CN213135923U

CN213135923U - Clamping tool for end face milling of Roots vacuum pump

Info

Publication number: CN213135923U
Application number: CN202022081754.8U
Authority: CN
Inventors: 周元博
Original assignee: Zibo Shuanghuan Vacuum Pump Factory
Current assignee: Zibo Shuanghuan Vacuum Pump Factory
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2021-05-07
Anticipated expiration: 2030-09-21

Abstract

The utility model relates to a roots vacuum pump face milling centre gripping frock, belong to roots vacuum pump processing's field, it includes the base of fixed connection in the workstation upper surface, the base deviates from workstation one side and rotates and be connected with and rotate the seat, it has the locating lever to rotate vertical sliding connection on the seat, two locating holes have been seted up on the base, two locating hole centre of a circle lines intersect and perpendicular with rotation seat axis of rotation, two locating hole centre of a circle lines are perpendicular with the boring and milling machine main axis, it deviates from base one side and rotates and be connected with two bearing seats to rotate the seat, the bearing seat shape is the cuboid, bearing seat upper surface is connected with two grip blocks along the equal synchronous reverse slip of bearing seat length direction, vertical sliding connection has the pressure strip on the rotation seat, terminal surface butt in two work piece up ends under the pressure strip, be provided with. This application has easy operation convenience, reduces workman intensity of labour's effect.

Description

Clamping tool for end face milling of Roots vacuum pump

Technical Field

The application relates to the field of roots vacuum pump processing, especially relates to a roots vacuum pump face milling centre gripping frock.

Background

The Roots vacuum pump is a variable-capacity vacuum pump which is internally provided with two blade-shaped rotors which synchronously rotate in opposite directions, and small gaps are arranged among the rotors and between the rotors and the inner wall of a pump shell so as not to be in contact with each other. The Roots vacuum pump is tested for long-term operation on devices such as petroleum, chemical engineering, plastics, pesticides, dynamic balance of a steam turbine rotor, aerospace space simulation and the like, and therefore, the Roots vacuum pump is expected to be widely popularized and applied in China. And can be widely used in petroleum, chemical, metallurgy, textile and other industries.

The utility model discloses a chinese utility model patent that the bulletin number is CN206215951U discloses a horizontal boring and milling machine of numerical control, it includes lathe bed and sliding seat of sliding connection on the lathe bed, the sliding seat includes vertical sliding connection in the lower sliding seat on the lathe bed, sliding seat on the horizontal sliding connection has, horizontal sliding connection has the workstation on the upper sliding seat, workstation sliding direction is perpendicular with upper sliding seat sliding direction, fixedly connected with stand on the lathe bed, vertical sliding connection has the headstock on the stand, be provided with the main shaft in the headstock, coaxial milling cutter that is provided with on the main shaft.

When a workpiece needs to be milled, the workpiece is placed on a workbench, the position of the workpiece is adjusted by a sliding seat, and a milling cutter is driven by a spindle box to rotate and approach the workpiece for milling.

In the related art, referring to fig. 1, the pump body end face part of the roots vacuum pump comprises a body 91, the body 91 is shaped like a cuboid, two first grooves 92 are formed in the lower end face of the body 91, second grooves 93 are formed in two side walls of the body 91 in the width direction, chamfers are formed in two ends of the upper end face of the body 91, and two mounting holes 94 are formed in the body 91 in the width direction.

Referring to fig. 2, a threaded positioning rod 95 is fixedly connected to the worktable, a butt rod 96 is vertically and slidably connected to the threaded positioning rod 95, a nut 97 is threadedly connected to the threaded rod 8 horizontally arranged in the length direction of the butt rod 96, two workpieces are placed on the worktable, two ends of the lower end surface of the butt rod 96 are respectively abutted against the upper end surfaces of the two workpieces, and the nut 97 is screwed so as to fix the workpieces on the worktable. When the milling of one surface of the workpiece close to the milling cutter is finished, the nut 97 is unscrewed, the exchanged end surface of the workpiece is screwed, the nut 97 is screwed, the milling is continued, and when the milling of the workpiece is finished, the operations are repeated for exchanging the positions of the two workpieces, so that the milling is carried out.

In view of the above-mentioned related art, the inventor believes that in the process of exchanging the end faces of the workpieces and exchanging the workpieces, the bolts need to be screwed repeatedly and the workpieces need to be carried by workers, which greatly increases the labor intensity of the workers.

SUMMERY OF THE UTILITY MODEL

In order to reduce workman intensity of labour, improve work efficiency, this application provides a roots vacuum pump face milling centre gripping frock.

The application provides a pair of roots vacuum pump face milling centre gripping frock adopts following technical scheme:

the utility model provides a roots vacuum pump facing cut centre gripping frock, includes the base of fixed connection in the workstation upper surface, the base deviates from workstation one side and rotates and be connected with and rotate the seat, it has the locating lever to rotate the seat last vertical sliding connection, two locating holes have been seted up on the base, two locating hole centre of a circle line intersects and perpendicular with rotation seat axis of rotation, two locating hole centre of a circle line is perpendicular with the boring and milling machine main axis, it deviates from base one side and rotates and be connected with two and bear the seat to rotate the seat, it is the cuboid to bear the seat shape, it has two grip blocks along bearing the equal synchronous reverse sliding connection of seat length direction to bear the seat upper surface, it has the pressure strip to rotate the seat last vertical sliding connection, terminal surface butt in two work piece upper end under the pressure strip, be provided with the drive on the.

By adopting the technical scheme, the two workpieces are respectively placed on the two bearing seats, the clamping block slides towards the direction close to the workpieces and is abutted against the side walls of the workpieces, the pressing plate slides towards the direction close to the bearing seats so as to press the two workpieces, the rotating seat rotates, and when the surface to be milled of one workpiece is vertical to the main axis of the boring and milling machine, the lower end of the positioning rod slides into the positioning hole so as to fix the rotating seat at the current position; after the milling cutter mills the workpiece towards one side of the milling cutter, the lower end of the positioning rod slides out of the positioning hole, the rotating seat rotates to enable the other workpiece to be close to the milling cutter, and when the surface to be milled of the other workpiece is perpendicular to the main axis of the boring and milling machine, the lower end of the positioning rod slides into the positioning hole, so that the rotating seat is fixed at the current position; after the milling cutter mills another workpiece towards one side of the milling cutter, the pressing plate rises and is not abutted to the two workpieces, the driving mechanism drives the two bearing seats to rotate simultaneously, after the two bearing seats rotate by 180 degrees, the pressing plate falls down to press the two workpieces, the operation is repeated to mill the unmapped surface of the workpiece, the operation is simple and convenient, and the labor intensity of workers is reduced.

Optionally, the rotating seat is fixedly connected with a rotating shaft towards one side of the base, the rotating shaft is rotatably connected onto the base, the rotating seat is rotatably connected with a plurality of balls towards one side of the base, and the balls are circumferentially arranged by taking the axis of the rotating shaft as the circle center.

Through adopting above-mentioned technical scheme, the pearl reduces and rotates the resistance that the seat rotated the in-process to it is more laborsaving to make to rotate the seat and rotate.

Optionally, the rotating seat deviates from two threaded rods of the vertical fixedly connected with of base one side, the two threaded rods are respectively located at two ends of the bearing seat in the length direction and located between two bearing seats, the pressing plate is vertically connected to the threaded rods in a sliding mode, the threaded rods are connected with nuts in a threaded mode, and the nuts are located on the pressing plate back from one side of the bearing seat.

By adopting the technical scheme, the lower end face of the pressing plate is abutted against the upper end face of the workpiece, and the nut is screwed to enable the pressing plate to be abutted against the workpiece, so that the stability of the workpiece on the bearing seat is effectively improved.

Optionally, a cylindrical first sliding groove is formed in the threaded rod along the axial direction of the threaded rod, and the positioning rod is connected to the first sliding groove in a sliding mode.

Through adopting above-mentioned technical scheme, first spout plays the guide effect to the locating lever slides.

Optionally, the first limit ring of the coaxial fixedly connected with of first spout inner wall, first limit ring internal diameter equals the locating lever diameter, the coaxial fixedly connected with second limit ring of locating lever periphery lateral wall, the second limit ring external diameter equals first spout internal diameter, and first limit ring is located the second limit ring top in vertical direction, coaxial cover is equipped with the spring on the locating lever, spring one end butt is towards second limit ring one side in first limit ring, spring other end butt is towards first limit ring one side in the second limit ring.

Through adopting above-mentioned technical scheme, after one of them work piece waited to mill the face and milled, the locating lever slided to keeping away from the base direction, and the locating lever lower extreme slides out in the locating hole, and the spring was compressed this moment, rotates the seat and rotates and make another work piece wait to mill the face towards milling cutter, loosens the locating lever, and the locating lever lower extreme gets into in the locating hole under the spring reset action, and easy operation is convenient.

Optionally, a second sliding groove is formed in the upper surface of the bearing seat along the length direction of the bearing seat, a sliding block is fixedly connected to the lower end face of the clamping block and is connected to the second sliding groove in a sliding mode, a bidirectional screw rod is connected to the bearing seat in a rotating mode, and the two sliding blocks are respectively in threaded connection with the positive and negative thread regions on the bidirectional screw rod.

Through adopting above-mentioned technical scheme, two sliders of two-way lead screw rotation drive grip block slide to being close to the work piece direction simultaneously, and the grip block supports tightly with the work piece lateral wall to effectively increase the stability of work piece on the plummer.

Optionally, one side of the clamping block, which faces the workpiece, is fixedly connected with a bump, and the bump abuts against the inner wall of the second groove.

Through adopting above-mentioned technical scheme, the lug butt in second recess lateral wall to effectively increase the connection stability between grip block and the work piece.

Optionally, the driving mechanism includes a driving shaft fixedly connected to the lower end surface of the bearing seat, the driving shaft is rotatably connected to the rotating seat, a worm wheel is coaxially and fixedly connected to the driving shaft, a worm is rotatably connected to the rotating seat, and the worm is engaged with the worm wheel.

Through adopting above-mentioned technical scheme, the worm rotates and drives the worm wheel and rotate to bear the seat rotation through the drive shaft drive, can lock the current position at the bearing seat when the worm stall, easy operation is convenient.

Optionally, the upper surface of the rotating seat is provided with lower scale marks, one side, away from the convex block, of the clamping block is provided with upper scale marks, and when the surface to be milled of the workpiece is perpendicular to the main axis of the milling cutter, the upper scale marks are aligned with the lower scale marks.

By adopting the technical scheme, the rotating angle of the bearing seat can be conveniently determined by utilizing the upper scale marks and the lower scale marks, and the processing precision is increased.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the two workpieces are respectively placed on the two bearing seats, the clamping block slides towards the direction close to the workpieces and is abutted against the side walls of the workpieces, the pressing plate slides towards the direction close to the bearing seats so as to press the two workpieces, the rotating seat rotates, and when the surface to be milled of one workpiece is perpendicular to the main axis of the boring and milling machine, the lower end of the positioning rod slides into the positioning hole so as to fix the rotating seat at the current position; after the milling cutter mills the workpiece towards one side of the milling cutter, the lower end of the positioning rod slides out of the positioning hole, the rotating seat rotates to enable the other workpiece to be close to the milling cutter, and when the surface to be milled of the other workpiece is perpendicular to the main axis of the boring and milling machine, the lower end of the positioning rod slides into the positioning hole, so that the rotating seat is fixed at the current position; after the milling cutter mills the other workpiece towards one side of the milling cutter, the pressing plate rises and is not abutted to the two workpieces, the driving mechanism drives the two bearing seats to rotate simultaneously, the pressing plate falls down to press the two workpieces after the two bearing seats rotate by 180 degrees, the operation is repeated to mill the non-milled surfaces of the workpieces, the operation is simple and convenient, and the labor intensity of workers is reduced;

2. when the surface to be milled of one workpiece is milled, the positioning rod slides towards the direction away from the base, the lower end of the positioning rod slides out of the positioning hole, the spring is compressed at the moment, the rotating seat rotates to enable the surface to be milled of the other workpiece to face the milling cutter, the positioning rod is loosened, and the lower end of the positioning rod enters the positioning hole under the reset action of the spring, so that the operation is simple and convenient;

3. the worm rotates and drives the worm wheel to rotate, thereby driving the bearing seat to rotate through the driving shaft, locking the bearing seat at the current position when the worm stops rotating, and being simple and convenient to operate.

Drawings

FIG. 1 is a schematic diagram of the related art;

fig. 2 is a schematic view of the overall structure of the related art;

FIG. 3 is a schematic view of the overall structure of the present embodiment;

FIG. 4 is an exploded view of the overall structure of the present embodiment;

FIG. 5 is a schematic sectional view of a part of the structure of the present embodiment;

FIG. 6 is a schematic sectional view of a part of the structure of the present embodiment;

fig. 7 is a schematic sectional view of a part of the structure of the present embodiment.

Description of reference numerals: 1. a base; 11. positioning holes; 12. a ring groove; 2. a rotating seat; 21. a rotating shaft; 22. a ball bearing; 3. positioning a rod; 31. a second stop collar; 32. a spring; 4. a bearing seat; 41. a second chute; 42. a bidirectional lead screw; 5. a clamping block; 51. a slider; 52. a bump; 6. a drive mechanism; 61. a drive shaft; 62. a worm gear; 63. a worm; 7. a compression plate; 8. a threaded rod; 81. a first chute; 82. a first limit ring; 83. a nut; 91. a body; 92. a first groove; 93. a second groove; 94. mounting holes; 95. a threaded positioning rod; 96. a butting rod; 97. and (4) a nut.

Detailed Description

The present application is described in further detail below with reference to figures 3-7.

The embodiment of the application discloses a clamping fixture for end face milling of a Roots vacuum pump. Referring to fig. 3 and 4, the clamping tool for milling the end face of the roots vacuum pump comprises a base 1 fixedly connected to the upper surface of a workbench, one side, away from the workbench, of the base 1 is rotatably connected with a rotating seat 2, a positioning rod 3 is vertically and slidably connected to the rotating seat 2, two positioning holes 11 are formed in the base 1, the circle center connecting line of the two positioning holes 11 is intersected and perpendicular to the rotating shaft 21 line of the rotating seat 2, the circle center connecting line of the two positioning holes 11 is perpendicular to the main axis of a boring and milling machine, and when the lower end of a positioning rod 3 slides into the positioning holes 11, the face of a workpiece; rotate seat 2 and deviate from base 1 one side and rotate and be connected with two and bear seat 4, bear 4 shapes of seat and be the cuboid, bear 4 upper surfaces of seat and have two grip blocks 5 along bearing 4 equal synchronous reverse sliding connection of length direction of seat, rotate seat 2 and go up vertical sliding connection and have pressure strip 7, pressure strip 7 lower terminal surface butt in two work piece up end, rotate and be provided with the drive on the seat 2 and bear 4 pivoted actuating mechanism 6.

Placing two workpieces on two bearing seats 4 respectively, enabling a clamping block 5 to slide towards the direction close to the workpieces and abut against the side walls of the workpieces, enabling a pressing plate 7 to slide towards the direction close to the bearing seats 4 so as to press the two workpieces tightly, enabling a rotating seat 2 to rotate, and enabling the lower end of a positioning rod 3 to slide into a positioning hole 11 when the surface to be milled of one workpiece is perpendicular to the main axis of the boring and milling machine, so that the rotating seat 2 is fixed at the current position; after the milling cutter mills the workpiece towards one side of the milling cutter, the lower end of the positioning rod 3 slides out of the positioning hole 11, the rotating seat 2 rotates to enable the other workpiece to be close to the milling cutter, and when the surface to be milled of the other workpiece is perpendicular to the main axis of the boring and milling machine, the lower end of the positioning rod 3 slides into the positioning hole 11, so that the rotating seat 2 is fixed at the current position; after the milling cutter mills another workpiece towards one side of the milling cutter, the pressing plate 7 rises and is not abutted to the two workpieces, the driving mechanism 6 drives the two bearing seats 4 to rotate simultaneously, after the two bearing seats 4 rotate by 180 degrees, the pressing plate 7 falls down to press the two workpieces, and the operation is repeated to mill the unmapped surfaces of the workpieces.

Referring to fig. 4, a rotating shaft 21 is fixedly connected to the side of the rotating base 2 facing the base 1, and the rotating shaft 21 is rotatably connected to the base 1. The rotating seat 2 is rotatably connected with six balls 22 towards one side of the base 1, the balls 22 are circumferentially arranged by taking the axis of the rotating shaft 21 as a circle center, a ring groove 12 is formed in one side of the base 1 towards the rotating seat 2, and the balls 22 are connected in the ring groove 12 in a rolling manner. The ball 22 reduces the resistance that rotates seat 2 and rotate the in-process to make and rotate seat 2 and rotate more laborsavingly, annular groove 12 rotates ball 22 and plays the guide effect, increases and decreases and rotates seat 2 rotational stability.

Referring to fig. 4, rotating seat 2 and deviating from two threaded rods 8 of the vertical fixedly connected with in base 1 one side, two threaded rods 8 are located respectively and bear 4 length direction both ends of seat and are located two and bear between the seat 4, and the vertical sliding connection of pressure strip 7 is on threaded rod 8, and threaded connection has nut 83 on threaded rod 8, and nut 83 is located pressure strip 7 and deviates from and bears 4 one side of seat, nut 83 periphery lateral wall fixedly connected with handle. After the lower end face of the compression plate 7 is abutted to the upper end face of the workpiece, the nut 83 is screwed to enable the compression plate 7 to be abutted to the workpiece, and therefore the stability of the workpiece on the bearing seat 4 is effectively improved.

Referring to fig. 5, a cylindrical first sliding groove 81 is axially formed in the threaded rod 8 along the threaded rod 8, the positioning rod 3 is slidably connected to the first sliding groove 81, a first limiting ring 82 is coaxially and fixedly connected to the inner wall of the first sliding groove 81, the inner diameter of the first limiting ring 82 is equal to the diameter of the positioning rod 3, a second limiting ring 31 is coaxially and fixedly connected to the outer peripheral side wall of the positioning rod 3, the outer diameter of the second limiting ring 31 is equal to the inner diameter of the first sliding groove 81, in the vertical direction, the first limiting ring 82 is located above the second limiting ring 31, the positioning rod 3 is coaxially sleeved with a spring 32, one end of the spring 32 abuts against the first limiting ring 82 towards one side of the second limiting ring 31, and the other end of the spring 32 abuts against the.

After one of the workpieces is milled to the surface to be milled, the positioning rod 3 slides in the direction away from the base 1, the lower end of the positioning rod 3 slides out of the positioning hole 11, the spring 32 is compressed at the moment, the rotating seat 2 rotates to enable the other workpiece to be milled to face the milling cutter, the positioning rod 3 is loosened, the lower end of the positioning rod 3 enters the positioning hole 11 under the reset action of the spring 32, and the operation is simple and convenient.

Referring to fig. 6, the second sliding groove 41 is formed in the upper surface of the bearing seat 4 along the length direction of the bearing seat 4, the lower end surface of the clamping block 5 is fixedly connected with a sliding block 51, the sliding block 51 is connected in the second sliding groove 41 in a sliding manner, the second sliding groove 41 is rotatably connected with a bidirectional screw rod 42, and the two sliding blocks 51 are respectively in threaded connection with the positive and negative threaded regions on the bidirectional screw rod 42.

The bidirectional screw 42 drives the two sliding blocks 51 to rotate to drive the clamping block 5 to slide towards the direction close to the workpiece, and the clamping block 5 is tightly abutted against the side wall of the workpiece, so that the stability of the workpiece on the bearing seat 4 is effectively improved.

Referring to fig. 6, a protrusion 52 is fixedly connected to the clamping block 5 toward the workpiece, and the protrusion 52 abuts against the inner wall of the second groove 93. The projection 52 abuts against the sidewall of the second groove 93, thereby effectively increasing the connection stability between the clamping block 5 and the workpiece.

Referring to fig. 6, the upper surface of the rotating base 2 is provided with lower scale lines, the side of the clamping block 5 away from the projection 52 is provided with upper scale lines, and when the surface to be milled of the workpiece is perpendicular to the main axis of the milling cutter, the upper scale lines are aligned with the lower scale lines. The rotation angle of the bearing seat 4 can be conveniently determined by utilizing the upper scale marks and the lower scale marks, and the processing precision is increased.

Referring to fig. 7, the driving mechanism 6 includes a driving shaft 61 fixedly connected to the lower end surface of the bearing seat 4, the driving shaft 61 is rotatably connected to the rotating seat 2, a worm wheel 62 is coaxially and fixedly connected to the driving shaft 61, a worm 63 is rotatably connected to the rotating seat 2, and the worm 63 is engaged with the worm wheel 62. The worm 63 rotates to drive the worm wheel 62 to rotate, so that the bearing seat 4 is driven to rotate through the driving shaft 61, the bearing seat 4 can be locked at the current position when the worm 63 stops rotating, and the operation is simple and convenient.

The implementation principle of the clamping tool for end face milling of the roots vacuum pump in the embodiment of the application is as follows: two workpieces are respectively placed on the two bearing seats 4, the two-way screw 42 rotates and drives the two sliding blocks 51 to drive the clamping block 5 to simultaneously slide towards the direction close to the workpieces, the clamping block 5 is tightly abutted against the side walls of the workpieces, and the convex block 52 is abutted against the inner wall of the second groove 93.

After the lower end face of the pressing plate 7 abuts against the upper end face of the workpiece, the nut 83 is screwed to enable the pressing plate 7 to abut against the workpiece. The rotating seat 2 rotates, and when the surface to be milled of one of the workpieces faces the milling cutter, the lower end of the positioning rod 3 slides into the positioning hole 11, so that the rotating seat 2 is fixed at the current position. After the milling cutter mills the workpiece towards one side of the milling cutter, the lower end of the positioning rod 3 slides out of the positioning hole 11, the spring 32 is compressed, the rotating seat 2 rotates to the other workpiece surface to be milled towards the milling cutter, and the milling cutter mills the surface.

After milling, the nut 83 is rotated, the pressing plate 7 is slid to enable the pressing plate 7 not to be abutted to a workpiece any more, the worm 63 is rotated, the worm 63 drives the worm wheel 62 to rotate, the worm wheel 62 rotates through the rotating shaft 21 and the bearing seat 4, the position of the bearing seat 4 is determined by observing the upper scale mark and the lower scale mark, after the bearing seat 4 rotates by 180 degrees, the lower end face of the pressing plate 7 is abutted to the upper end face of the workpiece, the nut 83 is screwed to enable the pressing plate 7 to be abutted to the workpiece, and the milling operation is repeated to mill the non-milled face of the workpiece.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a roots vacuum pump face milling centre gripping frock which characterized in that: the boring and milling machine comprises a base (1) fixedly connected to the upper surface of a workbench, wherein one side, deviating from the workbench, of the base (1) is rotatably connected with a rotating seat (2), a positioning rod (3) is vertically and slidably connected to the rotating seat (2), two positioning holes (11) are formed in the base (1), the circle center line of the two positioning holes (11) is intersected and perpendicular to the rotating shaft (21) line of the rotating seat (2), the circle center line of the two positioning holes (11) is perpendicular to the main axis of the boring and milling machine, one side, deviating from the base (1), of the rotating seat (2) is rotatably connected with two bearing seats (4), the bearing seats (4) are cuboid in shape, two clamping blocks (5) are synchronously and reversely slidably connected to the upper surface of each bearing seat (4) along the length direction of the corresponding bearing seat (4), and a pressing plate (7), the lower end face of the pressing plate (7) is abutted against the upper end faces of the two workpieces, and a driving mechanism (6) for driving the bearing seat (4) to rotate is arranged on the rotating seat (2).

2. The clamping tool for face milling of the Roots vacuum pump as claimed in claim 1, wherein: rotate seat (2) towards base (1) one side fixedly connected with axis of rotation (21), axis of rotation (21) are rotated and are connected on base (1), it is connected with many balls (22) to rotate seat (2) towards base (1) one side rotation, ball (22) use axis of rotation (21) axis to set up as centre of a circle circumference.

3. The clamping tool for face milling of the Roots vacuum pump as claimed in claim 2, wherein: rotate seat (2) and deviate from two threaded rods (8) of the vertical fixedly connected with in base (1) one side, two threaded rod (8) are located respectively and bear seat (4) length direction both ends and are located two and bear between seat (4), the vertical sliding connection of pressure strip (7) is on threaded rod (8), threaded connection has nut (83) on threaded rod (8), nut (83) are located pressure strip (7) and deviate from and bear seat (4) one side.

4. The clamping tool for face milling of the Roots vacuum pump as claimed in claim 3, wherein: cylindrical first spout (81) have been seted up along threaded rod (8) axial in threaded rod (8), locating lever (3) sliding connection is in first spout (81).

5. The clamping tool for face milling of the Roots vacuum pump as claimed in claim 4, wherein: first spout (81) inner wall coaxial fixedly connected with first spacing ring (82), first spacing ring (82) internal diameter equals locating lever (3) diameter, locating lever (3) periphery lateral wall coaxial fixedly connected with second spacing ring (31), second spacing ring (31) external diameter equals first spout (81) internal diameter, and first spacing ring (82) is located second spacing ring (31) top in vertical direction, coaxial cover is equipped with spring (32) on locating lever (3), spring (32) one end butt is in first spacing ring (82) towards second spacing ring (31) one side, spring (32) other end butt is in second spacing ring (31) towards first spacing ring (82) one side.

6. The clamping tool for face milling of the Roots vacuum pump as claimed in claim 5, wherein: bear seat (4) upper surface and seted up second spout (41) along bearing seat (4) length direction, terminal surface fixedly connected with slider (51) under grip block (5), slider (51) sliding connection is in second spout (41), bear seat (4) internal rotation and be connected with two-way lead screw (42), two slider (51) respectively with two-way screw thread district threaded connection on the two-way lead screw (42).

7. The clamping tool for face milling of the Roots vacuum pump as claimed in claim 6, wherein: one side, facing the workpiece, of the clamping block (5) is fixedly connected with a convex block (52), and the convex block (52) abuts against the inner wall of the second groove (93).

8. The clamping tool for face milling of the Roots vacuum pump as claimed in claim 7, wherein: actuating mechanism (6) are including drive shaft (61) of fixed connection terminal surface under bearing seat (4), drive shaft (61) are rotated and are connected on rotating seat (2), coaxial fixedly connected with worm wheel (62) on drive shaft (61), it is connected with worm (63) to rotate seat (2) internal rotation, worm (63) and worm wheel (62) meshing.

9. The clamping tool for face milling of the roots vacuum pump as claimed in claim 8, wherein: the upper surface of the rotating seat (2) is provided with lower scale marks, one side, away from the convex block (52), of the clamping block (5) is provided with upper scale marks, and when the surface to be milled of a workpiece is perpendicular to the main axis of the milling cutter, the upper scale marks are aligned with the lower scale marks.