JPH0596322A - Capstan for wire drawing machine - Google Patents

Abstract

PURPOSE:To easily work a circular shaft hole having a key groove and to manufacture a capstan for a wire drawing machine at low cost by working end parts of a circular shaft hole with high accuracy and working a relief part larger in diameter than the rotary shaft in the intermediate part of a circular shaft hole. CONSTITUTION:Since the relie worked part 110 does not require a high-accuracy working, the circular shaft hole 11 having the key groove 111 is worked easily and the capstan for the wire drawing machine can be manufactured at low cost. The rotary shaft of the wire drawing machine is fixed by the end parts (k),(n) of the circular shaft hole 11 worked with high accuracy surely to a columnar fitting 1 and no backlash is generated by the rotation and vibration of the rotary shaft. The end parts (k), (I) of the circular shaft hole 11 are short in working length, the inner part is not worked, the relief of a working edge of a slotter is small and high-accuracy working can be performed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a capstan for a wire drawing machine used in a wire drawing device for drawing a wire.

[0002]

2. Description of the Related Art As shown in FIG.
Cylindrical metal fitting 300 having a circular shaft hole 200 with 0
In addition, a capstan B for a wire drawing machine is known in which a ceramic cylindrical body 400 is assembled. Since the rotary shaft of the wire drawing machine is fitted and fixed in the circular shaft hole 200, in order to prevent rattling due to vibration and rotation, the circular shaft hole 200 is machined with high accuracy (tolerance ± 0.01 to ± 0.02) is required.

[0003]

However, the conventional capstan B for a wire drawing machine described above has a drawback in that it takes time and labor to process the entire circular shaft hole 200 with high precision, resulting in high manufacturing cost. An object of the present invention is to provide a capstan for a wire drawing machine that can be manufactured at low cost.

[0004]

[Means for Solving the Problems] In order to solve the above problems,
The present invention relates to a wire drawing machine capstan in which a ceramic cylindrical body is fitted to the outer periphery of a cylindrical metal fitting provided with a circular shaft hole with a key groove for fixing the rotary shaft of the wire drawing machine, In addition to high-accuracy machining of the end portion of, the relief processing having a diameter larger than that of the rotating shaft is applied to the middle portion of the circular shaft hole.

[0005]

[Operation and effect of the invention] Since the end of the circular shaft hole is machined with high precision and the relief process having a diameter larger than that of the rotary shaft is applied to the middle part of the circular shaft hole, the rotary shaft of the wire drawing machine is a circular shaft. It is securely fixed to the cylindrical fitting at the end of the hole, and does not rattle even when the rotating shaft is rotated or vibrated. Since only the end of the circular shaft hole needs to be processed with high precision, the processing of the circular shaft hole with the key groove is simple and the capstan for wire drawing machine can be manufactured at low cost.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. The wire drawing machine capstan A is formed by fitting a ceramic cylindrical body 2 to the outer periphery of a cylindrical metal fitting 1 having a circular shaft hole 11 with a key groove 111.

Cylindrical metal fitting 1 (made by S45C in this embodiment)
Has a drum length of 430 mm and a drum outer diameter of 125 mm, and external threads 14 and 15 for screwing nuts 12 and 13 are formed on the outer periphery of the ends. Round shaft hole 11
Is a hole with a length of 190 mm whose center coincides with the axis of the cylindrical metal fitting 1, and the ends k and n from the end of each hole to the depth of 45 mm are machined with high accuracy of diameter 55 mm ± 0.01 mm. The clearance of 110 mm for a diameter of 65 mm is used for 100 mm in the middle part m.
Has been applied. The size of the key groove 111 is 12
Mm, depth 3.3 mm (central part). 112, 11
3 and 114 and 115 are concave portions having a circular cross section for fitting a base portion (neither shown) of the rotary shaft of the wire drawing machine,
20 mm long, 100 mm diameter, 100 length
It has a diameter of 102 mm and a diameter of 102 mm.

The ceramic cylindrical body 2 (alumina ceramic in this embodiment) has an outer diameter of 150 mm and a length of 417 mm, and is held by nuts 12 and 13 with an adhesive interposed. .. During the wire drawing work, wire drawing is wound around the outer circumference of the ceramic cylindrical body 2.

Next, a method of manufacturing the capstan A for wire drawing machine will be briefly described. (1) After forming the recesses 112, 113, 114, 115 and the male screws 14, 15, the intermediate portion m is hollowed out by a general-purpose lathe. (2) Using the cutting machine, the circular shaft holes 11 and the keyways 111 at the ends k and n are machined with high precision. (3) The nut 12 with the adhesive interposed is screwed onto the male screw 14. (4) The ceramic cylindrical body 2 is fitted into the cylindrical metal fitting 1. (5) A nut 13 having an adhesive interposed therein is screwed onto a male screw 15 to fit the ceramic cylindrical body 2 to the outer periphery of the cylindrical metal fitting 1.

The advantages of the capstan A for wire drawing machine will be described below. (A) Since it is not necessary to perform high-precision machining on the relief processing portion 110 having a length of 100 mm, the circular shaft hole 11 with the key groove 111 can be easily processed, and the cap for the wire drawing machine can be manufactured at low cost. Can manufacture stuns. In addition, when 100 capstan A for wire drawing machine and 100 pieces of all processed products without relief processing 110 were manufactured, the processing cost and processing time of capstan A for wire drawing machine were about 1/2 of all processed products. The yield is 30
Improved by more than%. (A) The rotary shaft of the wire drawing machine is securely fixed to the columnar metal fitting 1 by virtue of the ends k and n of the circular shaft hole 11 that has been subjected to high-precision machining, so that it does not rattle even if the rotary shaft is rotated or vibrated. Doesn't cause ties. The lengths of the ends k and n that require high-precision processing are various, and as a result of trial production, each is 1/5 of the total (k + n + m).
It turns out that the above is good. (C) The processing length of the ends k and n of the circular shaft hole 11 is short,
Further, since it is not machined all the way to the inside, there is little escape of the machining blade of the vertical cutting machine, and high precision machining with a tolerance of ± 0.01 or less can be easily performed.

The present invention includes the following embodiments in addition to the above embodiments. a. The ceramic material of the ceramic cylindrical body may be silicon nitride, zirconia, or the like, in addition to alumina. b. The length of the relief processing performed on the middle portion of the circular shaft hole may be appropriately determined within the range of 3/5 or less of the circular shaft hole.

[Brief description of drawings]

FIG. 1 is a structural explanatory view of a wire drawing machine capstan according to a first embodiment of the present invention.

FIG. 2 is a structural explanatory view of a conventional capstan for a wire drawing machine.

[Explanation of symbols]

 A Capstan for wire drawing machine m Middle part k, n End part 1 Cylindrical metal fitting 2 Ceramic cylindrical body 11 Circular shaft hole 110 Relief processing 111 Keyway

Claims (1)

[Claims] 1. A wire drawing machine capstan in which a ceramic cylindrical body is fitted around the outer circumference of a cylindrical metal member having a circular shaft hole with a key groove for fixing the rotary shaft of the wire drawing machine. A capstan for a wire drawing machine, characterized in that an end portion of the hole is machined with high precision, and a relief processing having a diameter larger than that of the rotary shaft is applied to an intermediate portion of the circular shaft hole.