CN2553953Y

CN2553953Y - Linear motion ball bearing track grinding fixture

Info

Publication number: CN2553953Y
Application number: CN 02274170
Authority: CN
Inventors: 尤凤伦
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-07-11
Filing date: 2002-07-11
Publication date: 2003-06-04
Anticipated expiration: 2012-07-11

Abstract

The utility model discloses a linear motion ball bearing race grinding clamp, consisting of an idler wheel, a fulcrum and a back cushion. The utility model is characterized in that the idler wheel is divided into an upper idler wheel 1 and a lower idler wheel 3; the lower part of the lower idler wheel workpiece forms two-point supporting; the fulcrum 4 and the external round surface at one side of the workpiece form two supporting points; the back cushion 5 restricts the axial displacement of a pipe. The utility model is mainly applied to the grinding process of the internal hole of a high precision hollow cylinder; the difference between the roundness of the grinded hole and the wall thickness is not more than 3 Mu meters. The utility model is especially suitable for the grinding process of linear motion ball bearing races.

Description

Ball bushing raceway clamp

Affiliated field:

The utility model belongs to a kind of clamp, is mainly used in the mill processing of ball bushing raceway, also can be used for the high accuracy mill processing of other high accuracy hollow cylinder endoporus.

Background technology

The existing anchor clamps that are used for the grinding endoporus as electric magnetic no-core clamp, only are applicable to the short shape workpiece of processing major diameter hole below 0.3.Big to draw ratio, owing to the influence of external diameter to the end face vertical difference, workpiece can produce swing in rotary course, thereby makes the hole very big to the wall thickness difference of external diameter, does not reach specification requirement.The another kind of anchor clamps of using in the past, the spring diaphragm anchor clamps, because centering precision is poor, workpiece is poor, can only reach 10 μ m, so can not be used for the high part of machining accuracy.

Technical scheme:

The utility model discloses a kind of ball bushing raceway grinding folder, by roller, fulcrum, back cushion is formed, it is characterized in that roller is divided into upper roller 1 and bottom roller 3, last bottom roller rotates synchronously, be in the upper-lower position in workpiece 2 same cross sections respectively, bottom roller is thick a wheel, two outers of wheel and workpiece below form 2 supports, described fulcrum 4 is that the position is in workpiece one side, be fixed in two poles on the table top, one side periphery of pole and workpiece forms two strong points, described back cushion 5 be one at the stopping means that is in tubular workpiece one end, the axial displacement of restriction pipe fitting, wherein the strong point of upper roller 1 and pipe fitting formation is in the centre position of bottom roller two strong points.

The utility model is mainly used in the mill processing of high accuracy hollow cylinder endoporus, and the circularity and the wall thickness difference of mill processing metapore are not more than 3 μ m.

Description of drawings

Fig. 1 is the utility model structural representation.

The A of Fig. 2 bitmap 1 is to view.

Fig. 3 is the workpiece and fulcrum 4 locations drawing.

Structure of the present utility model as shown in Figure 1,2 are the workpiece that is ground, 1 and 3 be roller, 4 for fulcrum, 5 be back cushion.When upper roller 1 moves down when pressing to workpiece 2, workpiece is closely pressed to bottom roller 3 and fulcrum 4, workpiece is located reliably.Grinding process is needed to rotatablely move because the rotation of roller 1 and 3, drive workpiece 2 around the rotation of axle core, have formed.Because bottom roller 3 has two points to contact with the workpiece below, fulcrum 4 the workpiece horizontal direction also with two points with contact therebetween, formed four point locations of workpiece, retrained four frees degree of workpiece, retrained the free degree that Y, Z both direction move and the free degree of rotating along Y, Z axle.And back cushion 5 has and has retrained the free degree that moves along X-axis.Five points have retrained five frees degree altogether, the free degree that only remaining workpiece rotates, the i.e. free degree of rotating along X-axis.The utility model is with external diameter four point locations, can not radially wobble in the workpiece rotary course, so the wall thickness difference is good.

Claims

1. ball bushing raceway clamp, by roller, fulcrum, back cushion is formed, it is characterized in that roller is divided into upper roller (1) and bottom roller (3), last bottom roller rotates synchronously, be in the upper-lower position in the same cross section of workpiece (2) respectively, bottom roller is thick a wheel, two outers of wheel and workpiece below form 2 supports, described fulcrum (4) is to be positioned at workpiece one side, be two poles of being fixed on the table top, one side periphery of pole and workpiece forms two strong points, described back cushion (5) be one at the stopping means that is in tubular workpiece one end, the axial displacement of restriction pipe fitting, wherein the strong point of upper roller (1) and pipe fitting formation is in the centre position of bottom roller two strong points.