JP4623262B2 - Tapering gauge - Google Patents

Description

  The present invention relates to a taper gauge that measures the outer peripheral taper surface of a collet.

  There exists a thing of patent document 1 as what was equipped with the collet which the outer periphery becomes a taper surface and the wrinkle is formed in the small diameter edge part. In this collet, a large number of rods inserted into the collet center hole were inserted between the outer peripheral tapered surface and the inner peripheral tapered surface by a transmission having an inner peripheral tapered surface facing the outer peripheral tapered surface of the collet from the outside. A rod is fixed at a predetermined position by reducing the diameter via a ball. The collar (upper flange) of the collet prevents the ball from slipping out between the outer peripheral tapered surface and the inner peripheral tapered surface. Japanese Patent Application Laid-Open No. H10-228707 shows a fitting in which a receiving ring for receiving a ball is fitted to the small diameter end of the collet.

  Non-Patent Document 1 describes a general taper gauge. When inspecting the taper of a taper product, a taper product thinly and evenly coated with a blue paste (Komitan) is placed in the taper gauge. It is disclosed that, after rotating and extracting, the winning determination is made according to the state where the blue paste is rubbed. Further, Non-Patent Document 2 discloses a method of measuring with a roller gauge, a block gauge, and a micrometer as a measuring method of the taper plug gauge, and a method of measuring with a sine block and a dial gauge with a stand.

Since the collet of the above-mentioned patent document 1 is provided with a ridge at the small diameter end portion, when inspecting the outer peripheral tapered surface of the collet, a taper gauge is fitted and inspected as described in non-patent document 1 for the ridge. I can't. For this reason, it cannot be measured whether substantially the entire outer peripheral tapered surface is formed as expected. Moreover, in the thing of patent document 2, since the wrinkle is not formed in the small diameter end part, the whole taper surface can be inspected with a taper gauge. When the work support is arranged so that the end and the ring are loosely fitted and the support rod is advanced and retracted in a direction other than upward, the ball may come off together with the ring. In order to prevent this, if a collar is provided at the small-diameter end of the collet, the entire surface of the outer peripheral tapered surface cannot be reliably inspected as in Patent Document 1. Further, although the outer peripheral tapered surface can be measured as described in Non-Patent Document 2, this method has a troublesome problem because it requires a plurality of measuring tools such as a block gauge.
JP-A-10-146733 Japanese Patent Laying-Open No. 2003-307205 (FIG. 1) Plain gauging system, [online], Daiichi Kensaku Co., Ltd., [Search on February 11, 2004], “A-025 taper gage” of “b-000 plain gauging system”, Internet, <URL: http://www.daiichisokuhan.co.jp/A_025_26.pdf> Masaru Tsukizoe “Precision Measurements” Yokendo, 6th edition issued on November 20, 1974, p. 162-163

  The present invention provides a taper gauge capable of easily inspecting substantially the entire circumference of the outer peripheral tapered surface even if the collet is provided with a ridge at the small diameter end portion of the collet whose outer periphery is a tapered surface. For the purpose.

The present invention is a measuring method for measuring the outer peripheral tapered surface of a collet having a tapered surface on the outer periphery and a ridge formed at the end of the small-diameter portion with a taper gauge, A reference taper surface protruding inward from the inner surface of the heel passage corresponding to a larger diameter ridge passage inner surface and a plurality of radial notches formed in the circumferential direction so as to reach the peripheral surface of the tapered small diameter portion of the heel The taper gauge is fitted into the collet with the inner surface of the heel passage and the ridge, and the reference taper surface and the notch corresponding to each other, and the outer peripheral taper coated with a thin and uniform inspection agent per surface. The taper gauge is rotated while the surface and the reference taper surface are in contact with each other, the taper gauge is removed from the collet, and the outer peripheral taper is removed by scraping the inspection agent per surface. There is a measuring method of the collet to measure whether it is formed as expected.

In the present invention, the center hole of the taper link gauge has a flange passing inner surface having a diameter larger than the flange diameter of the small diameter end portion of the collet, and a radial cutout portion formed in a plurality in the circumferential direction on the flange of the small diameter end portion of the collet. having a correspondingly reference tapered surface which projects from the flange pass the inner surface inwardly, the small diameter end portion, a collet flange is formed having a larger outer diameter than the outer diameter of the small diameter portion end diameter of the tapered inner diameter Even if the part is a taper gauge with a diameter smaller than the saddle diameter, the taper gauge can be easily and quickly measured with the taper gauge by covering the outer circumference of the collet without being disturbed by the collar. it can.

  The tapering gauge of the present invention will be described. In FIG. 1, 1 is a taper gauge and 2 is a collet. As shown in FIGS. 1 to 4, the collet 2 has a tapered surface 3 on the outer periphery. A collar 5 is formed at the end 4 of the small diameter portion of the collet 2, and a plurality of (four in the present embodiment) radial directions are provided at equal intervals in the circumferential direction so as to reach the tapered small diameter section peripheral surface 6. The notch 7 is formed in an arc shape. Further, the collet 2 is formed with a plurality of slits 9 alternately formed in the circumferential direction by leaving the end portions extending in the axial direction at the small diameter end 4 and the large diameter end 8 (see FIGS. 3 and 4). ), The diameter can be elastically reduced. Of course, a single slit extending in the axial direction from the small diameter end 4 to the large diameter end 9 may be provided. The collet 2 has a small-diameter end 4 formed with a fitting groove 11 for fitting a later-described receiving ring 10 adjacent to the collar 5 in the collet large-diameter direction in the axial direction of the collar 5. Further, the collet 2 is formed with a collet center hole 13 through which a shaft member 12 to be described later passes.

  The taper gauge 1 measures the outer peripheral tapered surface 3 of the collet 2. As shown in FIG. 5, a plurality of center holes 14 of the taper gauge 1 are provided at equal intervals in the circumferential direction corresponding to the inner surface 15 of the collar passing larger than the diameter of the collet 2 and the cutout portion 7 of the collet 2. In this embodiment, the reference taper surface 16 protrudes inward from the four heel passage inner surfaces 15. When measuring the outer peripheral tapered surface 3 of the collet 2 with the tapered gauge 1, the tapered gauge 1 is fitted to the collet 2 by corresponding the flange inner surface 15 and the flange 5 and the reference tapered surface 16 and the notch 7 respectively. Therefore, as described in Non-Patent Documents 1 and 2, the taper is formed in a state where the outer peripheral taper surface 3 and the reference taper surface 16 which are thinly and evenly coated with blue paste (or Mitsume Tan) are in contact with each other. After the ring gauge 1 is rotated, the tapered ring gauge 1 is extracted from the collet 2, and it can be measured whether or not the outer peripheral tapered surface 3 is formed as expected by scraping the blue paste.

  Next, the collet 2 measured as described above is applied to the locking device 18 of the fluid pressure cylinder 17 which is a shaft grasping device. As shown in FIG. 6, a locking device 18 is attached to the tip of the fluid pressure cylinder 17. In the fluid pressure cylinder 17, a piston 21 is slidably fitted in a cylinder hole 20 of a cylinder tube 19, and the tip of a piston rod 12 integral with the piston 21 projects through the tip of the cylinder tube 19. ing. The piston 21 is configured to retract and advance the piston rod 12 by supplying pressurized fluid to one of the pressurized fluid supply / discharge ports 23 and 24.

  A cap 22 is screwed to the left end of the body 25 of the locking device 18, and a receiving portion 27 protruding to the inside of the body is formed on the cap 22. The receiving portion 27 and the rod cover 29 of the body 25 are connected to the piston rod 12. Penetrates and the piston rod 12 protrudes from the rod cover 29. Further, the collet 2 is provided between the rod cover 29 and the receiving portion 27 inside the body 25, and the piston rod 12 as a shaft member passes through the collet center hole 13.

  A drive member (single-acting piston) 31 that surrounds the radially outer side of the outer peripheral tapered surface 3 of the collet 2 is disposed on the body inner surface 30 so as to be slidable in the axial direction. The drive member 31 is formed with an inner peripheral tapered surface 32 that opposes the outer peripheral tapered surface 3 of the collet 2. A plurality of spheres (steel balls) 33 are interposed between the outer peripheral tapered surface 3 and the inner peripheral tapered surface 32 in a laminated state in contact with each other in the circumferential direction and the axial direction. The spherical body 33 is prevented from coming off in the small diameter direction of the collet in the axial direction by a receiving ring (spiro locks: trade name) 10 that is fitted in the fitting groove 11 of the collet 2 and is in contact with the flange 5. A cylinder chamber 34 is formed between the drive member 31 and the rod cover 29, and a spring chamber 36 in which a reduced diameter release spring 35 is interposed between the drive member 31 and the receiving portion 27. Yes.

  In this locking device 18, when the pressurized fluid is discharged from the cylinder chamber 34, the drive member 31 is moved in the axial direction by the diameter reduction spring 35, and the collet 2 is expanded in diameter by the elastic restoring force of the collet 2 itself. The lock of the piston rod 22 is released. When the pressurized fluid is supplied to the cylinder chamber 34, the driving member 31 moves in the axial direction in the collet large diameter direction against the diameter reducing spring 35, and the inner peripheral tapered surface 32 of the driving member 31 moves the sphere 33. The outer peripheral tapered surface 3 of the collet 2 is pressed to reduce the diameter of the collet 2, and the piston rod 12 is locked. In this locked state, since the collet 2 has a reduced diameter, even if tightening of the receiving ring 10 with respect to the collet 2 is weakened, the collet 2 is supported by the collar 5 of the collet 2. There is no risk of slipping out between the outer peripheral tapered surface 3 and the inner peripheral tapered surface 32.

FIG. 3 is a cross-sectional view taken along the line IOI of FIG. It is the front view which inserted the tapering gauge in the collet. It is a front view of a collet. It is a side view of a collet. It is a front view of a tapering gauge. It is a longitudinal cross-sectional view of the locking device of a fluid pressure cylinder.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tapering ring gauge 2 Collet 3 Outer periphery taper surface 4 Small diameter end 5 鍔 6 Taper small diameter portion peripheral surface 7 Notch 10 Receiving ring 12 Shaft member 13 Collet center hole 14 Taper ring gauge center hole 15 鍔 Passing inner surface 16 Reference taper surface 18 Axis grasping device 31 Drive member 32 Inner circumferential taper surface 33 Sphere

Claims (1)

A measuring method for measuring the outer peripheral tapered surface of the collet having a tapered outer periphery and a ridge formed at the end of the small diameter portion with a taper gauge,
The center hole of the gauge corresponds to the inner surface of the heel passage having a diameter larger than the diameter of the heel, and the inner surface of the heel passage corresponding to a plurality of radial notches formed in the circumferential direction so as to reach the peripheral surface of the tapered small diameter portion. A reference taper surface protruding inward from the
The outer peripheral taper surface on which the taper gauge is fitted into the collet with the reference taper surface and the notch corresponding to each other, and the inspection taper is applied thinly and uniformly. Rotating the taper gauge with the reference taper surface in contact with the taper gauge,
A method for measuring a collet, in which the taper gauge is pulled out of the collet and whether the outer peripheral tapered surface is formed as expected in a state where the inspection agent per surface is scraped off.

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