JP2015051463A - Counter cam mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cam mechanism whole weight of which is reduced and which is down-sized.SOLUTION: A cam mechanism comprises: a driver unit which is pressed down by descent of a movable metal mold; a circular arc-shaped movement transmission member which transmits downward movement of the driver unit and has an upper surface part and a lower surface part both of which have a circular peripheral surface; a vertical slide unit having a tool fixing surface, to a rear end part of which an end of the circular arc-shaped movement transmission member is slidably contacted or connected, which is reciprocated in a predetermined direction and to a tip of which a tool is fixed; a holder unit which guides and supports the circular arc-shaped movement transmission member by a curve surface sliding part having a slide curve surface; and a guide part which contacts an upper surface part of the circular arc-shaped movement transmission member and so guides the circular arc-shaped movement transmission member that a lower surface part of the circular arc-shaped movement transmission member is not deviated from the slide curve surface.

Description

  The present invention relates to a die counter cam device for bending a work edge such as bending of a panel edge of an automobile or the like by negative angle forming.

  Conventionally, in processing such as bending of a workpiece, a push-up cam device is known as a mold device suitable for upper bending processing. As described in Patent Document 1 filed by the applicant, the driver unit 12 is moved up and down by the moving mold, and the horizontal slide unit is moved horizontally by the inclined cam surface of the driver unit 12. 13, a vertical slide unit 14 which is moved in the vertical direction by the horizontal movement of the horizontal slide unit 13 and has a mounting surface for the processing tool 14a, and an elastic means 15 for returning the horizontal slide unit 13 to its original position, A guide block 16 that transmits the urging force of the elastic means 15 to the horizontal slide unit 13 and guides the horizontal movement of the horizontal slide unit 13 and these cam mechanisms are accommodated in a bottomed rectangular cylindrical holder unit 17. Is known.

JP 2008-307546 A

However, in the conventional push-up cam device, as shown in FIG. 9, the side wall 17b of the holder unit 17, 17c is anti during machining by the pressing force and the work 18 in the horizontal direction at the time of depression machining of the driver unit 12 It is pushed outward by force (thick arrow). If this is repeated, the life of the driver unit 12 will be adversely affected. Further, due to the side wall 17b of the holder unit 17 and the side walls extending perpendicular to the side wall 17b, the entire push-up cam device becomes large, which hinders downsizing of the entire mold.

  Further, the push-up cam device is often used for bending as described above, and a frictional force is generated between the tool and the workpiece after the processing. When the vertical slide unit to which the tool is attached descends due to this frictional force, the vertical slide unit does not follow the movement of the press, the position is initially fixed by the frictional force, and then is a return means The return spring performs a return movement at a rapid speed. There has been a case where a large impact force generated when this sudden movement is stopped and the cam unit is damaged, and it has been a problem to effectively absorb and reduce the impact force. The counter cam device according to the present invention has been proposed in order to solve such a problem.

The gist for solving the above-mentioned problems of the counter cam device of the present invention is to achieve a purpose by transmitting a downward movement of the driver unit and the driver unit pushed down by the lowering of the moving mold , a circular arc movement transmission member have a top portion and a bottom surface portion, a tool mounting surface for securing the tool to the distal end portion with an end portion of the arcuate movement transmission member is coupled to the rear end portion is reciprocally moved in a predetermined direction An upper and lower slide unit, a holder unit that guides and supports the arc-shaped movement transmitting member by a curved sliding portion formed with a sliding curved surface, and an arc-shaped movement transmitting member that abuts the upper surface of the arc-shaped movement transmitting member And a guide portion for guiding the lower surface portion so as not to deviate from the sliding curved surface.

Also, a return means for returning the vertical slide unit to the original position, that a stopper member for restricting the return position of the vertical slide unit is provided, the end portion of the vertical slide unit and an end portion of the driver unit, The ends of the arc-shaped movement transmission member are in sliding contact with each sliding surface, or the end of the driver unit and the end of the vertical slide unit are pin-coupled to the end of the arc-shaped movement transmission member. The upward and downward slide unit is pushed up in the vertical direction or in an oblique direction with an inclination angle . The vertical slide unit has a part of the return means built in the back, and the vertical direction of the holder unit. The position of the end surface on the slide unit side in side view is the position of the end surface on the workpiece side of the vertical slide unit or the tool fixed to the vertical slide unit. Compared to the location, it is in the position of either or flush in the retracted position, a portion of the holder unit is extended upward, vertical movement of the driver unit by a portion of the extending portion guide The shock absorbing material for absorbing the impact force generated when the vertical slide unit is returned by the urging force of the return means is press-fitted into the stopper member or the buffer material hole of the holder unit. together are fixed, in order to prevent damage from without deformation reducing the volume of the cushioning material, is intended to include that, chamfering by lines and curves at the entrance portion of the hole for inserting or sticking.

According to the counter cam device of the present invention, the arc-shaped movement transmitting member prevents the driver unit and the upper and lower slide units from spreading outward due to the reaction force during workpiece machining. This reduces the burden on the holder unit, simplifies the structure of the holder unit , reduces the thickness, etc., eliminates the need for side walls around the vertical slide unit, reduces the overall weight of the cam device, and reduces the size. And can be installed in a small space as the entire mold is reduced in size.

  In the conventional push-up cam device, the return means has an elastic means 15 attached to the lower part of the horizontal slide unit 13 as shown in FIG. 9 to increase the height of the push-up cam device as a whole. In the counter cam device of the present invention, as shown in FIG. 7, since the return means is built in the back of the vertical slide unit, the height dimension can be reduced, and the cylindrical shape opened only above the vertical slide unit. Since it is built in the housing portion 6f and can be attached and detached by a plate 6d fixed to the upper end surface portion of the holder unit 3 with bolts, disassembly and assembly are easy. In addition, the stopper member and the cushioning material determine the return position of the upper and lower slide units and reduce the impact force when contacting.

Compared to the end face position the end surface position of the workpiece side of the working side of the tool which is fixed to the vertical slide unit or upper and lower sliding unit Holder unit, since the one or flush position in the retracted position, the mold This eliminates overhang on the side and improves workability. Further, a part of the holder unit is extended upward, and the vertical movement of the driver unit is guided and supported by a part of the extended part, so that the number of parts is reduced and the counter cam is compact and the cost is reduced. becomes apparatus exhibits various excellent effects that might have a.

They are a schematic longitudinal cross-sectional view (A) explaining the general | schematic structure and use condition of the counter cam apparatus 1 of this embodiment, and the partial cross section figure (B) which shows the Example of the guide means 9. FIG. It is sectional drawing of the counter cam apparatus 1 of this embodiment . It is the perspective view (A), side view (B), front view (C) which shows an example of the attachments 10 and 11, and the perspective view (A), side view (B), and front view (C) of another example. It is the perspective view seen from diagonally upward of the counter cam apparatus 1 of this embodiment . It is the perspective view seen from the diagonal lower part of the counter cam apparatus 1 of this embodiment . It is a perspective view which shows schematic structure of the counter cam apparatus 1a of other embodiment of this invention. It is the front view (A) and back view (B) of the counter cam apparatus 1a of other embodiment of this invention . It is the top view (A), schematic longitudinal cross-sectional view (B), and bottom view (C) of the counter cam apparatus 1a of other embodiment of this invention . It is sectional drawing (A)-(D) which shows the example of the press-fit or adhering of the shock absorbing buffer material 3e. It is a schematic longitudinal cross-sectional view explaining the schematic structure and use condition of the counter cam apparatus 20 of a prior art example.

As shown in FIG. 1, the counter cam device 1 of the present embodiment causes the arcuate movement transmitting member 2 to slide in a circular arc shape on the curved sliding portion 3 a of the holder unit 3, thereby pressing the driver unit during processing. The reaction force of the vertical slide unit is received at the lower part of the holder unit 3 .

Counter cam device 1 of this embodiment, as shown in FIG. 1, a driver unit 5, which is pushed down by the descent of the movable mold (not shown), arcuate movement transmitting member for transmitting the downward movement of the driver unit 5 2, a vertical slide unit 6 having a tool mounting surface for securing the tool 14a to Rutotomoni tip 6b to reciprocate in a predetermined direction end 2a of the arcuate movement transfer member 2 is connected to the rear portion 6a, the arcuate movement transfer member 2 at least chromatic and a holder unit 3 for guiding and and supported in a sliding curved surface curved sliding portion 3a formed.

Arcs type mobile transmitting member 2, it replaces the conventional horizontal slide unit 13, an arc-type rigid sliding member of a required width. Both end portions 2a, 2b are you have a part of the function of the vertical slide unit 14 and the driver unit 12.

The lower surface 2c of the circular arc-type movement transmission member 2 is in sliding contact with the curved surface sliding portion 3a of the holder unit 3, the pressure of the driver unit 5 is the curved surface sliding portion 3a receives. Therefore, the horizontal component force acting on the side wall 3b of the holder unit 3 is reduced, and the deformation action is reduced.

Driver unit 5, the vertical slide unit 6 and arcuate movement transmitting member 2, after completing the bent end of the workpiece 18 by the movable die of the drop is returned to the original position in accordance with increase of the movable mold There is a need.

Return means, as shown in FIG. 2-A, you built coil spring 6e receives a reaction force in a fixed plate 6d with bolts to the upper end face of the holder unit 3 at the back of the vertical slide unit 6. Further, when the tool is pulled away from the workpiece 18 after machining, if the vertical slide unit 6 is lowered against the frictional force generated between the tool and the workpiece 18, a large impact force is generated when contacting the positioning member. since, the impact force cushioning material 3e to relieve is provided, at the same time, Ru stopper member 3f is provided to position the return location of the vertical slide unit 6.

Thus, with increasing of the movable mold, the upper and lower slide unit 6 and the tool 14a is returned by the urging force of the coil spring 6e. Then, the arc-shaped movement transmission member 2 is returned to the original position via the pin 8, and the driver unit 5 is also returned to the original position via the pin 7. Further, the vertical slide unit 6 returns to a predetermined position by the stopper member 3f, and a large impact force when the vertical slide unit 6 is lowered is also reduced by the buffer material 3e.

Further, as shown in FIG. 1, the end 5a of the driver unit 5 and the rear end 6a of the vertical slide unit 6 are pinned to the ends 2a and 2b of the arc-shaped movement transmitting member via attachments 10 and 11, respectively. 7 and 8 are pin-coupled. The attachments 10 and 11 are in sliding contact with the lower surface of the driver unit 5 and the lower surface of the upper and lower slide unit 6, respectively, and are movable in the horizontal direction . As shown in FIG. 2B, the shapes of the attachments 10 and 11 can be formed so as to be movable, for example, when the slidable contact surface on the upper surface is flat or in a mountain shape (V shape).

Further, a portion of the member or holder unit 3 of the counter cam device 1, Ru guide means 9 for arc type moving transmission member 2 is guided so as not to deviate from the arcuate predetermined trajectory is provided. As this guide means 9, there is also a method of pressing the head of the bolt against the guide groove 2d as shown in FIG. As shown in FIGS. 1B and 1D, various guide means such as a side wall groove portion, a guide groove, a guide protrusion, and an arc-shaped groove are proposed.

As shown in FIGS. 1 to 2-A, side view the position of the end face 3d of the slide unit side of the holder unit 3, the end face 6c Moshiku the vertical slide unit 6 of the tool 14a which is fixed to the vertical slide unit 6 Compared to the position of the end surface on the workpiece side, the workpiece is in a retracted position or in a flush position.

It was able to do this, because the arcuate movement transmission member 2 and the holder unit 3, Ru push-up curved. Conventionally, as shown in FIG. 9, since the vertical slide unit 14 is linearly pressed by the horizontal slide unit 13 and pushed upward by the component force, the thick side wall 17 b that receives the lateral pressure in the holder unit 17 is provided. It was necessary. According to the present embodiment , since the thick side wall 17b is eliminated and the end face 6c of the vertical slide unit 6 is retracted, the overhang on the mold side (difference b between the end faces 19a and 19b in FIG. 9) is eliminated (in FIG. 1). Difference a) between the end faces 19a and 19c .

As shown in FIGS. 1 to 2-A, a portion 3e of the holder unit 3 is extended upward, the portion of the extending portion is vertical movement of the driver unit 5 Ru is supported is guided and. This holder unit 3 makes it compact and eliminates the need for the up-and-down slide unit 14 as in the prior art, so that the overall size of the counter cam device 1 can be made compact.

When such a counter cam device 1 is used, first, the moving mold of the mold is lowered from the state where the driver unit 5 is raised to the top dead center, and the driver unit 5 is pushed down. Thereby, the arc-shaped movement transmission member 2 is pushed down via the attachment 10 and the pin 7 and is rotated at an appropriate angle along the curved surface of the curved sliding portion 3a with which the lower surface 2c is in sliding contact.

By the rotation of the circular arc-type movement transmitting member 2, the vertical slide unit via the pin 8 and the attachment 11 6 also moves upward. The tool 14a ascends together with the vertical slide unit 6, and the end portion of the workpiece 18 is bent as shown in FIG.

Thereafter, when the movable die is raised to the top dead center from the bottom dead center, depressed state is released, by the return means built vertically slide unit 6 (the coil spring 6e), the vertical slide unit 6 is lowered, and at the same time By the vertical slide unit 6, the arc-shaped movement transmission member 2 is pushed back in the reverse direction via the pin 8 and the attachment 11, and the driver unit 5 is also located at the top dead center via the pin 7 and the attachment 10. Return to. Thus, the original state is restored.

As shown in FIGS. 5 to 7, the counter cam device 1 a according to the second embodiment includes a movement transmission structure between the arc-shaped movement transmission member 2 and the driver unit 5, or the arc-shaped movement transmission member 2 and the vertical slide unit 6. In the attachment 11 and the end portion 2a of the movement transmitting member 2, and the attachment 10 and the end portion 2b of the movement transmitting member 2, the curved surface portion having an appropriate radius r is an arcuate slide. It becomes a moving surface, and the movement transmission part is surface joined . The structure is simpler than the pin connection, the number of parts is reduced, and the manufacturing cost can be reduced .

  Since the driver unit 5, the vertical slide unit 6 and the arc-shaped movement transmission member 2 are not connected directly or indirectly, in this case as well, after the end bending process of the workpiece 18 is completed, the moving mold rises. The return means for returning the vertical slide unit 6, the arc-shaped movement transmission member 2 and the driver unit 5 to their original positions is required.

Carriage return means, as shown in FIG. 7, the coil spring 6e receives a reaction force in a fixed plate 6d with bolts to the upper end surface of the holder unit 3 is provided, it provided the coil spring 6e in the back of the vertical slide unit 6 It is built in a cylindrical storage portion 6f that is opened only on the top. In addition, by providing return means in the vertical slide unit 6, the arc-shaped movement transmission member 2 is also returned to the original position by the movement transmission mechanism . The coil spring 6e is not limited to this, and a gas spring or the like may be used to generate an urging force.

Direction pushing up the top and bottom slide unit 6, as shown in FIG. 7, the slide plate 6g in Examples 1 and 2 is guided in the vertical direction across the neck portion of the back of the vertical slide unit 6 from both sides, which Not limited to this, it can also be pushed up in an oblique direction with an inclination angle . The shock absorbing material 3e at the bottom dead center of the vertical slide unit 6 is press-fitted into the buffer material hole of the holder unit 3 as shown in FIGS. 5, 6, and 8A to 8D. It is fixed. The buffer material 3e is an elastic body such as urethane, for example. Then, in order to prevent damage from without deformation reducing the volume of the cushioning material, as shown in FIG. 8 (A) ~ (C) , the chamfered by a straight line and curve entrance section of the insertion or holes you sticking Is preferred .

In 1,1a above-described counter cam device, since at the arc-shaped curved surface sliding portion 3a of the holder unit 3 receives the horizontal force of the pressing force in the vertical and horizontal directions, lateral pressure is reduced, as in the prior art Cantilevered and no thick wall .

The counter cam devices 1 and 1a of the present embodiment can be applied to various apparatus devices such as various cam devices by making the load action by the combination of cams that linearly move into a curve, thereby making the entire device compact .

1,1a counter cam device,
2 arc-shaped movement transmission member, 2a end,
2b end, 2c bottom surface,
2d guide groove,
3 Holder unit, 3a Curved surface sliding part,
3b side wall, 3c guide part,
3d end face, 3e cushioning material,
3f stopper member,
4 Driver guide,
5 Driver unit, 5a end,
6 Vertical slide unit, 6a Rear end,
6b tip, 6c end face,
6d plate, 6e coil spring,
6f storage section, 6g slide plate,
7,8 pins,
9 Guide means,
10,11 attachment,
12 Driver unit,
13 Horizontal slide unit,
14 vertical slide unit, 14a tool,
15 elastic means,
16 guide blocks,
17 Holder unit,
18 works,
19a, 19b, 19c end faces,
20 A counter cam device according to a conventional example.

Claims (11)

A driver unit pushed down by the lowering of the moving mold,
A circular arc movement transmission member downward movement convey, together have a circumferential surface shape of the upper surface portion and lower surface portion of the driver unit,
An up-and-down slide unit having a tool mounting surface that is slidably contacted or coupled to a rear end portion and reciprocated in a predetermined direction and has a tool attached to the tip portion;
A holder unit that guides and supports the arc-shaped movement transmitting member with a curved sliding portion formed with a sliding curved surface;
A guide portion that contacts the upper surface portion of the arc-shaped movement transmission member and guides the lower surface portion of the arc-shaped movement transmission member so as not to deviate from the sliding curved surface;
A counter cam device. The counter cam device according to claim 1, wherein an upper surface portion of the arc-shaped movement transmission member is provided on an upper surface of a main body of the arc-shaped movement transmission member. 2. The counter cam device according to claim 1, wherein the arc-shaped movement transmitting member has an arc-shaped groove, and an upper surface portion of the arc-shaped movement transmitting member is provided in the arc-shaped groove. The counter cam device according to claim 1, wherein the arc-shaped movement transmitting member has an arc-shaped protrusion, and an upper surface portion of the arc-shaped movement transmitting member is provided on the arc-shaped protrusion. Return means for returning the vertical slide unit to the original position and a stopper member for regulating the return position of the vertical slide unit;
Counter cam apparatus according to any one of claims 1 to 4, characterized in. The end of the driver unit and the end of the vertical slide unit are in sliding contact with each sliding surface of the end of the arc-shaped movement transmitting member, or the end of the driver unit and the vertical slide unit The end of the slide unit is pin-coupled to the end of the arc-shaped movement transmission member,
Counter cam apparatus according to any one of claims 1 to 5, wherein. The up-and-down direction of the vertical slide unit is a vertical direction or an oblique direction with an inclination angle;
A counter cam device according to any one of claims 1 to 6 . The vertical slide unit has a part of the return means built in the back thereof;
The counter cam device according to claim 5 . Is the position of the end surface of the holder unit on the side of the vertical slide unit viewed from the side as compared to the position of the end surface on the workpiece side of the tool fixed to the vertical slide unit or the vertical slide unit? Or be in a level position,
Counter cam apparatus according to any one of claims 1 to 8, characterized in. A part of the holder unit is extended upward, and the vertical movement of the driver unit is guided and supported by a part of the extension part;
Counter cam device according to claim 1, wherein 9 of the. An impact force absorbing cushioning material that absorbs an impact force generated when the upper and lower slide units are returned by the urging force of the return means is press-fitted or fixed in the stopper member or the hole for the cushioning material of the holder unit. In addition, in order to prevent damage due to deformation without reducing the volume of the cushioning material, chamfering the entrance portion of the hole to be inserted or fixed with a straight line and a curve,
The counter cam device according to claim 5, wherein