A multi-station device for fast positioning and clamping of pump housing precision machining

Abstract

This invention discloses a multi-station device for rapid positioning and clamping of pump casings in precision machining. It includes a pump casing support body, the side of which forms a pump casing clamping surface with positioning and suction components. The pump casing of a vacuum pump is positioned and clamped against the pump casing clamping surface with its axis horizontal, through the insertion of the positioning components and the suction of the suction components. The device also includes a pump casing posture verification device corresponding to the pump casing clamping surface. This device comprises a pair of verification shafts elastically connected to a movable frame. The verification shafts extend horizontally into the corresponding axis holes. Based on the difference in elastic force at the shaft ends caused by the verification shafts changing posture when embedded in the axis holes, the inclination of the pump casing clamped on the pump casing clamping surface is determined. This invention provides stable and uniform clamping force in multi-station states through magnetic clamping of the pump casing, and improves the quality and safety of pump casing machining by detecting and correcting the pump casing posture through the pump casing posture verification device.

Description

Technical Field

[0001] This invention belongs to the field of positioning and clamping technology in CNC machining of vacuum pump housings, and particularly relates to a multi-station device for rapid positioning and clamping of pump housings for precision machining. Background Technology

[0002] Existing clamping methods use pressure plates and bolts to clamp and fix parts, which results in long clamping times, uneven clamping forces leading to large deformations of the finished product, and the fact that only one product can be processed at a time, requiring multiple tool calls and tool length measurements, increasing repetitive actions for operators and reducing the safety of product processing. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, the present invention provides a multi-station device for rapid positioning and clamping of pump casing for precision machining. The device provides stable and uniform clamping force in a multi-station state by magnetically clamping the pump casing, and improves the machining quality and safety of the pump casing by using a pump casing attitude verification device to detect and correct the attitude of the pump casing.

[0004] Technical solution: To achieve the above objectives, the present invention provides a rapid positioning and clamping multi-station device for precision machining of pump casing, comprising a pump casing support body. The side of the pump casing support body is a pump casing clamping station surface with positioning elements and adsorption elements. The pump casing of the vacuum pump is positioned and clamped in a position with its back against the pump casing clamping station surface and the axis of the axial hole horizontal, through the insertion of the positioning elements and the adsorption of the adsorption elements.

[0005] The device includes a pump casing attitude verification device corresponding to the pump casing clamping station surface. The pump casing attitude verification device includes a pair of verification shafts elastically connected to a moving frame. The pair of verification shafts are in the same vertical plane and are respectively directly opposite the two shaft holes of the pump casing in the horizontal direction. When the moving frame moves toward the pump casing, the verification shafts extend horizontally into the corresponding shaft holes. Based on the difference in the elastic force at the shaft end caused by the verification shaft changing its attitude when it is embedded in the shaft hole, the tilt of the pump casing clamped on the pump casing clamping station surface is determined.

[0006] Furthermore, the pump casing support is a hollow structure with a regular polygonal prism shape, and its side surface corresponds to the pump casing clamping station surface, forming a multi-station structure for pump casing clamping.

[0007] Furthermore, the positioning element is a tapered positioning pin installed on the pump housing clamping station surface. The tapered positioning pin corresponds to the positioning hole on the back of the pump housing, and the pump housing is inserted into the tapered positioning pin through the positioning hole against the pump housing clamping station surface.

[0008] Furthermore, the adsorption component is a powerful electromagnet embedded in the mounting groove on the pump casing clamping station surface. The powerful electromagnet is flush with or slightly recessed in the mounting groove, and the pump casing, which is positioned by a conical positioning pin, is magnetically clamped by the powerful electromagnet.

[0009] Furthermore, the opening of the pump housing support has a cover plate, and a conductive slip ring is provided on the cover plate. The wire of the powerful electromagnet is connected to the conductive slip ring, and the cover plate is pressed with a sealing ring to seal the pump housing support.

[0010] Furthermore, the pump housing support has an integrally formed base, and the pump housing support is mounted on a rotary table via the base. The rotary table drives the pump housing support to rotate, thereby changing the orientation of the pump housing clamping station surface relative to the machining tool of the CNC equipment.

[0011] Furthermore, the diameter of the calibration shaft is adapted to the diameter of the central bore of the pump housing.

[0012] Furthermore, the pump casing attitude verification device includes a translation drive unit disposed on the base, and the moving frame is mounted on the translation drive unit; the moving frame has a notch, and the shaft end of the verification shaft is provided with an extension, the extension extending into the notch and connected to the moving frame through an elastic element cluster, so that the verification shaft is kept in a suspended state by the elastic support of the elastic element cluster; the elastic element cluster includes a pair of transverse support springs located on both sides of the extension and a vertical support spring located at the bottom of the extension, wherein one of the transverse support springs is a pressure sensor spring;

[0013] The inclination of the pump casing includes vertical inclination and horizontal inclination, wherein:

[0014] In this pair of calibration shafts, the vertical inclination of the pump casing, which is positioned and clamped on the pump casing clamping station surface, is determined by the difference in the pressure detection values ​​of the pressure sensor springs belonging to the upper and lower calibration shafts.

[0015] In the same calibration axis, the horizontal inclination of the pump casing, which is positioned and clamped on the pump casing clamping station surface, is determined by the difference in the pressure detection values ​​of the pressure sensor springs at the two ends of the calibration axis.

[0016] Furthermore, the tilt of the pump casing, which is positioned and clamped on the pump casing clamping station surface, is detected by the pump casing attitude verification device. When the pump casing is tilted, the powerful electromagnet is de-energized and loses its magnetic attraction force on the pump casing. The translation drive unit continues to provide the driving force for the moving frame to translate towards the pump casing. The verification shaft pushes the pump casing to correct the tilted state and transform the pump casing from a tilted state to a non-tilted state that is tightly attached to the pump casing clamping station surface.

[0017] Furthermore, it also includes a bottom support mechanism that provides bottom support for the corresponding pump casing; the pump casing is positioned and clamped on the pump casing clamping station surface of the pump casing support body by magnetic attraction from the back position of a powerful electromagnet, pushing from the opening position of a pump casing attitude verification device, and support from the bottom position of the bottom support mechanism.

[0018] Beneficial effects: The vacuum pump casing of this invention is positioned by a conical locating pin and magnetically clamped by a powerful electromagnet, enabling rapid clamping of the pump casing. The magnetic clamping provides stable clamping force, ensuring clamping stability and safety. The multi-station design allows for the processing of multiple pump casings at once, reducing unnecessary actions by CNC equipment and operators, shortening the product processing cycle, and improving processing efficiency. The pump casing attitude verification device performs attitude detection and correction, significantly improving the processing quality and safety of the pump casing. This device has three functions: attitude detection, attitude correction, and post-correction pushing, providing ample assurance for the quality and efficiency of CNC machining of the pump casing. Attached Figure Description

[0019] Appendix Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0020] Appendix Figure 2 This is a top view of the structure of the present invention;

[0021] Appendix Figure 3 For the appendix Figure 2 A schematic diagram of the cross-sectional structure along section line AA.

[0022] Appendix Figure 4 This is a schematic diagram of the pump casing attitude verification device. Detailed Implementation

[0023] The invention will now be further described with reference to the accompanying drawings.

[0024] As attached Figure 1 As shown, a multi-station device for rapid positioning and clamping of precision-machined pump casings includes a pump casing support 2. The side of the pump casing support 2 forms a pump casing clamping station surface 20 with positioning elements 3 and suction elements 4. The pump casing 1 of the vacuum pump is positioned in a clamping posture with its back against the pump casing clamping station surface 20 and its axis of the central hole 11 horizontal, through the insertion of the positioning elements 3 and the suction of the suction elements 4. More specifically, as shown in the attached diagram... Figure 3As shown, the positioning element 3 is a conical positioning pin installed on the pump housing clamping station surface 20. This conical positioning pin corresponds to the positioning hole 10 on the back of the pump housing 1. The pump housing 1 is inserted into the conical positioning pin through the positioning hole 10 against the pump housing clamping station surface 20. The adsorption element 4 is a powerful electromagnet embedded in the mounting groove on the pump housing clamping station surface 20. The powerful electromagnet is flush with the pump housing clamping station surface 20 or slightly recessed in the mounting groove. The pump housing 1, positioned by the conical positioning pin, is magnetically clamped by the powerful electromagnet. Compared with the traditional pressure plate clamping, the positioning of the vacuum pump housing 1 by the conical positioning pin and the magnetic clamping by the powerful electromagnet saves clamping time and achieves rapid clamping of the pump housing 1. Moreover, the magnetic clamping provides a stable clamping force, ensuring clamping stability and safety.

[0025] More specifically, as shown in the appendix Figure 2 and attached Figure 3 As shown, the pump housing support 2 is a hollow, polygonal prism-shaped structure with its side facing the pump housing clamping station surface 20, forming a multi-station pump housing clamping structure. This multi-station design improves processing efficiency. In this invention, the pump housing support 2 has an integrally formed base 9, which is mounted on a rotary table. The rotary table drives the pump housing support 2 to rotate, changing the orientation of the pump housing clamping station surface 20 relative to the CNC machine tool. Multiple pump housings 1 can be processed at once, reducing unnecessary actions by the CNC machine and operators, shortening the product processing cycle, and improving product processing efficiency and product qualification rate.

[0026] As attached Figure 3 As shown, the opening of the pump housing support 2 has a cover plate 6, and a conductive slip ring 7 is provided on the cover plate 6. The wire 40 of the powerful electromagnet is connected to the conductive slip ring 7. The cover plate 6 presses against the sealing ring 8 to seal the pump housing support 2, so as to prevent cutting fluid from entering the pump housing support 2 during machining operations and causing damage to the powerful electromagnet.

[0027] As attached Figure 1 Appendix Figure 3 and appendix Figure 4 As shown, the present invention includes a pump casing attitude verification device 5 corresponding to the pump casing clamping station surface 20. The pump casing attitude verification device 5 includes a pair of verification shafts 51 elastically connected to the moving frame 50. The pair of verification shafts 51 are located in the same vertical plane and are respectively directly opposite the two shaft holes 11 of the pump casing 1 in the horizontal direction. When the moving frame 50 moves toward the pump casing 1, the verification shafts 51 extend horizontally into the corresponding shaft holes 11. Based on the difference in the elastic force at the shaft end caused by the verification shafts 51 changing their attitude when embedded in the shaft holes 11, the tilt of the pump casing 1 positioned and clamped on the pump casing clamping station surface 20 is determined.

[0028] It is worth noting that the diameter of the calibration shaft 51 is adapted to the diameter of the shaft hole 11 of the pump housing 1, so that the calibration shaft 51 can be embedded in the shaft hole 11 when performing calibration actions, thereby improving the subsequent correction accuracy of the pump housing 1's posture.

[0029] The pump casing attitude verification device 5 includes a translation drive unit 52 disposed on the base 9, and a moving frame 50 is mounted on the translation drive unit 52. The moving frame 50 has a notch 53, and the end of the verification shaft 51 is provided with an extension 55. The extension 55 extends into the notch 53 and is connected to the moving frame 50 through an elastic element cluster 54, so that the verification shaft 51 is kept suspended by the elastic support of the elastic element cluster 54. The elastic element cluster 54 includes a pair of transverse support springs 54.1 located on both sides of the extension 55 and a vertical support spring 54.2 located at the bottom of the extension 55, wherein one of the transverse support springs 54.1 is a pressure sensor spring 54.3.

[0030] The inclination of the pump casing 1 includes vertical inclination and horizontal inclination, wherein:

[0031] In the pair of calibration shafts 51, the vertical tilt of the pump casing 1, which is positioned and clamped on the pump casing clamping station surface 20, is determined by the difference in the pressure detection values ​​of the pressure sensor springs 54.3 belonging to the upper and lower calibration shafts 51. More specifically, when there is a difference in the pressure detection values ​​of the pressure sensor springs 54.3 belonging to the upper and lower calibration shafts 51, it indicates that the pump casing 1, which is positioned and clamped on the pump casing clamping station surface 20, has tilted vertically.

[0032] In the same calibration axis 51, the horizontal inclination of the pump casing 1, which is positioned and clamped on the pump casing clamping station surface 20, is determined by the difference in the pressure detection values ​​of the pressure sensor springs 54.3 at the two ends of a calibration axis 51. More specifically, when there is a difference in the pressure detection values ​​of the pressure sensor springs 54.3 at the two ends of a calibration axis 51, it indicates that the pump casing 1, which is positioned and clamped on the pump casing clamping station surface 20, has tilted horizontally.

[0033] Therefore, it can detect both the vertical tilt of the pump casing 1 and the horizontal tilt of the pump casing 1, making the tilt detection very comprehensive and more accurate.

[0034] It is worth noting that the pump housing attitude verification device 5 detects the tilt of the pump housing 1, which is positioned and clamped on the pump housing clamping station surface 20. When the pump housing 1 is tilted, the powerful electromagnet is de-energized and loses its magnetic attraction to the pump housing 1. After the magnetic attraction disappears, it is easier to correct the attitude of the pump housing. The translation drive unit 52 continues to provide the driving force for the moving frame 50 to translate towards the pump housing 1. The verification shaft 51 pushes the pump housing 1, correcting the pump housing 1 from a tilted state to a non-tilted state that is tightly attached to the pump housing clamping station surface 20. Therefore, the present invention uses the pump housing attitude verification device 5 to detect and correct the attitude of the pump housing 2, which greatly improves the processing quality and safety of the pump housing 2.

[0035] The present invention also includes a bottom support mechanism 16 for bottom support of the pump housing 1, preferably a cylinder; the pump housing is positioned and clamped on the pump housing clamping station surface 20 of the pump housing support body 2 by magnetic attraction from the back position of a powerful electromagnet, pushing from the opening position of the pump housing posture verification device 5, and support from the bottom position of the bottom support mechanism 16, which greatly improves the stability of positioning and clamping the pump housing 1 and is more conducive to improving processing quality and pass rate.

[0036] In summary, the pump casing attitude verification device 5 of the present invention has three functions: attitude detection, attitude correction, and push-press after attitude correction, which provides sufficient guarantee for the CNC machining quality and efficiency of the pump casing 2.

[0037] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A multi-station device for rapid positioning and clamping of precision-machined pump casings, characterized in that: The pump housing support (2) is a pump housing clamping station surface (20) with a positioning element (3) and an adsorption element (4) on its side. The pump housing (1) of the vacuum pump is positioned and clamped with its back against the pump housing clamping station surface (20) and the axis of the axial hole (11) is horizontal through the insertion of the positioning element (3) and the adsorption of the adsorption element (4). The pump housing posture verification device (5) is included, which is corresponding to the pump housing clamping station surface (20). The pump housing posture verification device (5) includes a pair of verification shafts (51) that are elastically connected to the moving frame (50). The pair of verification shafts (51) are in the same vertical plane and are respectively directly opposite the two shaft holes (11) of the pump housing (1) in the horizontal direction. When the moving frame (50) moves toward the pump housing (1), the verification shafts (51) extend horizontally into the corresponding shaft holes (11). Based on the difference in the elastic force at the shaft end caused by the verification shafts (51) changing their posture when embedded in the shaft holes (11), the tilt of the pump housing (1) that is positioned and clamped on the pump housing clamping station surface (20) is determined. The pump housing support (2) has an integrally formed base (9). The pump housing support (2) is mounted on a rotary table through the base (9). The rotary table drives the pump housing support (2) to rotate, so as to convert the orientation of the pump housing clamping station surface (20) relative to the machining tool of the CNC equipment. The adsorption component (4) is a powerful electromagnet embedded in the mounting groove on the pump housing clamping station surface (20); The diameter of the verification shaft (51) is adapted to the diameter of the shaft hole (11) of the pump housing (1); The pump casing attitude verification device (5) includes a translation drive unit (52) disposed on the base (9), and the moving frame (50) is mounted on the translation drive unit (52); the moving frame (50) has a notch (53) and the end of the verification shaft (51) is provided with an extension (55). The extension (55) extends into the notch (53) and is connected to the moving frame (50) through an elastic element cluster (54), so that the verification shaft (51) is kept suspended by the elastic support of the elastic element cluster (54); the elastic element cluster (54) includes a pair of transverse support springs (54.1) located on both sides of the extension (55) and a vertical support spring (54.2) located at the bottom of the extension (55), wherein one of the transverse support springs (54.1) is a pressure sensor spring (54.3); The inclination of the pump casing (1) includes vertical inclination and horizontal inclination, wherein: In the pair of calibration shafts (51), the vertical inclination of the pump casing (1) positioned on the pump casing clamping station surface (20) is determined by the difference in pressure detection values ​​of the pressure sensor springs (54.3) belonging to the upper and lower calibration shafts (51); In the same calibration axis (51), the difference in pressure detection values ​​of the pressure sensor springs (54.3) at the two ends of the calibration axis (51) is used to determine the horizontal inclination of the pump casing (1) positioned and clamped on the pump casing clamping station surface (20); The tilt of the pump housing (1) positioned on the pump housing clamping station surface (20) is detected by the pump housing attitude verification device (5). When the pump housing (1) is tilted, the powerful electromagnet loses power and loses its magnetic attraction force on the pump housing (1). The translation drive unit (52) continues to provide the driving force for the moving frame (50) to translate towards the pump housing (1). The verification shaft (51) pushes the pump housing (1) to correct the tilted state and change the pump housing (1) to a non-tilted state that is closely attached to the pump housing clamping station surface (20).

2. The multi-station device for rapid positioning and clamping of pump casing precision machining according to claim 1, characterized in that: The pump casing support (2) is a hollow structure with a regular polygonal prism shape. Its side surface corresponds to the pump casing clamping station surface (20), forming a pump casing clamping multi-station surface structure.

3. The multi-station device for rapid positioning and clamping of pump casing precision machining according to claim 2, characterized in that: The positioning component (3) is a tapered positioning pin installed on the pump housing clamping station surface (20). The tapered positioning pin corresponds to the positioning hole (10) on the back of the pump housing (1). The pump housing (1) is fitted with the tapered positioning pin by passing through the positioning hole (10) against the pump housing clamping station surface (20).

4. The multi-station device for rapid positioning and clamping of pump casing precision machining according to claim 3, characterized in that: The powerful electromagnet is flush with or slightly recessed in the mounting groove of the pump casing clamping station surface (20). The pump casing (1), which is positioned by the conical positioning pin, is magnetically clamped by the powerful electromagnet.

5. The multi-station device for rapid positioning and clamping of pump casing precision machining according to claim 4, characterized in that: The opening of the pump housing support (2) has a cover plate (6), and a conductive slip ring (7) is provided on the cover plate (6). The wire (40) of the powerful electromagnet is connected to the conductive slip ring (7). The cover plate (6) presses against the sealing ring (8) to seal the pump housing support (2).

6. The multi-station device for rapid positioning and clamping of pump casing precision machining according to claim 1, characterized in that: It also includes a bottom support mechanism (16) that provides bottom support for the corresponding pump casing (1); the pump casing is positioned and clamped on the pump casing clamping station surface (20) of the pump casing support body (2) by magnetic attraction from the back position of a powerful electromagnet, pushing from the opening position of the pump casing posture verification device (5) and support from the bottom position of the bottom support mechanism (16).

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