A device for testing the pull force of a self-adhesive rotor segment
Patent Information
- Application Number
- CN202522064321.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-25
- Publication Date
- 2026-10-27
- Estimated Expiration
- 2035-09-25
AI Technical Summary
[0004]传统胶带测试法虽然操作简便，仅需5分钟即可完成测试，但当铁芯粘接力超过胶带粘附强度时，往往出现胶带脱落而铁芯未被拉开的状况，导致无法准确测量实际粘接强度
[0018]由于上述技术方案运用，本实用新型与现有技术相比具有下列优点：本实用新型提供了一种测试自粘胶定转子切块拉力装置，其通过锁紧机构设计实现了对自粘胶定转子切块的快速可靠固定，既克服了传统胶带测试法粘附力不足的缺陷，又避免了增强型胶水固定法耗时过长的弊端；采用上下固定板配合锁紧组件的结构设计，能够在不使用任何粘接剂的情况下实现对待测铁芯的机械式夹持，测试准备时间缩短至5分钟以内，大幅提高了测试效率；上下固定板面积大于铁芯的设计确保了受力均匀，避免了应力集中导致的测试误差；可调节的锁紧组件能够适应不同尺寸的铁芯试样，提高了装置的通用性；导柱结构的引入保证了测试过程中上下固定板的平行度，使拉力测试数据更加准确可靠；整体结构简单紧凑，操作便捷，既满足了实验室精确测量的需求，也适用于生产现场的快速检测。
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Abstract
Description
Technical Field
[0001] This utility model relates to a device for testing the tensile strength of self-adhesive stator and rotor cutting blocks. Background Technology
[0002] With the increasing demands on motor performance, self-adhesive stator and rotor cores are being used more and more widely in motor manufacturing. These cores achieve a strong bond between laminations through an adhesive layer, and the bonding strength directly affects the motor's operational reliability and service life.
[0003] Currently, the industry mainly uses two methods for tensile testing of self-adhesive stator and rotor blocks: the traditional tape test method and the reinforced adhesive fixing method.
[0004] Although the traditional tape test method is simple to operate and can be completed in just 5 minutes, when the adhesive force of the iron core exceeds the adhesive strength of the tape, the tape often falls off without the iron core being pulled apart, making it impossible to accurately measure the actual adhesive strength.
[0005] The reinforced adhesive fixing method uses high-strength adhesive to bond the iron core to the test fixture. Although it can withstand significant tensile forces, it requires multiple steps, including adhesive application, heating and curing, and cooling. The entire testing process takes more than 6 hours, which not only severely impacts testing efficiency but also increases labor costs and equipment downtime. Furthermore, the cleaning process after the adhesive has cured is quite tedious, and residual adhesive may affect the accuracy of subsequent tests.
[0006] Existing testing methods struggle to balance testing efficiency and testing capability, creating an urgent need for a new testing device that can both quickly complete tests and accurately measure the tensile strength of high-bonding-strength iron cores. Utility Model Content
[0007] The technical problem to be solved by this utility model is to provide a device for testing the tensile strength of self-adhesive stator and rotor cutting blocks.
[0008] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a testing device for the tensile strength of self-adhesive stator and rotor cutting blocks, comprising: an upper fixing plate connected to the upper clamp of a tensile testing machine; a lower fixing plate connected to the lower clamp of a tensile testing machine; and a locking mechanism disposed between the upper fixing plate and the lower fixing plate for locking and fixing the iron core to be tested between the upper fixing plate and the lower fixing plate.
[0009] In some embodiments, the upper surface of the upper fixing plate is connected to the upper clamp of the tensile testing machine by double-sided adhesive, and the planar area of the upper and lower surfaces of the upper fixing plate is larger than the area of the upper and lower surfaces of the iron core; the lower surface of the lower fixing plate is connected to the lower clamp of the tensile testing machine by double-sided adhesive, and the planar area of the upper and lower surfaces of the lower fixing plate is larger than the area of the upper and lower surfaces of the iron core.
[0010] In some embodiments, the locking mechanism includes an upper locking assembly for fixing one end of the iron core to be tested to the upper fixing plate and a lower locking assembly for locking the other end of the iron core to be tested to the lower fixing plate.
[0011] In some embodiments, the upper fixing plate has an upper receiving hole in the middle to accommodate one end of the iron core to be tested, and the upper locking assembly includes an upper pressure head that can press one end of the iron core to be tested into the upper receiving hole, an upper push rod that controls the upper pressure head to move in the horizontal direction, an upper push rod fixing block that fixes the position of the upper push rod, and screws that fix the upper push rod fixing block to the upper fixing plate.
[0012] In some embodiments, the lower fixing plate has a lower receiving hole in the middle to accommodate the other end of the iron core to be tested. The lower locking assembly includes a lower pressing head that can press the other end of the iron core to be tested into the lower receiving hole, a lower push rod that controls the lower pressing head to move in the horizontal direction, a lower push rod fixing block that fixes the position of the lower push rod, and a screw that fixes the lower push rod fixing block to the lower fixing plate.
[0013] In some embodiments, the locking mechanism further includes two guide posts vertically disposed between the upper fixed plate and the lower fixed plate, the two guide posts being fixed to the lower fixed plate by locking pins.
[0014] In some embodiments, the length and width of the upper fixing plate and the lower fixing plate are 140mm-160mm.
[0015] In some embodiments, the upper receiving hole has a length of 29mm-31mm and a width of 24mm-26mm, and the lower receiving hole has a length of 29mm-31mm and a width of 24mm-26mm.
[0016] In some embodiments, the corners of the upper and lower accommodating holes are provided with fan-shaped grooves that extend vertically.
[0017] The scope of this utility model is not limited to technical solutions formed by specific combinations of the above-mentioned technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-mentioned technical features or their equivalent features. For example, technical solutions formed by substituting the above-mentioned features with (but not limited to) technical features with similar functions disclosed in this application.
[0018] Due to the application of the above technical solutions, this utility model has the following advantages compared with the prior art: This utility model provides a device for testing the tensile strength of self-adhesive stator and rotor blocks. Its locking mechanism design enables rapid and reliable fixing of the self-adhesive stator and rotor blocks, overcoming the shortcomings of insufficient adhesion in traditional tape testing methods and avoiding the excessively time-consuming drawbacks of reinforced glue fixing methods. The structural design of upper and lower fixing plates combined with locking components allows for mechanical clamping of the iron core under test without the use of any adhesive, reducing test preparation time to less than 5 minutes and significantly improving testing efficiency. The design of upper and lower fixing plates with an area larger than the iron core ensures uniform force distribution, avoiding test errors caused by stress concentration. The adjustable locking components can adapt to iron core samples of different sizes, improving the versatility of the device. The introduction of the guide post structure ensures the parallelism of the upper and lower fixing plates during testing, making the tensile test data more accurate and reliable. The overall structure is simple and compact, and easy to operate, meeting both the needs of precise laboratory measurements and the requirements of rapid testing in production sites. Attached Figure Description
[0019] Appendix Figure 1 A schematic diagram of the structure of the self-adhesive stator and rotor cutting tension device for testing; Appendix Figure 2 A schematic diagram illustrating the interaction between the self-adhesive stator and rotor cutting tensile testing device and the tensile testing machine; Appendix Figure 3 Top view of the self-adhesive stator and rotor cutting tension device for testing; Appendix Figure 4 This is a schematic diagram of the upper fixed plate structure; Appendix Figure 5 This is a schematic diagram of the lower fixed plate structure; Appendix Figure 6 A schematic diagram of the traditional adhesive tape method for measuring pull-out force; The components are as follows: 1. Upper fixing plate; 11. Upper receiving hole; 12. Upper receiving groove; 13. Upper channel; 2. Lower fixing plate; 21. Lower receiving hole; 22. Lower receiving groove; 23. Lower channel; 3. Locking mechanism; 31. Upper pressure head; 32. Upper push rod; 33. Upper push rod fixing block; 34. Lower pressure head; 35. Lower push rod; 36. Lower push rod fixing block; 37. Guide post; 4. Tensile testing machine; 41. Upper clamp; 42. Lower clamp; 5. Iron core. Detailed Implementation
[0020] like Figure 2 The device shown is a test device for testing the tensile strength of self-adhesive stator and rotor cutting blocks, including an upper fixed plate 1 connected to the upper clamp 41 of the tensile testing machine 4, a lower fixed plate 2 connected to the lower clamp 42 of the tensile testing machine 4, and a locking mechanism 3.
[0021] The locking mechanism 3 is located between the upper fixing plate 1 and the lower fixing plate 2, and is used to lock and fix the iron core 5 to be tested between the upper fixing plate 1 and the lower fixing plate 2.
[0022] like Figure 4 As shown, in this embodiment, the upper fixing plate 1 is a square steel plate of 150mm×150mm with a thickness of 15mm. Its upper surface is bonded and fixed to the upper clamp 41 of the tensile testing machine 4 by 3M VHB double-sided tape.
[0023] The upper fixing plate 1 has an upper receiving hole 11 machined in the middle, with dimensions of 30mm long × 25mm wide × 10mm deep, and vertical fan-shaped grooves with a radius of 5mm at the four corners.
[0024] The fan-shaped groove design can effectively avoid right-angle stress concentration and prevent edge damage of the iron core 5 sample due to excessive local stress during locking and testing.
[0025] The fan-shaped groove structure provides a small margin of movement for the iron core 5 sample, facilitating the centering adjustment of the sample during initial positioning and ensuring uniform force distribution during testing. The chamfered space formed by the fan-shaped groove can accommodate any small debris or burrs that may be generated, preventing these impurities from affecting the flatness of the test surface and the accuracy of the test results. In addition, this design can improve the contact state between the indenter and the iron core 5 sample, making the locking force distribution more uniform and improving the repeatability and reliability of the test. The arc transition structure of the fan-shaped groove facilitates processing and manufacturing, while reducing mold wear and extending the service life of the tooling.
[0026] This detailed design takes into account both the accuracy requirements of the test and the convenience of actual operation as well as the durability of the tooling.
[0027] like Figure 5 As shown, the structure of the lower fixing plate 2 is symmetrical to that of the upper fixing plate 1, and the size of its lower receiving hole 21 is exactly the same as that of the upper receiving hole 11. The two are aligned in the vertical direction.
[0028] Traditional adhesive tape methods such as Figure 6 As shown, the iron core 5 is fixed to the upper clamp 41 and lower clamp 42 of the tensile testing machine 4 with adhesive tape. The adhesive contact area is small, and the pull-out force between the iron core 5 and the upper clamp 41 and lower clamp 42 of the tensile testing machine 4 is too large. Only the adhesive tape between the iron core 5 and the upper clamp 41 and lower clamp 42 of the tensile testing machine 4 can be pulled apart. The product itself cannot be pulled apart, so it is impossible to measure the actual pull-out force. If a stronger adhesive is used between the upper and lower ends of the iron core 5 and the tensile testing machine 4, the adhesive application time + heating and curing time will take 2 hours, cooling will take 2 hours, cleaning residual adhesive will take 1 hour, and the heating and cooling in between will take a total of 1 hour. Therefore, compared with the conventional adhesive tape method, it takes 6 more hours to measure the pull-out force, which is too time-consuming.
[0029] In this embodiment, the planar areas of the upper and lower fixing plates 1 and 2 are much larger than those of the upper and lower fixing plates 5. The structural design of the upper and lower fixing plates combined with the locking assembly enables mechanical clamping of the iron core 5 sample without the use of any adhesive, reducing test preparation time to less than 5 minutes and significantly improving test efficiency. The design of the upper and lower fixing plates having larger areas than the iron core 5 ensures uniform force distribution, avoiding test errors caused by stress concentration. By increasing the contact area between the tape and the tensile testing machine 4, tensile force can be measured normally using double-sided tape, with only an additional 3 minutes for tightening the fixture, reducing the measurement time to just 8 minutes.
[0030] like Figure 1 , 3 As shown, the upper locking assembly of the locking mechanism 3 includes: an upper pressure head 31: made of hard alloy, with a size of 28mm×23mm, maintaining a 1mm gap with the upper receiving hole 11; an upper push rod 32: an M6 threaded rod, 50mm in length, with one end threadedly connected to the upper pressure head 31; and an upper push rod fixing block 33: made of aluminum alloy, with an M6 threaded hole, and fixed in the upper receiving groove 12 by an internal hexagon screw.
[0031] The lower locking assembly includes: a lower pressure head 34: made of hard alloy, measuring 28mm × 23mm, with a 1mm gap between it and the lower receiving hole 21; a lower push rod 35: an M6 threaded rod, 50mm in length, with one end threadedly connected to the lower pressure head 34; and a lower push rod fixing block 36: made of aluminum alloy, with an M6 threaded hole, and fixed in the lower receiving groove 22 by an internal hex screw.
[0032] The lower locking assembly is installed in a mirror image of the upper locking assembly. During operation, one end of the iron core 5 is inserted into the upper receiving hole 11, and the upper push rod 32 is rotated to push the upper pressure head 31 to move horizontally until the iron core 5 is pressed; the lower locking assembly fixes the other end of the iron core 5 in the same way.
[0033] The locking mechanism 3 also includes two guide posts 37 vertically positioned between the upper fixed plate 1 and the lower fixed plate 2, which are fixed to the lower fixed plate 2 by locking screws. The two guide posts 37 are 12mm diameter optical axes, vertically mounted on both sides of the lower fixed plate 2, and secured by M8 locking screws. The upper fixed plate 1 has corresponding guide holes; during testing, the guide posts 37 ensure that the upper and lower fixed plates move only in the vertical direction, avoiding measurement errors caused by skewness.
[0034] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.
Claims
1. A device for testing the tensile strength of self-adhesive stator and rotor cutting blocks, characterized in that: include: The upper fixing plate (1) is connected to the upper clamp (41) of the tensile testing machine (4); The lower fixing plate (2) is connected to the lower clamp (42) of the tensile testing machine (4); The locking mechanism (3) is located between the upper fixing plate (1) and the lower fixing plate (2) and is used to lock the iron core (5) to be tested between the upper fixing plate (1) and the lower fixing plate (2).
2. The device for testing the tensile strength of self-adhesive stator and rotor cutting blocks according to claim 1, characterized in that: The upper surface of the upper fixing plate (1) is connected to the upper clamp (41) of the tensile testing machine (4) by double-sided adhesive tape. The planar area of the upper and lower surfaces of the upper fixing plate (1) is greater than the planar area of the upper and lower surfaces of the iron core (5). The lower surface of the lower fixing plate (2) is connected to the lower clamp (42) of the tensile testing machine (4) by double-sided adhesive tape. The planar area of the upper and lower surfaces of the lower fixing plate (2) is greater than the planar area of the upper and lower surfaces of the iron core (5).
3. The device for testing the tensile strength of self-adhesive stator and rotor cutting blocks according to claim 1, characterized in that: The locking mechanism (3) includes an upper locking assembly that fixes one end of the iron core (5) to be tested to the upper fixing plate (1) and a lower locking assembly that locks the other end of the iron core (5) to the lower fixing plate (2).
4. The device for testing the tensile strength of self-adhesive stator and rotor cutting blocks according to claim 3, characterized in that: The upper fixing plate (1) has an upper receiving hole (11) in the middle to accommodate one end of the iron core (5) to be tested. The upper locking assembly includes an upper pressure head (31) that can press one end of the iron core (5) to be tested into the upper receiving hole (11), an upper push rod (32) that controls the upper pressure head (31) to move in the horizontal direction, an upper push rod fixing block (33) that fixes the position of the upper push rod (32), and a screw that fixes the upper push rod fixing block (33) on the upper fixing plate (1).
5. The device for testing the tensile strength of self-adhesive stator and rotor cutting blocks according to claim 4, characterized in that: The lower fixing plate (2) has a lower receiving hole (21) in the middle to accommodate the other end of the iron core (5) to be tested. The lower locking assembly includes a lower pressing head (34) that can press the other end of the iron core (5) to be tested into the lower receiving hole (21), a lower push rod (35) that controls the lower pressing head (34) to move in the horizontal direction, a lower push rod fixing block (36) that fixes the position of the lower push rod (35), and a screw that fixes the lower push rod fixing block (36) on the lower fixing plate (2).
6. The device for testing the tensile strength of self-adhesive stator and rotor cutting blocks according to claim 5, characterized in that: The upper fixing plate (1) has an upper receiving groove (12) at its edge to accommodate the upper push rod fixing block (33). An upper channel (13) is provided between the upper receiving groove (12) and the upper receiving hole (11). The upper push rod (32) can pass through the upper channel (13) and be fixedly connected to the upper pressure head (31). The lower fixing plate (2) has a lower receiving groove (22) at its edge to accommodate the lower push rod fixing block (36). A lower channel (23) is provided between the lower receiving groove (22) and the lower receiving hole (21). The lower push rod (35) can pass through the lower channel and be fixedly connected to the lower pressure head (34).
7. The device for testing the tensile strength of self-adhesive stator and rotor cutting blocks according to claim 3, characterized in that: The locking mechanism (3) further includes two guide posts (37) vertically arranged between the upper fixing plate (1) and the lower fixing plate (2), and the two guide posts (37) are fixed to the lower fixing plate (2) by locking pins.
8. The device for testing the tensile strength of self-adhesive stator and rotor cutting blocks according to claim 2, characterized in that: The upper fixing plate (1) and the lower fixing plate (2) are 140mm-160mm in length and width.
9. The device for testing the tensile strength of self-adhesive stator and rotor cutting blocks according to claim 5, characterized in that: The upper accommodating hole (11) has a length of 29mm-31mm and a width of 24mm-26mm, and the lower accommodating hole (21) has a length of 29mm-31mm and a width of 24mm-26mm.
10. The device for testing the tensile strength of self-adhesive stator and rotor cutting blocks according to claim 5, characterized in that: The corners of the upper accommodating hole (11) and the lower accommodating hole (21) are provided with fan-shaped grooves that extend vertically.