CN100560283C - End face is opened the processing method of asymmetric width positioning slot extra thin wall bearing ring chamfer - Google Patents

Abstract

The present invention discloses the processing method that a kind of end face is asymmetric width positioning slot extra thin wall bearing ring chamfer, the surface of roughing bearing ring, process asymmetric wide locating slot with milling machine, in insulating box, bearing ring is heated to 120 ℃～140 ℃ after the heat treatment and carries out the dimensionally stable processing, designing requirement according to the bearing ring chamfering, calculate desired chamfering R size, process the chamfering R model of measuring check and the carbide-tipped lathe tool that grinds cutter head band chamfering R, on numerically controlled lathe, use the light axis bearing ring of the special-purpose soft pawl internal diameter that does not have through quenching, bearing ring rotates with 50～60r/min low velocity, knife rest goes out chamfering R with a Vehicle Processing of the small amount of feeding turning of 0.001～0.003mm, measure with chamfering R model after the turning, check is measured with special-purpose right angle chamfering chi.This method can " not gnawed " and be hindered lathe tool, and the production efficiency height guarantees chamfering R consistent size, and smooth transition satisfies the processing technology requirement.

Description

End face is opened the processing method of asymmetric width positioning slot extra thin wall bearing ring chamfer

Technical field

The invention belongs to the bearing ring processing technique field, specially refer to the processing method that a kind of end face is opened asymmetric width positioning slot extra thin wall bearing ring chamfer.

Background technology

The assembling chamfering of international standard regulation bearing is a round-corner transition, and the finished product bearing need guarantee to assemble chamfering r _1minAnd r _2minCoordinate dimension.General bearing particularly thin wall bearing ring end face does not have locating slot, the assembling chamfering is normally in the machine-shaping of heat treatment front truck, after the heat treatment, the method that adopts string to remove assembling chamfering casting skin makes assembling chamfering smooth transition, and subsequent handling is no longer processed the assembling chamfering.Have the bearing of specific (special) requirements to adopt mill method for processing process and assemble chamfering for the assembling chamfering of high-precision bearing with to the assembling chamfering, working (machining) efficiency is low, is not suitable for producing in enormous quantities.

For the ultra-thin-wall bearing, when the assembling chamfering of bearing ring shapes at the heat treatment front truck, because bearing ring wall thickness utmost point book, after Overheating Treatment, bearing ring inevitably produces bigger distortion and bending, causes the assembling chamfering of bearing ring irregular, can't meet design requirement.If the bearing ring end face has asymmetrical wide locating slot again, as shown in Figure 1, the bearing ring end face has three asymmetric wide locating slots, and then the bearing ring distortion is more irregular, and bearing ring can't guarantee to assemble chamfering r after being processed into finished product _1minAnd r _2minCoordinate dimension, even because of a large amount of waste product of the defective generation of assembling chamfering of bearing ring.

Summary of the invention

For solve thin wall bearing ring particularly end face open the existing problem of asymmetric width positioning slot extra thin wall bearing ring chamfer, the present invention proposes a kind of end face and open the processing method of asymmetric width positioning slot extra thin wall bearing ring chamfer, utilize this method processing, " gnawing " hinders lathe tool in the time of can not rotating to wide locating slot position because of bearing ring, can effectively guarantee assembling assembling chamfering r _1minAnd r _2minConsistent size, make fillet R smooth transition.

For achieving the above object, the present invention adopts following technical scheme:

Described end face is opened the processing method of asymmetric width positioning slot extra thin wall bearing ring chamfer, and this processing method is as follows:

1) by the surface and the acute angle abate of designing requirement roughing bearing ring;

2) process the asymmetric wide locating slot of bearing ring end face with milling machine;

3) in insulating box, bearing ring is heated to 120 ℃～140 ℃ after the heat treatment and carries out the dimensionally stable processing;

4) open the designing requirement of asymmetric width positioning slot extra thin wall bearing ring chamfer according to end face, calculate desired chamfering R size, process the chamfering R model of measuring the check chamfering and the carbide-tipped lathe tool that grinds cutter head band chamfering R;

5) on numerically controlled lathe, use the light axis bearing ring of the special-purpose soft pawl internal diameter that does not have through quenching, so that realize the accurate location of machining bearing ring chamfer;

6) bearing ring is with the rotation of 50～60r/min low velocity, and knife rest uses the carbide-tipped lathe tool of the band chamfering R that grinds that bearing ring chamfering R is carried out a Vehicle Processing with the small amount of feeding turning of 0.001～0.003mm;

7) measure and check chamfering R with chamfering R model after the turning, measure check assembling chamfering r with special-purpose right angle chamfering chi _1minAnd r _2minCoordinate dimension.

Because adopt aforesaid technical scheme, the present invention has following superiority:

Adopt processing method of the present invention, " gnawing " hinders lathe tool in the time of can not rotating to wide locating slot position because of bearing ring, and the production efficiency height can effectively guarantee chamfering r _1minAnd r _2minConsistent size, make chamfering R smooth transition, satisfy the processing request that end face is opened asymmetric width positioning slot extra thin wall bearing ring chamfer.

Description of drawings

Fig. 1 is bearing chamfer r _1minAnd r _2minThe coordinate dimension schematic diagram.

The specific embodiment:

End face of the present invention is the processing method of asymmetric width positioning slot extra thin wall bearing ring chamfer, and this processing method is as follows:

1) by the surface and the acute angle abate of designing requirement roughing bearing ring;

2) process the asymmetric wide locating slot of bearing ring end face with milling machine;

3) in insulating box, bearing ring is heated to 120 ℃～140 ℃ after the heat treatment and carries out the dimensionally stable processing;

4) open the designing requirement of asymmetric width positioning slot extra thin wall bearing ring chamfer according to end face, calculate desired chamfering R size, process the chamfering R model of measuring the check chamfering and the carbide-tipped lathe tool that grinds cutter head band chamfering R;

5) on numerically controlled lathe, use the light axis bearing ring of the special-purpose soft pawl internal diameter that does not have through quenching, so that realize the accurate location of machining bearing ring chamfer;

6) bearing ring is with the rotation of 50～60r/min low velocity, and knife rest uses the carbide-tipped lathe tool of the band chamfering R that grinds that bearing ring chamfering R is carried out a Vehicle Processing with the small amount of feeding turning of 0.001～0.003mm;

7) measure and check chamfering R with chamfering R model after the turning, measure check assembling chamfering r with special-purpose right angle chamfering chi _1minAnd r _2minCoordinate dimension.

The present invention in the bearing ring chamfer machining, should note following some: at first, when heat treatment, should control the quenching distortion of lasso, reduce processing capacity to greatest extent; The second, during light axis bearing ring internal diameter, clamping force is wanted suitably, and clamping force should guarantee that lasso adds minimum and non-slip the getting final product of distortion in man-hour; The 3rd, add man-hour in enormous quantities, should in time change lathe tool behind the tool bit abrasion.

Claims (1)

1, a kind of end face is opened the processing method of asymmetric width positioning slot extra thin wall bearing ring chamfer R, it is characterized in that: this processing method:

1) by the surface and the acute angle abate of designing requirement roughing bearing ring;

2) process the asymmetric wide locating slot of bearing ring end face with milling machine;

3) in insulating box, bearing ring is heated to 120 ℃～140 ℃ after the heat treatment and carries out the dimensionally stable processing;

4) open the designing requirement of asymmetric width positioning slot extra thin wall bearing ring chamfer according to end face, calculate desired chamfering R size, process the chamfering R model of measuring check chamfering R and the carbide-tipped lathe tool that grinds cutter head band chamfering R;

5) on numerically controlled lathe, use the light axis bearing ring of the special-purpose soft pawl internal diameter that does not have through quenching, so that realize the accurate location of bearing ring chamfering R;

6) bearing ring is with the rotation of 50～60r/min low velocity, and knife rest uses the carbide-tipped lathe tool of the band chamfering R that grinds that bearing ring chamfering R is carried out a Vehicle Processing with the small amount of feeding turning of 0.001～0.003mm;

7) measure and check chamfering R with chamfering R model after the turning, measure check assembling chamfering r with special-purpose right angle chamfering chi _1minAnd r _2minCoordinate dimension.

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