JP2007000947A - Tape lapping device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tape lapping device, making a comparatively rigid recessed surface of a shoe assembly accurately coincide with the surface of a workpiece, not requiring for a worker to manually make a fine adjustment for the position of the shoe assembly to an opening and closing arm in each workpiece, and having an automatic fine adjustment mechanism for making the comparatively rigid recessed surface of the shoe assembly accurately coincide with the surface of the workpiece. <P>SOLUTION: The respective shoe assemblies 2, 2 are supported on the paired opening and closing arms 1, 1, to rock in the axial direction 14 of the workpiece 3 to the respective opening and closing arms 1, 1, and also move in the axial direction 15 of the fulcrum pins 4, 4 with a clearance gap α by the paired fulcrum pins 4, 4 fixed to the shoe assemblies 2, 2 having the comparatively rigid recessed surfaces 2a, 2a. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a relatively incompressible abrasive-coated tape and a relatively rigid material that comes into contact with and presses the surface of a workpiece such as a steel pipe or an automobile part having a processed surface that is rotated. The present invention relates to a tape wrap apparatus comprising a shoe assembly having a concave surface and micro-finishing the surface of a work piece with high precision using an abrasive-coated tape.

It consists of a conventional relatively incompressible abrasive-coated tape and a pair of shoe assemblies having a rigid concave surface that presses the tape-coated surface in contact with the workpiece surface. An example of a tape wrap device that microfinishes the surface of a workpiece extremely precisely is disclosed in Patent Document 1, for example. This is a honing grindstone that uses polyester tape as the abrasive covering tape, and the concave surface of the shoe assembly is relatively rigid (the rigid surface has a hardness exceeding the value of 90 durometer A) and is precisely processed. It is known to use an insert stone made of a material and precisely transfer a stone arc surface processed with a jig borer to the surface of the workpiece with high precision. Also, as a film wrap device that finishes the surface of a work piece that does not require relatively high precision, the abrasive coating tape is made of a relatively compressible plastic film, and each stone uses an insert made of an elastomer material. What was done is also known. Further, FIG. 12 of Patent Document 1 discloses a shoe assembly supporting member that supports a shoe assembly having a concave surface with a pair of loading pins and is swingably attached in the axial direction of the workpiece. ing.
Japanese Patent Publication No. 5-9225

  A relatively rigid concave surface of the shoe assembly is brought into contact with the surface of a workpiece such as an automobile part having a conventional processed surface to be rotated through a tape abrasive coating surface and pressed, and the processed surface is rotated. In a tape lapping machine that micro-finishes the surface of the work piece very precisely, the concave surface of the shoe assembly is relatively rigid, so it will not match the work piece surface exactly because it hits one piece during processing. When not, the operator finely adjusts the position of the shoe assembly with respect to the open / close arm for each workpiece so that the concave surface of the shoe assembly accurately matches the surface of the workpiece.

  An object of the present invention is to press and press a relatively rigid concave surface of a shoe assembly through a tape abrasive covering surface on a workpiece surface such as an automobile part having a rotated processing surface. In the tape wrapping device that micro-finishes the surface of the work piece with very high precision, the relatively rigid concave surface of the shoe assembly can accurately match the surface of the work piece. Tape wrap having an automatic fine adjustment mechanism that does not require the operator to fine-tune the position of the shoe assembly relative to the open / close arm, so that the relatively rigid concave surface of the shoe assembly exactly matches the workpiece surface. To provide an apparatus.

  For this reason, the present invention is fixed to a relatively incompressible abrasive-coated tape and a pair of opening and closing arms that contact and press the abrasive-coated surface of the tape against the workpiece surface of a shaft object such as a crankshaft. In a tape wrap device comprising a shoe assembly having a relatively rigid concave surface, the relatively rigid concave surface is a honing grindstone material whose rigid surface has a hardness exceeding a value of 90 durometer A and is precisely machined. A shoe having a relatively rigid concave surface, which is formed by embedding the formed insert stone in the shoe assembly at intervals in the circumferential direction, or by forming a urethane shoe concave surface integrated with the shoe assembly. A pair of fulcrum pins fixed to the assembly allow each shoe assembly to swing in the axial direction of the workpiece and move in the axial direction of the fulcrum pin with respect to each open / close arm. It has solved the problems of the conventional products described above by providing a tape wrap system, characterized in that supported on the pair of opening and closing arms have.

  With this configuration, in the present invention, the pair of fulcrum pins fixed to the shoe assembly having a relatively rigid concave surface allows each shoe assembly to swing in the axial direction of the workpiece with respect to each opening and closing arm. Since the fulcrum pin is supported by the pair of opening and closing arms so as to be movable in the axial direction, the relatively rigid concave surface of the shoe assembly can accurately match the surface of the workpiece, Automatic fine adjustment mechanism that does not require the operator to fine-tune the position of the shoe assembly with respect to the open / close arm for each workpiece, so that the relatively rigid concave surface of the shoe assembly exactly matches the workpiece surface. The tape wrap apparatus which has this was provided.

  Preferably, the pair of fulcrum pins fixed to the shoe assembly includes a cylindrical portion on the outer side, and an inwardly inclined flattening portion provided with a parallel flattening portion inclined on the cylindrical portion following the cylindrical portion. A pair of elongated holes for inserting the pair of fulcrum pins are provided at each end of the U-shaped cross section of the shoe assembly support member of the open / close arm, and the elongated holes are formed outwardly of the fulcrum pins. An outer wide groove into which the cylindrical portion is inserted, and an inner narrow groove having a width of the inner inclined flattening portion are formed inward.

  An example of the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 is a schematic side view of an essential part of an opening / closing arm of a tape wrap device according to an embodiment of the present invention and a shoe assembly having a pair of relatively rigid concave surfaces supported by the opening / closing arm. FIG. 3 is an enlarged elevation view of the main part of the vicinity of the tip of the shoe assembly in part A in FIG. 1, and the solid line in FIG. 4 (a) is the shoe assembly support member in FIG. A two-dot chain line indicates a state in which the shoe assembly is attached, (b) is a shoe assembly in which a pair of fulcrum pins in FIG. 3 is fixed, and (c) is a partial side view as viewed from the C direction in (a). The state which a fulcrum pin is attached is shown.

  As shown in FIGS. 1 to 4, the tape wrap device 11 according to the embodiment of the present invention includes a relatively incompressible abrasive-coated tape 5 (a relatively compressible polyester tape may be used), A shoe assembly having a relatively rigid concave surface 2a, 2a fixed to a pair of open / close arms 1, 1 that press the abrasive material-coated surface of the tape 5 in contact with the surface of a workpiece 3 such as a crankshaft 10 In the tape wrap apparatus 11 including 2 and 2, the relatively rigid concave surfaces 2a and 2a are inserts formed of a honing grindstone material whose rigid surface has a hardness exceeding the value of 90 durometer A and is precisely machined. It is formed by embedding stones 12 in the shoe assemblies 2 and 2 at intervals in the circumferential direction (it may be formed by a urethane shoe concave surface integrated with the shoe assembly), and relatively rigid concave surfaces 2a and 2a are formed. The shoe assembly The pair of fixed fulcrum pins 4 and 4 allow the shoe assemblies 2 and 2 to swing in the axial direction of the work piece 3 and move in the axial direction of the fulcrum pins 4 and 4 with respect to the open / close arms 1 and 1, respectively. The pair of opening and closing arms 1 and 1 are supported with a gap α as much as possible. The crankshaft 10 which is the workpiece 3 includes a head center 52 rotatably supported by a head stock (not shown) attached to a tape wrap device main body (not shown) and a tail center 51 rotatably supported by a tail stock (not shown). And is centered and rotated.

  With this configuration, the shoe assemblies 2 and 2 are attached to the open / close arms 1 and 1 by the pair of fulcrum pins 4 and 4 fixed to the shoe assemblies 2 and 2 having the relatively rigid concave surfaces 2a and 2a. Since the workpiece 3 is supported by the pair of opening and closing arms 1 and 1 with a gap α so as to be swingable in the axial direction of the workpiece 3 and movable in the axial direction of the fulcrum pins 4 and 4, the pair of opening and closing arms 1 and 1 The relatively rigid concave surface 2a supported by the opening and closing arms 1, 1 so that the relatively rigid concave surfaces 2a, 2a of the shoe assemblies 2, 2 exactly match the surface of the work piece 3 when is closed. , 2a, the shoe assemblies 2 and 2 are smooth and oscillate in the axial direction 14 of the workpiece 3 and move in the axial direction 15 of the fulcrum pins 4 and 4 without hitting the workpiece 3 The workpiece 3 can be gripped in the process. Therefore, it is not necessary for the operator to fine-tune the positions of the shoe assemblies 2 and 2 with respect to the open / close arms 1 and 1 for each workpiece, and a pair of fulcrum pins 4 fixed to the shoe assemblies 2 and 2 are provided. 4 automatically adjusts each shoe assembly 2 and 2 so that it can swing in the axial direction 14 of the work piece 3 and move in the axial direction 15 of the fulcrum pins 4 and 4 with respect to the respective opening and closing arms 1 and 1 Thus, a tape wrap apparatus having an automatic fine adjustment mechanism is provided.

  In the embodiment of the present invention, as shown in FIG. 4, the pair of fulcrum pins 4, 4 fixed to the shoe assemblies 2, 2 are inclined outwardly into the cylindrical portion 41 and the cylindrical portion 43 following the cylindrical portion 41. A pair of inwardly inclined flattened portions 42 provided with parallel flattened portions 42, and a pair of shoe assembly support members 6 and 6 of the opening and closing arms 1 and 1 having a U-shaped cross section, A pair of long holes 50 and 50 for inserting the fulcrum pins 4 and 4 are provided, and each of the long holes 50 has an outer wide groove 51 for inserting the cylindrical portion 41 of each fulcrum pin 4 and 4 and an inner side. And an inner narrow groove 52 having a width of the inner inclined flattening portion 42. β is a longitudinal gap between the shoe assembly support member 6 and the shoe assembly 2. With this configuration, when the pair of opening and closing arms 1 and 1 are opened, the pair of fulcrum pins 4 and 4 fixed to the shoe assemblies 2 and 2 are provided with the cross-section U of the shoe assembly supporting member 6 of the opening and closing arms 1 and 1. The shoe assemblies 2 and 2 are inclined (approximately 45 ° in the embodiment) into the elongated holes 50 and 50 of the respective end portions 7 and 7 of the character shape, and the inner inclined flattening portion 42 is inserted into the inner narrow groove 52. By setting the shoe assemblies 2 and 2 to their original positions, the shoe assemblies 2 and 2 are inserted into the narrow holes 52 of the long holes 50 and 50 of the shoe assembly support member 6 and the fulcrum pins 4 and 4 The cylindrical part 43 following the cylindrical part 41 is supported, and the shoe assemblies 2 and 2 can be easily attached to the shoe assembly support member 6.

The main part schematic side surface which shows the shoe assembly which has a pair of comparatively rigid concave surface supported by the opening-and-closing arm of the tape wrap apparatus of embodiment of this invention and an opening-and-closing arm is shown. The principal part partial top view seen from the upper surface B direction of FIG. 1 is shown. FIG. 2 is an enlarged elevation view of a main part in the vicinity of a tip end portion of a shoe assembly in part A of FIG. The solid line in (a) shows the shoe assembly support member of FIG. 3, the two-dot chain line shows the state where the shoe assembly is attached, and (b) shows the shoe assembly with the pair of fulcrum pins fixed in FIG. ) Shows a state in which the fulcrum pin is attached in a partial side view as viewed from the C direction of (a).

Explanation of symbols

1: Opening / closing arm 2: Shoe assembly 2a: Relatively rigid concave surface 3: Workpiece 4: Support pin 5: Abrasive coating tape 6: Shoe assembly support member 7: U-shaped end 14: Workpiece Axial direction of object 15: Axial direction of fulcrum pin
41: Cylindrical part 42: Flat part 43: Cylindrical part following cylindrical part 41
50: Long hole at the end of U-shaped section 51: Wide outer groove 52: Narrow groove in the inside

Claims (2)

  A relatively incompressible abrasive-coated tape, and a relatively rigid concave surface fixed to a pair of opening and closing arms that press the abrasive-coated surface of the tape into contact with the surface of a workpiece such as a crankshaft. And a relatively rigid concave surface comprising an insert stone formed of a precisely machined honing stone material having a hardness exceeding 90 durometer A. A pair formed by embedding in the shoe assembly at intervals in the circumferential direction, or formed by a urethane shoe concave surface integrated with the shoe assembly, and fixed to the shoe assembly having the relatively rigid concave surface. The fulcrum pins allow each shoe assembly to swing with respect to each open / close arm in the axial direction of the workpiece and move in the axial direction of the fulcrum pins with a gap. Tape wrap system, characterized in that supported on the closed arms.   The pair of fulcrum pins fixed to the shoe assembly has an outer cylindrical portion and an inward inclined flattening portion provided with a parallel flattening portion inclined to the cylindrical portion following the cylindrical portion, and the opening and closing A pair of elongated holes for inserting the pair of fulcrum pins are provided at each end of the U-shaped cross section of the shoe assembly support member of the arm, and each elongated hole has a cylindrical portion of each fulcrum pin outward. 2. The tape wrap apparatus according to claim 1, further comprising an outer wide groove to be inserted and an inner narrow groove having a width of the inner inclined flattening portion on the inner side.

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