CN111992982A - Automatic method for forming integral drive axle - Google Patents
Automatic method for forming integral drive axle Download PDFInfo
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- CN111992982A CN111992982A CN201910445257.0A CN201910445257A CN111992982A CN 111992982 A CN111992982 A CN 111992982A CN 201910445257 A CN201910445257 A CN 201910445257A CN 111992982 A CN111992982 A CN 111992982A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60B—VEHICLE WHEELS; CASTORS; AXLES FOR WHEELS OR CASTORS; INCREASING WHEEL ADHESION
- B60B35/00—Axle units; Parts thereof ; Arrangements for lubrication of axles
- B60B35/12—Torque-transmitting axles
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Abstract
The invention discloses an automatic method for forming an integral drive axle. The method comprises the following steps: carrying out primary sawing and blanking on the shaft tube by adopting a double-upright-column horizontal band sawing machine to obtain a blanked workpiece; punching a tracking steel code on the outer surface of the middle part of the blanked workpiece; respectively carrying out four times of heat treatment and four times of extrusion thickening on two end parts of a shaft body of the workpiece with the tracking steel code; performing second sawing on the workpiece subjected to the four heat treatments and the four extrusion thickening; pushing the middle part of the shaft body of the workpiece sawed for the second time to be square by a circle; carrying out plasma cutting on the pushed workpiece; performing fifth heating treatment on the workpiece subjected to the plasma cutting; carrying out three times of extrusion on the workpiece subjected to the fifth heating treatment to obtain a forming die; quenching and tempering heating treatment are carried out on the forming die; and performing shot blasting treatment on the workpiece subjected to quenching and tempering heating treatment to obtain the integral drive axle forming workpiece. The invention can improve the product performance, reduce the production cost and improve the market competitiveness.
Description
Technical Field
The invention relates to the field of automobile lightweight, in particular to an automatic method for forming an integral drive axle.
Background
Under the era background of rapid development of automobile lightweight technology, application of new materials, development of new processes and new optimization methods gradually become the technological keys of great attention in the automobile industry. The automobile driving axle housing is one of the most important parts of the whole automobile, and directly influences the important performances of the heavy automobile, such as the bearing capacity, the transportation capacity, the safety and the like.
At present, the domestic process for manufacturing the driving axle housing mainly adopts a casting process and a stamping and welding process. The former has the defects of low material utilization rate, low production efficiency and high rejection rate; the latter is then the technology loaded down with trivial details, and used equipment and frock investment are big, and can lead to axle housing fatigue resistance to reduce because of welding deformation, influence life. In order to overcome the defects in the prior art, domestic truck manufacturers urgently need to research and develop an advanced drive axle housing manufacturing process so as to improve the product performance, reduce the production cost and improve the market competitiveness.
Disclosure of Invention
The invention aims to provide an automatic method for forming an integral drive axle, which can improve the product performance, reduce the production cost and improve the market competitiveness.
In order to achieve the purpose, the invention provides the following scheme:
an automated method of forming an integral drive axle, comprising:
carrying out primary sawing and blanking on the shaft tube by adopting a double-upright-column horizontal band sawing machine to obtain a blanked workpiece;
marking a tracking steel code on the outer surface of the middle part of the blanked workpiece by using a pneumatic floating marking machine;
respectively carrying out four times of heat treatment and four times of extrusion thickening on two end parts of a shaft body of the workpiece with the tracking steel code;
performing secondary saw cutting on the workpiece subjected to the four-time heat treatment and the four-time extrusion thickening by adopting a two-end double-upright-column horizontal band sawing machine;
pushing the middle part of the shaft body of the workpiece sawed for the second time to be square by a circle;
carrying out plasma cutting on the pushed workpiece;
performing fifth heating treatment on the workpiece subjected to the plasma cutting;
carrying out three times of extrusion on the workpiece subjected to the fifth heating treatment to obtain a forming die;
quenching and tempering heating treatment are carried out on the forming die;
and performing shot blasting treatment on the workpiece subjected to quenching and tempering heating treatment to obtain the integral drive axle forming workpiece.
Optionally, the four heat treatments and the four extrusion thickenings are respectively performed on two end portions of the shaft body of the workpiece with the tracking steel code, and the method specifically includes:
carrying out first heat treatment on the middle part of the shaft body of the workpiece with the tracking steel code;
carrying out primary extrusion thickening on the middle part of the shaft body of the workpiece subjected to primary heat treatment by adopting a horizontal double-head extruder;
carrying out secondary heat treatment on the two end parts of the shaft body of the workpiece which is extruded and thickened for the first time;
carrying out secondary extrusion thickening on the middle part of the shaft body of the workpiece subjected to secondary heat treatment by adopting a horizontal double-head extruder;
carrying out third heat treatment on the two end parts of the shaft body of the workpiece which is extruded and thickened for the second time;
carrying out third extrusion thickening on the middle part of the shaft body of the workpiece subjected to the third heat treatment by adopting a horizontal double-head extruder;
carrying out fourth heat treatment on the two end parts of the shaft body of the workpiece extruded and thickened for the third time by adopting an intermediate frequency heating furnace;
and (4) performing fourth extrusion thickening on the middle part of the shaft body of the workpiece subjected to the fourth heat treatment by adopting a horizontal double-head extruder.
Optionally, the first heat treatment of two end portions of the shaft body of the workpiece with the tracking steel code includes:
heating the middle part of the shaft body by adopting an intermediate frequency preheating furnace to 200-300 ℃;
performing graphite roll coating on the middle section area of the shaft tube of the heated workpiece by adopting a middle roll coating graphite machine;
and heating the middle part of the shaft body of the workpiece subjected to graphite roll coating by adopting intermediate frequency heating furnaces at two ends to reach the heating temperature of 1100-1300 ℃.
Optionally, adopt horizontal double-end extruder to carry out extrusion bodiness for the first time to the axis body middle part of the work piece of first heat treatment, specifically include:
and (3) automatically carrying out axial centering and positioning on the workpiece shaft body subjected to the first heat treatment by adopting a horizontal double-head extruder, and extruding and thickening the middle part of the positioned shaft body.
Optionally, the middle part of the shaft body of the workpiece sawed for the second time is pushed by a circle to be square, and the method specifically includes:
and (4) pushing the middle part of the shaft body of the workpiece sawed for the second time by a square pushing machine in a circular manner, and displaying and uploading extrusion pressure and time in real time.
Optionally, the plasma cutting is performed on the workpiece after the pushing, specifically including:
and carrying out plasma cutting on the pushed workpiece by adopting a plasma cutting machine.
Optionally, the fifth heat treatment of the workpiece after the plasma cutting specifically includes:
and carrying out fifth heating treatment on the workpiece subjected to the plasma cutting by adopting an intermediate frequency heating furnace.
Optionally, the extruding the workpiece after the fifth heating treatment for three times to obtain the forming die specifically includes:
axially centering and positioning the workpiece subjected to the fifth heating treatment by adopting a 250T press, and carrying out extrusion forming on the centered and positioned middle process hole part of the shaft body to obtain a first forming die;
axially centering and positioning the first forming die by adopting a 400T press, and carrying out extrusion forming on the centered and positioned middle process hole part of the shaft body to obtain a second forming die;
and axially centering and positioning the second forming die by adopting an 800T press, and carrying out extrusion forming on the centered and positioned middle process hole part of the shaft body to obtain the forming die.
Optionally, the quenching and tempering heat treatment of the forming mold specifically includes:
and quenching and tempering heating treatment is carried out on the forming die by adopting stepping type quenching and tempering heat treatment equipment, and extrusion pressure and time are displayed and uploaded in real time.
Optionally, the shot blasting treatment of the workpiece subjected to quenching and tempering heating treatment to obtain the integral drive axle forming workpiece specifically includes:
shot blasting treatment is carried out on the inner surface and the outer surface of the workpiece subjected to quenching and tempering heating treatment by using a shot blasting machine, and shot blasting pressure and shot blasting speed are uploaded in real time.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects: the invention provides an automatic method for forming an integral drive axle, which comprises the following steps: carrying out primary sawing and blanking on the shaft tube by adopting a double-upright-column horizontal band sawing machine to obtain a blanked workpiece; marking a tracking steel code on the outer surface of the middle part of the blanked workpiece by using a pneumatic floating marking machine; respectively carrying out four times of heat treatment and four times of extrusion thickening on two end parts of a shaft body of the workpiece with the tracking steel code; performing secondary saw cutting on the workpiece subjected to the four-time heat treatment and the four-time extrusion thickening by adopting a two-end double-upright-column horizontal band sawing machine; pushing the middle part of the shaft body of the workpiece sawed for the second time to be square by a circle; carrying out plasma cutting on the pushed workpiece; performing fifth heating treatment on the workpiece subjected to the plasma cutting; carrying out three times of extrusion on the workpiece subjected to the fifth heating treatment to obtain a forming die; quenching and tempering heating treatment are carried out on the forming die; and performing shot blasting treatment on the workpiece subjected to quenching and tempering heating treatment to obtain the integral drive axle forming workpiece. The invention can improve the product performance, reduce the production cost and improve the market competitiveness.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a flow chart of an automated method for forming an integral drive axle according to the present invention;
FIG. 2 is a flow chart of four heat treatments and four extrusion thickenings according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide an automatic method for forming an integral drive axle, which can improve the product performance, reduce the production cost and improve the market competitiveness.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
FIG. 1 is a flow chart of an automated method for forming an integral drive axle according to the present invention. As shown in fig. 1, an automated method for forming an integral drive axle includes:
step 101: carrying out primary sawing and blanking on the shaft tube by adopting a double-upright-column horizontal band sawing machine to obtain a blanked workpiece;
the material of the shaft tube is 20Mn2, SAE1527, and the outer diameter of the shaft tube
The wall thickness is 9-25 mm, and the blanking length of a workpiece is 1200-3000 mm; the double-column horizontal band sawing machine has the storage function of long pipes (the length of the long pipes is about 9-12 meters), the long pipes are stored for 10 according to the phi 194 outer diameter, and the double-column horizontal band sawing machine of the sawing equipment has automatic operation functions of automatic sizing, clamping (clamping firmly), sawing, loosening, withdrawing and the like; automatic feeding (long pipe) sawing is realized, and the sawing scheme does not influence the whole production line when the sawing machine fails; the speed requirement of sawing a short pipe in 2 minutes is met; the sawing deflection amount is as follows: less than or equal to 1 mm; beat: 1.5 min/piece; the length size precision of the sawed workpiece is within +/-2 mm; the blanking length of the workpiece can be automatically adjusted; adaptation pipe diameter:
by adopting the JQHC chain tool line to cache products, the shaft bodies can be automatically put in and taken out of the warehouse, the first-in first-out is realized, the storage quantity is 30, and the warehouse management system can display the types and the quantity of the products in the warehouse
Step 102: marking a tracking steel code on the outer surface of the middle part of the blanked workpiece by using a pneumatic floating marking machine;
marking a tracking steel code on the outer surface of the middle part of the workpiece subjected to shaft tube blanking by using a pneumatic floating marking machine, wherein the tracking steel code has about 11 characters (combination of capital letters and numbers), the character is a Song style character, and the height, the width and the depth of the character are 9 multiplied by 8 multiplied by 0.3 mm; beat: 1.5 min/piece (speed adjustable to match production line beat); the marking machine has the functions of automatic lifting, coding, recording, data storage and data uploading so as to meet the requirement of automatic management.
Step 103: respectively carrying out four times of heat treatment and four times of extrusion thickening on two end parts of a shaft body of the workpiece with the tracking steel code; FIG. 2 is a flow chart of four heat treatments and four extrusion thickenings according to the present invention. As shown in fig. 2, step 103 specifically includes:
step 1031: carrying out first heat treatment on the middle part of the shaft body of the workpiece with the tracking steel code; the first heat treatment specifically comprises the following steps:
heating the middle part of the shaft body by adopting an intermediate frequency preheating furnace to 200-300 ℃, wherein the heating temperature can be adjusted and the temperature of the product can be monitored in real time;
a middle roller coating graphite machine is adopted to perform graphite roller coating on the middle section area of the shaft tube of the heated workpiece, the shaft body automatically performs axial centering and positioning, and the length position is adjustable; the lubricant is uniformly coated in the middle section area of the shaft tube, the adhesion is good, and the thickness can be automatically adjusted according to the requirement;
and (3) heating the middle part of the shaft body of the workpiece subjected to graphite roll coating by adopting intermediate frequency heating furnaces at two ends, wherein the heating temperature is up to 1100-1300 ℃, the heating temperature can be adjusted, and the temperature of the product can be monitored in real time.
Step 1032: carrying out primary extrusion thickening on the middle part of the shaft body of the workpiece subjected to primary heat treatment by adopting a horizontal double-head extruder; specifically, the method comprises the following steps:
automatically carrying out axial centering and positioning on the workpiece shaft body subjected to the first heat treatment by adopting a horizontal double-head extruder, namely extruding and thickening the middle part of the positioned shaft body even if the axis of a clamping tool of extruding equipment is superposed with the axis of the shaft body, and displaying and uploading extrusion pressure and time by the extruder;
performing extrusion thickening caching, and enabling the shaft bodies to be automatically put in and taken out of the bin by adopting a JYZH chain tooling line, so that first-in first-out is achieved, the storage quantity is 80, and the warehouse management system can display the types and the quantity of products in the bin; data transmitted by the warehouse management system needs to be made into a data file with a standard format according to the requirement of a buyer, so that the data file is convenient for total control and collection.
Step 1033: and carrying out second heat treatment on the two end parts of the shaft body of the workpiece thickened by the first extrusion, wherein the second heat treatment specifically comprises the following steps:
heating two end parts of a shaft body by adopting an intermediate frequency preheating furnace to 200-300 ℃; the heating temperature can be adjusted, and the product temperature can be monitored in real time;
performing graphite roll coating on the middle section area of the shaft tube of the heated workpiece by adopting a middle roll coating graphite machine; the shaft body automatically carries out axial centering positioning, and the length position is adjustable; the lubricant is uniformly coated in the middle section area of the shaft tube, the adhesion is good, and the thickness can be automatically adjusted according to the requirement;
heating the two end parts of the shaft body of the workpiece subjected to graphite roll coating by adopting intermediate frequency heating furnaces at the two ends, wherein the heating temperature is 1100-1300 ℃; the heating temperature can be adjusted, and the product temperature can be monitored in real time.
Step 1034: carrying out secondary extrusion thickening on the middle part of the shaft body of the workpiece subjected to secondary heat treatment by adopting a horizontal double-head extruder; the second extrusion thickening is the same as the first extrusion thickening.
Performing extrusion thickening 2 for caching, and enabling the shaft bodies to be automatically put in and taken out of a bin by adopting a JYZH chain tooling line, so that first-in first-out is realized, the storage quantity is 80, and the warehouse management system can display the types and the quantity of products in the bin; data transmitted by the warehouse management system needs to be made into a data file with a standard format according to the requirement of a buyer, so that the data file is convenient for total control and collection.
Step 1035: carrying out third heat treatment on the two end parts of the shaft body of the workpiece thickened by the second extrusion, wherein the third heat treatment is the same as the second heat treatment;
step 1036: carrying out third extrusion thickening on the middle part of the shaft body of the workpiece subjected to the third heat treatment by adopting a horizontal double-head extruder, wherein the third extrusion thickening is the same as the first extrusion thickening in operation;
step 1037: carrying out fourth heat treatment on the two end parts of the shaft body of the workpiece extruded and thickened for the third time by adopting an intermediate frequency heating furnace; specifically, the two ends of the shaft body are heated by adopting the intermediate frequency heating furnaces at the two ends, the heating temperature can be adjusted to 1100-1300 ℃, and the product temperature can be monitored in real time.
Step 1038: and performing fourth extrusion thickening on the middle part of the shaft body of the workpiece subjected to fourth heat treatment by using a horizontal double-head extruder, wherein the fourth extrusion thickening is the same as the first extrusion thickening in operation.
Step 104: performing secondary saw cutting on the workpiece subjected to the four-time heat treatment and the four-time extrusion thickening by adopting a two-end double-upright-column horizontal band sawing machine;
a horizontal band sawing machine with double upright posts at two ends is adopted to meet the speed requirement of sawing out a shaft tube in 2 minutes; the sawing deflection amount is as follows: less than or equal to 1 mm; beat: 1.5 min/piece; the length size precision of the sawed workpiece is within +/-2 mm; the blanking length of the workpiece can be automatically adjusted; adaptation pipe diameter:
step 105: the axis body middle part to the work piece of sawing for the second time is pushed away the side by the circle, specifically includes:
adopting the side pushing machine to push the middle part of the shaft body by a circle, displaying and uploading extrusion pressure and time by the side pushing machine, wherein the side pushing machine has the functions of visual identification and turnover.
Step 106: carrying out plasma cutting on the pushed workpiece; the method specifically comprises the following steps:
adopt sea treasured plasma cutting machine to carry out the plasma cutting to the work piece after pushing away, plasma cutting machine has automatic centering function, can cut the fabrication hole of upper and lower face, can adapt to the central siphon external diameter
The wall thickness is 9-25 mm, the blanking length of a workpiece is 1200-3000 mm, and the size and the position of a fabrication hole can be adjusted.
Step 107: performing fifth heating treatment on the workpiece subjected to the plasma cutting; the middle part of the shaft body is heated by adopting an intermediate frequency heating furnace to 1100-1300 ℃, the heating temperature can be adjusted, and the product temperature can be monitored in real time.
Step 108: carrying out three times of extrusion on the workpiece subjected to the fifth heating treatment to obtain a forming die; the method specifically comprises the following steps:
axially centering and positioning the workpiece subjected to the fifth heating treatment by adopting a 250T press, and carrying out extrusion forming on the centered and positioned middle process hole part of the shaft body to obtain a first forming die;
axially centering and positioning the first forming die by adopting a 400T press, and carrying out extrusion forming on the centered and positioned middle process hole part of the shaft body to obtain a second forming die;
axially centering and positioning the second forming die by adopting an 800T press, and carrying out extrusion forming on the centered and positioned middle process hole part of the shaft body to obtain a forming die;
molding and caching are carried out, the shaft bodies can be automatically put in and taken out of the warehouse by adopting a CXHC chain tooling line, first-in first-out is achieved, the storage quantity is 480, and the warehouse management system can display the types and the quantity of products in the warehouse; data transmitted by the warehouse management system needs to be made into a data file with a standard format according to the requirement of a buyer, so that the data file is convenient for total control and collection.
Step 109: quenching and tempering heating treatment are carried out on the forming die; the method specifically comprises the following steps:
quenching and tempering heating treatment are carried out on the product by adopting stepping type quenching and tempering heat treatment equipment, and the requirement of 3min per piece of beat is met;
carrying out tempering and caching: by adopting a TZHC chain tooling line, the shafts can be automatically put into and taken out of the warehouse, so that the first-in first-out is realized, the storage quantity is 320, and the warehouse management system can display the types and the quantity of products in the warehouse; data transmitted by the warehouse management system needs to be made into a data file with a standard format according to the requirement of a buyer, so that the data file is convenient for total control and collection.
Step 110: performing shot blasting treatment on the workpiece subjected to quenching and tempering heating treatment to obtain an integral drive axle forming workpiece; the method specifically comprises the following steps:
and (3) spraying paint on the surface of the workpiece subjected to shot blasting by adopting a special paint spraying machine, wherein the paint spraying surface is uniform, the thickness is uniform, and the shot blasting pressure and the shot blasting speed are uploaded in real time.
The caching step in the steps refers to storing data in a data file of the control system, and the product caching is used for cooling of products and temporary storage when equipment fails, so that the work of the following equipment is not affected.
The automation line meets the following requirements:
the requirements of different product process routes and production plan adjustment are met, and cross-sequence transmission and feeding and discharging interfaces are arranged in each procedure.
Each line is provided with a central control room, the central control controls and monitors the whole equipment line, and the equipment monitoring and display screen at key stations is convenient for whole-line automatic control and later-stage production management.
The position of the tracking code is identified before the pushing, so that the tracking code is ensured to be right above the workpiece.
And a discharge manual inspection device and a waste removing device are arranged after thickening.
And a discharge manual inspection device and a waste material removing device are arranged behind the shaft head extruder.
A manual discharging inspection device and a waste material removing device are arranged behind the pushing part.
The basic structure and control of the automatic production line for forming the integral drive axle housing are as follows:
1. the line body is conveyed in a roller way mode, and workpieces are conveyed and positioned on a conveying line;
2. the cache line is conveyed by adopting a multi-layer equidistant conveying line, and the feeding and the discharging are carried out by adopting three-axis transplanting;
3. the material is discharged from a roller way, sprayed with graphite and then fed to the roller way, and is transported by adopting two-station transplanting;
4. conveying the medium-frequency graphite spraying extruder, the medium-frequency extruder and the extruder among four stations by adopting a four-station walking beam;
5. the extrusion equipment adopts discharging blanking equipment for blanking;
6. performing double-head two-station transplanting between a buffer blanking station, a sawing machine and a pushing station to perform blanking and loading;
7. carrying the middle section heat treatment by adopting cylinder biaxial transplanting;
8. the on-line waste material roller way comprises a length detection station, a temperature detection station and a corresponding waste material roller way.
Compared with the prior art, the method of the invention has the following advantages:
1. the automation and the intellectualization of the production process are realized;
2. the labor is saved, and the labor intensity of workers is reduced;
3. the logistics situation is improved, and the turnover waste is reduced;
4. the utilization rate of the production space is improved;
5. the utilization rate of the equipment is improved;
6. the personal safety in the production process is improved.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. An automated method for forming an integral drive axle, comprising:
carrying out primary sawing and blanking on the shaft tube by adopting a double-upright-column horizontal band sawing machine to obtain a blanked workpiece;
marking a tracking steel code on the outer surface of the middle part of the blanked workpiece by using a pneumatic floating marking machine;
respectively carrying out four times of heat treatment and four times of extrusion thickening on two end parts of a shaft body of the workpiece with the tracking steel code;
performing secondary saw cutting on the workpiece subjected to the four-time heat treatment and the four-time extrusion thickening by adopting a two-end double-upright-column horizontal band sawing machine;
pushing the middle part of the shaft body of the workpiece sawed for the second time to be square by a circle;
carrying out plasma cutting on the pushed workpiece;
performing fifth heating treatment on the workpiece subjected to the plasma cutting;
carrying out three times of extrusion on the workpiece subjected to the fifth heating treatment to obtain a forming die;
quenching and tempering heating treatment are carried out on the forming die;
and performing shot blasting treatment on the workpiece subjected to quenching and tempering heating treatment to obtain the integral drive axle forming workpiece.
2. The automated method for forming the integral drive axle according to claim 1, wherein the four times of heat treatment and the four times of extrusion thickening are respectively performed on two end parts of the axle body of the workpiece with the tracking steel code, and specifically comprises the following steps:
carrying out first heat treatment on the middle part of the shaft body of the workpiece with the tracking steel code;
carrying out primary extrusion thickening on the middle part of the shaft body of the workpiece subjected to primary heat treatment by adopting a horizontal double-head extruder;
carrying out secondary heat treatment on the two end parts of the shaft body of the workpiece which is extruded and thickened for the first time;
carrying out secondary extrusion thickening on the middle part of the shaft body of the workpiece subjected to secondary heat treatment by adopting a horizontal double-head extruder;
carrying out third heat treatment on the two end parts of the shaft body of the workpiece which is extruded and thickened for the second time;
carrying out third extrusion thickening on the middle part of the shaft body of the workpiece subjected to the third heat treatment by adopting a horizontal double-head extruder;
carrying out fourth heat treatment on the two end parts of the shaft body of the workpiece extruded and thickened for the third time by adopting an intermediate frequency heating furnace;
and (4) performing fourth extrusion thickening on the middle part of the shaft body of the workpiece subjected to the fourth heat treatment by adopting a horizontal double-head extruder.
3. The automated method for forming the integral drive axle according to claim 2, wherein the first heat treatment of the two end parts of the axle body of the workpiece with the steel code is performed, specifically comprising:
heating the middle part of the shaft body by adopting an intermediate frequency preheating furnace to 200-300 ℃;
performing graphite roll coating on the middle section area of the shaft tube of the heated workpiece by adopting a middle roll coating graphite machine;
and heating the middle part of the shaft body of the workpiece subjected to graphite roll coating by adopting intermediate frequency heating furnaces at two ends to reach the heating temperature of 1100-1300 ℃.
4. The automatic method for forming the integral drive axle according to claim 2, wherein the step of performing the first extrusion thickening on the middle part of the shaft body of the workpiece subjected to the first heat treatment by using a horizontal double-head extruder specifically comprises the following steps:
and (3) automatically carrying out axial centering and positioning on the workpiece shaft body subjected to the first heat treatment by adopting a horizontal double-head extruder, and extruding and thickening the middle part of the positioned shaft body.
5. The automated method for forming the integral drive axle according to claim 1, wherein the middle part of the shaft body of the workpiece subjected to the second sawing is pushed to the square by a circle, and the method specifically comprises the following steps:
and (4) pushing the middle part of the shaft body of the workpiece sawed for the second time by a square pushing machine in a circular manner, and displaying and uploading extrusion pressure and time in real time.
6. The automated method for forming an integral drive axle according to claim 1, wherein the plasma cutting of the pushed workpiece specifically comprises:
and carrying out plasma cutting on the pushed workpiece by adopting a plasma cutting machine.
7. The automated method for forming an integral drive axle according to claim 1, wherein the fifth heat treatment is performed on the workpiece after the plasma cutting, and specifically comprises:
and carrying out fifth heating treatment on the workpiece subjected to the plasma cutting by adopting an intermediate frequency heating furnace.
8. The automated method for forming an integral drive axle according to claim 1, wherein the step of performing three times of extrusion on the workpiece after the fifth heating treatment to obtain the forming die specifically comprises:
axially centering and positioning the workpiece subjected to the fifth heating treatment by adopting a 250T press, and carrying out extrusion forming on the centered and positioned middle process hole part of the shaft body to obtain a first forming die;
axially centering and positioning the first forming die by adopting a 400T press, and carrying out extrusion forming on the centered and positioned middle process hole part of the shaft body to obtain a second forming die;
and axially centering and positioning the second forming die by adopting an 800T press, and carrying out extrusion forming on the centered and positioned middle process hole part of the shaft body to obtain the forming die.
9. The automated method for forming the integral drive axle according to claim 1, wherein the quenching and tempering heat treatment of the forming die specifically comprises:
and quenching and tempering heating treatment is carried out on the forming die by adopting stepping type quenching and tempering heat treatment equipment, and extrusion pressure and time are displayed and uploaded in real time.
10. The automated method for forming the integral drive axle according to claim 1, wherein the shot blasting the workpiece subjected to the quenching and tempering heating treatment to obtain the integral drive axle formed workpiece specifically comprises:
shot blasting treatment is carried out on the inner surface and the outer surface of the workpiece subjected to quenching and tempering heating treatment by using a shot blasting machine, and shot blasting pressure and shot blasting speed are uploaded in real time.
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| Publication number | Priority date | Publication date | Assignee | Title |
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