CN201988980U

CN201988980U - Pitch circle fixture

Info

Publication number: CN201988980U
Application number: CN2011201218956U
Authority: CN
Inventors: 钱勇军; 赵立志; 李海永; 杨国斌; 宋新文; 赵建红; 薛丹丹; 孟祥权
Original assignee: China National Heavy Duty Truck Group Datong Gear Co Ltd
Current assignee: China National Heavy Duty Truck Group Datong Gear Co Ltd
Priority date: 2011-04-23
Filing date: 2011-04-23
Publication date: 2011-09-28
Anticipated expiration: 2021-04-23

Abstract

The utility model relates to a positioning and clamping device, particularly to a pitch circle fixture used for finish machining after a gear undergoes heat treatment, which solves the problems that the existing barrel pitch circle fixture shelters the end surface of a gear during the turning and grinding processes, and the inner hole and the end surface of the gear cannot be finished at one step. The pitch circle fixture comprises a fractural annular retainer; a plurality of position-corresponding radial steel wire grooves are formed at the upper and the lower ends of the retainer; a through hole is formed between each pair of steel wire grooves; a pitch circle rod is arranged on the inner wall of the retainer in the position corresponding to the through hole; and a steel wire penetrates into the axis center of the pitch circle rod, and both ends of the steel wire pass into the through hole via the steel wire groove. The utility model has a rational and reliable structural design, so as to improve the production efficiency and ensure the roundness and the dimension accuracy of a part after machining. The pitch circle fixture has the advantages of simple structure, convenience in operation and low cost.

Description

Pitch-line chuck

Technical field

The utility model relates to positioning clamping device, is specially employed pitch-line chuck when carrying out fine finishining after a kind of gear heat treatment.

Background technology

Pitch-line chuck is mainly used in fine finishining bore and end face after the heat treatment, is the high-precision positioner of fine finishining other products characteirstic element after the gear heat treatment.Present pitch-line chuck adopts barrel formula pitch circle folder more, blocks gear face during clamping, and bore and end face can not a turning be finished or grinding is finished, and are subjected to the influence of lathe clamping force to produce deviation from circular from when processing thin-walled part.

Summary of the invention

The utility model is clipped in and blocks the problem that gear face and endoporus and end face can not process at one time in car, the grinder preface in order to solve an existing bucket formula pitch circle, and a kind of pitch-line chuck is provided.

The utility model is to adopt following technical scheme to realize: pitch-line chuck, comprise the ring-type retainer that has fracture, the upper and lower end face of retainer has some steel radial grooves to the position correspondence, have through hole between every pair of steel wire trough, retainer inwall and lead to the hole site corresponding position are provided with the pitch circle rod, and the place, axle center of pitch circle rod is installed with the steel wire of two ends in steel wire trough is through through hole.In use, retainer is installed on the gear easily, when lathe clamps, return to the axiality that the retainer surfaces externally and internally has again and require, solved existing bucket formula pitch circle and be clipped in and block the problem that gear face and endoporus and end face can not process at one time in car, the grinder preface.

The utility model reasonable in design is reliable, has guaranteed circularity and the dimensional accuracy after the part processing when enhancing productivity, and has advantage simple in structure, easy to operate and that cost is low.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the schematic side view of Fig. 1.

Among the figure: 1-retainer, 2-steel wire trough, 3-through hole, 4-pitch circle rod, 5-steel wire.

The specific embodiment

Pitch-line chuck, comprise the ring-type retainer 1 that has fracture, the upper and lower end face of retainer 1 has some steel radial grooves 2 to the position correspondence, have through hole 3 between every pair of steel wire trough 2, retainer 1 inwall and corresponding position, through hole 3 position are provided with pitch circle rod 4, and the place, axle center of pitch circle rod 4 is installed with the steel wire 5 of two ends in steel wire trough 2 is through through hole 3.In the specific implementation process, retainer 1 is made by elastomeric material, during processing thin-walled part, can be according to the actual conditions of lathe and the distortion situation of processed gear, on circumference, increase pitch circle rod quantity, utilize the support of C type retainer and, eliminate the distortion of thin-walled parts when clamping, guarantee circularity and dimensional accuracy after the part processing the distributional effects of clamping force; After heat treatment in the Vehicle Processing, can directly use soft three-jaw clamping retainer outer wall, avoid because of clamping pitch circle rod (some contact) damages the three-jaw surface, thereby influenced the circular runout of part, use soft pawl to substitute hard pawl simultaneously, shorten the time of changing product time and turning centering three-jaw.

Claims

1. pitch-line chuck, it is characterized in that: comprise the ring-type retainer (1) that has fracture, the upper and lower end face of retainer (1) has some steel radial grooves (2) to the position correspondence, have through hole (3) between every pair of steel wire trough (2), retainer (1) inwall and through hole (3) corresponding position, position are provided with pitch circle rod (4), and the place, axle center of pitch circle rod (4) is installed with the steel wire (5) of two ends in steel wire trough (2) is through through hole (3).