CN102166610A - Method for processing drive axle half-axle gear by hot forging - Google Patents

Abstract

The invention relates to a method for processing a drive axle half-axle gear by hot forging. The drive axle half-axle gear processed by using the method has the advantages of high accuracy, high quality and excellent rigidity and toughness. The method disclosed by the invention mainly comprises the following steps of: heating a blank, and then performing molding, rough forging, punching, fine forging and other process steps. In the method, the whole process flow can be completed under the condition that the original blank is heated only once in the production process; time and electricity are saved; and the prepared drive axle half-axle gear has the advantages of high accuracy, good mechanical strength and the like.

Description

Method with forge hot processing half shaft gear

Technical field

What the present invention relates to is a kind of hot forging method of technical field of forging, is specifically related to the hot forging method of half shaft gear.

Background technology

The axle shaft gear shape is very complicated, its profile is made up of bevel gear and step cylinder, its interior shape is an internal spline, and machining accuracy and mechanical performance all there is very high requirement, existing processing technology is to adopt mill teeth, gear-shaping, forging blind hole etc. to the processing of gear shape, this processing technology exists the utilization rate of material low and working (machining) efficiency is low, and equipment investment and instrument cost are higher.

Summary of the invention

The objective of the invention is to overcome the deficiencies in the prior art, propose a kind of method, make the half shaft gear that processes have high accuracy, high-quality and favorable rigidity and toughness with forge hot processing half shaft gear.

Processing technology of the present invention may further comprise the steps:

Step 1, blanking, the round steel blank of following predetermined;

Step 2, heating blank: make this blank in intermediate frequency furnace, be heated to 850～900 ℃;

Step 3, draw shape, blank is inserted draw in the shape mould, draw and form shape, what obtain that blind hole do not have a profile of tooth draws the shape part;

Step 4, rough forge will draw the shape part and insert in the rough forge mould, carry out rough forge and be shaped, and obtain the rough forge spare that blind hole has profile of tooth;

Step 5, side cut are inserted rough forge spare in the shaving die, and the overlap in the big cylindrical of tooth portion is excised;

Step 6, punching are put into punching die to the rough forge spare after cutting edge, and dash the blind hole of rough forge spare logical;

Step 7, finish forge are inserted the rough forge spare after the punching in the finish forge mould, carry out precision forging, obtain finish-forging spare.

Description of drawings

The present invention will be described in detail below in conjunction with accompanying drawing;

Fig. 1 is a procedure of processing of the present invention;

The specific embodiment

As shown in Figure 1, a kind of method with forge hot processing half shaft gear, present embodiment is selected 457 rear axle shaft gears for use, and its thermal forging technology step is as follows:

Step 1, blanking, the round steel blank 1 of following predetermined;

Step 2, heating blank are put into round steel blank 1 in the intermediate frequency furnace, by current flow heats to 850～900 ℃, and are incubated 6 minutes;

Step 3, draw shape, the round steel blank 1 after the heating is put into drawn the shape mould, tentatively draw and form shape, what obtain that blind hole do not have a profile of tooth draws shape part 2;

Step 4, rough forge will draw on the shape part 2 oxide layer earlier and remove, and insert then in the rough forge mould, carry out rough forge, obtain the rough forge spare 3 that blind hole has profile of tooth;

Step 5, side cut are put into rough forge spare 3 in the shaving die, the excision of the overlap in the big cylindrical of tooth portion, obtain preliminarily forming spare 4;

Step 6, punching place preliminarily forming spare 4 under the punching die and to dash logically with the punch holder blind hole, obtain forging 5 just;

Step 7, finish forge are put into finish forge mould and are carried out finish forge having dashed first forging 5 behind the hole at last, obtain finish-forging spare 6.

Technology of the present invention only needs initial blank heating once just can be finished whole process flow in the converted products process, and characteristics such as save time, precision height, the mechanical strength of power saving and the half shaft gear that processes are good.

Claims (2)

1. with the method for forge hot processing half shaft gear, its step is as follows:

Step 1, blanking, the round steel blank of following predetermined;

Step 2, heating blank;

Step 3, draw shape, blank is inserted draw in the shape mould, draw and form shape, what obtain that blind hole do not have a profile of tooth draws the shape part;

Step 4, rough forge will draw the shape part and insert in the rough forge mould, carry out rough forge and be shaped, and obtain the rough forge spare that blind hole has profile of tooth;

Step 5, side cut are inserted rough forge spare in the shaving die, and the overlap in the big cylindrical of tooth portion is excised;

Step 6, punching are put into punching die to the rough forge spare after cutting edge, and dash the blind hole of rough forge spare logical;

Step 7, finish forge are inserted the rough forge spare after the punching in the finish forge mould, carry out precision forging, obtain finish-forging spare.

2. the method with forge hot processing half shaft gear according to claim 1 is characterized in that:

In the above-mentioned steps two, blank is placed in the intermediate frequency furnace by current flow heats to 850～900 ℃, and is incubated 6 minutes.

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