JP6311083B1 - Cam device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cam device that facilitates assembly work. SOLUTION: Either a first die or a second die is driven in a pressing direction and attached to a die for pressing a workpiece, a cam holder attached to the first die, and the workpiece is processed. A cam slider that is slidably attached to the cam holder in a predetermined reciprocating direction, and a cam driver that is attached to the second mold and drives the cam slider in the machining direction. The cam holder includes a aligning hole having a predetermined inner diameter, a washer inserted into the aligning hole, an outer diameter smaller than the inner diameter of the aligning hole, and a washer having a pin hole at the center. The cam slider is extended and retracted in the reciprocating direction with the mounting portion, one end is in contact with the mounting portion, the other end is in contact with the washer, the coil spring is inserted into the coil spring, and one end is in front The other end has a guide pin inserted into the pin hole of the washer. [Selection] Figure 1

Description

  The present invention relates to a cam device that facilitates disassembly / assembly work.

  A large metal plate such as an automobile body is press-molded by a lower fixed mold and an upper movable mold. At the same time as the press molding, a cam device that can be installed in a mold is used to make a hole in the side surface of the press-molded product or to bend the edge.

  For example, the cam device can be installed with a cam holder attached to the upper die, a machining tool for machining the workpiece, a cam slider slidably attached to the cam holder, and attached to the lower die to drive the cam slider in the machining direction. Having a cam driver.

  The cam device has a coil spring that biases the cam slider in a direction opposite to the machining direction. As shown in FIG. 5, the guide B of the coil spring A of the conventional cam device is a partial guide.

  In the conventional guide structure, the spring A, the guide hole C, and the guide pin B are each wrapped as shown in FIG. For this reason, when disassembling the cam slider Y, parts are caught and workability is poor. Further, as shown in FIG. 6, when disassembling the cam device, it is necessary to pull back the cam slider Y by a length of l2 until it is detached from the cam holder X.

  Patent Document 1 includes a washer 4 that abuts one end of a coil spring 3, a spring guide shaft 2 that passes through the coil spring 3, one end is fixed to the holder 9, and the other end is inserted into the washer 4. A cam unit comprising a holder 9 and a slider 10 having a plate 5 having an opening into which the washer 4 is inserted is disclosed.

Japanese Utility Model Publication No. 6-23626

  However, the cam unit of Patent Document 1 does not include a spring guide mechanism provided in the cam holder and a spring guide mechanism provided in the cam slide.

  The present invention has been made to solve such a conventional problem, and it is an object of the present invention to provide a cam device capable of facilitating disassembly / assembly work.

  According to the present invention, either a first mold or a second mold is attached to a mold for pressing a workpiece by driving in the pressing direction, a cam holder attached to the first mold, and a workpiece is processed. A cam slider that is slidably attached to the cam holder in a predetermined reciprocating direction, and a cam driver that is attached to the second mold and drives the cam slider in the machining direction. The cam holder includes a aligning hole having a predetermined inner diameter, a washer inserted into the aligning hole, an outer diameter smaller than the inner diameter of the aligning hole, and a washer having a pin hole at the center. The cam slider is extended and retracted in the reciprocating direction with the mounting portion, one end is in contact with the mounting portion, the other end is in contact with the washer, the coil spring is inserted into the coil spring, and one end is Above It is fixed to the attached portion, the other end and a guide pin inserted into the pin hole of the washer.

It is a perspective view which shows the cam apparatus of embodiment. It is AA sectional drawing of FIG. It is a schematic enlarged view of a washer attachment position. It is a figure which shows the cross section of a part of cam holder and cam slider at the time of decomposition | disassembly. It is a figure which shows the conventional cam apparatus. It is a figure which shows the conventional cam apparatus.

  Hereinafter, the cam apparatus which is embodiment is demonstrated in detail with reference to figures. Although the suspension cam device is described in the embodiment, the type of the cam device is not limited to this, and for example, a lower cam device may be used.

  Drawing 1 is a figure showing cam device 1 of an embodiment. FIG. 1 shows a cam device at the time of installation on a mold after assembly.

  As shown in FIG. 1, a cam device 1 according to an embodiment includes a cam holder 100 fixed to a movable mold (upper mold, not shown), a slidably supported by the cam holder 100, and attached in a return direction by a spring 201. The cam slider 200 which is reciprocated in the reciprocating direction with a predetermined stroke (arrow B in the figure) and a processing tool (not shown) is attached to the side surface in the processing direction, and a fixed mold (lower mold, not shown) And a cam driver 300 that drives the cam slider 200 in a predetermined reciprocating direction (arrow B in the figure).

  FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 2 shows an AA cross section of a part of the cam holder 100 and the cam slider 200.

  As shown in FIG. 2, the cam holder 100 is a member provided with a vertical portion 100b at one end of a horizontal portion 100a. A centering hole 101 is provided below the vertical portion 100b. A stopper 104 that is removable when the cam device 1 is disassembled is provided near the other end of the horizontal portion 100a.

  The washer 102 is loosely inserted into the alignment hole 101. The washer 102 has a flange portion 102a, a cylindrical portion 102b, and a pin hole 102c. Although the guide hole 101 is a through hole in the figure, it may be a non-through hole.

  The cam slider 200 has a guide hole 203 extending in the reciprocating direction. One end of the guide pin 202 is fixed to the bottom portion (attachment portion) of the guide 203 hole. The tip of the guide pin 202 protrudes from the guide hole 203 for a certain length. The tip of the guide pin 202 is inserted into the pin hole 102 c of the washer 102.

  The spring 201 is provided between the bottom portion (attachment portion) of the guide hole 203 and the flange portion 102 a of the washer 102. The spring 201 of the embodiment is a coil spring. The guide pin 202 is inserted in the center of the spring 201. Thereby, the guide pin 202 guides the entire spring 201 that expands and contracts.

  FIG. 3 is a schematic enlarged view of a washer mounting portion. The washer 102 has a flange portion 102a, a cylindrical portion 102b, and a pin hole 102c penetrating the center. As shown in FIG. 3, the outer diameter of the cylindrical portion 102 b of the washer 102 is smaller than the inner diameter of the aligning hole 101. Accordingly, the washer 102 is loosely inserted into the alignment hole 101 with a predetermined distance d.

  The inner diameter of the pin hole 102c of the washer 102 is an inner diameter into which the guide pin 202 can be inserted.

  Bolts 103 are attached to the side holes 102 d of the cylindrical portion 102 b of the washer 102 through the through holes 105 provided in the cam holder 100. This prevents the washer 102 from coming out of the alignment hole 101. A combination in which the through hole 105 is a screw hole and the side hole 102d is a through hole may be used.

  FIG. 4 shows a partial cross section of the cam holder and the cam slider during disassembly. As shown in FIG. 4, the length of the guide pin 202 is longer than the natural length of the spring 201. Thus, at the time of assembly, first, the tip of the guide pin 202 reaches the washer 102, and the tip of the guide pin 202 is inserted into the pin hole 102c of the washer 102.

  Since the washer 102 is loosely inserted into the aligning hole 101, when the tip of the guide pin 202 is inserted into the pin hole 102c of the washer 102, the washer 102 is automatically aligned with the aligning hole 101 first. The Thereafter, one end of the spring 201 comes into contact with the flange portion 102a of the washer 102, and the spring 201 is biased in a compressing direction.

  Further, as shown in FIG. 6, in the conventional configuration in which the guide pin is attached to the cam holder, the cam slider Y is pulled out of the cam holder X by l2 in the drawing in order to remove the spring from the guide pin. On the other hand, as shown in FIG. 4, according to the configuration of the embodiment, the cam slider 200 can be disassembled by pulling it out of the cam holder 100 by l1 in the drawing. Therefore, disassembly and assembly are facilitated.

  As described above, according to the cam device of the embodiment, the disassembly / assembly work is facilitated. Further, since the guide pin penetrates through the entire inner diameter of the spring, the tip of the guide pin does not contact the spring, and a preferable guide structure is obtained.

  Furthermore, since the spring and the guide pin are integrally attached to the cam slider, the amount of pulling out the cam slider at the time of disassembly is reduced, and the disassembly workability is good.

  Furthermore, since the washer is loosely fixed and self-aligning at the time of assembly, processing errors and assembly errors can be absorbed at the time of assembly, and the assembly workability is good.

100: Cam holder 101: Alignment hole 102: Washer 103: Bolt 104: Stopper 200: Cam slider 201: Spring 202: Guide pin 203: Guide hole 300: Cam driver

Claims (5)

One of the first mold and the second mold is attached to a mold for pressing the workpiece by driving in the pressing direction, a cam holder attached to the first mold, and a process for processing the workpiece A tool can be installed, and a cam slider attached to the cam holder so as to be slidable in a predetermined reciprocating direction; a cam driver attached to the second mold and driving the cam slider in the processing direction; A cam device having
The cam holder is
A centering hole with a predetermined inner diameter;
A washer that is inserted into the alignment hole, has an outer diameter smaller than the inner diameter of the alignment hole, and has a pin hole at the center,
The cam slider is
A mounting part;
A coil spring that expands and contracts in the reciprocating direction, one end abuts on the mounting portion, and the other end abuts on the washer;
A guide pin inserted into the coil spring, having one end fixed to the mounting portion and the other end inserted into the pin hole of the washer;
Cam device.   The cam device according to claim 1, wherein a length of the guide pin is longer than a natural length of the coil spring.   The cam apparatus according to claim 1, wherein the cam holder includes a bolt that supports a side surface of the washer.   The cam device according to any one of claims 1 to 3, wherein the washer has a flange portion with which the coil spring abuts.   5. The cam device according to claim 1, wherein the cam slider has a guide hole that accommodates the coil spring, and the attachment portion is provided at one end of the guide hole.