Straightness detecting and shaping mechanism for rotor iron core magnetic steel groove

Abstract

The invention belongs to the field of motor manufacturing, and particularly relates to a straightness detecting and shaping mechanism for a rotor core magnetic steel groove, which comprises a mounting plate, a magnetic steel groove shaping jig and an end face protection sheet, the magnetic steel groove shaping jig is connected to the mounting plate, the magnetic steel groove shaping jig is arranged between the mounting plate and the end face protection sheet, and the magnetic steel groove shaping jig is of a profiling structure of a magnetic steel groove; the end face protection sheet and the mounting plate are coaxially arranged, and the end face protection sheet is provided with an open hole for a magnetic steel groove shaping jig to pass through. Compared with the prior art, the straightness detecting and shaping mechanism has the advantages that the defects that in the prior art, manual visual detection of the straightness of the magnetic steel groove is inaccurate and low in efficiency, and appropriate equipment automation and batch detection are lacked are overcome; synchronous detection of straightness of each magnetic steel groove of a single rotor core and shaping of the magnetic steel grooves are realized.

Description

Technical Field

[0001] The invention belongs to the field of motor manufacturing, and in particular relates to a straightness detection and shaping mechanism for magnetic steel slots of a rotor core. Background Art

[0002] The magnet is one of the main components of the motor rotor. During the assembly of the permanent magnet rotor, the assembly of the magnet is an important process.

[0003] In the existing insert-type rotor, magnets (magnetic steel sheets) are inserted manually, and whether the magnetic steel slots are deformed or damaged is also pre-checked by manual visual inspection. In order to ensure the operability of the process, it is necessary to confirm whether the surface of the magnetic steel slots is damaged and the straightness of the magnetic steel slots. Otherwise, there will be a risk of the magnetic steel breaking or even breaking in the core, affecting the overall start-up rate of automated production. However, relying solely on manual visual judgment is extremely dependent on the experience of workers, and the detection accuracy and efficiency are low. It is actually difficult to detect slight deformations, which leads to quality problems in the rotor core.

[0004] For example, CN113972800A discloses a motor rotor magnetic steel assembly device and assembly method, the device includes a box body, an operating area is provided in the box body, an operating port is provided on the side of the operating area, a clamp is provided at the bottom of the operating area, the clamp is detachably connected to the operating area, a rotor core is provided on the clamp, the axis of the rotor core is detachably connected to the clamp, a plurality of evenly distributed magnetic steel grooves are provided on the side of the rotor core, a plurality of photoelectric sensors are detachably installed in the operating area, the plurality of photoelectric sensors are evenly distributed in the operating area with the rotor core as the center and correspond one by one to the plurality of magnetic steel grooves, an electric cylinder is provided on the top of the operating area, the electric cylinder is detachably connected to the operating area, a magnetic steel pressing device corresponding to the rotor core is provided on the electric cylinder, a PLC controller is provided in the box body, and the photoelectric sensor and the electric cylinder are electrically connected to the PLC controller. In this solution, the automatic assembly of magnetic steel sheets is solved by the designed assembly device, but the surface of the rotor core and the straightness of the magnetic steel slots are not detected, which may cause spacing and uneven force in the magnetic steel sheets in the magnetic steel slots after assembly, which may easily lead to local defects during use, thereby causing product quality defects.

[0005] Through end face visual inspection, the problem of bad magnetic steel slots on the end face of the core can be effectively detected, but it cannot detect the straightness problem inside the magnetic steel slot of the core, nor can it achieve the purpose of correcting the slight poor straightness of the magnetic steel slot. Therefore, it is necessary to propose an automated, batched, and highly accurate method for the detection of the straightness inside the magnetic steel slot to further avoid the breakage and fragmentation of the magnetic steel sheet and ensure the final product yield. Summary of the invention

[0006] The purpose of the present invention is to solve at least one of the above problems and to provide a straightness detection and shaping mechanism for the magnetic steel slots of the rotor core, so as to address the shortcomings of the prior art that manual visual detection of the straightness of the magnetic steel slots is inaccurate and inefficient, and lacks suitable equipment for automated and batch detection. This scheme designs a straightness detection and shaping mechanism to achieve synchronous detection of the straightness of each magnetic steel slot of a single rotor core and shaping of the magnetic steel slots.

[0007] The purpose of the present invention is achieved through the following technical solutions:

[0008] A straightness detection and shaping mechanism for a rotor core magnetic steel slot, comprising a mounting plate, a magnetic steel slot shaping jig and an end face protection sheet;

[0009] The magnetic steel slot shaping jig is connected to the mounting plate, and the magnetic steel slot shaping jig is arranged between the mounting plate and the end face protection sheet, and the magnetic steel slot shaping jig is a contoured structure of the magnetic steel slot;

[0010] The end face protection sheet is coaxially arranged with the mounting plate, and an opening is provided on the end face protection sheet for the magnetic steel slot shaping fixture to pass through.

[0011] Preferably, the end face protection sheet is connected to the mounting plate via a driving connection.

[0012] Preferably, the driver is a cylinder, the cylinder barrel of the cylinder is mounted on the mounting plate (center), and the piston rod of the cylinder is connected to the center of the end face protection sheet;

[0013] The cylinder contracts so that the end face protection sheet can move axially and fit the surface of the rotor core. The cylinder directly drives the end face protection sheet to move axially relative to the mounting plate.

[0014] Preferably, the surface of the end face protection sheet facing away from the mounting plate is configured to be in a shape that fits the surface of the rotor core. The main function of the end face protection sheet is to protect the surface of the rotor core and prevent it from being damaged by impact during the detection and shaping process.

[0015] Preferably, a positioning plug-in is further provided on the surface of the end face protection sheet facing away from the mounting plate, and the positioning plug-in can be inserted into the rivet hole of the rotor core for positioning.

[0016] Preferably, a pressure sensor is also provided on the surface of the end face protection sheet facing away from the mounting plate, and whether the end face of the rotor core is deformed is determined by the magnitude of the pressure under the end face protection sheet.

[0017] Preferably, the magnetic steel slot shaping jig is threadedly connected to the mounting plate.

[0018] Preferably, the straightness detection and shaping mechanism further comprises an outer diameter ring gauge, which is coaxially arranged with the mounting plate and the end face protection sheet, and is arranged on the extension line of the connecting line of the mounting plate and the end face protection sheet. The outer diameter ring gauge limits the rotor core so that positioning can be completed quickly when pressing down, avoiding misalignment, slippage, etc.

[0019] Preferably, the inner wall surface of the outer diameter ring gauge is configured to be in a shape that fits the side wall surface of the rotor core.

[0020] Preferably, the outer diameter ring gauge is provided with at least one access opening, the access opening is arranged along the axial direction, and the access opening is connected to the surface of the outer diameter ring gauge facing the mounting plate. By setting the access opening, the rotor core can be conveniently placed in and taken out.

[0021] The working principle of the present invention is:

[0022] After placing the rotor core at the inspection position, press down the end face protection sheet so that it fits tightly against the surface of the rotor core, and then press down the magnetic steel slot shaping jig so that the magnetic steel slot shaping jig passes through the end face protection sheet and enters the magnetic steel slot of the rotor core for inspection and shaping.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] In the prior art, there is no equipment for automatically detecting and shaping the straightness of the magnetic steel slots of the insert-type rotor. The straightness detection and shaping mechanism proposed in this scheme can be processed efficiently, accurately, automatically and in batches, effectively solving the problems of detecting and shaping the straightness of the magnetic steel slots in the magnetic sheet rotor and the problems of downstream automated inserting and operating rate.

[0025] The straightness detection and shaping mechanism of this scheme not only achieves the purpose of magnetic steel slot straightness detection and shaping, but also presses the surface of the rotor core to ensure that the core will not be pulled up or deformed due to the movement of the magnetic steel slot shaping fixture. The outer diameter ring gauge is used to prevent its outer diameter from protruding beyond the outer diameter of the rotor, effectively protecting the shape of the rotor core, thereby achieving the purpose of improving the production line operation rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the straightness detection and shaping mechanism in this scheme;

[0027] Figure 2 It is a schematic diagram of a magnetic steel slot straightness detection method in the prior art;

[0028] In the figure: 1-mounting plate; 2-magnetic steel slot shaping fixture; 3-end face protection sheet; 4-outer diameter ring gauge; 5-drive. DETAILED DESCRIPTION

[0029] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 2 As shown in the figure, this is a non-visual inspection method for the straightness of the magnetic steel slots of the rotor core in the prior art. It is very time-consuming and labor-intensive to insert and calibrate each magnetic steel slot by manually holding a magnetic steel slot profiling piece. In addition, since the rotor core is a rotationally symmetrical structure, it is very easy to miss inspections and re-inspections. The overall inspection cycle is long and the efficiency is low, resulting in the difficulty in meeting the requirements of automated mass production in terms of inspection reliability and efficiency.

[0031] Example

[0032] A straightness detection and shaping mechanism for rotor core magnetic steel slots, such as Figure 1 As shown, it includes a mounting plate 1, a magnetic steel slot shaping fixture 2 and an end surface protection sheet 3;

[0033] The magnetic steel slot shaping jig 2 is connected to the mounting plate 1, and the magnetic steel slot shaping jig 2 is arranged between the mounting plate 1 and the end face protection sheet 3, and the magnetic steel slot shaping jig 2 is a profiling structure of the magnetic steel slot;

[0034] The end surface protection sheet 3 is coaxially arranged with the mounting plate 1 , and an opening is provided on the end surface protection sheet 3 for the magnetic steel slot shaping fixture 2 to pass through.

[0035] More specifically, in this embodiment:

[0036] The straightness detection and shaping mechanism is composed of a mounting plate 1, an outer diameter ring gauge 4, a magnetic steel groove shaping fixture 2 and an end face protection sheet 3. Figure 1 , wherein the mounting plate 1 , the end face protection sheet 3 and the outer diameter ring gauge 4 are sequentially arranged on the same axis to form a coaxial arrangement, and the magnetic steel slot shaping fixture 2 is arranged between the mounting plate 1 and the end face protection sheet 3 .

[0037] The magnetic steel slot shaping jig 2 is arranged in a manner corresponding to the magnetic steel slot of the rotor core, and is installed on the mounting plate 1 by screws, and moves with the mounting plate 1; the end face protection sheet 3 is connected to the mounting plate 1 through the drive 5. Specifically, the drive 5 is a cylinder, and the cylinder body of the cylinder can be installed at the center of the mounting plate 1, and the end of the piston rod of the cylinder is connected to the center of the end face protection sheet 3. In addition, the cylinder as a whole is also perpendicular to the end face protection sheet 3 and the mounting plate 1. The three together form an "I"-shaped structure, and then when the cylinder is extended or retracted, the end face protection sheet 3 actually moves in the axial direction to ensure that it is always in a parallel state with the outer diameter ring gauge 4 (after the rotor core is placed in the outer diameter ring gauge 4, the end face protection sheet 3 can be kept parallel to the rotor core).

[0038] The end face protection sheet 3 is provided with openings corresponding to the magnetic steel slot shaping jig 2 and the magnetic steel slot of the rotor core, and the openings can allow the magnetic steel slot shaping jig 2 to pass through to allow it to enter the magnetic steel slot of the rotor core. The side surface of the end face protection sheet 3 facing away from the mounting plate 1, that is, the side surface facing the rotor core (called the outer surface), matches the shape of the upper surface of the rotor core, and is generally a horizontal surface, so that the end face protection sheet 3 can be tightly fitted and pressed against the surface of the rotor core after being pressed down. Further, a positioning plug-in is provided on the outer surface of the end face protection sheet 3, which matches the rivet hole of the rotor core to achieve downward positioning; a plurality of positioning plug-ins can be provided correspondingly, such as inserts, inserts, and other structural forms. In addition, a pressure sensor can also be provided on the outer surface of the end face protection sheet 3. By measuring the pressure of the end face protection sheet 3 that is tightly fitted to the surface of the rotor core after pressing, it can be determined whether there are problems such as misalignment and deformation on the surface of the rotor core.

[0039] The outer diameter ring gauge 4 is a ring column structure, and the rotor core can be placed inside it to limit its position during inspection and shaping. The inner side wall of the outer diameter ring gauge 4 corresponds to the rotor core, and is generally circular, so that the rotor core cannot move horizontally after being placed inside the outer diameter ring gauge 4, further ensuring the accurate positioning and insertion of the mounting plate 1 after being pressed down, and will not damage the rotor core itself. On the side wall surface of the outer diameter ring gauge 4, there is an axially extending access port, which is arranged in multiple intervals along the circumference of the outer diameter ring gauge 4, and one end of the access port is connected to the upper surface of the outer diameter ring gauge 4, so that the rotor core can be conveniently placed and taken out through the access port.

[0040] The equipment installed in this mechanism has at least a lower pressing plate that can be pressed down vertically and a fixed lower supporting plate. The mounting plate 1 is arranged on the lower surface of the lower pressing plate, the drive 5 is fixed on the lower pressing plate, and the outer diameter ring gauge 4 is installed on the upper surface of the lower supporting plate. When in use, the rotor core to be inspected and shaped is first placed in the outer diameter ring gauge 4, and then the cylinder piston rod is extended to drive the end face protection sheet 3 to be pressed down to fit tightly against the surface of the rotor core. At this time, the positioning plug-in is synchronously positioned with the rivet hole of the rotor core, and then the lower pressing plate drives the magnetic steel slot shaping jig 2 to be pressed down, so that the magnetic steel slot shaping jig 2 passes through the opening on the end face protection sheet 3 to enter the magnetic steel slot of the rotor core, and the piston rod of the cylinder retracts into the cylinder body, and the magnetic steel slot shaping jig 2 detects and shapes the straightness of the magnetic steel slot. After the shaping process is completed, the process will be stressed, and the rotor core may have a certain deformation. After the inspection and shaping is completed, the cylinder piston rod extends, the lower pressure plate is lifted, the magnetic steel slot shaping fixture 2 withdraws from the rotor core, and the end face protection sheet 3 protects the rotor core from quality defects such as core warping caused by the removal of the magnetic steel shaping fixture 2; then the rotor core in the outer diameter ring gauge 4 can be taken out for subsequent processes and the next round of inspection.

[0041] This mechanism has a high degree of automation and precision in the process. It can detect all magnetic steel slots of a rotor core at the same time, and can detect the problem of misalignment and deformation at the same time. At the same time, it can also prevent the rotor core from being pulled up and deformed during the detection process. Compared with conventional visual and manual inspections, the efficiency is greatly improved, and the product quality can be fully guaranteed, which can further improve the production line operation rate and downstream production rhythm.

[0042] The above description of the embodiments is to facilitate the understanding and use of the invention by those skilled in the art. It is obvious that those skilled in the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the present invention is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the scope of protection of the present invention.

Claims

1. A straightness detection and shaping mechanism for rotor core magnetic steel slots, characterized in that: It comprises a mounting plate (1), a magnetic steel slot shaping jig (2) and an end face protection sheet (3); The magnetic steel slot shaping jig (2) is connected to the mounting plate (1), and the magnetic steel slot shaping jig (2) is arranged between the mounting plate (1) and the end face protection sheet (3), and the magnetic steel slot shaping jig (2) is a profiling structure of the magnetic steel slot; The end face protection sheet (3) is coaxially arranged with the mounting plate (1), and an opening is provided on the end face protection sheet (3) through which the magnetic steel slot shaping jig (2) passes.

2. A straightness detection and shaping mechanism for rotor core magnetic steel slots according to claim 1, characterized in that: The end face protection sheet (3) is connected to the mounting plate (1) via a drive (5).

3. A straightness detection and shaping mechanism for rotor core magnetic steel slots according to claim 2, characterized in that: The drive (5) is a cylinder, the cylinder barrel of the cylinder is mounted on the mounting plate (1), and the piston rod of the cylinder is connected to the center of the end surface protection plate (3).

4. The straightness detection and shaping mechanism for rotor core magnetic steel slots according to claim 1, characterized in that: The surface of the end face protection sheet (3) facing away from the mounting plate (1) is arranged in a shape that fits the surface of the rotor core.

5. The straightness detection and shaping mechanism for rotor core magnetic steel slots according to claim 4, characterized in that: A positioning plug-in is also provided on the surface of the end face protection sheet (3) facing away from the mounting plate (1), and the positioning plug-in can be inserted into the rivet hole of the rotor core for positioning.

6. The straightness detection and shaping mechanism for rotor core magnetic steel slots according to claim 4, characterized in that: A pressure sensor is also provided on the surface of the end face protection sheet (3) facing away from the mounting plate (1).

7. The straightness detection and shaping mechanism for rotor core magnetic steel slots according to claim 1, characterized in that: The magnetic steel groove shaping jig (2) is threadedly connected to the mounting plate (1).

8. The straightness detection and shaping mechanism for rotor core magnetic steel slots according to claim 1, characterized in that: The straightness detection and shaping mechanism also includes an outer diameter ring gauge (4), which is coaxially arranged with the mounting plate (1) and the end face protection plate (3), and the outer diameter ring gauge (4) is arranged on the extension line of the line connecting the mounting plate (1) and the end face protection plate (3).

9. The straightness detection and shaping mechanism for rotor core magnetic steel slots according to claim 8, characterized in that: The inner wall surface of the outer diameter ring gauge (4) is arranged to be in a shape that fits the side wall surface of the rotor core.

10. The straightness detection and shaping mechanism for rotor core magnetic steel slots according to claim 8, characterized in that: The outer diameter ring gauge (4) is provided with at least one access opening, the access opening is arranged along the axial direction, and the access opening is connected to the surface of the outer diameter ring gauge (4) facing the mounting plate (1).

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