JP3170875U - Spinning jig - Google Patents

Abstract

A processing jig capable of performing high-precision spinning without using a mold is provided. A columnar guide shaft that extends a main shaft of a spinning machine, a workpiece fixing portion that is provided at a tip of the guide shaft and sandwiches a metal workpiece between a tail bar and the guide shaft. And a plurality of rail portions 16 provided in parallel with the main shaft. Further, a plurality of linear guides movable along the rail member in parallel with the main shaft, a work support disc 18 supported by the linear guide so that the outer periphery of the guide shaft can move in parallel with the main shaft, and a backup A backup roller receiving ring 20 in contact with the roller 19 is provided. With this configuration, when the processing force by the processing roller is applied to the metal workpiece, the resistance force by the backup roller is transmitted to the workpiece support disk via the backup roller receiving ring, and the work back surface is transferred by the workpiece support disk. Prevents deformation of the workpiece by supporting it. [Selection] Figure 1

Description

  The present invention relates to a spinning jig that enables high-precision spinning without using a mold.

Spinning using a conventional mold is a plastic working method in which a work 2 is clamped and fixed to a rotating mold 1 attached to a main shaft with a tailstock 3 and then pressed against the mold 1 with a processing roller 4. (See FIG. 9).
Various spinning techniques that do not use dies have been proposed. For example, Patent Document 1 (Japanese Patent Laid-Open No. 2009-297787) discloses a method of increasing the rigidity of a workpiece by bending the edge of a plate blank in a spinning process that does not use a mold.
Non-Patent Document 1 (Kawai, K., Yang, LN, Kudo, H., 2001. A flexible shear spinning of truncated conical shells with a general-purpose mandrel. Journal of Materials Processing Technology 113 (1-3), 28-33.) Discloses a spinning process in which a workpiece is simply sandwiched between a jig and a mandrel without using a mold.
Further, as shown in Non-Patent Document 1, by forming the work roller 4 against the work 2 in a state where the work 2 is simply sandwiched between the jig 5 and the tailstock 3 without using a metal mold. Various shapes can be formed without preparing various molds (FIG. 8).

JP 2009-297787 A

Journal of Materials Processing Technology, 2001

  However, as shown in Non-Patent Document 1, when forming the work 2 with the work roller 4 in a state where the work 2 is floated and rotated without preparing a mold, the part of the work 2 that has been formed with the work force. Is elastically deformed and an accurate shape cannot be formed (FIG. 7A). In addition, an error from the target shape occurs due to the return of elastic deformation after processing (FIG. 7B). Such distortion becomes more prominent as it approaches the periphery of the molded product. In particular, in the case of a thin material or a workpiece having a large size, there is a drawback that the shape accuracy is greatly reduced.

  Moreover, as shown in FIG. 6, by bending the edge 2a of the plate blank (work) in advance, the rigidity of the work 2 can be increased and deformation during processing can be suppressed to some extent. There is a problem that the number of processing steps increases because it is necessary. Further, when the tip radius ra of the jig 5 is smaller than the diameter R of the workpiece 2, a moment due to the processing force is applied to the workpiece 2, and the workpiece 2 slides between the jig 5 and the tailstock 3 to shift the angle. In the case of forming an irregular cross-sectional shape by spinning, there is a disadvantage that the molded product is twisted when the angle of the workpiece 2 is shifted, which is inconvenient.

  This device has been made to eliminate the above-described disadvantages, and is provided on a guide shaft attached to the tip of the main shaft, a work fixing portion provided on the tip of the guide shaft, and an outer periphery of the guide shaft. A plurality of rail members, a linear guide movable along the rail members, a work support disk supported so as to be movable on the outer periphery of the guide shaft by the linear guide, and a backup roller receiving ring in contact with the backup roller When the processing force of the processing roller is applied to the metal workpiece, the resistance force of the backup roller is transmitted to the workpiece support disk via the backup roller receiving ring, and the metal workpiece back is supported by the workpiece support disk. By preventing deformation of metal workpieces, high-precision spinning is possible without using a mold. There is provided a spinning jig capable of packaging processing.

This device has the following contents.
(1) The spinning processing jig of the present invention is for spinning processing used in a spinning processing machine that presses a processing roller while rotating a metal workpiece and performs plastic processing while pressing a wrinkle of the metal workpiece with a backup roller. A jig that is attached to the tip of the main spindle of the spinning machine and is provided at the tip of the guide shaft, and is fixed by sandwiching a metal workpiece between the tailstock. A workpiece fixing portion, a plurality of rail members provided parallel to the main shaft on the outer periphery of the guide shaft, a linear guide movable in parallel to the main shaft along the rail member, and the guide shaft by the linear guide A workpiece supporting disk supported so as to be movable in parallel with the main shaft and a bar contacting the backup roller. When the processing force by the processing roller is applied to the metal workpiece, the resistance force by the backup roller is transmitted to the workpiece support disk via the backup roller receiving ring, and the metal workpiece The back surface is supported by a work support disk, thereby preventing deformation of the metal work.
(2) In the spinning jig described in (1), the work support disk is donut-shaped, and is supported by the linear guide so that the plate surface is perpendicular to the axis of the guide shaft. It is characterized by that.
(3) In the spinning processing jig according to (1) or (2), the work support disk has a built-in magnet and attracts a magnet-made metal work.

  According to the spinning processing jig of this device, the processing roller is pressed while rotating the metal workpiece, and the spinning processing jig used in the spinning processing machine that performs plastic processing while pressing the wrinkles of the metal workpiece with the backup roller. A columnar guide shaft that is attached to the tip of the main spindle of the spinning machine and is extended at the tip of the guide shaft, and a metal workpiece is sandwiched and fixed between a tailstock. A workpiece fixing portion; a plurality of rail members provided in parallel with the main shaft on an outer periphery of the guide shaft; a linear guide movable along the rail member in parallel with the main shaft; and A work supporting disc supported on the outer periphery so as to be movable in parallel with the main shaft, and the backup roller. When the processing force by the processing roller is applied to the metal workpiece, the resistance force by the backup roller is transmitted to the work support disk via the backup roller receiving ring, and the back surface of the metal workpiece is formed. Since the metal workpiece is prevented from being deformed by supporting the workpiece with the workpiece support disk, the workpiece is supported from the back by a flat surface, and the distortion of the workpiece due to the processing force is suppressed. Therefore, it is possible to perform molding by spinning with high accuracy without using a mold. Further, since the moment due to the processing force applied to the workpiece is also received by the friction between the workpiece support disc and the workpiece, the tailstock is less slipped. Therefore, it is possible to prevent a decrease in accuracy due to the twisting of the workpiece when forming an irregular cross-sectional shape.

Further, since the work plane is maintained by the work support disk, it is not necessary to bend the plate blank in advance.
Furthermore, since the back side of the workpiece is supported by surface contact with the workpiece support disk, the back surface of the workpiece is hardly damaged.
In addition, since the workpiece support disk has a donut shape and is supported by the linear guide so that the plate surface is perpendicular to the axis of the guide shaft, the workpiece is supported by a plane from the back. , Workpiece distortion due to machining force is suppressed.
Moreover, since the said work support disc incorporates a magnet and adsorbs a magnetism metal work, distortion of the metal work by processing power is controlled. Therefore, it is possible to perform molding by spinning with high accuracy without using a mold.

FIG. 1 is an explanatory view showing a usage state of a spinning jig according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of an essential part of the spinning jig. 3A and 3B are explanatory views showing a spinning process using the spinning jig. FIG. 4 is an explanatory view showing an edge bending process using the spinning jig. FIG. 5 is an explanatory view showing a spinning process using a conventional mold and a backup roller device. FIG. 6 is an explanatory view showing a molding example by edge bending of a blank plate material using a conventional spinning jig. FIGS. 7A and 7B are explanatory views showing an example of the elastic deformation of the workpiece and the decrease in the shape accuracy due to the conventional processing force. FIG. 8 is an explanatory view showing a spinning process that does not use a conventional mold. FIG. 9 is an explanatory view showing a spinning process using a conventional mold.

  Hereinafter, the present invention will be described in detail with reference to the drawings showing an embodiment. FIG. 1 is an explanatory view showing a use state of a spinning jig according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view of a main part of the spinning jig of the present invention. Here, the spinning processing jig 10 of the present invention is a spinning processing machine that presses the processing roller 12 while rotating the metal workpiece 11 and performs plastic processing while pressing the wrinkles of the metal workpiece 11 with the backup roller 19. Used for a spinning machine to be used, a columnar guide shaft 14 attached to the tip of a main shaft 13 of the spinning machine and extending the same, and provided at the tip of the guide shaft 14, a metal workpiece 11 is sandwiched between the tailstock 15 and a work fixing portion 14a, a plurality of rail members 16 provided in parallel to the main shaft 13 on the outer periphery of the guide shaft 14, and parallel to the main shaft 13 along the rail members 16. The linear guide 17 is movable to the outside, and the outer periphery of the guide shaft 14 is parallel to the main shaft 13 by the linear guide 17. A workpiece support disk 18 which is rotatably supported, and a backup roller receiving ring 20 for contact with the backup roller 19.

  The guide shaft 14 has a cylindrical shape, and is fixed to the distal end of the main shaft 13 with a bolt or the like by a main shaft mounting portion 21 having a large diameter at the base end. A work fixing portion 14 a having a large diameter is fixed to the tip of the guide shaft 14 with a bolt or the like, and the metal work 11 is sandwiched between the tailstock 15 and fixed. Further, a plurality of rail members 16 are provided on the outer periphery of the guide shaft 14 in parallel with the main shaft 13 along the axial direction. The rail members 16 are erected on the outer circumference of the guide shaft 14 in the radial direction at equal intervals, for example, at 120 ° intervals.

  The linear guide 17 is supported so as to be movable along the rail member 16 in parallel with the main shaft 13. The linear guide 17 is fixed to an annular support frame 22, and a work support disk 18 is fixed to the support frame 22. Therefore, when the linear guide 17 moves along the rail member 16, the work support disk 18 also moves in the axial direction of the guide shaft 14. A back-up roller receiving ring 20 that is in contact with the back-up roller 19 is fixed to the back surface of the work support disc 18.

  The work support disk 18 is a donut-shaped disk, and a magnet 23 is disposed at a predetermined position, and can attract a magnetically attracted metal work. The tailstock 15 is disposed to face the front surface of the guide shaft 14 and is supported by a hydraulic cylinder 24 so as to be able to advance and retreat.

  The processing roller 12 is rotatably supported and is disposed so as to be movable in a plane including the rotation axis of the workpiece by a biaxial hydraulic cylinder or a ball screw mechanism. The backup roller 19 is rotatably supported, and is disposed so as to be in contact with a backup roller receiving ring 20 disposed on the back surface of the work support disk 18 by a hydraulic cylinder 25.

The spinning processing jig 10 configured as described above is fixed to the tip of the main shaft 13 as shown in FIG. 1 and used for spinning processing. First, the metal workpiece 11 is fixed to the workpiece fixing portion 14 a of the guide shaft 14 by the tailstock 15. Next, when the processing roller 12 is moved in a plane including the rotation axis of the workpiece by the biaxial hydraulic cylinder to come into contact with the metal workpiece 11, and the processing force by the processing roller 12 is applied to the metal workpiece 11, The backup roller 19 is advanced by the hydraulic cylinder 25 until it contacts the backup roller receiving ring 20, and the resistance force by the backup roller 19 is transmitted to the work support disk 18 through the backup roller receiving ring 20.
In this way, the metal workpiece 11 can be prevented from being deformed by supporting the back surface of the metal workpiece 11 with the workpiece support disk 18.

  In moldless (dieless) molding without using a mold, if the unprocessed flange portion of the metal workpiece 11 (work plate material) is kept on a plane orthogonal to the main shaft 13 during processing, the shape accuracy can be improved. Decline can be prevented. Therefore, the work plate material may be supported from the back surface by the work support disk 18 that rotates together with the main shaft 13, and the disk may be gradually retracted as the processing proceeds. For this purpose, a plurality of sets of rail members 16 and linear guides 17 are provided on a guide shaft 14 extending from the main shaft 13 in a direction parallel to the main shaft 13, thereby supporting a work support disk 18 orthogonal to the main shaft 13. The workpiece fixing portion 14a that sandwiches the metal workpiece 11 with the tailstock 15 can correspond to various machining shapes if it can be replaced according to the shape of the upper end of the workpiece.

  On the other hand, since a large machining force is applied to the metal workpiece 11 in the main axis direction, it is necessary to balance it by applying a force against this from the back side of the workpiece support disk 18. Usually, a spinning machine is provided with a backup roller device used for drawing spinning. In order to prevent wrinkles generated on the outer periphery of the workpiece when performing multi-cycle drawing spinning, the back-up roller 19 is applied to the outer periphery of the workpiece from the back side to prevent wrinkles. The backup roller 19 is attached to a hydraulic cylinder 25 that functions as a damper during processing, and retracts following the processing roller 12 as the molding progresses (see FIG. 5).

  Therefore, the backup roller device is also used in the spinning jig 10 of the present invention. If the backup roller receiving ring 20 and the backup roller 19 are kept in contact with each other, the resistance force by the hydraulic cylinder 25 is transmitted to the work support disc 18, so that the work is kept on a plane perpendicular to the main shaft 13 against the machining force. As the machining progresses, the workpiece support disk 18 can be retracted (FIGS. 3A and 3B).

Further, if the magnet 23 is built in the work support disc 18, the work 11 of the steel plate, which is a magnetically absorbing metal, can be attracted, so that the work can be more securely held on the plane.
In addition, the blank is assumed to be a flat plate. However, when the edge bending of the blank is necessary to further increase the processing accuracy, the workpiece support disk 18 is advanced to the same plane as the workpiece fixing portion 14a, and the edge is If dieless processing is performed after bending 11a, it can be formed from a flat plate with one chuck (see FIG. 4).

  Furthermore, the present invention is not limited to the above-described embodiments, and various design changes can be made based on the description of the claims of the utility model registration.

DESCRIPTION OF SYMBOLS 10 Spinning jig | tool 11 Metal workpiece 11a Edge 12 Processing roller 13 Main shaft 14 Guide shaft 14a Work fixing | fixed part
DESCRIPTION OF SYMBOLS 15 Tailstock 16 Rail member 17 Linear guide 18 Workpiece support disk 19 Backup roller 20 Backup roller receiving ring 21 Spindle attachment part 22 Support frame 23 Magnet 24 Hydraulic cylinder 25 Hydraulic cylinder

Claims (3)

A spinning processing jig used for a spinning processing machine that presses a processing roller while rotating a metal workpiece and plastically processes the metal workpiece while pressing a wrinkle of the metal workpiece,
A columnar guide shaft that is attached to and extends the spindle end of the spinning machine, and a work fixing portion that is provided at the front end of the guide shaft and fixes a metal work between a tailstock, A plurality of rail members provided on the outer periphery of the guide shaft in parallel with the main shaft, a linear guide movable in parallel with the main shaft along the rail member, and the outer periphery of the guide shaft by the linear guide with the main shaft A work support disk that is supported so as to be movable in parallel and a backup roller receiving ring that comes into contact with the backup roller, and when the processing force by the processing roller is applied to a metal workpiece, the resistance force by the backup roller Is transmitted to the work support disk via the backup roller receiving ring, and the back surface of the metal work is Spinning jig, characterized in that to prevent deformation of the metal workpiece by supporting by chromatography click carrier disk.   2. The spinning process according to claim 1, wherein the work support disk has a donut shape and is supported by the linear guide such that a plate surface is perpendicular to an axis of the guide shaft. jig.   The spinning jig according to claim 1, wherein the work support disk includes a magnet and adsorbs a magnetized metal work.

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