CN115837589A - Valve processing clamping device - Google Patents
Valve processing clamping device Download PDFInfo
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- CN115837589A CN115837589A CN202211409670.XA CN202211409670A CN115837589A CN 115837589 A CN115837589 A CN 115837589A CN 202211409670 A CN202211409670 A CN 202211409670A CN 115837589 A CN115837589 A CN 115837589A
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- 238000003754 machining Methods 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims description 16
- 239000010959 steel Substances 0.000 claims description 16
- 230000005540 biological transmission Effects 0.000 claims description 13
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000007788 roughening Methods 0.000 claims 1
- 238000010079 rubber tapping Methods 0.000 abstract description 11
- 238000003780 insertion Methods 0.000 description 11
- 230000037431 insertion Effects 0.000 description 11
- 238000003756 stirring Methods 0.000 description 7
- 238000005520 cutting process Methods 0.000 description 4
- 238000005553 drilling Methods 0.000 description 4
- 238000005266 casting Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The invention belongs to the technical field of valve machining, in particular to a valve machining clamping device, and provides a scheme for solving the problem that the operation direction cannot be changed in the prior art by valve clamping. According to the invention, after the valve body is clamped by the device, when the interface round table of the valve body needs to be tapped, the driving motor is started only by removing the locking of the pin positioning mechanism, so that the turning tool can be matched for tapping, and when the flange disc end needs to be drilled, the position of the positioning disc is locked, and the hole is drilled from the side.
Description
Technical Field
The invention relates to the technical field of valve machining, in particular to a valve machining clamping device.
Background
The valve body of the valve for the large-diameter pipe is usually in an asymmetric structure, has a complex appearance, is generally formed by casting, and is processed by numerical control equipment. The valve body of a newly developed valve is in an asymmetric three-way structure and mainly comprises an inlet flange, an outlet flange, an interface circular truncated cone, an inner cavity and the like, the design requirement is that a forging piece is adopted for machining, and the roughness requirement of a sealing groove at each outlet is very high.
Consequently need all to drill or the grooving operation inlet flange and outlet flange after the casting is accomplished, the tapping processing also needs to be done to the inside interface round platform department that is close to of valve body, present clamping device adopts general anchor clamps to carry out wideling clamp to the valve body, with the operation side towards the lathe tool, dismantle after the operation is accomplished and change the direction again and continue the centre gripping, clamping work need be done many times to this kind of mode, the valve body is damaged easily at one kind, secondly consume a large amount of time energy and be used for the centre gripping preparation, and the centering is adjusted preparation work and is spent time huge, consequently just need a novel clamping device of convertible operating angle in order to improve production efficiency.
Disclosure of Invention
The invention provides a valve processing clamping device, aiming at overcoming the problem that the operation direction can not be converted in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a valve processing clamping device, establishes the operation panel of cavity in including, the upper surface middle part of operation panel inlays and is equipped with tapered roller bearing, and the inside of operation panel is close to the middle part and is fixed with the bearing fixing plate parallel with the top layer each other, and rotate between bearing fixing plate and the tapered roller bearing and be connected with same spinal branch stay tube, the top middle part of stay tube has the draw-in groove in advance, and the joint has two relative and parallel channel-section steel slide rails of each other of opening in the draw-in groove, is close to the slider of both ends sliding connection with two symmetries of each other between two channel-section steel slide rails, is provided with between two sliders and draws the mechanism, and the top of two sliders is fixed with the arc grip block of symmetry of each other respectively, all is provided with the skid resistant course in the arc wall of arc grip block to can align the valve body from the both sides of middle waist when the centre gripping and carry out the centre gripping, driven pulley has cup jointed to the circumference outer wall of stay tube, and the top inner wall of operation panel is close to the edge is fixed with driving motor, thereby the output shaft top of driving motor is fixed has the initiative that forms transmission connection with driven pulley, and the tapping mechanism can carry out the side locking of tapping mechanism and need to the side locking the drilling to carry out the tapping mechanism, the round platform, and only need to carry out the drilling to carry out the side locking and the cooperation of the tapping mechanism, the round platform, can carry out the round platform.
As a preferable scheme in the invention, the pulling mechanism comprises an arched plate fixed between the lower surfaces of the two channel steel slide rails, a bearing is embedded in the middle of the lower surface of the arched plate, the middle of the bearing is rotatably connected with a transmission rod, a driving gear and a spring lock rod are respectively fixed at the upper end and the lower end of the transmission rod, a locking disc is fixed on the lower surface of the arched plate, and under a normal condition, the end part of the spring lock rod is tightly pressed on the surface of the locking disc to lock the radial position of the transmission rod to prevent the transmission rod from rotating.
As a preferable scheme in the invention, one side of each of the two sliding blocks, which is opposite to the driving gear, is provided with a sliding pipe groove which is centrosymmetric with respect to the driving gear, the bottom of each sliding pipe groove is fixed with a tension spring, the end part of each tension spring is fixed with a sliding pipe, the end part of each sliding pipe is fixed with the end part of each tension spring, one end of each sliding pipe, which is opposite to the other end of each sliding pipe, is fixed with a rack which is centrosymmetric with each other, the tooth surfaces of the two racks are opposite and are respectively meshed with the driving gear, and the side surfaces of the sliding blocks are respectively provided with a rectangular hole which is matched with the section size of the rack, so that the two racks can be driven to move towards the middle or towards the middle by the rotation of the driving gear during operation, and the arrangement of the tension springs is matched to generate clamping force towards the middle all the time.
Preferably, the positioning mechanism includes an outer tube fixed on the top inner wall of the console and an inner insertion rod slidably connected to an opening at the bottom end of the outer tube, a compression spring is fixed between the top end of the inner insertion rod and the bottom of the outer tube, a pull rod is fixed at the top end of the inner insertion rod, a pull ring is fixed at the top end of the pull rod, and an anti-slip tooth is fixed at the bottom end of the inner insertion rod on the upper surface of the positioning disk.
According to the preferred scheme, the hexagonal nuts are embedded in the circumferential outer walls of the supporting tubes and located on the side faces of the channel steel slide rails, the fastening bolts are screwed in the hexagonal nuts, the positions of the two channel steel slide rails can be finely adjusted before turning, so that the center of the interface circular truncated cone is located on the central shaft of the cutting position, and the cutting precision is guaranteed.
According to the preferable scheme of the invention, the anti-slip layer is made of rubber materials, and the surface of the anti-slip layer is subjected to galling treatment, so that the static friction force is improved, and the protection effect on the outer wall of the valve body can also be improved.
In a preferred embodiment of the present invention, an E-shaped fixing plate is fixed in the middle of the bottom of the operating platform, and the driving rod penetrates through the E-shaped fixing plate and is fixed with a driven gear at the bottom end position of the driving rod.
According to the preferred scheme, the shaft rod is fixed on the lower surface of the bearing fixing plate close to the edge, the shifting gear disc is sleeved on the outer wall of the shaft rod, the edge of the shifting gear disc is meshed with the driven gear, the upper surface of the shifting gear disc close to the circumferential edge is provided with the insertion holes for inserting the shifting rod to rotate the shifting gear disc, and the circumferential edge of the shifting gear disc protrudes out of the side wall of the operating table, so that the shifting gear disc can be rotated from the outer side to drive the pulling mechanism.
As a preferable scheme in the invention, the upper surface of the toggle gear plate is fixedly provided with the annularly distributed check grooves below the positioning mechanism.
To sum up, the beneficial effect in this scheme is:
1. according to the valve machining clamping device, the supporting tube which can rotate and can also be positioned and the arc-shaped clamping block at the top end of the supporting tube are arranged, so that after the valve body is clamped by the device, when the interface round table of the valve body needs to be tapped, the driving motor is started only by removing the locking of the pin positioning mechanism, the valve can be matched with a turning tool for tapping, and when the flange disc end needs to be drilled, the position of the positioning disc only needs to be locked, and the side surface is drilled;
2. according to the valve processing clamping device, the two racks which are mutually centrosymmetric and driven by the driving gear and the sliding blocks fixed at the end parts of the racks are arranged, so that the two racks can be driven to move oppositely or towards the middle simultaneously through the rotation of the driving gear during operation so as to drive the arc-shaped clamping blocks at the top ends of the two sliding blocks to move towards the middle, and the clamping force towards the middle can be always generated by matching with the arrangement of the tension spring;
3. this kind of valve processing clamping device through the positioning mechanism who sets up, can be when using, when needing to remove the position locking to the positioning disk, only needs upwards to drag the pull ring on pull rod top, can let the bottom and the anti-skidding tooth of interpolation pole break away from this moment, and the positioning disk can the free rotation.
Drawings
Fig. 1 is a schematic cross-sectional structural view of a valve machining clamping device according to the present invention;
fig. 2 is a schematic structural diagram of an assembly of a valve machining clamping device pulling mechanism according to the present invention;
fig. 3 is a schematic perspective view of a supporting tube of a valve machining clamping device according to the present invention;
FIG. 4 is a schematic perspective view of an assembly position of a locking plate of a valve machining clamping device according to the present invention;
fig. 5 is an enlarged schematic structural view of a valve machining clamping device according to the present invention at a point a in fig. 1;
fig. 6 is a cross-sectional view of a valve machining clamping device according to a second embodiment of the invention.
In the figure: 1. an operation table; 2. a bearing fixing plate; 3. positioning a plate; 4. a pulling mechanism; 41. a driving gear; 42. an arcuate plate; 43. a spring lock lever; 44. a locking disc; 5. supporting a tube; 501. a card slot; 502. a hexagonal nut; 503. fastening a bolt; 6. a positioning mechanism; 61. a pull ring; 62. a compression spring; 63. an outer tube; 64. an inner insertion rod; 65. a pull rod; 7. a driven pulley; 8. a tapered roller bearing; 9. a channel steel slide rail; 10. an anti-slip layer; 11. an arc-shaped clamping block; 12. a slider; 13. a rack; 14. e-shaped fixing plates; 15. a check groove; 16. a driven gear; 17. shifting a gear disc; 18. a slide pipe; 19. a tension spring; 20. a rectangular hole.
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.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Example 1
Referring to fig. 1-5, a valve processing clamping device comprises an operating table 1 with a cavity arranged therein, wherein a tapered roller bearing 8 is embedded in the middle of the upper surface of the operating table 1, a bearing fixing plate 2 parallel to the top layer is fixed near the middle inside the operating table 1, a same supporting tube 5 is rotatably connected between the bearing fixing plate 2 and the tapered roller bearing 8, a clamping groove 501 is reserved in the middle of the top end of the supporting tube 5, two channel steel slide rails 9 with opposite openings and parallel to each other are clamped in the clamping groove 501, two symmetrical slide blocks 12 are slidably connected between the two channel steel slide rails 9 near the two ends, a pulling mechanism 4 is arranged between the two slide blocks 12, symmetrical arc-shaped clamping blocks 11 are respectively fixed at the top ends of the two slide blocks 12, and anti-skid layers 10 are arranged in arc-shaped grooves of the arc-shaped clamping blocks 11, thereby can be in the centre gripping to the valve body in the time of the centre gripping from the both sides alignment of middle waist carry out the centre gripping, driven pulley 7 has been cup jointed to the circumference outer wall of stay tube 5, and the top inner wall of operation panel 1 is close to the edge and is fixed with driving motor, driving motor's output shaft top is fixed with the drive pulley who forms the transmission with driven pulley 7 and be connected, the below that the circumference outer wall of stay tube 5 is located driven pulley 7 is fixed with positioning disk 3, operation panel 1 top inner wall is close to positioning disk 3 circumference edge top and is fixed with positioning mechanism 6, thereby can be after the device presss from both sides the valve body tightly, when needing to carry out the tapping to the interface round platform department of valve body, only need to remove the locking restart driving motor of positioning mechanism 6, can cooperate the lathe tool to carry out the tapping, and when need to bore flange dish end, only need to lock the position of positioning disk 3, it can to bore from the side.
In the invention, the pulling mechanism 4 comprises an arched plate 42 fixed between the lower surfaces of two channel steel slide rails 9, a bearing is embedded in the middle of the lower surface of the arched plate 42, a transmission rod is rotatably connected in the middle of the bearing, a driving gear 41 and a spring lock rod 43 are respectively fixed at the upper end and the lower end of the transmission rod, a locking disc 44 is fixed on the lower surface of the arched plate 42, and under normal conditions, the end part of the spring lock rod 43 is tightly pressed on the surface of the locking disc 44 to lock the radial position of the transmission rod to prevent the transmission rod from rotating.
The opposite sides of the two sliders 12 are respectively provided with sliding tube grooves which are centrosymmetric with respect to the driving gear 41, the groove bottoms of the sliding tube grooves are fixedly provided with tension spring springs 19, the end parts of the tension springs 19 are fixedly provided with sliding tubes 18, the end parts of the sliding tubes 18 are fixed with the end parts of the tension springs 19, the opposite ends of the two sliding tubes 18 are respectively fixedly provided with racks 13 which are centrosymmetric with each other, the tooth surfaces of the two racks 13 are opposite and are respectively meshed with the driving gear 41, the side surfaces of the sliders 12 are respectively provided with rectangular holes 20 matched with the cross section sizes of the racks 13, so that the two racks 13 can be driven to move towards each other or towards the middle by the rotation of the driving gear 41 during operation to drive the two sliders 12 to move towards the middle, and the arrangement of the tension springs 19 can always generate clamping force towards the middle.
The positioning mechanism 6 comprises an outer tube 63 fixed on the top inner wall of the operation table 1 and an inner insertion rod 64 slidably connected to an opening at the bottom end of the outer tube 63, a compression spring 62 is fixed between the top end of the inner insertion rod 64 and the bottom of the outer tube 63, a pull rod 65 is fixed at the top end of the inner insertion rod 64, a pull ring 61 is fixed at the top end of the pull rod 65, and anti-slip teeth are fixed at the bottom end of the inner insertion rod 64 on the upper surface of the positioning disc 3, so that when the positioning disc 3 needs to be unlocked in use, only the pull ring 61 at the top end of the pull rod 65 needs to be pulled upwards, the bottom end of the inner insertion rod 64 can be separated from the anti-slip teeth, and the positioning disc 3 can rotate freely.
The hexagonal nut 502 is embedded in the side face, located on the channel steel slide rail 9, of the circumferential outer wall of the support tube 5, the fastening bolt 503 is screwed in the hexagonal nut 502, the positions of the two channel steel slide rails 9 can be finely adjusted before turning, so that the center of the interface circular truncated cone is located on the central shaft of the cutting position, and cutting accuracy is guaranteed.
Wherein, skid resistant course 10 is made for rubber materials, and this skid resistant course 10's surface is done and is napped and handle, has improved the static friction, also can improve the protection effect to the valve body outer wall.
The working principle is as follows: before use, the spring lock rod 43 is shifted reversely to drive the driving gear 41 to rotate, the two sliding blocks 12 are pushed to two sides, then the valve body to be operated is placed between the two arc-shaped clamping blocks 11, the spring lock rod 43 is positively transmitted until the two arc-shaped clamping blocks 11 are moved to the middle and cannot be moved, and then the two channel steel slide rails 9 are fixed in the middle of the clamping groove 501 at the top end of the supporting tube 5 through the fastening bolts 503; after the valve body is clamped by the device, when tapping is needed to be carried out on the interface round platform of the valve body, the driving motor is started again only by locking the pin positioning mechanism 6, the turning tool can be matched for tapping, and when drilling is needed to be carried out on the flange plate end, the position of the positioning plate 3 is only needed to be locked, and drilling can be carried out from the side face.
Example 2
Referring to fig. 6, a valve machining clamping device, in this embodiment, compared with embodiment 1, further includes an E-shaped fixing plate 14 fixed at the bottom middle of the operating platform 1, and a driven gear 16 fixed at the bottom end position of the driving rod passing through the E-shaped fixing plate 14.
Wherein, the lower surface of bearing fixing plate 2 is close to the edge and is fixed with the axostylus axostyle, and the outer wall of axostylus axostyle has cup jointed stirring toothed disc 17, and stirring toothed disc 17's edge and driven gear 16 intermeshing, stirring toothed disc 17's upper surface is close to circumference edge and opens there is the jack, be used for pegging graft stir the pole and rotate stirring toothed disc 17, stir the outstanding lateral wall of operation panel 1 of circumference edge of toothed disc 17, thereby can follow the outside and rotate stirring toothed disc 17 and can drive pulling mechanism 4.
Wherein, the upper surface of the toggle gear plate 17 is fixed with a non-return groove 15 which is distributed annularly below the positioning mechanism 6.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A valve machining clamping device comprises an operating table (1) with a cavity arranged therein, wherein a tapered roller bearing (8) is embedded in the middle of the upper surface of the operating table (1), a bearing fixing plate (2) parallel to a top layer is fixed near the middle inside the operating table (1), a same supporting tube (5) is rotatably connected between the bearing fixing plate (2) and the tapered roller bearing (8), a clamping groove (501) is reserved in the middle of the top end of the supporting tube (5), two channel steel sliding rails (9) with opposite openings and parallel to each other are connected in the clamping groove (501) in a clamping mode, two sliding blocks (12) which are symmetrical to each other are connected between the two channel steel sliding rails (9) in a sliding mode at two ends, a pulling mechanism (4) is arranged between the two sliding blocks (12), arc-shaped clamping blocks (11) which are symmetrical to each other are fixed at the top ends of the two sliding blocks (12), an anti-slip layer (10) is arranged in each arc-shaped groove of each arc-shaped clamping block (11), a driven belt pulley (7) is sleeved on the outer wall of the supporting tube (5), a driving motor is fixed at the edge of the top end of the top inner wall of the operating table (1), a driving motor, and a driving motor output shaft (7) of the driving motor are connected with the driven belt pulley (3) to form a driving pulley (7) fixed below positioning disc, a positioning mechanism (6) is fixed above the inner wall of the top of the operating platform (1) and close to the circumferential edge of the positioning disk (3).
2. The valve machining clamping device is characterized in that the pulling mechanism (4) comprises an arched plate (42) fixed between the lower surfaces of the two channel steel sliding rails (9), a bearing is embedded in the middle of the lower surface of the arched plate (42), a transmission rod is rotatably connected to the middle of the bearing, a driving gear (41) and a spring locking rod (43) are fixed to the upper end and the lower end of the transmission rod respectively, and a locking disc (44) is fixed to the lower surface of the arched plate (42).
3. The valve machining clamping device is characterized in that one side, opposite to each sliding block (12), of each sliding block is provided with a sliding pipe groove which is centrosymmetric to the driving gear (41), a tension spring (19) is fixed to the bottom of each sliding pipe groove, a sliding pipe (18) is fixed to the end of each tension spring (19), the end of each sliding pipe (18) is fixed to the end of each tension spring (19), racks (13) which are centrosymmetric to each other are fixed to one end, opposite to each sliding pipe (18), of each sliding pipe (18), tooth surfaces of the two racks (13) are opposite and meshed with the driving gear (41), and rectangular holes (20) matched with the cross section sizes of the racks (13) are formed in the side surfaces of the sliding blocks (12).
4. The valve machining clamping device is characterized in that the positioning mechanism (6) comprises an outer tube (63) fixed at the top inner wall of the operating platform (1) and an inner inserting rod (64) connected to the bottom end opening of the outer tube (63) in a sliding mode, a compression spring (62) is fixed between the top end of the inner inserting rod (64) and the bottom of the outer tube (63), a pull rod (65) is fixed to the top end of the inner inserting rod (64), a pull ring (61) is fixed to the top end of the pull rod (65), and anti-skidding teeth are fixed to the upper surface of the positioning disc (3) at the bottom end of the inner inserting rod (64).
5. The valve machining clamping device is characterized in that a hexagonal nut (502) is embedded in the circumferential outer wall of the supporting pipe (5) on the side face of the channel steel sliding rail (9), and a fastening bolt (503) is screwed in the hexagonal nut (502).
6. The valve machining clamping device is characterized in that the anti-slip layer (10) is made of rubber materials, and the surface of the anti-slip layer (10) is subjected to roughening treatment.
7. A valve machining clamp device according to claim 2, characterized in that an E-shaped fixing plate (14) is fixed to the bottom of the operating table (1) in the middle, and the transmission rod is fixed with a driven gear (16) at its bottom end position through the E-shaped fixing plate (14).
8. The valve machining clamping device according to claim 7, characterized in that a shaft rod is fixed to the lower surface of the bearing fixing plate (2) close to the edge, a toggle gear plate (17) is sleeved on the outer wall of the shaft rod, the edge of the toggle gear plate (17) is meshed with the driven gear (16), jacks are formed in the upper surface of the toggle gear plate (17) close to the circumferential edge, and the circumferential edge of the toggle gear plate (17) protrudes out of the side wall of the operating table (1).
9. The valve machining clamping device is characterized in that the upper surface of the toggle gear plate (17) is provided with the ring-shaped check grooves (15) below the positioning mechanism (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211409670.XA CN115837589A (en) | 2022-11-11 | 2022-11-11 | Valve processing clamping device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211409670.XA CN115837589A (en) | 2022-11-11 | 2022-11-11 | Valve processing clamping device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115837589A true CN115837589A (en) | 2023-03-24 |
Family
ID=85577092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211409670.XA Pending CN115837589A (en) | 2022-11-11 | 2022-11-11 | Valve processing clamping device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115837589A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1177488A (en) * | 1997-09-01 | 1999-03-23 | Sony Corp | Index attachment |
| JP2000301429A (en) * | 1999-04-20 | 2000-10-31 | Matsushita Electric Ind Co Ltd | Dividing device |
| EP1688213A1 (en) * | 2005-02-02 | 2006-08-09 | Ludwig Ehrhardt GmbH | Rotating swivel unit |
| CN212858790U (en) * | 2020-09-02 | 2021-04-02 | 辽宁博众特自动化技术有限公司 | Box centering positioning mechanism |
| CN114888572A (en) * | 2022-06-08 | 2022-08-12 | 李丽丽 | Vacuum pump cover drilling and tapping device with fixing mechanism |
-
2022
- 2022-11-11 CN CN202211409670.XA patent/CN115837589A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1177488A (en) * | 1997-09-01 | 1999-03-23 | Sony Corp | Index attachment |
| JP2000301429A (en) * | 1999-04-20 | 2000-10-31 | Matsushita Electric Ind Co Ltd | Dividing device |
| EP1688213A1 (en) * | 2005-02-02 | 2006-08-09 | Ludwig Ehrhardt GmbH | Rotating swivel unit |
| CN212858790U (en) * | 2020-09-02 | 2021-04-02 | 辽宁博众特自动化技术有限公司 | Box centering positioning mechanism |
| CN114888572A (en) * | 2022-06-08 | 2022-08-12 | 李丽丽 | Vacuum pump cover drilling and tapping device with fixing mechanism |
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Application publication date: 20230324 |