JP2002210621A - Tapering assist and tapering method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tapering assist that can position one end of a workpiece with high precision and can facilitate the elimination of runout in rotation when mounted on a tooling machine, and a tapering method that uses the tapering assist. SOLUTION: The tapering assist 1 comprises a body 2 as a base, a work holding part 3 movably held on the body, and a driving part 4 for moving and positioning the work holding part, in which a central axis O of the body and a central axis P of the work holding part form a given angle A. The central axis O of a cylindrical portion 2a of the body and a central axis Q of a cylindrical portion 3a of the work holding part are aligned when a spacer 5 is held between the body and the work holding part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary taper machining tool used for machining a tapered surface of an axis at an end of a workpiece, which is inclined and intersects with a central axis of the workpiece by cutting or grinding. The present invention relates to a tapering method using the auxiliary tool.

[0002]

2. Description of the Related Art In a conventional taper machining method, first, a machining standard is machined on a workpiece 10, and the machining standard is a cylindrical portion 10a of the workpiece 10 as shown in FIG.
Only. Next, as shown in FIG. 2A, the workpiece 10 is attached to a special jig 11 for chucking the processing machine 10 at a predetermined angle A based on a processing standard (cylindrical portion), and then the special jig 11 is attached to the processing machine. Attach to In this case, a measuring instrument is applied to the cylindrical portion 11 a of the dedicated jig 11, the center axis of the chuck of the processing machine is adjusted to coincide with the center axis of the conventional dedicated jig 11, and one end of the workpiece 10 is adjusted. The dedicated jig 11 is chucked to the processing machine by positioning the corner so as to coincide with the rotation center of the processing machine (reference point B in FIG. 2B). Thereafter, tapering is performed in the length direction of one end of the workpiece, and the minimum taper diameter of the workpiece is processed to a predetermined dimension.

However, in the conventional method, the rotation of the dedicated jig 11 is removed (the center axis of the chuck of the processing machine is made to coincide with the center axis of the dedicated jig), and one end of the workpiece is positioned ( (The angle of one end of the workpiece is made coincident with the center of rotation of the processing machine) at the same time, and it takes time. Further, since the processing standard is performed only on the cylindrical portion of the workpiece, the workpiece is There is a problem that the overall length after processing varies.

[0004]

SUMMARY OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to provide a taper capable of positioning one end of a workpiece with high accuracy and capable of easily removing the rotation when mounted on a processing machine. An object of the present invention is to provide a processing assisting tool and to provide a taper processing method capable of reducing variation in the entire length of a workpiece using the assisting tool and performing highly accurate tapering.

[0005]

According to the present invention, there is provided, as a means for solving the above-mentioned problems, a tapering aid and a tapering method described in the claims. The tapering aid according to claim 1, wherein the tapering aid fixed to the chuck of the processing machine is a body serving as a base, a work holding part movably held by the body, and a work holding part. And a drive unit for moving and positioning the workpiece, wherein the central axis of the body and the central axis of the gripping part for holding the workpiece of the work holding part make a predetermined angle, whereby the workpiece is A tapered surface having a surface inclined at a predetermined angle with respect to the central axis of the above can be machined.

According to a second aspect of the present invention, the center axis of the body and the center axis of the gripping portion of the workpiece holding portion form a predetermined angle and intersect with each other. Can be positioned with high accuracy. According to a third aspect of the present invention, the body includes a cylindrical portion centered on the center axis of the body, and the work holding portion also includes a cylindrical portion centered on the center axis of the body. A central axis of the body and a central axis of the cylindrical portion of the work holding portion are aligned in a state where spacers having a predetermined thickness detachably provided between the holding portions are sandwiched therebetween. . Thus, the cylindrical portion provided on the body can be easily chucked to the processing machine, and the cylindrical portion provided on the work holding portion can easily measure and correct the run-out of rotation when the taper processing aid is attached to the processing machine. Like
Rotational runout can be easily reduced, and high-precision taper processing can be obtained.

According to a fourth aspect of the present invention, there is provided a taper machining method according to the first aspect of the present invention, which processes the machining reference of the workpiece and processes the entire length of the workpiece. Using an auxiliary tool, one end of the workpiece is tapered. After processing the entire length of the workpiece with high precision, the tapered work is attached to the tapering auxiliary tool to reduce the variation in the overall length. Both high precision full length and high precision taper surface can be obtained at the same time.

According to a fifth aspect of the present invention, there is provided a taper forming method, wherein a plate is sandwiched between a body and a work holding portion to perform rotation swaying, a work is attached to the work holding portion, and then a spacer is removed to remove the work. Is moved to position one end of the workpiece at a predetermined position. The plate is sandwiched between the body and the work holding portion, and the rotation of the taper processing assisting tool is removed to ensure the body. And the center axis of the cylindrical portion of the work holding portion can be shaken in a state where the center axis coincides with the center axis of the work holding portion, and one end of the workpiece can be positioned with high accuracy. The taper forming method according to claim 6, wherein the distance between the body and the work holding portion is reduced to perform the taper working, the minimum diameter of the taper at one end of the workpiece is measured, and the work holding portion is adjusted so that the minimum taper diameter becomes a predetermined size. Is moved and fixed, and is tapered, whereby a workpiece having a predetermined taper minimum diameter can be tapered.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an exploded perspective view of a tapering aid according to an embodiment of the present invention; FIG. 1 is an overall sectional view of a tapering aid 1 according to an embodiment of the present invention. The taper processing aid 1 includes a body 2 serving as a base, and a work holding portion 3 that is movably and positionably held by the body 2.
A drive unit 4 for moving and positioning the work holding unit 3;
It comprises a spacer 5 detachably provided between the body 2 and the work holding part 3, a guide 6 for guiding the movement of the work holding part 3, and a set screw 7 for positioning and fixing the work holding part 3.

The body 2 is provided with a cylindrical portion 2a centered on the center axis O of the body 2, and a screw hole 2b for guiding the drive portion 4 is inclined at a predetermined angle A with respect to the center axis O. A guide 6 that is bored and guides the movement of the work holding unit 3 is attached in parallel with the screw hole 2b. The front surface 2 c of the body 2 is a plane orthogonal to the guide 6.

The work holder 3 also has a central axis O of the body 2.
And a guide portion 6
3b for inserting the workpiece, a gripping portion 3c for holding the workpiece 10, and a penetrating portion 3 for inserting the driving unit 4.
d are formed in parallel. The rear surface 3e of the work holding part 3 is a flat surface facing the front surface 2c of the body 2. Therefore, the central axis O of the body 2 and the central axis P of the grip 3c form a predetermined angle A. The head 4a of the drive shaft 4 is formed so as to be fitted with a driving body (not shown), and by rotating the driving shaft 4 by the driving body, the work holding unit 3 moves along the driving shaft 4. Can move back and forth. The set screw 7 is provided to fix the work holding unit 3 at a predetermined position.

Between the front surface 2c of the body 2 and the rear surface 3e of the work holding portion 3, a spacer 5 having a predetermined thickness is provided so as to be detachably held, and the spacer 5 is held between the two. At this time, the central axis O of the cylindrical portion 2a of the body 2 and the central axis Q of the cylindrical portion 3a of the work holding portion 3 are aligned.

A tapering method using the tapering aid of the present invention configured as described above will be described.
First, as shown in FIG. 3A, a cylindrical portion 10a serving as a processing reference of the workpiece 10 and one end face 10b are processed by a processing machine (not shown). Next, the processing standard (the cylindrical part 10)
A) is chucked and the other outer diameter is processed into a cylindrical shape, and the entire length is processed into a predetermined length. Next, the body 2 of the tapering aid 1 of the present invention is attached to the chuck of the processing machine.
At this time, the chuck is adjusted so that the center axis of the chuck of the processing machine coincides with the center axis O of the body 2.

This adjustment is performed as follows. A spacer 5 is provided on the body 2 and the work holding portion 3 of the tapering aid 1.
Sandwich. By holding this spacer 5,
The central axis Q of the cylindrical portion 3a of the work holding part 3 and the central axis O of the body 2 match. Next, a measuring instrument (not shown) is brought into contact with the cylindrical portion 3a of the work holding portion 3 to adjust the chuck state of the tapering aid 1. Thereby, the center axis of the chuck of the processing machine coincides with the center axis of the body 2.
In this manner, the work holding portion 3 of the tapering aid 1
Is chucked in a state where there is no deflection of the outer diameter of the cylindrical portion 3a provided in the above.

Next, the workpiece 10 is mounted on the gripping portion 3c of the workpiece 10 of the workpiece holding unit 3 on a processing basis. That is, the end surface 10b of the workpiece 10 is aligned with the rear surface 3e of the work holding portion 3, and the cylindrical portion 10a of the workpiece is aligned with the surface of the grip portion 3c. After that, the spacer 5 is removed, the drive unit 4 is rotated, and the work holding unit 3 is moved,
The workpiece is positioned so that the end opposite to the processing reference side is at a predetermined position, and the work holding unit 3 is fixed with a set screw 7. In addition, the minimum diameter of the tapered portion at one end of the workpiece is measured, and the workpiece holding portion 3 is moved so that the minimum diameter of the tapered portion becomes a predetermined size to position the opposite end of the workpiece (FIG. 2).
(B) Reference line c) and fix.

In the above description, the work 10 is described, but a master work may be used instead of the work. In this case, the attachment of the master work to the work holding unit 3 is performed based on the processing standard of the workpiece. The movement of the work holding unit 3 may be adjusted by the driving unit 4 so that the tip of the attached master work is located at a predetermined position (the reference line c in FIG. 2B).

Next, the workpiece 10 is tapered at its tip by grinding with a grindstone 8. In this case, the taper processing
As shown by the arrow in FIG. 2B, the grindstone 8 moves along the rotation center axis, moves in the radial direction at the position of the minimum diameter of the tapered portion, and thereafter moves inclinedly in the predetermined taper direction. Then, the workpiece 10 is tapered. FIG. 2 (b)
The hatched portion indicates a portion to be removed by the taper processing. In this way, a workpiece having a highly accurate overall length and a highly accurate tapered surface shape is obtained. Although the description has been given of the grinding using the grindstone 8 as a tool, it is obvious that the present invention can also be used for cutting using a cutting tool.

When a master work is used, when the work holding unit 3 is moved and fixed so that the master work is at a predetermined position, the taper processing aid of the present invention is set on a processing machine. After that, the master work may be removed, and the workpiece may be attached to the work holding part on the basis of the processing, and the taper processing may be performed. When mounting the workpiece, it is not necessary to adjust the position of the work holding portion.

In this embodiment, the case where the position of the end of the workpiece to be tapered is known has been described. If the position of the end is unknown, the distance between the workpiece holding unit 3 and the body 2 is temporarily adjusted. The taper processing and the measurement of the minimum diameter of the tapered portion may be repeated to make the minimum diameter of the tapered portion a predetermined size.

[Brief description of the drawings]

FIG. 1 is an overall sectional view of a tapering aid according to an embodiment of the present invention.

FIG. 2 (a) is an explanatory view of a conventional tool for taper processing, and FIG. 2 (b) is an explanatory view of taper processing.

FIG. 3 shows (a) a conventional processing standard and (b) a workpiece.
It is a figure explaining the processing standard of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Auxiliary tool 2 ... Body 2a ... Cylindrical part 3 ... Work holding part 3a ... Cylindrical part 3c ... Grip part 4 ... Drive part 5 ... Spacer 6 ... Guide 7 ... Set screw 8 ... Grindstone O ... Center axis of body P … Central axis of the holding part of the work holding part Q… Central axis of the cylindrical part of the work holding part

 ──────────────────────────────────────────────────の Continuing on the front page (72) Inventor Naoki Itasaka 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Inside Denso Corporation (72) Inventor Tsuyoshi Kagami 1-1-1, Showa-cho, Kariya-shi, Aichi Prefecture Denso Corporation F-term (reference) 3C016 BA02

Claims (6)

[Claims] 1. A taper comprising at least a body fixed to a chuck of a processing machine and serving as a base, a work holding part movably held by the body, and a drive part for moving and positioning the work holding part. A machining assisting tool, wherein a central axis of the body and a central axis of a grip portion of the workpiece holding section for holding a workpiece are at a predetermined angle. 2. The taper working aid according to claim 1, wherein a center axis of the body and a center axis of a grip portion of the work holding portion form a predetermined angle and intersect. 3. The body has a cylindrical portion centered on the center axis of the body, and the work holding portion also has a cylindrical portion centered on the center axis of the body. When a spacer having a predetermined thickness detachably provided between the body and the work holding portion is sandwiched between the body and the work holding portion, a center axis of the body and a cylinder of the work holding portion are provided. The taper machining aid according to claim 1, wherein the central axis of the portion is coincident with the center axis. 4. A method of tapering a workpiece using the tapering aid according to any one of claims 1 to 3, wherein: (1) a processing reference of the workpiece; A machining step; (2) a full-length machining step of machining the entire length of the workpiece; and (3) a taper machining step of tapering one end of the workpiece using the taper machining aid. A taper processing method characterized by the above-mentioned. 5. The taper machining step includes: (4) clamping the spacer between the body and the work holding unit to perform rotation deflection; and (5) placing a workpiece on the work holding unit. The mounting step according to claim 4, further comprising: (6) removing the spacer, moving the work holding part, and positioning one end of the workpiece at a predetermined position. Taper processing method. 6. The tapering step includes: (7) tapering by adjusting a distance between the body and the work holding portion, measuring a minimum diameter of the tapered portion at one end of the workpiece, and 6. The method according to claim 5, further comprising the step of moving and fixing the work holding portion so that the small diameter becomes a predetermined size and performing taper processing.