CN103738392A - Process for drilling small cylindrical face holes in two ends of bearing support of automobile - Google Patents

Abstract

The invention discloses a process for drilling small cylindrical face holes in the two ends of a bearing support of an automobile. The process mainly comprises the following steps that (1), a workpiece material HT200 is machined, the machining roughness is 12 micrometers, a Z3025 vertical drill machine and a small straight-shank twist drill are adopted, and d is 7.2mm; (2), the feed amount is determined according to the machining requirement, and when the machining requirement is the harness HBS200 of the H12-HB precision cast iron f is 0.36-0.44mm/r; (3), the grinding pure standard and the service life of a drill bit are determined, and when d is 8mm, the maximum abrasion loss of the rear cutting surface of the drill bit is 0.8mm and the service life T is 30min; (4), the cutting speed is determined. The process has the advantages that bearings machined according to the process facilitate stabilizing rollers, can be improved conveniently according to different automobile types and are convenient to replace or maintain timely, and balls are fixed conveniently when the bearings are installed.

Description

The brill face of cylinder, a kind of automobile bearing support two ends aperture technique

Technical field

The present invention relates to automobile technical field, relate in particular to the brill face of cylinder, a kind of automobile bearing support two ends aperture technique.

Background technology

Along with the progress of technology, in the front and Frontal offset impact process of car load, when often there is machinery space and causing chaufeur shank and step space by compression to the space invasion of driving compartment, steering column mandrel makes its chest injury evil or directly causes chaufeur death to chaufeur chest play, leg room is extruded and increases rescue difficulty, therefore collapse type tubing string is widely applied on car load, and shrinkable sliding steering tween drive shaft is also applied on car load gradually simultaneously.

At present, turn to transmission tween drive shaft mostly to be splined sleeve and castellated shaft is in mating connection, spline fitted is conducive to turn to the flexible of transmission tween drive shaft, is convenient to plant personnel assembling and is conducive to turn to the crumple of transmission tween drive shaft simultaneously when there is car load collision.Client requires also more and more higher to car load traveling comfort, the particularly traveling comfort of handling maneuver can affect lubricated reliability because heating up and lacking lubricant but turn in the long-term use procedure of transmission tween drive shaft; Splined sleeve is the inner vacuum that easily forms in use, affects the slip of tween drive shaft, reduces the traveling comfort of steering operation.

Thereby, for the bearing support of tween drive shaft, the processing of carrying out two end faces need to be set, for the processing of this brill face of cylinder, part two ends aperture, exist certain drawback, therefore, for above aspect, need to make effective innovation.

Summary of the invention

The object of this invention is to provide a kind of can minimizing accident in the chaufeur brill face of cylinder, the automobile bearing support two ends aperture technique that meets with dangerous degree, be conducive to firm roller, be beneficial to fixing ball when mounted, be convenient to improve according to different automobile types, to solve many deficiencies of prior art.

Object of the present invention is carried out specific implementation by the following technical programs:

The brill face of cylinder, a kind of automobile bearing support two ends aperture technique, is mainly comprised of following steps:

(1) first, processing work material HT200, processing roughness is 12 μ m, lathe: Z3025 drilling machine, cutter straight shank twist drill bit d=7.2mm, cutting compound is triethanolamine;

(2) then, by processing request, determine the amount of feeding, when processing request is H12 ~ HB precision hardness of cast HBS200, f=0.36 ~ 0.44mm/r;

(3) determine the pure standard of bit grinding and life-span, when d=8mm, after drill bit, knife face greatest wear measures the life-span T=30min into 0.8mm;

(4) last, determine cutting rate, hardness HBS200～219, f=1.0mm/r, d0<25mm, c=25m/min, n=400r/min.

The beneficial effect of the brill face of cylinder, automobile bearing support of the present invention two ends aperture technique is: the bearing support parts of producing by the method can minimizing accident in chaufeur meet with dangerous degree, be conducive to firm roller, be beneficial to when mounted fixing ball, be convenient to improve according to different automobile types, be convenient to change timely or safeguard.

The specific embodiment

The brill face of cylinder, automobile bearing support two ends aperture technique described in the embodiment of the present invention, is mainly comprised of following steps:

(1) first, processing work material HT200, processing roughness is 12 μ m, lathe: Z3025 drilling machine, cutter straight shank twist drill bit d=7.2mm, cutting compound is triethanolamine;

(2) then, by processing request, determine the amount of feeding, when processing request is H12 ~ HB precision hardness of cast HBS200, f=0.36 ~ 0.44mm/r;

(3) determine the pure standard of bit grinding and life-span, when d=8mm, after drill bit, knife face greatest wear measures the life-span T=30min into 0.8mm;

(4) last, determine cutting rate, hardness HBS200～219, f=1.0mm/r, d0<25mm, c=25m/min, n=400r/min.

Claims (1)

1. the brill face of cylinder, an automobile bearing support two ends aperture technique, is characterized in that, mainly following steps, consists of:

(1) first, processing work material HT200, processing roughness is 12 μ m, lathe: Z3025 drilling machine, cutter straight shank twist drill bit d=7.2mm, cutting compound is triethanolamine;

(2) then, by processing request, determine the amount of feeding, when processing request is H12 ~ HB precision hardness of cast HBS200, f=0.36 ~ 0.44mm/r;

(3) determine the pure standard of bit grinding and life-span, when d=8mm, after drill bit, knife face greatest wear measures the life-span T=30min into 0.8mm;

(4) last, determine cutting rate, hardness HBS200～219, f=1.0mm/r, d0<25mm, c=25m/min, n=400r/min.