JP4428570B2 - Tape wrap device - Google Patents

Description

  The present invention relates to an incompressible abrasive-coated tape, and a shoe having a rigid concave surface that is brought into contact with and pressed against the surface of a workpiece such as a steel pipe or automobile part having a processed surface on which the tape-coated abrasive coated surface is rotated. The present invention relates to a tape wrap apparatus comprising an assembly and micro-finishing the surface of a work piece using an abrasive-coated tape.

A conventional non-compressible abrasive-coated tape and a pair of shoe assemblies having a rigid concave surface that contacts and presses the tape abrasive-coated surface against the workpiece surface. An example of a tape wrap device that microfinishes the surface of a workpiece with high precision is disclosed in Patent Document 1, for example. This is a honing grindstone material that uses polyester tape as the abrasive covering tape, and the concave surface of the shoe assembly has rigidity (the rigid surface has a hardness exceeding the value of 90 durometer A) and is precisely processed. It is known to use a formed insert stone and precisely transfer a stone arc surface processed with a jig borer to a workpiece surface with high precision. Further, in FIG. 12 of Patent Document 1, a shoe assembly supporting member supports a shoe assembly having a concave surface with a pair of loading pins, and an insert stone 38 of the shoe assembly is arranged around the axis of the loading pin. What is made rotatable is disclosed.
Japanese Patent Publication No. 5-9225

  The surface of the workpiece, such as an automobile part having a conventional rotating workpiece surface, is pressed by contacting and pressing the rigid concave surface of the shoe assembly through the tape abrasive coating surface and rotating the workpiece surface. In a tape wrap device that microfinishes the surface of the work piece very precisely, the concave surface of the shoe assembly has rigidity, so it hits the piece during processing and does not exactly match the work piece surface. 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 a rigid concave surface of a shoe assembly through a tape abrasive covering surface and press the surface of a workpiece such as an automobile part having a rotated processing surface and rotate the processing surface. Thus, in a tape wrap device that micro-finishes the surface of the workpiece very precisely, the rigid concave surface of the shoe assembly can accurately match the surface of the workpiece, and a shoe for the open / close arm for each workpiece. To provide a tape wrap device having an automatic fine adjustment mechanism that does not require an operator to finely adjust the position of the assembly by hand, and that the rigid concave surface of the shoe assembly exactly matches the surface of the workpiece. is there.

For this reason, the present invention provides an incompressible abrasive-coated tape and a U-unit fixed to the inside of a pair of opening and closing arms that contact and press the abrasive-coated surface of the tape against the surface of a workpiece such as a crankshaft. In a tape wrap device including a shoe assembly supported by a pair of fulcrum pins on a leg portion of a letter-shaped shoe assembly support member ,
The shoe assembly has a concave surface inside;
The inner concave surface of the shoe assembly is spaced apart in the circumferential direction by an insert stone having a rigid concave surface formed of a precisely machined honing stone material having a surface hardness exceeding 90 durometer A. Embedded
The pair of fulcrum pins are fixed to both sides of the shoe assembly;
Each shoe assembly movably and each shoe assembly with a gap β movable and in the axial direction of the fulcrum pin to the perpendicular longitudinal to the axis of each pair of opening and closing arms against the workpiece is the Solving the problems of the conventional products described above by providing a tape wrap device that is supported by the pair of opening and closing arms with a clearance α between the U-shaped shoe assembly support member and the inside of the leg portion did.

With this configuration, in the present invention, each shoe assembly moves in a vertical direction perpendicular to the workpiece axis with respect to each opening / closing arm by a pair of fulcrum pins fixed to both sides of the shoe assembly having a rigid concave surface. Supported with possible gap β ,
And the shoe assembly has a concave surface inside,
The inner concave surface of the shoe assembly is spaced apart in the circumferential direction by an insert stone having a rigid concave surface formed of a precisely machined honing stone material having a surface hardness exceeding 90 durometer A. Embedded
The pair of fulcrum pins are fixed to both sides of the shoe assembly;
Each shoe assembly is supported by the pair of opening and closing arms with a clearance α between the U-shaped shoe assembly support member and the inner side of the leg portion so as to be movable in the axial direction of the fulcrum pin. Since it is supported so as to be movable in the axial direction,
The rigid concave surface of the shoe assembly can accurately match the surface of the work piece, and there is no need for the operator to fine-tune the position of the shoe assembly relative to the open / close arm for each work piece. It has become possible to provide a tape wrap apparatus having an automatic fine adjustment mechanism in which a three-dimensional rigid concave surface exactly matches a workpiece surface.

Preferably, the pair of fulcrum pins fixed to the shoe assembly includes a cylindrical portion on the outer end portion side, and a pair of the fulcrum pins inclined to a vertical plane perpendicular to the workpiece axis on the cylindrical portion following the cylindrical portion. A pair of elongated holes into which the pair of fulcrum pins are inserted, and each of the elongated holes is provided on a leg portion of the U-shaped shoe assembly supporting member. It is preferable to have an outward wide groove into which the cylindrical portion of each fulcrum pin is inserted outward and an inward narrow groove with a width of the pair of parallel flattening portions inward.

  An example of the best mode for carrying out the present invention will be described with reference to the drawings. FIG. 1 shows a schematic side view of a main 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 rigid concave surfaces supported by the opening / closing arm, and FIG. 2 shows an upper surface B of FIG. FIG. 3 is an enlarged elevational view of the main part of the vicinity of the tip of the shoe assembly in part A of FIG. 1, and the solid line in FIG. 4 (a) is the shoe assembly support member in FIG. A dotted 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 fulcrum pin in a partial side view as viewed from the C direction of (a). The state where 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 an incompressible abrasive-coated tape 5, and the abrasive-coated surface of the tape 5 is covered with a shaft object such as a crankshaft 10. A pair of open / close arms 1 that are brought into contact with and pressed against the surface of the workpiece 3 , and U-shaped shoe assembly support members 6, 6 fixed on the inside, and concave surfaces 2 a, 2 a supported by a pair of fulcrum pins 4, 4 Including shoe assemblies 2, 2.
The shoe assemblies 2 and 2 have concave surfaces on the inner side, and the honing grindstone material in which the rigid surface has a hardness exceeding the value of 90 durometer A and is precisely processed on the inner concave surfaces of the shoe assemblies 2 and 2. The insert stones 12 are embedded with a gap in the circumferential direction.
The pair of fulcrum pins 4 and 4 are fixed to both sides of the shoe assemblies 2 and 2,
Each shoe assembly 2, 2 U-shaped shoe assembly workpiece 3 U-shaped shoe in the axial with a gap β movable in perpendicular longitudinal between the legs inside the three-dimensional support member 6,6 The assembly support members 6 and 6 are supported inside the legs .
A crankshaft 10 that is a workpiece 3 includes a head center 52 that is rotatably supported by a head stock (not shown) attached to a main body of a tape wrap device (not shown), and a tail center 51 that is rotatably supported by a tail stock (not shown). And is centered and rotated.

With this configuration, each shoe assembly 2, 2 has a gap β that is movable in the vertical direction perpendicular to the axis of the workpiece 3 between the U-shaped shoe assembly support members 6, 6 and the inside of the legs. Supported on the inner side of the legs of the U-shaped shoe assembly support members 6, 6 ,
The pair of fulcrum pins 4 and 4 are fixed to both sides of the shoe assemblies 2 and 2,
Each shoe assembly 2, 2 has a U-shaped shoe having a gap α that is movable in the vertical direction perpendicular to the axis of the work piece 3 between the U-shaped shoe assembly support members 6, 6 and the inside of the legs. Since it is supported inside the legs of the assembly support members 6, 6 ,
When the pair of opening and closing arms 1 and 1 are closed, the rigid concave surfaces 2a and 2a of the insert stones 12 embedded in the concave surfaces on the inner side of the shoe assemblies 2 and 2 in the circumferential direction are formed on the workpiece. The workpiece 3 can be smoothly gripped without causing a single contact so as to accurately match the surface of the workpiece 3.
For this reason, it is not necessary for the operator to finely adjust the positions of the shoe assemblies 2 and 2 with respect to the open / close arms 1 and 1 for each workpiece 3, and the pair of fulcrum pins 4 fixed to the shoe assemblies 2 and 2. 4, each shoe assembly 2, 2 is automatically finely adjusted so as to be rotatable in the axial direction 14 of the workpiece 3 and movable in the axial direction 15 of the fulcrum pins 4, 4 with respect to the respective open / close arms 1, 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, a pair of fulcrum pins 4, 4 fixed on both sides of the shoe assemblies 2, 2 are provided with a cylindrical portion 41 on the outer end side,
A base portion 43 provided with a pair of parallel flattening portions 42 inclined with respect to a vertical plane perpendicular to the workpiece axis 14 in the cylindrical portion 41;
With a gap β movable in perpendicular longitudinal to the axis of the workpiece 3 U-shaped shoe assembly between the legs inside the U-shaped shoe assembly support members 6 of the opening and closing arms 1,1 Supported on the inside of the legs of the support members 6, 6 ;
The U-shaped shoe assembly support members 6 and 6 are provided with a pair of elongated holes 50 and 50 for inserting the pair of fulcrum pins 4 and 4 at the end portions 7 and 7, respectively. It has the outward wide groove | channel 51 which inserts the cylindrical part 41 of the pins 4 and 4, and the inward narrow groove | channel 52 of the width | variety of a pair of mutually parallel flat part 42. β is a longitudinal gap between the inside of the leg portions of the U-shaped shoe assembly support members 6 and 6 and the shoe assemblies 2 and 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 connected to the U-shaped shoe assembly support member 6 of the opening and closing arms 1 and 1 . The shoe assemblies 2, 2 are inclined in the long holes 50, 50 of the end portions 7, 6 (about 45 ° in the embodiment), and a pair of parallel flattening portions 42 are aligned with the inner narrow groove 52. By inserting the shoe assemblies 2 and 2 into their original positions, the shoe assemblies 2 and 2 are inserted into the narrow inner grooves 52 of the long holes 50 and 50 of the U-shaped shoe assembly support members 6 and 6. The cylindrical portion 43 following the cylindrical portion 41 is supported on the outer end side of each fulcrum pin 4 , 4 , and the shoe assemblies 2, 2 can be easily attached to the U-shaped shoe assembly support members 6, 6.

A main part showing a pair of opening and closing arms of the tape wrap system embodiment of the present invention, the shoe assembly which is supported by a pair of pivot pins on the legs of a pair of opening and closing arms inside fixed U-shaped shoe assembly support member A schematic side view 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. 1. 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).

DESCRIPTION OF SYMBOLS 1, 1: Open / close arm 2, 2: Shoe assembly 2a, 2a: Rigid concave surface 3, 3: Workpiece 4, 4: Support pin 5: Abrasive coating tape 6, 6: U-shaped shoe assembly support member 7, 7: Leg portion 14 of U-shaped shoe assembly support member : Axis 15 of workpiece 15: Axial direction of fulcrum pins 4, 4 41: Cylindrical portion 42: Flattening portion 43: Cylindrical portion 50 following cylindrical portion 41 : Elongated hole 51 at the end of U-shaped cross section: Outer wide groove 52: Inner narrow groove

Claims (2)

Non-compressible abrasive-coated tape, and U-shaped shoe assembly support member fixed to the inside of 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 A tape wrap device including a shoe assembly supported by a pair of fulcrum pins on a leg portion of
The shoe assembly has a concave surface inside;
The inner concave surface of the shoe assembly is spaced apart in the circumferential direction by an insert stone having a rigid concave surface formed of a precisely machined honing stone material having a surface hardness exceeding 90 durometer A. Embedded
The pair of fulcrum pins are fixed to both sides of the shoe assembly;
Each shoe assembly movably and each shoe assembly with a gap β movable and in the axial direction of the fulcrum pin to the perpendicular longitudinal to the axis of each pair of opening and closing arms against the workpiece is the A tape wrap device, wherein the tape wrap device is supported by the pair of opening and closing arms with a clearance α between the U-shaped shoe assembly supporting member and the inside of the leg portion . A pair of fulcrum pins fixed to the shoe assembly includes a pair of parallel pins that are inclined with respect to a vertical surface perpendicular to the workpiece axis on the cylindrical portion on the outer end side and on the cylindrical portion following the cylindrical portion. A leg portion of the U-shaped shoe assembly support member, and a pair of elongated holes into which the pair of fulcrum pins are inserted. 2. The tape wrap according to claim 1, further comprising an outer wide groove into which a cylindrical portion of each fulcrum pin is inserted, and an inner narrow groove having a width of the pair of parallel flattening portions inward. apparatus.

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