JP2010194636A - Tool for positioning internal gear workpiece - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tool for positioning an internal gear workpiece capable of centering the internal gear workpiece and preventing precision in positioning of the internal gear workpiece from being reduced due to chips during machining of the internal gear workpiece by a comparatively simple configuration. <P>SOLUTION: This tool for positioning the internal gear workpiece is provided with a mount 51 having a horizontal reference plane 51a for regulating a mounting position on one side face 101b of the internal gear workpiece 101, a clamp device 52 for pressing and fixing the internal gear workpiece 101 against/on the reference plane 51a from an upper face 101c on the opposite side, a centering tool 20 being opened and extended in the radial direction on an inner side of the internal gear workpiece 101 and being engaged with a tooth groove 101a of the internal gear workpiece 101 for centering, a support implement 30 for supporting the centering tool 20, and a centering tool moving device 40 provided on the support implement 30 and moving the centering tool 20 between a position for centering the internal gear workpiece 101 and an evacuation position above the internal gear workpiece 101. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to an internal gear workpiece positioning jig for positioning an internal gear workpiece.

  The internal gear work after heat treatment is fixed to a mounting base, and the gear accuracy is improved by grinding and finishing the tooth surfaces of the internal gear work in this state. In order to perform grinding and finishing with high accuracy, it is important to position the internal gear work on the mounting base with high accuracy and then fix it. Therefore, various internal gear workpiece positioning jigs have been developed for positioning the internal gear workpiece, specifically, centering the internal gear workpiece. As a method for centering an internal gear work, there is a method of performing centering with reference to a tooth surface (tooth gap) of the internal gear work and fixing the work to a mounting base. By using the tooth surface as a reference, the deviation of the machining allowance at the time of the grinding finishing process is reduced, so that the machining allowance can be minimized, and as a result, the machining time can be shortened.

  For example, Patent Document 1 includes a jig body in which a reference surface that regulates the attachment position of the side surface of the workpiece is provided on the side surface, and a finger chuck that presses and fixes the workpiece to the reference surface from the opposite side. The tool body is provided with a centering tool that is centered by expanding radially inside the work and engaging with the tooth groove of the work, and the centering tool can be moved forward and backward in the axial direction of the work. An internal gear grinding jig is disclosed.

No. 7-27056 (see, for example, [FIG. 1], [FIG. 2], [FIG. 3], etc.)

  However, in the above-mentioned internal gear grinding jig, the chips generated when grinding the workpiece are easily collected in the jig body, and the chips adhere to the centering tool, thereby improving the accuracy of the grinding finishing process. There was a possibility of lowering. In addition, by installing equipment that discharges the chips to the outside of the jig body, it is possible to maintain the precision of the grinding finishing process, but this increases the manufacturing cost by installing such equipment. .

  Therefore, the present invention has been proposed in view of the above-described problems, and it is possible to center the internal gear workpiece with a relatively simple configuration and to cause chips generated by the processing of the internal gear workpiece. An object of the present invention is to provide an internal gear workpiece positioning jig capable of avoiding a decrease in positioning accuracy of the internal gear workpiece.

The internal gear workpiece positioning jig according to the first invention for solving the above-described problem is as follows.
A mounting base horizontally provided with a reference surface for regulating the mounting position of one side of the internal gear workpiece;
A pressing and fixing means for pressing and fixing the internal gear workpiece from the upper surface on the opposite side to the reference surface;
A centering tool that radially expands inside the internal gear work and engages with a tooth groove of the internal gear work;
A support for supporting the centering tool;
Centering tool moving means provided on the support and for moving the centering tool between a position for positioning the internal gear work and a retracted position above the internal gear work. And

The internal gear workpiece positioning jig according to the second invention for solving the above-described problem is as follows.
An internal gear workpiece positioning jig according to a first invention,
The centering tool moving means includes an up-down direction moving tool for moving the centering tool in the up-down direction.

The internal gear workpiece positioning jig according to the third invention for solving the above-described problem is as follows.
An internal gear workpiece positioning jig according to a second invention,
The centering tool moving means further includes a turning direction moving tool for moving the centering tool in a turning direction.

The internal gear workpiece positioning jig according to the fourth invention for solving the above-described problem is as follows.
An internal gear workpiece positioning jig according to any one of the first to third inventions,
The centering tool is provided at the bottom of the centering tool main body with a cylindrical centering tool main body with a built-in cylinder, a push rod provided at the tip of a piston rod that can freely enter and leave the cylinder. An annular member movable in the horizontal direction,
The push rod has a tapered portion formed on the tip side,
The annular member has a tapered hole that contacts the tapered portion of the push rod, and an engaging portion that engages with a tooth groove of the internal gear workpiece.

An internal gear workpiece positioning jig according to a fifth invention for solving the above-described problem is as follows.
An internal gear workpiece positioning jig according to a fourth invention,
The annular member is composed of a plurality of annular divided pieces.

The internal gear workpiece positioning jig according to the sixth invention for solving the above-described problem is as follows.
An internal gear workpiece positioning jig according to a fifth invention,
The engaging portion is a groove provided on an outer peripheral surface of the plurality of annular divided pieces, or a sphere provided on an outer peripheral surface of the plurality of annular divided pieces, or an outer periphery of the plurality of annular divided pieces. The pin is provided on the surface.

  According to the internal gear workpiece positioning jig according to the present invention, the internal gear workpiece can be centered with a relatively simple configuration, and the internal gear work is caused by chips generated in the processing of the internal gear workpiece. A decrease in positioning accuracy of the internal gear workpiece can be avoided.

It is a schematic diagram of a first embodiment of an internal gear workpiece positioning jig according to the present invention. It is the II-II sectional view taken on the line in FIG. It is a perspective view of the holder | retainer with which the internal gear workpiece positioning jig | tool which concerns on 1st embodiment of this invention comprises. It is a figure for demonstrating 1st embodiment of the internal gear workpiece positioning jig | tool which concerns on this invention, and when it positions the centering tool in the position which positions an internal gear workpiece in Fig.4 (a). 4 (b) shows a state when the push rod provided in the centering tool protrudes downward, and FIG. 4 (c) shows a state when the centering tool is positioned at the retracted position. It is a schematic diagram of 2nd embodiment of the internal gear workpiece positioning jig | tool which concerns on this invention.

  Each embodiment of the internal gear workpiece positioning jig according to the present invention will be described below.

[First embodiment]
A first embodiment of an internal gear workpiece positioning jig according to the present invention will be described with reference to FIGS. 1, 2, 3, and 4.
FIG. 1 is a schematic view of a first embodiment of an internal gear workpiece positioning jig according to the present invention, and FIG. 2 is a sectional view taken along line II-II in FIG. FIG. 3 is a perspective view of a cage included in the internal gear workpiece positioning jig according to the first embodiment of the present invention. FIG. 4 is a view for explaining a first embodiment of the internal gear workpiece positioning jig according to the present invention. FIG. 4 (a) shows the centering tool at a position for positioning the internal gear workpiece. FIG. 4B shows a state when the centering tool is protruded downward, and FIG. 4C shows a state when the centering tool is positioned at the retracted position. Indicates. 1 and 4, the Y-axis direction indicates the vertical (vertical) direction.

  This embodiment demonstrates the case where the support tool which supports a centering tool is moved to an up-down direction.

  As shown in FIG. 1, the internal gear workpiece positioning jig according to the present embodiment expands in the radial direction inside the internal gear workpiece 101 and engages with the tooth groove 101 a of the internal gear workpiece 101 to engage the internal gear. A centering tool 20 for centering the workpiece 101 and a support tool 30 for supporting the centering tool 20 are provided. Reference numeral 51 denotes a mounting base on which the internal gear workpiece 101 is mounted when the internal gear workpiece 101 is subjected to processing such as grinding and finishing. Reference numeral 51a denotes a mounting position of one side surface 101b of the internal gear workpiece 101. A reference surface to be regulated is shown. Reference numeral 52 denotes a clamp device which is a pressing and fixing means for pressing and fixing the internal gear workpiece 101 arranged on the reference surface 51a of the mounting base 51 from the upper surface 101c on the opposite side of the one side surface 101b.

  The centering tool 20 includes a centering tool body 21, a push rod 24, an annular member 27, a sphere 28, and a cage 29. The centering tool main body 21 has a cylindrical shape with a top, and a protruding portion 21c protruding in the radial direction is provided on the lower end portion 21a side. The centering tool body 21 has a built-in cylinder 22, and a push rod 24 is provided at the tip of a piston rod 23 that can freely enter and leave the cylinder 22. Therefore, the push rod 24 can be moved in the vertical (vertical) direction indicated by the arrow B by advancing and retracting the piston rod 23 by supplying and discharging fluid (for example, hydraulic pressure, pneumatic pressure, etc.) into the cylinder 22. It has become. In the vicinity of the lower end portion 21a of the centering tool main body 21, a tapered hole 21d that abuts a tapered portion 24d of a push rod 24 described later is formed. Further, a linear guide (not shown) that extends linearly in the radial direction around the axial center of the push rod 24 is provided at the lower end 21 a of the centering tool body 21.

  The push rod 24 is formed such that its diameter gradually increases from the intermediate portion 24c to the distal end portion 24a from the intermediate portion 24c to the distal end portion 24a, and a conical tapered portion 24d is formed.

  The upper part 27c of the annular member 27 is formed with a sliding part (not shown) that can slide on the linear guide at the lower end part 21a of the centering tool body 21, and each of the annular divided pieces 271, 272, described later. 273 is provided at the lower end portion 21a of the centering tool main body 21 so as to be movable in the horizontal direction. In other words, each of the annular divided pieces 271, 272, 273 is movable in the radial direction C around the push rod 24. The annular member 27 is composed of a plurality of annular divided pieces, here, as shown in FIG. 2, three annular divided pieces 271, 272, and 273 divided into three in the circumferential direction. Tapered holes 271 a, 272 a, and 273 a are formed in the annular divided pieces 271, 272, and 273 so as to contact the tapered portion 24 d of the push rod 24. Further, a substantially hemispherical groove 27d with which the spherical body 28 abuts is formed on the outer peripheral portion 27b of the annular member 27. Specifically, substantially hemispherical grooves 271d, 272d, and 273d are formed on the outer peripheral portions 271b, 272b, and 273b of the annular divided pieces 271, 272, and 273, respectively.

  As shown in FIGS. 1 to 3, the retainer 29 is an annular plate piece whose inner diameter is larger than the diameter of the annular member 27, specifically, the diameter formed by the three annular divided pieces 271, 272, and 273. The outer diameter is formed smaller than the inner diameter of the internal gear workpiece 101. A plurality of holes 29 a are formed in the circumferential direction of the cage 29. Each hole 29 a has a diameter smaller than that of the sphere 28. Therefore, the spherical body 28 is disposed in the groove 27d of the annular member 27, and the retainer 29 is disposed outside the diameter of the retainer 29, and the hole 29a of the retainer 29 is disposed in contact with the spherical body 28. The spherical body 28 is attached to the groove 27 d of the annular member 27 by the force that the vessel 29 returns to its original shape.

  As shown in FIG. 1, the centering tool 20 described above has a tip part 30 b of a support tool (support arm) 30 connected to the upper part 21 b side of the centering tool body 21, and is supported by the support tool 30. Yes. The support 30 is formed so as to extend in a substantially horizontal direction. On the proximal end side 30 a of the support tool 30, a centering tool moving device (centering tool) that moves the centering tool 20 between a position where the internal gear work 101 is positioned and a retracted position above the internal gear work 101 is provided. (Ejecting tool moving means) 40 is provided. The centering tool moving device 40 is a vertical moving tool that moves the support tool 30 in the vertical direction, and includes a cylinder 41 and a piston rod 42. The cylinder 41 is provided on the base 44. Therefore, the centering tool 20 can move in the vertical (vertical) direction, which is the direction indicated by the arrow A, by expanding and contracting the piston rod 42 by supplying and discharging fluid (for example, hydraulic pressure, pneumatic pressure, etc.) into the cylinder 41. It has become.

  Here, the case where the internal gear workpiece positioning is performed by the above-described internal gear workpiece positioning jig will be described.

  First, the internal gear work 101 is arranged on the mounting base 51. Subsequently, the piston rod 42 is retracted by supplying / discharging the fluid to / from the cylinder 41, so that the spherical body 24 is disposed to face the tooth groove 101 a of the internal gear workpiece 101. That is, the centering tool 20 is positioned at a position where the internal gear workpiece 101 is positioned.

  Subsequently, the push rod 24 is moved upward by retracting the piston rod 23 by supplying and discharging fluid to and from the cylinder 22. Thereby, the force which moves to the direction which expands each said annular division | segmentation piece 271,272,273 acts with respect to each annular division | segmentation piece 271,272,273. At this time, the spherical body 28 hits the tooth groove 101a of the internal gear workpiece 101, and the internal gear workpiece 101 is centered. Specifically, since the annular divided pieces 271, 272, and 273 form an annular shape, the force that moves the annular divided pieces 271, 272, and 273 in the direction of expanding the diameter of the internal gear workpiece 101 via the spherical body 28 By acting on the tooth gap 101a, the internal gear workpiece 101 is centered. In this state, as shown in FIG. 4A, the internal gear workpiece 101 is fixed to the reference surface 51 a of the mounting base 51 by the clamp device 52.

  Subsequently, as shown in FIG. 4B, the push rod 24 is moved downward by advancing the piston rod 23 by supplying and discharging fluid to and from the cylinder 22. As a result, the force (force in the diameter increasing direction) acting on each annular divided piece 271, 272, 273 is eliminated, and the centering of the internal gear workpiece 101 by each annular divided piece 271, 272, 273 is released.

  Subsequently, as shown in FIG. 4C, the centering tool 20 of the internal gear workpiece 101 is moved by moving the support tool 30 upward by advancing the piston rod 42 by supplying and discharging fluid to the cylinder 41. It is positioned in the upper retracted position. Then, the rotary tool T attached to the tip of the main shaft 102 is moved into the internal gear workpiece 101 to process the internal gear workpiece 101.

  Therefore, according to the internal gear workpiece positioning jig according to the present embodiment, the mounting base 51, the clamp device 52, the centering tool 20, the support tool 30, and the centering tool moving device 40 are relatively provided. The internal gear workpiece 101 can be centered with a simple configuration. Further, since the centering tool 20 can be retracted above the internal gear workpiece 101, the internal gear caused by the chips without causing the chips generated when the internal gear workpiece 101 is processed to adhere to the centering tool 20. A decrease in the positioning accuracy of the workpiece 101 can be avoided. Moreover, since it is not necessary to perform the chip discharge process, it is possible to suppress an increase in manufacturing cost due to the installation of a device that performs the chip discharge process.

[Second Embodiment]
A second embodiment of the internal gear workpiece positioning jig according to the present invention will be specifically described with reference to FIG.
FIG. 5 is a schematic view of a second embodiment of the internal gear workpiece positioning jig according to the present invention. In FIG. 5, the Y-axis direction indicates the vertical (vertical) direction.
In the present embodiment, the same members as those in the internal gear workpiece positioning jig of the first embodiment described above are denoted by the same reference numerals, and the description thereof is omitted.

  This embodiment demonstrates the case where the support tool 30 which supports the centering tool 20 is moved to an up-down direction and a turning direction.

  As shown in FIG. 5, the internal gear workpiece positioning jig according to this embodiment is configured so that the centering tool 20 is positioned between a position where the internal gear workpiece 101 is positioned and a retracted position above the internal gear workpiece 101. A centering tool moving device (centering tool moving means) 140 is provided.

  The centering tool moving device 140 is a vertical direction moving tool that moves the support tool 30 in the vertical direction, and is a cylinder 41 and piston rod 42 and a turning direction moving tool that moves the support tool 30 in the turning direction D. A motor 141 is provided. The motor 141 is disposed in the piston rod 42 of the cylinder 41. Thus, by providing the centering tool moving device 140 including the motor 141 in addition to the cylinder 41 and the piston rod 42, the centering tool 20 is positioned to position the internal gear work 101 and the internal gear work 101. The centering tool 20 can be moved to a position away from directly above the internal gear workpiece 101, and the centering tool 20, the main shaft 102, and the rotary tool T can be moved. Can be reliably avoided.

  Therefore, according to the internal gear workpiece positioning jig according to the present embodiment, the mounting base 51, the clamp device 52, the centering tool 20, the support tool 30, and the centering tool moving device 140 are provided as described above. Similar to the internal gear workpiece positioning jig according to the first embodiment, the internal gear workpiece 101 can be centered with a relatively simple configuration. Further, since the centering tool 20 can be retracted above the internal gear workpiece 101, the internal gear caused by the chips without causing the chips generated when the internal gear workpiece 101 is processed to adhere to the centering tool 20. A decrease in the positioning accuracy of the workpiece 101 can be avoided. Moreover, since it is not necessary to perform the chip discharge process, it is possible to suppress an increase in manufacturing cost due to the installation of a device that performs the chip discharge process.

[Other Embodiments]
In the first and second embodiments described above, the internal gear work positioning is performed by centering the spherical body 28 against the tooth groove 101a of the internal gear work 101 by expanding the diameter of the annular divided pieces 271, 272, 273. The jig for positioning an internal gear workpiece having an annular divided piece provided with a tooth surface (groove portion) that meshes with the tooth groove of the internal gear workpiece on the outer peripheral surface instead of the sphere 28 has been described. It is also possible. Moreover, it is also possible to set it as the internal gear workpiece positioning jig | tool which comprises the cyclic | annular division piece which provided the pin in the outer peripheral surface. Furthermore, it is also possible to use an internal gear workpiece positioning jig including an annular divided piece in which a sphere is directly attached to the outer peripheral surface. An annular split piece having a push rod 24 having a taper portion 24d formed with its diameter gradually increasing from the intermediate portion 24c toward the tip end portion 24a side, and taper holes 271a, 272a, 273a contacting the taper portion 24d. The push rod having a tapered portion formed by gradually reducing the diameter from the intermediate portion side toward the tip portion side, as described using the internal gear workpiece positioning jig having 271, 272, and 273, It is also possible to provide an internal gear workpiece positioning jig including an annular divided piece having a tapered hole that comes into contact with the tapered portion of the push rod. Although the description has been given using the internal gear workpiece positioning jig including the annular member 27 constituted by the three annular divided pieces 271, 272, 273, the annular member constituted by four or more annular divided pieces is used. It is also possible to use an internal gear workpiece positioning jig provided. Even such internal gear workpiece positioning jigs have the same effects as the internal gear workpiece positioning jigs according to the first and second embodiments described above.

  According to the internal gear workpiece positioning jig according to the present invention, the internal gear workpiece can be centered with a relatively simple configuration, and the internal gear work is caused by chips generated in the processing of the internal gear workpiece. Since it is possible to avoid a decrease in the positioning accuracy of the internal gear workpiece, it can be used beneficially in the machine tool industry and the like.

20 Centering tool 21 Centering tool main body 21a Lower end 21b Upper part 21c Overhanging part 21d Taper hole 22 Cylinder 23 Piston rod 24 Push rod 24a Tip part 24c Intermediate part 24d Tapered part 27 Annular member 271 to 273 Annular division piece 28 Sphere 29 Holding Device 30 Support tool 40, 140 Centering tool moving device 41 Cylinder 42 Piston rod 44 Base 51 Mounting base 51a Reference surface 52 Clamping device 101 Internal gear work 101a Internal gear work tooth groove 101b Internal gear work one side surface 101c Internal gear Upper surface 102 of workpiece Spindle 141 Motor T Rotary tool

Claims (6)

A mounting base horizontally provided with a reference surface for regulating the mounting position of one side of the internal gear workpiece;
A pressing and fixing means for pressing and fixing the internal gear workpiece from the upper surface on the opposite side to the reference surface;
A centering tool that radially expands inside the internal gear work and engages with a tooth groove of the internal gear work,
A support for supporting the centering tool;
Centering tool moving means provided on the support and for moving the centering tool between a position for positioning the internal gear work and a retreat position above the internal gear work. An internal gear workpiece positioning jig. An internal gear workpiece positioning jig according to claim 1,
The internal gear workpiece positioning jig, wherein the centering tool moving means includes a vertical moving tool for moving the centering tool in the vertical direction. An internal gear workpiece positioning jig according to claim 2,
The internal gear work positioning jig, wherein the centering tool moving means further comprises a turning direction moving tool for moving the centering tool in a turning direction. An internal gear workpiece positioning jig according to any one of claims 1 to 3,
The centering tool is provided at the bottom of the centering tool main body having a cylindrical cylindrical centering tool main body, a push rod provided at the tip of a piston rod that can freely enter and leave the cylinder. An annular member movable in the horizontal direction,
The push rod has a tapered portion formed on the tip side,
The internal gear workpiece positioning jig, wherein the annular member has a tapered hole that contacts the tapered portion of the push rod and an engaging portion that engages with a tooth groove of the internal gear workpiece. An internal gear workpiece positioning jig according to claim 4,
An internal gear workpiece positioning jig, wherein the annular member is composed of a plurality of annular divided pieces. An internal gear workpiece positioning jig according to claim 5,
The engaging portion is a groove provided on an outer peripheral surface of the plurality of annular divided pieces, or a sphere provided on an outer peripheral surface of the plurality of annular divided pieces, or an outer periphery of the plurality of annular divided pieces. An internal gear workpiece positioning jig characterized by being a pin provided on a surface.

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