JP6482931B2 - Cam device - Google Patents

Description

  The present invention relates to a unitized cam device that is mounted between a fixed mold and a movable mold in order to drill holes in a workpiece.

  Large metal plates such as automobile bodies are 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.

  As such a cam device, for example, a cam driver that is mounted on a fixed mold and a movable mold and used for processing a molded product and is fixed to the movable mold, and a cam slider that is slid by the cam driver, There is a cam unit that includes a cam base that is fixed to a fixed mold so as to slidably support the cam slider, and has a self-aligning means provided on a sliding contact surface between the cam slider and the cam base ( For example, see Patent Document 1).

  Also, a mounting base fixed to the movable mold, a cam slider supported by the mounting base and urged in the return direction by an elastic member and reciprocated in a predetermined direction with a desired stroke, and the cam slider acting on the contact surface This is a suspension cam unit consisting of a cam driver that is moved in the direction and fixed to a fixed mold. The mounting base and cam slider are provided on either side wall, and the base is fixed. There is a suspension cam unit that is assembled by a slide keeper that engages a sliding engagement portion provided on the other end with an engagement portion provided on the tip portion, and slidably supports the other (see FIG. For example, see Patent Document 2).

  Here, in both the cam device of Patent Document 1 and the suspension cam device of Patent Document 2, the sliding contact portion between the cam slider and the cam base has a V-shaped cross-sectional shape combining tapered surfaces as automatic alignment means.

JP 2000-135526 A JP 2000-32024 A

  In recent years, a work (workpiece) of a high-tensile steel plate has been processed with a press die. Here, when machining the trim forming part of the workpiece of the high-tensile steel plate using the cam device of Patent Documents 1 and 2, at the timing when the machining tool attached to the cam slider of the cam device comes into contact with the workpiece, The processing tool may move (escape) in directions other than the processing direction.

  This is because the sliding part of the cam slider and cam driver has a V-shaped cross section, so the thrust load applied to the machining tool is applied in the direction in which the slope deviates (climbs), and the cam slider and cam driver are displaced. This is because it is generated.

  As a result, burrs may occur in the trim processing portion of the workpiece, or processing defects that may affect the product quality of the workpiece may occur. As a countermeasure, at present, a portion for receiving a side pressure is set on the press die side so that the processing tool does not move (escape) except in a predetermined processing direction.

  The present invention has been made to solve such a conventional problem. When a workpiece (workpiece) of a high-tensile steel plate is processed with a press die, the processing tool moves in a direction other than the processing direction. It is to provide a cam device that can prevent (escape) from happening.

According to the present invention, a moving mold is attached to a mold for pressing a workpiece by driving it in the pressing direction. The cam base is attached to the moving mold, and is slidably attached to the cam base in the processing direction. A moving die press that has a cam slider that can be installed with a machining tool that applies a load in the thrust direction perpendicular to the machining direction, and a cam driver that is attached to a fixed die and drives the cam slider in the machining direction. Cam device in which a cam slider and a cam driver are engaged by movement in a direction, the cam slider having a rectangular groove section having a first groove surface and a second groove surface perpendicular to the thrust direction, and both sides of the groove portion In addition, the cam driver has a first projecting surface and a second projecting surface perpendicular to the thrust direction, having a first lower surface and a second lower surface perpendicular to the first groove surface and the second groove surface. A protrusion having a rectangular cross section, and a first upper surface and a second upper surface perpendicular to the first protrusion surface and the second protrusion surface on both sides of the protrusion, and when the cam slider is engaged with the cam driver, the thrust is The load in the direction is borne only by the first groove surface and the first projection surface, or only by the second groove surface and the second projection surface, and the load in the pressing direction is the first lower surface, the first upper surface, and the second The lower surface and the second upper surface bear .

  According to the cam device of the present invention, it is possible to prevent the machining tool from moving (escape) in directions other than the machining direction, and it is possible to improve the formability of the high-tensile steel plate.

It is a figure which shows the structural example of the cam apparatus of this embodiment. It is a bird's-eye view of the cam apparatus of this embodiment. It is the sectional view on the AA line of FIG. It is the arrow view seen from the D direction of Drawing 1 about the processing tool of the cam device of this embodiment. It is a figure which shows the other structural example of the cam apparatus of this embodiment. It is a figure which shows the other structural example of the cam apparatus of this embodiment.

  Hereinafter, a cam device according to an embodiment of the present invention will be described in detail with reference to the drawings. Although the suspension cam device is described in the present embodiment, the type of the cam device is not limited to this.

  FIG. 1 is a diagram illustrating a configuration example of a cam device according to the present embodiment. FIG. 2 is a bird's-eye view of the cam device of this embodiment. 3 is a cross-sectional view taken along line AA in FIG.

  As shown in FIGS. 1 to 3, the cam apparatus 1 of the present embodiment is fixed to a moving mold (not shown) of a press mold that reciprocates in the B direction (hereinafter referred to as the press direction B) in FIG. 1. The cam base 100 is slidably supported by the cam base 100 and is urged in the return direction by an elastic member (not shown), and is processed in a predetermined stroke (C in FIG. 1, hereinafter referred to as a processing direction C). And a protrusion that is fixed to a fixed mold (not shown) and fits into a groove 201b (cam slider engaging portion) of the cam slider 200. The cam driver 300 includes a cam driver 300 having a 302a (cam driver engaging portion) and driving the cam slider 200 in a predetermined processing direction C.

  In addition, since the configuration in which the cam base 100 slidably supports the cam slider 200, the configuration in which the cam slider 200 is urged in the return direction by an elastic member, and other general configurations of the cam device are known, Detailed description is omitted (for example, refer to Patent Documents 1 and 2).

  As shown in FIGS. 2 and 3, the cam slider 200 of the present embodiment includes a cam slider body 201 and guide members 202 a and 202 b. The cam slider body 201 has a recess 201 a having a predetermined depth on the surface with respect to the cam driver 300. The guide members 202a and 202b are attached to both sides of the recess 201a in contact with the bottom surface and both inner side surfaces of the recess 201a. Thereby, a groove 201b (cam slider engaging portion) having a rectangular cross section having side surfaces 201c and 201d is formed between the guide members 202a and 202b.

  The cam driver 300 of this embodiment includes a cam driver main body 301 and a convex guide member 302. The convex guide member 302 is attached to the surface of the cam driver main body 301 with respect to the cam slider 200. The convex guide member 302 has a protrusion 302a (cam driver engaging portion) having a rectangular cross section having side surfaces 302b and 302c.

  As shown in FIGS. 1 and 2, the cam driver 300 according to the present embodiment includes a side pressure receiving portion 303 that abuts the lower surface of the processing tool T so that the processing tool T does not fall in the processing direction C.

  In the cam slider 200 and the cam driver 300 according to the present embodiment, the groove 201b having a rectangular cross section of the cam slider 200 and the protrusion 302a having a rectangular cross section of the cam driver 300 are fitted and slide in the processing direction C.

  As shown in FIG. 4, when processing a trim forming part of a workpiece of a high-tensile steel plate, the tip portions T1 and T2 of the machining tool T on the workpiece cutting side attached to the cam slider 200 are sheared of the workpiece. Receives reaction force due to resistance. At this time, the tip T1 of the machining tool T receives a load in a thrust direction other than the machining direction C (A in FIG. 4, hereinafter referred to as the thrust direction A), and the tip T2 of the machining tool T is in the machining direction C. And a direction of 90 ° (B ′ in FIG. 1, hereinafter referred to as a load direction B ′). The thrust direction A is a direction perpendicular to the load direction B ′ and the processing direction C.

  Since the side surfaces 201c and 201d of the groove 201b having a rectangular cross section of the cam slider 200 and the side surfaces 302b and 302c of the protrusion 302a having a rectangular cross section of the cam driver 300 are surfaces perpendicular to the thrust direction A, the load in the thrust direction A Since the side surface of the groove 201b having a rectangular cross section of the cam slider 200 and the side surface of the protrusion 302a having a rectangular cross section of the cam driver 300 are in contact with each other, the machining tool can be prevented from moving in the thrust direction A.

  Further, since the side pressure receiving portion 303 comes into contact with the lower surface of the processing tool T, the load in the pressing direction B is borne by the lower surface of the processing tool T and the side pressure receiving portion 303 in contact with each other. It is possible to prevent movement in the direction B.

  5 and 6 are diagrams showing another configuration example of the cam device of the present embodiment. In the above description, the cam slider main body 201 is provided with the groove 201b and the cam driver main body 301 is provided with the protrusion 302a. However, the present invention is not limited to this, and a surface perpendicular to the thrust direction that bears the thrust load is provided. Both the cam slider body 201 and the cam driver body 301 may be provided.

  5A, the cam slider body 211 is provided with a groove (cam slider engaging portion) having a rectangular cross section composed of side surfaces 211b and 211d and a bottom surface 211c, and the guide member 312 has a projection portion (including a vertical surface 312b and an inclined surface 312c). A mode in which a cam driver engaging portion is provided is shown. When the cam slider receives a thrust load from the left side of the figure, the side surface 211b and the vertical surface 312b come into contact with each other and slide to suppress the cam slider from moving to the right side of the figure. Further, the lower surface 221a and the upper surface 312a come into contact with each other, and the lower surface 211e and the upper surface 312d come into contact with each other and slide.

  In FIG. 5B, the cam slider body 221 is provided with a rectangular cross-section groove portion (cam slider engaging portion) including side surfaces 221b and 221d and a bottom surface 221c, and the guide member 322 has a rectangular shape including side surfaces 322b and 322c and an upper surface 322c. The aspect with which the protrusion part (cam driver engaging part) of a cross section is provided is shown. The side surface 221b and the side surface 322b abut and slide, and the side surface 221d and the side surface 322d abut and slide, thereby suppressing the cam slider from moving left and right in the figure. Further, the lower surface 221a and the upper surface 322a come into contact with each other, and the lower surface 221e and the upper surface 322e come into contact with each other and slide.

  In FIG. 5C, the cam slider main body 231 is provided with a groove portion (cam slider engaging portion) having a wide rectangular cross section composed of side surfaces 231b and 231d and a bottom surface 231c, and the guide member 332 includes side surfaces 332b and 332d and an upper surface 332c. The aspect provided with the protrusion part (cam driver engaging part) of a wide rectangular cross section is shown. The side surface 231b and the side surface 332b abut and slide, and the side surface 231d and the side surface 332d abut and slide, thereby suppressing the cam slider from moving left and right in the figure. Further, the bottom surface 231c and the top surface 332c come into contact with each other and slide.

  6A, the cam slider main body 241 is provided with a groove portion (cam slider engaging portion) having a cross section combined with a V-shaped cross section composed of inclined surfaces 241c and 241d and a rectangular cross section composed of side surfaces 241b and 241e. A mode in which a protrusion (cam driver engaging portion) having a cross section combined with a V-shaped cross section composed of inclined surfaces 342c and 342d and a rectangular cross section composed of side surfaces 342b and 342e is shown. By providing a taper at the tip of the protrusion, it is possible to prevent the protrusion from riding on the shoulder of the groove when the groove and the protrusion are fitted. The side surface 241b and the side surface 342b abut and slide, and the side surface 241e and the side surface 342e abut and slide, thereby suppressing the cam slider from moving left and right in the figure. Further, the lower surface 241a and the upper surface 342a abut, and the lower surface 241f and the upper surface 342f abut and slide.

  In FIG. 6B, the cam slider body 251 is provided with a rectangular cross-sectional cutout (cam slider engaging portion) composed of a side surface 251b and a bottom surface 251c, and the guide member 352 has a protrusion (including a vertical surface 352b and a slope 352c). A mode in which a cam driver engaging portion is provided is shown. When the cam slider receives a thrust load from the left side of the figure, the side surface 251b and the vertical surface 352b come into contact with each other and slide to suppress the cam slider from moving to the right side of the figure. Further, the lower surface 251a and the upper surface 352a come into contact with each other and slide.

  In FIG. 6C, the cam slider body 261 is provided with a protrusion having a rectangular cross section (cam slider engaging portion) including side surfaces 261b and 261d and an upper surface 261c, and the guide member 362 is a rectangle including side surfaces 362b and 362d and a bottom surface 362c. The aspect with which the groove part (cam driver engaging part) of a cross section is provided is shown. The side surface 261b and the side surface 362b come into contact with each other and slide, and the side surface 261d and the side surface 362d come into contact with each other and slide to prevent the cam slider from moving to the left and right in the figure. Further, the lower surface 261a and the upper surface 362a abut, and the lower surface 261e and the upper surface 362e abut and slide.

  In the above embodiment, the cam slider has a surface perpendicular to the thrust direction, and the cam driver has a surface perpendicular to the thrust direction that contacts the surface perpendicular to the thrust direction of the cam slider engaging portion. As described, if the slope does not shift (does not climb), there may be a slight angle with respect to the thrust direction. This angle is determined by comprehensively considering the outer size of the cam device, the structure, the position of the machining tool, the friction coefficient of the slope, and the like.

  As described above, according to the cam device of the present embodiment, it is possible to prevent the machining tool from moving (escape) other than the machining direction such as the thrust direction or the press direction, and forming a high-tensile steel plate. It becomes possible to improve the property.

  Furthermore, according to the cam device of the present embodiment, the side pressure receiver is not formed by the enlargement of the press die or the addition of parts, but is realized in the cam unit, thereby achieving simplification of the die shape. The simplification of the mold shape has the further effect of reducing the press mold design man-hours and simplifying the press mold processing.

DESCRIPTION OF SYMBOLS 1: Cam apparatus 100: Cam base 200: Cam slider 201: Cam slider main body 202: Guide member 300: Cam driver 301: Cam driver main body 302: Convex guide member 303: Side pressure receiving part

Claims (3)

The moving mold is attached to the mold that drives the workpiece by pressing it in the pressing direction,
A cam base attached to the moving mold;
Said slidably mounted in the working direction in the cam base, the processing tool load is applied to the workpiece to the machining at the machining direction perpendicular thrust direction can be installed, and the cam slider,
Attached to the fixed mold, have a, a cam driver for driving the cam slider to the working direction,
A suspension cam device in which the cam slider and the cam driver are engaged by an operation in a pressing direction of the movable mold ,
The cam slider is
A groove of rectangular cross-section having a first groove surface perpendicular to the thrust direction and a second groove surface,
Having a first lower surface and a second lower surface perpendicular to the first groove surface and the second groove surface on both sides of the groove portion ;
The cam driver is
A rectangular cross-sectional protrusion having a first protrusion surface and a second protrusion surface perpendicular to the thrust direction;
A first upper surface and a second upper surface perpendicular to the first and second protrusion surfaces on both sides of the protrusion;
When the cam slider and the cam driver are engaged,
The load in the thrust direction is borne only by the first groove surface and the first projection surface, or only by the second groove surface and the second projection surface ,
The load in the pressing direction is borne by the first lower surface and the first upper surface, and the second lower surface and the second upper surface,
A cam device characterized by that. The moving mold is attached to the mold that drives the workpiece by pressing it in the pressing direction,
A cam base attached to the moving mold;
A cam slider that is slidably attached to the cam base in a machining direction, and a machining tool that applies a load in a thrust direction perpendicular to the machining direction when machining the workpiece;
A cam driver attached to a fixed mold and driving the cam slider in the processing direction;
A suspension cam device in which the cam slider and the cam driver are engaged by an operation in a pressing direction of the movable mold,
The cam slider is
A rectangular cross-sectional protrusion having a first protrusion surface and a second protrusion surface perpendicular to the thrust direction;
A first lower surface and a second lower surface perpendicular to the first projecting surface and the second projecting surface on both sides of the projecting portion;
The cam driver is
A rectangular cross-section groove portion having a first groove surface and a second groove surface perpendicular to the thrust direction;
A first upper surface and a second upper surface perpendicular to the first groove surface and the second groove surface on both sides of the groove portion;
When the cam slider and the cam driver are engaged,
The load in the thrust direction is borne only by the first projection surface and the first groove surface, or only by the second projection surface and the second groove surface,
The load in the pressing direction is borne by the first lower surface and the first upper surface, and the second lower surface and the second upper surface,
A cam device characterized by that. Said cam driver, said machining tool to contact the surface of the cam driver side, to claim 1 or 2, characterized in that it has a side pressure receiving portion to have a surface parallel to the working direction and the thrust direction The cam apparatus of description.

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