CN112828764B

CN112828764B - Floating self-centering clamp for valve sleeve honing

Info

Publication number: CN112828764B
Application number: CN202011595707.3A
Authority: CN
Inventors: 严伟
Original assignee: Wuxi Yingbei Precision Hydraulic Co ltd
Current assignee: Wuxi Yingbei Precision Hydraulic Co ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2022-05-03
Anticipated expiration: 2040-12-29
Also published as: CN112828764A

Abstract

The invention discloses a valve sleeve honing floating self-centering clamp which comprises a processing table, wherein a frame is fixedly connected to the back surface of the processing table, a lifting mechanism is arranged at the top of the frame, the lifting mechanism comprises a first stepping motor arranged at the top of the processing table, an output shaft of the first stepping motor is fixedly connected with a driving disc, a top plate is clamped at the top of the processing table, a threaded driving rod penetrates through the right side of the top of the frame, and the bottom end of the threaded driving rod penetrates through an inner cavity of the frame and is rotatably connected with the top of the top plate through a bearing. According to the invention, the supporting angle is adjusted through the arrangement of the positioning mechanism, then the valve sleeve is placed at the top of the movable ring, the valve sleeve is limited and clamped through the matching use of the clamping mechanism and the driving mechanism, and finally the inner wall of the valve sleeve is honed through the matching use of the lifting mechanism and the honing mechanism, so that the purposes of simple and convenient operation, convenience in adjustment, stable clamping and convenience in honing replacement can be achieved.

Description

Floating self-centering clamp for valve sleeve honing

Technical Field

The invention relates to the technical field of valve sleeve processing, in particular to a floating self-centering clamp for valve sleeve honing.

Background

The valve sleeve type blowoff valve is evolved from a gate valve, the purpose of opening and closing is realized by utilizing the rotation of a gear for ninety degrees to drive the valve rod to lift, the torque is small, the operation is simple and convenient, and the valve sleeve type blowoff valve is easy to realize quick opening and closing, has the advantages of simple structure, good sealing performance, small volume, light weight, less material consumption and small installation size, is particularly driven, and can realize the periodic blowdown of a high-pressure boiler with the blowdown valve pn less than or equal to 20mpa, and the blowdown can be realized simultaneously in five channels or in one channel.

Traditional valve class parts machining hole is for grinding processing, and when the part hole required than higher, need the honing, the honing need be from centering and floating structure, and current relevant processing equipment is in the use of reality, and the operation is comparatively loaded down with trivial details, is not convenient for adjust floating structure, and is relatively poor to the centre gripping effect of machined part, and efficiency is lower, is unfavorable for high-efficient production.

Based on the above, the invention provides a valve sleeve honing floating self-centering clamp, which is used for solving the problems.

Disclosure of Invention

The invention aims to provide a floating self-centering clamp for valve sleeve honing, which has the advantages of simplicity and convenience in operation, convenience in adjustment, stable clamping and convenience in honing replacement, and solves the problems that the existing related processing equipment is relatively complicated in operation, inconvenient in adjustment of a floating structure, poor in clamping effect on a machined part, low in efficiency and not beneficial to efficient production in the actual use process.

In order to achieve the purpose, the invention provides the following technical scheme: the valve sleeve honing floating self-centering clamp comprises a processing table, wherein a frame is fixedly connected to the back surface of the processing table, a lifting mechanism is arranged at the top of the frame, the lifting mechanism comprises a first stepping motor arranged at the top of the processing table, a driving disc is fixedly connected to an output shaft of the first stepping motor, a top plate is clamped at the top of the processing table, a threaded driving rod is arranged on the right side of the top of the frame in a penetrating manner, the bottom end of the threaded driving rod penetrates through an inner cavity of the frame and is rotatably connected with the top of the top plate through a bearing, a stress disc is fixedly connected to the top end of the threaded driving rod, a carriage is arranged in the inner cavity of the frame, a honing mechanism is arranged in the inner cavity of the frame and comprises a driving motor arranged in the inner cavity of the carriage, a connecting threaded sleeve is fixedly connected to the output shaft of the driving motor, and a honing head is arranged at the bottom of the connecting threaded sleeve, the top of the honing head is fixedly connected with a connecting stud which is in threaded connection with an inner cavity of the connecting swivel nut, the top of the honing head is provided with a protection mechanism, the bottom of the inner cavity of the processing table is provided with a driving mechanism, the driving mechanism comprises a second stepping motor arranged at the bottom of the inner cavity of the processing table, an output shaft of the second stepping motor is fixedly connected with a first bevel gear, the bottom of the inner cavity of the processing table is rotatably connected with a threaded column through a bearing, the surface of the threaded column is fixedly connected with a second bevel gear, the first bevel gear is meshed with the second bevel gear, the top of the top plate is fixedly connected with four side plates, the center of the top plate is fixedly connected with a base, the surface of the base is annularly and fixedly connected with four pins, one ends of the pins, far away from the base, are fixedly connected with the side plates, and the top of the top plate is provided with a positioning mechanism, the utility model discloses a clamping device for the screw thread post, including the locating mechanism, the inner wall of activity circle is seted up four regulation holes with pin looks adaptation including the cover and is established at the movable circle on base surface, four fixed blocks of surface ring shape fixedly connected with of activity circle, one side fixedly connected with nut of fixed block, the inner chamber threaded connection of nut has bolt one, the one end of bolt one run through the fixed block and with the surface contact of curb plate, the bottom of roof is provided with fixture, fixture is including four arm lock that are located the roof bottom, the rectangle spout with arm lock looks adaptation is seted up at the top of roof, the surperficial threaded connection of screw thread post has the screw thread sliding sleeve, the top of screw thread sliding sleeve is provided with four threaded sleeve, the bottom fixedly connected with limit slide of arm lock.

Preferably, the protection mechanism comprises a sliding barrel which is slidably connected to the surface of the connecting threaded sleeve, four clamping blocks are fixedly connected to the bottom of the sliding barrel in an annular mode, a fixed disk is fixedly connected to the bottom of the surface of the connecting stud, and a clamping groove matched with the clamping blocks is formed in the surface of the fixed disk.

Preferably, the top of the sliding barrel is welded with a spring, the spring is sleeved on the surface of the connecting threaded sleeve, and the top end of the spring is welded with the connecting threaded sleeve.

Preferably, both ends of the threaded sleeve are in threaded connection with threaded pull rods, the threaded pull rod positioned at the top is in rotary connection with the limiting slide block, and the threaded pull rod positioned at the bottom is in rotary connection with the threaded sliding sleeve.

Preferably, the adjusting hole is sleeved on the surface of the pin, and the aperture of the adjusting hole is larger than the diameter of the pin.

Preferably, the left side of the top plate top is fixedly connected with a guide rod, the top end of the guide rod is fixedly connected to the top of the frame inner cavity, and the guide rod is connected with the sliding frame in a sliding mode.

Preferably, a plurality of heat dissipation holes are formed in the two sides of the processing table.

Preferably, the surface of the connecting threaded sleeve is fixedly connected with a plurality of arc-shaped limiting strips in an annular mode, and the inner wall of the sliding barrel is provided with arc-shaped limiting grooves matched with the arc-shaped limiting strips.

Preferably, the front end and the rear end of two sides of the top plate are respectively provided with a second bolt in a penetrating mode, and the bottom end of the second bolt is in threaded connection with the top of the machining table.

Preferably, the bottom of roof fixedly connected with eight slide rails, two adjacent slide rails are located the both sides of rectangle spout bottom respectively, the limit chute with slide rail looks adaptation is all seted up to the both sides at limit slide top.

Compared with the prior art, the invention has the following beneficial effects:

according to the floating self-centering clamp for the valve sleeve honing, the supporting angle is adjusted through the arrangement of the positioning mechanism, then the valve sleeve is placed at the top of the movable ring, the valve sleeve is limited and clamped through the matched use of the clamping mechanism and the driving mechanism, and finally the inner wall of the valve sleeve is honed through the matched use of the lifting mechanism and the honing mechanism, so that the purposes of being simple and convenient to operate, convenient to adjust, stable in clamping and convenient to replace a workpiece for honing can be achieved.

Drawings

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

figure 2 is a perspective view of the lifting mechanism and honing mechanism of this invention;

FIG. 3 is an enlarged view of a portion of the point A in FIG. 2 according to the present invention;

FIG. 4 is a schematic perspective cross-sectional view of the top plate and clamping mechanism of the present invention;

FIG. 5 is a perspective view of the positioning mechanism of the present invention;

FIG. 6 is a perspective view of the table, drive mechanism and clamping mechanism of the present invention;

FIG. 7 is a schematic perspective cross-sectional view of the processing table, drive mechanism and clamping mechanism of the present invention;

fig. 8 is a perspective view of the clamping mechanism of the present invention.

In the figure: 1. a processing table; 2. a frame; 3. a lifting mechanism; 31. a first stepping motor; 32. a drive disc; 33. a threaded drive rod; 34. a force-bearing plate; 35. a carriage; 4. a honing mechanism; 41. a drive motor; 42. connecting a threaded sleeve; 43. honing head; 44. connecting a stud; 5. a protection mechanism; 51. a slide cylinder; 52. a clamping block; 53. fixing the disc; 54. a card slot; 55. a spring; 6. a top plate; 7. a drive mechanism; 71. a second stepping motor; 72. a first bevel gear; 73. a threaded post; 74. a second bevel gear; 8. a clamping mechanism; 81. clamping arms; 82. a rectangular chute; 83. a threaded sliding sleeve; 84. a threaded bushing; 85. a threaded pull rod; 86. a limiting slide block; 9. a positioning mechanism; 91. a movable ring; 92. an adjustment hole; 93. a fixed block; 94. a nut; 95. a first bolt; 10. a side plate; 11. a base; 12. a pin; 13. a guide bar; 14. heat dissipation holes; 15. an arc-shaped limiting strip; 16. an arc-shaped limiting groove; 17. a second bolt; 18. a slide rail; 19. and a limiting sliding 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.

The first embodiment is as follows:

referring to fig. 1-8, the present invention provides a technical solution: the valve sleeve honing floating self-centering clamp comprises a processing table 1, wherein a frame 2 is fixedly connected to the back surface of the processing table 1, a lifting mechanism 3 is arranged at the top of the frame 2, a honing mechanism 4 is arranged in an inner cavity of the frame 2, a driving mechanism 7 is arranged at the bottom of the inner cavity of the processing table 1, the driving mechanism 7 comprises a second stepping motor 71 arranged at the bottom of the inner cavity of the processing table 1, a first bevel gear 72 is fixedly connected to an output shaft of the second stepping motor 71, a threaded column 73 is rotatably connected to the bottom of the inner cavity of the processing table 1 through a bearing, a second bevel gear 74 is fixedly connected to the surface of the threaded column 73, the first bevel gear 72 is meshed with the second bevel gear 74, four side plates 10 are fixedly connected to the top of a top plate 6, a base 11 is fixedly connected to the center of the top plate 6, four pins 12 are fixedly connected to the surface of the base 11 in an annular manner, and one ends of the pins 12, which are far away from the base 11, are fixedly connected with the side plates 10, the top of roof 6 is provided with positioning mechanism 9, positioning mechanism 9 establishes the movable ring 91 on base 11 surface including the cover, four regulation holes 92 with pin 12 looks adaptation are seted up to the inner wall of movable ring 91, four fixed blocks 93 of surperficial annular fixedly connected with of movable ring 91, one side fixedly connected with nut 94 of fixed block 93, the inner chamber threaded connection of nut 94 has bolt 95, the one end of bolt 95 runs through fixed block 93 and with the surface contact of curb plate 10, the bottom of roof 6 is provided with fixture 8, fixture 8 is including four arm lock 81 that are located roof 6 bottom, rectangular spout 82 with arm lock 81 looks adaptation is seted up at the top of roof 6, the surperficial threaded connection of screw thread post 73 has screw thread sliding sleeve 83, the top of screw thread sliding sleeve 83 is provided with four screw thread sleeves 84, the bottom fixedly connected with spacing slider 86 of arm lock 81.

As a preferable embodiment of the present embodiment: the equal threaded connection in both ends of screw thread sleeve 84 has screw thread pull rod 85, and the screw thread pull rod 85 that is located the top rotates with limit slide 86 to be connected, and the screw thread pull rod 85 that is located the bottom rotates with screw thread sliding sleeve 83 to be connected, uses through the cooperation of screw thread sleeve 84 and screw thread pull rod 85, when can carrying out the pulling to limit slide 86, and the user also can rotate screw thread sleeve 84 and change screw thread pull rod 85's extension length, adjusts the translation rate of four arm lock 81.

As a preferable embodiment of the present embodiment: the surface at pin 12 is established to regulation hole 92 cover, and the aperture of regulation hole 92 is greater than the diameter of pin 12, uses through the cooperation of regulation hole 92 and pin 12, and user's accessible adjustment activity circle 91's planar position uses the cooperation of nut 94 and bolt 95 afterwards, carries out spacing fixed to activity circle 91.

Example two:

referring to fig. 1-8, the present invention provides a technical solution: the valve sleeve honing floating self-centering clamp comprises a processing table 1, a frame 2 is fixedly connected to the back surface of the processing table 1, a lifting mechanism 3 is arranged at the top of the frame 2, the lifting mechanism 3 comprises a first stepping motor 31 installed at the top of the processing table 1, an output shaft of the first stepping motor 31 is fixedly connected with a driving disc 32, a top plate 6 is clamped at the top of the processing table 1, a threaded driving rod 33 is arranged on the right side of the top of the frame 2 in a penetrating manner, the bottom end of the threaded driving rod 33 penetrates through an inner cavity of the frame 2 and is rotatably connected with the top of the top plate 6 through a bearing, a stress disc 34 is fixedly connected to the top end of the threaded driving rod 33, a carriage 35 is arranged in the inner cavity of the frame 2, a honing mechanism 4 is arranged in the inner cavity of the frame 2, the honing mechanism 4 comprises a driving motor 41 installed in the inner cavity of the carriage 35, a connecting threaded sleeve 42 is fixedly connected to the output shaft of the driving motor 41, and a honing head 43 is arranged at the bottom of the connecting threaded sleeve 42, the top of the honing head 43 is fixedly connected with a connecting stud 44, the connecting stud 44 is in threaded connection with the inner cavity of the connecting threaded sleeve 42, the top of the honing head 43 is provided with a protection mechanism 5, the bottom of the inner cavity of the processing table 1 is provided with a driving mechanism 7, the driving mechanism 7 comprises a second stepping motor 71 arranged at the bottom of the inner cavity of the processing table 1, an output shaft of the second stepping motor 71 is fixedly connected with a first bevel gear 72, the bottom of the inner cavity of the processing table 1 is rotatably connected with a threaded column 73 through a bearing, the surface of the threaded column 73 is fixedly connected with a second bevel gear 74, the first bevel gear 72 is meshed with the second bevel gear 74, the top of the top plate 6 is fixedly connected with four side plates 10, the center of the top plate 6 is fixedly connected with a base 11, the surface of the base 11 is annularly and fixedly connected with four pins 12, one end of each pin 12, far away from the base 11, is fixedly connected with the side plates 10, the top of the top plate 6 is provided with a positioning mechanism 9, positioning mechanism 9 establishes the movable ring 91 on base 11 surface including the cover, four regulation holes 92 with pin 12 looks adaptation are seted up to the inner wall of movable ring 91, four fixed blocks 93 of surperficial annular fixedly connected with of movable ring 91, one side fixedly connected with nut 94 of fixed block 93, the inner chamber threaded connection of nut 94 has bolt 95, the one end of bolt 95 run through fixed block 93 and with the surface contact of curb plate 10, the bottom of roof 6 is provided with fixture 8, fixture 8 is including four arm lock 81 that are located roof 6 bottom, rectangle spout 82 with arm lock 81 looks adaptation is seted up at the top of roof 6, the surperficial threaded connection of screw thread post 73 has screw thread sliding sleeve 83, the top of screw thread sliding sleeve 83 is provided with four screw thread sleeves 84, the bottom fixedly connected with spacing slider 86 of arm lock 81.

As a preferable embodiment of the present embodiment: the protection mechanism 5 comprises a sliding barrel 51 which is slidably connected to the surface of the connecting threaded sleeve 42, four clamping blocks 52 are fixedly connected to the bottom of the sliding barrel 51 in an annular mode, a fixed disc 53 is fixedly connected to the bottom of the surface of the connecting threaded stud 44, a clamping groove 54 matched with the clamping block 52 is formed in the surface of the fixed disc 53, the sliding barrel 51 and the fixed disc 53 rotate synchronously through the matching of the clamping block 52 and the clamping groove 54, secondary protection is conducted on the connecting position of the connecting threaded stud 44 and the connecting threaded sleeve 42, and the stability of the connecting threaded sleeve 42 and the connecting threaded stud 44 in use is improved.

As a preferable embodiment of the present embodiment: the spring 55 is welded at the top of the sliding barrel 51, the spring 55 is sleeved on the surface of the connecting threaded sleeve 42, the top end of the spring 55 is welded with the connecting threaded sleeve 42, and the spring 55 is arranged to exert downward pushing elasticity on the sliding barrel 51, so that the clamping block 52 can be stably clamped in the inner cavity of the clamping groove 54.

As a preferable embodiment of the present embodiment: the left side fixedly connected with guide bar 13 at 6 tops of roof, the top fixed connection of guide bar 13 in the top of 2 inner chambers of frame, guide bar 13 and balladeur train 35 sliding connection, through the setting of guide bar 13, played spacing and the effect of direction to balladeur train 35, then improved the stability of balladeur train 35 in vertical motion process.

As a preferable embodiment of the present embodiment: a plurality of heat dissipation holes 14 are formed in the two sides of the processing table 1, and through the arrangement of the heat dissipation holes 14, hot air flow in the inner cavity of the processing table 1 is discharged, so that stable operation of the second stepping motor 71 is ensured.

As a preferable aspect of the present embodiment: the surface of the connecting threaded sleeve 42 is fixedly connected with a plurality of arc-shaped limiting strips 15 in an annular mode, the inner wall of the sliding barrel 51 is provided with arc-shaped limiting grooves 16 matched with the arc-shaped limiting strips 15, and the sliding barrel 51 is limited by the aid of matching of the arc-shaped limiting strips 15 and the arc-shaped limiting grooves 16, so that the sliding barrel 51 and the connecting threaded sleeve 42 keep rotating synchronously.

As a preferable embodiment of the present embodiment: the front end and the rear end of two sides of the top plate 6 are respectively provided with a second bolt 17 in a penetrating mode, and the bottom end of the second bolt 17 is in threaded connection with the top of the machining table 1.

As a preferable embodiment of the present embodiment: eight slide rails 18 of the bottom fixedly connected with of roof 6, two adjacent slide rails 18 are located the both sides of rectangle spout 82 bottom respectively, and the spacing spout 19 with slide rail 18 looks adaptation is all seted up to the both sides at spacing slider 86 top, uses through the cooperation of slide rail 18 and spacing spout 19 for the emergence translation that spacing slider 86 can be stable, has improved the stability of arm lock 81 at the translation in-process then.

The working principle is as follows: when the valve sleeve is used, a user manually adjusts the horizontal angle of the movable ring 91, after adjustment, the bolt I95 is rotated to extrude the side plate 10, so that the movable ring 91 is limited and fixed, then the user places the valve sleeve on the top of the movable ring 91, the step motor II 71 is opened, the step motor II 71 is matched with the bevel gear I72 and the bevel gear II 74 for use, the threaded column 73 is driven to rotate, the threaded column 73 drives the threaded sliding sleeve 83 to move downwards through threads on the surface of the threaded column 73 in the rotation process, the threaded sliding sleeve 83 is matched with the threaded sleeve 84 and the threaded pull rod 85 for use, the limiting slide block 86 is pulled, and the limiting slide block 86 drives the clamping arms 81 to horizontally move, so that the four clamping arms 81 perform limiting clamping on the valve sleeve;

then, the user selects a proper honing head 43, pulls up the sliding barrel 51 to compress the spring 55, screws the connecting stud 44 into the inner cavity of the connecting threaded sleeve 42, releases the sliding barrel 51, pushes the sliding barrel 51 to move downwards by the spring 55, enables the fixture block 52 to be clamped into the inner cavity of the clamping groove 54, starts the driving motor 41, enables the driving motor 41 to drive the honing head 43 to rotate, opens the stepping motor 31, drives the threaded driving rod 33 to rotate by the cooperation of the driving disk 32 and the stress disk 34, drives the threaded driving rod 33 to rotate, drives the driving motor 41 to move downwards by the threaded driving carriage 35 on the surface, and finally enables the honing head 43 to enter the inner cavity of the valve sleeve to hone the inner wall of the valve sleeve;

through the operation of the steps, the purposes of simple and convenient operation, convenient adjustment, stable clamping and convenient honing replacement can be achieved.

In summary, the following steps: this valve barrel honing is floated from line-up clamp, setting through positioning mechanism 9, adjust the angle of support, put the valve barrel to the top of activity circle 91 afterwards, cooperation through fixture 8 and actuating mechanism 7 is used, carry out spacing centre gripping to the valve barrel, finally use through the cooperation of elevating system 3 and honing mechanism 4, hone the inner wall to the valve barrel, can reach easy and simple to handle, be convenient for adjust, the centre gripping is stable and the purpose of being convenient for change honing, this valve barrel honing is floated from line-up clamp, the current relevant processing equipment is solved in the use of reality, it is comparatively loaded down with trivial details to operate, be not convenient for adjust floating structure, and relatively poor to the clamping effect of machined part, efficiency is lower, be unfavorable for the problem of high-efficient production.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

The electrical components in the document are electrically connected with an external master controller and 220V mains supply, and the master controller can be a computer or other conventional known devices for playing a role in control.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. Valve barrel honing is floated from line-up clamp, including processing platform (1), its characterized in that: the back surface of the processing table (1) is fixedly connected with a frame (2), the top of the frame (2) is provided with a lifting mechanism (3), the lifting mechanism (3) comprises a first stepping motor (31) installed at the top of the processing table (1), an output shaft of the first stepping motor (31) is fixedly connected with a driving disc (32), the top of the processing table (1) is clamped with a top plate (6), a threaded driving rod (33) penetrates through the right side of the top of the frame (2), the bottom end of the threaded driving rod (33) penetrates through an inner cavity of the frame (2) and is rotatably connected with the top of the top plate (6) through a bearing, the top end of the threaded driving rod (33) is fixedly connected with a stress disc (34), the inner cavity of the frame (2) is provided with a carriage (35), the inner cavity of the frame (2) is provided with a honing mechanism (4), the honing mechanism (4) comprises a driving motor (41) installed in the inner cavity of the carriage (35), the output shaft of the driving motor (41) is fixedly connected with a connecting threaded sleeve (42), the bottom of the connecting threaded sleeve (42) is provided with a honing head (43), the top of the honing head (43) is fixedly connected with a connecting stud (44), the connecting stud (44) is in threaded connection with the inner cavity of the connecting threaded sleeve (42), the top of the honing head (43) is provided with a protection mechanism (5), the bottom of the inner cavity of the processing table (1) is provided with a driving mechanism (7), the driving mechanism (7) comprises a second stepping motor (71) arranged at the bottom of the inner cavity of the processing table (1), the output shaft of the second stepping motor (71) is fixedly connected with a first bevel gear (72), the bottom of the inner cavity of the processing table (1) is rotatably connected with a threaded column (73) through a bearing, and the surface of the threaded column (73) is fixedly connected with a second bevel gear (74), the bevel gear I (72) is meshed with the bevel gear II (74), the top of the top plate (6) is fixedly connected with four side plates (10), the center of the top plate (6) is fixedly connected with a base (11), four pins (12) are fixedly connected with the surface of the base (11) in an annular mode, one ends, far away from the base (11), of the pins (12) are fixedly connected with the side plates (10), the top of the top plate (6) is provided with a positioning mechanism (9), the positioning mechanism (9) comprises a movable ring (91) sleeved on the surface of the base (11), the inner wall of the movable ring (91) is provided with four adjusting holes (92) matched with the pins (12), the surface of the movable ring (91) is fixedly connected with four fixed blocks (93) in an annular mode, one side of each fixed block (93) is fixedly connected with a nut (94), and the inner cavity of each nut (94) is in threaded connection with a first bolt (95), the one end of bolt (95) runs through fixed block (93) and with the surface contact of curb plate (10), the bottom of roof (6) is provided with fixture (8), fixture (8) are including four arm lock (81) that are located roof (6) bottom, rectangle spout (82) with arm lock (81) looks adaptation are seted up at the top of roof (6), the surperficial threaded connection of screw thread post (73) has screw thread sliding sleeve (83), the top of screw thread sliding sleeve (83) is provided with four screw thread sleeve pipes (84), the bottom fixedly connected with limit slide (86) of arm lock (81).

2. The valve sleeve honing floating self-centering fixture of claim 1, wherein: protection machanism (5) are including sliding connection in slide cylinder (51) on connecting swivel nut (42) surface, four fixture blocks (52) of the bottom annular fixedly connected with of slide cylinder (51), the bottom fixedly connected with fixed disk (53) on connecting stud (44) surface, draw-in groove (54) with fixture block (52) looks adaptation are seted up on the surface of fixed disk (53).

3. The valve sleeve honing floating self-centering fixture of claim 2, wherein: the top welding of slide cartridge (51) has spring (55), spring (55) cover is established on the surface of connecting swivel nut (42), the top of spring (55) and connecting swivel nut (42) are welded mutually.

4. The valve housing honing floating self-centering fixture of claim 1, wherein: both ends of the threaded sleeve (84) are in threaded connection with threaded pull rods (85), the threaded pull rods (85) at the top are rotatably connected with the limiting sliding blocks (86), and the threaded pull rods (85) at the bottom are rotatably connected with the threaded sliding sleeves (83).

5. The valve sleeve honing floating self-centering fixture of claim 1, wherein: the adjusting hole (92) is sleeved on the surface of the pin (12), and the aperture of the adjusting hole (92) is larger than the diameter of the pin (12).

6. The valve sleeve honing floating self-centering fixture of claim 1, wherein: the left side fixedly connected with guide bar (13) at roof (6) top, the top fixed connection in the top of frame (2) inner chamber of guide bar (13), guide bar (13) and balladeur train (35) sliding connection.

7. The valve sleeve honing floating self-centering fixture of claim 1, wherein: a plurality of heat dissipation holes (14) are formed in the two sides of the processing table (1).

8. The valve sleeve honing floating self-centering fixture of claim 2, wherein: the surface of the connecting threaded sleeve (42) is annularly and fixedly connected with a plurality of arc-shaped limiting strips (15), and the inner wall of the sliding barrel (51) is provided with arc-shaped limiting grooves (16) matched with the arc-shaped limiting strips (15).

9. The valve sleeve honing floating self-centering fixture of claim 1, wherein: and the front end and the rear end of the two sides of the top plate (6) are respectively provided with a second bolt (17) in a penetrating mode, and the bottom end of the second bolt (17) is in threaded connection with the top of the machining table (1).

10. The valve sleeve honing floating self-centering fixture of claim 1, wherein: eight slide rails (18) are fixedly connected to the bottom of the top plate (6), two adjacent slide rails (18) are respectively located on two sides of the bottom of the rectangular sliding groove (82), and limiting sliding grooves (19) matched with the slide rails (18) are formed in two sides of the top of the limiting sliding block (86).