JP2015180515A - Overhanging cam device sharing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve problems that the number of components increases, the number of management man-hours increases, a production cost increases, and the number of man-hours for torque management of an attachment part increases if an elastic member for returning a cam slider is a gas spring or a coil spring and the cam slider is configured to be able to share the gas spring and the coil spring.SOLUTION: A sharing method of an overhanging cam device comprises: a cam holder; a cam slider slidably held in the cam holder, including a concave portion containing therein an elastic member, returned from a workpiece machining position to an original position by the elastic member, and sliding along a cam surface; and a cam driver including a sliding cam surface slidably contacting the cam surface of the cam slider, the concave portion having a depth enough to contain the elastic member smallest in overall length among a plurality of elastic members having different overall lengths, and a depth of part of or all of a bottom of the concave portion is increased in a case of using the elastic member larger in overall length than the elastic member having the smallest overall length, thereby making the device compatible to changes in the specifications of the elastic members.

Description

The present invention relates to a method for sharing a suspension cam device that performs a hole, a bending process, or the like on a workpiece such as an automotive metal panel.

Conventionally, as shown in FIG. 7, the suspension type cam device 1 a is a base portion that is fixed to a movable mold (not shown) of a mold and is in an upper position to hold the cam slider 13 slidably. The cam holder 10, the cam slider 13 held by the cam holder 10 and holding the tool on the tool mounting surface, and the cam slider 13 are in sliding contact with the inclined cam surface and fixed to a fixed mold (not shown) of the mold. And a cam driver 17 placed at the lower position . The cam slider 13, drilled, bent by the tool on the workpiece while the movable die at the bottom dead center position or from the top dead center position moves, when returning to the top dead center position, the biasing force of the elastic member for returning the cam slider 13 is returned to the original position by the.

Elastic force to return the mosquito Musuraida 13 to its original position, the gas spring 11 or coil spring 12 is used. FIG. 5 shows a gas spring type cam slider, and FIG. 6 shows a coil spring type cam slider. Such a cam device 1a is known as described in Patent Document 1.

JP 2008-227771 A

In the conventional suspension cam type cam device, as shown in FIGS. 5 and 6 , the gas spring 11 and the coil spring 12 are shared, and the cam slider 13 is shared. Therefore , the gas spring 11 or the coil spring 12 is used as shown in FIGS. 8 to 9 by using spring stopper plates 15a and 15b for the mounting hole 14 provided in the cam slider 13, a spring guide member (not shown) or the like. In addition, the position is fixed (stored) in the through-hole 16 for the elastic member that is penetrated.

However , in order to use the gas spring 11 and the coil spring 12 in common, the spring guide member or the spring stopper plates 15a and 15b are required. Therefore , there are many types of spring stopper plates, and the number of parts increases. It takes time to manage the inventory.

Further, a spring strike Tsu Per plate, so screwed is fixed to the cam slider 13, there is a risk that the screw loosening with vibration, take the torque management steps of the screw. Further , since the spring stopper plate is screwed, the width of the cam slider 13 is increased to secure a plurality of screw holes, and the entire cam device 1a is enlarged. The sharing method of the cam device of the present invention has been proposed in order to solve such a problem.

The present invention has a cam holder fixed to a moving mold of the mold, a slidably held by the cam holder, and a recess for accommodating an elastic member, and the elastic member returns the workpiece processing position to the original position. The cam has a cam slider that slides along the cam surface and holds the tool on a tool mounting surface on one side in the sliding direction, and a sliding cam surface that is in sliding contact with the cam surface of the cam slider. A suspension cam device having a cam driver fixed to a mold, wherein the recess has a depth to accommodate the shortest elastic member among a plurality of elastic member groups having different overall lengths. However, when using an elastic member having a longer overall length than the elastic member having the shortest overall length, processing is performed to increase the depth of part or all of the bottom of the recess, and the suspension cam device having the same outer shape is used to Finishing Characterized in that to accommodate changes.

According to the sharing method of the suspension cam device of the present invention, the spring stopper plate used in the conventional example is not required, screwing is eliminated, and screw torque management is also unnecessary. Furthermore, since the number of parts is reduced, inventory management is facilitated and the cost of the suspension cam device can be reduced. In addition , since the stopper plate is eliminated, there is no need for the fixing screw hole, the cam slider is miniaturized, and the entire suspension cam device is thereby miniaturized. .

It is the side view (A) and top view (B) of the suspension cam apparatus of a present Example . Definitive hanging cam device of this embodiment is shown in FIG. 1 when using the gas spring as the elastic member A-A line cross-sectional view and (A), the sectional view taken along line B-B and (B). Definitive hanging cam device of this embodiment is shown in FIG. 1 when using the coil spring as the elastic member A-A line cross-sectional view and (A), the sectional view taken along line B-B and (B). Definitive hanging cam device of the present embodiment, cross-sectional view according to another embodiment of the storage recess of the elastic member (A), a (B). Definitive hanging cam device of the reference example, cross-sectional view according to another embodiment in which the protrusion provided in the housing recess of the elastic member (A), a (B). Definitive hanging cam device of the reference example, cross-sectional view according to another embodiment in which the annular projection is provided in the housing recess of the elastic member (A), a (B), (C), (D). Elastic member suspending the cam device of the conventional example is an exploded perspective view of the gas spring. Elastic member suspension cam unit of the slave come example is an exploded perspective view of the coil spring. Elastic member suspension cam unit of the slave come example is an exploded perspective view of the gas spring. Definitive hanging cam device of the slave come example is shown in FIG. 7 in the case of using a gas spring as an elastic member A-A line cross-sectional view and (A), the sectional view taken along line B-B and (B). FIG. 8 is a cross-sectional view taken along line AA in FIG. 7 and a cross-sectional view taken along line BB in FIG. 7 when a coil spring is used as an elastic member in the conventional suspension cam device.

As shown in FIGS. 1 to 3, the cam device 1 according to the embodiment of the present invention includes a gas spring 2 or an elastic member that returns a cam slider 4 used for a desired processing force from a processing position to an original position. The coil spring 3 can be shared by one kind of cam slider 4. Examples will be described below, and the same members as those of the conventional example will be described with the same reference numerals as those of the conventional example.

As shown in FIGS. 1 to 3, the suspension cam device 1 of the first embodiment of the present invention is a cam holder 10 that is fixed to a movable mold 5 of a mold and is a base portion that slidably holds a cam slider 4. And is slidably held by the cam holder 10 and is returned to the original position from the workpiece processing position by the elastic members (2, 3), and slides along the cam surfaces 4a and 4b, and on one side in the sliding direction. The tool mounting surface 4c has a cam slider 4 that holds a tool (for example, a drilling tool, a bending tool, not shown), and a sliding cam surface that is in sliding contact with the cam surface 4b of the cam slider 4. It consists of a cam driver 17 fixed to a fixed mold 6 of the mold.

Recess 4d for accommodating the elastic member cams slider 4, the diameter of the recess 4d and also by the depth (depth from the opening end face, L1, L2) of the recess by changing by processing, The gas spring 2 and the coil spring 3 are used together.

The depth of the recess 4d of cams slider 4 (also referred to as the length from the opening end face) dimension L is initially to form a recess 4d in the L1 shallow dimensions. The cam slider 4 having the recess 4d having a depth of L1 is managed for the gas spring 2. When the coil spring 3 having the same diameter as that of the gas spring 2 is required, the depth of the recess 4d is deeply processed to L2 by the required number. In this way, the single cam slider 4 can be used for both the gas spring and the coil spring.

In the suspension cam device 1 of the second embodiment of the present invention, as shown in FIG. 4-A (A), the length from the opening end surface is the same as the diameter d1 of the recess 4d having a depth L1. The long (L2) is processed to use a long type of gas spring or coil spring. Further, by adding and processing a recess which is smaller than the diameter d1 diameter, the diameter of the coil spring or gas spring is smaller than the diameter d1 of the basic form, what length from the opening end face of the long type (L2) Can be used.

In the suspension cam device 1 of the third embodiment of the present invention, as shown in FIG. 4A (B), the diameter d1 of the basic shape in the recess 4d is increased to the diameter d2, or the diameter of the recess is increased to the diameter d2. Further, the length L from the opening end face can be changed. Accordingly, a gas spring or a coil spring having a large diameter d2 and a different length L from the opening end face can be used in combination.

Reference example 1

In the suspension cam device 1 of the reference example 1 , as shown in FIG. 4-B (A) and FIG. 4-B (B), a protrusion 4e protruding upward from the bottom surface is provided at the bottom of the recess 4d. Adjust the height appropriately. Accordingly, the gas spring 2 of the type (L1) having a short length L from the opening end surface and the coil spring 3 of the type (L2) having a long length from the opening end surface are made the same in the diameter d1 of the recess 4d. Can be used together.

Reference example 2

In the suspension cam device 1 of Reference Example 2, the bottom of the recess 4d is formed into a circular protrusion 4f by machining a cylindrical hole in the protrusion 4e in Reference Example 1 , as shown in FIG. Then, the annular protrusion 4f is set to the height of the protrusion that makes the gas spring 2 usable length L.

Therefore, as shown in FIG. 4-C (B), the coil spring 3 having a length L2 from the opening end surface can be inserted between the annular protrusion 4f and the peripheral wall surface of the recess 4d. FIG 4-C as shown in (C), plug the gas spring 2b of long type inside the recess dimensions of the annular projection 4f (L2) can be used, further, as shown in FIG. 4-C (D) In addition, the coil spring 3a having a small diameter can be used by being inserted into the inner concave portion of the annular protrusion 4f.

Furthermore, it is possible by combining the use state of FIG. 4-C (B), and a use state of FIG. 4-C (C), using a coil spring 3 and the gas spring 2b simultaneously. Similarly, it is possible by combining the use state of FIG. 4-C (B), and a use state of FIG. 4-C (D), using a coil spring 3,3b simultaneously.

  In this way, by forming one cam slider 4 having a concave portion 4d for a basic elastic member, it can be processed and used for a plurality of types of cam sliders. This eliminates the need for stoppers and set screws.

The suspension cam device of the present embodiment has a gas spring / coil spring combined structure that can be widely applied to the return elastic member of the cam device.

1 suspension cam device, 1a cam device,
2 Gas spring,
2a, 2b gas spring,
3, 3a coil spring,
4 Cam slider,
4a, 4b Cam surface, 4c Tool mounting surface,
4d recess, 4e protrusion,
4f annular projection,
5 Moving mold,
6 Fixed mold,
10 Cam holder,
11 Gas spring,
12 coil spring,
13 Cam slider,
14 mounting holes,
15a, 15b Spring stopper plate,
16 through hole for elastic member,
17 Cam driver.

Claims (2)

A cam holder fixed to the moving mold of the mold,
The cam holder is slidably held by the cam holder, and has a concave portion for accommodating an elastic member. The elastic member returns the workpiece processing position to the original position and slides along the cam surface and one side in the sliding direction. A cam slider that holds the tool on the tool mounting surface of
A method of sharing a suspension cam device having a sliding cam surface that is in sliding contact with the cam surface of the cam slider, and a cam driver fixed to a fixed mold of the mold,
The recess has a depth for accommodating the elastic member having the shortest overall length among the plurality of elastic members having different overall lengths,
When using an elastic member having a longer overall length than the elastic member having the shortest overall length, performing a process of increasing the depth of a part or all of the bottom of the recess,
Responding to specification changes of the elastic member with the suspension cam device of the same outer shape;
A method for sharing a suspension cam device. The recess has an inner diameter that houses an elastic member having the smallest outer diameter among the plurality of elastic members having different outer diameters,
When using an elastic member having a larger outer diameter than the elastic member having the smallest outer diameter, performing processing to increase the inner diameter of the recess,
Responding to specification changes of the elastic member with the suspension cam device of the same outer shape;
The sharing method of the suspension cam apparatus according to claim 1.

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