CN111451813A

CN111451813A - Hydraulic clamp for machining automobile hub bracket

Info

Publication number: CN111451813A
Application number: CN201910054198.4A
Authority: CN
Inventors: 杨慧
Original assignee: Danyang Hao Cong New Materials Co ltd
Current assignee: Danyang Lansi Information Technology Co ltd
Priority date: 2019-01-21
Filing date: 2019-01-21
Publication date: 2020-07-28
Anticipated expiration: 2039-01-21
Also published as: CN111451813B

Abstract

The invention discloses a hydraulic clamp for machining an automobile hub bracket machine tool, and particularly relates to the technical field of automobile part machining. According to the invention, the adjustable pressing mechanism is driven by the plurality of hydraulic rotary oil cylinders arranged in a triangular shape to fix the end face of the hub bracket, the plurality of retractable clamping plates arranged in a triangular shape are used to fix the circumferential side wall of the hub bracket, and the adjustable positioning pins are matched, so that the stability of workpiece clamping can be greatly improved, and the applicability of a clamping tool can be improved.

Description

Hydraulic clamp for machining automobile hub bracket

Technical Field

The invention relates to the technical field of automobile part machining, in particular to a hydraulic clamp for machining an automobile hub bracket by a machine tool.

Background

The automobile is used as a complex mechanical device and is formed by closely matching thousands of parts, and a part of the parts are combined for transmission so that the automobile can smoothly and stably run, and the parts are collectively called as transmission parts; some parts and components play a role of supporting or strengthening, and such parts and components are collectively called as structural members. The automobile can stably and safely move for a long time, the transmission part and the structural part play a vital role, the hub bracket is one of many parts of the automobile and is used for mounting the hub of the automobile, and the mounting stability and reliability of the automobile tire are further ensured.

Patent application publication No. CN 208067838U's utility model discloses a wheel hub support processing clamping frock through being provided with reference column and locating pin on the base of wheel hub support processing frock, confirms the accurate position of waiting to process the wheel hub support through two point location, after the location, will wait to process on the wheel hub support firmly is fixed in the base with the three point fixation of first fixed subassembly, the fixed subassembly of second and the fixed subassembly of third to the completion is treated the clamping of processing the wheel hub support fixed, the utility model discloses simple structure, the clamping is convenient, reliable, and a clamping just can accomplish drilling processing, can improve machining efficiency greatly.

However, in actual use, the hub bracket clamping device still has more defects, such as the hub bracket can only be clamped in a specific size, and the clamping station cannot be turned over, so that the processing efficiency of the hub bracket is greatly reduced.

Disclosure of Invention

In order to overcome the defects in the prior art, the embodiment of the invention provides a hydraulic clamp for machining an automobile hub bracket, the adjustable pressing mechanism is driven by a plurality of hydraulic rotary oil cylinders which are arranged in a triangular shape to fix the end face of the hub bracket, the circumferential side wall of the hub bracket is fixed by a plurality of retractable clamping plates which are arranged in a triangular shape, and meanwhile, the adjustable positioning pins are matched, so that the stability of clamping a workpiece can be greatly improved, the applicability of a clamping tool can be improved, the turnover plate can be driven by a servo motor to turn over, the two processes of clamping and drilling can be synchronously carried out, the machining efficiency of the hub bracket is greatly improved, and the problems in the background technology are solved.

The hydraulic fixture comprises a rack, a shell is fixedly arranged at the top of the rack, a through groove is formed in the top of the shell in a penetrating manner, a turnover plate is arranged in the through groove in a matching manner, a servo motor is arranged at the top of one side of the shell, an output shaft of the servo motor horizontally penetrates through the through groove and the turnover plate in the through groove, the end part of an output shaft of the servo motor is movably connected with the inner side wall of the through groove far away from the servo motor side through a ball bearing, the turnover plate is fixedly sleeved on the output shaft of the servo motor, cavities are formed in the center positions of the top and the bottom of the turnover plate, pin holes are formed in the end surfaces of the two cavities, positioning pins are arranged in the pin holes in a matching manner, a supporting plate is fixedly sleeved outside the positioning pins, the top end surface of the supporting plate is coplanar with the end surface of the turnover plate on the side of the turnover plate, a hydraulic rotating cylinder is arranged outside the cavity, one end surface of a piston rod at the end part of the end of the hydraulic rotating cylinder is fixedly connected with a pressing mechanism, one end surface of the hydraulic rotating cylinder is provided with a guide groove, one end surface of a guide rod, a guide sleeve is fixedly connected with a guide rod, a guide rod is arranged on the end surface of a guide cylinder, a guide rod is fixedly connected with a guide rod, a guide rod is arranged on the end surface of a guide rod, a guide rod is arranged on the guide rod, a movable sleeve is arranged on the movable sleeve, a movable clamp plate, a movable clamp;

the pressing mechanism comprises a fixed plate, one end of the fixed plate is fixedly connected with a piston rod at the end part of the hydraulic rotary oil cylinder, one end of the fixed plate is provided with a groove, a movable plate is movably inserted in the groove, one end of the movable plate is equidistantly provided with a first locking hole in a penetrating mode, one end of the fixed plate with the groove is provided with a second locking hole in a penetrating mode, the first locking hole is matched with the second locking hole, a blind nut is correspondingly arranged at the position of the second locking hole in the bottom surface of the fixed plate, the fixed plate is fixedly connected with the movable plate through a locking screw, a pressing plate is fixedly connected to the bottom of one end of the fixed plate.

In a preferred embodiment, the pin hole circumference side inner wall internal thread, locating pin bottom circumference side outer wall correspondence is equipped with the external screw thread, threaded connection between locating pin and the pin hole, pin hole quantity is provided with four groups, and every group is equipped with a plurality ofly, and a plurality of pin hole collineation settings of every group, four groups the pin hole uses the central point of cavity to be annular evenly distributed on the terminal surface of cavity as the centre of a circle.

In a preferred embodiment, the number of the hydraulic rotary cylinders and the number of the guide grooves are three, the three hydraulic rotary cylinders and the three guide grooves are uniformly distributed on the outer side of the cavity in an annular shape by taking a central point of the cavity as a circle center, and the hydraulic rotary cylinders and the three guide grooves are alternately arranged.

In a preferred embodiment, the clamping plate comprises a vertical section and a circular arc section, and the top end of the circular arc section of the clamping plate is arranged in a flaring structure outwards.

In a preferred embodiment, the bottom end surface of the movable sleeve is provided as a spherical surface, and the circumferential side surfaces of the base plate and the fixed sleeve are provided as a net structure.

In a preferred embodiment, the bottom of the draft tube is provided with a collecting mechanism, the collecting mechanism comprises a collecting box, the top of the collecting box is provided with a cover plate in a matching manner, a communication port penetrates through the center of the top of the cover plate, the draft tube is communicated with the collecting box through the communication port in the center of the cover plate, and a plurality of air exhaust holes are uniformly distributed in the cover plate on two sides of the communication port.

In a preferred embodiment, the two sides of the top of the collecting box are both fixedly provided with an inserting rod, the two sides of the bottom of the cover plate are correspondingly provided with inserting grooves, the inserting rods are matched with the inserting grooves, and one ends of the inserting grooves are provided with flaring grooves.

In a preferred embodiment, the air inlet and the air outlet are both provided with a filter screen in a matching way.

The invention has the technical effects and advantages that:

1. the invention realizes that a hub bracket to be drilled is placed in a containing cavity formed between three clamping plates, and is pre-positioned through a positioning pin, then a hydraulic telescopic oil cylinder on one side where the hub bracket is placed is controlled to work through a P L C controller, so that a pressing mechanism connected with the end part of a piston rod is driven to rotate for a certain angle and is pressed downwards, the hub bracket moves downwards along the positioning pin and presses the clamping plates on the circumferential side outwards, in the process, a sleeve pipe can press a spring along the direction of a guide rod, when the bottom end surface of the hub bracket is attached to the top surface of an overturning plate on the side, the clamping plates can clamp the outer wall of the circumferential side of the hub bracket under the restoring force of the spring, after the hub bracket is clamped, a servo motor is controlled through a P L C controller to overturn the overturning plate for 180 degrees, so that one side of the overturning plate provided with a hub to be machined is overturned into the shell, then the side of the overturning plate provided with the hub bracket to be machined is controlled by a P L C controller to push the base plate to move upwards under the action of the overturning, because the fixed sleeve and the base plate is movably sleeved with the fixed in a movable sleeve, the movable sleeve, thereby pushing the base plate to push the base plate to move upwards, thereby pushing the base plate to move upwards, the base plate to be fixed in the movable sleeve, thereby pushing the movable sleeve to push the base plate to be fixed sleeve to be fixed in the movable sleeve, thereby pushing the movable sleeve to move, thereby pushing the movable sleeve to push the movable sleeve to move upwards, the movable sleeve to push the movable sleeve to move, the movable sleeve to push the fixed sleeve to move, the movable sleeve to push the fixed plate to push the movable sleeve to move upwards, the movable sleeve to push the fixed sleeve to move, the fixed sleeve to push the movable sleeve to move, the movable sleeve to push the fixed sleeve to move, the fixed sleeve to push the fixed plate, the fixed plate to push the fixed plate;

2. the invention collects the debris generated in the drilling process by utilizing the collecting mechanism, the top of the collecting box is provided with the cover plate in a matching way, the central position of the top of the cover plate is provided with the communicating port in a penetrating way, the guide cylinder is communicated with the collecting box through the communicating port at the central position of the cover plate, the cover plates at the two sides of the communicating port are uniformly distributed with the plurality of exhaust holes, the debris dust generated in the drilling process and dissipated in the shell is favorably absorbed into the collecting box by the exhaust fan, the debris dust can be prevented from dissipating into the external working environment, the debris dust can be recycled, the two sides of the top of the collecting box are both fixedly provided with the inserting rods, the two sides of the bottom of the cover plate are correspondingly provided with the inserting slots, the inserting rods are matched with the inserting slots, one end of each inserting slot is provided with the flaring slot, and the quick positioning, improve the stability of collecting box at the place in-process, and the setting in flaring groove, then be favorable to inserting the inserted bar into the slot fast, improve counterpoint efficiency, simultaneously, because the setting in air intake and the hole of airing exhaust, and the air intake all cooperates with the downthehole portion of airing exhaust and is equipped with the filter screen, both can keep the stability of the inside atmospheric pressure of casing, can prevent again that the piece loss that the drilling in-process produced from to outer environment, and then influence operation personnel's operational environment, the practicality is strong.

Drawings

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

FIG. 2 is a top view of the roll-over panel of the present invention;

FIG. 3 is a schematic view of the pressing mechanism of the present invention;

FIG. 4 is a schematic view of the collection mechanism of the present invention;

FIG. 5 is a schematic view of the cover plate structure of the present invention;

FIG. 6 is a circuit diagram of the control of the hydraulic rotary cylinder and the hydraulic cylinder of the present invention;

the reference numbers are 1 frame, 2 shell, 3 through groove, 4 turnover plate, 5 cavity, 6 locating pin, 7 support plate, 8 hydraulic rotary oil cylinder, 9 hold-down mechanism, 10 fixed plate, 11 movable plate, 12 pressing plate, 13 rubber cushion, 14 guide groove, 15 guide rod, 16 sleeve, 17 clamping plate, 18 reinforcing rod, 19 spring, 20 servo motor, 21 air inlet, 22P L C controller, 23 fixed sleeve, 24 hydraulic oil cylinder, 25 movable sleeve, 26 base plate, 27 driving motor, 28 drill bit, 29 guide cylinder, 30 exhaust fan, 31 collecting mechanism, 32 collecting box, 33 cover plate, 34 communicating port, 35 exhaust hole, 36 inserted rod, 37 slot, 38 flaring groove.

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.

Example 1

The invention provides a hydraulic clamp for machining an automobile hub bracket machine tool as shown in fig. 1-6, which comprises a frame 1, wherein a shell 2 is fixedly arranged at the top of the frame 1, a through groove 3 is arranged at the top of the shell 2 in a penetrating manner, a turning plate 4 is arranged inside the through groove 3 in a matching manner, a servo motor 20 is arranged at the top of one side of the shell 2, an output shaft of the servo motor 20 horizontally penetrates through the through groove 3 and the turning plate 4 therein, the end part of an output shaft of the servo motor 20 is movably connected with the inner side wall of the through groove 3 far away from the servo motor 20 through a ball bearing, the turning plate 4 is fixedly sleeved on the output shaft of the servo motor 20, cavities 5 are arranged at the top and bottom center positions of the turning plate 4, pin holes are arranged on the end surfaces of the two cavities 5, a positioning pin 6 is arranged inside the pin holes in a matching manner, a supporting plate 7 is fixedly sleeved on the outer side of the positioning pin 6, the top end surface of the supporting plate 7 is coplanar with the end surface of the turning plate 4 at the side far away from the end surface of the turning plate 4, a fixed end surface of the turning plate 14, a hydraulic cylinder 14 is provided with a guide rod 16, a guide rod 16 is arranged on the guide rod 16, a guide rod 16 fixed end surface of a guide rod 16 fixed sleeve, a guide rod fixed sleeve, a guide rod 16 fixed sleeve, a guide rod fixed sleeve 23 fixed sleeve, a guide rod fixed sleeve 23 fixed sleeve, a guide rod fixed sleeve, a guide rod fixed sleeve 23 fixed sleeve, a guide rod fixed sleeve, a guide rod fixed sleeve fixed;

the pressing mechanism 9 comprises a fixing plate 10, one end of the fixing plate 10 is fixedly connected with a piston rod at the end of the hydraulic rotary oil cylinder 8, a groove is formed in one end of the fixing plate 10, a movable plate 11 is movably inserted into the groove, a first locking hole is formed in one end of the movable plate 11 in an equidistant mode, a second locking hole is formed in one end, provided with a groove, of the fixing plate 10 in a penetrating mode, the first locking hole is matched with the second locking hole, a blind nut is correspondingly arranged at the position of the second locking hole in the bottom face of the fixing plate 10, the fixing plate 10 is fixedly connected with the movable plate 11 through a locking screw, a pressing plate 12 is fixedly connected to the bottom of one end of the fixing plate 10, and a.

According to the embodiment, the hub support to be drilled is placed in a containing cavity formed between three clamp plates 17 and is pre-positioned through a positioning pin 6, then the work of a hydraulic telescopic oil cylinder 8 placed on one side of the hub support is controlled through a P L C controller 22, the hydraulic telescopic oil cylinder 8 drives a pressing mechanism 9 connected with the end of a piston rod to rotate for a certain angle and press downwards, the hub support moves downwards along the positioning pin 6 and presses the clamp plates 17 on the circumferential side outwards, in the process, a sleeve 16 can press a spring 19 along the direction of a guide rod 15, when the bottom end face of the hub support is attached to the top face of an overturning plate 4 on the side, the clamp plate 17 can clamp the outer wall of the circumferential side of the hub support under the restoring force of the spring 19, after the hub support is clamped, the servo motor 20 is controlled through the P L C controller 22 to overturn the overturning plate 4, the overturning plate 4 is enabled to overturn into the shell 2, then the side provided with the overturning plate 4 to be processed, the overturning plate 4 is enabled to overturn into the shell 2, the other side of the overturning plate 4 provided with the overturning plate to be processed, then, the baseplate 4 to be processed, the baseplate 26 to be processed is controlled through the P L to push the hydraulic oil cylinder 24 to push the baseplate 26 to move upwards, the movable sleeve support 23 and the movable plate 23, the fixed to be connected with a fixed plate 23, the fixed in the fixed plate to be fixed in the working mechanism to be fixed, the rotating of the rotating, the rotating sleeve support, the rotating mechanism, the rotating of the rotating mechanism, the rotating of the rotating mechanism, the rotating mechanism, the rotating of the rotating mechanism, the rotating mechanism is improved efficiency of the rotating mechanism, the rotating mechanism.

Example 2

Further, the internal thread of pin hole circumference side inner wall, the corresponding external screw thread that is equipped with of 6 bottom circumference outside walls of locating pin, threaded connection between locating pin 6 and the pin hole is favorable to carrying out fast assembly and dismantlement to locating pin 6, and the change of being convenient for, maintenance cost is second, pin hole quantity is provided with four groups, and every group is equipped with a plurality ofly, and a plurality of pin hole collineation settings of every group, four groups the pin hole uses the central point of cavity 5 to be the centre of a circle and is annular evenly distributed on the terminal surface of cavity 5, is favorable to adjusting the position of locating pin 6 in cavity 5 according to the wheel hub support of actually treating processing, has improved the suitability of equipment greatly.

Further, the quantity of hydraulic pressure rotary cylinder 8 and guide way 14 all is provided with threely, three hydraulic pressure rotary cylinder 8 and guide way 14 all use the central point of cavity 5 as the centre of a circle to be annular evenly distributed in the outside of cavity 5, set up in turn between hydraulic pressure rotary cylinder 8 and the guide way 14, be favorable to improving the stability of wheel hub support when fixed greatly through triangular stability principle.

Further, splint 17 is including vertical section and circular arc section, splint 17's circular arc section top is outwards to be flaring structure setting, is convenient for block the wheel hub support in the appearance intracavity that forms between three splint 17.

Further, the bottom end face of the movable sleeve 25 is a spherical surface, and the circumferential side faces of the base plate 26 and the fixed sleeve 23 are both of a mesh structure, so that the heat dissipation effect of the driving motor 27 in the working process is improved, and the stable working of the equipment is ensured.

Further, draft tube 29 bottom is provided with collection mechanism 31, collection mechanism 31 is including collecting box 32, the cooperation of collecting box 32 top is equipped with apron 33, apron 33 top central point puts and runs through and is equipped with intercommunication mouth 34, be linked together through the intercommunication mouth 34 that apron 33 central point put between draft tube 29 and the collecting box 32, evenly distributed has a plurality of exhaust holes 35 on the apron 33 of intercommunication mouth 34 both sides, is favorable to inhaling the piece dust of the dissipation that produces in the drilling process in casing 2 inside to the collecting box 32 through exhaust fan 30, both can prevent during the piece dust loss from to external work environment, can realize the recovery of piece dust again and recycle.

Furthermore, the two sides of the top of the collection box 32 are both fixedly provided with the insertion rods 36, the two sides of the bottom of the cover plate 33 are correspondingly provided with the insertion slots 37, the insertion rods 36 are matched with the insertion slots 37, one end of each insertion slot 37 is provided with a flaring slot 38, so that the rapid positioning of the stations of the collection box 32 through the insertion rods 36 and the insertion slots 37 in a matching mode is facilitated, the stability of the collection box 32 in the placement process is improved, the arrangement of the flaring slots 38 is favorable for the rapid insertion of the insertion rods 36 into the insertion slots 37, and the alignment efficiency is improved.

Furthermore, the air inlet 21 and the air exhaust hole 35 are both provided with filter screens in a matched manner, so that chips generated in the drilling process can be prevented from dissipating to the external environment, and the working environment of operators is further influenced.

The working principle of the invention is as follows:

referring to the attached drawings 1-2 and fig. 6 of the specification, in the using process, firstly, the equipment is communicated with an external power supply, then, a worker places a hub bracket to be drilled into a containing cavity formed between three clamping plates 17, and performs pre-positioning through a positioning pin 6, then, a P L C controller 22 controls a hydraulic telescopic cylinder 8 at one side where the hub bracket is placed to work, so that the hydraulic telescopic cylinder 8 drives a pressing mechanism 9 connected with the end part of a piston rod to rotate for a certain angle and press downwards, so that the hub bracket moves downwards along the positioning pin 6 and presses outwards the clamping plate 17 at the circumferential side of the hub bracket, in the process, a sleeve 16 can press a spring 19 along the direction of a guide rod 15, when the bottom end face of the hub bracket is attached to the top face of an overturning plate 4 at the side, the clamping plate 17 clamps the circumferential side outer wall of the hub bracket under the restoring force of a spring 19, after the hub bracket is clamped, the hub bracket is controlled by a servo motor 20 to overturn a turnover plate 4 to enable the turnover plate 4 to overturn 180 degrees, so that one side of the turnover plate 4 where the hub bracket to be machined is installed is connected to the inside of a turnover plate 4, then, and the turnover plate 23 is controlled by a P3652C controller 22, so that the hub bracket 22, the hub bracket 23 controls a movable motor to drive a sleeve bracket to drive a heat dissipation motor to drive a sleeve bracket 23 to move along the top of a sleeve 23, thereby, the sleeve bracket 23, the sleeve bracket 23, the sleeve bracket to move continuously, the sleeve bracket 23, the sleeve 23 is arranged in the turnover bracket, the turnover bracket 23, the work process is stably drives the work, the;

referring to the attached drawing 3 of the specification, when the hydraulic rotary cylinder 8 is used for driving the pressing mechanism 9 to press the hub bracket to be processed, because one end of the movable plate 11 is provided with first locking holes in a penetrating manner at equal intervals, one end of the fixed plate 10 with the groove is provided with second locking holes in a penetrating manner, the first locking holes are matched with the second locking holes, blind nuts are correspondingly arranged at the second locking holes on the bottom surface of the fixed plate 10, and the fixed plate 10 is fixedly connected with the movable plate 11 through locking screws, the relative length between the fixed plate 10 and the movable plate 11 can be adjusted according to the size of the hub bracket to be processed, so that the applicability of the pressing mechanism 9 is greatly improved;

referring to the attached drawings 1 and 4-5 of the specification, in the process of collecting the debris generated in the drilling process, because the top of the collection box 32 is provided with the cover plate 33 in a matching manner, the central position of the top of the cover plate 33 is provided with the communication port 34 in a penetrating manner, the guide cylinder 29 is communicated with the collection box 32 through the communication port 34 at the central position of the cover plate 33, the cover plates 33 at the two sides of the communication port 34 are uniformly distributed with a plurality of exhaust holes 35, which is beneficial to sucking the debris dust generated in the drilling process and dissipated in the shell 2 into the collection box 32 through the exhaust fan 30, not only preventing the debris dust from dissipating into the external working environment, but also realizing the recycling of the debris dust, moreover, the two sides of the top of the collection box 32 are both fixedly provided with the inserted rods 36, the two sides of the bottom of the cover plate 33 are correspondingly provided with the slots 37, the inserted rods 36, be favorable to coming to fix a position the station of collecting box 32 fast through inserted bar 36 and slot 37 of cooperation formula, improve the stability of collecting box 32 at the place in-process, and flaring groove 38's setting, then be favorable to coming into slot 37 with inserted bar 36 fast, improve counterpoint efficiency, simultaneously, because air intake 21 and the setting of hole 35 of airing exhaust, and air intake 21 and the inside all cooperation in hole 35 of airing exhaust are equipped with the filter screen, both can keep the stability of 2 inside atmospheric pressures of casing, can prevent again that the piece that the drilling in-process produced from dissipating to the external environment, and then influence operation personnel's operational environment, therefore, the clothes hanger is strong in practicability.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," and "connected" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be a direct connection, and "upper," "lower," "left," and "right" are only used to indicate a relative positional relationship, and when the absolute position of the object to be described is changed, the relative positional relationship may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims

1. A hydraulic clamp for machining an automobile hub support machine tool comprises a rack (1), and is characterized in that a shell (2) is fixedly arranged at the top of the rack (1), a through groove (3) penetrates through the top of the shell (2), a turning plate (4) is arranged inside the through groove (3) in a matched manner, a servo motor (20) is arranged at the top of one side of the shell (2), an output shaft of the servo motor (20) horizontally penetrates through the through groove (3) and a turning plate (4) inside the through groove, the end part of an output shaft of the servo motor (20) is movably connected with the inner side wall of the through groove (3) far away from the side of the servo motor (20) through a ball bearing, the turning plate (4) is fixedly sleeved on the output shaft of the servo motor (20), cavities (5) are arranged at the top and bottom center positions of the turning plate (4), pin holes are arranged on the end surfaces of two cavities (5), positioning pins (6) are arranged inside the pin holes in matched with a positioning pin hole, a positioning pin (6), a supporting plate (7) is fixedly sleeved outside the positioning pin (6), a supporting plate (7) is arranged on the top end surface of the supporting plate (7), the top end surface of the supporting plate (7) and the top end surface of the supporting plate (7), a fixed hydraulic cylinder (7) of the supporting plate (7), a fixed hydraulic cylinder (7) of the fixed cylinder (7), a fixed cylinder (7) of the supporting cylinder (7), a fixed cylinder (7) of the fixed cylinder (7), a fixed cylinder (17), a movable cylinder (17), a guide rod (17), a guide cylinder (17), a guide rod (17) is connected with a guide rod (17), a guide cylinder (16) is connected with a guide rod (17), a guide rod (16) is connected with a guide rod (16), a guide rod (17), a guide rod (16) is arranged on the guide rod (17), a guide rod (16) is connected with a guide rod (17), a guide rod (;

hold-down mechanism (9) are including fixed plate (10), fixed plate (10) one end links to each other with the piston rod of hydraulic pressure rotary cylinder (8) tip is fixed, fixed plate (10) one end is provided with the recess, the inside activity of recess is pegged graft and is had fly leaf (11), fly leaf (11) one end is equidistant to run through and is equipped with first locking hole, the one end of fixed plate (10) upper band recess runs through and is equipped with second locking hole, first locking hole and second locking hole phase-match, the bottom surface second locking hole department correspondence of fixed plate (10) is equipped with blind nut, through locking screw fixed connection between fixed plate (10) and fly leaf (11), fixed plate (10) one end bottom fixedly connected with clamp plate (12), clamp plate (12) bottom cooperation is equipped with cushion (13).

2. The hydraulic clamp for machining the automobile hub bracket according to claim 1, characterized in that: the utility model discloses a hollow cavity, including locating pin (6), locating pin hole circumference side inner wall internal thread, locating pin (6) bottom circumference side outer wall correspondence is equipped with the external screw thread, threaded connection between locating pin (6) and the pin hole, pin hole quantity is provided with four groups, and every group is equipped with a plurality ofly, and a plurality of pin hole collineation settings of every group, four groups the pin hole uses the central point of cavity (5) to be annular evenly distributed on the terminal surface of cavity (5) as the centre of a circle.

3. The hydraulic clamp for machining the automobile hub bracket according to claim 1, characterized in that: the hydraulic rotary oil cylinder (8) and the guide groove (14) are three in number, the hydraulic rotary oil cylinder (8) and the guide groove (14) are uniformly distributed on the outer side of the cavity (5) in an annular mode by taking the central point of the cavity (5) as the circle center, and the hydraulic rotary oil cylinder (8) and the guide groove (14) are alternately arranged.

4. The hydraulic clamp for machining the automobile hub bracket according to claim 1, characterized in that: splint (17) are including vertical section and circular arc section, the circular arc section top of splint (17) outwards is flaring structure setting.

5. The hydraulic clamp for machining the automobile hub bracket according to claim 1, characterized in that: the bottom end face of the movable sleeve (25) is a spherical surface, and the circumferential side faces of the base plate (26) and the fixed sleeve (23) are both of a net structure.

6. The hydraulic clamp for machining the automobile hub bracket according to claim 1, characterized in that: the air guide cylinder is characterized in that a collecting mechanism (31) is arranged at the bottom of the air guide cylinder (29), the collecting mechanism (31) comprises a collecting box (32), a cover plate (33) is arranged at the top of the collecting box (32) in a matched mode, a communicating port (34) penetrates through the center of the top of the cover plate (33), the air guide cylinder (29) is communicated with the collecting box (32) through the communicating port (34) in the center of the cover plate (33), and a plurality of air exhaust holes (35) are uniformly distributed in the cover plate (33) on the two sides of the communicating port (34).

7. The hydraulic clamp for machining the automobile hub bracket according to claim 6, wherein the hydraulic clamp is characterized in that: the collecting box (32) top both sides all are fixed and are equipped with inserted bar (36), apron (33) bottom both sides correspond and are equipped with slot (37), inserted bar (36) and slot (37) phase-match, slot (37) one end is provided with flaring groove (38).

8. The hydraulic clamp for machining the automobile hub bracket according to claim 6, wherein the hydraulic clamp is characterized in that: the air inlet (21) and the air exhaust hole (35) are internally provided with filter screens in a matching way.