阅读说明：本技术 汽车桥壳胀压成形专用液压机及其压制成形方法 (Special hydraulic press for bulging forming of automobile axle housing and pressing forming method thereof ) 是由 王连东 邓海玲 张家旗 梁晨 宋希亮 马雷 于 2019-11-05 设计创作，主要内容包括：本发明公开一种汽车桥壳胀压成形专用液压机及压制成形方法。所述液压机本体由上横梁、下横梁、四个立柱I、II、III、IV、四根垂直拉杆I、II、III、IV、四根横拉杆I、II、III、IV组成的封闭框架,用以平衡压制成形过程中垂直方向、水平方向高达3000T的变形力。本发明在压制成形过程中,主液压缸带动上模向下压制管坯中部,通过精确控制小型的左侧、右侧垂直液压缸的向下速度,进而控制左压头、右压头带动管坯端部向下运动,保证压制成形过程中管坯左右两端与中部不弯曲。本发明可提供高达3000T的变形力,可满足生产大型汽车桥壳一体成形的需要,并且结构优化,设备制造成本较低。(The invention discloses a special hydraulic machine for bulging forming of an automobile axle housing and a pressing forming method. The hydraulic press body is a closed frame consisting of an upper cross beam, a lower cross beam, four stand columns I, II, III and IV, four vertical pull rods I, II, III and IV and four transverse pull rods I, II, III and IV and is used for balancing deformation forces which are up to 3000T in the vertical direction and the horizontal direction in the pressing forming process. In the process of press forming, the main hydraulic cylinder drives the upper die to press the middle part of the tube blank downwards, and the left pressure head and the right pressure head are controlled to drive the end parts of the tube blank to move downwards by accurately controlling the downward speed of the small left-side and right-side vertical hydraulic cylinders, so that the left end, the right end and the middle part of the tube blank are not bent in the process of press forming. The invention can provide a deformation force of up to 3000T, can meet the requirement of producing the axle housing of a large automobile for integrated forming, and has optimized structure and lower equipment manufacturing cost.)

1. The utility model provides a special hydraulic press of car axle housing bulging forming, the hydraulic press includes hydraulic system, electrical system, turbocharging system, front side, rear side high pressure jack (26a, 26b) and press forming die, press forming die includes mould (28), lower mould (27), front mould (21), back mould (19), left pressure head (6), right pressure head (15), upper die base (22) and die holder (20), characterized by:

the lower cross beam (4) is of a convex box structure, the upper cross beam (10) is of an inverted convex box structure, the front end and the rear end of the left and right step surfaces (10a, 10b, 4a, 4b) of the lower cross beam (4) and the upper cross beam (10) are respectively supported by four upright posts I, II, III, IV (5a, 5b, 5c, 5d) to form a closed frame structure, and the upper cross beam (10) and the lower cross beam (4) are respectively connected by four vertical pull rods I, II, III, IV (11a, 11b, 11c, 11d) in the vertical direction to balance external force acting on the upper cross beam (10) and the lower cross beam (4) in the vertical direction when the hydraulic machine works; four transverse pull rods I, II, III and IV (13a, 13b, 13c and 13d) are respectively used for connecting the upper cross beam (10) and the lower cross beam (4) with the upper end parts and the lower end parts of four upright posts I, II, III and IV (5a, 5b, 5c and 5d) in the horizontal direction so as to balance the external force acting on the four upright posts I, II, III and IV (5a, 5b, 5c and 5d) in the left-right direction when the hydraulic machine works;

the main hydraulic cylinder (12) is installed on the upper cross beam (10) in an inverted mode, the lower end of a piston rod of the main hydraulic cylinder (12) is connected to the top surface of the main sliding block (9) through a flange, the main sliding block (9) is connected with the upper die base (22), and the main hydraulic cylinder (12) drives the upper die base (22) and the upper die (28) to move up and down in the vertical direction;

the left vertical slide block (8) is positioned between the two left upright posts I, II (5a, 5b), the right vertical slide block (14) is positioned between the two right upright posts III, IV (5c, 5d), and the left vertical slide block (8) can move up and down along the vertical direction between the two left upright posts I, II (5a, 5 b); the right vertical sliding block (14) can move up and down along the vertical direction between the two right upright posts III and IV (5c and 5d), and the bottom surfaces of the left vertical sliding block (8) and the right vertical sliding block (14) are respectively connected with piston rods of the left vertical hydraulic cylinder (25) and the right vertical hydraulic cylinder (17); the left vertical hydraulic cylinder (25) and the right vertical hydraulic cylinder (17) are small hydraulic cylinders, and the cylinder bottoms of the small hydraulic cylinders are respectively arranged in the middle of a left step surface (4a) and a right step surface (4b) of the lower cross beam (4);

the left vertical sliding block (8) and the right vertical sliding block (14) are both box-type structures, a left horizontal hydraulic cylinder (24) and a right horizontal hydraulic cylinder (16) are respectively installed in the middle of the inner side of the left vertical sliding block and the right vertical sliding block, and guide sleeves I, II, III and IV (29a, 29b, 29c and 29d), V, VI, VII and VIII (29e, 29f, 29g and 29h) are respectively arranged on the upper part and the lower part of the left vertical sliding block and the right vertical sliding block;

piston rods of the left horizontal hydraulic cylinder (24) and the right horizontal hydraulic cylinder (16) are respectively connected with the left horizontal sliding block (7) and the right horizontal sliding block (18) to drive the left pressure head (6) and the right pressure head (15) to move left and right in the horizontal direction; left guide rods I, II, III, IV (7a, 7b, 7c, 7d) and right guide rods V, VI, VII, VIII (18a, 18b, 18c, 18d) are respectively arranged at the upper part and the lower part of the left horizontal sliding block (7) and the right horizontal sliding block (18), and the left guide rods I, II, III, IV (7a, 7b, 7c, 7d) and the right guide rods V, VI, VII (18a, 18b, 18c, 18d) slide in guide sleeves I, II, III, IV (29a, 29b, 29c, 29d) and guide sleeves V, VI, VII, VIII (29e, 29f, 29g, 29h) arranged in the left vertical sliding block (8) and the right vertical sliding block (14);

the workbench (23) is arranged in the middle of the upper plane of the lower cross beam (4), and the upper plane of the workbench (23) is provided with the lower die base (20).

2. The hydraulic press special for bulging forming of the automobile axle housing as claimed in claim 1, wherein: the upper die base (22) is of an inverted U-shaped structure, an upper die (28) is installed on the lower plane of the base, the lower die base (20) is of a U-shaped structure, front-side and rear-side high-pressure jacks (26a and 26b) are installed on the inner side wall of the U-shaped structure, a lower die (27) is installed in the middle of the upper plane of the base, and a front die (21) and a rear die (19) are installed on the front side and the rear side of the lower die (27).

3. The hydraulic press special for bulging forming of the automobile axle housing as claimed in claim 1 or 2, wherein: the front and rear high-pressure jacks (26a, 26b) drive the front die (21) and the rear die (19) to press the preformed pipe blank (1) from the outer side to the inner side on the upper plane of the lower die holder (20).

4. The hydraulic press special for bulging forming of the automobile axle housing as claimed in claim 1, wherein: the supercharging system consists of a low-pressure supercharger, a high-pressure supercharger and a high-pressure relief valve.

5. A method for pressing an automobile axle housing by a hydraulic machine special for the bulging forming of the automobile axle housing is characterized by comprising the following steps: the press forming method comprises the following steps:

a. placing a preformed pipe blank (1) of an automobile axle housing in a cavity of a lower die (27), and accurately positioning the preformed pipe blank in the left-right direction and the front-rear direction;

b. the left and right horizontal hydraulic cylinders (24, 16) of the hydraulic press work, the left and right horizontal sliding blocks (7, 18) drive the left pressure head (6) and the right pressure head (15) to work in from outside to inside, and the left and right ends of the preformed pipe blank (1) are sealed;

c. the front and rear high-pressure jacks (26a, 26b) work to drive the front die (21) and the rear die (19) to press the preformed tube blank (1) from outside to inside until the inner planes of the left and right ends of the front die (21) and the rear die (19) contact the outer side surfaces of the left and right ends of the lower die (27);

d. a main hydraulic cylinder (12) of the hydraulic machine works, and drives an upper die holder (22) to move downwards through a main sliding block (9) until a cavity of an upper die (28) contacts the upper curved surface of the preformed tube blank (1), and the operation is stopped;

e. the low-pressure supercharger of the supercharging system charges liquid into the preformed pipe blank (1) through the left pressure head (6) until the pressure in the pipe blank reaches the pressure p ₀Stopping filling liquid when the pressure is 6-20 MPa;

f. the main hydraulic cylinder (12) of the hydraulic press works to drive the upper die (28) to rotate at a speed v ₁The preformed pipe blank (1) is pressed downwards, and simultaneously the left and right vertical hydraulic cylinders (25, 17) drive the left and right vertical slide blocks (8, 14) to rotate at a speed v ₂Moves downwards until the distance between the two end surfaces of the upper die (28) and the two end surfaces of the lower die (27) reaches b ₀When the pressing is stopped, the upper die (28) stops pressing, and the pressure p in the tube blank is kept in the pressing process ₀The change is not changed;

g. the high-pressure supercharger of the supercharging system charges liquid into the preformed pipe blank (1) through the right pressure head (15) until the pressure in the pipe blank reaches the pressure p ₁Stopping filling liquid when the pressure is 60-120 MPa;

h. a pressure relief valve of a pressurization system arranged on the right pressure head (15) works to unload high-pressure liquid in the formed pipe fitting;

i. the left and right horizontal hydraulic cylinders (24, 16) of the hydraulic press return, and the left pressure head (6) and the right pressure head (15) are separated from the end part of the tube blank;

j. a main hydraulic cylinder (12) of the hydraulic machine drives an upper die (22) to return;

k. the front side and the rear side high-pressure jacks (26a, 26b) return to drive the front die (21) and the rear die (19) to return;

l, the left and right vertical hydraulic cylinders (25, 17) drive the left and right vertical slide blocks (8, 14) to move upwards to drive the left pressure head (6) and the right pressure head (15) to return to the initial positions;

m. taking the piece and pouring the liquid in the formed pipe.

6. The method for forming the automobile axle housing by pressing the special hydraulic press for the bulging forming of the automobile axle housing as claimed in claim 5, wherein the method comprises the following steps: when the preformed pipe blank (1) is integrally pressed and formed, the main hydraulic cylinder (12) drives the upper die (28) to be at a speed v through the main sliding block (9) ₁The middle part of the preformed pipe blank (1) is pressed downwards, the left vertical hydraulic cylinder (25) and the right vertical hydraulic cylinder (17) drive the left pressure head (6) and the right pressure head (15) to rotate at a speed v through the left vertical sliding block (8) and the right vertical sliding block (14) ₂Moving downwards, velocity v ₂Velocity v to ₁Rational matching, v ₂＝(0.45～0.55)v ₁So as to ensure that the left and right ends and the middle part of the preformed pipe blank (1) are not bent in the press forming process.

Technical Field

The invention belongs to the technical field of automobile manufacturing, and particularly relates to a special hydraulic press for bulging forming of an automobile axle housing and a pressing forming method of the automobile axle housing.

Background

The automobile axle housing is one of main bearing components on the automobile, and the geometry is complicated, belongs to complicated shape pipe class spare: the two ends are round pipes, the middle part is a bridge package with a rear oil cover, and a square cross-section straight pipe is arranged between the round pipes at the two ends and the bridge package. The axle housing performance of the automobile directly affects the safety and reliability of the transportation vehicle, and has enough strength and rigidity, and the mass is required to be reduced as much as possible to improve the smoothness of the automobile in driving. At present, the automobile axle housing is mainly manufactured by adopting a casting and stamping welding method, the wall thickness of the cast axle housing is well distributed, but the product quality is high, and pollution is caused in the production. The stamping and welding axle housing is light in weight, but low in material utilization rate, long in welding line of a workpiece and easy to leak oil at the welding line. In order to thoroughly change the manufacturing method of the traditional automobile axle housing and eliminate various defects, the recently disclosed method for expanding and pressing the steel pipe of the automobile axle housing comprises the following steps: selecting a seamless steel pipe with a certain specification, reducing diameters of two ends of the seamless steel pipe, performing hydraulic bulging on the middle part of the seamless steel pipe to obtain a preformed pipe blank which is similar to a rotator, finally performing liquid filling and pressing forming to obtain an axle housing pipe fitting with a rear cover and an additional front cover, and cutting off the additional front cover to obtain an axle housing body. The axle housing manufactured by the bulging forming method has no welding line in integral forming, has lighter weight than a cast axle housing and has higher strength than a punching welding axle housing.

Chinese patent No. 201310019329.8 discloses an integral forming method of a seamless axle housing of a light and medium truck, which comprises selecting a seamless steel round tube, reducing the diameters of two ends in the early stage, performing two-time hydraulic bulging in the middle part, reducing the diameters of two ends in the later stage to obtain an axisymmetric or nearly axisymmetric axle housingSealing two ends of the preformed pipe blank by using a press forming die on a four-way hydraulic press, filling liquid into the preformed pipe blank, and integrally press-forming the preformed pipe blank from the upper direction, the lower direction, the front direction and the rear direction, wherein circular pipe parts with the outer diameters de at the two ends of the pipe blank are not deformed, and the inner outer diameters d are ₁Becomes h ₀×b ₀The rectangular pipe, the axle housing semi-manufactured goods that has hemispherical back oil cap and additional protecgulum is formed to the big little single drum in one side of middle part axis both sides, obtains the axle housing product (attached figure 1, attached figure 2, attached figure 3) behind the additional protecgulum of excision.

Chinese patent (201610308062.8) discloses a liquid-filled pressing forming die for axle housing pipe fittings of large and medium-sized automobiles, which mainly comprises an upper die, a lower die, a front die, a rear die, a left pressure head, a right pressure head, an upper die holder, a lower die holder, a left side template, a right side template, hydraulic cylinders I and II, liquid-filled high-pressure pipes, pressure relief high-pressure pipes, ejector rods, liquid collecting tanks I and II and the like, and discloses the structure of each component part of the die. The hydraulic pressing forming die for the axle housing pipe fitting of the large and medium-sized automobile is installed on a four-way hydraulic machine, an upper die is installed on an upper sliding block of the hydraulic machine through an upper die base, a lower die is installed on a lower sliding block of the hydraulic machine through a lower die base, and a left (right) pressing head is installed on a left (right) sliding block of the hydraulic machine through a left (right) side die plate. During press forming, the left slide block and the right slide block respectively drive a left pressure head and a right pressure head of the press forming die to perform center working from the left side and the right side to realize sealing of two ends of the tube blank; the upper slide block drives the upper die to press the tube blank from top to bottom, the lower slide block drives the lower die to press the tube blank from bottom to top, the upper slide block and the lower slide block are respectively driven by two sets of independent large hydraulic cylinders, and the working feed speed of the upper slide block and the lower slide block is required to be accurately controlled in the tube blank press forming process.

The automobile drive axle has large load capacity, the axle housing has large structural size, the weight of a single large axle housing exceeds 100kg, the pressing force required by the liquid-filling press forming of the preformed tube blank by adopting the bulging press forming process reaches more than 3000T, the pressing amount of the middle part of the tube blank is different from the pressing amount of the circular tubes at two ends in the press forming process of the preformed tube blank, and the axle housing pipe fitting cannot be formed due to the fact that left and right ends of the tube blank are bent easily to cause the left pressure head and the right pressure head to leak in a sealing mode when the. Regarding the special hydraulic press for bulging forming of the automobile axle housing, the four-way hydraulic press described in the Chinese patent (201610308062.8) is adopted, the upper slide block and the lower slide block are respectively driven by two independent hydraulic systems, two large hydraulic cylinders and matched components are needed, the equipment structure is complex, the manufacturing cost is high, and the work speed of the upper slide block and the lower slide block is difficult to accurately control in the process of pressing forming so as to ensure that the left end and the right end of a pipe blank are not bent. At present, no literature report of a special hydraulic machine for bulging forming of an automobile axle housing is found in engineering practice.

Disclosure of Invention

The invention provides a special hydraulic machine for bulging and forming an automobile axle housing and a method for pressing and forming the automobile axle housing, aiming at solving the problem that no special hydraulic machine for bulging and forming the automobile axle housing exists in the current engineering practice.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a special hydraulic press of automobile axle housing bulging forming, the hydraulic press includes hydraulic system, electrical system, turbocharging system, front side, rear side high pressure jack and press forming die, press forming die includes mould, lower mould, front mould, back mould, left pressure head, right pressure head, upper die base and die holder. The lower cross beam of the special hydraulic machine is of a convex box structure, the upper cross beam is of an inverted convex box structure, the front and rear ends of the left and right side step surfaces of the lower cross beam and the upper cross beam are respectively supported by four stand columns I, II, III and IV to form a closed frame structure, and the upper cross beam and the lower cross beam are respectively connected by four vertical pull rods I, II, III and IV in the vertical direction to balance external force acting on the upper cross beam and the lower cross beam in the vertical direction when the hydraulic machine works; the upper cross beam and the lower cross beam are connected with the upper end parts and the lower end parts of the four upright posts I, II, III and IV by four transverse pull rods I, II, III and IV respectively in the horizontal direction so as to balance the external force acting on the four upright posts I, II, III and IV in the left-right direction when the hydraulic machine works;

the main hydraulic cylinder is arranged on the upper cross beam in an inverted mode, the lower end of a piston rod of the main hydraulic cylinder is connected to the top surface of the main sliding block through a flange, the main sliding block is connected with the upper die base, and the upper die base and the upper die are driven by the main hydraulic cylinder to move up and down in the vertical direction;

the left vertical sliding block is positioned between the two upright posts I, II on the left side, the right vertical sliding block is positioned between the two upright posts III and IV on the right side, and the left vertical sliding block can move up and down along the vertical direction between the two upright posts I, II on the left side; the right vertical sliding block can move up and down along the vertical direction between the two right upright posts III and IV, and the bottom surfaces of the left vertical sliding block and the right vertical sliding block are respectively connected with piston rods of the left vertical hydraulic cylinder and the right vertical hydraulic cylinder; the left vertical hydraulic cylinder and the right vertical hydraulic cylinder are small hydraulic cylinders, and the cylinder bottoms of the left vertical hydraulic cylinder and the right vertical hydraulic cylinder are respectively arranged in the middle of the left step surface and the right step surface of the lower cross beam;

the left vertical sliding block and the right vertical sliding block are both of box type structures, a left horizontal hydraulic cylinder and a right horizontal hydraulic cylinder are respectively arranged in the middle of the inner side of the left vertical sliding block and the right vertical sliding block, and guide sleeves I, II, III, IV, V, VI, VII, VIII are respectively arranged on the upper part and the lower part of the left vertical sliding block and the right vertical sliding block;

piston rods of the left horizontal hydraulic cylinder and the right horizontal hydraulic cylinder are respectively connected with the left horizontal sliding block and the right horizontal sliding block to drive the left pressure head and the right pressure head to move left and right in the horizontal direction; the upper part and the lower part of the left horizontal sliding block and the right horizontal sliding block are respectively provided with a left guide rod I, a right guide rod II, a left guide rod III, a right guide rod IV and a right guide rod V, a right guide rod VI, a right guide rod VII, a right guide rod VIII, and the left guide rod I, the right guide rod II, the right guide rod V, the right guide rod VI, the left guide rod VII, the right guide rod VIII slide in guide sleeves I, II, III, IV and guide sleeves V, VI, VII, VIII arranged in the left vertical sliding block and the right vertical sliding block;

the workbench is arranged in the middle of the plane of the lower cross beam, and the upper plane of the workbench is provided with the lower die base.

The upper die base is of an inverted U-shaped structure, an upper die is mounted on the lower plane of the base, the lower die base is of a U-shaped structure, front-side and rear-side high-pressure jacks are mounted on the inner side wall of the U-shaped structure, a lower die is mounted in the middle of the upper plane of the base, and a front die and a rear die are mounted on the front side and the rear side of the lower die.

And the front side high-pressure jacks and the rear side high-pressure jacks drive the front die and the rear die to press the preformed pipe blank from the outer side to the inner side on the upper plane of the lower die holder.

The supercharging system consists of a low-pressure supercharger, a high-pressure supercharger and a high-pressure relief valve.

A press forming method of a special hydraulic press for bulging forming of an automobile axle housing comprises the following steps:

(1) placing a preformed pipe blank of the automobile axle housing in a lower die cavity, and accurately positioning the preformed pipe blank in the left-right direction and the front-back direction;

(2) the left and right horizontal hydraulic cylinders of the hydraulic press work, the left and right horizontal sliding blocks drive the left and right pressing heads to work from outside to inside, and the left and right end parts of the preformed pipe blank are sealed;

(3) the front side high-pressure jacks and the rear side high-pressure jacks work to drive the front die and the rear die to press the preformed pipe blank from outside to inside until the inner planes of the left and right ends of the front die and the rear die contact the outer sides of the left and right ends of the lower die;

(4) a main hydraulic cylinder of the hydraulic press works, and drives an upper die base to move downwards through a main sliding block until an upper die cavity contacts the upper side curved surface of the preformed pipe blank and stops;

(5) the low-pressure supercharger of the supercharging system charges liquid into the preformed pipe blank through the left pressure head until the pressure in the pipe blank reaches the pressure p ₀Stopping filling liquid when the pressure is 6-20 MPa;

(6) the main hydraulic cylinder of the hydraulic press works to drive the upper die to rotate at a speed v ₁Pressing the preformed pipe blank downwards, and simultaneously driving the left and right vertical slide blocks to rotate at a speed v by the left and right vertical hydraulic cylinders ₂Move downwards until the distance between the two end faces of the upper die and the lower die reaches b ₀When the pressure of the upper die is not increased, the upper die stops pressing, and the pressure p in the pipe blank is kept in the pressing process ₀The change is not changed;

(7) a high-pressure supercharger of the supercharging system charges liquid into the preformed pipe blank through the left pressure head until the pressure in the pipe blank reaches the pressure p ₁Stopping filling liquid when the pressure is 60-120 MPa;

(8) a pressurizing system pressure relief valve arranged on the right pressure head works to unload high-pressure liquid in the formed pipe fitting;

(9) the left and right horizontal hydraulic cylinders of the hydraulic press return, and the left pressure head and the right pressure head are separated from the end part of the tube blank;

(10) a main hydraulic cylinder of the hydraulic machine drives an upper die to return;

(11) the front side high-pressure jack and the rear side high-pressure jack return to drive a front die and a rear die to return;

(12) the left and right vertical hydraulic cylinders drive the left and right vertical sliding blocks to move upwards to drive the left and right pressing heads to return to the initial positions;

(13) and taking the part, and pouring the liquid in the formed pipe.

When the whole preformed pipe blank is pressed and formed, the main hydraulic cylinder drives the upper die to rotate at a speed v through the main sliding block ₁The middle part of the preformed pipe blank is pressed downwards, the left vertical hydraulic cylinder and the right vertical hydraulic cylinder drive the left pressure head and the right pressure head to rotate at a speed v through the left vertical sliding block and the right vertical sliding block ₂Moving downwards, velocity v ₂Velocity v to ₁Rational matching, v ₂＝(0.45～0.55)v ₁So as to ensure that the left and right ends and the middle part of the preformed pipe blank are not bent in the pressing forming process.

The invention has the beneficial effects that:

(1) the invention relates to a special hydraulic press for bulging forming of an automobile axle housing, which adopts a closed frame consisting of an upper cross beam, a lower cross beam, four upright posts, four vertical pull rods and four cross pull rods to balance deformation forces of up to 3000T in the vertical direction and the horizontal direction in a pressing forming process, only uses one large-sized main hydraulic cylinder to provide a pressing force in the vertical direction, and simultaneously has the advantages of optimized structure, lower production and manufacturing cost and the like.

(2) In the whole press forming process of the automobile axle housing pipe fitting, a large main hydraulic cylinder drives an upper die to move downwards at a constant speed to press the middle part of a pipe blank, and the downward speed of a small left side and right side vertical hydraulic cylinder is accurately controlled to further control a left pressure head and a right pressure head to drive the end part of the pipe blank to move downwards, so that the left end and the right end and the middle part of the pipe blank are not bent in the press forming process.

Drawings

FIG. 1 is a schematic view of an expansion-press formed automotive axle housing preform blank;

FIG. 2 is a front view of a press formed pipe fitting for an automotive axle housing formed by expansion and pressing;

FIG. 3 is a top view of a press formed pipe fitting for an automotive axle housing formed by bulging;

FIG. 4 is a front view of a hydraulic press body structure special for the bulging forming of an automobile axle housing;

FIG. 5 is a schematic view of a front view A of a structure of a hydraulic press body special for bulging forming of an automobile axle housing, which is a partial structural diagram;

FIG. 6 is a schematic view of a front view B of a structure of a hydraulic press body special for bulging forming of an automobile axle housing, which is a partial structural diagram;

FIG. 7 is a schematic view of a main body of a special hydraulic machine for bulging forming of an automobile axle housing, from the front view C to a partial structure.

In the attached drawings, 1, a preformed pipe blank, 2, an additional front cover of an automobile axle housing, 3, a rear cover of the automobile axle housing, 4, a lower cross beam, 4a, a left step surface of the lower cross beam, 4b, a right step surface of the lower cross beam, 5a, an upright I, 5b, an upright II, 5c, an upright III, 5d, an upright IV, 6, a left pressure head, 7, a left horizontal sliding block, 7a, a left guide rod I, 7b, a left guide rod II, 7c, a left guide rod III, 7d, a left vertical sliding block IV, 8, a main sliding block, 9, an upper cross beam, 10a left step surface of the upper cross beam, 10b, a right step surface of the upper cross beam, 11a vertical pull rod I, 11b, a vertical pull rod II, 11c, 11d, a vertical pull rod IV, 12, a main hydraulic cylinder, 13a, a horizontal pull rod I, 13b, 13c, horizontal pull rod III, 13d, 14, and vertical slide block IV, 15. the hydraulic press comprises a right press head, 16, a right horizontal hydraulic cylinder, 17, a right vertical hydraulic cylinder, 18, a right horizontal sliding block, 18a, a right guide rod I, 18b, a right guide rod II, 18c, a right guide rod III, 18d, a right guide rod IV, 19, a rear die, 20, a lower die holder, 21, a front die, 22, an upper die holder, 23, a workbench, 24, a left horizontal hydraulic cylinder, 25, a left vertical hydraulic cylinder, 26a front high-pressure jack, 26b, a rear high-pressure jack, 27, a lower die, 28, an upper die, 29a guide sleeve I, 29b, a guide sleeve II, 29c, a guide sleeve III, 29d, a guide sleeve IV, 29e, a guide sleeve V, 29f, a guide sleeve VI, 29g, a guide sleeve VII, 29h and a guide sleeve VIII.

Detailed Description