JP4689894B2 - Straightening device for bottomed cylindrical member - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a strain relief device for a bottomed cylindrical member, and more particularly to a strain relief device suitable for strain relief of a cast aluminum wheel for automobiles.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is known a distortion removing device that removes distortion generated during the production of cast parts and the like, and is disclosed, for example, in Japanese Patent Application Laid-Open No. 7-124649 as a vehicle wheel rim distortion removing device. The strain relief device disclosed in the same publication measures the inner diameter of the wheel rim by a distance sensor, and presses the short diameter portion with a press to expand the diameter according to the degree of collapse of the short diameter portion based on the measurement result. It is composed of.
[0003]
[Problems to be solved by the invention]
Regarding the aluminum wheel of an automobile, it has a bottomed cylindrical shape including a spoke part as well as a cylindrical wheel rim as described in the above publication, and in such a bottomed cylindrical member distortion removing device Is arranged on the support plate so that the bottom of the member is located at the top, and a dedicated tool, for example, a dedicated block is arranged in the cylinder at a predetermined distance from the bottom surface, and the bottom is pressed from above. It is comprised so that the distortion of the said member may be removed. Accordingly, the above-described distortion removal cannot be performed by the distortion removal apparatus described in the above publication. The aluminum wheel has a plurality of holes in the bottom and does not form a closed bottom surface, but the bottomed cylindrical member that is the subject of the present invention has an opening in the bottom as described above. Including what you have.
[0004]
However, in the strain relief device for the bottomed cylindrical member as described above, it is necessary to prepare a dedicated block to be accommodated in the cylindrical body. If the shape of the target bottomed cylindrical member is different, a separate dedicated block is required. Must be prepared. Eventually, it is necessary to prepare a plurality of blocks conforming to the shape in each cylinder according to a plurality of objects to be processed, and to replace them. Therefore, not only the cost of the block itself, but also a process for storing and exchanging them is necessary, which also increases the cost. In particular, when a variety of products and a small amount are produced as in the recent times, the time required for the block replacement process leads to a significant increase in manufacturing cost.
[0005]
Therefore, the present invention provides a bottomed cylindrical member that can be easily distorted without requiring replacement of a dedicated tool or the like for a plurality of bottomed cylindrical members having different shapes and sizes. It is an object to provide a strain relief device.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a support base on which the open end side of a bottomed cylindrical member is placed, a bearing fixed to the support base, and the bottomed cylindrical member with respect to the bearing. A shaft member that is movably supported along a central axis, a receiving base that is fixed to the tip of the shaft member and is disposed so as to be in contact with the bottom inner surface of the bottomed cylindrical member, and the shaft member that is the bottomed cylinder A first drive device that drives along the central axis of the body member; a press head that faces the distal end surface of the cradle and that is movably supported along the central axis of the shaft member; and A second driving device that drives along the central axis of the shaft member, and the bottomed cylindrical member is disposed on the support base, and the first driving device is driven to The gap between the bottomed cylindrical member and the inner surface of the bottom is adjusted to a predetermined distance, and the second driving device is driven. The press head is driven in the receiving direction to move the bottom of the bottomed cylindrical member along the central axis by the predetermined distance, and the open end of the bottomed cylindrical member is removed on the support base. The bottomed cylindrical member is moved in the direction to remove distortion.
[0007]
Further, as defined in claim 2, a plurality of arms that are swingably supported in parallel with the upper surface of the support base and arranged so as to be in contact with the inner surface of the cylindrical body portion of the bottomed cylindrical member member, It is assumed that there is provided a third driving device that simultaneously swings the plurality of arms and drives the inner surface of the cylindrical portion of the bottomed cylindrical member, and drives the third driving device to provide the bottomed cylinder. It is good also as arrange | positioning a body member in the predetermined position of the upper surface of the said support stand. The third driving device may be configured to be driven before the first driving device is driven.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of a strain relief device for a bottomed cylindrical member of the present invention will be described with reference to the drawings. 1 to 6 show a distortion eliminating device for a cast aluminum wheel for automobile according to an embodiment of the present invention, and a cast aluminum wheel for automobile is used as a bottomed cylindrical member. The overall configuration of the strain relief device is shown in FIGS. 5 and 6, and FIG. 1 shows the support device 10 and the press device 20 of the main configuration. In FIGS. 5 and 6, hatching is omitted. As shown in FIG. 1, the support base of the present invention comprises a square-plate support base 11 and an annular plate support base 12 fixed thereto. Further, the bottomed cylindrical member to be subjected to distortion removal in the present embodiment is a cast aluminum wheel (hereinafter referred to as a workpiece W) indicated by a two-dot chain line in FIG. 1, which is formed from the bottom portion Wb and the cylindrical portion Wc. The open end portion We of the bottomed cylindrical aluminum casting part is placed on the support base 12.
[0009]
First, the configuration of the support device 10 and the press device 20 will be described with reference to FIGS. 1 to 4. In FIG. 1, a bearing 111 is fixed at the center of a support base 11 constituting the support device 10, and a hollow spline shaft 112, which is a shaft member of the present invention, is movable in the vertical direction of FIG. It is supported. A cradle 113 is fixed to the tip of the spline shaft 112, and a ball screw mechanism is fixed to the other end. That is, the ball nut 121 is fixed to the hollow portion of the spline shaft 112, and a part of the screw shaft 122 that is screwed to the ball nut 121 is accommodated in the hollow portion of the spline shaft 112, thereby constituting the ball screw mechanism. Yes. A plate 14 is supported on the support base 11 via a plurality of shafts 13, and the end of the screw shaft 122 is rotatably supported on the plate 14 via a bearing 15. A pulley 131 is fixed between the ball nut 121.
[0010]
The pulley 131 is connected to the pulley 133 via the belt 132, and the pulley 133 is fixed to the output shaft of the servo device 130 that constitutes the first driving device of the present invention. The servo device 130 can rotate the output shaft at a rotation angle corresponding to the drive signal, and is fixed to the support base 11 via the bracket 16. Thus, when the cradle positioning mechanism 120 is configured and the servo device 130 rotates, the screw shaft 122 is rotationally driven via the pulley 133, the belt 132, and the pulley 131, and the ball nut 121 screwed into the screw nut 122 is shown in FIG. Move up or down. Along with this, the spline shaft 112 to which the ball nut 121 is fixed moves upward or downward in FIG. 1, and the cradle 113 moves up and down.
[0011]
Further, a spur gear 151 is disposed around the spline shaft 112 at the center of the lower surface of the support base 11 via a base 17 and a bearing 18. Plural (three in this embodiment, one of which appears in FIG. 1) spur gears 152 are arranged so as to mesh with the spur gear 151. The spur gear 152 is fixed to one end of a shaft 156 rotatably supported by the support base 11 via a bearing 155, and an arm 157 is fixed to the other end side. That is, as apparent from FIG. 2 showing the upper surface side of FIG. 1 and FIG. 3 showing the lower surface side, the spur gears 152 to 154 are arranged at equal intervals around the spur gear 151. A support base 11 is rotatably supported so as to mesh with external teeth. A rack 161 meshes with the spur gear 152 to form a rack and pinion mechanism, and a cylinder 162 that drives the rack 161 is fixed to the lower surface of the support base 11. Thus, the rack 161, the cylinder 162, and the spur gears 152 to 154 constitute the third drive device of the present invention.
[0012]
Thus, when the workpiece positioning mechanism 110 is configured and the rack 161 moves back and forth by the cylinder 162, the spur gear 152 rotates, the spur gear 151 meshing with the spur gear 152 rotates in the reverse direction, and the spur gear meshing with the spur gear 151. 153 and 154 rotate in the opposite direction to the spur gear 151, and thus in the same direction as the spur gear 152. As a result, the tip of the arm 157 fixed to the shaft 156 together with the spur gear 152 swings in the direction of moving outward, and sequentially moves, for example, as indicated by a two-dot chain line. Although the reference numerals are omitted, the arm fixed to the shaft together with the spur gears 153 and 154 operates in the same manner.
[0013]
On the other hand, the press device 20 is disposed above the support device 10, and the press head 211 constituting the press device 20 faces the front end surface of the cradle 113 and can move along the same axis as the central axis of the spline shaft 222. It is supported by. As shown in FIGS. 4 and 5, the press device 20 is supported by a press head 211 via a press head positioning mechanism 200 on a support member 23 that is slidably supported by support columns 21 and 22 and moves in a vertical direction. At the same time, a pressing cylinder 30 (FIG. 5) that drives the support member 23 in the vertical direction together with these is supported by the tip portions of the support columns 21 and 22. That is, the support member 23 is driven by the cylinder 30 so as to move up and down along the support pillars 21 and 22, and accordingly, the press head positioning mechanism 200 supported by the support member 23 is also driven so as to move up and down. Will be.
[0014]
A plate 24 is fixed to the support member 23, and a bearing 221 is fixed to the center of the plate 24. A hollow spline shaft 222 is supported by the bearing 221 so as to be movable in the vertical direction in FIG. The tip of the spline shaft 222 is disposed so as to face the support member 213 with a predetermined distance, and the support member 213 is supported by the plate 24 via a pair of return mechanisms 230. The return mechanism 230 is supported so that the bearing 231 supported by the plate 24, the support column 232 slidably supported by the plate 24 and movable in the vertical direction, and the support member 213 return to the original position shown in FIG. It comprises a coil spring 233 that urges the column 232, and in the state shown in FIG. 4, the support member 213 is configured to be held in its original position.
[0015]
Further, a ball nut 223 is fixed to the upper end of the hollow portion of the spline shaft 222, and a part of the screw shaft 224 that is screwed to the ball nut 223 is accommodated in the hollow portion of the spline shaft 222, thereby constituting a ball screw mechanism. Has been. The screw shaft 224 is connected to a servo device 210 having the same configuration as the servo device 130 via a pulley and belt connection mechanism similar to the connection mechanism between the screw shaft 122 and the servo device 130 described above. The screw shaft 224 is rotationally driven by 210.
[0016]
Thus, when the servo device 210 rotates, the screw shaft 224 is driven to rotate, and the ball nut 223 screwed with the screw shaft 224 moves downward in FIG. Accordingly, the spline shaft 222 to which the ball nut 223 is fixed moves downward in FIG. 4 and abuts on the support member 213. When the spline shaft 222 further moves downward, the coil spring 233 is compressed and the support member 213 is moved downward. Move to. Therefore, if the support member 213 is held at a predetermined position, the press head 211 is positioned at the predetermined position. When the servo device 210 is rotated in the opposite direction, the tip of the spline shaft 222 is separated from the support member 213, and the support member 213 is returned to the original position by the urging force of the coil spring 233. Thus, the press head 211 is configured to be positioned by the servo device 210 that constitutes the second driving device of the present invention. As shown in FIG. 4, a sensor 216 for detecting the original position of the support member 213 is provided.
[0017]
The servo devices 130 and 210, the cylinders 30 and 162, etc. are automatically driven and controlled as shown in FIG. 7 by a control device (not shown) composed of, for example, a microcomputer. First, in step S1, the workpiece W is carried onto the support device 10 by a robot device (not shown), for example, at the position shown in FIG. Next, the process proceeds to step S2, and the position of the workpiece W is adjusted to a predetermined position on the support base 12 by the workpiece positioning mechanism 110 described above at the position shown in FIG. In this state, the process proceeds to step S3, and the support device 10 is disposed below the press device 20 as shown in FIG.
[0018]
Subsequently, in step S4, the position of the cradle 113 is adjusted by the cradle positioning mechanism 120 described above. For example, the cradle 113 is driven up by the servo device 130 until it comes into contact with the lower surface of the bottom Wb of the workpiece W, and is driven downward by a predetermined distance d from this position, whereby the space between the lower surface of the bottom Wb of the workpiece W and the cradle 113 is increased. The position of the cradle 113 is adjusted so as to be the predetermined distance d. Similarly, in step S <b> 5, the press head 211 is driven downward until the press head 211 comes into contact with the upper surface of the bottom Wb of the work W by the servo device 210.
[0019]
In this state, the workpiece positioning mechanism 110 is released in step S6, the cylinder 30 is driven in step S7, and the press device 20 and thus the press head 211 are driven downward by a predetermined distance d. As a result, a load is applied to the bottom Wb of the workpiece W, the bottom Wb of the workpiece W moves by a predetermined distance d along its central axis, and the open end We moves outward on the support base 12, and as a result. The distortion of the workpiece W is removed. Then, after each device such as the support device 10 and the press device 20 is driven back to the original position in step S8, the process proceeds to step S9, and the workpiece W is carried out by the robot device (not shown) from the state of FIG.
[0020]
Thus, when the distortion of an aluminum wheel having a shape different from that of the workpiece W is performed, the servo devices 130 and 210, the cylinders 30 and 162, etc. by a control device (not shown) are selected according to the shape. By simply changing the driving amount, it is possible to remove distortion appropriately without changing tools such as the cradle 113. Note that the object of distortion removal is not limited to the aluminum wheel, and distortion removal can be appropriately performed as long as it is a bottomed cylindrical member.
[0021]
【The invention's effect】
Since the present invention is configured as described above, the following effects can be obtained. That is, in the bottomed cylindrical member distortion removing device of the present invention, the bottomed cylindrical member is disposed on the support base, and the first driving device is driven to receive the base and the bottom inner surface of the bottomed cylindrical member. And the second drive device is driven to drive the press head in the direction of the cradle to move the bottom of the bottomed cylindrical member along the central axis by a predetermined distance. Since the open end portion of the bottom cylindrical member is moved outward on the support base so as to remove the distortion of the bottomed cylindrical member, a plurality of bottomed cylindrical members having different shapes and sizes are provided. On the other hand, it is possible to remove the distortion appropriately and easily without requiring replacement of a tool or the like.
[0022]
Furthermore, according to the distortion removing device configured as described in claim 2, the third driving device can be driven to dispose the bottomed cylindrical member at a predetermined position on the upper surface of the support base. The position adjustment of the bottomed cylindrical member when taking out can be performed appropriately and easily. The third driving device may be driven before the first driving device is driven.
[Brief description of the drawings]
FIG. 1 is a partial cross-sectional view showing a main part of a strain relief device for a bottomed cylindrical member according to an embodiment of the present invention.
FIG. 2 is a plan view of a support device in the strain relief device of FIG. 1;
3 is a bottom view of a support device in the strain relief device of FIG. 1. FIG.
FIG. 4 is a partial cross-sectional view showing a press device constituting a strain relief device according to an embodiment of the present invention.
FIG. 5 is a partial cross-sectional front view showing an overall configuration of a strain relief device according to an embodiment of the present invention.
FIG. 6 is a partial cross-sectional side view showing the overall configuration of the strain relief device according to one embodiment of the present invention.
FIG. 7 is a flowchart showing an example of a distortion removing operation by the distortion removing apparatus according to the embodiment of the present invention.
[Explanation of symbols]
W work, 10 support device, 11, 12 support base,
20 press machine, 30 cylinder, 113 cradle,
110 workpiece positioning mechanism, 120 cradle positioning mechanism,
130, 210 servo devices, 157 arms,
151, 152, 153, 154 spur gear, 161 rack,
162 cylinder, 200 press head positioning mechanism,
211 press head

Claims (2)

A support base for placing the open end side of the bottomed cylindrical member, a bearing fixed to the support base, and a shaft member that supports the bearing so as to be movable along the central axis of the bottomed cylindrical member A pedestal fixed to the tip of the shaft member so as to be able to contact the inner surface of the bottom of the bottomed cylindrical member, and a first driving the shaft member along the central axis of the bottomed cylindrical member A drive head, a press head facing the tip surface of the cradle and movably supported along the central axis of the shaft member, and a second driving the press head along the central axis of the shaft member The bottomed cylindrical member is disposed on the support base, and the first driving device is driven to form a gap between the receiving base and the bottom inner surface of the bottomed cylindrical member. The distance is adjusted to a predetermined distance, and the second driving device is driven to drive the press head in the direction of the cradle. The bottom of the bottomed cylindrical member is moved along the central axis by the predetermined distance, and the open end of the bottomed cylindrical member is moved outward on the support base to remove distortion of the bottomed cylindrical member. A device for removing distortion of a bottomed cylindrical member, characterized in that: A plurality of arms that are supported so as to be swingable in parallel with the upper surface of the support base and that can be brought into contact with the inner surface of the cylindrical portion of the bottomed cylindrical member; A third driving device is provided for driving in the inner surface direction of the cylindrical body portion of the bottom cylindrical member, and the third driving device is driven to place the bottomed cylindrical member at a predetermined position on the upper surface of the support base. 2. A strain relief device for a bottomed cylindrical member according to claim 1, wherein the device is configured as described above.

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