CN103480678A

CN103480678A - Cold extruding manufacturing technique of axial parts

Info

Publication number: CN103480678A
Application number: CN201310388905.6A
Authority: CN
Inventors: 陈军林; 丁文辉
Original assignee: Anhui Mechanical Co Ltd Of Newly Speeding
Current assignee: Anhui Mechanical Co Ltd Of Newly Speeding
Priority date: 2013-08-31
Filing date: 2013-08-31
Publication date: 2014-01-01

Abstract

The invention discloses a cold extruding manufacturing technique of axial parts. The technique comprises the following steps: machining a metal billet to a shape of an axial part; slowly heating the metal billet to a temperature of 820-900 DEG C; preserving the heat for 5-7 hours; cooling to 450-550 DEG C; removing oxide scale on the surface of the metal billet; coating the surface of the metal billet with a lubricant; putting the metal billet into a mold cavity; performing downlink extrusion molding with a press machine. By adopting the technique, energy and raw materials can be saved, working environment can be improved and production cost can also be reduced.

Description

A kind of cold extrusion production process of axial workpiece

Technical field

The present invention relates to the cold extrusion processing technique field, relate in particular to a kind of cold extrusion production process of axial workpiece.

Background technology

At present, axial workpiece adopts the forge hot mode to process more, is about to the blank METAL HEATING PROCESS to higher than forging processing more than recrystallization temperature.Yet in the forge hot mode, heating process need to expend mass energy, if use the unclean energy also can cause environmental pollution, and fortunately cause blank metal cutting loss in forge hot processing, urgently improve.

Summary of the invention

For the problem of prior art existence, the object of the invention is to propose a kind of cold extrusion production process of axial workpiece, to save the energy, improve working environment, and save material, cut down finished cost.

A kind of cold extrusion production process of axial workpiece comprises the following steps:

Metal stock is processed into to the axial workpiece shape;

Described metal stock slowly is heated to 820 ℃ to 900 ℃, is incubated 5 to 7 hours, be cooled to 450 ℃ to 550 ℃;

Remove described metal stock surface scale;

Be coated with lubricant on described metal stock surface;

Described metal stock is put into to mold cavity, by the descending extrusion modling of forcing press.

Preferably, described metal stock slowly is heated to 840 ℃, 860 ℃ or 880 ℃.

Preferably, be incubated 5.5,6 or 6.5 hours.

Preferably, be cooled to 480 ℃, 500 ℃ or 530 ℃.

Preferably, adopt pickling, sandblast, shot-peening or mechanical processing method to remove described metal stock surface scale.

Preferably, describedly on described metal stock surface, be coated with lubricant, be specially: the metal stock of scale removal is placed in boiling water to boil after 20 to 40 minutes and takes out.

In the present invention, can reduce in a large number machining, improve stock utilization, save material, reduce the finished parts cost; Can enhance productivity; Can obtain desirable Part Surface Roughness and dimensional accuracy; The cold work hardening of metal after cold extrusion, and form rational fibre flow distribution at inside parts, make the intensity of part far above raw-material intensity, improve the mechanical property of part; But the part machining shape complexity, that be difficult to machining.

The accompanying drawing explanation

Fig. 1 is the cold extrusion production process flow chart of a kind of axial workpiece in the embodiment of the present invention.

The specific embodiment

Further illustrate technical scheme of the present invention below in conjunction with accompanying drawing and by the specific embodiment:

The embodiment of the present invention provides a kind of cold extrusion production process of axial workpiece, as shown in Figure 1, comprises the following steps:

Step 101, be processed into the axial workpiece shape by metal stock.Add and carry out blanking with band sawing machine man-hour, guarantee the gradient of blank end face within the specific limits, and guarantee the weight of workpiece.

Step 102, slowly be heated to uniform temperature by metal stock, keeps enough time, then cooling with Reasonable Speed, reducing hardness, improve machinability, eliminate residual stress, stable dimensions, minimizing distortion be inclined to crackle.Specifically can carry out non-oxidation annealing with shaft furnace, shaft furnace is periodical furnace, be applicable to the bar class, the heat treatment of longaxones parts, shaft is columnar deep-well, workpiece is vertically packed in stove and is heated by Special crane, concrete technology is: metal stock is heated to 820 ℃ to 900 ℃ (for example 820 ℃, 840 ℃, 860 ℃, 880 ℃, 900 ℃), be incubated 5 to 7 hours (for example 5, 5.5, 6, 6.5, 7 hours), be cooled to 450 ℃ to 550 ℃ (for example 450 ℃ with stove, 480 ℃, 500 ℃, 530 ℃, 550 ℃ etc.), open the bell air cooling, the hardness that makes metal stock is HB140-150.

Step 103, remove the metal stock surface scale.Metal stock under heated condition, with air, contact can react with oxygen generation oxide skin, can pickling, the method for sandblast, shot-peening or machining removes.

Step 104, be coated with lubricant on the metal stock surface.The metal stock of scale removal is placed in boiling water and boils 20 to 40 minutes, for example, about 30 minutes, take out after airing after putting into lubricant and take out.

Step 105, cold extrusion.Metal stock after airing is put into to mold cavity, by the descending extrusion modling of forcing press, can obtain meeting the part of drawing.

The embodiment of the present invention provides the above; it is only the preferably specific embodiment of the present invention; but protection scope of the present invention is not limited to this; anyly be familiar with those skilled in the art in the technical scope that the present invention discloses; be equal to replacement or changed according to technical scheme of the present invention and inventive concept thereof, within all should being encompassed in protection scope of the present invention.

Claims

1. the cold extrusion production process of an axial workpiece, is characterized in that, comprises the following steps:

Metal stock is processed into to the axial workpiece shape;

Remove described metal stock surface scale;

Be coated with lubricant on described metal stock surface;

2. the cold extrusion production process of axial workpiece according to claim 1, is characterized in that, described metal stock slowly is heated to 840 ℃, 860 ℃ or 880 ℃.

3. the cold extrusion production process of axial workpiece according to claim 1, is characterized in that, is incubated 5.5,6 or 6.5 hours.

4. the cold extrusion production process of axial workpiece according to claim 1, is characterized in that, is cooled to 480 ℃, 500 ℃ or 530 ℃.

5. the cold extrusion production process of axial workpiece according to claim 1, is characterized in that, adopts pickling, sandblast, shot-peening or mechanical processing method to remove described metal stock surface scale.

6. the cold extrusion production process of axial workpiece according to claim 1, is characterized in that, describedly on described metal stock surface, is coated with lubricant, is specially: the metal stock of scale removal is placed in boiling water to boil after 20 to 40 minutes and takes out.