JP2009172736A - Gear end face chamfering tool having phrasing tool - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gear end face chamfering tool capable of wholly eliminating burrs and excessive thickness parts in a gear tooth face generated by roll-forming (plastic working) after phrasing, when heat treatment is performed for a gear to be cut without shaving the gear after phrasing the gear, and a tooth shape (tooth flank) grinding process or a tooth honing process is performed after the heat treatment is performed, that is, the tooth face is cut. <P>SOLUTION: This gear end face chamfering tool is a phrasing tool 1 for machining chamfers 4a and 4b of end faces of an acute angle side piece tooth face of the gear 4 being a material to be cut or both tooth faces on an acute angle side and an obtuse angle side. A gear-shaped tool 2 being a gear-shaped burnish gear for eliminating and machining burrs and excessive thickness parts 5a on the tooth face sides after machining by the phrasing tool 1 is assembled integrally with the phrasing tool or manufactured as an integrated object. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a gear end face chamfering tool having a phrasing tool for processing a chamfer of an end face of a work gear.

The machined gear is chamfered 4a, 4b on the end face parts 4c, 4d of the gear 4 as shown in Fig. 2 (a) to prevent scratches in the manufacturing process and to prevent workers from cutting their hands. Enforce. The chamfering 4a, 4b of the end face portions 4c, 4d may be only one tooth face on the acute angle side of the gear, or may be chamfered on both end faces of both the acute angle side and the obtuse angle side. The chamfering of the end surface portion is processed with a gear end surface chamfering tool called a phrasing tool. Since the phrasing tool is rolled (plastic processing), bulges (burrs and surplus parts) are generated at the gear end faces 4c and 4d and the gear tooth faces. The burrs / remaining portions 5b of the gear end faces 4c and 4d are removed by a cutting tool or cutter attached to a chamfering processing facility. Conventionally, the burr and surplus part 5a of the gear tooth surface part is shaving, which is the next step, to finish the tooth surface of the gear, so the burr and surplus part 5a of the gear tooth surface part is simultaneously removed and processed, After heat treatment, it was a product as it was. Patent documents 1 and 2 disclose a gear end face chamfering tool called a conventional phrasing tool.
Japanese Patent No. 3749447 JP 2007-069313 A

  However, in recent manufacturing gears, high manufacturing accuracy of gears is required in the manufacturing process, and it is necessary to remove heat treatment distortion due to heat treatment after shaving. Therefore, after the phrasing process, the heat treatment is performed as it is without the shaving process, and after the heat treatment, that is, after the tooth surface is hardened, there is a process of grinding the tooth profile (tooth surface) or a process of honing the tooth surface. For this reason, the bulging part (burr / remaining part) of the gear tooth surface part generated by the rolling process (plastic processing) after the phrasing process will be heat-treated while remaining, and the tooth profile of the work gear (tooth surface) ) In the grinding process, the tooth phase cannot be detected accurately due to the effects of burrs and excess on the tooth surface when gear teeth are phase aligned. There was a problem that the machining allowance of the surface greatly changed and the required accuracy of the work gear could not be satisfied. Similarly, in the process of honing the tooth surface after heat treatment, that is, after hardening the tooth surface, the tooth phase cannot be accurately detected due to burrs and surplus on the tooth surface portion. However, there is a problem that the required accuracy of the work gear cannot be satisfied. In addition, some tooth surface honing processing equipment has a function to perform tooth surface honing after measuring the gear accuracy before processing, but if there are burrs / remaining on the tooth surface side, gear accuracy measurement is possible. Therefore, there is a problem that it is determined that the gear accuracy before processing is poor.

  The object of the present invention is a process for solving such a conventional problem, after a phrasing process of a work gear, without being subjected to a shaving process, as it is a heat treatment process, and after the heat treatment process, that is, after the tooth surface is hardened, a tooth shape (tooth surface) grinding process, A gear end chamfering tool having a phrasing tool that can be removed without leaving burrs and surplus gear teeth generated by rolling (plastic processing) after phrasing even in the case of performing tooth surface honing. It is to provide.

  Therefore, the present invention provides a gear end face chamfering tool having a framing tool for chamfering a chamfer of an acute angle side tooth surface or both end surfaces of an acute angle side and an obtuse angle side of a gear as a work piece. A gear having a phrasing tool, wherein a gear-shaped tool, which is a gear-shaped vanish gear for removing burrs and surplus on the rear tooth surface side, is integrally assembled with the phrasing tool or manufactured as a single piece. The above-described problems of the present invention have been solved by the end face chamfering tool.

  In the gear end face chamfering processing tool having the phrasing tool of the present invention, a gear-shaped tool that is a gear-like vanish gear for removing burrs and surplus on the tooth surface side after processing with the phrasing tool is integrated with the phrasing tool. Since the gear-shaped tool, which is a vanish gear, removes burrs and surplus on the tooth surface side after machining with the phrasing tool during one rotation of the gear end chamfering tool. After phrasing of the cutting gear, it is heat-treated without shaving, and phrasing even after the heat treatment, that is, after tooth surface hardening, tooth profile (tooth surface) grinding or tooth surface honing. Has a phrasing tool that can be removed without leaving burrs and surplus on the gear tooth surface generated by subsequent rolling (plastic processing) That was intended to provide a gear edge chamfering tool.

Preferably, the phrasing tool portion for chamfering the gear end face and the gear-shaped varnish gear portion for removing burrs and surplus on the tooth surface side after processing with the phrasing tool are divided on the circumference of the tool body. The circumferential phrasing tool portion may be divided into half and the vanish gear portion may be divided into half and half or at a ratio other than that.
Furthermore, it is desirable that the cross-section of the gear-shaped tool of the burnish gear portion that processes the tooth trace surface after processing with the phrasing tool is a concave surface.

  An embodiment of the present invention will be described with reference to FIGS. Fig.1 (a) is a schematic side view which shows the gear end surface chamfering tool which has a framing tool which processes the chamfering of the end surface of the to-be-cut gear of embodiment of this invention, (b) is the AA line of (a). 2A is a perspective view showing a tooth surface of one tooth after being processed by the phrasing tool portion 1 of FIG. 1A, and FIG. 2B is a tooth along line 3A of FIG. 4a and 4b are gear end face chamfered parts after phrasing processing, and FIG. 3 shows a state of occurrence of tooth surface burrs (remaining thickness) 5 of one tooth 4 processed by the phrasing tool part 1. 4A is a plan view showing a state in which the gear-shaped tools 3 and 3 of the burnish gear portion 2 burnish the tooth surfaces of one tooth after being processed by the phrasing tool portion 1 of FIG. Is a perspective view showing the tooth surface of one tooth processed by (a), (c) is a tooth trace along line 5A of (b) FIG. 5A is a cross-sectional view of the gear-shaped tools 3 and 3 of the burnish gear portion 2 for machining the surface, and FIG. ) Shows the tooth trace measurement result of the tooth surface of one tooth after the workpiece gear is actually machined by the burnish gear portion 2 of the gear end chamfering tool having the phrasing tool of the embodiment of the present invention shown in FIG.

  In the gear end face chamfering tool having the phrasing tool according to the embodiment of the present invention, as shown in FIG. 1, the end face 4c of the tooth 4 on the acute angle side or both the acute angle side and the obtuse angle side of the gear 4 as the work piece. , 4d chamfering part 4a, 4b, the gear end face chamfering tool, the gear shape of the gear-like vanish gear part 2 that removes burrs and surplus 5 on the tooth surface side after machining with the phrasing tool It is a gear end face chamfering processing tool having a phrasing tool characterized in that the tools 3 and 3 are integrally assembled to the phrasing tool 1 or manufactured as an integral part. As shown in FIG. 1, a phrasing tool part 1 for chamfering a gear end face, and a gear-shaped tool 3 and 3 for a burnish gear part 2 for removing burrs and surplus 5b on the tooth surface side after the phrasing tool 1 is processed. Were divided and arranged on the circumference of the tool body 6. As shown in FIG. 1 (a), the circumferential phrasing tool part 1 may be arranged in half at the lower half and the vanish gear part 2 in half, but it may be divided and arranged at a ratio other than that. May be.

  FIG. 5 (a) shows the result of measuring the tooth traces of the tooth surface of one tooth after processing using only the conventional phrasing tool part. In tooth trace measurement, bulges (burrs / remains) 5a are seen on the tooth surfaces near the end surfaces on both sides, but the gear end face chamfering tool having the phrasing tool of the embodiment of the present invention shown in FIG. As shown in the tooth trace measurement result of the tooth surface of one tooth after the machined gear is actually machined in the burnish gear part 2, there is no bulge (burrs / remains) on the tooth surface near the end surfaces on both sides, The effect was verified.

  As shown in FIG. 3, the burr and surplus 5 of the one tooth 4 after being processed by the phrasing tool portion 1 is a tooth burr and surplus 5 a generated on the tooth surface and an end surface generated on the end surface 4 c 4 d of the one tooth 4. Bali and surplus 5b. Preferably, as shown in FIG. 4 (c), the cross-sections of the gear-shaped tools 3, 3 of the vanish gear portion 2 for machining the tooth trace surface along the line 5A of FIG. 4 (b) are concave surfaces. It is desirable. That is, as shown in FIG. 2 (b), the tooth surface is convexly crowned to prevent noise generated during normal tooth meshing, so that the tooth trace surface of the vanish gear portion 1 is convex or flat. This is because there is a risk of missing the tooth burrs / remaining meat 5a.

  In a gear end chamfering tool having a phrasing tool according to an embodiment of the present invention, a gear-shaped tool that is a gear-like vanish gear that removes burrs (remaining surplus) on the tooth surface after being processed by the phrasing tool is used. Since the gear-shaped tool, which is a vanish gear, removes burrs and surplus on the tooth surface side after processing with the phrasing tool during one rotation of the gear end face chamfering tool. After the phrasing of the workpiece gear, it is heat-treated without being shaved, and after the heat treatment, that is, after the tooth surface is hardened, the tooth profile (tooth surface) grinding process or the tooth surface honing process is performed. A phrasing tool that can be removed without leaving burrs and surplus of the gear tooth surface generated by rolling (plastic processing) after processing It was intended to provide a gear edge chamfering tool having a.

(A) is a schematic side view which shows the gear end surface chamfering processing tool which has a framing tool which processes the chamfering of the end surface of the to-be-cut gear of embodiment of this invention, (b) followed the AA line of (a). FIG. (A) is a perspective view which shows the tooth surface of one tooth after processing with the phrasing tool part 1 of FIG. 1 (a), (b) is sectional drawing of the tooth trace surface along the 3A line of (a), 3a Reference numeral 3b denotes a gear end face chamfered portion after processing. The top view which shows the generation | occurrence | production state of the tooth | gear surface burr | flash (remaining thickness) 5 of the one tooth 4 processed by the phrasing tool part 1. FIG. (A) is a plan view showing a state in which the gear-shaped tools 3 and 3 of the burnish gear section 2 burnish the tooth surface of one tooth after machining by the phrasing tool section 1 in FIG. 2, and (b) by (a) The perspective view which shows the tooth surface of the processed 1 tooth | gear, (c) is sectional drawing of the gear-shaped tools 3 and 3 of the burnish gear part 2 which processes the tooth trace surface along 5A line of (b). (A) shows the tooth trace measurement result of the tooth surface of one tooth after machining with only the conventional phrasing tool part, (b) is a gear end face chamfering tool having the phrasing tool of the embodiment of the present invention shown in FIG. The tooth trace measurement result of the tooth surface of one tooth after being actually machined by the vanish gear portion 2 is shown.

Explanation of symbols

1: phrasing tool part, 2: vanish gear part, 3, 3: gear-shaped tool of vanish gear part 2, 4: teeth, 4a, 4b: chamfered part, 4c, 4d: gear end face 5: burr / remaining part, 5a : Burrs and surplus on the tooth surface side, 5b: Burrs and surplus on the end surface side

Claims (3)

  In a gear end face chamfering tool having a framing tool for processing the chamfering of the sharp end face of the gear, which is a work piece, or both the acute face and the obtuse face, the tooth face side after machining with the phrasing tool. A gear end face chamfering tool having a phrasing tool, wherein a gear-shaped tool, which is a gear-like burnish gear for removing burrs and surplus, is integrally assembled with a phrasing tool or manufactured as an integral part.   The phrasing tool part for chamfering the gear end face and the gear-like varnish gear part for removing burrs and surplus on the tooth surface side after processing with the phrasing tool are arranged on the circumference of the tool body. 2. A gear end face chamfering process having a phrasing tool according to claim 1, wherein the circumferential phrasing tool part is divided into half and the vanish gear part are divided into half, half by half, or other ratio. tool.   The gear end face chamfering process having a phrasing tool according to claim 1 or 2, wherein a cross section of the gear-shaped tool of the vanish gear portion for processing the tooth trace surface after processing by the phrasing tool is a concave surface. tool.

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