CN103752925A - Key slot finish-milling process for automobile brake adjustment arm cast part - Google Patents

Abstract

The invention discloses a key slot finish-milling process for an automobile brake adjustment arm cast part. The process mainly comprises the following steps: (1) firstly, forming a 28mm key slot through rough milling to guarantee the size of 27.8mm, wherein the cutting allowance is 1.8mm, a coarse-tooth cylindrical vertical milling cutter is selected, machining is completed through cutter feeding twice, and the feed amount of each tooth is 0.25mm; (2) then, taking the outside diameter d of a milling cutter as 20mm, setting the actual cutting speed to 18.84m/min, setting the feed amount to 225mm/min, and setting the cutting time to 0.4min; (3) carrying out finish-milling on the key slot to guarantee the size, wherein the single-sided cut depth is 0.1mm, and a fine-tooth cylindrical vertical milling cutter is selected. The process has the beneficial effects that through the cast part produced by the process, the stability of brakes can be improved, the tensile strength can be enhanced, vibration or shock can be withstood, the process is applicable to large-batch production and is relatively low in cost, and improvement carried out according to different models of automobiles is facilitated.

Description

A kind of braking automobile is adjusted the finish-milling keyway technique of arm foundry goods

Technical field

The present invention relates to automobile technical field, relate in particular to a kind of finish-milling keyway technique of braking automobile adjustment arm foundry goods.

Background technology

Along with the progress of technology; the front brake of automobile is adjusted arm shell and is being brought into play more and more important effect; its Main Function is front brake to be adjusted to arm support and protect, and Ta center is a splined hole, and outside is worm-gear toothing; there is a worm shaft side; on head, have a four directions, adjust brake use, outermost has a hole; dress pin connects wheel cylinder, and hole and keyway and axle coordinate transmitting torque to reach the effect of adjusting brake.Foundry goods is wherein for supporting and protection front brake adjustment arm; also carry-over moment of while, therefore has some strength requirement to part, should possess certain tensile strength and can bear vibrations or impact; if these foundry goods are produced in enormous quantities, need lower cost.

Thereby, for front brake, adjust the processing of arm foundry goods, particularly for the finish-milling keyway technique of foundry goods, 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 finish-milling keyway technique that improves the degree of stability of braking, can improve tensile strength, can bear the braking automobile adjustment arm foundry goods that vibrates or impact, is applicable to production in enormous quantities, is 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:

Braking automobile is adjusted a finish-milling keyway technique for arm foundry goods, mainly following steps, consists of:

(1) first, rough mill 28mm keyway and guarantee size 27.8mm, chipping allowance is 1.8mm, selects bastard vertical cylinder milling cutter, and feed completes at twice, and the clamping force that reduces fixture reduces load, and getting feed engagement is 0.25mm/ tooth;

(2) then, get milling cutter outside diameter d=20mm, set actual cut speed 18.84m/min, amount of feeding 225mm/min per minute, 0.4min while setting skiver;

(3) finish-milling keyway, guarantees size, and monolateral cutting depth 0.1mm, selects serration vertical cylinder milling cutter;

(4) vertical milling cutter arranges actual cut speed 19.86m/min, amount of feeding 200mm/min per minute, 0.2min while setting skiver.

The beneficial effect that braking automobile of the present invention is adjusted the finish-milling keyway technique of arm foundry goods is: the foundry goods of producing by the method can improve brake degree of stability, can improve tensile strength, can bear vibration or impact, be applicable to producing in enormous quantities, cost is lower, is convenient to improve according to different automobile types.

The specific embodiment

Described in the embodiment of the present invention, braking automobile is adjusted the finish-milling keyway technique of arm foundry goods, mainly following steps, consists of:

(1) first, rough mill 28mm keyway and guarantee size 27.8mm, chipping allowance is 1.8mm, selects bastard vertical cylinder milling cutter, and feed completes at twice, and the clamping force that reduces fixture reduces load, and getting feed engagement is 0.25mm/ tooth;

(2) then, get milling cutter outside diameter d=20mm, set actual cut speed 18.84m/min, amount of feeding 225mm/min per minute, 0.4min while setting skiver;

(3) finish-milling keyway, guarantees size, and monolateral cutting depth 0.1mm, selects serration vertical cylinder milling cutter;

(4) vertical milling cutter arranges actual cut speed 19.86m/min, amount of feeding 200mm/min per minute, 0.2min while setting skiver.

Claims (1)

1. braking automobile is adjusted a finish-milling keyway technique for arm foundry goods, it is characterized in that, mainly following steps, consists of:

(1) first, rough mill 28mm keyway and guarantee size 27.8mm, chipping allowance is 1.8mm, selects bastard vertical cylinder milling cutter, and feed completes at twice, and the clamping force that reduces fixture reduces load, and getting feed engagement is 0.25mm/ tooth;

(2) then, get milling cutter outside diameter d=20mm, set actual cut speed 18.84m/min, amount of feeding 225mm/min per minute, 0.4min while setting skiver;

(3) finish-milling keyway, guarantees size, and monolateral cutting depth 0.1mm, selects serration vertical cylinder milling cutter;

(4) vertical milling cutter arranges actual cut speed 19.86m/min, amount of feeding 200mm/min per minute, 0.2min while setting skiver.