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CN-122007885-A - Automatic press-fit testing mechanism for pump stator and rotor

CN122007885ACN 122007885 ACN122007885 ACN 122007885ACN-122007885-A

Abstract

The invention discloses an automatic press-fit testing mechanism for a pump stator and a pump rotor, and belongs to the technical field of automatic assembly and testing. The mechanism comprises a frame, a material positioning module, a movable conveying module, a material taking and carrying module, a centering press-fitting module and a combined-fitting testing module which are arranged on the frame. The material positioning module is provided with a tool base for placing the pump body and the rotor, the centering press assembly module comprises a lower jacking unit and an upper press assembly unit which are coaxially aligned, the lower jacking unit and the upper press assembly unit are used for clamping and centering simultaneously from the upper end and the lower end of the pump body so as to overcome the offset caused by magnetic attraction, the tail end of the upper press assembly unit is provided with an elastic pressure head for adsorbing and pressing in a pump cover, and the combined assembly test module comprises a detection unit, a rotary driving unit and a torque sensor and is used for comprehensively testing the electrical and mechanical properties of the assembled assembly. The invention realizes full-automatic medium-pressure mounting and online detection of the pump body, the rotor and the pump cover, and has the advantages of high assembly precision, strong adaptability, controllable quality, high production efficiency and the like.

Inventors

  • FANG CHAOQI
  • CHEN WANGBIN
  • CHEN LUYANG
  • QIAN PENG
  • DENG LULU

Assignees

  • 杭州沃镭智能科技股份有限公司

Dates

Publication Date
20260512
Application Date
20260305

Claims (10)

  1. 1. The automatic press-fit testing mechanism for the pump stator and the pump rotor is characterized by comprising a frame, a material positioning module (1), a movable conveying module (2), a material taking and carrying module (3), a centering press-fit module (4) and a combined test module (5) which are arranged on the frame, wherein the material positioning module (1) is provided with a tool base for placing a pump body (11) and a rotor (13), the centering press-fit module (4) comprises a lower jacking unit (41) and an upper press-fit unit (42) which are coaxially aligned, and the lower jacking unit and the upper press-fit unit (42) are used for clamping and centering simultaneously from the upper end and the lower end of the pump body (11) so as to overcome offset caused by magnetic adsorption, and an elastic pressure head for adsorbing and pressing in a pump cover (12) is arranged at the tail end of the upper press-fit unit (42).
  2. 2. The automatic press-fit testing mechanism for the pump stator and rotor according to claim 1, wherein the combined testing module (5) comprises a detection unit (51), a rotation driving unit (52) for driving the rotor (13) to rotate and a torque sensor (53), and the detection unit (51) is provided with a probe for electrically connecting the pump body (11) and a voltage sensor electrically connected with the probe.
  3. 3. The automatic press-fit testing mechanism for the pump stator and rotor according to claim 2, wherein the detecting unit (51) comprises a liftable probe seat and at least two probes arranged on the liftable probe seat, the probe seat is driven by a cylinder or a servo motor to enable the probes to be in contact with testing contacts on the pump body (11) to form a current testing loop.
  4. 4. The automatic press-fit testing mechanism for the pump stator and the pump rotor according to claim 1, wherein the movable conveying module (2) has a reciprocating linear displacement function and is used for sequentially conveying and positioning the material positioning module (1) at a material taking position, a press-fit position and a testing position.
  5. 5. The automatic press-fit testing mechanism for the pump stator and rotor according to claim 1, wherein the material taking and carrying module (3) comprises a driving part and a clamping jaw arranged at the driving end of the driving part, and is used for grabbing and transferring the rotor (13).
  6. 6. The automatic press-fit testing mechanism for pump stator and rotor according to claim 5, wherein the clamping jaw can be lifted and lowered in the vertical direction, the moving and conveying module (2) conveys the material positioning module (1) to a preset position in the first direction of horizontal movement, and the clamping jaw places the rotor (13) on the pump body (11) in the second direction of vertical movement.
  7. 7. The automatic press-fit testing mechanism for the pump stator and the rotor according to claim 1, wherein the elastic pressure head comprises a mounting base, a sucker and an elastic element, and the sucker is connected with the mounting base through the elastic element, so that the sucker has axial floating compensation capability when the pump cover (12) is pressed.
  8. 8. The automatic press-fit testing mechanism for the pump stator and the rotor according to claim 1, wherein a displacement sensor is further arranged on the frame and used for detecting the axial position of the rotor (13) after press-fitting is completed.
  9. 9. A pump stator and rotor automatic press-fit test method employing the pump stator and rotor automatic press-fit test mechanism according to any one of claims 1 to 8, characterized by comprising the steps of: S1, respectively placing a pump body (11) and a rotor (13) on a tooling base of a material positioning module (1), and conveying the material positioning module (1) to a material taking position through a mobile conveying module (2); s2, in a material taking position, a material taking and carrying module (3) grabs a rotor (13), and a material positioning module (1) is conveyed to a press mounting position by a mobile conveying module (2); S3, in the press-fitting position, the material taking and carrying module (3) places the rotor (13) in the pump body (11), the lower jacking unit (41) and the upper press-fitting unit (42) of the middle press-fitting module (4) clamp the pump body (11) from the upper end and the lower end and perform centering correction, and an elastic pressure head at the tail end of the upper press-fitting unit (42) presses the pump cover (12) on the pump body (11); s4, the movable conveying module (2) conveys the pressed components to a test position along with the material positioning module (1); S5, at a test position, controlling the combined test module (5) to form a current test loop, driving the rotor (13) to rotate, detecting the rotation torque through the torque sensor (53) to judge whether clamping stagnation exists, and detecting the reverse electromotive force through the voltage sensor to evaluate the assembly quality.
  10. 10. The automatic press-fitting test method of the pump stator and the rotor according to claim 9, wherein the step S4 and the step S5 further comprise a press-fitting displacement detection step of detecting the axial position of the rotor (13) after press-fitting by using a displacement sensor so as to assist in judging whether the press-fitting is in place.

Description

Automatic press-fit testing mechanism for pump stator and rotor Technical Field The invention belongs to the technical field of automatic assembly and testing, and particularly relates to an automatic press-fitting testing mechanism for a pump stator and a pump rotor. Background In the manufacturing process of precise fluid machines such as micropumps, hydraulic pumps and the like, the assembly precision and performance consistency of stator and rotor assemblies directly influence the final quality and reliability of products. At present, manual or semi-automatic modes are generally adopted in the industry for rotor press mounting and testing, and the problems of low centering accuracy, insufficient assembly efficiency, easy position deviation caused by magnetic interference, difficulty in realizing online performance detection and the like exist. Particularly for pump products with permanent magnet rotors, the strong magnetic adsorption force between the rotors and the stators makes the rotors easily incline or positioned inaccurately in the traditional press mounting process, thereby causing defects of poor assembly, operation clamping stagnation or efficiency reduction and the like. Although the existing part of automatic equipment can realize a single press-fitting function, most of the existing part of automatic equipment lacks an effective centering correction mechanism and an integrated test module, and a press-fitting-test closed-loop process cannot be completed in the same tool, so that the process is scattered, the beat is prolonged, and the quality is difficult to trace. Therefore, a full-automatic assembly device capable of realizing integration of high-precision centering, flexible press fitting and online performance test is needed, so as to improve assembly quality, production efficiency and product consistency. Disclosure of Invention The invention aims to provide an automatic press-fit testing mechanism for a pump stator and a pump rotor, which realizes full-automatic precise assembly and online test of a pump body, a rotor and a pump cover through an integrated design, and particularly adopts a lower jacking unit and an upper press-fit unit which are coaxially arranged in a middle press-fit module to synchronously implement clamping and centering correction from the upper end and the lower end of the pump body, thereby effectively overcoming the problem of rotor deflection caused by magnetic force adsorption and further ensuring coaxiality and position precision in the assembly process. The invention adopts the following technical scheme: The automatic press-fitting testing mechanism for the pump stator and the pump rotor comprises a frame, a material positioning module, a movable conveying module, a material taking and carrying module, a centering press-fitting module and a combined test module which are arranged on the frame, wherein the material positioning module is provided with a tool base for placing a pump body and the rotor, the centering press-fitting module comprises a lower jacking unit and an upper press-fitting unit which are coaxially aligned, and the lower jacking unit and the upper press-fitting unit are used for clamping and centering simultaneously from the upper end and the lower end of the pump body so as to overcome offset caused by magnetic force adsorption, and the tail end of the upper press-fitting unit is provided with an elastic pressure head for adsorbing and pressing a pump cover. According to the invention, the material positioning module, the mobile conveying module, the material taking and carrying module, the medium-pressure mounting module and the combined mounting test module are integrated on the same frame, so that the full-flow automatic operation from the feeding positioning, conveying, material taking and carrying of the pump body and the rotor and the medium-pressure mounting to the performance test is realized, the assembly efficiency and the production beat are obviously improved, and the automatic continuous production is realized. Particularly, the centering press-fitting module can simultaneously perform centering clamping from the upper end and the lower end of the pump body through the lower jacking unit and the upper press-fitting unit which are coaxially aligned, so that the offset problem caused by the magnetic attraction between the rotor and the pump body is effectively solved, the coaxiality and the precision of the assembly process are ensured, and the centering difficulty in the traditional press-fitting process is solved. Meanwhile, the tail end of the upper press fitting unit is provided with an elastic pressure head for adsorbing and pressing in the pump cover, the structure not only realizes reliable adsorption and automatic pressing in of the pump cover, but also adapts to assembly tolerance through elastic floating design, avoids part damage possibly caused by rigid press fitting, and further improves assembly quality and relia