JP2000108005A - Shoe assembly for film lapping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the shoe assembly of a film lapping device for automatically and continuously flowing together two kind workpieces different in diameters through stepless replacement, and eliminating a step replacing time. SOLUTION: A pair of shoe assemblies 30 has at least a pair of small diameter stones 31 having a small diameter circular arc surface conforming to a small diameter circular arc in the inside, and at least two pairs of large diameter stones 32 having a large diameter circular arc surface conforming to a large diameter circular arc arranged in the outer side of the stones 31. Since the assemblies 30 are automatically aligned, two kind shafts 34 and 35 to be worked, can be automatically and continuously worked in stepless replacement by using a diameter-adaptable two-step curvature shoe.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shoe assembly of a film wrap apparatus for micro-finishing the surface of a processed shaft, and more particularly to a shoe assembly of a film wrap apparatus for micro-finishing the surface of a processed shaft very precisely.

[0002]

2. Description of the Related Art As a conventional film wrapping device for micro-finishing the surface of a processed shaft, for example, Japanese Patent Publication No. 5-9225
As disclosed in Japanese Unexamined Patent Publication, an apparatus for holding an abrasive coated tape, and a plurality of fixed arc surfaces having a fixed arc surface for pressing the tape abrasive surface in contact with the tape back surface so as to contact the surface of the shaft to be processed. A pair of shoe assemblies on which stones are formed, a device for performing relative rotation between the workpiece shaft and the shoe assembly, and a device for rotating the workpiece shaft with respect to the shoe assembly. There is a film wrap device having an arm for supporting the shoe assembly so that a relative movement between a processing shaft surface and a tape abrasive material surface is performed. In this method, the abrasive coated tape is made of relatively incompressible polyethylene, and each stone uses an insert made of rigid and precisely machined honing stone material, and is extremely precise with a jig borer. It is known to precisely transfer a stone arc surface machined to a shaft to be processed. In addition, as a film wrapping device for finishing the surface of a shaft to be processed which does not require relatively high precision, the abrasive coated tape is made of a relatively compressible plastic film, and each of the stones uses an insert formed of an elastomer material. Is known.

[0003]

In such a conventional film wrapping apparatus for micro-finishing the surface of a processed shaft, for example, when performing a film wrapping step as a final step of a crankshaft, two kinds of works having different diameters are caused to flow together. In the line, it was necessary to change the shoe assembly in which a plurality of stones were formed according to the diameter of the work. Since the replacement of the shoe assembly is necessary for each finished bearing surface of the crankshaft, the changeover time is long, which has been a factor of lowering the operation rate of the film wrap device.
As shown in FIG. 3, each stone 3 of the shoe assembly of the conventional film wrapping device is manufactured according to the diameter of the work.
Since the machining is limited to only the diameter, if the diameter of the work is different, it is necessary to change the setup for exchanging a shoe assembly having a plurality of dedicated stones. An object of the present invention is to provide a shoe assembly of a flexible film wrap device that can automatically and continuously process by stepless replacement using a diameter-compatible two-step curvature shoe that can flow two types of workpieces having different diameters. Is to provide.

[0004]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an apparatus for holding an abrasive-coated tape, and to press the abrasive surface of the tape in contact with the back surface of the tape so as to contact the surface of the shaft to be processed. A pair of shoe assemblies in which a plurality of stones having a fixed arc surface are formed, a device for performing relative rotation between the processed shaft and the shoe assembly, and wherein the processed shaft is An arm for supporting the shoe assembly so that relative movement between the surface of the processed shaft and the surface of the tape abrasive material is performed when the film is rotated. In the shoe assembly, the pair of shoe assemblies has at least a pair of small-diameter stones having a small-diameter circular arc surface matching the small-diameter circular arc on the inside, and a large-diameter circular arc arranged outside the small-diameter stone. At least two pairs of large-diameter stones having a large-diameter circular arc surface, and two types of processing shafts are automatically connected continuously without step change using a shoe assembly in which a diameter-corresponding two-step curvature shoe is formed. The object of the prior art described above has been solved by providing a shoe assembly of a film wrap device characterized in that the shoe assembly can be processed.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to FIGS. FIG. 1 is a side view of a main part of a shoe assembly in which a plurality of diameter-corresponding two-step curvature shoes are formed in a film wrapping device according to an embodiment of the present invention. FIG. 2 uses the shoe assembly of the film wrapping device in FIG. FIG. 7 is a block diagram showing a film wrapping process which is a final process of the crankshaft to be performed. As shown in FIG. 2, the crankshaft 10 comprises a headstock 13 for rotating it about a longitudinal central axis.
And tailstock 14 at both ends. In the film wrapping process of microfinishing the crankshaft 10 of FIG. 2, the nine cylindrical bearing surfaces provide four pin bearings 12 coupled to the piston connecting rod and the crankshaft 10 rotatable in the engine block. It consists of five main bearings 11 to support. FIG. 2 shows only one of the pin bearings 12 in a state where the shoe assembly 1 is mounted on the arm 15 to perform film wrapping. However, in an actual film wrapping apparatus, nine shoe assemblies 1 are naturally mounted on the arm 15. The film wrapping is performed on the four pin bearings 12 and the five main bearings 11 at the same time.

[0006] Each shoe assembly 1 is a conventional shoe assembly 1.
As shown in FIG. 3, a plurality of sets of stones 3 having a fixed arc surface 37 that is in contact with the back surface 21 of the abrasive-coated tape 20 and presses the tape abrasive surface 19 to contact the surface of the shaft 2 to be processed. It consists of a pair of shoe assemblies 1 attached.
Reference numeral 17 denotes a return roller rotatably supported by a flange 16 fixed to the arm 15, and reference numeral 18 denotes a guide roller rotatably supported by the arm 15. Reference numeral 23 denotes a pin, which supports a shoe frame 24 on which a plurality of stones 3 are attached to the arm connecting member 22 so as to be slightly movable in the circumferential direction of the pin. Tape 20
A film roll of a device for holding an abrasive coated tape (not shown) is brought into contact with the surface of the processing shaft 2 via a guide roller 18 via a guide roller 18 to perform film wrapping, and the tape 20 is then processed again via a return roller 17. The film is wrapped by being brought into contact with the surface of the shaft 2, and the guide roller
It is taken up by a film take-up device (not shown) via 18 and dropped into a dust box (not shown). The headstock 13 rotates the crankshaft 10 about the longitudinal center axis, and the relative rotation between the workpiece shaft 2 and the shoe assembly 1 is performed.

[0007] As shown in FIG. 1, a pair of shoe assemblies formed with a pair of shoe assemblies formed with a diameter-matching two-step curvature shoe of the film wrap device according to one embodiment of the present invention are divided into a pair (split in two). The shoe assembly 30 may be, for example, two pairs or more.
A pair of small-diameter stones 31 having a small-diameter circular arc surface matching the small-diameter circular arc inside, and a pair of small-diameter stones having a large-diameter circular arc surface matching the large-diameter circular arc arranged outside the small-diameter stone 31 (split into two parts) And four types of large diameter stones 32, and two types of processing shafts 34, 35 can be changed steplessly by using a pair of shoe assemblies 30 in which a diameter-corresponding two-stage curvature shoe is formed. This enables automatic continuous processing. FIG. 1A shows a state in which a large-diameter work shaft 34 is pressed by two pairs of large-diameter stones 32 having a large-diameter arc surface, and FIG. 1B shows a state in which a small-diameter work shaft 35 is pressed against a small-diameter arc surface. This shows a state in which a pair of small-diameter stones 31 having pressing are pressed. Each stone 31, 32 and each work axis 3
A tape 20 similar to the pair of shoe assemblies 1 shown in FIG. Since the pair of shoe assemblies 30 of the present invention are self-aligning, two types
It provides a flexible film wrap device shoe assembly that can automatically and continuously process 34 and 35 without step change, eliminating the changeover time and increasing the operation rate of the film wrap device. .

Preferably, the abrasive coated tape 20 is made of relatively incompressible polyethylene terephthalate,
31, 32 is rigid and by using inserts formed of precision machined honing stone material,
It is possible to precisely transfer the stone arc surface processed extremely precisely by the jig borer to the surface of the shaft to be processed. In a film wrapping machine for finishing the surface of a shaft to be processed which does not require relatively high precision, the abrasive coating tape 20 is made of a relatively compressible plastic film, and each of the stones 31,
32 may use an insert formed of an elastomeric material.

[0009]

As described above, at least one pair of shoe assemblies 30 according to the present invention are disposed outside the small-diameter stone 31 and a pair of small-diameter stones 31 having a small-diameter circular arc surface that matches the small-diameter circular arc inside. And at least two pairs of large-diameter stones 32 having a large-diameter arc surface that matches the large-diameter arc, and the pair of shoe assemblies 30 are self-aligned. The present invention provides a flexible film wrap device shoe assembly that can automatically and continuously obtain the same surface roughness as that of the prior art by using a two-step curvature shoe corresponding to a diameter without step change. Man-hours,
This saves setup time and increases the operating rate of film wrapping equipment.

[Brief description of the drawings]

FIG. 1 is a side view of a main part of a pair of shoe assemblies formed with a two-step curvature shoe corresponding to a diameter of a film wrap device according to an embodiment of the present invention. (B) shows a state of pressing with two pairs of large-diameter stones 32 having a circular arc surface.
Shows a state in which the small-diameter work shaft 35 is pressed by a pair of small-diameter stones 31 having a small-diameter arc surface.

FIG. 2 is a block diagram showing a film wrapping process which is a final process of a crankshaft in which the shoe assembly of the film wrapping device of FIG. 1 is used.

FIG. 3 is a side view of a main part of a shoe assembly of a conventional film wrapping apparatus, showing a state in which a film wrapping process is performed.

[Explanation of symbols]

 30. Shoe assembly 31. Small diameter stone 32. Large diameter stone 34. Large diameter machined shaft 35. Small diameter machined shaft

Claims (3)

[Claims] An apparatus for holding an abrasive coated tape and a plurality of stones having a fixed arc surface that contacts the back surface of the tape and presses the tape abrasive surface into contact with the shaft surface to be processed. A pair of shoe assemblies,
A device for causing relative rotation between the work shaft and the shoe assembly, and a device for rotating the work shaft between the work shaft surface and the tape abrasive material surface when the work shaft is rotating with respect to the shoe assembly. An arm for supporting the shoe assembly so that relative movement is performed. A shoe assembly of a film wrap apparatus for microfinishing a shaft surface to be processed, the pair of shoe assemblies conforming to a small-diameter arc inward. At least one pair of small-diameter stones having a small-diameter arc surface, and at least two pairs of large-diameter stones having a large-diameter arc surface that matches the large-diameter arc disposed outside the small-diameter stone, comprising two types of coated stones. A shoe assembly for a film wrap device, wherein a processing shaft can be automatically and continuously processed without step change using a shoe assembly having a two-step curvature shoe corresponding to a diameter. 2. The abrasive coated tape is made of relatively incompressible polyethylene, and each of the stones is an insert formed of a rigid and precision machined honing stone material. The shoe assembly of a film wrap device according to claim 1, wherein 3. The film wrapping device according to claim 1, wherein said abrasive coated tape is made of a relatively compressible plastic film, and each said stone is an insert formed of an elastomeric material. Shoe assembly.