JP2008030125A - Tape wrapping apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tape wrapping apparatus for working a workpiece such as an automotive part including a crank shaft, which has a backup shoe assembly having a concave rigid surface free from slide occurring even if either a material of a rotary shaft surface of the workpiece, the number of rotations of the shaft or a grain size of a coating surface of a tape polishing material differs and satisfying rotary shaft surface accuracy of the workpiece. <P>SOLUTION: Fine unevenness 24 containing fine countersinking is formed on the concave rigid surface 4 of the backup shoe assembly 5. A super hard abrasive grain electrodeposited layer 16 with super hard abrasive grains 14 containing diamond electrodeposited is further provided on the fine unevenness 24 containing the fine countersinking on the surface 4 of the assembly 5. Slide is prevented by a sharp corner 25 of the fine unevenness 24 containing the fine countersinking and unevenness 15 having a sharp corner of the super hard abrasive grains 14 containing diamond. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention comprises an abrasive-coated tape and a backup shoe assembly having a concave rigid surface that presses the tape abrasive-coated surface in contact with the surface of a rotating shaft of a workpiece such as an automobile part including a crankshaft. The present invention relates to a tape wrap device that is processed by rotating a rotating shaft of a workpiece.

As a tape wrap device comprising a conventional abrasive-coated tape and a backup shoe assembly having a concave rigid surface that makes the tape abrasive-coated surface come into contact with and press the rotating shaft surface of a workpiece including a crankshaft, for example, There is one disclosed in Patent Document 1. In FIG. 4, the surface of the backup shoe assembly having the concave rigid surface of Patent Document 1 is formed by attaching a grindstone insert made of a honing grindstone material. The concave rigid surface formed by this grindstone insert has the required hardness and friction characteristics, and when the workpiece rotation shaft is rotated, the tape abrasive coated surface is turned to the workpiece rotation shaft. Clamps to a fixed position without slipping on the surface, rotates and revolves the rotating shaft of the workpiece, performs micro-finishing of the shaft, and has the purpose of satisfying the surface accuracy of the rotating shaft of the workpiece.
Japanese Examined Patent Publication No. 5-9225 Japanese Patent Laid-Open No. 9-47958

  Although the concave rigid surface formed by the grindstone insert made from the honing grindstone material on the surface of the backup shoe assembly disclosed in Patent Document 1 has the required hardness, the material of the rotating shaft surface of the workpiece, the workpiece If either the rotational speed of the rotating shaft or the particle size of the coated surface of the tape abrasive material is different, the abrasive coated tape surface pressed by the backup shoe assembly surface and the concave rigid surface of the backup shoe assembly surface due to a change in friction force Was smaller than the friction coefficient between the surface of the rotating shaft of the workpiece and the abrasive coating surface of the tape, causing slippage, which deteriorated the surface accuracy of the rotating shaft of the workpiece. As a countermeasure, prepare a backup shoe assembly with a large number of concave rigid surfaces dedicated to the workpiece that matches the friction force of the workpiece, or when the friction force of the workpiece changes, the friction force As a tape holding device that can respond to changes, a double-sided tape with abrasive grains deposited on both sides is placed between the concave rigid surface of the backup shoe assembly and the anti-abrasive coating surface (back surface) of the tape. Although the tape before being sent to the surface of the rotating shaft is held by another pressure roller, it is difficult to handle and requires an additional tape holding device and additional drive and control device for the tape holding device. It became. Although the surface of the backup shoe assembly may be formed of an elastic urethane insert, it is not a rigid surface, so that the rotational axis surface accuracy of the workpiece cannot be satisfied. In Patent Document 2, as a backup shoe assembly, instead of a urethane insert, a metal base on which diamond powder fitted and supported so as to be able to advance and retreat is welded, and elasticity that is embedded behind the base and elastically contacts the base The backup shoe assembly comprising the body is disclosed, but when the backup shoe assembly comprising the elastic body elastically contacting the holding body is used for the concave rigid surface, the rotational axis surface accuracy of the workpiece may be satisfied. Can not.

  An object of the present invention is to provide an abrasive-coated tape, and a backup shoe assembly having a concave rigid surface that contacts and presses the tape-coated material-coated surface against the surface of a rotating shaft of a workpiece such as an automobile part including a crankshaft. In the tape wrapping apparatus, which is processed by rotating the rotation axis of the workpiece, either the material of the surface of the rotation axis of the workpiece, the number of rotations of the rotation axis of the workpiece, or the grain size of the coated surface of the tape abrasive material However, the present invention provides a tape wrap device having a backup shoe assembly having a concave rigid surface that does not generate slip even when the frictional force changes and satisfies the rotational axis surface accuracy of the workpiece.

Therefore, the first invention of the present invention is a backup having an abrasive-coated tape and a concave rigid surface that presses the tape-coated material-coated surface in contact with the surface of a rotating shaft of a workpiece such as an automobile part including a crankshaft. In a tape wrap apparatus comprising a shoe assembly and processed by rotating a rotating shaft of a workpiece, the cemented carbide grain electrodeposited with a carbide grain containing diamond on the concave rigid surface of the backup shoe assembly Solving the problems of the conventional products described above by providing a tape wrap device provided with an electrodeposition layer and forming the concave rigid surface with irregularities having sharp corners to prevent slippage did.
According to a second aspect of the present invention, there is provided an abrasive-coated tape, and a back-up shoe assembly having a concave rigid surface that presses the tape abrasive-coated surface in contact with a rotating shaft surface of a workpiece such as an automobile part including a crankshaft. In a tape wrap apparatus that is formed by a three-dimensional structure and is processed by rotating a rotating shaft of a workpiece, a fine unevenness including fine hole processing is formed on the concave rigid surface of the backup shoe assembly, The problems of the conventional products described above were solved by providing a tape wrap device characterized in that slipping is prevented by sharp corners of fine irregularities including hole machining.

  With this configuration, the cemented abrasive electrodeposition layer in which cemented abrasive grains containing diamond are electrodeposited is provided on the concave rigid surface of the backup shoe assembly according to the first invention of the present invention, and the concave rigid surface is sharpened. It is formed by unevenness having corners to prevent slipping, or the concave rigid surface of the backup shoe assembly, which is the configuration of the configuration of the second invention of the present invention, includes a fine hole processing. By forming unevenness and preventing slipping by the sharp corners of the fine unevenness including each fine hole processing, the material of the surface of the rotating shaft of the workpiece, the rotation of the rotating shaft of the workpiece Even if either the number or the tape abrasive coated surface particle size is different and the frictional force changes, a stable processed surface that satisfies the rotational axis surface accuracy of the work piece can be efficiently processed without slipping. Addition according to the frictional force of the workpiece Prepare a backup shoe assembly with a large number of concave rigid surfaces dedicated to the object, or an additional tape holding device that can respond to changes in frictional force when the frictional force of the workpiece changes, and additional tape holding device Thus, a tape wrap device having a backup shoe assembly having a concave rigid surface is provided, which eliminates the need for any of the drive / control devices, and reduces the cost.

Preferably, a carbide abrasive grain containing diamond is electrodeposited on the concave rigid surface of the backup shoe assembly in which sharp corners of fine irregularities including the fine hole machining are formed, and each fine hole machining is included. By preventing the slip by the sharp corners of the fine irregularities and the irregularities having the sharp corners of the carbide abrasive grains containing each diamond, the material of the rotating shaft surface of the workpiece, even either different frictional forces of the rotational speed or tape abrasive coated surface granularity of the rotation axis of the workpiece is changed, without generating more slip, stable processing surface satisfies the rotary shaft surface precision of the workpiece The present invention provides a tape wrap apparatus having a backup shoe assembly having a concave rigid surface that can be efficiently processed.

  An example of the best mode for carrying out the present invention will be described with reference to the drawings. 1 is a schematic side view of a main part of a tape wrap apparatus having a backup shoe assembly having a concave rigid surface according to an embodiment of the present invention, FIG. 2 is a top view of the main part of FIG. 1, and FIG. 1 is an enlarged top view of one embodiment of the first invention of a backup shoe assembly having one concave rigid surface, (b) is a side view of (a), and (c) is a partial enlargement of part A of (b). 4A is an enlarged top view of one second embodiment of the backup shoe assembly having the concave rigid surface of FIG. 1, FIG. 4B is a side view of FIG. FIG. 5B is an enlarged top view of a second embodiment of the second invention of the backup shoe assembly having the concave rigid surface of FIG. 1, and FIG. (A) is a side view, and (c) is a partially enlarged view of part C of (b).

  As shown in FIGS. 1 to 3, the tape wrap device according to the first embodiment of the present invention includes an abrasive covering tape 1 and an automobile part including a crankshaft on the abrasive covering surface of the abrasive covering tape 1. The back-up shoe assembly 5 has a concave rigid surface 4 that contacts and presses the rotating shaft surface 3 of the workpiece 2. The rotating shaft 3 of the workpiece 2 is rotated to perform micro finishing of the rotating shaft 3. . An open / close arm 6 supports the backup shoe assembly 5. The tape wrap apparatus according to the first embodiment of the present invention is provided with a cemented carbide electrodeposited layer 16 in which cemented abrasive grains 14 containing diamond are electrodeposited on the concave rigid surface 4 of the backup shoe assembly 5. The rigid surface 4 is formed by unevenness 15 having sharp corners to prevent slippage.

  As shown in FIG. 1, FIG. 2 and FIG. 4, the tape wrap apparatus of the second embodiment of the present invention is an automotive part including an abrasive covering tape 11 and an abrasive covering surface 8 of the tape 11 including a crankshaft. The back-up shoe assembly 5 has a concave rigid surface 4 that contacts and presses the rotating shaft surface 3 of the work piece 2, etc., and the rotating shaft 3 of the work piece 2 is rotated to micro-finish the rotating shaft 3. Do. The tape wrapping apparatus according to the second embodiment of the present invention is formed by forming fine irregularities 24 including fine hole machining on the concave rigid surface 4 of the backup shoe assembly 5 and fine irregularities including each minute hole machining. Slip is prevented by 24 sharp corners 25.

  With this configuration, a cemented carbide electrodeposited layer in which cemented abrasive grains containing diamond are electrodeposited is provided on the concave rigid surface of the backup shoe assembly according to the first invention of the present invention, and the concave rigid surface is sharpened. In order to prevent slipping by forming with irregularities having a corner, or a fine surface including a fine hole in the concave rigid surface of the backup shoe assembly, which is a constitution of the configuration of the second invention of the present invention By forming irregularities and preventing slipping by sharp corners of fine irregularities including each minute hole machining, the material of the surface of the rotating shaft of the workpiece, the rotation speed of the rotating shaft of the workpiece Or even if the frictional force changes due to any difference in the particle size of the coated surface of the tape abrasive material, slipping does not occur, and a stable machined surface that satisfies the rotational axis surface accuracy of the workpiece can be efficiently processed. Workpiece that matches the frictional force of the object A backup shoe assembly having a number of concave rigid surfaces for use, or an additional tape holding device capable of responding to changes in the frictional force when the frictional force of the workpiece changes, and an additional tape holding device A tape wrap device having a backup shoe assembly having a concave rigid surface, which eliminates the need for any drive / control device and reduces costs, has been provided. In addition, the present invention provides a tape wrap device having a backup shoe assembly having a concave rigid surface that extends the life by about twice as compared with a conventional grindstone insert.

FIG. 5A is a tape wrap device according to the second embodiment of the second invention of the backup shoe assembly having the concave rigid surface of FIG. 1, and a fine hole is formed in the concave rigid surface 4 of the backup shoe assembly 5. Carbide formed with fine irregularities 24 including machining, and electrodeposited with carbide abrasive grains 14 containing diamond on fine irregularities 24 including minute hole machining on concave rigid surface 4 of backup shoe assembly 5 Abrasive electrodeposition layer 16 is provided to prevent slipping by sharp corners 25 of fine irregularities 24 including fine drilling and irregularities 15 having sharp corners of carbide abrasive grains 14 containing each diamond. Thus, even if the frictional force changes due to the difference in either the material of the surface of the rotating shaft of the workpiece, the rotational speed of the rotating shaft of the workpiece, or the particle size of the coated surface of the tape abrasive material, slippage does not occur more and the workpiece A stable machined surface that satisfies the rotational axis surface accuracy of the workpiece is effective. It was intended to provide a tape wrap system having a backup shoe assembly having a concave rigid surface can be processed to.

1 is a schematic side view of a main part of a tape wrap apparatus having a backup shoe assembly having a concave rigid surface according to an embodiment of the present invention. The principal part top view of FIG. (A) is an enlarged top view of one embodiment of the first invention of the backup shoe assembly having the concave rigid surface of FIG. 1, (b) is a side view of (a), and (c) is of (b). The elements on larger scale of A part. (A) is an enlarged top view of one second embodiment of the backup shoe assembly having the concave rigid surface of FIG. 1, (b) is a side view of (a), and (c) is of (b). The elements on larger scale of the B section. (A) is an enlarged top view of a second embodiment of the second invention of the backup shoe assembly having the concave rigid surface of FIG. 1, (b) is a side view of (a), and (c) is (b) FIG.

Explanation of symbols

1: Abrasive-coated tape, 2: Work piece, 3: Rotating shaft surface, 4: Concave rigid surface
5: Backup shoe assembly, 14: Carbide abrasive grain, 15: Concavity and convexity with sharp corners of carbide abrasive grain 16: Carbide abrasive electrodeposition layer, 24: Fine concavity and convexity including fine hole processing
25: Sharp corners of fine irregularities including fine hole machining

Claims (3)

  A workpiece comprising: an abrasive-coated tape; and a backup shoe assembly having a concave rigid surface that contacts and presses the tape-coated material-coated surface against the surface of a rotating shaft of a workpiece such as an automobile part including a crankshaft. In the tape wrap apparatus that is processed by rotating the rotating shaft of the backup shoe assembly, the concave surface of the backup shoe assembly is electroded with a hard abrasive grain containing diamond, and the concave surface of the concave surface is formed with irregularities having sharp corners. A tape wrap device formed to prevent slipping.   A workpiece comprising: an abrasive-coated tape; and a backup shoe assembly having a concave rigid surface that contacts and presses the tape-coated material-coated surface against the surface of a rotating shaft of a workpiece such as an automobile part including a crankshaft. In the tape wrap apparatus that is processed by rotating the rotary shaft of the back-up shoe assembly, fine concaves and convexes including fine holes are formed on the concave rigid surface of the backup shoe assembly, and the fine concaves and convexes including the fine holes are formed. A tape wrap device characterized by preventing slipping by a sharp corner. Sharp corners of the fine irregularities including the fine holes are formed by electrodepositing carbide abrasive grains including diamond on the concave rigid surface of the backup shoe assembly including the fine irregularities including the fine holes. 3. A tape wrapping apparatus according to claim 2, wherein slippage is prevented by means of the ridges and recesses having sharp corners of the carbide abrasive grains containing each of the diamonds.

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