Cam mechanism

Abstract

The present invention provides a unitized cam device for a press die drilling apparatus, which is installed between a fixed lower die and a moving upper die. [Solution] The cam device includes a cam holder 100 attached to a press die, a cam slider 200 slidably positioned on the cam holder, and a cam driver 300 that drives the cam slider in the machining direction. By standardizing the dimensions of the cam device, such as the external dimensions, mounting surface dimensions, machining angle, cam angle, and stroke amount, to a predetermined range, stable strength and machining accuracy are ensured even in a compact cam device. In recent years, there has been a demand for more compact cam devices, but this has led to the problem that the machining load is concentrated in a limited area due to the miniaturization, making it difficult to ensure strength and machining accuracy.

Description

Technical Field

[0004] , , , , ,

[0001] This utility model relates to a hole - punching device for automotive press dies, and particularly to a unitized cam device installed between a fixed lower die and a movable upper die.

Background Art

[0002] A cam device for press dies is a mechanical mechanism that converts a vertical force into a horizontal or inclined force to achieve a predetermined processing and operating function, and is widely used in the field of automotive press dies. In particular, it is used when press - forming metal panels such as automotive bodies with a fixed lower die and a movable upper die. At the same time as press - forming, hole - punching (punching) or flange processing can be performed on the side surface of the molded product by a cam device incorporated in the die. With the development of automotive production technology, automotive manufacturers are raising the requirements for the processing locations of various press - die metal panels. The existing cam device, which is one of the core components of the press die, can no longer meet the technical requirements of the entire die, and rapid improvement is required.

[0003] In order to meet the increasing requirements for die performance by automotive manufacturers, in recent years, there has been a strong demand for the compactification of cam devices. However, when the cam device is miniaturized, the processing load borne by the device is concentrated on a limited area, making it difficult to ensure strength and maintain processing accuracy. Furthermore, as the outer dimensions of the device become smaller, the design margins of each dimensional element such as the mounting surface dimensions, processing angle, cam angle, and stroke amount are significantly reduced. Therefore, in order to ensure the required processing performance, it is essential to standardize each dimension within an appropriate range.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, the cam device described in Patent Document 1 does not offer any suggestions for miniaturizing the overall length of the cam or standardizing the dimensions of the cam device.

[0006] The purpose of this invention is to provide a new cam device for press dies that solves the above-mentioned problems. [Means for solving the problem]

[0007] The cam device according to the present invention comprises a cam holder, a cam slider slidably disposed on the cam holder, and a cam driver for driving the cam slider in the machining direction. Below the cam holder are a first sliding surface and a second sliding surface, with a step between them. Above the cam slider are a first sliding surface that slides against the first sliding surface and a second sliding surface that slides against the second sliding surface, with a step between them. The cam device is characterized in that the width of the cam slider is 46 mm or more and 50 mm or less, the height of the cam device is 135 mm, and the length range of the cam holder mounting surface is 96 mm or more and 105 mm or less.

[0008] The maximum allowable processing force for the cam device according to this invention is 1.5 tonf, the cam angle is between 0° and 50°, the cam angle θ2 range is between 0° and 50°, the extrusion stroke range is between 15.1 mm and 36.6 mm, the spring stroke is 23.5 mm, and the press stroke range is between 18 mm and 28 mm.

[0009] The mounting hole arrangement of the cam holder in the cam device according to the present invention is as follows: the distance in the left-right direction between the center point of the first counterbore hole and the center point of the second counterbore hole is 30 mm; the distance in the left-right direction between the center point of the third counterbore hole and the center point of the fourth counterbore hole is 30 mm; the range of the distance in the front-rear direction between the center point of the first counterbore hole and the center point of the third counterbore hole is 63 mm or more and 84 mm or less; the range of the distance in the front-rear direction between the center point of the second counterbore hole and the center point of the fourth counterbore hole is 63 mm or more and 84 mm or less; the distance from the rear end of the cam holder mounting surface to the center points of the first and second counterbore holes is 10 mm or more and 33 mm or less; the distance in the left-right direction between the center point of the first knock hole and the center point of the second knock hole is 32 mm; and the distance from the rear end of the cam holder mounting surface to the center points of the first and second knock holes is 47 mm or more and 56 mm or less.

[0010] The mounting hole arrangement for the cam driver of the cam device according to the present invention is as follows: the distance in the left-right direction between the center point of the first counterbore hole and the center point of the second counterbore hole is 26 mm; the distance in the front-rear direction between the center points of the first and second counterbore holes and the center point of the third counterbore hole is 66 mm; the distance from the rear end of the cam driver mounting surface to the center points of the first and second counterbore holes is 9 mm; the distance in the front-rear direction between the center point of the first knock hole and the center point of the second knock hole is 49 mm; and the distance from the rear end of the cam driver mounting surface to the center point of the first knock hole is 12 mm. [Effects of the Invention]

[0011] According to the cam device of this invention, the main dimensions of the cam device, such as the external dimensions, mounting surface dimensions, machining angle, and stroke amount, can be standardized within a predetermined range. As a result, even when the cam device is made more compact, the interrelationship between the external dimensions, mounting surface dimensions, machining angle, and stroke amount is appropriately maintained, making it possible to distribute the machining load across various parts of the device. This suppresses localized load concentration in a limited device area, ensuring the necessary strength and machining accuracy in a stable manner. Furthermore, by setting each dimensional element within an appropriate range, the operating conditions of the cam mechanism are stabilized, preventing variations in machining angles and insufficient stroke, thus enabling the stable achievement of the desired machining performance. Furthermore, standardizing the dimensional system makes it easier to set dimensions during mold design, thereby improving the efficiency of the design work and preventing a decrease in processing quality due to assembly errors. [Brief explanation of the drawing]

[0012] [Figure 1] This is an exploded perspective view of the cam device of this embodiment. [Figure 2] This is a diagram of the cam holder according to this embodiment. [Figure 3] This is a diagram of the cam slider according to this embodiment. [Figure 4] This diagram shows the movement of the cam device of this embodiment during machining. [Figure 5] This diagram shows the forces acting on the cam mechanism of this embodiment. [Figure 6] This is a cam diagram of this embodiment. [Figure 7] This is a dimensional symbol diagram of this embodiment. [Figure 8] This is a perspective view of the cam device of this embodiment with a width of 46 mm and a machining angle of 0°. [Modes for carrying out the invention]

[0013] Specific embodiments of this application will be described below with reference to the drawings and examples. Those skilled in the art will be able to clearly and fully understand the technical solution, the technical problem to be solved, and the technical effects to be achieved by this specification. The specific embodiments described herein are for illustrative purposes only and are not intended to be limiting. Furthermore, for the sake of clarity, the drawings show only those relevant to this application.

[0014] Note that the structures, ratios, dimensions, etc. shown in the drawings of the specification are only for supplementing and explaining the content described in this specification to assist those skilled in the art in understanding and reading, and are not intended to limit the implementation conditions of this application. Therefore, they do not have a technical essential meaning. Any structural modification, change in ratio relationship, or adjustment of dimensions, as long as it does not affect the effects achieved by this application and the objectives to be achieved, shall be construed as being included within the scope of the technical content disclosed in this application.

[0015] Also, terms such as "first", "second", "the", etc. do not mean quantitative limitations and can be used for either singular or plural. The terms "include", "comprise", "have" and their derivatives in this application intend non-exclusive inclusion. That is, a process, method, system, product, or device that includes a certain procedure or module is not limited to the listed procedures or elements, and may further include unlisted procedures or elements, or other procedures or elements inherent in the process, method, product, or device. Furthermore, terms such as "connect", "couple", "join", etc. are not limited to physical or mechanical connections, and also include direct or indirect electrical connections.

[0016] FIG. 1 is an exploded perspective view of a cam device 1 according to this embodiment. As shown in FIG. 1, the cam device 1 includes a cam holder 100 fixed to a moving die (not shown) of a press die that reciprocates in the press direction (direction of P in FIG. 6), a guide bar 102 suspended and held by the cam holder 100, a cam slider 200 through which the guide bar 102 is inserted and slidably supported, biased in the return direction by a gas spring 205 or a coil spring 206, reciprocating in the processing direction (direction of F in FIG. 5) with a predetermined stroke, and a processing tool (not shown) is attached to a processing tool attachment surface 201f, and a cam driver 300 fixed to a fixed die (not shown) and driving the cam slider 200 in a predetermined processing direction.

[0017] FIG. 2 is a perspective view of the cam holder 100 as seen from two directions. The cam holder 100 has a cam holder body 101, a guide bar 102, and a plate 103. The cam holder body 101 has a guide bar first support portion 101a, a guide bar second support portion 101b, a cam holder first sliding surface 101c, a cam holder second sliding surface 101d, and a groove portion 101e.

[0018] The cam holder body 101 is a member made of a metal material and is mainly formed of cast iron. The cam holder body 101 is a substantially U-shaped member and has a guide bar first support portion 101a integrally formed at the forward end portion (hereinafter referred to as the front end) of the cam holder 100, a guide bar second support portion 101b formed at the rearward end portion (hereinafter referred to as the rear end) of the cam holder 100, a guide bar 102 attached to the lower central portion of the cam holder body 101, and a groove portion 101e which is a space for the cam slider 200 to slide.

[0019] On the upper surface of the cam holder body 101, there are an attachment surface 101f for attaching to a press die (upper die) and attachment holes. The attachment holes include a counterboring hole and a knock hole. The counterboring hole is for inserting a bolt for fixing the cam device to the press die and has a counterboring shape. The knock hole is for inserting a knock pin for determining the attachment position to the press die. The cam holder 100 is fixed to the press die (upper die) through these attachment holes. When defining the direction connecting the front end side and the rear end side of the cam holder 100 as the front-rear direction and the direction orthogonal to the front-rear direction as the left-right direction, the first counterboring hole is arranged near the left rear corner of the cam holder attachment surface 101f, the second counterboring hole is arranged near the right rear corner, the third counterboring hole is arranged near the left front corner, and the fourth counterboring hole is arranged near the right front corner. The first knock hole is arranged near the central left end in the front-rear direction, and the second knock hole is arranged near the central right end in the front-rear direction.

[0020] The guide bar first support portion 101a has an attachment hole for assembling the guide bar 102. The guide bar first support portion 101a is integral with the cam holder body 101.

[0021] The second guide bar support portion 101b has a mounting hole for assembling the guide bar 102. The second guide bar support portion 101b is integrated with the cam holder body 101. The second guide bar support portion 101b may also have a second cam holder sliding surface 101d at its lower part. In this case, the second cam holder sliding surface 101d has a step difference with the first cam holder sliding surface 101c and is formed as a surface parallel to the first cam holder sliding surface 101c, and the step difference in this case is the same as the step difference between the first cam slider sliding surface 201a and the second cam slider sliding surface 201b, which will be described later. A solid lubricant may be embedded in the second cam holder sliding surface 101d.

[0022] The groove 101e is a groove-shaped portion formed by the lower surface of the cam holder body 101, the side surface of the first guide bar support portion 101a, and the side surface of the second guide bar support portion 101b. The groove 101e has a first sliding surface 101c of the cam holder on its lower surface. That is, the cam holder 100 has a first guide bar support portion 101a on one end of the first sliding surface 101c of the cam holder, and a second guide bar support portion 101b on the other end. The guide bar 102 is fixed between the side surface of the first guide bar support portion 101a and the side surface of the second guide bar support portion 101b within the groove 101e. Within the groove 101e, the stepped portion B of the cam slider 200 fits, and the first sliding surface 101c of the cam holder and the first sliding surface 201a of the cam slider, which will be described later, slide against each other in a back-and-forth motion.

[0023] The guide bar 102 is a component made of metal. The guide bar 102 is a rod-shaped component with a round, elliptical, or polygonal cross-section. The guide bar 102 is inserted through the guide bar insertion hole 201d, which will be described later, with one end inserted through the mounting hole of the first guide bar support part 101a and the other end inserted through the mounting hole of the second guide bar support part 102b, and fixed with the plate 103. The guide bar 102 guides the movement of the cam slider 200 in the front-rear direction and is a component that suspends the cam slider 200 to prevent it from falling.

[0024] Plate 103 is a component made of metal. Plate 103 has a roughly rectangular shape. Plate 103 is a mounting member for the rear of the guide bar second support portion 101b.

[0025] Figure 3 is a perspective view of the cam slider 200 from two directions. The cam slider 200 includes a cam slider body 201, a guide bush 202, a urethane stopper 203, a forced return plate 204, and a gas spring 205 or a coil spring 206. The cam slider body 201 has a first sliding surface 201a, a second sliding surface 201b, a third sliding surface 201c, a guide bar insertion hole 201d, an elastic body mounting hole 201e, and a machining tool mounting surface 201f.

[0026] The cam slider body 201 is a metal component, mainly made of cast iron. It has a stepped portion B at its upper end, and the cam slider first sliding surface 201a is located on the cam holder side of the stepped portion B. The cam slider first sliding surface 201a is the surface that slides (sliding contact) with the cam holder first sliding surface 101c. The stepped portion B of the cam slider body 201 has a guide bar insertion hole 201d that penetrates from the upper front end. The guide bar 102 passes through the guide bar insertion hole 201d. Below the guide bar insertion hole 201d, the cam slider body 201 has an elastic body mounting hole 201e. A gas spring 205, a coil spring 206, or a urethane spring (not shown) is assembled into the elastic body mounting hole 201e.

[0027] The cam slider body 201 is formed at a position with a step difference from the cam slider first sliding surface 201a and has a cam slider second sliding surface 201b that is parallel to the cam slider first sliding surface 201a.

[0028] The cam slider 200 has a notch A formed by a notch (the space above the second sliding surface 201b of the cam slider) provided on the guide bar second support portion 101b side of the upper stepped portion B. The notch A is a notch provided on the upper part of the cam slider body 201. When the cam device 1 is in operation (when the cam slider 200 moves forward), the guide bar second support portion 101b of the notch A moves relatively backward (away from the stepped portion B). When the cam slider 200 moves backward, the guide bar second support portion 101b of the notch A moves relatively forward (closer to the stepped portion B). In this way, when the cam slider 200 is driven, the guide bar second support portion 101b moves relatively back and forth within the notch A (closer to and away from the stepped portion B). When the second sliding surface 101d of the cam holder and the second sliding surface 201b of the cam slider are in sliding contact, the second sliding surface 101d of the cam holder moves back and forth in the notch A and comes into contact with the second sliding surface 201b of the cam slider.

[0029] The guide bush 202 is a metal component, mainly made of a copper alloy. The guide bush 202 is a cylindrical component. The guide bush 202 is assembled into the guide bar insertion hole 201d. The guide bush 202 slides against the guide bar 102 and is a component that prevents seizing.

[0030] The gas spring 205 is a component made of metal. The gas spring 205 comprises a cylindrical cylinder body and a piston rod extending axially from one end thereof. The gas spring 205 is used as a return elastic member to allow the cam slider 200 to return to its original position after machining the workpiece, using high-pressure gas (e.g., nitrogen) sealed inside the cylinder body. The coil spring 206 is a component made of metal. The coil spring 206 has a helical shape. The coil spring 206 elastically deforms in response to the load, generating a restoring force, and is used as a return elastic member to allow the cam slider 200 to return to its original position after machining the workpiece.

[0031] The return elastic member contacts the inner wall of the cam holder body 101 at the corresponding position. Depending on the operation of the cam device 1, the return elastic member can be selected as either a gas spring 205 or a coil spring 206. When the cam holder 100 rises, the cam slider 200 returns to its initial position due to the repulsive force of the return elastic member.

[0032] The urethane stopper 203 is a component made of urethane. The urethane stopper 203 is assembled to the rear of the cam slider body 201. The urethane stopper 203 mitigates the impact force when the cam slider 200 returns to its initial position and comes into contact with the cam holder 100.

[0033] The cam slider body 201 has a forced return plate 204 on one or both sides. The forced return plate 204 is a component made of metal. The forced return plate 204 has a roughly rectangular shape. The forced return plate 204 is a component that physically returns the cam slider 200 when the tool gets stuck to the panel and the cam slider 200 does not return when the cam device 1 is in operation.

[0034] The cam driver 300 has a cam driver body 301. The cam driver body 301 is a component made of metal, mainly cast iron. The cam driver body 301 has a cam driver sliding surface 301a on its upper surface. The cam driver sliding surface 301a slides (slids in contact with) the cam slider third sliding surface 201c. The cam driver 300 is a component that guides the cam slider 200 in the machining direction.

[0035] The bottom surface of the cam driver body 301 has a mounting surface 301b and mounting holes for attachment to a press die (lower die). The mounting holes include counterbore holes and knock holes. The counterbore holes are counterbore-shaped through which bolts that fix the cam device to the press die are inserted. The knock holes are through which knock pins that determine the mounting position on the press die are inserted. The cam driver 300 is fixed to the press die (lower die) via these mounting holes. When the machining direction of the cam device 1 is defined as the forward direction, the direction connecting the front and rear ends of the cam driver 300 is defined as the front-rear direction, and the direction perpendicular to the front-rear direction is defined as the left-right direction, the mounting hole positions on the mounting surface 301b are arranged as follows: the first counterbore hole is near the left rear corner of the mounting surface 301b, the second counterbore hole is near the right rear corner, the third counterbore hole is near the center rear end in the left-right direction, the first knock hole is at the center rear in the left-right direction, and the second knock hole is at the center front in the left-right direction.

[0036] Figure 4 shows the movement of the cam device 1 of this embodiment during machining. Figure 4(a) shows the state of the cam device 1 when the upper die is at the top dead center position (cam slider retracted position, hereinafter simply referred to as the retracted position), and Figure 4(b) shows the state of the cam device 1 when the upper die is at the bottom dead center position (cam slider advanced position, hereinafter simply referred to as the advanced position).

[0037] During the operation of the cam device 1, the cam holder 100 and the cam slider 200 move downward together with the upper die (not shown) of the mold. The third sliding surface 201c of the cam slider 200, located at the bottom of the cam slider 200, comes into contact with the cam driver sliding surface 301a, located at the top of the cam driver 300. Subsequently, the cam slider 200 moves along the cam driver sliding surface 301a in the machining direction (from the retracted position to the forward position). Further downward movement of the upper die causes the machining tool (not shown) attached to the tool mounting surface 201f of the cam slider 200 to move in the machining direction (from the retracted position to the forward position) to perform drilling or bending operations on the workpiece (not shown) placed in the mold (position shown in Figure 4(b)).

[0038] After machining, the cam slider 200 moves along the sliding surface (from the forward position to the retracted position) as the upper die moves upward, and returns to its original retracted position before machining as the upper die moves further (position shown in Figure 4(a)).

[0039] Figure 5 shows the forces acting on the cam device 1 of this embodiment. The machining angle θ1 in the figure is the angle that the cam driver sliding surface 301a makes with the horizontal plane (a plane perpendicular to the operating direction of the press die; the same applies hereinafter), and the cam angle θ2 in the figure is the angle that the cam holder first sliding surface 101c makes with the horizontal plane. The machining force F in the figure is the force generated when the cam slider 200 moves forward as the upper die descends, protrudes, and punches out the steel plate with a piercing (not shown) attached to its tip.

[0040] In the figure, the press force P is the force applied to the cam device 1 by the descent of the upper die. The component force V in the figure is the vertical component force between the third sliding surface 201c of the cam slider and the sliding surface 301a of the cam driver due to the processing force F. The component force Q1 in the figure is the vertical component force between the first sliding surface 201a of the cam slider and the first sliding surface 101c of the cam holder due to the processing force F. The component force Q2 in the figure is the vertical component force between the second sliding surface 201b of the cam slider and the second sliding surface 101d of the cam holder. In the figure, S is the extrusion stroke of the cam slider 200 in the processing direction. In the figure, S' is the spring stroke of the cam slider 200 relative to the cam holder 100, and is the width returned by a gas spring or spring (not shown). In the figure, L is the press stroke of the upper die (not shown) from top dead center to bottom dead center.

[0041] Figure 5 shows the state where the upper die (not shown) has descended by L in the vertical direction (press direction) from the top dead center, and the cam slider 200 has moved by S in the machining direction. At this time, a force P is applied to the cam holder 100 due to the descent of the upper die (not shown). The cam holder 100 pushes the cam slider 200 with a force Q1 in a direction perpendicular to the cam holder's first sliding surface 101c (cam slider's first sliding surface 201a). The cam holder 100 pushes the cam slider 200 with a force Q2 in a direction perpendicular to the cam slider's second sliding surface 201b (cam holder's second sliding surface 101d). A force V is applied to the cam driver 300 in a direction perpendicular to the cam driver sliding surface 301a (cam slider's third sliding surface 201c). A force F pushes out a tool such as a piercing (not shown) in a direction parallel to the cam driver sliding surface 301a (cam slider third sliding surface 201c).

[0042] Furthermore, the relationship between these forces is defined as follows. The relationship between the pressing force P and the processing force F is: P = F·(cosθ² / sin(θ1+θ²)) The component force acting on the first sliding surface 201a of the cam slider (first sliding surface 101c of the cam holder) and the second sliding surface 201b of the cam slider (second sliding surface 101d of the cam holder) (hereinafter referred to as the cam holder side component force) (Q1 + Q2) is, (Q1+Q2)=F·(1 / sin(θ1+θ2)) The component force V acting on the cam driver sliding surface 301a (cam slider third sliding surface 201c) (hereinafter referred to as the cam driver side component force) is: V = F·(1 / tan(θ1+θ2)) The press stroke L is, L = S·(sin(θ1+θ2) / cosθ2) The spring stroke S' is, S' = S·cosθ1 / cosθ2 This is shown.

[0043] Figure 6 is a cam diagram of this embodiment. The press die designer selects a cam device suitable for panel processing based on the thickness and tensile strength of the panel to be processed. At this time, the processing angle and stroke amount are the main criteria, and the type of cam device is determined while referring to the cam diagram shown in Figure 6.

[0044] Figure 7 shows the dimensional relationship of the cam device 1 in this embodiment. The height of the cam device is denoted by H, the length of the cam holder mounting surface by N, and the width of the cam slider by W.

[0045] The dimensions of the mounting holes provided on the cam holder mounting surface 101f are as follows: HT1 is the front-to-back distance between the center points of the first and second counterbore holes and the center points of the third and fourth counterbore holes; HT2 is the left-to-right distance between the center points of the first and third counterbore holes and the center points of the second and fourth counterbore holes; HT3 is the front-to-back distance from the rear end of the cam holder 100 to the center points of the first and second counterbore holes; HK1 is the front-to-back distance from the rear end of the cam holder 100 to the center points of the first and second knock holes; and HK2 is the left-to-right distance between the center point of the first knock hole and the center point of the second knock hole.

[0046] The dimensions of the mounting holes provided on the cam driver mounting surface 301b are as follows: DT1 is the front-to-back distance between the center points of the first and second counterbore holes and the center point of the third counterbore hole; DT2 is the left-to-right distance between the center points of the first and second counterbore holes; DT3 is the front-to-back distance from the rear end of the cam driver 300 to the center points of the first and second counterbore holes; DK1 is the front-to-back distance between the center points of the first knock hole and the center points of the second knock hole; and DK2 is the front-to-back distance from the rear end of the cam driver 300 to the center point of the first knock hole. [Examples]

[0047] Table 1 shows the dimensions of the cam slider in the embodiment: width W, height H of the cam device, length N of the cam holder mounting surface, required machining force F, extrusion stroke S, spring stroke S', press stroke L, machining angle θ1, and cam angle θ2.

[0048] Example 1 shows the relationship when the cam slider width is 46 mm, the cam device height is 135 mm, the cam holder mounting surface length is 96 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 15.1 mm, the spring stroke is 23.5 mm, the press stroke is 18 mm, the machining angle is 0°, and the cam angle is 50°.

[0049] Example 2 shows the relationship when the cam slider width is 46 mm, the cam device height is 135 mm, the cam holder mounting surface length is 98 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 16.7 mm, the spring stroke is 23.5 mm, the press stroke is 18.1 mm, the machining angle is 5°, and the cam angle is 45°.

[0050] Example 3 shows the relationship when the cam slider width is 46 mm, the cam device height is 135 mm, the cam holder mounting surface length is 100 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 18.3 mm, the spring stroke is 23.5 mm, the press stroke is 18.3 mm, the machining angle is 10°, and the cam angle is 40°.

[0051] Example 4 shows the relationship when the cam slider width is 46 mm, the cam device height is 135 mm, the cam holder mounting surface length is 101 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 19.9 mm, the spring stroke is 23.5 mm, the press stroke is 18.6 mm, the machining angle is 15°, and the cam angle is 35°.

[0052] Example 5 shows the relationship when the cam slider width is 46 mm, the cam device height is 135 mm, the cam holder mounting surface length is 103 mm, the cam machining force is 1.5 tonf, the extrusion stroke is 21.7 mm, the spring stroke is 23.5 mm, the press stroke is 19.2 mm, the machining angle is 20°, and the cam angle is 30°.

[0053] Example 6 shows the relationship when the cam slider width is 46 mm, the cam device height is 135 mm, the cam holder mounting surface length is 104 mm, the cam machining force is 1.5 tonf, the extrusion stroke is 23.5 mm, the spring stroke is 23.5 mm, the press stroke is 19.9 mm, the machining angle is 25°, and the cam angle is 25°.

[0054] Example 7 shows the relationship when the cam slider width is 46 mm, the cam device height is 135 mm, the cam holder mounting surface length is 105 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 25.5 mm, the spring stroke is 23.5 mm, the press stroke is 20.8 mm, the machining angle is 30°, and the cam angle is 20°.

[0055] Example 8 shows the relationship when the cam slider width is 46 mm, the cam device height is 135 mm, the cam holder mounting surface length is 105 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 27.7 mm, the spring stroke is 23.5 mm, the press stroke is 22 mm, the machining angle is 35°, and the cam angle is 15°.

[0056] Example 9 shows the relationship when the cam slider width is 46 mm, the cam device height is 135 mm, the cam holder mounting surface length is 105 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 30.2 mm, the spring stroke is 23.5 mm, the press stroke is 23.5 mm, the machining angle is 40°, and the cam angle is 10°.

[0057] Example 10 shows the relationship when the cam slider width is 46 mm, the cam device height is 135 mm, the cam holder mounting surface length is 104 mm, the cam machining force is 1.5 tonf, the extrusion stroke is 33.1 mm, the spring stroke is 23.5 mm, the press stroke is 25.5 mm, the machining angle is 45°, and the cam angle is 5°.

[0058] Example 11 shows the relationship when the cam slider width is 46 mm, the cam device height is 135 mm, the cam holder mounting surface length is 103 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 36.6 mm, the spring stroke is 23.5 mm, the press stroke is 28 mm, the machining angle is 50°, and the cam angle is 0°.

[0059] Example 12 shows the relationship when the cam slider width is 50 mm, the cam device height is 135 mm, the cam holder mounting surface length is 96 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 15.1 mm, the spring stroke is 23.5 mm, the press stroke is 18 mm, the machining angle is 0°, and the cam angle is 50°.

[0060] Example 13 shows the relationship when the cam slider width is 50 mm, the cam device height is 135 mm, the cam holder mounting surface length is 98 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 16.7 mm, the spring stroke is 23.5 mm, the press stroke is 18.1 mm, the machining angle is 5°, and the cam angle is 45°.

[0061] Example 14 shows the relationship when the cam slider width is 50 mm, the cam device height is 135 mm, the cam holder mounting surface length is 100 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 18.3 mm, the spring stroke is 23.5 mm, the press stroke is 18.3 mm, the machining angle is 10°, and the cam angle is 40°.

[0062] Example 15 shows the relationship when the cam slider width is 50 mm, the cam device height is 135 mm, the cam holder mounting surface length is 101 mm, the cam machining force is 1.5 tonf, the extrusion stroke is 19.9 mm, the spring stroke is 23.5 mm, the press stroke is 18.6 mm, the machining angle is 15°, and the cam angle is 35°.

[0063] Example 16 shows the relationship when the cam slider width is 50 mm, the cam device height is 135 mm, the cam holder mounting surface length is 103 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 21.7 mm, the spring stroke is 23.5 mm, the press stroke is 19.2 mm, the machining angle is 20°, and the cam angle is 30°.

[0064] Example 17 shows the relationship when the cam slider width is 50 mm, the cam device height is 135 mm, the cam holder mounting surface length is 104 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 23.5 mm, the spring stroke is 23.5 mm, the press stroke is 19.9 mm, the machining angle is 25°, and the cam angle is 25°.

[0065] Example 18 shows the relationship when the cam slider width is 50 mm, the cam device height is 135 mm, the cam holder mounting surface length is 105 mm, the cam machining force is 1.5 tonf, the extrusion stroke is 25.5 mm, the spring stroke is 23.5 mm, the press stroke is 20.8 mm, the machining angle is 30°, and the cam angle is 20°.

[0066] Example 19 shows the relationship when the cam slider width is 50 mm, the cam device height is 135 mm, the cam holder mounting surface length is 105 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 27.7 mm, the spring stroke is 23.5 mm, the press stroke is 22 mm, the machining angle is 35°, and the cam angle is 15°.

[0067] Example 20 shows the relationship when the cam slider width is 50 mm, the cam device height is 135 mm, the cam holder mounting surface length is 105 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 30.2 mm, the spring stroke is 23.5 mm, the press stroke is 23.5 mm, the machining angle is 40°, and the cam angle is 10°.

[0068] Example 21 shows the relationship when the cam slider width is 50 mm, the cam device height is 135 mm, the cam holder mounting surface length is 104 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 33.1 mm, the spring stroke is 23.5 mm, the press stroke is 25.5 mm, the machining angle is 45°, and the cam angle is 5°.

[0069] Example 22 shows the relationship when the cam slider width is 50 mm, the cam device height is 135 mm, the cam holder mounting surface length is 103 mm, the cam machining force required is 1.5 tonf, the extrusion stroke is 36.6 mm, the spring stroke is 23.5 mm, the press stroke is 28 mm, the machining angle is 50°, and the cam angle is 0°.

[0070] [Table 1]

[0071] Table 2 shows the mounting hole dimensions for the cam holder mounting surface and the cam driver mounting surface in Examples 1 to 22.

[0072] [Table 2] [Industrial applicability]

[0073] The cam mechanism according to this invention can be applied to press molding dies in various industrial fields, not just the automotive sector, and can be used as a die unit for processing metal sheet materials. [Explanation of symbols]

[0074] 1: Cam mechanism 100: Cam holder 101: Cam holder body 101a: Guide bar first support part 101b: Guide bar second support section 101c: Cam holder first sliding surface 101d: Cam holder second sliding surface 101e: Groove 101f: Cam holder mounting surface 102: Guide bar 103: Plate 200: Cam slider 201: Cam slider body 201a: Cam slider first sliding surface 201b: Cam slider second sliding surface 201c: Cam slider third sliding surface 201d: Guide bar insertion hole 201e: Elastic body mounting hole 201f: Mounting surface for machining tools 202: Guide bush 203: Urethane stopper 204: Force return plate 205: Gas spring 206: Coil spring 300: Cam Driver 301: Cam driver body 301a: Cam driver sliding surface 301b: Cam driver mounting surface A: Notch B: Step part θ1: Machining angle θ2: Cam angle

Claims

1. A cam device comprising a cam holder, a cam slider slidably disposed on the cam holder, and a cam driver for driving the cam slider in the machining direction, wherein the cam holder is provided with a first sliding surface and a second sliding surface below it, the first and second sliding surfaces forming a step, and the cam slider is provided with a first sliding surface that slides with the first sliding surface and a second sliding surface that slides with the second sliding surface above it, the first and second sliding surfaces forming a step, wherein the width of the cam slider is 46 mm or more and 50 mm or less, the height of the cam device is 135 mm, and the length range of the cam holder mounting surface is 96 mm or more and 105 mm or less.

2. The cam device according to claim 1, wherein the maximum allowable processing force of the cam device is 1.5 tonf, the processing angle θ1 range is 0° to 50°, the cam angle θ2 range is 0° to 50°, the extrusion stroke range is 15.1 mm to 36.6 mm, the spring stroke is 23.5 mm, and the press stroke range is 18 mm to 28 mm.

3. The cam device according to claim 1 or 2, wherein the mounting hole arrangement of the cam holder is such that the distance in the left-right direction between the center point of the first counterbore hole and the center point of the second counterbore hole is 30 mm, the distance in the left-right direction between the center point of the third counterbore hole and the center point of the fourth counterbore hole is 30 mm, the range of the distance in the front-rear direction between the center point of the first counterbore hole and the center point of the third counterbore hole is 63 mm or more and 84 mm or less, the range of the distance in the front-rear direction between the center point of the second counterbore hole and the center point of the fourth counterbore hole is 63 mm or more and 84 mm or less, the distance from the rear end of the cam holder mounting surface to the center points of the first and second counterbore holes is 10 mm or more and 33 mm or less, the distance in the left-right direction between the center point of the first knock hole and the center point of the second knock hole is 32 mm, and the distance from the rear end of the cam holder mounting surface to the center points of the first and second knock holes is 47 mm or more and 56 mm or less.

4. The cam device according to claim 1 or 2, wherein the mounting hole arrangement of the cam driver is such that the distance in the left-right direction between the center point of the first counterbore hole and the center point of the second counterbore hole is 26 mm, the distance in the front-rear direction between the center points of the first and second counterbore holes and the center point of the third counterbore hole is 66 mm, the distance from the rear end of the cam driver mounting surface to the center points of the first and second counterbore holes is 9 mm, the distance in the front-rear direction between the center point of the first knock hole and the center point of the second knock hole is 49 mm, and the distance from the rear end of the cam driver mounting surface to the center point of the first knock hole is 12 mm.

Images