Cylindrical workpiece contour correction device

Abstract

To provide a cylindrical workpiece contour correction device which can highly accurately correct an outer shape of cylindrical workpiece without breaking the cylindrical workpiece.SOLUTION: A cylindrical workpiece contour correction device includes: an upper member having a first horizontal surface; a lower member having a second horizontal surface facing the first horizontal surface; a grinding surface provided on at least one of the first horizontal surface and the second horizontal surface load applying means for applying a load in a direction to the cylindrical workpiece arranged between the first horizontal surface and the second horizontal surface, to at least one of the upper member and the lower member; and driving means for reciprocating at least one of the upper member and the lower member in a rolling direction of the cylindrical workpiece arranged between the first horizontal surface and the second horizontal surface.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an apparatus for modifying the outer shape of a cylindrical workpiece. [Background technology]

[0002] For example, Patent Document 1 below discloses a technique for polishing the surface of a cylindrical workpiece (monolith-type separation column) by placing the cylindrical workpiece between two rotating grindstones and pressing a blade against the workpiece. Patent Document 2 below discloses a technique for polishing the surface of a cylindrical workpiece by sandwiching the cylindrical workpiece (cylindrical ceramics) between two flat grindstones and rotating the workpiece by vibration. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5117091 [Patent Document 2] Japanese Patent Application Publication No. 09-225814 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the technique disclosed in Patent Document 1 has a problem that if the cylindrical workpiece has a large warp, the cylindrical workpiece is sandwiched between the rotating grindstones and breaks. Also, the technique disclosed in Patent Document 2 has a problem that if the cylindrical workpiece has a large warp, the cylindrical workpiece does not rotate and only a specific surface is ground. For this reason, the techniques disclosed in Patent Documents 1 and 2 cannot modify the outer shape of the cylindrical workpiece with high precision without breaking the cylindrical workpiece. [Means for solving the problem]

[0005] An apparatus for correcting the outer shape of a cylindrical workpiece according to one embodiment includes an upper member having a first horizontal surface, a lower member having a second horizontal surface opposite the first horizontal surface, a grinding surface provided on at least one of the first horizontal surface and the second horizontal surface, a load application means for applying a load to at least one of the upper and lower members in a direction toward a cylindrical workpiece positioned between the first and second horizontal surfaces, and a drive means for moving at least one of the upper and lower members back and forth along the rolling direction of a cylindrical workpiece positioned between the first and second horizontal surfaces. Effect of the Invention

[0006] According to one embodiment, a cylindrical workpiece outer shape correction device can be provided that can correct the outer shape of a cylindrical workpiece with high precision without breaking the cylindrical workpiece. [Brief description of the drawings]

[0007] [Figure 1] FIG. 1 is a diagram showing a configuration of a cylindrical workpiece outer shape correction device according to an embodiment; [Diagram 2] FIG. 1 is a diagram showing an operation of a cylindrical workpiece outer shape correction device according to an embodiment; [Diagram 3] FIG. 1 is a diagram showing the dimensions and state of a cylindrical workpiece according to an embodiment; [Figure 4] FIG. 13 is a diagram showing the operation of a cylindrical workpiece outer shape correction device according to a modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] An embodiment will be described below with reference to the drawings. For convenience, in each embodiment described below, the X-axis direction and the Y-axis direction are horizontal, and the Z-axis direction is vertical (up-down direction). However, the horizontal movement direction of the lower moving plate 104 provided in the cylindrical workpiece outer shape correcting device 100 is the X-axis direction.

[0009] (Configuration of cylindrical workpiece outer shape correction device 100) Fig. 1 is a diagram showing the configuration of a cylindrical workpiece outer shape correction device 100 according to one embodiment. The cylindrical workpiece outer shape correction device 100 shown in Fig. 1 is a device that can correct the outer shapes of multiple cylindrical workpieces 10 with high precision without breaking the multiple cylindrical workpieces 10.

[0010] The cylindrical workpiece 10 is a ceramic rod having a porous structure, and is used, for example, as a column for HPLC (High Performance Liquid Chromatography) analysis. HPLC analysis is an analysis method for separating and analyzing a plurality of substances contained in a liquid flowing inside a column based on the difference in the moving speed of each substance in the liquid. In HPLC analysis, a recess for installing the cylindrical workpiece 10 is formed in a plate, and it is preferable that the cylindrical workpiece 10 has a highly accurate cylindrical shape so that the cylindrical workpiece 10 can be fitted into the recess without any gaps. The cylindrical workpiece outer shape correction device 100 according to one embodiment is a device that can correct the outer shape of the cylindrical workpiece 10 to a highly accurate cylindrical shape by correcting the outer shape defects (diameter defects, warping, etc.) and appearance defects (scratches, dents, etc.) of the cylindrical workpiece 10.

[0011] In other words, the cylindrical workpiece outer shape correction device 100 of one embodiment is a device that not only polishes the outer peripheral surface of the cylindrical workpiece 10 to smooth the outer peripheral surface, but also corrects the outer shape of the cylindrical workpiece 10 by polishing the outer peripheral surface of the cylindrical workpiece 10 while rolling the cylindrical workpiece 10.

[0012] As shown in FIG. 1, the cylindrical workpiece outer shape modifying device 100 includes a base 102, a stage 103, a lower moving plate 104, an upper pressing plate 106, an arm 108, a gap adjusting means 110, a weight 112, a control device 120, and a user interface unit 130.

[0013] The base 102 supports each component of the cylindrical workpiece outer shape modifying device 100. An upper surface 102A of the base 102 is a horizontal plane parallel to the XY plane.

[0014] The stage 103 is an example of a "driving means." The stage 103 reciprocates in the horizontal movement direction (X-axis direction) by driving a motor or the like while holding the lower moving plate 104 on the upper surface 102A of the base 102. As a result, the stage 103 reciprocates the lower moving plate 104 along the X-axis direction (the rolling direction of the cylindrical workpiece 10).

[0015] The lower moving plate 104 is an example of a "lower member" and is a horizontal flat plate-like member held by the stage 103. The lower moving plate 104 is held by the stage 103 so that its upper surface 104A (an example of a "second horizontal surface") is a horizontal surface parallel to the XY plane. As a result, the lower moving plate 104 reciprocates in the horizontal movement direction (X-axis direction) together with the stage 103. As a result, the lower moving plate 104 reciprocates the cylindrical workpiece 10 placed in the gap 100A between the upper pressing plate 106 and the lower moving plate 104 while rolling in the X-axis direction. A lower abrasive paper 105 is provided on the upper surface 104A of the lower moving plate 104. The lower abrasive paper 105 is an example of a "grinding surface" and grinds the outer peripheral surface of the cylindrical workpiece 10 as the cylindrical workpiece 10 reciprocates in the gap 100A. For example, the lower abrasive paper 105 is attached to the upper surface 104A by an adhesive.

[0016] The upper pressing plate 106 is an example of an "upper member" and is a horizontal flat plate-like member provided above the lower moving plate 104 and facing the lower moving plate 104. The lower surface 106A of the upper pressing plate 106 is an example of a "first horizontal plane" and is a horizontal plane parallel to the XY plane. That is, the lower surface 106A of the upper pressing plate 106 faces the upper surface 104A of the lower moving plate 104 and is parallel to the upper surface 104A of the lower moving plate 104. The upper pressing plate 106 presses the cylindrical workpiece 10 arranged in the gap 100A between the upper pressing plate 106 and the lower moving plate 104 from above by the weight of the upper pressing plate 106 and the total weight of the weight 112 placed on the upper surface 106B of the upper pressing plate 106. Upper abrasive paper 107 is provided on the lower surface 106A of the upper pressure plate 106. The upper abrasive paper 107 is an example of an "abrasive surface" and polishes the outer circumferential surface of the cylindrical workpiece 10 as the cylindrical workpiece 10 moves back and forth in the gap 100A. For example, the upper abrasive paper 107 is attached to the lower surface 106A by an adhesive.

[0017] The arm 108 is provided on the upper surface 102A of the base 102. The arm 108 supports the upper pressure plate 106 so as to be movable in the vertical direction (Z-axis direction). In the example shown in FIG. 1, the arm 108 is configured to have a support part 108A and a rotating part 108B. The support part 108A is a column-shaped part that stands vertically upward (Z-axis positive direction) from the upper surface 102A of the base 102. The rotating part 108B is an arm-shaped part that is rotatably supported by the upper end part of the support part 108A. The rotating part 108B suspends the upper pressure plate 106 from above by its tip part. The rotating part 108B can move the upper pressure plate 106 in the vertical direction (Z-axis direction) by rotating.

[0018] The gap adjustment means 110 is interposed between the lower surface 106A of the upper press plate 106 and the upper surface 104A of the lower moving plate 104, thereby defining the minimum gap width of the gap 100A between the lower surface 106A and the upper surface 104A to a predetermined size. In the example shown in FIG. 1, rollers 110A having a predetermined diameter are provided at both ends of the upper press plate 106 in the X-axis direction as the gap adjustment means 110. In the example shown in FIG. 1, the lower end of the roller 110A lands on the upper surface of the lower moving plate 104, thereby adjusting the minimum gap width of the gap 100A to a predetermined size. The minimum gap width of the gap 100A is set to approximately the same size as the target size so that the diameter of the cylindrical workpiece 10 after polishing becomes the target size. The position of the roller 110A can be adjusted in the vertical direction (Z-axis direction) relative to the upper press plate 106. The cylindrical workpiece contour correcting device 100 according to one embodiment can adjust the minimum gap width of the gap 100A by adjusting the vertical position of the roller 110A. However, this is not limited to the above, and for example, the cylindrical workpiece contour correcting device 100 according to one embodiment may be capable of adjusting the minimum gap width of the gap 100A by mounting rollers 110A with different diameters on the upper pressing plate 106.

[0019] The weight 112 is placed on the upper surface 106B of the upper pressure plate 106. The weight 112 applies a load downward (Z-axis negative direction) to the upper pressure plate 106. For example, a weight (e.g., a weight) made of a metal material is used as the weight 112. In the example shown in FIG. 1, the cylindrical workpiece outer shape correcting device 100 includes two weights 112 so that the load applied from the upper pressure plate 106 to the cylindrical workpiece 10 becomes a target load. However, this is not limited to this, and the cylindrical workpiece outer shape correcting device 100 may include one or three or more weights 112 so that the load applied from the upper pressure plate 106 to the cylindrical workpiece 10 becomes a target load. In other words, the cylindrical workpiece outer shape correcting device 100 can adjust the load applied from the upper pressure plate 106 to the cylindrical workpiece 10 by adjusting the total weight of the weights 112. The load applied from the upper pressure plate 106 to the cylindrical workpiece 10 is the sum of the total weight of the weights 112 and the weight of the upper pressure plate 106 itself.

[0020] The control device 120 controls the operation of the stage 103. For example, the control device 120 controls the start, stop, movement speed, movement distance, operation time, operation count, etc. of the horizontal movement operation of the stage 103. The control device 120 can control the operation of the stage 103 according to a control program. For example, the control device 120 can stop the operation of the stage 103 when the operation time or operation count of the stage 103 reaches a predetermined operation time or a predetermined operation count according to the control program. Also, for example, the control device 120 can change the movement speed of the stage 103 in stages according to the control program. The control device 120 is configured with a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), etc. Each function of the control device 120 described above is realized, for example, by the CPU executing a program stored in the ROM in the control device 120.

[0021] The user interface unit 130 performs input and output for the operator of the cylindrical workpiece outer shape correcting device 100. In the example shown in FIG. 1, the user interface unit 130 has a counter 131, a speedometer 132, a start button 133, and a stop button 134. The counter 131 displays the number of horizontal movements of the lower moving plate 104. The speedometer 132 displays the horizontal movement speed of the lower moving plate 104. When the start button 133 is pressed by the operator, it outputs an operation start signal for the horizontal reciprocating movement operation of the lower moving plate 104 to the control device 120. When the stop button 134 is pressed by the operator, it outputs an operation stop signal for the horizontal reciprocating movement operation of the lower moving plate 104 to the control device 120.

[0022] (Correction process for cylindrical workpiece 10) Next, a process of a cylindrical workpiece 10 correction operation using the cylindrical workpiece outer shape correction device 100 according to one embodiment will be described with reference to Fig. 2. Fig. 2 is a diagram showing the operation of the cylindrical workpiece outer shape correction device 100 according to one embodiment.

[0023] First, the worker lifts the upper pressure plate 106 upward and places multiple cylindrical workpieces 10 in a line in the rolling direction (X-axis direction) on the upper surface 104A of the lower movable plate 104 (the area where the lower abrasive paper 105 is provided).

[0024] Next, as shown in Fig. 2(a), the worker places the upper press plate 106 on the multiple cylindrical workpieces 10. The worker also places the weight 112 on the upper surface 106B of the upper press plate 106. As a result, as shown in Fig. 2(a), the multiple cylindrical workpieces 10 are pressed from above by the upper press plate 106, and are sandwiched between the upper surface 104A of the lower moving plate 104 and the lower surface 106A of the upper press plate 106 due to the load of the weight of the upper press plate 106 and the weight of the weight 112.

[0025] Next, the operator presses the start button 133 (see FIG. 1) of the cylindrical workpiece outer shape modifying device 100 to instruct the start of the horizontal reciprocating movement of the stage 103. The operator can set in advance the operation speed, number of operations, operation time, etc. of the horizontal reciprocating movement of the stage 103 for the cylindrical workpiece outer shape modifying device 100.

[0026] 2(b), in response to a start command from an operator, the stage 103 starts a horizontal reciprocating movement in the X-axis direction at a preset operating speed under the control of the control device 120 (see FIG. 1). Accordingly, the lower moving plate 104 held by the stage 103 starts a horizontal reciprocating movement in the X-axis direction together with the stage 103.

[0027] As shown in FIG. 2(b), the horizontal reciprocating movement of the lower moving plate 104 causes the multiple cylindrical workpieces 10 to reciprocate while rolling in the X-axis direction in the gap 100A between the lower moving plate 104 and the upper pressing plate 106. While the multiple cylindrical workpieces 10 are reciprocating while rolling in the X-axis direction, their outer circumferential surfaces are polished by the lower abrasive paper 105 provided on the upper surface 104A of the lower moving plate 104 and the upper abrasive paper 107 provided on the lower surface 106A of the upper pressing plate 106. At this time, the outer circumferential surfaces of the multiple cylindrical workpieces 10 are polished efficiently by the load of the weight of the upper pressing plate 106 and the weight of the weight 112. The amount of movement of the lower moving plate 104 in the X-axis direction of the stage 103 is controlled by the control device 120 so that each cylindrical workpiece 10 rotates one or more times. As a result, the cylindrical workpiece outer shape correction device 100 of one embodiment can polish the outer peripheral surface of each cylindrical workpiece 10 along its entire circumference, thereby suppressing uneven wear on the outer peripheral surface of each cylindrical workpiece 10.

[0028] The stage 103 ends its horizontal reciprocating movement operation when a preset number of operations or a preset operation time is reached under the control of the control device 120 (see FIG. 1). However, the operation of the stage 103 may also be ended by an operator pressing a stop button 134. While the stage 103 and the lower moving plate 104 are performing the horizontal reciprocating movement operation, the multiple cylindrical workpieces 10 repeatedly reciprocate while rolling in the X-axis direction, and the outer circumferential surfaces are gradually polished.

[0029] Then, as shown in FIG. 2(c), when the stage 103 and the lower moving plate 104 finish the horizontal reciprocating movement, the cylindrical workpieces 10 have a highly accurate cylindrical shape with a predetermined diameter (≈minimum gap width of the gap 100A defined by the roller 110A) after the external shape defects and external appearance defects are corrected. For example, FIG. 2(c) shows an example in which one cylindrical workpiece 10 is corrected from a warped state to a non-warped state. To achieve this, in the cylindrical workpiece external shape correction device 100 according to one embodiment, the operation time of the stage 103, the number of operations, the load applied to the cylindrical workpieces 10 (i.e., the weight of the weight 112), the grain size of the upper abrasive paper 107 and the lower abrasive paper 105, etc. can be appropriately set in advance based on test results, simulation results, etc.

[0030] In addition, the operator may temporarily stop the operation of stage 103 midway through the operation of stage 103 and replace the upper abrasive paper 107 and the lower abrasive paper 105, thereby gradually changing the grain size of the upper abrasive paper 107 and the lower abrasive paper 105 to become finer.

[0031] Furthermore, the cylindrical workpiece outer shape correcting device 100 may change the moving speed of the stage 103 in stages according to an instruction from an operator or a control program. For example, the cylindrical workpiece outer shape correcting device 100 may increase the moving speed of the stage 103 in stages so that the moving speed of the stage 103 increases as the accuracy of the cylindrical workpiece 10 increases.

[0032] (Example of correction work for cylindrical workpiece 10) Fig. 3 is a diagram showing the dimensions and state of a cylindrical workpiece 10 according to an embodiment. Fig. 3(a) shows the dimensions and state of two cylindrical workpieces 10 before a correction operation using a cylindrical workpiece outer shape correction device 100 according to an embodiment. Fig. 3(b) shows the dimensions and state of two cylindrical workpieces 10 after a correction operation using a cylindrical workpiece outer shape correction device 100 according to an embodiment.

[0033] As shown in FIG. 3(a), before the correction work using the cylindrical workpiece outer shape correction device 100, both of the two cylindrical workpieces 10A and 10B have outer shape defects (warping and diameter variations) and appearance defects (scratches and dents).

[0034] On the other hand, as shown in FIG. 3(b), after the correction work using the cylindrical workpiece outer shape correction device 100, the two cylindrical workpieces 10A, 10B have their outer surfaces polished by the cylindrical workpiece outer shape correction device 100, so that defects in outer shape (warping and diameter variations) and defects in appearance (scratches and dents) are eliminated, i.e., they have a highly accurate cylindrical shape with a specified diameter.

[0035] As described above, the cylindrical workpiece outer shape correction device 100 of one embodiment comprises an upper pressure plate 106 having a lower surface 106A (first horizontal surface), a lower movable plate 104 having an upper surface 104A (second horizontal surface) opposite the lower surface 106A, upper abrasive paper 107 and lower abrasive paper 105 (abrasive surfaces) provided on the lower surface 106A and upper surface 104A, a weight 112 (load application means) that applies a load to the upper pressure plate 106 toward the cylindrical workpiece 10 arranged between the lower surface 106A and the upper surface 104A, and a stage 103 (driving means) that moves the lower movable plate 104 back and forth along the rolling direction of the cylindrical workpiece 10 arranged between the lower surface 106A and the upper surface 104A.

[0036] As a result, the cylindrical workpiece outer shape correcting device 100 according to one embodiment can reciprocate the cylindrical workpiece 10 while rolling, and during this, the outer peripheral surface of the cylindrical workpiece 10 is gradually polished, gradually eliminating defects in the outer diameter and appearance of the cylindrical workpiece 10, and the cylindrical workpiece 10 can have a highly accurate cylindrical shape with a predetermined diameter. Therefore, according to the cylindrical workpiece outer shape correcting device 100 according to one embodiment, the outer shape of the cylindrical workpiece 10 can be corrected with high accuracy without breaking the cylindrical workpiece 10.

[0037] (Modification) Next, a modified example of the cylindrical workpiece shape modifying device 100 according to the embodiment will be described with reference to Fig. 4. Fig. 4 is a diagram showing the operation of a cylindrical workpiece shape modifying device 100-2 according to the modified example.

[0038] 4, the cylindrical workpiece outer shape correcting device 100-2 according to one modification differs from the cylindrical workpiece outer shape correcting device 100 in that the upper press plate 106 moves back and forth horizontally, the lower abrasive paper 105 is not provided, and the gap adjustment means 110 has a columnar stopper 110B provided protruding upward from the upper surface 104A of the lower moving plate 104. In the cylindrical workpiece outer shape correcting device 100-2 according to one modification, the control device 120 controls the horizontal reciprocating movement of the upper press plate 106.

[0039] The stopper 110B determines the minimum gap width of the gap 100A by abutting its upper end against the lower surface 106A of the upper pressure plate 106. The amount by which the stopper 110B protrudes upward from the upper surface 104A of the lower moving plate 104 is adjustable. The cylindrical workpiece outer shape correcting device 100-2 according to one modified example is capable of adjusting the minimum gap width of the gap 100A by adjusting the amount by which the stopper 110B protrudes.

[0040] In the cylindrical workpiece outer shape correcting device 100-2 according to one modification, as shown in FIG. 4(b), the upper press plate 106 horizontally reciprocates in the X-axis direction, and the cylindrical workpieces 10 reciprocate while rolling in the X-axis direction in the gap 100A between the lower moving plate 104 and the upper press plate 106. Then, while the cylindrical workpieces 10 reciprocate while rolling in the X-axis direction, the outer peripheral surfaces are polished by the upper abrasive paper 107 provided on the lower surface 106A of the upper press plate 106. At this time, the upper press plate 106 is controlled by the control device 120 to move the cylindrical workpieces 10 in the X-axis direction by one or more rotations. As a result, the cylindrical workpiece outer shape correcting device 100-2 according to one modification can polish the outer peripheral surface of each cylindrical workpiece 10 over the entire circumference, and thus can suppress uneven wear of the outer peripheral surface of each cylindrical workpiece 10.

[0041] In the cylindrical workpiece outer shape correcting device 100-2 according to one modification, as shown in FIG. 4(c), when the upper press plate 106 finishes the horizontal reciprocating movement, the outer shape defects, appearance defects, etc. of the multiple cylindrical workpieces 10 are corrected, and the workpieces have a high-precision cylindrical shape having a predetermined diameter (≈minimum gap width of the gap 100A defined by the stopper 110B). For example, FIG. 4(c) shows an example in which one cylindrical workpiece 10 is corrected from a warped state to a non-warped state. To achieve this, in the cylindrical workpiece outer shape correcting device 100-2 according to one modification, the operation time and number of operations of the upper press plate 106, the grain size of the upper abrasive paper 107, etc. can be appropriately set in advance based on test results, simulation results, etc.

[0042] Although one embodiment of the present invention has been described in detail above, the present invention is not limited to these embodiments, and various modifications and changes are possible within the scope of the gist of the present invention described in the claims.

[0043] For example, in one embodiment of the cylindrical workpiece outer shape correction device 100, the upper pressure plate 106 may move back and forth horizontally, the lower moving plate 104 may move back and forth horizontally, or both the upper pressure plate 106 and the lower moving plate 104 may move back and forth horizontally.

[0044] Also, for example, the “load application means” may apply a load to the upper pressing plate 106, may apply a load to the lower moving plate 104, or may apply a load to both the upper pressing plate 106 and the lower moving plate 104. Also, the “load application means” is not limited to the weight 112. [Explanation of symbols]

[0045] 10 Cylindrical workpiece 100,100-2 Cylindrical workpiece contour correction device 100A gap 102 Base 102A Top 103 Stage 104 Lower moving plate 104A Top 105 Lower abrasive paper 106 Upper pressure plate 106A Bottom side 106B Top surface 107 Upper abrasive paper 108 Arm 108A Post section 108B Rotating part 110 Gap adjustment means 110A Roller 110B Stopper 112 Weight 120 Control device 130 User Interface Section 131 Counter 132 Speedometer 133 Start button 134 Stop button

Claims

1. an upper member having a first horizontal surface; a lower member having a second horizontal surface opposite the first horizontal surface; a grinding surface provided on at least one of the first horizontal surface and the second horizontal surface; a load applying means for applying a load to at least one of the upper member and the lower member in a direction toward a cylindrical workpiece disposed between the first horizontal plane and the second horizontal plane; a driving means for reciprocating at least one of the upper member and the lower member along a rolling direction of the cylindrical workpiece disposed between the first horizontal plane and the second horizontal plane; A gap adjusting means is further provided for adjusting a minimum gap width between the first horizontal surface and the second horizontal surface to a predetermined size, A cylindrical workpiece contour modification device characterized in that the gap adjustment means has a contact means provided on one of the upper member and the lower member and abutting the other of the upper member and the lower member.

2. A cylindrical workpiece outer shape correction device as described in claim 1, characterized in that the abutment means is a roller.

3. The load adding means is 3. The cylindrical workpiece outer shape modification device according to claim 1, wherein the load is applied to at least one of the upper member and the lower member in a manner that allows the load to be advanced and retreated in a vertical direction.

4. The driving means is 4. The cylindrical workpiece contour correction device according to claim 1, wherein at least one of the upper member and the lower member is reciprocated so that the cylindrical workpiece rotates one or more revolutions.

5. The upper member is The support is supported so as to be movable in the vertical direction, The load adding means is 5. The cylindrical workpiece contour correction device according to claim 1, further comprising a weight provided on the upper member.

6. The driving means is The lower member is reciprocated along the rolling direction of the cylindrical workpiece.

6. The cylindrical workpiece outer shape correction device according to claim 5.

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