CN103522180A

CN103522180A - Clamp special for accurate grinding of taper hole of spindle

Info

Publication number: CN103522180A
Application number: CN201310212162.7A
Authority: CN
Inventors: 张琪聪; 杨伟; 殷毓庚
Original assignee: LUOYANG JIAWEI BEARING MANUFACTURING Co Ltd
Current assignee: LUOYANG JIAWEI BEARING MANUFACTURING Co Ltd
Priority date: 2013-05-31
Filing date: 2013-05-31
Publication date: 2014-01-22

Abstract

The invention discloses a clamp special for accurate grinding of a taper hole of a spindle, and belongs to the machining field. The main technical parameter of the spindle is high accuracy of the taper hole, and in order to guarantee the concentricity of the taper hole and a bearing position and the surface roughness of a taper surface, the method that a plug is detached after an outer circle is accurately ground, and then the taper hole is accurately ground is adopted. In the clamping process, three claws clamp the right end of the spindle, an upper central frame supports the left end of the spindle, and the taper hole is ground after correction. The method is high in adjustment and correction difficulty, a hyperbolic curve error is generated if the central height of a part deviates from the central height of a grinding head grinding wheel, the concentricity parameter of the taper hole can not be guaranteed, three supporting points of the central frame rub the accurately ground outer circle in the grinding process, the surface roughness of the outer circle is affected, and the roundness of the outer circle is also affected if the clamping force of the three claws is too large. In order to overcome the defects in the prior art, the clamp special for accurate grinding of the taper hole of the spindle is composed of a socket head cap screw, a pressing plate and a sleeve, and has the advantages of being simple in structure, convenient to machine, convenient to adjustment and correct, and capable of easily guaranteeing the grinding accuracy.

Description

A kind of special fixture that refines spindle taper hole

Technical field

The invention belongs to field of machining, relate in particular to a kind of special fixture that refines spindle taper hole.

Background technology

Main shaft with taper hole is one of common part in machining, and main shaft Morse's taper hole is called instrument circular cone, and tapering approaches 1: 20, and effect is the precision centering of transmitting torque and processing, detection; The high-precision requirement of certain spindle taper hole is the key technical indexes of this main shaft, and taper hole grinding is most important critical process in spindle processing; In order to guarantee that the axiality of taper hole and bearing position and the surface roughness of the conical surface adopt grinding core hole after first cylindrical grinding, be to pull down plug after fine cylindrical, then refine taper hole, typical clamping method is: three-jaw folder main shaft right-hand member, upper centre frame supporting left end, grinding taper hole after centering; It is large that but this method is adjusted centering difficulty, if the center of part is high, to depart from the center of grinding head grinding wheel high, to produce hyperbolic error, the axiality index of taper hole still cannot guarantee, meanwhile, the cylindrical that centre frame three fulcrums rub and refined in grinding process, affects outer round surface roughness, in addition, the excessive circularity that also can affect cylindrical of three-jaw clamping force.

Summary of the invention

In order to solve the deficiencies in the prior art, the invention provides a kind of special fixture that refines spindle taper hole, can process high-precision main shaft taper hole after using this fixture.

In order to achieve the above object, the present invention by the following technical solutions: a kind of special fixture that refines spindle taper hole is mainly comprised of soket head cap screw, pressing plate and sleeve, and wherein, pressing plate is connected by soket head cap screw with sleeve.

Refine a special fixture for spindle taper hole, adopt 6 soket head cap screws to be uniformly distributed with sleeve and to be connected with 6 pressing plates.

The invention has the beneficial effects as follows: compare with other installation way, the special fixture component count of this fine grinding spindle taper hole is few, simple in structure, easy to process, it adopts rational auxiliary base transition, by location and the measurement of sleeve and the several high accuracy mating surfaces of part, be convenient to adjust centering, grinding accuracy easily guarantees, can reach the every high precision technology index request of cone hole machine.

Accompanying drawing explanation

Fig. 1 is a kind of special fixture structural representation that refines spindle taper hole.

Fig. 2 is a kind of special fixture clamping schematic diagram that refines spindle taper hole.

Fig. 3 is a kind of special fixture tube-in-tube structure schematic diagram that refines spindle taper hole.

In figure: 1, soket head cap screw, 2, pressing plate, 3, sleeve, 4, main shaft, 5, grinder chuck.

The specific embodiment

As shown in fig. 1, a kind of special fixture that refines spindle taper hole, is mainly comprised of soket head cap screw 1, pressing plate 2 and sleeve 3, and wherein, pressing plate 2 is connected by soket head cap screw 1 with sleeve 3.

As shown in Figure 3, the lower surface of sleeve 3 requires surface roughness maximum permissible value Ra0.4, and flatness is less than 0.001mm, can reach by lappingout after plain grinding; The mating surfaces such as Element Design benchmark bearing position cylindrical Φ 80 and main shaft left side, cylindrical Φ 108 right sides, cylindrical Φ 80g6 are cylindrical grinder and grind in clamped one time, and through corase grind, fine grinding two procedures, positional precision is better than drawing requirement, and special fixture is usingd it as the auxiliary base of locating and measuring.

As shown in Figure 2, grinder chuck 5 is inhaled sleeve 3 lower surfaces, by sleeved 3 upper surfaces of grinder, require upper and lower end face depth of parallelism < 0.002mm, during use, first main shaft 4 is packed into sleeve 3 endoporus, sleeve 3 upper surfaces lean main shaft 4 Φ 108 cylindrical right sides, then connect main shaft 4 and sleeve 3 with 6 M10 soket head cap screws 1 and pressing plate 2; School main shaft 4 cylindrical Φ 80g6 and the left side < 0.002mm that beats, the position of accurate adjustment main shaft 4 and special fixture assembly, tightens screw after adjusting to the right place; In process, utilize this special fixture, take the method for shaft shoulder location, global displacement centering, the centre of gyration line that can guarantee taper hole center line and grinding head grinding wheel contour is in the horizontal direction adjusted to optimum.

Claims

1. a special fixture that refines spindle taper hole, is characterized in that: mainly soket head cap screw (1), pressing plate (2) and sleeve (3), consist of, wherein, pressing plate (2) is connected by soket head cap screw (1) with sleeve (3).

2. a kind of special fixture that refines spindle taper hole according to claim 1, is characterized in that: adopt 6 soket head cap screws (1) and 6 pressing plates (2) to be uniformly distributed with sleeve (3) and be connected; Grinder chuck (5) is inhaled sleeve (3) lower surface.