JP5513849B2 - Straightening device, and motion guide device including a member subjected to straightening processing by the straightening device - Google Patents

Description

  The present invention relates to a correction device used when correcting distortion of a shaft-like workpiece represented by, for example, a linear guide track rail, and a motion guide device including a member subjected to correction processing by the correction device. is there.

  For example, a conventional general correction device used for correcting distortion of a shaft-like workpiece detects the amount of distortion of the shaft-like workpiece with a detection head provided in a bending straightener, for example, and visually adds a portion to be corrected. After adjusting to the position of the pressure head, the pressure head is configured to press and correct.

  Further, in the related art relating to the straightening device, there is a straightening device that automates the straightening device as described above and corrects the distortion generated in the shaft-like workpiece with high efficiency. As a specific example of such an automated straightening device, for example, it is disclosed in Patent Document 1 below, and its specific configuration is described as a shaft-shaped workpiece (in Patent Document 1 below, “long steel”). Bend measuring machine that measures the bending of), bend straightening machine that corrects the bending of the axial workpiece, and the measurement result is taken from the bending measuring machine, and the axial workpiece should be corrected based on the measurement result It is provided with a control unit for calculating the location, the correction order, the correction amount and the correction direction, and controlling the bending correction machine according to the calculation result. With this configuration, when the shaft-like workpiece is placed on the bending straightener, it is detected whether or not the shaft-like workpiece has a bend, and if there is a bend, the location and the amount of the bend are measured. The measurement signal is sent to the control unit. Based on the measurement signal, the control unit calculates the portion to be corrected of the shaft-like workpiece, the correction order, the correction amount, and the correction direction. Further, the shaft-like workpiece in which the bending is detected by the bending measuring machine is conveyed to the bending correcting machine, and the bending is automatically corrected based on the calculation result of the control unit.

JP-A-1-309724

  By the way, all the conventional straightening devices as described above are configured to pressurize and straighten by moving the pressure head in a direction perpendicular to the axial direction of the shaft-shaped workpiece. The pressurizing / correcting force against the surface was always exerted as a point contact. Accordingly, in the correction using the conventional straightening machine, the applied pressure is always concentrated at one point. For example, in the case of a shaft-like work having opening holes at predetermined intervals, the pressure head is used. If the amount of pressure applied is incorrect, there is a risk that the shaft-shaped workpiece will break due to the concentrated load. Therefore, in the conventional straightening device, it is necessary to carefully control the amount of pressure applied to the shaft-like workpiece by the pressure head in accordance with the amount of strain, which requires a lot of work time for adjustment and the like.

  In addition, since the shaft-like workpiece is a long member having a length in the longitudinal direction, it is necessary to apply a pressurizing force based on point contact to a plurality of locations to correct the full length distortion. The work is very inefficient, and in the case of a shaft-like workpiece that wants to remove even minute distortions as typified by, for example, a linear guide track rail, the conventional correction device is used. However, it has been difficult to satisfactorily correct the distortion with the required accuracy.

  The present invention has been made in view of the existence of the above-described problems, and the purpose thereof is to efficiently strain the shaft-shaped workpiece, regardless of the shape of the shaft-shaped workpiece, Another object of the present invention is to provide a new straightening device that can be straightened with high accuracy, and a motion guide device that includes a member that has been straightened by the straightening device.

The straightening device according to the present invention includes a plurality of workpiece clamps that clamp and fix a shaft-shaped workpiece at a plurality of points in the axial direction, and a contactor that can freely contact and retract with respect to the shaft-shaped workpiece. A measuring sensor for measuring the amount of distortion of the workpiece, and by applying a pressing force to the shaft-like workpiece based on the amount of strain measured by the measuring sensor, the shaft-like workpiece is corrected in cooperation with the workpiece clamp. A pressing device, wherein the pressing device is installed on an arm member that is capable of rotating or swinging, and is pressed against the shaft-like workpiece while performing an arc motion. A pressing force based on surface contact is applied to the workpiece.

  According to the present invention, in a shaft-shaped workpiece having various shapes, a new straightening device capable of correcting the distortion generated in the shaft-shaped workpiece efficiently and with high accuracy, and correction processing by the straightening device. It is possible to provide a motion guide device including a member subjected to the above.

It is a partial fracture perspective appearance view for explaining composition of a motion guide device which has a track member (track rail) as a shaft-like work straightened by a straightening device concerning this embodiment. It is a longitudinal cross-sectional view for demonstrating the internal structure of the exercise | movement guide apparatus shown by FIG. 1A. It is the external appearance front view which showed the whole structure of the correction apparatus which concerns on 1st embodiment. It is a principal part front view for demonstrating the principal part of the correction apparatus which concerns on 1st embodiment. It is a schematic perspective view for demonstrating the basic operation | movement of the correction apparatus which concerns on 1st embodiment. It is an external appearance top view for demonstrating the whole structure of the correction apparatus which concerns on 2nd embodiment. It is a figure for demonstrating the structure of the carry-in stand with which the correction apparatus which concerns on 2nd embodiment is provided, a part view (a) is a top view, and a part view (b) is a front view. FIG. 7 is a three-view diagram illustrating a configuration of a displacement measurement unit included in the carry-in base illustrated in FIG. 6, where a partial view (a) is a top view, a partial view (b) is a left side view, and a partial view (c) is a rear view. Showing vision. It is the external appearance top view which showed the correction apparatus main body with which the correction apparatus which concerns on 2nd embodiment is provided. It is sectional drawing which drew A arrow view in FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments for carrying out the invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

[About axial workpiece]
First, a description will be given of an embodiment of a shaft-like workpiece that is to be corrected by the correction device according to the present embodiment. The shaft-like workpiece according to the present embodiment is a track rail 11 as a track member used in the motion guide device 10 as a linear guide shown in FIGS. 1A and 1B. The motion guide device 10 is a device conventionally known as a machine element component that moves a linear motion portion of a machine lightly and accurately. The motion guide apparatus 10 includes a track rail 11 and a moving block 13 as a moving body that is attached to the track rail 11 through a plurality of rolling elements 12. ing.

  The track rail 11 is a long steel member that has a substantially rectangular cross section perpendicular to the longitudinal direction and is formed in a shape having a concavity that is constricted at the center of both side surfaces. Rolling element rolling grooves 11a, which serve as tracks when the balls 12 roll, are formed over the entire length in the longitudinal direction of the track rails 11 in the vicinity of both ends of the upper surface and the upper portions of both side surfaces.

  On the other hand, the moving block 13 is composed of a moving block main body portion 13a made of a metal material and a pair of end plates 13b and 13b made of a resin material installed on both end surfaces of the moving block main body portion 13a in the moving direction. ing. The moving block body 13a is provided with load rolling element rolling grooves 13c at positions corresponding to the rolling element rolling grooves 11a. The rolling element rolling grooves 11a of the track rail 11 and the loaded rolling element rolling grooves 13c formed in the moving block main body 13a form a loaded rolling element rolling path 22 ..., and a plurality of the introduced rolling element rolling paths 22 are introduced into this passage. The balls 12 will roll while receiving a load. Moreover, the moving block main body 13a includes unloaded rolling element rolling paths 23 extending in parallel with the loaded rolling element rolling grooves 13c. Further, each of the pair of end plates 13b, 13b is provided with a direction changing path 25 that connects each unloaded rolling element rolling path 23 to each loaded rolling element rolling path 22. A combination of one loaded rolling element rolling path 22 and unloaded rolling element rolling path 23 and a pair of direction changing paths 25, 25 connecting them constitutes one infinite circuit (see FIG. 1B). ).

  A plurality of balls 12 are installed in an infinite circulation path composed of a loaded rolling element rolling path 22, an unloaded rolling element rolling path 23, and a pair of direction changing paths 25, 25 so as to be capable of infinite circulation, The reciprocating motion of the moving block 13 relative to the track rail 11 is possible.

  In the motion guide device 10 having the above-described configuration, the track rail 11 that receives a rolling load from the plurality of balls 12... Is in a region including the rolling element rolling grooves 11 a that serve as tracks when the balls 12 roll. On the other hand, the hardness of the surface is improved by quenching, thereby providing wear resistance and extending the life. The track rail 11 before completion is affected by heat due to the quenching process performed at this time. However, depending on the conditions of this quenching process, the track rail 11 after processing may be distorted.

  Further, as shown in FIG. 1A, in the longitudinal direction of the track rail 11, a plurality of opening holes 11b for setting the track rail are formed at predetermined intervals over the entire length thereof. The plurality of opening holes 11b are used when a screw used to securely fix the track rail 11 is installed, but the opening holes 11b are formed using a tool such as a drill. In some cases, the track rail 11 may be distorted during this processing.

  The correction device according to the present embodiment is a device that is used to efficiently and highly accurately correct the distortion generated in the track rail 11 during the above-described quenching process or drilling process. Therefore, next, a specific configuration of the correction device according to the present embodiment will be described. In addition, about the shape of the track rail 11 as a shaft-shaped workpiece demonstrated using FIG. 1A and FIG. 1B, a well-known form is illustrated and the correction apparatus which concerns on this invention is a shaft-shaped workpiece of all forms. Note that this is applicable to.

[Correction device according to the first embodiment]
The correction apparatus according to the first embodiment will be described with reference to FIGS. Here, FIG. 2 is an external front view showing the overall configuration of the correction device according to the first embodiment, and FIG. 3 is a key for explaining the main part of the correction device according to the first embodiment. FIG. FIG. 4 is a schematic perspective view for explaining the basic operation of the correction apparatus according to the first embodiment. In addition, about the member demonstrated using FIG. 1A and FIG. 1B, illustration may be abbreviate | omitted and it may demonstrate using the same name and the same code | symbol.

  The correction device 30 according to the first embodiment is mainly composed of a carry-in table 31, a correction device body 41, and a carry-out table 51. The track rails 11 to be corrected are placed on the carry-in table 31, sent one by one to the correction device body 41, corrected by the correction device body 41, and then transferred to the carry-out table 51. As a result, the track rail 11 having a desired straightness is shipped to the next process.

  The carry-in table 31 is provided with a motor 32 serving as a drive source for sending the track rail 11 to the correction device main body 41. A plurality of transport rollers installed on the loading table 31 are rotated by the motor 32 so that the track rail 11 can be moved. In addition, a displacement measuring unit 33 is installed in the immediate vicinity of the straightening device main body 41, and the displacement measuring unit 33 measures the amount of displacement over the entire length of the track rail 11 before correction sent to the straightening device main body 41. The The amount of displacement measured by the displacement measuring unit 33 is transmitted to a control computer (not shown) and used for improving the efficiency of the correction operation in the correction device main body 41.

  As shown in more detail in FIG. 3, the correction device main body 41 includes a freely movable arm member 42 having a rotation center α at an upper portion of the center thereof. At the tip of the arm member 42, a press roller 43 is installed as a presser that corrects the track rail 11 by applying a pressing force in contact with the track rail 11. The press roller 43 is installed in a freely rotatable state at the tip of the arm member 42. In the case of the first embodiment, the tip of the arm member 42 has a home position at 1 o'clock as shown in FIG. It is set to face the direction of the hour. However, the home position of the arm member 42 can be set to an arbitrary position within a range that does not hinder the movement of the track rail 11.

  Further, the arm member 42 can rotate about the rotation center α, and the rotation center α is configured to be movable in the vertical direction perpendicular to the axial direction of the track rail 11. That is, the arm member 42 can move in any vertical position while being movable in the vertical direction. Accordingly, the correction amount with respect to the track rail 11 is adjusted by moving the rotation center α according to the amount of pressing force applied to the track rail 11 and rotating the arm member 42 at the position of the desired rotation center α. It is possible. Further, when the arm member 42 performs the above-described operation, the press roller 43 installed at the tip of the arm member 42 is pressed against the track rail 11 while performing an arc motion. It is possible to apply a pressing force based on.

  Below the arm member 42, pinch rollers 44 and 44 for transporting the track rail 11 to be corrected, work clamps 45 and 45 for clamping the track rail 11, and a transport position of the track rail 11 are shown. A position detection encoder 46 for measurement is installed. A pair of pinch rollers 44 and 44 and work clamps 45 and 45 are installed on the upstream side and the downstream side of the arm member 42, respectively. Further, the two members of the pinch roller 44 and the work clamp 45 installed on each of the upstream and downstream sides move so that they can be moved and fixed at arbitrary positions in the transport direction of the track rail 11, that is, in the left-right direction in FIG. It is installed on the stands 47 and 47, respectively. In the case of the correction device main body 41 according to the first embodiment, the movable bases 47 and 47 can be manually moved and fixed, and the shape and material of the track rail 11 (axial workpiece) to be corrected. What is necessary is just to install in a preferable position according to the characteristics of these.

  In the case of the correction device main body 41 according to the first embodiment, a configuration is adopted in which the arm member 42 is rotationally moved above the track rail 11 and the press roller 43 is in surface contact with the upper surface of the track rail 11. . That is, since it is configured to exert a pressing force in the vertical direction from above the track rail 11 (axial workpiece), the pinch rollers 44 and 44 for conveying the track rail 11 are configured as side rollers. By pushing the side surface of the track rail 11 while avoiding the pressing force for correction, the track rail 11 can be transported without any trouble. The work clamps 45, 45 hold and fix the track rail 11 when a pressing force for correction is applied to the track rail 11, and correct the track rail 11 in cooperation with the press roller 43 that exerts the pressing force. Therefore, the upper and lower surfaces of the track rail 11 can be clamped and fixed. The position detection encoder 46 is installed further downstream of the work clamp 45 on the movable mount 47 installed on the downstream side, while avoiding the track rail 11 that receives a pressing force for correction. It is configured so as to be able to reliably measure the transport position of the track rail 11.

  Further, it is an intermediate lower position of the movable mounts 47, 47 (work clamps 45, 45) installed on the upstream and downstream sides, and below the arm member 42 installation position with respect to the material passing path of the track rail 11. A measurement sensor 48 is installed at the position. The measurement sensor 48 includes a contact 48 a that can freely contact and retreat with respect to the track rail 11, and measures the amount of distortion generated in the track rail 11 in a range clamped by work clamps 45 and 45. It is a device.

  Here, in the correction apparatus 30 according to the first embodiment, as described above, the displacement amount over the entire length of the track rail 11 before correction is measured in advance by the displacement measurement unit 33 included in the carry-in table 31. However, the amount of displacement is used to identify the position where the track rail 11 should be corrected and to find the correction location of the track rail 11. On the other hand, the amount of strain existing in the track rail 11 between the work clamps 45 and 45 measured by the measurement sensor 48 is used to find out how much the track rail 11 should be corrected. The position of the rotation center α of the arm member 42 is changed based on the measured strain amount, and the pressing force exerted on the track rail 11 is adjusted. Note that these operations are automatically controlled by a control computer (not shown), and the control computer (not shown) detects the displacement amount acquired by the displacement measurement unit 33, the strain amount measured by the measurement sensor 48, and the like. The position information of the track rail 11 detected by the position detection encoder 46 is acquired, and the operation control of each member included in the correction device 30 is performed according to the information. Note that a servo motor or the like is used as a drive source for the operation of each member provided in the correction device 30, and high-precision operation control is realized.

  The track rail 11 to be corrected is clamped and fixed at a predetermined position by work clamps 45 and 45, and is pressed by a press roller 43 that is pressed by surface contact while performing an arc motion on the upper side of the intermediate position. Therefore, the intermediate position of the clamp fixing portion that receives the correction pressing force moves downward, and the upstream side and the downstream side of the clamp fixing portion move upward. That is, the position clamped by the work clamps 45 and 45 is used as a fulcrum, and the track rail 11 is corrected in a bowed manner according to the pressing amount of the press roller 43. Such a correction operation does not give an excessive load to the correction object as compared with the technique of applying a correction load by vertical point contact as in the prior art, so that the effect of being difficult to wrinkle, for example, trajectory It is possible to exert a significant effect that it is difficult to cause a problem such as the rail 11 being bent or being excessively corrected and bent.

  The carry-out stand 51 is installed on the downstream side of the correction apparatus main body 41 according to the first embodiment described above. The carry-out stand 51 according to the first embodiment is configured as a free conveyor in which free rollers are arranged, receives the track rail 11 that has been corrected and is conveyed by the pinch rollers 44 and the like, and collects the next rail. I play a role to send to.

  Heretofore, the constituent members of the correction device 30 according to the first embodiment have been described. Next, operation | movement of the correction apparatus 30 which concerns on 1st embodiment is demonstrated.

  When the track rail 11 to be corrected is placed on the carry-in table 31, a plurality of transport rollers installed on the carry-in table 31 are rotated by the motor 32 provided in the carry-in table 31, and the track rails 11 are corrected one by one. It is sent out to the apparatus main body 41. At this time, the displacement measurement unit 33 installed at the most downstream position of the carry-in table 31 measures the displacement amount over the entire length of the track rail 11 before correction sent to the correction device body 41. Further, this displacement amount is transmitted to a control computer (not shown).

  A control computer (not shown) that has acquired the displacement measured by the displacement measuring unit 33 calculates which part of the track rail 11 should be corrected, and the position of the track rail 11 that performs the correction operation in the correction device body 41. And instructing the motor 32 provided in the carry-in base 31 and the pinch roller 44 provided in the correction device main body 41 to control the conveyance of the track rail 11 based on the result of the determination.

  Next, the correction device body 41 corrects the track rail 11 that has been transported while being transported (hereinafter, mainly refer to FIG. 3). The track rail 11 is stopped at a suitable position by detecting the position of the track rail 11 by the position detection encoder 46 and the control of the pinch roller 44 and the like, and the correction target position is positioned directly below the arm member 42. Then, a control computer (not shown) issues an operation command to the work clamps 45, 45 located upstream and downstream of the correction target portion, and the clamp is fixed in such a manner that the rollers sandwich the upper and lower surfaces of the track rail 11. The When the track rail 11 is clamped and fixed by the pair of work clamps 45, 45, the measurement sensor 48 causes the contact 48 a to contact and retract with respect to the track rail 11, and is generated in the track rail 11 in the clamped range. Measure the amount of distortion. The strain amount measured by the measurement sensor 48 is immediately transmitted to a control computer (not shown), and how much pressing force should be applied to the track rail 11 is calculated based on this strain amount. Based on the calculation result, the position of the rotation center α of the arm member 42 is changed, and the pressing force exerted on the track rail 11 is adjusted.

  When the position of the rotation center α of the arm member 42 is determined, the arm member 42 performs a rotational motion, and the press roller 43 installed at the tip of the arm member 42 is pressed against the track rail 11 while performing a circular motion. By such an operation, the pressing force based on the surface contact with the track rail 11 is applied.

  When correction by the press roller 43 is executed, a control computer (not shown) moves the track rail 11 based on the amount of displacement measured by the displacement measuring unit 33 and performs the above-described correction operation over the entire length of the track rail 11. Will be executed. When the correction is completed with the entire length of the track rail 11, the track rail 11 which has been corrected is sent to the carry-out stand 51, and the correction work by the correction device 30 is completed. In addition, after correction is completed with the full length of the track rail 11, the displacement amount of the track rail 11 can be confirmed by using the displacement measuring unit 33 to check the quality. In this case, if the amount of displacement of the track rail 11 satisfies a predetermined standard, the track rail 11 is unloaded to the carry-out stand 51 as it is, and if the amount of displacement of the track rail 11 does not satisfy the predetermined standard, the above-mentioned is performed again. The corrective action is performed.

  The correction device 30 according to the first embodiment has been described above. However, the correction apparatus of the present invention is not limited to the above contents, and various changes or improvements can be added.

  For example, in the correction device 30 according to the first embodiment described above, the press roller 43 is located above the track rail 11 and is configured to exert a pressing force in the vertical direction from above the track rail 11. It was. However, the press roller 43 is configured to be positioned on the side of the track rail 11 (that is, the direction perpendicular to the direction of penetration of the opening hole 11 b of the track rail 11), and horizontally from the side of the track rail 11. It can also be configured to exert a pressing force in the direction. In other words, the device configuration is such that the correction device 30 according to the first embodiment is laid down. With such an apparatus configuration, the direction of the pressing force for correction and the direction of gravity can be prevented from overlapping, and thus there is an advantage that the influence of gravity can be eliminated during the correction operation.

  Further, in the correction device 30 according to the first embodiment, the configuration in which the arm member 42 is rotated 360 ° is employed. However, the arm member 42 is configured to perform only the swing motion like a pendulum. (For example, within a range of 180 °). Even with the arm member 42 configured to perform only the swing motion, the same correction effect as that of the correction device 30 according to the first embodiment can be exhibited.

  Furthermore, in the correction device 30 according to the first embodiment, the device configuration of two work clamps 45, 45, and one arm member 42 and one measurement sensor 48 disposed between the two work clamps 45, 45. Has been described as an example. However, in the correction apparatus of the present invention, a large number of work clamps may be provided, and the arm member 42 and the measurement sensor 48 may be provided between the adjacent work clamps. That is, a large number of press rollers 43 for straightening work are arranged in series, and the straightening work is performed simultaneously and continuously on the long track rail 11 (axial workpiece) by using these many press rollers 43. May be.

  It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

[Correction device according to the second embodiment]
The correction device 30 according to the first embodiment described above includes only one press roller 43 as a presser that exerts a pressing force by surface contact on the track rail 11. Therefore, in the correction device 30 according to the first embodiment, the pressing force can be applied only from one direction (upward direction) to the track rail 11. The correction apparatus according to the second embodiment described next is provided with two press rollers as pressing elements that exert a pressing force due to surface contact on the track rail 11, and from two directions at the same time, or each of which is arbitrary. It has a configuration capable of exerting a pressing force at timing. In addition, about the correction apparatus which concerns on this 2nd embodiment, suppose that the structure and operation | movement are demonstrated with reference to FIGS. 5-9, and it is the same as that of the member demonstrated using FIGS. About a member, the same code | symbol may be attached | subjected and description may be abbreviate | omitted.

  Here, FIG. 5 is an external top view for explaining the overall configuration of the correction apparatus according to the second embodiment. FIG. 6 is a view for explaining the configuration of the carry-in base provided in the correction apparatus according to the second embodiment, where a part (a) shows a top view and a part (b) shows a front view. ing. Further, FIG. 7 is a three-sided view showing the configuration of the displacement measuring unit provided in the carry-in base shown in FIG. 6, where a part (a) shows a top view and a part (b) shows a left side. The figure (c) has shown the back view. Further, FIG. 8 is an external top view showing a correction device body included in the correction device according to the second embodiment, and FIG. 9 is a cross-sectional view taken along arrow A in FIG.

  The correction device 50 according to the second embodiment is mainly composed of a carry-in table 51, a correction device body 61, and a carry-out table 71. The track rails 11 to be corrected are placed on the carry-in table 51, sent one by one to the correction device main body 61, corrected by the correction device main body 61, and then transferred to the carry-out table 71. As a result, the track rail 11 having a desired straightness is shipped to the next process.

  The carry-in stand 51 according to the second embodiment is provided with a plurality of transport rollers 52, and the track rails 11 can be sent out to the correction device main body 61 by the rotation of the plurality of transport rollers 52. It is like that. In addition, as a characteristic configuration of the carry-in stand 51 according to the second embodiment, a self-propelled displacement measuring unit 53 is installed on the carry-in stand 51. The displacement measurement unit 53 is a member used as a measurement sensor in the second embodiment, and can travel on two rails 54 and 54 provided on the carry-in table 51. The detailed configuration of the displacement measuring unit 53 is as shown in FIG. 7, but the pinion 53b attached to the tip of the motor shaft of the AC servo motor 53a included in the displacement measuring unit 53 is one of the two rails 54 and 54. It is meshed with the rack formed. Further, the two rails 54 and 54 function as track rails for the linear guide, and the linear guide moving block 53c assembled to the rails 54 and 54 is installed on the lower surface of the displacement measuring unit 53. Smooth linear movement of the displacement measuring unit 53 on the two rails 54, 54 is realized.

  The displacement measuring unit 53 capable of self-running as described above includes roller pairs 53d and 53d capable of sandwiching both side surfaces of the track rail 11, as shown in a partial diagram (b) in FIG. is set up. The roller pairs 53d and 53d are members that exhibit the same function as the contact 48a in the first embodiment, can be driven by the air cylinder 53e, and sandwich both side surfaces of the track rail 11 by sandwiching the both side surfaces. The displacement (distortion) amount over the entire length of the track rail 11 to be corrected can be measured.

  In the carry-in stand 51 according to the second embodiment, the displacement (distortion) amount over the entire length of the track rail 11 before correction sent to the correction device main body 61 by the self-propelled displacement measurement unit 53 having the above-described configuration is measured. Is done. The amount of displacement (strain) measured by the displacement measuring unit 53 is transmitted to a control computer (not shown) and used for efficient correction operation control in the correction apparatus main body 61.

  As shown in more detail in FIG. 8, the correction device main body 61 includes moving mechanisms 62 and 62 each having a total of two press rollers 63 and 63, one on each of the left and right sides of the track rail 11 being conveyed. have. The moving mechanism 62 is grasped in the axial direction of the track rail 11 which is an axial workpiece (that is, the horizontal direction in the drawing in FIG. 8) and the orthogonal direction orthogonal to the axial direction (that is, the vertical direction in the drawing in FIG. 8). This is a member that is movable on a two-dimensional plane. The specific mechanism is shown in FIG. 8 and FIG. 9, and includes two linear guides 71 and 71 having track rails arranged in the axial direction and a ball screw connected to a motor 72 serving as a drive source. 73, the press roller 63 can be moved in the axial direction, and on the other hand, the linear guide 74 having a total of eight moving blocks, each of four upper and lower four rails arranged in the orthogonal direction, and the drive The press roller 63 can be moved in the orthogonal direction by a ball screw 76 connected to a motor 75 as a source. Since the press roller 63 according to the second embodiment is installed with respect to the moving mechanism 62 configured as described above, the first embodiment is obtained by combining the movement in the axial direction and the movement in the orthogonal direction. It is possible to perform the same arc motion as the press roller 43 attached to the arm member 42 described in the above. That is, the press roller 63 according to the second embodiment is also pressed against the track rail 11 while performing an arc motion similarly to the press roller 43 of the first embodiment. A pressing force based on surface contact can be applied.

  In the case of the press roller 63 according to the second embodiment, a pressing force can be applied from both the left and right directions of the drive rail 11 being conveyed, so that more efficient correction work can be performed. It has become.

  At a position facing the press roller 63, a pair of movable mounts 67, 67 that are movable and fixed in the axial direction are installed. Each of the movable mounts 67 includes a conveyance auxiliary roller 64 that supports the lower surface side of the drive rail 11 being conveyed, and a support member that supports the anti-press roller side of the drive rail 11 when the press roller 63 applies a pressing force. 68 is installed. The conveyance auxiliary roller 64 is configured as a free roller and plays a role of stably maintaining the conveyance level of the track rail 11. On the other hand, the support member 68 is a member that supports the track rail 11 when receiving a pressing force from the press roller 63 and plays a role of exerting a correction load on the track rail 11 in cooperation with the press roller 63. Note that the contact portion of the support member 68 with the track rail 11 is configured to be able to rotate following the side surface of the track rail 11 that is subjected to a pressing force from the press roller 63 and bends like a bow (see FIG. 8). With this configuration, the pressing force for correction applied to the track rail 11 from the press roller 63 is applied to the track rail 11 efficiently and without waste, so that a highly accurate correction operation can be realized. Is possible.

  The moving stands 67 and 67 can be moved and fixed manually by using a width adjusting handle 67b installed via a ball screw 67a installed on the moving stands 67 and 67. The track rail 11 (axial workpiece) to be corrected is configured to be installed at a preferred position in accordance with the characteristics such as the shape and material of the track rail 11.

  In the correction device 50 according to the second embodiment, when the press roller 63 is driven, the displacement (distortion) measured by the displacement measurement unit 53 without using the measurement sensor 48 used in the first embodiment. The press roller 63 (moving mechanism 62) is operated based on the amount. This was adopted in order to realize an efficient straightening operation by taking full advantage of the fact that the straightening device 50 according to the second embodiment has two press rollers 63 (moving mechanisms 62). This is a configuration, which was adopted in order to reduce the amount of strain by operating two press rollers 63 (moving mechanism 62) at a time based on the displacement (strain) amount measured first.

  In the correction device 50 according to the second embodiment, the operation control of each component is automatically performed by a control computer (not shown), and the control computer (not shown) performs the displacement measurement unit 53. The amount of displacement (distortion) acquired by this, the position information of the track rail 11 detected by an encoder (not shown), etc. are acquired, and the operation control of each member provided in the correction device 50 is performed based on these information. Has been done.

  On the downstream side of the correction apparatus main body 61 according to the second embodiment described above, a carry-out stand 71 is installed. The carry-out stand 71 according to the second embodiment is configured as a free conveyor in which free rollers are arranged, and receives and collects the track rails 11 that have been transported after the correction in the correction device main body 61, and then collects the next. It plays the role of sending it out to the process.

  The constituent members of the correction device 50 according to the second embodiment have been described above. Next, operation | movement of the correction apparatus 50 which concerns on 2nd embodiment is demonstrated.

  When the track rail 11 to be corrected is placed on the carry-in table 51, the plurality of transport rollers 52 installed on the carry-in table 51 rotate to send the track rails 11 one by one to the correction device main body 61. At this time, the displacement (strain) amount over the entire length of the track rail 11 before correction sent to the correction device main body 61 is measured by the self-propelled displacement measurement unit 53. The amount of displacement (distortion) is transmitted to a control computer (not shown).

  A control computer (not shown) that has acquired the amount of displacement (strain) measured by the displacement measuring unit 53 calculates how much of which part of the track rail 11 should be corrected, and performs a correction operation in the correction device main body 61. The position of the track rail 11 and the correction amount are determined, and a transport command for the track rail 11 is transmitted to a transport system member such as the transport roller 52 based on the index result.

  Next, the correction device body 61 corrects the track rail 11 that has been transported while being transported (hereinafter, mainly refer to FIG. 8). Based on the amount of displacement (strain) measured by the displacement measurement unit 53, the moving mechanism 62 presses the press roller 63 against the track rail 11 while moving it in an arc, and corrects the pressing force based on surface contact with the track rail 11. The action is executed. At this time, since the two moving mechanisms 62 correct both side surfaces of the track rail 11 simultaneously or separately, very efficient correction work is performed.

  When the correction is completed with the entire length of the track rail 11, the track rail 11 that has been corrected is sent to the carry-out stand 71, and the correction work by the correction device 50 is completed. In addition, after correction is completed with the full length of the track rail 11, the displacement (strain) amount of the track rail 11 can be confirmed again by using the displacement measuring unit 53 to confirm the quality. In this case, if the amount of displacement (strain) of the track rail 11 satisfies a predetermined standard, the track rail 11 is directly carried out to the carry-out stand 71, and the amount of displacement (strain) of the track rail 11 satisfies the predetermined standard. If not, the correction operation described above is executed again.

  The correction device 50 according to the second embodiment has been described above. However, the correction apparatus of the present invention is not limited to the above contents, and various changes or improvements can be added.

  For example, in the correction device 50 according to the above-described second embodiment, the press roller 63 is located on the side of the track rail 11 and exerts a pressing force in the horizontal direction from the side of the track rail 11. Was composed. According to such a configuration, the direction of the pressing force for correction and the direction of gravity can be prevented from overlapping, so that the influence of gravity can be eliminated during the correction operation. However, the press roller 63 according to the second embodiment is configured to be positioned above and below the track rail 11 and configured to exert a pressing force in the vertical vertical direction from above and below the track rail 11. May be.

  The press rollers 43 and 63 can also be configured to exert a pressing force from an oblique direction with an angle with respect to the track rail 11.

  Furthermore, in the correction device 50 according to the second embodiment, the configuration using the two press rollers 63 installed in the two moving mechanisms 62 is exemplified, but the number of press rollers installed may be singular or plural. Any configuration can be adopted.

  Therefore, for example, by arranging the press rollers in all directions such as up, down, left and right of the shaft-like workpiece, it is possible to realize a correction device that can correct any distortion in any direction.

  Further, in the first and second embodiments described above, the press rollers 43 and 63 are described as examples of the presser for correcting the shaft-like workpiece. However, the presser of the present invention is the same as the press rollers 43 and 63. Any form may be adopted as long as the above-described effects can be exhibited. For example, instead of rollers that are in rolling contact with the shaft workpiece such as the press rollers 43 and 63, rigid members such as a stator having an arcuate surface that is in sliding contact with the shaft workpiece are pressed. It can also be.

  Furthermore, the apparatus configuration and operation method described in the first and second embodiments described above are arbitrary according to the conditions such as the shape and material of the shaft-like workpiece, or according to the installation restrictions and cost restrictions of the equipment. Can be changed. It is a condition that the press roller, which is a feature of the present invention, is a correction device configured to exert a pressing force based on surface contact on the shaft-shaped workpiece by being pressed against the shaft-shaped workpiece while performing an arc motion. As described above, various modifications and control methods can be changed.

  Furthermore, the shaft-like workpiece that can be corrected by the correction device according to the present invention is not limited to the track rail 11 described above. As long as the press roller can exert a pressing force based on the surface contact, the shaft-like workpiece may be anything.

  It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.

  DESCRIPTION OF SYMBOLS 10 Motion guide apparatus, 11 Track rail, 11a Rolling element rolling groove, 12 Ball, 13 Moving block, 13c Load rolling element rolling groove, 22 Load rolling element rolling path, 23 Unloaded rolling element rolling path, 25 direction switching path , 30, 50 Correction device, 33, 53 Displacement measurement unit, 42 Arm member, 43, 63 Press roller, 45 Work clamp, 48 Measurement sensor, 48a Contact, 62 Moving mechanism.

Claims (4)

A plurality of work clamps for clamping and fixing a shaft-like work at a plurality of points in the axial direction;
A measurement sensor that measures the amount of strain of the shaft-shaped workpiece by including a contactor that can freely contact and retract with respect to the shaft-shaped workpiece;
A pressing element that corrects the shaft-shaped workpiece in cooperation with the workpiece clamp by exerting a pressing force on the shaft-shaped workpiece based on the amount of strain measured by the measurement sensor;
A correction device comprising:
The pressing element is installed on an arm member that can freely rotate or swing, and exerts a pressing force based on surface contact on the axial workpiece by being pressed against the axial workpiece while performing an arc motion. A correction device characterized by that. The correction device according to claim 1 ,
The correction device, wherein the pressing element is configured to exert the pressing force in a vertical direction from above the shaft-like workpiece. The correction apparatus according to claim 1 or 2 ,
The correction device, wherein the pressing element is configured to exert the pressing force in a horizontal direction from a side of the shaft-like workpiece. A track member;
A movable body that is movably attached to the track member via a plurality of rolling elements;
Have
The plurality of rolling elements are formed on the moving body so as to connect a loaded rolling path formed between the raceway member and the moving body and one end and the other end of the loaded rolling path. In the motion guide device installed in an infinite circuit consisting of a runway,
The motion guide device, wherein the track member is a shaft-like workpiece that has been subjected to straightening processing by the straightening device according to any one of claims 1 to 3 .

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