CN203292615U

CN203292615U - Gear hobbing tool for machining duplicate gear

Info

Publication number: CN203292615U
Application number: CN2013202886770U
Authority: CN
Inventors: 包文
Original assignee: Hangzhou Advance Gearbox Group Co Ltd
Current assignee: Hangzhou Advance Gearbox Group Co Ltd
Priority date: 2013-05-24
Filing date: 2013-05-24
Publication date: 2013-11-20
Anticipated expiration: 2023-05-24

Abstract

Provided is a gear hobbing tool for machining a duplicate gear. The gear hobbing tool is composed of two parts including a tool main body and an inner hexagonal screw. The tool main body is provided with an internal gear and an external gear. The modulus, the number of teeth and pressure angles of the internal gear and the external gear are respectively equal to those of a first gear and a second gear of the duplicate gear to be machined. The width of tooth space of the internal gear of the tool main body is 0.03 to 0.05 mm larger than the thickness of a tooth of the first gear. The degree of symmetry of tooth space D of the external gear of the tool main body corresponding to a tooth C of the internal gear is not larger than 0.015 mm. A screw hole matched with the inner hexagonal screw is arranged at the position opposite to the tooth C at 180 degrees. The gear hobbing tool has following beneficial effects: the duplicate gear different in modulus and pressure angles can be machined; and precision of teeth can be enhanced by times.

Description

A kind ofly process the gear hobbing tooling that duplicate gear is used

Technical field

The utility model relates to a kind of gear hobbing tooling and processing method that duplicate gear is used of processing, belong to the gear manufacturing technology technical field.

Background technology

Need the involute duplicate gear of processing as shown in Figure 1, 2, require the teeth groove B in the second gear must aim at first teeth groove A, teeth groove B is not more than 0.03mm with respect to the symmetry of teeth groove A.The general method that adopts as shown in Figure 3,4 of prior art processing the type part, after namely the first Gear Processing being completed, on gear shapping machine, with pinion cutter, aim at teeth groove A(diagram pinion cutter position 1), in the situation that pinion cutter and part all without spin travelling table to slotting the second gear position (diagram pinion cutter position 2), slotting the second gear again, the shortcoming that this processing method mainly exists is summarized as follows:

1, the modulus of the first and second gear, pressure angle must equate, could utilize pinion cutter to process tooth;

2, the symmetry of A, B two teeth groove can only reach the precision of 0.05mm left and right, product percent of pass<50% usually;

3, gear shaper workbench need to move frequently during each renewal part, and working (machining) efficiency is low.

The utility model content

The purpose of this utility model is to overcome the deficiency that prior art exists, and provide a kind of modulus and unequal duplicate gear of pressure angle can processed, can improve two alignment precisions of aiming at teeth groove, control its symmetry in 0.03, gear hobbing tooling and processing method that the processing duplicate gear of raising working (machining) efficiency is used.

the purpose of this utility model completes by following technical solution, the gear hobbing tooling that described processing duplicate gear is used, it is comprised of frock main body and soket head cap screw two parts, described frock main body is provided with internal gear and external gear, in described frock main body, the external gear modulus, the number of teeth, pressure angle respectively with processing duplicate gear in first, dual gear equates, and the internal gear teeth groove width that makes the frock main body is than the large 0.03～0.05mm of the first gear tooth thickness, the external gear teeth groove D of frock main body is not more than this specification requirement of 0.015mm(with respect to the symmetry of internal gear teeth C and can utilizes in the processing of linear cutting equipment clamped one time, external tooth guarantees), and be provided with a screw that matches with described soket head cap screw in 180 ° of relative positions of tooth C.

A kind of utilization is the method for gear hobbing tooling processing duplicate gear as mentioned above, and this processing method comprises the steps: 1) first the first Gear Processing of duplicate gear is completed; 2) the inner gear housing of frock main body on the first gear, the tooth C of frock main body just is enclosed within the teeth groove A of the first gear; 3) soket head cap screw is tightened in the screw of frock main body to eliminate fit-up gap; 4) then utilize the teeth groove D of the cutter tooth aligning tool main body of hobboing cutter, start gear hobbing processing the second gear, until completion of processing.

The utility model uses gear hobbing tooling, not only can process modulus, the unequal duplicate gear of pressure angle, can improve exponentially the precision to tooth simultaneously, practical effect shows, can make the symmetry of two teeth groove reach 0.02～0.03mm, product percent of pass >=97%.This frock is easy to use, and the comparable prior art of actual working (machining) efficiency improves approximately 40%, and economic benefit is very remarkable.

The accompanying drawing explanation

Fig. 1 is described a kind of dual gear structure schematic diagram of the present utility model.

Fig. 2 is that A in Fig. 1 is to view.

Fig. 3 is the machining sketch chart of existing duplicate gear.

Fig. 4 is that B in Fig. 3 is to view.

Fig. 5 is processing tool schematic diagram described in the utility model.

Fig. 6 is that C in Fig. 5 is to view.

Fig. 7 is duplicate gear machining sketch chart of the present utility model.

Fig. 8 is that the D of Fig. 7 is to view.

The specific embodiment

below in conjunction with accompanying drawing, the utility model is described in detail: Fig. 5, shown in 6, the gear hobbing tooling that processing duplicate gear described in the utility model is used, it is comprised of frock main body 1 and soket head cap screw 2 two parts, described frock main body 1 is provided with internal gear 3 and external gear 4, in described frock main body 1, external gear 3, 4 moduluses, the number of teeth, pressure angle respectively with processing duplicate gear in first, dual gear equates, and internal gear 3 space widths that make frock main body 1 are than the large 0.03～0.05mm of the first gear tooth thickness, the external gear 4 teeth groove D of frock main body 1 are not more than this specification requirement of 0.015mm(with respect to the symmetry of internal gear teeth C and can utilize in the processing of linear cutting equipment clamped one time, external tooth guarantees), and be provided with a screw 5 that matches with described soket head cap screw in 180 ° of relative positions of tooth C.

Shown in Fig. 7,8, a kind of utilization described in the utility model is the method for gear hobbing tooling processing duplicate gear as mentioned above, and this processing method comprises the steps: 1) first the first Gear Processing of duplicate gear is completed; 2) the inner gear housing of frock main body on the first gear, the tooth C of frock main body just is enclosed within the teeth groove A of the first gear; 3) soket head cap screw is tightened in the screw of frock main body to eliminate fit-up gap; 4) then utilize the teeth groove D of the cutter tooth aligning tool main body of hobboing cutter, start gear hobbing processing the second gear, until completion of processing.

Embodiment:

Process certain model duplicate gear, the first gear parameter is: modulus M _N1=3, tooth number Z ₁=17, pressure angle α _N1=24 °, helixangleβ ₁=0 °, across 3 tooth base tangent length W ₃The=22.70～22.74, second gear parameter is: modulus M _N2=2, tooth number Z ₂=50, pressure angle α _N2=20 °, helixangleβ ₂=0 °, across 6 tooth base tangent length W ₆=33.82～33.87.Internal gear modulus, the number of teeth, pressure angle, the helical angle of gear hobbing tooling of design manufactures identical with the first gear, internal gear across rod apart from M _{(Φ 5.5)}=41.33～41.41(calculates according to the common normal size of the first gear and fit-up gap), external gear parameter and second gear of frock are identical.After pressing preceding method mounting tool processing, the metering result shows that the symmetry of part two teeth can reach in 0.02mm.

Claims

1. process the gear hobbing tooling that duplicate gear is used for one kind, it is comprised of frock main body and soket head cap screw two parts, it is characterized in that: described frock main body is provided with internal gear and external gear, in described frock main body, the external gear modulus, the number of teeth, pressure angle equates with the first gear and the second gear in the duplicate gear of processing respectively, and the internal gear teeth groove width that makes the frock main body is than the large 0.03～0.05mm of the first gear tooth thickness, the external gear teeth groove D of frock main body is not more than 0.015mm with respect to the symmetry of internal gear teeth C, and be provided with a screw that matches with described soket head cap screw in 180 ° of relative positions of tooth C.