JP2010125478A - Method for manufacturing shaft with outer-periphery worked - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of producing no burrs at both ends of a worked part so as not to require a work of removing burrs. <P>SOLUTION: A plurality of demarcated shaft parts 3, 4, 5 are formed on a shaft 1 by juxtaposing a plurality of outer-periphery grooves 2 in the axial direction. Worked parts 7 are formed, by roll-forming, on the outer-peripheries of the demarcated shaft parts 3, 4, 5 that are the outer-periphery of a shaft 6 having each of demarcated shaft parts 3, 4, 5, but excludes each of outer-periphery grooves 2. A shaft 8 having worked parts 7 is cut off at each of outer-periphery grooves 2, so that the shaft 8 is divided for every demarcated shaft parts 3, 4, 5 that have worked parts 7. Through-holes are formed through the divided demarcated shaft parts 3, 4 in the axial direction. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a method of manufacturing an outer peripheral machining shaft having, for example, an outer gear or a male screw on the outer periphery by rolling.

  In the conventional manufacturing method of the outer peripheral machining shaft shown in FIG. 5 (a), the machining portion 7 (for example, various external gears or various male screws) is rolled on the outer circumference of the shaft 13 as an individually cut material, and this processed portion. The through holes 10 are machined in the axial direction with respect to the individual shafts 14 having 7, and the individual shafts 15 having the through holes 10 are formed. However, since the processing part 7 is rolled for each individual shaft 13 and the through hole 10 is processed for each individual shaft 14, supply and discharge must be performed for each individual shaft 13, 14. There was a problem of inefficiency.

  Therefore, in order to improve the manufacturing efficiency, in the conventional manufacturing method of the outer peripheral machining shaft shown in FIG. 5B, the machining portion 7 (for example, various external gears or various male screws) is formed on the outer periphery of the long shaft 1 as a material. ), The through-holes 10 are machined in the axial direction with respect to the individual shafts 9 obtained by cutting the long shafts 8 having the processed portions 7 to form individual shafts 11 having the through-holes 10.

  However, in the conventional manufacturing method of the outer peripheral machining shaft shown in FIG. 5B, since the machining portion 7 (for example, various external gears or various male screws) is cut, burrs are likely to occur at both cut ends of the machining portion 7. Therefore, there is a problem that the manufacturing efficiency is deteriorated by the operation of removing the burrs.

  An object of the present invention is to improve the manufacturing efficiency by eliminating the work of removing burrs at both ends of a processed part (for example, various external gears or various external threads) in the manufacturing method of the outer peripheral machining shaft.

The present invention will be described with reference to the drawings of the embodiments (the first embodiment shown in FIGS. 1A and 2 and 3 and the second embodiment shown in FIGS. 1B and 4).
In the manufacturing method of the outer peripheral machining shaft 8 according to the invention of claim 1 (corresponding to the first and second embodiments), a plurality of outer peripheral grooves 2 are arranged in parallel in the axial direction between both end portions 1a, 1b of the shaft 1. A plurality of partition shaft portions 4, 3, and 5 are formed between the outer peripheral grooves 2 and between the outer peripheral groove 2 and the shaft end portions 1a and 1b, and on the outer periphery of the shaft 6 having the respective partition shaft portions 4, 3, and 5. A processed portion 7 is formed by rolling on the outer periphery of the partition shaft portions 4, 3, 5 excluding the outer peripheral grooves 2.

  In the manufacturing method of the outer peripheral machining shaft 9 according to the invention of claim 2 (corresponding to the first embodiment), the shaft 8 having the processed part 7 rolled by the invention of claim 1 is cut at each outer circumferential groove 2. Then, the divided shaft parts 4, 3, 5 to which the processed part 7 is applied are divided.

  In the manufacturing method of the outer peripheral machining shaft 11 according to the invention of claim 3 (corresponding to the first embodiment), the through hole 10 is formed in the axial direction with respect to the partition shaft portions 4 and 3 divided by the invention of claim 2. .

In the invention of claim 4 based on the invention of claim 1 or claim 2 or claim 3, the processed portion 7 is an external gear or a male screw.
In the invention of claim 5 based on the invention of claim 4, the diameter D2 of the bottom portion 2a of the outer peripheral groove 2 is set smaller than the valley diameter D7 of the processed portion 7 which is an external gear or a male screw.

Next, technical ideas other than the claims will be described with reference to the reference numerals in the drawings of the embodiments.
In the manufacturing method of the outer periphery machining shaft 12 according to the sixth invention (corresponding to the second embodiment), the through hole 10 is formed in the axial direction with respect to the shaft 8 having the machining portion 7 rolled according to the invention of claim 1. Form.

  In the manufacturing method of the outer peripheral machining shaft 11 according to the seventh invention (corresponding to the second embodiment), the shaft 12 having the through hole 10 is cut at each outer circumferential groove 2 according to the sixth invention, and the machining portion 7 is formed. Divide into each of the applied partition shafts 4, 3, and 5.

  In the first to fifth aspects of the invention, for example, when the processed portion 7 is various external gears or various external threads as in the fourth aspect of the invention, the root diameter D7 of the processed portion 7 as in the fifth aspect of the invention. In addition, when the diameter D2 of the bottom portion 2a of the outer peripheral groove 2 is set small and the outer peripheral processing shafts 8, 9, 11 are manufactured by rolling, the processed portion 7 is not rolled in the outer peripheral groove 2, so that the outer peripheral groove 2 Even if it cut | disconnects by burr | flash, a burr | flash does not generate | occur | produce in the both ends of the process part 7, but the removal operation | work of a burr | flash is eliminated and manufacturing efficiency can be improved.

Hereinafter, the rolling method of the outer periphery processing shaft concerning 1st Embodiment of this invention is demonstrated with reference to Fig.1 (a) and FIG.2, 3. FIG.
First, a long shaft 1 is prepared as a material shown in FIGS. 1 (a) and 2 (a). In the long shaft 1, the length between both end portions 1a and 1b is L1, and the outer diameter is D1.

  Next, as shown in FIG. 1A and FIG. 2B, a plurality of outer peripheral grooves 2 are arranged in parallel in the axial direction between both ends 1a and 1b of the long shaft 1 by an automatic lathe. A plurality of partition shafts 4, 3, and 5 are formed between the outer peripheral grooves 2 and between the outer peripheral groove 2 and both end portions 1a and 1b. Since the end face sides of the partition shafts 4, 3, and 5 facing each outer peripheral groove 2 are chamfered, the opening of the space 2b in the outer peripheral groove 2 is spread outward on the side opposite to the bottom 2a of the outer peripheral groove 2. . In the long shaft 6 having the partition shafts 4, 3, and 5, the width of each outer peripheral groove 2 is W, the diameter of the bottom 2a of each outer peripheral groove 2 is D2, and the length between both ends 1a and 1b. Is L6, the blank diameter is D6 (= D1), the length of the partition shaft portion 4 between the outer peripheral grooves 2 is M4, and the length of the partition shaft portion 3 between the outer peripheral groove 2 and the end 1a is M3 ( M3 = M4), and the length of the partition shaft portion 5 between the outer peripheral groove 2 and the end portion 1b is M5 (M5> M4, M5> M3) in consideration of the chuck allowance by the automatic lathe.

  Next, as shown in FIG. 1 (a) and FIG. 2 (c), the outer periphery of the elongated shaft 6 is rolled through the outer periphery of each partition shaft portion 4, 3, 5 (step rolling). The processing part 7 (for example, various external gears or various male screws) is applied. Since the end surfaces of the partition shafts 4, 3, 5 facing each outer circumferential groove 2, that is, both end portions of the processed portion 7 are chamfered, the space 2 b in the outer circumferential groove 2 is opposite to the bottom 2 a of the outer circumferential groove 2. The opening extends outward. In the long shaft 8 having the processed portion 7, the length between the end portions 1a and 1b is L8 (> L6), the mountain diameter is D8, both outer circumferential grooves in consideration of the elongation allowance due to through rolling. The length of the partition shaft 4 between the two is N4 (N4> M4), the length of the partition shaft 3 between the outer peripheral groove 2 and the end 1a is N3 (N3> M3), the outer peripheral groove 2 and the end. The length of the partition shaft 5 between 1b is N5 (N5> M5). In addition, the diameter D2 (D2 <D7) of the bottom 2a of the outer peripheral groove 2 is set smaller than the valley diameter D7 of the processed portion 7 which is an external gear or a male screw.

  Next, as shown in FIGS. 1 (a) and 3 (a), each of the long shafts 8 is moved by using an automatic lathe using a bit slightly narrower than the width W of the outer circumferential groove 2. It cut | disconnects by the outer periphery groove | channel 2, and it divides | segments for every division axial part 4,3,5 which gave the process part 7, and it is set as each axis | shaft 9. As shown in FIG. In each of these shafts 9, the length is N4, N3 (N4 = N3), the peak diameter of the processed portion 7 is D8, and the valley diameter of the processed portion 7 is D7.

  Further, as shown in FIGS. 1A and 3B, through an automatic lathe, through holes 10 are machined in the axial direction with respect to the divided individual shafts 9, and the individual shafts having the through holes 10 are processed. 11 is chamfered at both end portions of the through hole 10 at both end portions 11a and 11b. In each shaft 11 having the through hole 10, the length is N4, N3 (N4 = N3), the peak diameter of the processed portion 7 is D8, and the valley diameter of the processed portion 7 is D7.

  Next, the manufacturing method of the outer periphery processing shaft concerning 2nd Embodiment of this invention is demonstrated with reference to FIG.1 (b) and FIG. 4 centering on difference with 1st Embodiment. Incidentally, FIG. 1A and FIG. 3A in the first embodiment are changed to FIG. 1B and FIG. 4A in the second embodiment, and FIG. 1A and FIG. FIG. 3 (b) is changed to FIG. 1 (b) and FIG. 4 (b) in the second embodiment, and the others are the same as in the first embodiment. In FIG. 1B and FIG. 4A, the through hole 10 is formed in the axial direction with respect to the long shaft 8 having the processed part 7 that has been rolled through by an automatic lathe. In FIG. 1B and FIG. 4B, each of the divided shaft portions 4, 3 in which the long shaft 12 having the through hole 10 is cut at each outer peripheral groove 2 by the automatic lathe and the processed portion 7 is provided. , 5, and chamfering is performed on both end portions of the through-hole 10 at both end portions 11 a and 11 b of each shaft 11 having the through-hole 10.

This embodiment has the following effects.
* Since a plurality of processed parts 7 (for example, various external gears or various external threads) can be applied to the outer periphery of the outer peripheral processing shaft 8 by one-time rolling, manufacturing efficiency can be improved.

  * Since the diameter D2 of the bottom 2a of the outer circumferential groove 2 is set to be smaller than the root diameter D7 of the machining portion 7 which is various external gears or various male screws, when manufacturing the respective outer peripheral machining shafts 8, 9, and 11 by through rolling In addition, the processed portion 7 is not rolled in the outer circumferential groove 2. Therefore, the processed portion 7 does not exist in the outer peripheral groove 2, and even if the outer peripheral groove 2 is cut by a cutting tool, the cutting tool 7 does not cut both ends of the processed portion 7. Therefore, burrs are not generated at both ends of the processed portion 7, and the removal efficiency of burrs can be eliminated to improve manufacturing efficiency.

For example, the following embodiment may be configured as follows.
-In-feed rolling (stop rolling) can be adopted instead of through rolling (step rolling).

  -Cutting with a bit slightly narrower than the width W of the outer peripheral groove 2, but if the bit does not cut both ends of the processed portion 7, use a bit having the same width as the width W of the outer peripheral groove 2. May be.

(A) is process drawing which shows the manufacturing method of the outer periphery processing shaft concerning 1st Embodiment, (b) is process drawing which shows the manufacturing method of the outer periphery processing shaft concerning 2nd Embodiment. (A) (b) (c) is an enlarged view of FIG. 1 (a), respectively. (A) (b) is an enlarged view of FIG. 1 (a), respectively. (A) and (b) are the enlarged views of FIG.1 (b), respectively. (A) is process drawing which shows the manufacturing method of the conventional outer periphery processing shaft, (b) is process drawing which shows the manufacturing method of the conventional outer periphery processing shaft.

Explanation of symbols

  1, 6, 8, 9, 11 ... shaft, 1a, 1b ... end of shaft, 2 ... outer peripheral groove, 2a ... bottom of outer peripheral groove, 2b ... space in outer peripheral groove, 3, 4, 5 ... partition shaft , 7 ... processed part, 10 ... through hole, D7 ... trough diameter of the processed part, D2 ... diameter of the bottom part of the outer peripheral groove.

Claims (5)

A plurality of outer peripheral grooves are arranged in the axial direction between both end portions of the shaft to form a plurality of partition shaft portions between both outer peripheral grooves and between the outer peripheral groove and the shaft end portion. A manufacturing method of an outer periphery processing shaft, characterized in that a processing portion is formed by rolling on the outer periphery of a partition shaft portion excluding each outer peripheral groove on the outer periphery. A plurality of outer peripheral grooves are arranged in the axial direction between both end portions of the shaft to form a plurality of partition shaft portions between both outer peripheral grooves and between the outer peripheral groove and the shaft end portion. The outer periphery of the partition shaft portion excluding each outer peripheral groove at the outer periphery is processed by rolling, and the shaft having this processed portion is cut at each outer peripheral groove, and divided into each divided shaft portion provided with the processed portion. The manufacturing method of the outer periphery processing axis | shaft characterized by these. A plurality of outer peripheral grooves are arranged in the axial direction between both end portions of the shaft to form a plurality of partition shaft portions between both outer peripheral grooves and between the outer peripheral groove and the shaft end portion. The outer periphery of the partition shaft portion excluding each outer peripheral groove at the outer periphery is subjected to a processed portion by rolling, the shaft having this processed portion is cut at each outer peripheral groove, and is divided for each partition shaft portion subjected to the processed portion, A method of manufacturing an outer peripheral machining shaft, wherein a through-hole is formed in an axial direction with respect to the divided partition shaft portion. The method of manufacturing an outer peripheral machining shaft according to claim 1, wherein the machining portion is an external gear or a male screw. The method for manufacturing an outer peripheral machining shaft according to claim 4, wherein the diameter of the bottom of the outer circumferential groove is set smaller than the root diameter of the machining portion which is an external gear or a male screw.

Images