JP2001286950A - Cam unit for press working - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily provide a cam unit for press working securing a working accuracy. SOLUTION: The cam unit is provided with an unit block 2 having a circular arc guide face 16A, a circular arc cam 12 which has a circular arc sliding face 1A sliding on the guide face 16A and having the same radius of curvature thereof and has abutting faces 1B, 1C at both ends of a sliding direction in the direction roughly orthogonal to the sliding direction, a pressing pin 4 which is supported by the unit block 2 in the direction roughly orthogonal to the abutting face 1B of the circular arc cam 1 freely slidably, is slid by pressing one end and slides the circular arc cam 1 by pressing the abutting face 1B of the circular arc cam 1 with the other end, a working pin 5 which is supported by the unit block 2 in the direction roughly orthogonal to the abutting face 1C of the circular arc cam 1 freely slidably, while a working tool is fitted to one end, is slid by pressing the other end to the abutting face 1C of the circular arc cam 1 and applies a prescribed working to a work with the working tool.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cam unit for press working for working a work by operating a working tool in a direction different from a direction in which a load is applied.

[0002]

2. Description of the Related Art Conventionally, for example, when a workpiece is drilled from a lateral direction by using a press device, a laterally oriented processing tool is operated by a pressing load of a press machine acting vertically. A cam unit for press working using a cam structure is used. FIG. 8 is a sectional view showing a conventional cam unit for press working. The press working cam unit 100 includes a unit block 101 and a pair of slide cams. The unit block 101 has a box shape, and a vertical cam 102 and a horizontal cam 103 are slidably fitted therein. The sliding surfaces 102A and 103A of the vertical cam 102 and the horizontal cam 103, which are inclined so as to slide with each other, are overlapped with each other. The unit block 101 guides the vertical cam 102 and the horizontal cam 103, and functions as a guide so that each can move linearly in the vertical direction and the horizontal direction. A block 106 on which a punch 105 is projected is fixed to the horizontal cam 103. And the punch 1
05, a return rubber 107 made of urethane rubber
Has been fitted.

Therefore, in such a cam unit 100 for press working, when a pressing load P is applied to the vertical cam 102 in a vertically downward direction, the force is transmitted by changing the direction by 90 degrees in the horizontal direction. When the vertical cam 102 receives a pressing load from above, the vertical cam 102 descends in the unit block 101 by the force, and accordingly the horizontal cam 103 slides on the inclined sliding surfaces 102A, 103A with the vertical cam 102, and the unit Extruded from block 101. Therefore, the punch 105 is driven into the die 200, and the work W is perforated. When drilling, punch 105
, The return rubber 107 is crushed. Therefore, when the pressing load P is released and the vertical cam 102 is released, the elasticity of the return rubber 107 causes the horizontal cam 10 to move.
3 is pushed back, and the vertical cam 102 is pushed back by sliding the sliding surfaces 102A, 103A with the horizontal cam 103 again.

[0004]

In such a cam unit 100 for press working, since the punch 105 for punching moves integrally with the horizontal cam 103 to perform the processing, the working direction of the punch 105 is the movement of the horizontal cam 103. Determined by the direction. Therefore, to perform accurate machining, the horizontal cam 103 is required.
It is necessary to ensure accurate movement of the cam unit 1 including the unit block 101.
A total dimensional accuracy of 00 is required. Conversely, this indicates that a unit having poor dimensional accuracy has poor machining accuracy such as drilling accuracy. Therefore, in order to increase the processing accuracy, a high-quality bell is required for the cam unit 100 for press working itself, which leads to an increase in unit cost.

[0005] Although such a cam unit for press working is conventionally commercially available, most of the commercially available cam units convert the direction of the pressing load P by 90 degrees, so that the cam unit at other angles is required. When processing was necessary, a cam unit for press working was designed each time. For example, as shown in FIG. 9, when drilling a workpiece W inclined by an upward punch 115, a vertical cam 112 and a horizontal cam 113, and a unit block 1 for guiding these.
11 had to be newly designed. When a new unit such as the cam unit 110 for press working is newly designed, the overall shape is greatly changed due to a difference in the working direction, so that it is difficult to share parts for each unit and the manufacturing cost of the unit is reduced. It was a burden.

In the case of a conventional cam unit such as a cam unit 100 for press working, sliding surfaces 102a, 103a
Vertical cam 102 and horizontal cam 1
03 is pushed and moves. Therefore, when the angle between the moving direction of the vertical cam 102 or the horizontal cam 103 and the sliding surface 102A, 103A is reduced, the vertical stress is reduced while the shear stress is increased, and it is difficult to move the vertical cam 102 and the horizontal cam 103. become. Further, it is not possible to punch the punch 105 in the direction 180 ° reversed from the direction of the pressure P. Therefore, in the case of the conventional cam unit for press working, there is a certain limitation in the design change of the working direction in which the working tool is moved. Further, in the case where a hole is drilled in a close position, for example, the cam unit 1 for press working
It is conceivable that two 00s are arranged and processed by the same press machine. However, since each unit has a certain width, when the units are arranged side by side, there is a restriction in narrowing the interval between the processing positions, so that it is not possible to perform the processing at a very close position at the same time.

In view of the above, the present invention has been made to solve the above-mentioned problems, and to provide a press working cam unit which ensures working accuracy easily. Providing units,
Another object of the present invention is to provide a cam unit for press working capable of simultaneously performing two or more workings in close proximity.

[0008]

A cam unit for press working according to the present invention has a unit block having an arcuate guide surface and an arcuate slide surface having the same radius of curvature as the guide surface. An arc cam slidable in the circumferential direction by sliding a moving surface on the guide surface, and having an abutting surface at each end of the sliding direction substantially orthogonal to the sliding direction; The cam is slidably supported in a direction substantially perpendicular to one contact surface of the cam, and one end slides by being pressed by a press machine, and the other end of the circular cam is slid by the sliding. A pressure pin that presses a contact surface to slide the arc cam, and is slidably supported by the unit block in a direction substantially orthogonal to the other contact surface of the arc cam, and a processing tool is provided at one end. And the other end is pressed against the other contact surface of the arc cam It is slid by, and having a working pin performing predetermined processing on the workpiece by the machining tool by sliding.

Therefore, according to the present invention, since the pressure pin, the arc cam, and the processing pin are configured separately, it is hardly affected by the arc cam and the like, and the adjustment of the processing pin for directly processing the work is performed. The processing accuracy can be increased only by the above. Further, according to the present invention, the machining angle can be easily changed by arbitrarily changing the size of the arc of the arc cam and adjusting the moving direction of the machining pin. In many cases, parts can be shared, and the setting of the processing angle can be easily changed at low cost. Further, the resistance at the time of load transmission is smaller than that of the conventional slide cam, and does not largely change depending on the angle between the pressing pin and the processing pin.

The cam unit for press working according to the present invention is characterized in that the arc cam is supported by a unit block at a center of curvature of the guide surface.
Therefore, according to the present invention, the movement of the circular cam sliding in the circumferential direction by the force acting on the circular cam does not shift, and a stable movement about the supported shaft can be performed. .

In the cam unit for press working according to the present invention, a plurality of arc cams are overlapped in the axial direction of the center of curvature of the guide surface and slidably disposed independently of each other. And a plurality of pressure pins and processing pins corresponding to the above. Therefore, according to the present invention, a plurality of machining can be simultaneously performed by one unit, and particularly, since the interval between adjacent machining pins is equal to the thickness of the arc cam, machining is performed at two or more locations in close proximity. It becomes possible.

The cam unit for press working according to the present invention is characterized in that the plurality of working pins include those having different sliding directions, and the plurality of pressing pins all have the same sliding direction. And Thus, according to the present invention,
Multiple processing can be performed simultaneously by one unit,
In particular, it is possible to arbitrarily adjust the processing direction of adjacent processing portions.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of a cam unit for press working according to the present invention will be described with reference to the drawings. 1 and 2 are cross-sectional views showing a cam unit for press working according to a first embodiment. In particular, FIG.
FIG. 2 shows a state during processing. The cam unit 10 for press working supports the arc cam 1 as shown in FIG. 1 and is provided in the unit block 2 assembled. The fan-shaped arc cam 1 has an arc-shaped sliding surface 1A.
Are mounted on the guide surface 16A of the unit block 2 having the same radius of curvature, and the unit block 2 is supported by the anchor pin 3 at the center of curvature of the guide surface 16A.

A pressure pin 4 penetrates the unit block 2 from above, a lower end of the pressure pin 4 abuts against one contact surface 1B of the arc cam 1, and a processing pin 5 penetrates at a predetermined angle from the lateral direction. And the tip is the other contact surface 1 of the arc cam 1
Assigned to C. The pressure pin 4 and the processing pin 5 are slidably fitted via bushes 6 and 7 so as to move in the axial direction without any axial displacement, and furthermore, are circumferentially aligned along the guide surface 16A. Cam 1 that slides in the direction
Is formed such that the contact surfaces 1B and 1C are formed in a direction substantially perpendicular to the sliding direction, and the pressing pin 4 and the processing pin 5 are applied from a direction substantially perpendicular to the contact surfaces 1B and 1C. ing. The processing pin 5 includes a punch 5A, which is a processing tool for making a hole in a work, and a return rubber 8 made of urethane rubber is fitted therein.

FIG. 3 is an exploded perspective view of the cam unit 10 for press working (the pressing pin 4 and the working pin 5).
Omitted). The unit block 2 is formed by integrally combining an upper block 11 and a lower block 12 as illustrated. The upper block 11 is formed by fixing pivot supporting blocks 15 on both sides of a pin guide block 14 on the bottom surface of a fixed plate 13, and the lower block 12 is formed with a guide groove at the center of one block body. 16 are formed. The guide groove 16 has a guide surface 16 </ b> A having the same radius of curvature as the arc cam 1, and is formed with a groove width corresponding to the thickness of the arc cam 1 so as to receive the lateral deviation of the arc cam 1. Cam unit for press working 10
Is such that the arc cam 1 is supported on the support blocks 15 by an anchor pin 3, and the arc cam 1 is
A and upper block 11 and lower block 12
Are combined to form an integrated unit block 2.

Next, a description will be given of a case where a hole is formed in a workpiece by using the cam unit 10 of the present embodiment. A pressing load P is applied to the pressing pin 4 in the axial direction from above by a press machine. Therefore, when the pressure pin 4 is pressed down from below and pressed down, the arc cam 1 applied to the tip of the pressure pin 4 is pressed to perform an arc motion. The circular motion is a movement of the circular cam 1 in the circumferential direction (arrows A and B) about the pivotally supported anchor pin 3, and the sliding surface 1A guides the circumferential movement. It slides along the guide surface 16A of the groove 16. Therefore, the arc cam 1 receiving the pressing load P is
, On which the circular motion is performed.

The arc cam 1 pressurized in the state shown in FIG. 1 moves the processing pin 5 applied to the contact surface 1C opposite to the pressing pin 4 by an arc motion in the direction of movement (arrow). Extrude to A). Working pin 5 pressed by arc cam 1
The punch 5A presses the die 50 while crushing the return rubber 8.
The workpiece W is punched by the punch 5A. When the work 50 is thus drilled, the pressing load P on the pressing pin 4 is released, and
A series of load transmission systems using the pressing pin 4, the arc cam 1, and the processing pin 5 is free in the opposite direction (arrow B).
Therefore, the processing pin 5 is pushed back by the restoring force of the crushed return rubber 8, and the punch 5 </ b> A is extracted from the die 50 and the work W. Then, the arc cam 1 performs an arc motion in the opposite direction (arrow B) by the return of the processing pin 5, pushes up the pressure pin 4 and returns to the state shown in FIG.

Therefore, according to the cam unit 10 for press working of the present embodiment, the following effects are attained by solving the conventional problems. In the cam unit 10 for press working, since the processing pin 5 for directly processing the workpiece 50 and the circular cam 1 are separated, only the dimensional accuracy of the processing pin 5 is increased without being affected by the circular cam 1 or the like. Processing can be performed at an accurate angle. When transmitting a pressurized load by changing the direction, it is most difficult to increase the accuracy of the load transmitting portion. Therefore, unless a high level of dimensional accuracy is required for the arc cam 1, the unit component parts are not required. Processing is simplified, and manufacturing costs can be reduced. Also,
According to the configuration of the cam unit of the present embodiment, the processing pin 5
Since the machining angle can be changed by adjusting the moving direction of the workpiece, parts can be shared in many cases, and the setting of the machining angle can be easily changed at low cost.

According to the cam unit using the arc cam of the present embodiment, the cam unit for forming a hole at a different angle as described above can be easily designed and provided.
Therefore, a modified example of the cam unit in which the processing angle is changed will be briefly described below. 4 and 5 are cross-sectional views showing the cam units 20 and 30 for press working in which the working angles are respectively changed. First, the cam unit 20 for press working shown in FIG. 4 transmits the downward pressing load P acting on the pressing pin 21 by converting the downward pressing load P by 90 degrees by the arc cam 22 and moving the processing pin 23 in the horizontal direction. It was done.

This press working cam unit 20 is made of the same member as the press working cam unit 10 shown in FIG. 1 except that the shape of the pin guide block 24 and the center angle θ of the arc cam 22 are widened. It is configured. Therefore, when the angle is changed within the predetermined range, the members can be shared in each unit, and the cost of each unit can be reduced. In addition, if the angle is slightly changed, only the movement of the processing pin 23 provides the processing accuracy. Therefore, for example, the axial movement amount of the pressing pin 21 without replacing the arc cam 1 shown in FIG. May be adjusted.

On the other hand, when the angle is largely changed, it is necessary to change the design of the entire unit, such as the cam unit 30 for press working in FIG. The cam unit 30 for press working is such that the downward pressing load P acting on the pressing pin 31 is inverted by 180 degrees by the arc cam 32 to push the working pin 33 upward. The cam unit 30 for press working cannot share parts with those shown in FIG. 1, but the working accuracy is determined only in the moving direction of the working pin 5, so that the cost of the cam unit for press working is suppressed. Can do it. Therefore, according to the cam units 10, 20, and 30 for press working of the present embodiment, the working angle can be arbitrarily changed, and in particular, it is possible to change the direction by 180 degrees, which was impossible with a conventional slide cam. Was. Furthermore, even when the pressing pin and the processing pin have an acute angle relationship, the sliding resistance of the arc cam does not become extremely large, so that processing at any angle can be performed smoothly.

Next, according to the configuration of the cam unit for press working of the present invention, a plurality of workings can be performed by one unit. FIG. 6 is a cross-sectional view showing a second embodiment of the cam unit for press working according to the present invention, which enables simultaneous processing of two places. Particularly, it is a cam unit for press working in which drilling is performed simultaneously at different angles. This cam unit 4 for press working
Numeral 0 denotes two arc cams 41 and 42 having the same radius of curvature and different center angles (θ1, θ2), which are arranged in the unit block 43. The fan-shaped arc cams 41 and 42 are provided so that the centers of both superposed cams are pivotally supported by the anchor pins 44 and slide on the guide surface 67A having the same radius of curvature.

Pressing pins 45, 46 penetrate the unit block 43 from above corresponding to the arc cams 41, 42, and the lower ends thereof are brought into contact with one contact surfaces of the arc cams 41, 42, respectively. ing. On the other hand, from the lateral direction, the processing pins 47 and 48 respectively penetrate the unit block 43 at a predetermined angle, and the ends of both the processing pins 47 and 48 are applied to the other contact surfaces of the respective arc cams 41 and 42. I have. The pressure pins 45, 46 and the processing pins 47, 48 are slidably fitted via bushes 49, 49, 50, 50 so as to be able to move in the axial direction without any axial displacement. The working pins 47 and 48 are provided with punches 47A and 48A for making holes in the work, and return rubbers 51 and 51 made of urethane rubber are fitted therein.

Next, FIG. 7 is an exploded perspective view of the cam unit 40 for press working (the pressing pins 45 and 46 and the working pins 47 and 48 are omitted). First, the unit block 43
The upper block 61 and the lower block 62 are integrally combined. The upper block 61 has two pin guide blocks 64 and 65 on the bottom surface of the fixed plate 63.
And the shaft support blocks 66, 66 sandwiching them are fixed in parallel, and one of the lower blocks 62 has a guide groove 67 cut out at the center of the block body. Guide groove 67A
Are formed to have a width of a plate thickness in which substantially two arc cams 41 and 42 are overlapped so as to receive the lateral shake of the arc cams 41 and 42. That is, the arc cams 41 and 42 are connected to the lower block 62.
The cams 41 and 42 are guided by each other. Guide surface 67A
Are formed with the same radius of curvature as the arc cams 41 and 42,
Each of the arc cams 41 and 42 is formed to have a corresponding arc length. Such a cam unit 4 for press working
0 is an arc cam 4 with an anchor pin 44 on the upper block 61.
As shown in FIG.
The upper block 61 and the lower block 62 are screwed together to form an integrated unit such that the arcuate sliding surfaces 41A and 42A slide on the guide surface 67A of the lower block 62. .

Therefore, the cam unit 4 for press working
Drilling using 0 is performed as follows. A pressing load P is applied to the pressing pins 45 and 46 in the axial direction from above by the same press machine. The pressing pins 45 and 46 pressed from above are lowered in the axial direction, and the arc cams 41 and 42 applied to the tips of the pressing pins 45 and 46 are
A circular motion is performed by the pressing load P. The circular motion is performed by circular cams 41 and 4 around the anchor pin 44.
2 in the circumferential direction, and the sliding surfaces 41A, 42
A slides along the guide surface 67A that guides the movement in the circumferential direction. Therefore, the arc cam 41 receiving the pressing load P,
42 is supported by the lower block 62 and the guide surface 6
The circular motion is performed by sliding on 7A.

The pressurized arc cams 41, 42
Pushes the processing pins 47 and 48 applied to the contact surfaces on the side opposite to the pressing pins 45 and 46 by arc motion in the direction of the motion (arrow A). The processing pins 47 and 48 pressed by the arc cams 41 and 42 are protruded to a work (not shown), and punches 47A and 48A are driven into predetermined positions.
When the punches 47A and 48A are driven into the work and the drilling is completed, the pressing load P on the pressing pins 45 and 46 is released, and the pressing pins 45 and 46 and the arc cams 41 and 46 are released.
42, and a series of load transmitting systems by the processing pins 47 and 48 become free in the opposite direction (arrow B). Therefore, the punches 47A, 48A of the processing pins 47, 48 pushed back by the restoring force of the return rubbers 51, 51 are extracted from the work. Further, the processing pins 47 and 48 are
42 in the direction of arrow B, thereby causing the arc cam 41,
42 moves in an arc to push up the pressure pins 45 and 46, and returns to the state shown in FIG.

Therefore, according to the cam unit 40 for press working of this embodiment, a plurality of workings can be performed by one unit. In the description, two arc cams 41 and 42 are provided to perform machining at two locations, but it is also possible to perform more machining. Further, it is possible to freely change the design so that the processing angles are the same or different. Furthermore, since they are provided in one unit, the processing interval, that is, the punch 4
The distance between 7A and 48A can be narrowed, and can be freely widened.

While the embodiment of the cam unit for press working according to the present invention has been described above, the present invention is not limited to such an embodiment, and various modifications can be made without departing from the spirit of the present invention. Is possible. For example, in the above-described embodiment, the cam unit for press working in the case of performing drilling is shown, but it is possible to cope with various kinds of processing such as providing a working pin with a punch for overhang forming.

[0029]

According to the present invention, the arc cam slides on the guide surface of the unit block in the circumferential direction on its sliding surface, and the pressing pin pressed by the press machine presses one of the arc cams. The contact surface is pressed to slide the arc cam in the circumferential direction, and the slid arc cam further presses the processing pin to perform predetermined processing on the workpiece, so that the workpiece is directly processed. Since the processing accuracy can be increased only by adjusting the processing pins, it has become possible to easily provide a cam unit for press processing that ensures the processing accuracy. Further, the design change of the processing angle can be easily performed, and the processing angle can be changed at low cost. In addition, the present invention is configured to include a plurality of arc cams that independently perform an arc motion, and a pressure pin and a processing pin corresponding to the arc cam, so that a plurality of machining can be simultaneously performed by one unit. In particular, since the interval between the adjacent processing pins is equal to the thickness of the arc cam, it is possible to provide a cam unit for press processing capable of performing two or more processings at close positions.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a cam unit for press working according to a first embodiment of the present invention before working.

FIG. 2 is a cross-sectional view of the cam unit for press working according to the first embodiment of the present invention at the time of working.

FIG. 3 is an exploded perspective view showing the cam unit for press working of the first embodiment according to the present invention.

FIG. 4 is a sectional view showing a modification of the cam unit for press working of the first embodiment.

FIG. 5 is a cross-sectional view showing a modification of the press working cam unit of the first embodiment.

FIG. 6 is a sectional view showing a cam unit for press working according to a second embodiment of the present invention.

FIG. 7 is an exploded perspective view showing a cam unit for press working according to a second embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a conventional cam unit for press working.

FIG. 9 is a cross-sectional view showing a conventional cam unit for press working.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Arc cam 1A Sliding surface 2 Unit block 3 Anchor pin 4 Pressure pin 5 Processing pin 5A Punch 10 Cam unit for press working 11 Upper block 12 Lower block 14 Pin guide block 16 Guide groove 16A Guide surface

Claims (4)

[Claims] 1. A unit block having an arcuate guide surface, an arcuate sliding surface having the same radius of curvature as the guide surface,
An arc cam slidable in the circumferential direction by sliding the sliding surface on the guide surface, and having an abutting surface substantially orthogonal to the sliding direction at both ends of the sliding direction; The circular cam is slidably supported in a direction substantially perpendicular to one contact surface of the circular cam, and slides by being pressed at one end by a press machine, and the other end of the circular cam is slid by the sliding. A pressure pin that presses against the contact surface of the circular cam to slide the arc cam, and is slidably supported by the unit block in a direction substantially perpendicular to the other contact surface of the arc cam, and is processed at one end. A tool is provided, and has a working pin that slides when the other end is pressed against the other contact surface of the arc cam, and performs predetermined processing on the work by the working tool by the sliding. Press working cam unit. 2. The cam unit for press working according to claim 1, wherein the arc cam is supported by a unit block at a center of curvature of the guide surface. . 3. The cam unit for press working according to claim 1, wherein a plurality of arc cams are overlapped in an axial direction of a center of curvature of the guide surface and slidable independently of each other. A cam unit for press working which is provided and has a plurality of said pressing pins and working pins corresponding to respective arc cams. 4. The cam unit for press working according to claim 3, wherein the plurality of working pins include those having different sliding directions, and the plurality of pressing pins all have the same sliding direction. A cam unit for press working, characterized in that: