CN202114585U

CN202114585U - Special cam grinding fixture of cam shaft

Info

Publication number: CN202114585U
Application number: CN2011201831428U
Authority: CN
Inventors: 徐义明; 姚大树
Original assignee: ANHUI JINGUANG MACHINERY GROUP CO LTD
Current assignee: ANHUI JINGUANG MACHINERY GROUP CO LTD
Priority date: 2011-06-01
Filing date: 2011-06-01
Publication date: 2012-01-18
Anticipated expiration: 2021-06-01

Abstract

The utility model discloses a special cam grinding fixture of a cam shaft, which mainly consists of a bottom plate, a head seat, a front tip, a positioning block, a heart clamp, a rear tip, a crank mechanism, a draw bar, a spring, an end cap, a positioning seat, a positioning rod and the like. The head seat is fixedly mounted at one end of the bottom plate, a tail seat is fixedly mounted at the other end of the bottom plate, the front tip is disposed on an inner side surface of the head seat, the positioning block is fixedly mounted on the upper end surface of the head seat, the rear tip is disposed in the tail seat and extends out of an inner side surface of the tail seat, the draw bar extends out of the rear end surface of the tail seat and is in threaded connection with the rear tip, the spring is sleeved on the draw bar, and the end cap is mounted on the rear end surface of the tail seat and connected with the crank mechanism. A workpiece is directly positioned by a key groove during clamping when a cam is ground, and tolerance of an included angle between a symmetrical center line of the key groove and a symmetrical center line of the cam due to the fact that standards are switched to cause accumulated errors in a manufacturing process is avoided.

Description

A kind of cam ground special fixture of camshaft

Technical field

The utility model relates to the frock manufacturing technology of the cam ground processing work clamping of camshaft, specifically belongs to a kind of cam ground special fixture of camshaft.

Background technology

Cam ground in the camshaft manufacture process adds need guarantee that each cam symmetrical center line and keyway central plane angle are in the deviation range of pattern regulation man-hour; When keyway is positioned at the centre position of camshaft; The special-purpose heart card of cam ground can not be located with keyway during clamping workpiece; Usually needing processing technology benchmark (brill locating hole) on the end bearing axle journal of camshaft, locate with technological datum during cam ground, is benchmark processing keyway again with the technological datum; Because the error accumulation of mismachining tolerance in the manufacture process and the formation of benchmark disunity, it is useless finally to cause camshaft to cause because of keyway central plane and each cam symmetrical center line angle are overproof.

The utility model content

The purpose of the utility model provides a kind of cam ground special fixture of camshaft; Clamping workpiece is directly with the keyway location when realizing cam ground, and the accumulated error of avoiding manufacture process to bring because of the benchmark conversion causes keyway symmetrical center line and cam symmetrical center line angle overproof.

The technical scheme that the utility model adopts is following:

A kind of cam ground special fixture of camshaft mainly is made up of base plate, headstock, preceding top, locating piece, heart card, tailstock, back centre, crank mechanism, pull bar, spring, end cap, positioning seat, backstay etc., and base plate one end is fixed with headstock; The other end installs tailstock, and top before described headstock medial surface is provided with, the upper surface is fixed with locating piece; Locating piece cooperates with the locating slot of the special-purpose heart card of cam ground, is provided with back centre in the described tailstock, and back centre stretches out the tailstock medial surface; Pull bar stretches out the tailstock rear end face, and pull bar and back centre are set with spring through thread connection on the pull bar; The tailstock rear end face is equipped with end cap, is connected with crank mechanism on the end cap.

Said base plate one side is provided with positioning seat, and backstay is housed in the positioning seat.

Said tailstock position can not coexist according to camshaft length and adjusts on the base plate, and positioning seat can not coexist according to the keyway position of camshaft and adjusts on the base plate.

Compared with present technology, the beneficial effect of the utility model is following:

The utility model realizes that technological datum overlaps with design basis, has exempted processing technology benchmark operation, has reduced the camshaft manufacturing cost with the processing of keyway location during to cam ground.

Description of drawings

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

Fig. 2 is the plan structure sketch map of the utility model.

The specific embodiment

Referring to accompanying drawing, a kind of cam ground special fixture of camshaft mainly is made up of base plate 1, headstock 2, tailstock 11, preceding top 3, locating piece 4, heart card 5, back centre 6, crank mechanism handle 7, pull bar 8, positioning seat 9, backstay 10, spring 12, end cap 13 etc.; Base plate 1 one ends are fixed with headstock 2, and the other end installs tailstock 11, before camshaft 14 clampings; Earlier heart card 5 is enclosed within on the little cylindrical of camshaft 14, makes the locating slot of heart card 5 aim at the locating piece 4 on the headstock 2, before little cylindrical end face centre bore is placed on top 3; Press crank mechanism handle 7; Make back centre 6 in tailstock 11, return a segment distance, with unclamping crank mechanism handle 7 behind camshaft 14 other end central aperture back centres 6, under spring 12 elastic force effects; Camshaft 14 hold out against in front and back top on; Rotating cam axle 14 makes the backstay 10 of keyway aligned seat 9 on the camshaft 14, promotes backstay 10 and makes in backstay 10 inserts behind the keyways; Again with locating slot one side of heart card 5 near headstock locating piece 4 on, tighting a bolt makes heart card 5 clamp camshafts 14.Press crank mechanism handle 7; Camshaft 14 is taken off from the special-purpose clamping tool of cam ground in company with heart card 5 together; With camshaft 14 with two ends centre bore positioning and clamping in the front and back of camshaft grinding machine top on; The locating slot of heart card 5 is stuck on the buting iron of the camshaft head of a bed, starts lathe and begins cam ground processing.Anchor clamps tailstock 11 positions can not coexist according to camshaft 14 length and adjust on the base plate 1, and positioning seat 9 can not coexist according to the keyway position of camshaft 14 and adjusts on the base plate 1.

Claims

1. the cam ground special fixture of a camshaft mainly is made up of base plate, headstock, preceding top, locating piece, heart card, tailstock, back centre, crank mechanism, end cap, spring, pull bar, positioning seat, backstay etc., and base plate one end is fixed with headstock; The other end installs tailstock, it is characterized in that: top before described headstock medial surface is provided with, the upper surface is fixed with locating piece; Be provided with back centre in the described tailstock, back centre stretches out the tailstock medial surface, and pull bar stretches out the tailstock rear end face; Pull bar and back centre pass through thread connection; Be set with spring on the pull bar, the tailstock rear end face is equipped with end cap, is connected with crank mechanism on the end cap.

2. the cam ground special fixture of a kind of camshaft according to claim 1, it is characterized in that: said base plate one side is provided with positioning seat, and backstay is housed in the positioning seat.