders arranged side by side, and a through-hole for connecting a plurality of the cam sliders with a shaft in a direction perpendicular to the parallel direction is provided. A shaft of a required length, which is inserted through the through hole of the cam slider and has thread portions engraved at both ends in the longitudinal direction, and a collar which is interposed between the shafts between the side by side cam sliders and maintains a gap. A lid member screwed to the threaded portion at both ends of the shaft,
A plurality of cam sliders are integrally connected to each other.