JP5437862B2 - Processing equipment - Google Patents

Description

  The present invention relates to a machining apparatus for machining a workpiece by advancing a slider having a machining means provided at the tip.

  2. Description of the Related Art Conventionally, a method of performing two types of machining on a workpiece from different directions in one step is widely known (see Patent Document 1).

  In Patent Document 1, a curved blade that performs wrist-like molding on a workpiece, and a cam piece that drives a cam slider that is provided with a tool that performs cam piercing molding on the workpiece are provided in an upper mold, By lowering the mold, first, the cam blade is retracted and the like blade is subjected to wrist-like molding, and then the upper mold is lifted to retract the curved blade. A technique for performing cam piercing by advancing the cam slider with a cam piece is disclosed.

  Further, in this document, a link that performs seesaw motion with respect to the cam slider via a support shaft is provided, and when the upper die is lowered, the cam piece pushes down the rear end of the link, thereby retracting the cam slider. When the upper mold is raised, the stopper provided on the link is in contact with the thrust receiver provided on the cam slider (the rotation of the link is blocked). The cam slider is advanced by bringing the cam piece into contact with the rear end.

  Furthermore, in FIGS. 1 to 3 of Patent Document 1, it is described that the link is located on the side of the cam slider.

JP-A-10-314856

  In Patent Document 1 described above, since the link is located on the side of the cam slider, a bending moment is generated in the link and the cam slider when the cam slider moves forward, and the degree of straight movement of the cam slider (straightness) ) May decrease. As a result, processing accuracy is deteriorated.

  As a method for suppressing such a decrease in the straightness of the cam slider, it is conceivable to increase the rigidity of the link and the cam slider, but the entire apparatus becomes large.

  The present invention has been made in consideration of such problems, and an object of the present invention is to provide a machining apparatus having a simple configuration and excellent machining accuracy.

  The processing apparatus according to the present invention includes a slider provided with a processing means for processing a workpiece at a tip and capable of advancing and retreating in one direction, a link member positioned behind the slider, and rotatable with respect to the slider. A rotation shaft that supports the link member; and a contact member that is provided on the link member and restricts the rotation of the link member by contacting the slider, and the link member has a rear end at the link end. A pressing portion that contacts a cam that presses a member toward the processing means is provided, and the link member, the abutting member, and the slider are arranged with their positions aligned in the advancing and retreating direction of the slider. To do.

  According to such a configuration, when the cam contacts the pressing portion of the link member, the load (input load) input from the cam to the pressing portion is transmitted to the slider via the contact member, and the slider moves forward. To do. Since the link member, the contact member, and the slider are arranged with their positions aligned in the forward / backward direction of the slider, for example, the link member and the slider are orthogonal to the forward / backward direction of the slider. As compared with the case where the offset is offset, a bending moment is hardly generated in the link member, the contact member, and the slider. Thereby, it can suppress that the rectilinear advanceability of the said slider falls. Also, since the rigidity of each member is not increased but the position of each member is specified to prevent the straightness of the slider from being lowered, the entire apparatus is not increased in size. Therefore, excellent machining accuracy can be realized with a simple configuration.

  In this case, the link member, the contact member, and the slider may be arranged on a line extending from the center in the width direction of the processing means in the forward / backward direction of the slider.

  Further, the processing means may be arranged in the same position as the contact member in the advancing / retreating direction of the slider. If it does so, the input load of the said press part can be transmitted to the said process means linearly. Thereby, further excellent processing accuracy can be realized.

  Furthermore, the link member has a link main body provided on the rotating shaft and a support shaft provided at a rear end of the link main body, and the pressing portion is provided rotatably on the support shaft. It may be formed as a rotating roller.

  Then, the contact resistance between the cam and the pressing portion can be reduced.

  According to the present invention, since the link member, the contact member, and the slider are arranged with their positions aligned in the advancing / retreating direction of the slider, a bending moment is hardly generated in the link member, the contact member, and the slider. Become. Thereby, the fall of the straightness of the slider is suppressed, and excellent machining accuracy can be realized with a simple configuration.

It is a perspective view of the press molding apparatus with which the processing apparatus which concerns on embodiment of this invention was integrated. It is a top view of the processing apparatus (curl forming apparatus) of FIG. FIG. 2 is a partially omitted perspective view of the processing apparatus (curl forming apparatus) of FIG. 1 as viewed obliquely from the lower rear. It is the flowchart which showed the procedure which winds the edge part of a workpiece | work using the said press molding apparatus. It is a side view which shows the state which hold | maintained the workpiece | work with the pressing pad. It is a side view which shows the state which the downward slope of the cam contacted the rotating roller. It is a side view which shows the state which is performing the curl molding. It is an expanded vertical sectional view which shows the state which is performing the said curl molding. It is a side view which shows the state which is performing seam shaping | molding. It is an expanded vertical sectional view which shows the state which is performing the said seam shaping | molding. It is a side view which shows the state by which the link member was pushed up with the cam.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a press forming apparatus in which a processing apparatus according to the present invention is incorporated will be described in detail with reference to the accompanying drawings by giving preferred embodiments.

  The press molding apparatus according to the present embodiment is an apparatus for performing a winding process on, for example, automobile hoods, trunks, and door edges.

  Specifically, the press molding apparatus curls the edges of two stacked plate members (work pieces) into a substantially circular cross section, and flatly shapes the curled portions of the work pieces. This is an apparatus that performs seam forming in one step (up and down movement of the upper mold).

  As shown in FIG. 1, the press molding apparatus 10 includes an upper mold 12 and a lower mold 14 on which a workpiece W is placed. As the workpiece W, an outer panel 100 and an inner panel 102 made of a metal material punched into a predetermined shape are used. In the following description, the outer panel 100 and the inner panel 102 may be collectively referred to as a workpiece W.

  The upper mold 12 includes an upper mold body 16 that is provided so as to be movable up and down with respect to a base (not shown) installed on the floor of a factory or the like, and a holding mechanism 18 that is provided on the upper mold body 16 and holds the workpiece W. The cam member 20 is fixed to the upper die body 16, and the seam punch 22 is formed between the holding mechanism 18 and the cam member 20 and performs seam forming on the workpiece W.

  The holding mechanism 18 is provided with a support member 24 fixed to the upper mold body 16 and a pressing pad 26 that presses the inner panel 102 downward in a state where the inner panel 102 is stacked on the outer panel 100. A pair of guide members 30 and 30 are provided between the support member 24 and the pressing pad 26 so as to sandwich the spring 28. The support member 24 is formed with insertion holes 32 and 32 through which the pair of guide members 30 and 30 are inserted. As the spring 28, a compression coil spring is used.

  The cam member 20 is provided with a driver cam 34 projecting downward from the lower surface of the upper die main body 16 and a pair of cams 36, 36 provided on the driver cam 34. The cam 36 is formed in a substantially triangular prism shape, and includes an upper slope 36 a located on the upper mold body 16 side and a lower slope 36 b located on the lower mold 14 side.

  The lower mold 14 includes a base 38 installed on the floor surface at a position facing the upper mold main body 16, a mounting table 40 provided on the base 38 on which the workpiece W is mounted, and a backup for guiding the driver cam 34. A curl forming device 44 as a processing device is provided between the mounting table 40 and the backup liner 42. In the following description, the direction in which the mounting table 40 is positioned with respect to the curl forming device 44 may be referred to as the front, and the direction in which the backup liner 42 is positioned may be referred to as the rear.

  The curl forming device 44 is fixed to the base 38 and has a base portion 48 formed with an inclined surface 46 inclined downward, a holder 50 installed on the inclined surface 46 of the base portion 48, and the holder 50. A slider 52 provided to be movable back and forth in the front-rear direction, a curl punch 54 provided at the tip of the slider 52 as a processing means for performing curl forming on the workpiece W, and a link member 56 positioned behind the slider 52 And a rotary shaft 58 that rotatably supports the link member 56 with respect to the slider 52. Although not shown, the holder 50 incorporates an elastic member such as a spring that biases the slider 52 backward.

  As shown in FIGS. 1 and 2, the slider 52 includes a slider main body 60 that serves as a base for the slider 52, and a pair of bulges that diverge from the rear end of the slider main body 60 to the left and right sides and that support the rotating shaft 58. Bearings 62, 62, a protrusion 64 positioned below the bearings 62, 62 and protruding from the rear end of the slider body 60 to the rear of the bearings 62, 62, the bearings 62, 62 and the protrusions 64 And an intermediate portion 66 located between the two. The slider body 60, the bearing portions 62 and 62, the projecting portion 64, and the intermediate portion 66 are integrally formed.

  Further, as understood from FIG. 1, the rear ends of the bearing portions 62, 62 are curved with a curvature substantially equal to the curvature of the rotary shaft 58, and the rear end of the intermediate portion 66 is gently directed toward the rear. Inclined with a downward slope.

  As shown in FIGS. 1 and 2, the link member 56 extends in the front-rear direction and has a link main body 68 fitted into the rotary shaft 58 with the tip positioned between the pair of bearings 62, 62, and the link main body 68. A support shaft 70 fitted to the rear end of the link body 68, and a pair of rotating rollers 72, 72 provided on both sides of the link body 68 so as to be rotatable with respect to the support shaft 70 and capable of contacting the cams 36, 36; including.

  As shown in FIG. 3, an abutting member 74 capable of abutting on the rear end of the protruding portion 64 is fixed to the lower portion of the rear end of the link main body 68. The abutting member 74 abuts against the rear end of the protruding portion 64, so that the downward rotation of the link member 56 is restricted. As can be understood from FIGS. 1 to 3, a line connecting the center of the rotating shaft 58 and the center of the support shaft 70 in a state where the contact member 74 is in contact with the rear end of the protruding portion 64 is a slider. The rotating rollers 72, 72 are opposed to the bearing portions 62, 62 substantially coincide with the advancing / retreating direction of 52. As described above, since the rear end of the intermediate portion 66 is inclined, the rotating rollers 72 and 72 and the slider 52 do not come into contact with each other in this state.

  Further, the link main body 68 is located on the left-right symmetry axis Ax (see FIG. 2) of the slider 52 (slider main body 60). In other words, the link main body 68 and the contact member 74 are arranged on a line extending from the center in the width direction of the curl punch 54 in the forward / backward direction of the slider 52. That is, the link main body 68, the contact member 74, the slider main body 60, and the curl punch 54 are arranged with their positions aligned in the forward / backward direction of the slider 52.

  The pair of rotating rollers 72 and 72 are arranged at line-symmetrical positions with respect to a line (or the left-right symmetric axis Ax) extending from the center in the width direction of the curl punch 54 in the forward / backward direction of the slider 52.

  A procedure for winding and tightening the edge of the workpiece W using the press molding apparatus 10 configured as described above will be described with reference to FIGS.

  As shown in FIG. 5, first, the inner panel 102 is overlaid on the outer panel 100 and installed on the mounting table 40 (step S1 in FIG. 4). At this time, the slider 52 is disposed at the retracted position by being urged rearward by the elastic member (not shown) described above.

  Thereafter, when the upper die main body 16 is lowered (step S2), the pressing pad 26 comes into contact with the upper surface of the inner panel 102, and then the inner panel 102 is pressed downward by the elastic force of the spring 28. As a result, the workpiece W sandwiched between the pressing pad 26 and the mounting table 40 is held (step S3).

  Subsequently, as shown in FIG. 6, when the upper die main body 16 is further lowered, the lower slopes 36 b and 36 b of the cams 36 and 36 come into contact with the rotating rollers 72 and 72. Specifically, the lower slopes 36 b and 36 b of the cam 36 are in contact with portions of the rotating rollers 72 and 72 that are located behind the axis of the support shaft 70. As a result, the rotating rollers 72 and 72 are pressed by the lower inclined surfaces 36b and 36b of the cams 36 and 36, so that a load in the forward direction is input to the rotating rollers 72 and 72. Then, the load input to the rotating rollers 72, 72 is transmitted to the slider body 60 via the support shaft 70, the link body 68, and the contact member 74. As a result, the rotating rollers 72, 72 are moved to the lower inclined surface 36b, While rolling 36b, the slider 52 advances.

  At this time, since the pair of rotating rollers 72 and 72 are arranged at positions symmetrical with respect to the left-right symmetric axis Ax, the couple of the link main body 68 has almost no couple. The resultant force (the resultant force of the input load of each rotary roller 72), that is, the resultant force in the forward direction of the slider 52 acts.

  Further, since the link main body 68, the contact member 74, and the slider main body 60 are arranged with their positions aligned in the advancing and retreating direction of the slider 52, for example, the link main body 68 is set in the advancing direction of the slider 52 with respect to the slider main body 60. Bending moments (couples) are less likely to occur in the link main body 68, the contact member 74, and the slider main body 60 as compared with the case where they are arranged offset in the orthogonal direction. For this reason, a decrease in straightness of the slider 52 is suppressed, and the slider 52 advances linearly without wobbling. In addition, since the reduction | decrease of the rectilinear advance of the slider 52 is suppressed by not specifying the rigidity of each member but specifying the position of each member, the curl shaping | molding apparatus 44 whole is not enlarged.

  Further, since the pressing members that come into contact with the cams 36 and 36 are formed as the rotating rollers 72 and 72, the cams 36 and 36 and the link member 56 are compared with the case where the cam is brought into contact with the rear end of the link body. The contact resistance generated between them can be reduced.

  Then, as shown in FIG. 7, when the slider 52 moves forward, curling is performed on the edge of the workpiece W by the curl punch 54 (step S4). Thereby, the edge part of the workpiece | work W comes to be formed in a cross-sectional substantially circular shape (refer FIG. 8). At this time, the curl punch 54 and the abutting member 74 are arranged in the same direction in the advancing / retreating direction of the slider, so that the input load to the rotary rollers 72, 72 can be transmitted linearly to the curl punch 54. . Therefore, the end portion of the workpiece W can be curled with excellent processing accuracy with a simple configuration.

  Thereafter, when the upper die main body 16 is further lowered, as shown in FIG. 9, the lower inclined surfaces 36b and 36b are separated from the rotating rollers 72 and 72, and the slider 52 is returned to the retracted position. Next, seam molding is performed by the seam punch 22 on the portion of the workpiece W where the curl molding has been performed (step S5). Thereby, the part by which curl shaping | molding was performed among the workpiece | work W is shape | molded flatly (refer FIG. 10). Then, after the seam forming is completed, the lowering of the upper mold main body 16 is stopped (step S6).

  Subsequently, when the upper die body 16 is raised (step S7), as shown in FIG. 11, the upper inclined surfaces 36a, 36a of the cams 36, 36 and the rotary rollers 72, 72 come into contact with each other, and the rotary rollers 72, 72 are brought into contact. A load in the upward direction is input to. Then, the link member 56 rotates integrally with the rotation shaft 58 around the axis of the rotation shaft 58, and the rotation rollers 72 and 72 roll on the upper inclined surfaces 36a and 36a. Accordingly, the cams 36 and 36 can be positioned above the rotating rollers 72 and 72 without the slider 52 moving forward by the action of the cams 36 and 36.

  Further, when the upper die body 16 is raised, the pressing pad 26 is separated from the workpiece W, and the holding of the workpiece W is released (step S8). Thereafter, the workpiece W is removed from the mounting table 40 (step S9). At this stage, the procedure for winding the workpiece W according to this embodiment is completed.

  The processing apparatus which concerns on this invention is not limited to said embodiment, It can implement with a various form. For example, the processing apparatus according to the present invention may be configured to perform cam piercing molding as shown in the above-mentioned JP-A-10-314856, not curl molding.

  In this case, the processing apparatus is configured such that when the upper die body is lowered, the link member is rotated to retract the slider, and when the upper die body is raised, the link member is prevented from rotating and the slider is advanced. You can do it. Specifically, a thrust receiver is provided on the upper portion of the slider body, and a contact member that contacts the thrust receiver is disposed on the upper portion of the link body, and the link body, the contact member, the thrust receiver, the slider body, The curl punch may be arranged with its position aligned in the forward / backward direction of the slider.

  In the above embodiment, the curl forming device may be configured such that the rotating roller and the support shaft are omitted, and the cam is brought into contact with the left-right symmetrical axis of the rear end of the link body.

DESCRIPTION OF SYMBOLS 10 ... Press molding apparatus 12 ... Upper mold 14 ... Lower mold 16 ... Upper mold main body 36 ... Cam 44 ... Curl molding apparatus (processing apparatus)
52 ... Slider 54 ... Curl punch 56 ... Link member 58 ... Rotating shaft 60 ... Slider body 68 ... Link body 72 ... Rotating roller

Claims (3)

A slider provided with a processing means for processing a workpiece and capable of moving back and forth in one direction;
A link member located behind the slider;
A rotating shaft that supports the link member rotatably with respect to the slider;
A contact member that is provided on the link member and restricts rotation of the link member by contacting the slider;
The rear end of the link member is provided with a pressing portion that comes into contact with a cam that presses the link member toward the processing means.
The processing apparatus according to claim 1, wherein the link member, the contact member, and the slider are arranged with their positions aligned in the advancing and retreating direction of the slider. The processing apparatus according to claim 1,
The processing device, wherein the processing means is arranged in the same direction as the contact member in the advancing / retreating direction of the slider. The processing apparatus according to claim 1 or 2,
The link member includes a link body provided on the rotation shaft,
A support shaft provided at the rear end of the link body;
The pressing device is formed as a rotating roller rotatably provided on the support shaft.

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