阅读说明：本技术 一种后轴总成轮毂轴端面双面锯铣机床 (Double-sided sawing and milling machine tool for hub shaft end face of rear shaft assembly ) 是由 施兆春 刘树青 卞荣 于 2021-08-18 设计创作，主要内容包括：本发明公开了一种后轴总成轮毂轴端面双面锯铣机床,包括床身,在床身的中部设置用于后轴总成夹紧的夹具,夹具通过夹具体固定在床身上,夹具体垂直于床身的其中一个侧面作为夹具安装面,在夹具安装面的两侧对称设有用于对后轴总成的轮毂轴端面同步进行加工的动力头部件,动力头部件的动作端设有刀具,在动力头部件的下方设有用于调整动力头部件的位置和角度的滑台组件；本发明通过滑台组件实现20度范围内任意角度端面的加工操作,可以根据需要准确调整车轮外倾角角度,机加工设备及工装夹具要具有互换性、通用性,通过一次装夹定位,完成加工,避免夹装造成的加工误差,满足了此类零件高效率、高精度的加工要求,适应大批量生产。(The invention discloses a double-sided sawing and milling machine tool for the end surface of a hub shaft of a rear shaft assembly, which comprises a machine body, wherein a clamp used for clamping the rear shaft assembly is arranged in the middle of the machine body, the clamp is fixed on the machine body through a clamp body, one side surface of the clamp body, which is vertical to the machine body, is used as a clamp mounting surface, power head parts used for synchronously processing the end surface of the hub shaft of the rear shaft assembly are symmetrically arranged on two sides of the clamp mounting surface, a cutter is arranged at the action end of the power head part, and a sliding table component used for adjusting the position and the angle of the power head part is arranged below the power head part; the machining operation of the end face with any angle within the range of 20 degrees is realized through the sliding table assembly, the camber angle of the wheel can be accurately adjusted according to the requirement, machining equipment and a tool clamp have interchangeability and universality, machining is completed through one-time clamping and positioning, machining errors caused by clamping are avoided, the high-efficiency and high-precision machining requirements of parts are met, and the machining device is suitable for mass production.)

1. A double-sided sawing and milling machine tool for the end face of a hub shaft of a rear shaft assembly is characterized by comprising a machine body (1), wherein a clamp (3) used for clamping the rear shaft assembly (2) is arranged in the middle of the machine body (1), the clamp (3) is fixed on the machine body through a clamp body (4), one side face, perpendicular to the machine body, of the clamp body (4) serves as a clamp mounting face (5), power head parts (6) used for synchronously processing the end face of the hub shaft of the rear shaft assembly are symmetrically arranged on two sides of the clamp mounting face (5), a cutter is arranged at the action end of each power head part (6), and a sliding table component used for adjusting the position and the angle of each power head part is arranged below each power head part (6);

anchor clamps (3) are including being used for rear axle assembly (2) to carry out the positioning clamping pre-positioning subassembly (7), pre-positioning pole (8), be used for first clamping part (9) that rear axle assembly (2) lower part presss from both sides tightly and be used for second clamping part (10) that rear axle assembly (2) upper portion pressed from both sides tightly, pre-positioning subassembly (7), pre-positioning pole (8), first clamping part (9) and second clamping part (10) all set up on anchor clamps installation face (5) symmetrically, at least one second clamping part (10) along being on a parallel with rear axle assembly length direction and anchor clamps body (4) sliding connection, it is provided with linear slide rail (11) to correspond on the anchor clamps body (4).

2. The double-sided sawing and milling machine tool for the end face of the hub shaft of the rear shaft assembly according to claim 1, wherein the second clamping part (10) comprises a supporting seat (12), a fixed connecting block (13) is fixed on the supporting seat (12), a push rod (14), a shifting rod (15) and a pull rod (16) are arranged on the fixed connecting block (13) in parallel along the clamping direction of the rear shaft assembly, one end of the push rod (14) is connected with a first oil cylinder (17) for driving the push rod to slide in the fixed connecting block (13), and the other end of the push rod (14) is connected with a positioning pin (18); two ends of a shifting lever (15) are respectively rotatably connected with the ejector rod (14) and the pull rod (16), the middle part of the shifting lever (15) is hinged with the fixed connecting block (13), and when the ejector rod (14) moves, the end part of the shifting lever (15) synchronously moves to drive the pull rod (16) to move along the direction opposite to the ejector rod (14); pull rod (16) set up clamp plate (20) deviating from the one end at first hydro-cylinder (17) place, clamp plate (20) are perpendicular with the axis direction of pull rod (16), screw and pull rod (16) fixed connection are passed through to clamp plate (20) one end, the other end is connected with connecting block (21) just to the ejector pin, be equipped with pressure head (22) on connecting block (21), be connected through first rotation axis (23) between pressure head (22) and connecting block (21), first rotation axis (23) set up along the axis direction of perpendicular to ejector pin (14), the tip through pressure head (22) cooperation fixed connection piece (13) carries out the clamp of rear axle assembly and unclamps, be equipped with between pressure head (22) and fixed connection piece (13) on supporting seat (12) and carry out prepositioned sloping block (24) when being used for the centre gripping of rear axle assembly.

3. The double-sided sawing and milling machine tool for the end face of the hub shaft of the rear axle assembly according to claim 2, wherein the fixed connecting block (13) is provided with a limit pin (25) in the direction perpendicular to the shaft body of the ejector rod (14) and the pull rod (16), the limit pin (25) is fixed on the fixed connecting block (13) through a limit seat (26), the ejector rod (14) and the pull rod (16) are respectively provided with a sliding groove (27) matched with the moving stroke, and the end part of the limit pin (25) is positioned in the sliding groove (27) to limit the rotation of the ejector rod (14) and the pull rod (16).

4. The double-sided sawing and milling machine tool for the end surface of the hub shaft of the rear axle assembly according to claim 2, characterized in that the end surface of the fixed connecting block (13) facing the pressure head (22) is provided with a limiting component, the limiting component comprises a movable ring (28) concentric with the ejector rod (14), a supporting block (29) and a first rotating pin (30), the supporting block (29) is fixed on the upper and lower parts of the movable ring (28), the movable ring (28) is movably connected with the supporting block (29) through the first rotating pin (30), the movable ring (28) is symmetrically provided with positioning blocks (31) on the end surface close to one side of the pressure head (22), an adjusting pad (32) for adjusting the end surfaces of the positioning blocks to be flush is arranged between the positioning blocks (31) and the end surface of the movable ring (28), and the rear axle assembly (2) is provided with positioning holes corresponding to the positioning pins (18) and the positioning blocks (31), when the rear axle assembly is clamped, the positioning pin (18) is pushed into the positioning hole by the ejector rod.

5. The double-sided sawing and milling machine tool for the end faces of the hub shafts of the rear axle assemblies according to claim 2, wherein the supporting seat (12) is square, the clamp body (4) is provided with L-shaped blocks (33) in the diagonal direction of the supporting seat (12), and gaskets are arranged between the L-shaped blocks (33) and the supporting seat (12).

6. The double-sided sawing and milling machine tool for the end faces of the hub shafts of the rear axle assemblies according to claim 1, wherein the first clamping part (9) comprises a fixing oil cylinder (45), a pressing component and a supporting and positioning component; the pressing assembly comprises a pressing arm (46), one end of the pressing arm (46) is rotatably connected with the driving end of the fixed oil cylinder through a connector (65), a clamping plate (47) used as a pressing arm rotating fulcrum is arranged at one end, close to the fixed oil cylinder, of the pressing arm (46), the clamping plate (47) is rotatably connected with the pressing arm (46), and a support (48) is arranged below the clamping plate (47); an adjusting screw rod (49) is arranged at one end, away from the fixed oil cylinder (45), of the pressure arm (46), the adjusting screw rod (49) is arranged in the direction perpendicular to the length direction of the pressure arm (46), and the adjusting screw rod (49) is rotated to adjust the compression height; the supporting and positioning assembly comprises a V-shaped block (50) and a V-shaped block support (51), the V-shaped block (50) is located under the adjusting screw rod (49) and fixed on the clamp body (4) through the V-shaped block support (51), the V-shaped block (50) is connected with the V-shaped block support (51) through a stud, the stud is rotated, and the positioning height of the V-shaped block (50) is adjusted.

7. The rear axle assembly hub axle end surface double-sided sawing and milling machine tool according to claim 1 is characterized in that the pre-positioning assembly (7) comprises a pre-positioning support (34), a pre-positioning block (35), a cushion block (36) and a positioning gasket (37), the pre-positioning block (35) is fixed on the fixture body (4) through the pre-positioning support (34), the cushion block (36) is located between the positioning gasket (37) and the pre-positioning block (35), and the height of the positioning gasket (37) is adjusted.

8. The double-sided sawing and milling machine tool for the end face of the hub shaft of the rear axle assembly according to claim 1, characterized in that the sliding table component comprises a first sliding table (38) which is rotatably connected with the machine body (1) and a second sliding table (39) which is fixed on the sliding table of the first sliding table (38) along the direction perpendicular to the first sliding table (38), and the power head component (6) is fixed on the sliding table of the second sliding table (39); a second rotating pin (40) is arranged at the bottom of the first sliding table (38), the first sliding table (38) rotates around the second rotating pin (40) in the horizontal direction, adjusting screws (41) are arranged on the outer sides of the two ends of the machine body (1) in the length direction of the first sliding table (28), and the rotating adjusting screws (41) are matched with the second rotating pin (40) to adjust the rotating angle; the lathe bed (1) is provided with a reference dial, a pointer is arranged on the reference dial, and the rotating angle is detected through the pointer.

9. The double-sided sawing and milling machine tool for the end surface of the hub shaft of the rear axle assembly according to claim 1 is characterized in that a movable plate (42) is arranged below a support seat of a second clamping part in sliding connection with the clamp body (4), the movable plate (42) and the clamp body (4) are in sliding connection through a linear slide rail (11), a detection component for detecting the sliding distance of the second clamping part is arranged on the machine tool body (1), the detection component comprises a detection head (43) located at the symmetry center of the clamp body, a contact pin (44) is arranged at one end, close to the detection head, of the movable plate (42), the contact pin (44) is in contact with the detection head (43), and the machine tool stops working.

Technical Field

The invention relates to the technical field of machining, in particular to a double-sided sawing and milling machine tool for the end face of a hub shaft of a rear axle assembly.

Background

A rear axle assembly hub axle end surface milling (sawing) machine tool is used for a rear axle assembly production line, after a rear axle assembly is accurately positioned on equipment, two end surfaces matched with a brake assembly are milled, and the length requirement, the wheel camber angle requirement and the toe-in angle requirement are ensured; the conventional rear axle assembly is processed in a mode of clamping and positioning for many times, repeated clamping operation is needed, a blank is adopted for positioning the rear axle assembly, the positioning error is large, the position degree of a processed hole is difficult to guarantee, the processing precision is low, the processing period of a single piece is long, and the efficiency is low.

Disclosure of Invention

The technical purpose is as follows: aiming at the defects that the existing rear axle assembly has long processing period and low efficiency and the processing precision is insufficient due to repeated clamping, the invention discloses a double-sided sawing and milling machine tool for the end surface of a hub axle of a rear axle assembly, which applies a double-sided processing technology, reduces the times of repeated installation and positioning, avoids repeated positioning errors and can finish processing with high precision and high efficiency.

The technical scheme is as follows: in order to achieve the technical purpose, the invention adopts the following technical scheme:

a double-sided sawing and milling machine tool for the end face of a hub shaft of a rear shaft assembly comprises a machine body, wherein a clamp used for clamping the rear shaft assembly is arranged in the middle of the machine body, the clamp is fixed on the machine body through a clamp body, one side face, perpendicular to the machine body, of the clamp body serves as a clamp mounting face, power head parts used for synchronously machining the end face of the hub shaft of the rear shaft assembly are symmetrically arranged on two sides of the clamp mounting face, a cutter is arranged at the action end of the power head part, and a sliding table component used for adjusting the position and the angle of the power head part is arranged below the power head part;

the fixture comprises a pre-positioning component, a pre-positioning rod, a first clamping component and a second clamping component, wherein the pre-positioning component is used for positioning and clamping the rear shaft assembly, the first clamping component is used for clamping the lower portion of the rear shaft assembly, the second clamping component is used for clamping the upper portion of the rear shaft assembly, the pre-positioning component, the pre-positioning rod, the first clamping component and the second clamping component are symmetrically arranged on a fixture mounting surface, at least one second clamping component is in sliding connection with the fixture body in the direction parallel to the length direction of the rear shaft assembly, and a linear slide rail is correspondingly arranged on the fixture body.

Preferably, the second clamping component comprises a supporting seat, a fixed connecting block is fixed on the supporting seat, a push rod, a deflector rod and a pull rod are arranged on the fixed connecting block in parallel along the clamping direction of the rear shaft assembly, one end of the push rod is connected with a first oil cylinder for driving the push rod to slide in the fixed connecting block, and the other end of the push rod is connected with a positioning pin; the two ends of the deflector rod are respectively rotatably connected with the ejector rod and the pull rod, the middle part of the deflector rod is hinged with the fixed connecting block, and when the ejector rod moves, the end part of the deflector rod synchronously moves to drive the pull rod to move along the direction opposite to the ejector rod; the pull rod sets up the clamp plate in the one end that deviates from first hydro-cylinder place, the clamp plate is perpendicular with the axis direction of pull rod, screw and pull rod fixed connection are passed through to clamp plate one end, the other end is connected with the connecting block just to the ejector pin, be equipped with the pressure head on the connecting block, connect through first rotation axis between pressure head and the connecting block, first rotation axis sets up along the axis direction of perpendicular to ejector pin, the tip through pressure head cooperation fixed connection piece carries out the clamp of rear axle assembly tightly with loosen, be equipped with the pre-positioning sloping block that carries out the pre-positioning when being used for rear axle assembly centre gripping on the supporting seat between pressure head and fixed connection piece.

Preferably, the fixed connecting block is provided with a limiting pin in the direction perpendicular to the rod body of the ejector rod and the pull rod, the limiting pin is fixed on the fixed connecting block through a limiting seat, sliding grooves matched with the moving stroke are formed in the ejector rod and the pull rod, and the end part of the limiting pin is positioned in the sliding grooves to limit the rotation of the ejector rod and the pull rod.

Preferably, the fixed connecting block is provided with a limiting component on the end surface facing the pressure head, the limiting component comprises a movable ring concentric with the push rod, a supporting block and a first rotating pin, the supporting block is fixed above and below the movable ring, the movable ring is movably connected with the supporting block through the first rotating pin, the movable ring is symmetrically provided with positioning blocks on the end surface close to one side of the pressure head, adjusting pads for adjusting the end surfaces of the positioning blocks to be parallel and level are arranged between the positioning blocks and the end surface of the movable ring, the rear shaft assembly is provided with positioning holes corresponding to the positioning pins and the positioning blocks, and when the rear shaft assembly is clamped, the positioning pins are pushed into the positioning holes by the push rod.

Preferably, the support seat is square, the clamp body is provided with an L-shaped block in the diagonal direction of the support seat, and a gasket is arranged between the L-shaped block and the support seat.

Preferably, the first clamping component comprises a fixing oil cylinder, a pressing assembly and a supporting and positioning assembly; the pressing assembly comprises a pressing arm, one end of the pressing arm is rotatably connected with the driving end of the fixed oil cylinder through a connector, a clamping plate used as a rotating fulcrum of the pressing arm is arranged at one end, close to the fixed oil cylinder, of the pressing arm, the clamping plate is rotatably connected with the pressing arm, and a support is arranged below the clamping plate; an adjusting screw is arranged at one end of the pressure arm, which is far away from the fixed oil cylinder, the adjusting screw is arranged along the direction vertical to the length direction of the pressure arm, and the adjusting screw is rotated to adjust the compression height; the supporting and positioning assembly comprises a V-shaped block and a V-shaped block support, the V-shaped block is located right below the adjusting screw and fixed on the clamp body through the V-shaped block support, the V-shaped block and the V-shaped block support are connected through a stud, the stud is rotated, and the positioning height of the V-shaped block is adjusted.

Preferably, the pre-positioning assembly comprises a pre-positioning support, a pre-positioning block, a cushion block and a positioning gasket, wherein the pre-positioning block is fixed on the fixture body through the pre-positioning support, the cushion block is located between the positioning gasket and the pre-positioning block, and the height of the positioning gasket is adjusted.

Preferably, the sliding table assembly comprises a first sliding table rotatably connected with the bed body, and a second sliding table fixed on a first sliding table saddle along a direction perpendicular to the first sliding table, and the power head part is fixed on a saddle of the second sliding table; a second rotating pin is arranged at the bottom of the first sliding table, the first sliding table rotates around the second rotating pin in the horizontal direction, adjusting screws are arranged on the outer sides of the two ends of the lathe bed in the length direction of the first sliding table, and the rotating adjusting screws are matched with the second rotating pin to adjust the rotating angle; the lathe bed is provided with a reference dial, a pointer is arranged on the reference dial, and the rotating angle is detected through the pointer.

Preferably, according to the invention, a movable plate is arranged below a second clamping part supporting seat which is in sliding connection with the clamp body, the movable plate and the clamp body are in sliding connection through a linear sliding rail, a detection assembly for detecting the sliding distance of the second clamping part is arranged on the machine tool body, the detection assembly comprises a detection head which is located at the symmetrical center of the clamp body, a contact pin is arranged at one end of the movable plate close to the detection head, the contact pin is in contact with the detection head, and the machine tool stops working.

Has the advantages that: the double-sided sawing and milling machine tool for the end face of the hub shaft of the rear shaft assembly provided by the invention has the following beneficial effects:

1. according to the invention, the sliding table assembly for adjusting the position and the angle of the power head part is arranged below the power head part, and the first sliding table can be controlled to rotate around the rotating pin by an angle set at will within a range of 20 degrees by matching with the reference dial, so that the requirement of adjusting the machining angle of the end surface of the rear shaft assembly can be met, the applicability of the device is improved, the operation flow is simplified, the machining operation difficulty is reduced, and the production efficiency is improved.

2. The pre-positioning rod can be adjusted according to the shape of the rear shaft assembly, the second clamping component adopts at least one sliding connection mode, can be adjusted according to the size of the rear shaft assembly, can contain deviation, and is matched with a sensor to detect the position of a workpiece and control allowance.

3. The second clamping component is pre-positioned through the pre-positioning inclined block, then the first oil cylinder drives the ejector rod and the pull rod to move in opposite directions, when the rear shaft assembly is clamped, the positioning of the pre-positioning inclined block is converted into positioning pin positioning, and the positioning pin is matched with the positioning hole in the rear shaft assembly to realize accurate fixing without being influenced by errors of a blank; meanwhile, the positioning and clamping are synchronously performed through the ejector rods and the pull rods which move oppositely, the structure of the fixture tool is simplified, and the operation is convenient.

4. The fixed connecting block is correspondingly provided with the limiting pins at the positions of the ejector rod and the pull rod along the direction vertical to the axis of the ejector rod, the rotation of the rod body is limited by the limiting pins, and the positioning pin at the end part of the ejector rod adopts the design that the section is triangular, so that the rear shaft assembly is prevented from moving, and the fixed connecting block is firmly fixed.

5. According to the invention, the pre-positioning assembly is arranged along the length direction of the rear shaft assembly, and the cushion block is arranged between the positioning gasket and the pre-positioning block, so that the positioning height can be adjusted.

6. According to the invention, the detection assembly is arranged on the clamp body, and the contact pin is contacted with the detection head through the detection head positioned at the center of the clamp body and the contact pin on the movable plate, so that the workpiece is out of tolerance and does not meet the machining requirement, and the machine tool stops working.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.

FIG. 1 is a front view of the overall structure of the present invention;

FIG. 2 is a top view of the overall structure of the present invention;

FIG. 3 is a left side view of the overall structure of the present invention;

FIG. 4 is a front view of the clamp of the present invention;

FIG. 5 is a left side view of the clamp of the present invention;

FIG. 6 is a perspective view of a first clamping member of the present invention;

FIG. 7 is a horizontal cross-sectional view of a first clamping member of the present invention;

FIG. 8 is a cross-sectional view taken along line A-A of FIG. 4;

the device comprises a lathe bed 1, a rear shaft assembly 2, a clamp 3, a clamp body 4, a clamp mounting surface 5, a power head part 6, a pre-positioning component 7, a pre-positioning rod 8, a first clamping component 9, a second clamping component 10, a linear slide rail 11, a support seat 12, a fixed connection block 13, a top rod 14, a driving rod 15, a pull rod 16, a first oil cylinder 17, a positioning pin 18, a pressing plate 20, a connection block 21, a pressure head 22, a first rotating shaft 23, a pre-positioning inclined block 24, a limit pin 25, a limit seat 26, a sliding groove 27, a movable ring 28, a support block 29, a first rotating pin 30, a positioning block 31, a positioning block, 32-adjusting pad, 33-L-shaped block, 34-prepositioning bracket, 35-prepositioning block, 36-cushion block, 37-positioning gasket, 38-first sliding table, 39-second sliding table, 40-second rotating pin, 41-adjusting screw, 42-movable plate, 43-detecting head, 44-contact pin, 45-fixed oil cylinder, 46-pressing arm, 47-clamping plate, 48-support, 49-adjusting screw, 50-V-shaped block, 51-V-shaped block support, 52-chip remover, 53-chip collecting trolley, 54-hydraulic station, 55-pneumatic part, 56 lubricating part, 57-electric part, 58-waste box, 59-waste tank, 60-second rotating shaft, 61-fixed block, 62-rotating shaft fixing seat, 63-bushing, 64-feeler block and 65-connector.

Detailed Description

The present invention will be more clearly and completely described below by way of a preferred embodiment in conjunction with the accompanying drawings, without thereby limiting the scope of the invention to the described embodiment.

As shown in fig. 1, 2 and 3, the invention discloses a double-sided sawing and milling machine tool for the end surface of a hub shaft of a rear axle assembly, which comprises a machine body 1, wherein a clamp 3 for clamping the rear axle assembly 2 is arranged in the middle of the machine body 1, the clamp 3 is fixed on the machine body through a clamp body 4, one side surface of the clamp body 4, which is perpendicular to the machine body, is used as a clamp mounting surface 5, the clamp body provided by the invention takes a flat surface with a larger area as the clamp mounting surface, and a trapezoidal reinforcing support plate is arranged on the side deviating from the clamp mounting surface to fix the clamp body; power head parts 6 for synchronously processing the end faces of the hub shafts of the rear axle assemblies are symmetrically arranged on two sides of the clamp mounting surface 5, a cutter is arranged at the action end of each power head part 6, and a sliding table component for adjusting the position and the angle of each power head part is arranged below each power head part 6; the periphery of the lathe body is provided with a chip cleaner 52, a chip collecting trolley 53, a hydraulic station 54, a pneumatic component 55, a lubricating component 56, an electrical component 57, a waste material box 58, a waste material groove 59 and the like, wherein the hydraulic station 54, the pneumatic component 55, the lubricating component 56 and the electrical component 57 are used for providing power, cooling and carrying out intelligent processing control on corresponding equipment on the lathe; a waste chute 59 is provided obliquely below the tool, guiding the milled waste into a waste box 58; the chip cleaner 52 collects flying chips around the machine tool into the chip collecting trolley 53 for uniform treatment.

The sliding table assembly comprises a first sliding table 38 rotationally connected with the machine body 1, and a second sliding table 39 fixed on a sliding saddle of the first sliding table 38 along a direction perpendicular to the first sliding table 38, wherein a power head component 6 is fixed on the sliding saddle of the second sliding table 39; a second rotating pin 40 is arranged at the bottom of the first sliding table 38, the first sliding table 38 rotates around the second rotating pin 40 in the horizontal direction, adjusting screws 41 are arranged on the outer sides of the two ends of the machine body 1 in the length direction of the first sliding table 28, and the rotating adjusting screws 41 are matched with the second rotating pin 40 to adjust the rotating angle; the lathe body 1 is provided with a reference dial, a pointer is arranged on the reference dial, and the rotating angle is detected through the pointer.

As shown in fig. 4 and 5, the clamp 3 of the present invention includes a pre-positioning assembly 7 for positioning and clamping the rear axle assembly 2, a pre-positioning rod 8, a first clamping member 9 for clamping the lower portion of the rear axle assembly 2, and a second clamping member 10 for clamping the upper portion of the rear axle assembly 2, wherein the pre-positioning assembly 7, the pre-positioning rod 8, the first clamping member 9, and the second clamping member 10 are all symmetrically disposed on the clamp mounting surface 5, at least one second clamping member 10 is slidably connected to the clamp body 4 along a direction parallel to the length direction of the rear axle assembly, and the clamp body 4 is correspondingly provided with a linear slide rail 11; the pre-positioning rod 8 is installed below a pressing point of the first clamping component 9 in a threaded connection mode, a tool setting block 65 is arranged at a position, close to a power head component, of the clamp body, initial coordinates of the component of the power head before machining are confirmed through the tool setting block, automatic machining is conducted through the tool setting block in cooperation with a position sensor on a machine tool, and machining amount is controlled.

A movable plate 42 is arranged below a second clamping part supporting seat which is connected with the clamp body 4 in a sliding mode, the movable plate 42 is connected with the clamp body 4 in a sliding mode through a linear slide rail 11, a detection assembly for detecting the sliding distance of the second clamping part is arranged on the machine body 1, the detection assembly comprises a detection head 43 located at the symmetry center of the clamp body, a contact pin 44 is arranged at one end, close to the detection head, of the movable plate 42, the contact pin 44 is in contact with the detection head 43, and the machine tool stops working.

The structure of the second clamping component 10 is shown in fig. 5-7, and comprises a supporting seat 12, wherein the supporting seat 12 is square, an L-shaped block 33 is arranged in the diagonal direction of the supporting seat 12 of the clamp body 4, a gasket is arranged between the L-shaped block 33 and the supporting seat 12, the mounting position of the supporting seat is finely adjusted through the L-shaped block 33 and the gasket, and then the supporting seat is fixed with the lathe bed; a fixed connecting block 13 is fixed on the supporting seat 12, a top rod 14, a shifting rod 15 and a pull rod 16 are arranged on the fixed connecting block 13 in parallel along the clamping direction of the rear axle assembly, one end of the top rod 14 is connected with a first oil cylinder 17 for driving the top rod to slide in the fixed connecting block 13, and the other end of the top rod 14 is connected with a positioning pin 18; two ends of a shifting lever 15 are respectively rotatably connected with an ejector rod 14 and a pull rod 16, the end part of the shifting lever 15 can be provided with a middle spherical structure, the ejector rod 14 and the pull rod 16 are provided with rotating grooves matched with the end part of the shifting lever 15, the middle part of the shifting lever 15 is hinged with a fixed connecting block 13, and when the ejector rod 14 moves, the end part of the shifting lever 15 synchronously moves to drive the pull rod 16 to move along the direction opposite to that of the ejector rod 14; the one end that the pull rod 16 deviates from first hydro-cylinder 17 place sets up clamp plate 20, clamp plate 20 is perpendicular with the axis direction of pull rod 16, clamp plate 20 one end is passed through screw and pull rod 16 fixed connection, the other end is connected with just connecting block 21 to the ejector pin, be equipped with pressure head 22 on the connecting block 21, be connected through first rotation axis 23 between pressure head 22 and the connecting block 21, first rotation axis 23 sets up along the axis direction of perpendicular to ejector pin 14, carry out the clamp of rear axle assembly and loosen through the tip of pressure head 22 cooperation fixed connection piece 13, be equipped with on supporting seat 12 and carry out prepositioning sloping block 24 that prepositions when being used for rear axle assembly centre gripping between pressure head 22 and fixed connection piece 13, make the part of rear axle assembly be close to the tight punishment of first clamp part 9 through prepositioning sloping block 24 cooperation prepositioning pole 8, be convenient for follow-up to carry out accurate clamping and fix.

The middle part of driving lever 15 is passed through second rotation axis 60 and is rotated with fixed connection block 13 and be connected, set up fixed block 61 and the rotation axis fixing base 62 that is used for fixed second rotation axis 60 on the fixed connection block 13, fixed block 61 and rotation axis fixing base 62 are located the top and the below of second rotation axis 60 respectively, bushing 63 has been cup jointed in the outside of second rotation axis 60, be equipped with wear-resisting gasket at bushing 63's upper and lower both ends, lifting means's life.

The end face of the fixed connecting block 13, which is opposite to the pressure head 22, is provided with a limiting component, the limiting component comprises a movable ring 28, a supporting block 29 and a first rotating pin 30, the movable ring 28 is concentric with the ejector rod 14, the supporting block 29 is fixed above and below the movable ring 28, the movable ring 28 is movably connected with the supporting block 29 through the first rotating pin 30, the movable ring 28 is symmetrically provided with positioning blocks 31 on the end face close to one side of the pressure head 22, adjusting pads 32 for adjusting the end faces of the positioning blocks to be flush are arranged between the positioning blocks 31 and the end face of the movable ring 28, positioning holes corresponding to the positioning pins 18 and the positioning blocks 31 are arranged on the rear axle assembly 2, when the rear axle assembly is clamped, the positioning pins 18 are pushed into the positioning holes by the ejector rod, the external dimensions of the pre-positioning inclined blocks 24 are pre-positioned, the positioning is converted into the positioning of the positioning holes, the precision is higher, and the influence of blank dimension deviation is avoided.

The fixed connecting block 13 is provided with a limit pin 25 in the direction perpendicular to the rod body of the ejector rod 14 and the pull rod 16, the limit pin 25 is fixed on the fixed connecting block 13 through a limit seat 26, sliding grooves 27 matched with the moving stroke are formed in the ejector rod 14 and the pull rod 16, the end part of the limit pin 25 is located in the sliding grooves 27, the rotation of the ejector rod 14 and the pull rod 16 is limited, the fixation is firmer, the triangular cross section shape of the positioning pin 18 is matched, the rotation of a workpiece is limited, the positioning accuracy is guaranteed, and meanwhile the sliding of the ejector rod 14 and the pull rod 16 cannot be influenced.

As shown in fig. 4 and 5, the first clamping component 9 of the present invention comprises a fixing cylinder 45, a pressing assembly and a supporting and positioning assembly; the pressing assembly comprises a pressing arm 46, one end of the pressing arm 46 is rotatably connected with the driving end of the fixed oil cylinder through a connecting head 65, a clamping plate 47 used as a pressing arm rotating fulcrum is arranged at one end, close to the fixed oil cylinder, of the pressing arm 46, the clamping plate 47 is rotatably connected with the pressing arm 46, and a support 48 is arranged below the clamping plate 47; an adjusting screw 49 is arranged at one end of the pressure arm 46, which is far away from the fixed oil cylinder 45, the adjusting screw 49 is arranged along the direction vertical to the length direction of the pressure arm 46, and the adjusting screw 49 is rotated to adjust the compression height; the supporting and positioning assembly comprises a V-shaped block 50 and a V-shaped block support 51, the V-shaped block 50 is located under the adjusting screw 49 and fixed on the clamp body 4 through the V-shaped block support 51, the V-shaped block 50 is connected with the V-shaped block support 51 through a stud, the stud is rotated, the positioning height of the V-shaped block 50 is adjusted, and the first clamping part 9 can be flexibly adjusted according to the appearance of a workpiece.

The pre-positioning assembly 7 comprises a pre-positioning support 34, a pre-positioning block 35, a cushion block 36 and a positioning gasket 37, the pre-positioning block 35 is fixed on the fixture body 4 through the pre-positioning support 34, the cushion block 36 is located between the positioning gasket 37 and the pre-positioning block 35, the height of the positioning gasket 37 is adjusted, the supporting heights of the two sets of pre-positioning assemblies are consistent, and the workpiece is kept horizontal.

When the device is used, a second clamping component which cannot slide is marked as a main clamping component, a second clamping component which can slide is marked as an auxiliary clamping component, pre-positioning of a rear shaft assembly is firstly carried out through the pre-positioning component 7 and the pre-positioning rod 8, then the main clamping component clamps, the ejector rod 14 is pushed to move through the piston rod of the first oil cylinder 17, the ejector rod 14 drives the pull rod 16 to move in the opposite direction through the deflector rod 15, the pressing plate 20 drives the pressing head 22 to be close to the end part of the fixed connecting block 13, the positioning pin 18 extends out of the fixed connecting block 13 under the action of the ejector rod 14 and is matched with a positioning hole on the rear shaft assembly component above the pre-positioning inclined block 24 to be positioned by the positioning hole; with the continuous movement of the first oil cylinder 17, the pressure head 22 gradually approaches the limiting component, the end face of the rear axle assembly is clamped on the movable ring 28 and is pressed tightly by the matching of the positioning blocks on the movable ring 28, and the movable ring 28 can rotate around the first rotating pin 30 and is completely attached to the end face of the workpiece; then, the auxiliary clamping component is clamped according to the same steps, the movable plate 42 synchronously slides along the linear slide rail 11, and the position of the auxiliary clamping component is adjusted to meet the processing requirements of rear shaft assemblies with different lengths; then the two first clamping components 9 are clamped, the pressure arm 46 is pushed to rotate around the clamping plate 47 through the fixed oil cylinder 45, and the clamping is carried out by matching with the adjusting screw 49; the bottom is supported by a V-block 50 and clamped for machining the rear axle.

The position of a workpiece is detected through a sensor arranged on a machine tool, an adjusting screw 41 is rotated to enable a first sliding table 38 to rotate around a second rotating pin 40, a power head component 6 is adjusted to correspond to the machined end face of the workpiece, and then the position of the power head component is adjusted through the first sliding table 38 and a second sliding table 39 to machine the workpiece; and after the machining is finished, disassembling the workpiece and preparing for the next cycle.

The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.