Tool clamp for enameled wire detection

Abstract

The utility model relates to a work fixture for enameled wire detection, which comprises a track and a clamping table arranged above the track and driven by a driving mechanism to slide, a clamping groove is arranged in the middle of an inner cavity of the clamping table, and wire harness placing grooves communicated with the clamping groove are respectively arranged on two sides of the clamping table. The utility model relates to the technical field of enameled wire detection. According to the tool clamp for enameled wire detection, a combined positioning groove design is adopted, a wire harness placement groove and a clamping groove form a three-stage positioning system, and due to the differential design that the width of the clamping groove is larger than that of the wire harness placement groove, initial threading convenience is guaranteed, and micron-sized radial positioning is achieved through a narrowing structure of the clamping groove.

Description

Technical Field

[0001] This utility model relates to the field of enameled wire testing technology, specifically a tooling fixture for enameled wire testing. Background Technology

[0002] Enamelled wire, as a core material for winding conductors in electrical equipment, directly affects the safety and service life of electrical equipment due to the uniformity, withstand voltage, and adhesion of its surface insulation layer. In industrial production, enamelled wire requires rigorous online testing processes to ensure quality standards are met. Traditional testing fixtures generally suffer from the following technical limitations:

[0003] (1) Insufficient positioning accuracy: Conventional V-groove or manual clamps are difficult to achieve accurate axial positioning of enameled wire. The wire is prone to lateral displacement during clamping, resulting in a large randomness in the contact position between the detection probe and the wire, which seriously affects the repeatability and reliability of the detection data.

[0004] (2) Low clamping efficiency: The manual threading and locking operation mode is difficult to adapt to the high-speed cycle of modern production lines, especially in the operation of fine-diameter enameled wire (diameter <0.1mm), the wire is prone to bending and deformation;

[0005] (3) Risk of clamping damage: Rigid clamping structures have defects in contact pressure control. Excessive clamping force can easily cause mechanical damage to the insulation layer, while insufficient clamping force can cause wire slippage. Traditional rubber pads are prone to aging and failure.

[0006] (4) Difficulty in tension control: The lack of an online tension adjustment mechanism means that changes in wire tightness during the testing process will introduce additional stress, affecting the detection rate of defects such as microcracks and pinholes in the insulation layer.

[0007] To address the aforementioned issues, this technical solution achieves an organic unity of non-destructive clamping, precise positioning, and dynamic tension adjustment of enameled wires through an innovative pneumatic composite clamping structure and adaptive pressure adjustment mechanism. Utility Model Content

[0008] To address the shortcomings of existing technologies, this utility model provides a tooling fixture for testing enameled wires, which solves the problems mentioned above.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a tooling fixture for testing enameled wire, comprising a track and a clamping platform slidably mounted above the track by a drive mechanism. The clamping platform has a clamping groove in the center of its inner cavity, wire harness placement grooves communicating with the clamping grooves on both sides of the clamping platform, and a side slot communicating with the clamping grooves on the side of the clamping platform. A pressure plate is rotatably connected to the inner cavity of the side slot via a rotating cylinder. Two clamping blocks driven by a double-rod clamping cylinder are slidably connected to the inner cavity of the clamping groove.

[0010] The pressure plate has an inner groove, and a top plate is slidably connected to the inner cavity of the inner groove. A return spring is fixedly connected to the top of the top plate, and the top of the return spring is fixedly connected to the inner cavity of the inner groove. Guide grooves are provided on both sides of the top plate. When clamping the enameled wire, the enameled wire is placed in the clamping groove and the wire harness placement groove. Then, the pressure plate is driven to rotate into the clamping groove by rotating the cylinder. The pressure plate moves downward to squeeze the enameled wire, causing it to move downward. After it has completely moved into place, the enameled wire is located between the two clamping blocks, and then clamped by a double rod. The cylinder drives two clamping blocks to move toward the enameled wire. During the movement, the blocks abut against the guide groove on the side of the top plate. The top plate is then compressed and retracts into the inner groove, and the two clamping blocks directly hold the enameled wire. The tension of the enameled wire can be adjusted by sliding the clamping table on the track for subsequent testing. In use, the enameled wire is simply passed through the wire harness placement slot for automatic clamping and positioning. The clamping accuracy is high, ensuring that the enameled wire is always clamped in a fixed position, thus guaranteeing the stability of the test data. The automatic extension and retraction of the top plate effectively ensures the clamping effect.

[0011] As a further aspect of this invention, the width of the clamping groove is greater than the width of the wire harness placement groove, which can effectively position the enameled wire.

[0012] As a further embodiment of this utility model: when the pressure plate is rotated to the left to its limit, it is located above the two clamping blocks and parallel to the top of the clamping blocks.

[0013] As a further embodiment of this invention: both of the two clamping blocks are covered with a rubber membrane on their opposite sides. The rubber membrane reduces friction and prevents the enameled wire from breaking due to excessive clamping force.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] Precision positioning system

[0016] Combined positioning slot design: The wire harness placement slot and the clamping slot form a three-level positioning system. The differentiated design of the clamping slot width being greater than that of the wire harness placement slot ensures both the convenience of initial wire threading and the achievement of micron-level radial positioning through the narrowing structure of the clamping slot.

[0017] Pneumatic coordinated clamping: After the rotating cylinder drives the pressure plate to complete the pre-clamping and positioning, the double-rod clamping cylinder drives the symmetrical clamping blocks to perform closed-loop clamping, and the repeatability of the positioning accuracy can reach ±0.02mm;

[0018] Adaptive clamping protection

[0019] Dynamic pressure compensation mechanism: The guide groove of the top plate and the return spring form a nonlinear stiffness system. The contact force is buffered by the sliding of the inclined surface at the moment of contact of the clamping block. When the clamping pressure exceeds the threshold, the top plate retracts to avoid overload damage.

[0020] Composite protective structure: The gradient hardness rubber membrane of the clamping block achieves stress dispersion while ensuring the coefficient of friction. It has been tested and can withstand 2000 clamping cycles without obvious indentation.

[0021] High-efficiency testing process

[0022] Single-action clamping: After the wire is inserted into the wire harness placement slot, a single cylinder trigger can automatically complete the entire process of pressing → positioning → clamping, reducing the operation time to 1.2 seconds / cycle;

[0023] Online tension adjustment: The servo drive mechanism on the track can achieve ±150mm stroke fine adjustment of the clamping table, and with the tension sensor, the wire tension can be stably controlled within the range of 0.5-2N;

[0024] Compatibility and scalability

[0025] Modular slot design: The clamping slot width supports quick bushing replacement and can accommodate wire diameters ranging from 0.05 to 2.5 mm;

[0026] Multi-station collaboration: Driven by a linear motor on the track, it supports up to 8 clamping stations working simultaneously, improving inspection efficiency by 400%. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of this utility model;

[0028] Figure 2 This is a cross-sectional view of the clamping platform of this utility model;

[0029] Figure 3 This is a schematic diagram of the clamping state of the clamping table of this utility model;

[0030] Figure 4 This is a side view of the structure of the clamping platform of this utility model;

[0031] Figure 5 This utility model Figure 2 A magnified view of a portion of point A in the middle.

[0032] In the diagram: 1. Track; 2. Clamping platform; 3. Side slot; 4. Pressure plate; 5. Clamping block; 6. Clamping groove; 7. Return spring; 8. Top plate; 9. Guide groove; 10. Inner groove; 11. Wire harness placement groove; 12. Rotating cylinder. Detailed Implementation

[0033] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0034] Please see Figure 1-5 This utility model provides a technical solution: a tooling fixture for testing enameled wire, including a track 1 and a clamping platform 2 that is slidably arranged above the track 1 by a driving mechanism. The clamping platform 2 has a clamping groove 6 in the middle of its inner cavity, and wire harness placement grooves 11 that are respectively connected to the clamping groove 6 on both sides of the clamping platform 2. The side of the clamping platform 2 has a side slot 3 that is connected to the clamping groove 6. The inner cavity of the side slot 3 is rotatably connected to a pressure plate 4 by a rotating cylinder 12. The inner cavity of the clamping groove 6 is slidably connected to two clamping blocks 5 that are driven by a double-rod clamping cylinder.

[0035] The inner cavity of the pressure plate 4 has an inner groove 10, and a top plate 8 is slidably connected to the inner cavity of the inner groove 10. A return spring 7 is fixedly connected to the top of the top plate 8, and the top of the return spring 7 is fixedly connected to the inner cavity of the inner groove 10. Guide grooves 9 are provided on both sides of the top plate 8. When clamping the enameled wire, the enameled wire is placed in the clamping groove 6 and the wire harness placement groove 11. Then, the pressure plate 4 is driven to rotate into the clamping groove 6 by rotating the cylinder 12. The pressure plate 4 moves downward to squeeze the enameled wire, causing it to move downward. After it has completely moved into place, the enameled wire is located between the two clamping blocks 5, and then clamped by the double rod. The cylinder drives two clamping blocks 5 to move toward the enameled wire, and during the movement, the sides abut against the guide groove 9 on the side of the top plate 8. The top plate 8 is squeezed and retracts into the inner groove 10. Then, the two clamping blocks 5 directly clamp the enameled wire. The tension of the enameled wire can be adjusted by sliding the clamping table 2 on the track 1 to facilitate subsequent testing. In use, the enameled wire only needs to be passed through the wire harness placement groove 11 for automatic clamping and positioning. The clamping accuracy is high, which can ensure that the enameled wire is clamped in a fixed position every time, ensuring the stability of the test data. The automatic extension and retraction of the top plate 8 effectively ensures the clamping effect.

[0036] The width of the clamping groove 6 is greater than the width of the wire harness placement groove 11, which can effectively position the enameled wire.

[0037] When the pressure plate 4 is rotated to its limit to the left, it is positioned above the two clamping blocks 5 and parallel to the top of the clamping blocks 5.

[0038] Both clamping blocks 5 have rubber membranes covering their opposite sides. The rubber membranes reduce friction and prevent the enameled wire from breaking due to excessive clamping force.

[0039] Precision positioning system

[0040] Combination positioning groove design: The wire harness placement groove 11 and the clamping groove 6 form a three-level positioning system. The differentiated design of the clamping groove width 6 > the wire harness placement groove 11 not only ensures the convenience of initial wire threading, but also matches the wire diameter with the placement groove width, and achieves micron-level radial positioning through the narrowing structure of the clamping groove.

[0041] Pneumatic coordinated clamping: After the rotating cylinder 12 drives the pressure plate 4 to complete the pre-clamping and positioning, the double-rod clamping cylinder drives the symmetrical clamping block 5 to perform closed-loop clamping, and the repeatability of positioning accuracy can reach ±0.02mm.

[0042] Adaptive clamping protection

[0043] Dynamic pressure compensation mechanism: The guide groove 9 of the top plate 8 and the return spring 7 form a nonlinear stiffness system. The contact force is buffered by the inclined sliding at the moment of contact of the clamping block 5. When the clamping pressure exceeds the threshold, the top plate retracts to avoid overload damage.

[0044] Composite protective structure: The outer layer of the gradient hardness rubber film of the clamping block 5 has a Shore hardness of 50±5HA, and the inner layer has a Shore hardness of 70±5HA. While ensuring the coefficient of friction, it can achieve stress dispersion. It has been tested and can withstand 2000 clamping cycles without obvious indentation.

[0045] High-efficiency testing process

[0046] Single-action clamping: After the wire is inserted into the wire harness placement slot 11, a single cylinder trigger can automatically complete the entire process of pressing → positioning → clamping, reducing the operation time to 1.2 seconds / cycle;

[0047] Online tension adjustment: The servo drive mechanism on track 1 can achieve ±150mm stroke fine adjustment of clamping table 2, and with the tension sensor, the wire tension can be stably controlled within the range of 0.5-2N;

[0048] Compatibility and scalability

[0049] Modular slot design: The 6-width clamping slot supports quick bushing replacement and can accommodate wire diameters ranging from 0.05 to 2.5mm.

[0050] Multi-station collaboration: Driven by the linear motor of track 1, it supports up to 8 clamping stations working simultaneously, improving inspection efficiency by 400%.

[0051] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A tool fixture for enameled wire detection, comprising a track (1) and a clamping table (2) slidingly arranged above the track (1) driven by a driving mechanism, characterized in that: The clamping platform (2) has a clamping groove (6) in the middle of its inner cavity. The clamping platform (2) has wire harness placement grooves (11) on both sides that are connected to the clamping groove (6). The clamping platform (2) has a side slot (3) on its side that is connected to the clamping groove (6). The inner cavity of the side slot (3) is rotatably connected to a pressure plate (4) by a rotating cylinder (12). The inner cavity of the clamping groove (6) has two clamping blocks (5) slidably connected to it by a double-rod clamping cylinder. The inner cavity of the pressure plate (4) is provided with an inner groove (10), and the inner cavity of the inner groove (10) is slidably connected to a top plate (8). A return spring (7) is fixedly connected to the top of the top plate (8), and the top end of the return spring (7) is fixedly connected to the inner cavity of the inner groove (10). Guide grooves (9) are provided on both sides of the top plate (8).

2. The jig for detecting the enameled wire according to claim 1, characterized in that: The width of the clamping groove (6) is greater than the width of the wire harness placement groove (11).

3. The jig for detecting the enameled wire according to claim 1, characterized in that: When the pressure plate (4) is rotated to the left to its limit, it is positioned above the two clamping blocks (5) and parallel to the top of the clamping blocks (5).

4. The jig for detecting the enameled wire according to claim 1, characterized in that: Both clamping blocks (5) are covered with a rubber membrane on opposite sides.

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