CN2038825U

CN2038825U - Worm-type gear-shaving cutter with laminated structure

Info

Publication number: CN2038825U
Application number: CN 88210676
Authority: CN
Inventors: 刘茂宦; 经以广
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-06-21
Filing date: 1988-06-21
Publication date: 1989-06-07

Abstract

The utility model relates to a worm-type shaving cutter with a laminated structure. At present, a gear type shaving cutter is used for freely shaving, and the middle concave phenomenon of the gear form can occur. A shaping method is used for solving the middle concave problem in the shaving process; however, as the parameters of work pieces change, the shaping operation of the shaving cutter becomes complicated. The worm-type shaving cutter with a laminated structure of the utility model uses a plurality of cutter teeth for forming a worm gear form, the overlap ratio of the cutter and the work pieces can be increased, the original relief groove can be canceled, the fluctuation of the shaving cutter can be reduced, and thereby, the middle concave problem of the gear form can be solved. The utility model has the advantages of easy fabrication and long service life for the cutter, and the cutter teeth can be conveniently replaced and reground.

Description

Worm-type gear-shaving cutter with laminated structure

The utility model relates to the cutter that is used for the gear teeth processing equipment, particularly a kind of stacked worm gear shaver.

Since the forties, industries such as various lathes, automobile, tractor the fine finishining of a large amount of 7 class precision gears that use, adopt traditional processing method both at home and abroad always---carry out free shaving with the gear type gear shaver, this processing method, because the registration of workpiece and cutter engagement is little, the escape of gear shaver has reduced the rigidity of cutter, and the change of shaving cutting force etc., (the concave amount reaches 0.01～0.03mm) to cause shaving backgear profile of tooth generation concave.In order to solve the concave problem in the shaving technology, have to cutter is repaiied type, but because the variation of workpiece parameter, make the flank concave amount also change, this just makes the type of repairing of cutter become very complicated, in recent years, adopt the accurate gear-grinding machine roll flute of Worm type abroad again, because this gear grinding machines cost an arm and a leg, service condition is very harsh, therefore is unsuitable for the extensive use in China.

The purpose of this utility model is at the problems referred to above, and a kind of good rigidly is provided, and can eliminate the flank concave phenomenon in the tooth Profile Machining, and price is low, long, the simple stacked worm gear shaver of manufacturing of life-span.

Stacked worm gear shaver of the present utility model comprises cutter hub and cutter tooth, uniform axial dovetail groove is arranged on the cutter hub, cutter tooth is made up of the several slices in the dovetail groove that is embedded in cutter hub, its surface is intensive interrupted worm flank, the blade of cutter tooth is promptly on described worm thread face, during cutting, the engagement of cutter and workpiece is equivalent to worm screw and gears engaged, cutter tooth compresses by being contained in the voussoir in the cutter hub dovetail groove and the nut at two ends, voussoir is fixed on the cutter hub by screw, in case owing to cutting vibration causes becoming flexible.Between cutter tooth and the cutter hub adjusting pad is arranged, after the cutter tooth wearing and tearing, can make the cutter tooth after refacing keep original external diameter by changing adjusting pad.

The shaving process that the utility model has the advantages that cutter is equivalent to replace original gear and gears engaged with worm screw and gears engaged, increased the registration of cutter and workpiece, reduced the fluctuation of cutting force, prevent flank concave, improved the precision of gear, cutter tooth adopts laminated structure, cancelled the escape of the wheeled gear shaver of full depth tooth, so increased the rigidity of cutter, make simultaneously simply, be convenient to reface and change, improved the service life of cutter.

Fig. 1 is the front view of stacked worm gear shaver of the present utility model.Among the figure: 1 cutter hub, 2 cutters tooth, 3 adjusting pads, 4 nuts.

Fig. 2 is the right view of Fig. 1, among the figure: 1 cutter hub, 2 cutters tooth, 3 adjusting pads, 4 nuts, 5 voussoirs, 6 screws.

Fig. 3 is the tooth-shape structure schematic diagram of cutter tooth 2, among the figure: α-profile angle, A-axial pitch, B-axial tooth thickness, C-height of teeth top, D-whole depth.

Embodiment:

Referring to Fig. 1～3, cylindricality cutter hub 1 material is 40Cr, have the axial dovetail groove of 36 five equilibriums on its circumference, there is pin thread at two ends, cutter hub 1 is fixed on the knife bar of lathe with endoporus and keyway, cutter tooth 2 materials are W18Cr4V, totally 36, every thickness 2mm, be embedded in respectively in 36 dovetail grooves of cutter hub 1, its two ends are taper seat, and two circular cone nuts 4 and the voussoir 5 that is embedded in cutter hub 1 dovetail groove are pressed on 36 cutters tooth 2 on the cutter hub 1, voussoir 5 is fixed on the cutter hub 1 by screw 6, also has the screwed hole for dismounting usefulness on it.After cutter tooth 2 is fixed on the cutter hub 1, process intensive interrupted worm flank in its surface, blade is promptly on described flank, cutter tooth 2 profile angle α are 20 °, axial pitch A is 7.854mm, axial tooth thickness B is 3.931mm, height of teeth top C is 3.125mm, and to be 6.25mm shave the back profile accuracy in order to guarantee to whole depth D, be assembled on the cutter hub cutter tooth 2 after heat treatment, also should on screw grinder or relief grinder, carry out fine finishining, because shave surplus 0.03～0.05mm only, thus cutter tooth 2 come down to carry out scraping with 0 ° of anterior angle and relief angle, in order to improve the service life of cutter, be convenient to reface, between cutter hub 1 and the cutter tooth 2 adjusting pad 3 arranged.

Stacked worm gear shaver of the present utility model both can carry out free shaving on gear shaving machine, can force shaving again on gear-hobbing machine.

Claims

1, a kind of stacked worm gear shaver, comprise cutter hub 1 and cutter tooth 2, it is characterized in that uniform axial dovetail groove is arranged on the cutter hub 1, cutter tooth 2 is made up of the thin slice in the dovetail groove that is embedded in cutter hub 1, its surface is intensive interrupted worm flank, nut 4 and the voussoir 5 that is embedded in the dovetail groove of cutter hub 1 are pressed on cutter tooth 2 on the cutter hub 1, voussoir 5 is fixed on the cutter hub 1 by screw 6, between cutter hub 1 and the cutter tooth 2 adjusting pad 3 is arranged.