Structure for testing pressure between iron core sheets

Abstract

The utility model discloses a structure for testing the pressure between iron core sheets, the structure for testing the pressure between the iron core sheets comprises a pressure applying assembly, a plurality of measuring modules and two punching sheets, the axial outer side of each punching sheet is provided with the pressure applying assembly, and the plurality of measuring modules are respectively arranged between the two punching sheets; the measuring module comprises an upper mounting plate, a lower mounting plate and a pressure sensor, the upper mounting plate and the lower mounting plate are respectively abutted against one punching sheet, and the pressure sensor is fixed between the upper mounting plate and the lower mounting plate. According to the structure, the plurality of measuring modules are arranged between the two punching sheets, namely, the pressure sensors are arranged between the upper mounting plate and the lower mounting plate, so that the pressure state of each position between the punching sheets in the whole laminating process can be measured, the measuring result is not influenced by buckling deformation of an applying assembly, the measuring error is small, and the result is accurate and reliable. After the rib plates are welded on the peripheral sides of the punching sheets, the pressure sensors can also measure the pressure value between the punching sheets, and the multiple pressure sensors can measure the pressure distribution between the welded punching sheets.

Description

Technical Field

[0001] The present application relates to the technical field of monitoring the core stacking pressure of traction motors, and in particular to a structure for testing the pressure between core sheets. Background Art

[0002] The rapid development of rail transit has placed higher demands on the reliability of traction motors. The motor core is one of the motor's key components, and the core lamination process is a key step in the motor manufacturing process. The lamination quality has a significant impact on the safe operation of the motor.

[0003] Currently, the pressure between core laminations is tested as follows: a dial indicator is fixed to the press table with the pointer close to the pressure ring. The press then gradually applies pressure to the laminated core. The dial indicator readings (representing the core compression) at different lamination pressures are recorded, and a lamination pressure-core compression curve is plotted. After the shaft is shrunk or the ribs are welded, the remaining core compression is measured. The pressure between the laminations is then calculated based on the lamination pressure-core compression curve.

[0004] In the above-mentioned method for testing the pressure between core laminations, the warping deformation of the pressing ring during the lamination process will introduce a large measurement error; and the distribution of the pressure between the core laminations cannot be measured. Utility Model Content

[0005] The utility model provides a structure for testing the pressure between core sheets, so as to solve the technical problems in the prior art of large pressure measurement error between core sheets and inability to measure the pressure distribution between core sheets.

[0006] In order to achieve the above-mentioned purpose, the technical solution provided by the present utility model is as follows:

[0007] The utility model provides a structure for pressure testing between core sheets, including a pressure-applying assembly, a plurality of measuring modules and two punching sheets, wherein the pressure-applying assembly is arranged on the axial outer side of each punching sheet, and the plurality of measuring modules are respectively arranged between the two punching sheets; the measuring module includes an upper mounting plate, a lower mounting plate and a pressure sensor, the upper mounting plate and the lower mounting plate are respectively in contact with one of the punching sheets, and the pressure sensor is fixed between the upper mounting plate and the lower mounting plate.

[0008] Furthermore, the plurality of measuring modules are evenly distributed between the two punching sheets.

[0009] Furthermore, the plurality of measuring modules are arranged in a ring shape between the two punching sheets, and the arrangement area includes an inner ring area, a middle ring area and an outer ring area. The inner ring area, the middle ring area and the outer ring area are respectively divided into a plurality of sector-shaped areas, and a measuring module is set in each sector-shaped area.

[0010] Furthermore, the inner ring area, the middle ring area, and the outer ring area are evenly divided into 8 to 16 sector-shaped areas respectively.

[0011] Furthermore, the pressure-applying assembly includes a hydraulic press and a template, and the structure for pressure testing between core sheets also includes a tooth pressure plate and a pressure ring. The tooth pressure plate, the pressure ring and the template are sequentially arranged on both axial sides of the punching sheet, and the hydraulic press applies pressure on the template above; the junction of the inner ring area and the middle ring area is located at the inner circle boundary of the pressure ring.

[0012] Furthermore, the measurement module also includes a digital transmitter, and the structure for testing the pressure between core sheets also includes a data collector. Each of the pressure sensors is electrically connected to one of the digital transmitters, and the digital transmitters are all electrically connected to the data collector.

[0013] The utility model provides a structure for testing the pressure between core sheets, in which multiple measuring modules are arranged between two punching sheets, and the measuring modules include an upper mounting plate and a lower mounting plate respectively abutting against the punching sheets, and a pressure sensor is arranged between the upper mounting plate and the lower mounting plate, which can measure the pressure state between the punching sheets during the entire stacking process, with small measurement error and accurate and reliable results; in addition, after the ribs are welded on the sides of the punching sheets, the pressure sensor can also measure the pressure value between the punching sheets, and multiple pressure sensors can measure the pressure distribution between the punching sheets after welding; after the template is separated from the core in the demolding process, the pressure between the core punching sheets can be measured to ensure that the pressure between the core sheets meets the stacking quality requirements and ensure the safe operation of the traction motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 This is a schematic structural diagram of a structure for testing pressure between core sheets in an embodiment of the present invention;

[0016] Figure 2 for Figure 1 Schematic diagram of the pressure sensor arrangement area.

[0017] Reference numerals:

[0018] 10. Develop the film;

[0019] 21. Upper mounting plate; 22. Lower mounting plate; 23. Pressure sensor;

[0020] 23a, inner ring area; 23b, middle ring area; 23c, outer ring area;

[0021] 31. Pressing ring; 32. Tooth pressure plate. DETAILED DESCRIPTION

[0022] In order to help those skilled in the art better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making any creative efforts shall fall within the scope of protection of this application.

[0023] It should be noted that when an element is referred to as being “fixed on” or “set on” another element, it can be directly on the other element or indirectly set on the other element; when an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0024] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0025] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of technical features indicated. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout the description of this application, "plurality" or "several" means two or more, unless otherwise specifically defined.

[0026] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the conditions under which this application can be implemented. Therefore, they have no substantive technical significance. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in this application without affecting the efficacy and purpose that can be achieved by this application.

[0027] like Figure 1As shown, an embodiment of the present application provides a structure for pressure testing between core sheets, including a pressure component, multiple measuring modules and two punching sheets 10, multiple measuring modules are arranged between the two punching sheets 10, and a pressure component is arranged on the axial outer side of each punching sheet 10; the measuring module includes an upper mounting plate 21, a lower mounting plate 22 and a pressure sensor 23, the upper mounting plate 21 and the lower mounting plate 22 are respectively abutted against a punching sheet 10, and the pressure sensor 23 is fixed between the upper mounting plate 21 and the lower mounting plate 22.

[0028] In the present application, refer to Figure 1 The upper mounting plate 21 abuts against the punching sheet 10 above the core, and the lower mounting plate 22 abuts against the punching sheet 10 below the core. The pressure sensor 23 is fixed between the upper mounting plate 21 and the lower mounting plate 22. The upper mounting plate 21, the pressure sensor 23, and the lower mounting plate 22 can be separate structures or integral structures. Pressure components are provided on the axially outer sides of the punching sheets 10, i.e., above the punching sheet 10 above the core and below the punching sheet 10 below the core.

[0029] The structure for testing the pressure between the core sheets of the embodiment of the present application is provided with multiple measuring modules between the two punching sheets 10, and the measuring modules include an upper mounting plate 21 and a lower mounting plate 22 respectively abutting against the punching sheets 10, and a pressure sensor 23 is provided between the upper mounting plate 21 and the lower mounting plate 22, which can measure the pressure state between the punching sheets 10 during the entire stacking process, with small measurement error and accurate and reliable results; in addition, after the ribs are welded on the sides of the punching sheets 10, the pressure sensor 23 can also measure the pressure value between the punching sheets 10, and multiple pressure sensors 23 can measure the pressure distribution between the punching sheets 10 after welding; after the template is separated from the core in the demolding process, the pressure between the core punching sheets 10 can be measured to ensure that the pressure between the core sheets meets the stacking quality requirements and ensure the safe operation of the traction motor.

[0030] In some embodiments, multiple measurement modules are evenly distributed between two punching sheets 10. It is understandable that the evenly distributed multiple pressure sensors 23 can simultaneously measure the inter-sheet pressure in various areas between the punching sheets 10, and provide more accurate inter-sheet pressure distribution information.

[0031] In other embodiments, multiple measurement modules are arranged in a ring shape between two punching sheets 10, and the arrangement area includes an inner ring area 23a, a middle ring area 23b and an outer ring area 23c. The inner ring area 23a, the middle ring area 23b and the outer ring area 23c are respectively divided into multiple sector-shaped areas, and a measurement module is set in each sector-shaped area.

[0032] In the present application, refer to Figure 2, the area between the two punching sheets 10 is divided into an annular area. The annular area is in the horizontal plane, perpendicular to the axial direction of the punching sheet and is divided into an inner annular area 23a, a middle annular area 23b and an outer annular area 23c from the inside to the outside. Measurement modules are installed in the above areas respectively, which can measure the inter-sheet pressure at different positions in the radial direction and analyze the distribution of pressure in the radial direction; each of the above areas is divided into multiple sector-shaped areas, and a measurement module is installed in each sector-shaped area. It can measure the inter-sheet pressure at different positions in the same radial direction, which can be used to analyze the inter-sheet pressure distribution in the same radial direction.

[0033] By setting the arrangement area of ​​the measurement modules, the inter-sheet pressure measurement results can be unaffected by the warping of the pressure-applying components, reducing measurement errors. In addition, the pressure sensor 23 can measure the inter-sheet pressure in real time, with a simple measurement process, intuitive results, and high efficiency.

[0034] Furthermore, the inner ring region 23a, the middle ring region 23b, and the outer ring region 23c are each evenly divided into 8 to 16 sectors. Understandably, too few sectors will affect the determination of the inter-slice pressure distribution in the same radial direction. Eight sectors encompass eight different radial measurement results. Too many sectors, due to the limited area, will cause mutual influence between measurement modules, leading to inaccurate test results.

[0035] In some embodiments, the pressure-applying assembly includes a hydraulic press and a template, and the structure for pressure testing between core sheets also includes a pressure ring 31 and a tooth pressure plate 32. The tooth pressure plate 32, the pressure ring 31 and the template are sequentially arranged on both axial sides of the punching sheet 10, and the hydraulic press applies pressure on the upper template; the junction of the inner ring area 23a and the middle ring area 23b is located at the inner circle boundary of the pressure ring 31.

[0036] Reference Figure 1 In the axial direction of the punch 10, the template (not shown), pressure ring 31, tooth pressure plate 32, punch 10, measurement module, punch 10, tooth pressure plate 32, pressure ring 31, and template are stacked in order from bottom to top. A hydraulic press is placed on the upper template, and oil pressure is applied through the upper template. The pressure sensor 23 can measure the inter-plate pressure under different stacking parameters. Furthermore, the inner ring area 23a and the middle ring area 23b are separated by the inner circle of the pressure ring 31. The pressure sensor 23 in the inner ring area 23a primarily measures the inter-plate pressure in the teeth of the punch 10. The middle ring area 23b and the outer ring area 23c are the yoke areas, and the pressure sensors 23 in these two areas are used to measure the inter-plate pressure in the yoke of the punch 10. Each annular area is divided into 8 to 16 sectors, and the inter-plate pressure in each sector can be measured separately.

[0037] In some embodiments, the measurement module further includes a digital transmitter, and the structure for testing the pressure between core laminations further includes a data collector. Each pressure sensor 23 is electrically connected to a digital transmitter, and each digital transmitter is electrically connected to the data collector. In the embodiment of the present application, a digital transmitter is configured in each sector where the pressure sensor 23 is located, and the number of digital transmitters is the same as the number of pressure sensors 23. The aforementioned multiple digital transmitters are then electrically connected to the data collector, which transmits the collected data to a signal receiving terminal, such as a mobile phone or computer, to achieve real-time display of the inter-lamination pressure and simultaneously record the load.

[0038] The method for testing the pressure between core laminations according to an embodiment of the present application is applied to the above-mentioned structure for testing the pressure between core laminations, and includes the following steps:

[0039] The stacking pressure component, the punching sheet 10 and multiple measuring modules apply pressure to the punching sheet 10, and the pressure sensor 23 measures the pressure value at each position between the punching sheets 10 in real time; the pressure is released to retain the stacking pressure between the punching sheets 10, and the ribs are welded on the peripheral side of the punching sheet 10, and the pressure sensor 23 measures the pressure value at each position between the punching sheets 10 after the ribs are welded.

[0040] The inter-lamina pressure testing method in the embodiment of the present application can measure the data and distribution of inter-lamina pressure under different lamination parameters in real time, can also measure the inter-lamina pressure distribution after the ribs are welded around the punching plate 10, and can also measure the final inter-lamina pressure after the template is separated from the core. The above-mentioned testing method can provide a basis for the matching of the lamination and welding process parameters with the frame structure, and provide optimization direction for the misalignment and protrusion of the punching plate 10 caused by abnormally large inter-lamina pressure in the outer ring area 23c due to welding shrinkage.

[0041] Furthermore, the above steps also include separating the pressure-applying assembly from the core after welding the ribs, ensuring that the pressure sensor 23 measures 2 to 3 MPa. After separating the template from the core, the pressure sensor 23 must maintain the pressure within this range to meet the requirements of the core lamination process, thereby ensuring the lamination quality of the core and the safe operation of the traction motor.

[0042] In the embodiment of the present application, the area S of the punching sheet 10 corresponding to the inner ring area 23a is N , the middle ring area 23b corresponds to the area S of the punching sheet 10 Z , the outer ring area 23c corresponds to the area S of the punching sheet 10 W The average pressure of the lamination process is P. The welding shrinkage increases the average pressure to 2 to 4 times the original pressure. The nominal range of the sensor is S. W * (2~4) P / 16, safe overload 1.2MPa, ultimate overload 2.2MPa.

[0043] By using the above-mentioned method for testing the pressure between core sheets, it is possible to determine the pressure that the hydraulic press needs to apply when the requirements of the core lamination process are met, thereby fixing the various parameters of the lamination process, making the core lamination process more reliable and ensuring the lamination quality.

[0044] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A structure for testing pressure between core laminations, characterized by: It includes a pressure-applying component, multiple measuring modules and two punching sheets. The pressure-applying component is arranged on the axial outer side of each punching sheet, and the multiple measuring modules are respectively arranged between the two punching sheets; the measuring module includes an upper mounting plate, a lower mounting plate and a pressure sensor. The upper mounting plate and the lower mounting plate are respectively in contact with one of the punching sheets, and the pressure sensor is fixed between the upper mounting plate and the lower mounting plate.

2. The structure for testing pressure between core sheets according to claim 1, wherein: The plurality of measuring modules are evenly distributed between the two punching sheets.

3. The structure for testing pressure between core sheets according to claim 1, wherein: The multiple measuring modules are arranged in a ring shape between the two punching sheets, and the arrangement area includes an inner ring area, a middle ring area and an outer ring area. The inner ring area, the middle ring area and the outer ring area are respectively divided into multiple sector-shaped areas, and a measuring module is set in each sector-shaped area.

4. The structure for testing pressure between core sheets according to claim 3, wherein: The inner ring area, the middle ring area, and the outer ring area are evenly divided into 8 to 16 sector-shaped areas respectively.

5. The structure for testing pressure between core sheets according to claim 3, wherein: The pressure-applying assembly includes a hydraulic press and a template, and the structure for pressure testing between core sheets also includes a tooth pressure plate and a pressure ring. The tooth pressure plate, the pressure ring and the template are sequentially arranged on both axial sides of the punching sheet, and the hydraulic press applies pressure on the template above; the junction of the inner ring area and the middle ring area is located at the inner circle boundary of the pressure ring.

6. The structure for testing pressure between core sheets according to any one of claims 1 to 5, characterized in that: The measurement module further includes a digital transmitter, and the structure for testing the pressure between core sheets further includes a data collector. Each of the pressure sensors is electrically connected to one of the digital transmitters, and the digital transmitters are all electrically connected to the data collector.

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