Core twisting degree testing device and core twisting degree testing method

Abstract

The invention discloses a core twist inspection device and a core twist inspection method. The inspection device comprises a horizontal work table, a frame, a servo drive motor I, a roller device, a transverse screw drive shaft, a turbine reducer, a vertical screw driven shaft, a support platform and an inspection platform. The roller device is horizontally arranged, the output end of the servo drive motor I is connected to the transverse screw drive shaft by transmission, the two ends of the transverse screw drive shaft are connected to the vertical screw driven shaft by transmission through the turbine reducer, the top of the vertical screw driven shaft is connected to the lower end of the support platform, the servo drive motor I drives the support platform to move up and down, the inspection platform is connected to the support table through a linear module, the inspection platform can be horizontally displaced, the coil core is lifted up by the inspection platform, the core twist inspection is completed, the rework problem is effectively prevented, the production efficiency and product quality are improved, and the cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of iron core winding technology, and in particular to an iron core twisting degree inspection device and inspection method. Background Art

[0002] The transformer body is the core component of the transformer, and its production quality directly affects the insulation capacity of the body and the short-circuit resistance of the transformer. The traditional body production process is a set process, specifically: first the coil is wound on the mold to form, then the mold is removed, and finally the coil is put on the manufactured iron core. The disadvantage of this process is that there is a gap between the coil and the iron core. During actual operation, the electromagnetic force will be released through the gap, causing the coil to deform, and then cause short circuit and burning. In order to eliminate the gap between the coil and the iron core, the iron core clamping winding process was developed. The iron core clamping winding process is to wind the coil directly on the coil, which is tightly wound without gaps, improving the short-circuit resistance of the oil-immersed transformer.

[0003] The core clamping winding process requires special winding equipment, which includes two synchronous four-jaw chucks. During the winding process, the two ends of the core need to be clamped with the clamps, and the wire or copper foil is wound by rotating the core. The entire winding process will cause a twisting force on the core column to cause the core to twist and deform. After a large number of trial production, it was found that when the core distortion is greater than 2mm, the subsequent core assembly will not be able to proceed smoothly, resulting in rework. Therefore, the core after winding is completed needs to be tested for core distortion to avoid rework problems after further processing of the product. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a core twisting degree inspection device and inspection method, which has a reasonable and convenient structural design and can realize the twisting degree inspection of the coil core of the oil-immersed clamped core winding product with a capacity of 200kVA-10500kVA.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A core twisting degree inspection device, comprising a horizontal work surface, a frame, a servo drive motor I, a roller device, a transverse screw drive shaft, a worm gear reducer, a vertical screw driven shaft, a support platform, and an inspection platform. The roller device is horizontally arranged in the middle of the work surface to carry a coil transport tool to be inspected. The servo drive motor I is fixed on the frame, and its output end is connected to the transverse screw drive shaft by transmission. Both ends of the transverse screw drive shaft are connected to the vertical screw driven shaft by transmission through the worm gear reducer. The top end of the vertical screw driven shaft is connected to the lower end of the support platform. The servo drive motor I drives the support platform to move up and down.

[0007] The inspection platform is connected to the support table through a linear module, and the inspection platform is connected to a horizontal driving mechanism, which drives the inspection platform to move horizontally.

[0008] The lower end of the support platform is connected to the work surface through four guide support rods. The work surface is provided with a sliding sleeve, and the guide support rods are slidably connected to the sliding sleeve.

[0009] The linear module is a combination of a slide rail I and a slider I. The slide rail I is a double parallel slide rail fixedly connected to the support platform, and the slider I is fixed at the lower end of the inspection platform.

[0010] Furthermore, a horizontal screw assembly is fixedly arranged above the support platform, and the inspection platform can be horizontally displaced on the support platform through the horizontal screw assembly.

[0011] The horizontal screw assembly includes a drive motor II, a horizontal screw II, a slider II, and a slide rail II. The output end of the drive motor II is transmission-connected to the horizontal screw II. The horizontal screw II is threadedly connected to the slider II. The slider II slides on the slide rail II. The slider II is fixedly connected to the inspection platform, and the drive motor II drives the inspection platform to move horizontally.

[0012] The roller device is used to carry and transport tooling and is connected to the front and rear conveying mechanisms of the production line to facilitate continuous and rapid inspection. The uppermost end of the roller device is arranged below the supporting platform.

[0013] Furthermore, the work surface is provided with an in-position sensor for sensing the coil reaching the inspection position.

[0014] The roller device is provided with a driving motor III which is in transmission connection with the roller. The driving motor III drives the roller to rotate, which facilitates the displacement of the tooling transported above.

[0015] The frame is formed by welding profiles, and the remaining components are formed by connecting with bolts.

[0016] The upper surfaces of the work table, support platform and inspection platform are finely machined, and the flatness error is no more than 0.2mm.

[0017] The servo drive motor I described above has a synchronous pulley installed at the motor drive shaft position, which is connected to the transverse screw drive shaft through a synchronous belt.

[0018] The transverse screw drive shaft is connected to the work surface or the frame through a bearing seat.

[0019] The roller device is a roller tray, which can be selected and designed according to the roller model of the actual production line, and has strong versatility.

[0020] The worm reducer is a right-angle reducer, the input shaft and the output shaft are 90 degrees, and can realize horizontal driving and vertical following.

[0021] A method for testing the twisting degree of an iron core using the above-mentioned iron core twisting degree testing device comprises the following steps:

[0022] According to the actual width of the coil to be inspected, respectively operate the servo motors II at the two upper inspection platforms to move the inspection platforms horizontally to both sides, so that the inspection platforms stop when one side is 50-100mm away from both ends of the coil, so that the coil to be inspected can enter the corresponding position of the core twisting degree inspection device;

[0023] The height of the inspection platform is appropriately adjusted through the lower servo drive motor to ensure that there is a gap between the upper surface of the inspection platform and the lower surface of the iron core at both ends. The gap is set at 20-30mm.

[0024] The coil to be inspected is moved to the middle of the drum by the conveying tool on the production line and enters the state of waiting for inspection;

[0025] After the coil to be inspected is in place, the inspection platform is raised vertically by the bottom servo drive motor I, and the inspection platform surfaces on both sides contact the lower end surfaces of the iron cores at both ends of the coil and support and lift the coil as a whole, and the coil is separated from the transport tooling.

[0026] Use a square ruler to check the warping gap between the test platform and the contact surface of the core at both ends. If it is less than or equal to 2mm, it is qualified. The two right-angled sides of the square ruler are close to the test platform table and the side of the core respectively, and observe whether the gap of the warped part of the core exceeds the test standard data. If it exceeds, it proves that the product is unqualified.

[0027] After the inspection is completed, the inspection platform is moved down horizontally so that the inspection platform is separated from the lower end of the coil core, and the coil falls back onto the transport tooling. The transport tooling and the coil are moved to the next production line through the roller device, and the inspection is completed.

[0028] Repeat steps 1-6 to achieve continuous testing.

[0029] The beneficial effects of the present invention are as follows: all displacements of the core twisting degree inspection device are driven by servo motors, and the operation is stable and reliable. Through the core twisting degree inspection device, the twisting degree inspection of the coil core of the oil-immersed clamped core winding product with a capacity of 200kVA-4500kVA can be realized, which effectively prevents the occurrence of rework problems, improves production efficiency and product quality, and reduces costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The present invention will be further described below in conjunction with the accompanying drawings.

[0031] Figure 1 It is a schematic diagram of the structure of an embodiment of the present invention;

[0032] Figure 2 It is a schematic diagram of the side structure of an embodiment of the present invention;

[0033] Figure 3 It is a schematic diagram of a top view structure of an embodiment of the present invention;

[0034] Figure 4 This is a schematic diagram of the state to be inspected of the method of the present invention;

[0035] Figure 5 It is a schematic diagram of the square ruler inspection in the method of the present invention.

[0036] Figure 6 This is a schematic diagram of the iron core transport tooling.

[0037] As shown in the figure: 1-work table, 2-frame, 3-servo drive motor I, 4-roller device, 5-transverse screw drive shaft, 6-turbine reducer, 7-guide support rod, 8-vertical screw driven shaft, 9-inspection platform, 10-horizontal screw assembly, 11-slide rail I, 12-drive motor II, 13-screw II, 14-support table, 15-iron core, 16-right angle ruler, 17-base plate, 18-support plate. Implementation

[0038] As shown in the attached figure, the device for testing the twist of the core is used in the automatic production line of clamping the core, and is used as an inspection station of the production line. A device for testing the twist of the core includes a horizontal work surface, a frame, a servo drive motor I, a roller device, a transverse screw drive shaft, a worm reducer, a vertical screw driven shaft, a support platform, and an inspection platform. The roller device is horizontally arranged in the middle of the work surface to carry the coil transport tooling to be inspected. The servo drive motor I is fixed on the frame, and its output end is connected to the transverse screw drive shaft by transmission. Both ends of the transverse screw drive shaft are connected to the vertical screw driven shaft by transmission through the worm reducer. The top end of the vertical screw driven shaft is connected to the lower end of the support platform. The servo drive motor I drives the support platform to move up and down.

[0039] The inspection platform is connected to the support table through a linear module, and the inspection platform is connected to a horizontal driving mechanism, which drives the inspection platform to move horizontally.

[0040] The lower end of the support platform is connected to the work surface through four guide support rods. The work surface is provided with a sliding sleeve. The guide support rods are slidably connected with the sliding sleeve. The sliding sleeve can be a sleeve bearing.

[0041] The linear module is a combination of a slide rail I and a slider I. The slide rail I is a double parallel slide rail fixedly connected to the support platform, and the slider I is fixed at the lower end of the inspection platform.

[0042] Furthermore, a horizontal screw assembly is fixedly arranged above the support platform, and the inspection platform can be horizontally displaced on the support platform through the horizontal screw assembly.

[0043] The horizontal screw assembly includes a drive motor II, a horizontal screw II, a slider II, and a slide rail II. The output end of the drive motor II is transmission-connected to the horizontal screw II. The horizontal screw II is threadedly connected to the slider II. The slider II slides on the slide rail II. The slider II is fixedly connected to the inspection platform, and the drive motor II drives the inspection platform to move horizontally.

[0044] The roller device is used to carry and transport tooling and is connected to the front and rear conveying mechanisms of the production line to facilitate continuous and rapid inspection. The uppermost end of the roller device is arranged below the supporting platform.

[0045] Furthermore, the work surface is provided with an in-position sensor for sensing the coil reaching the inspection position.

[0046] The roller device is provided with a driving motor III which is in transmission connection with the roller. The driving motor III drives the roller to rotate, which facilitates the displacement of the tooling transported above.

[0047] The frame is formed by welding profiles, and the remaining components are formed by connecting with bolts.

[0048] The upper surfaces of the work table, support platform and inspection platform are finely machined, and the flatness error is no more than 0.2mm.

[0049] The servo drive motor I described above has a synchronous pulley installed at the motor drive shaft position, which is connected to the transverse screw drive shaft through a synchronous belt.

[0050] The transverse screw drive shaft is fixed to the lower end of the worktable through two bearing seats.

[0051] The roller device is a roller tray, which can be selected and designed according to the roller model of the actual production line, and has strong versatility.

[0052] The worm reducer is a right-angle reducer, the input shaft and the output shaft are 90 degrees, and can realize horizontal driving and vertical following.

[0053] The transport tooling is as follows Figure 6 As shown, it includes a bottom plate and four support plates arranged on the bottom plate, the upper ends of the support plates are provided with inclined surfaces, and two support plates symmetrically form a concave bearing surface.

[0054] A method for testing the twisting degree of an iron core using the above-mentioned iron core twisting degree testing device comprises the following steps:

[0055] According to the actual width of the coil to be inspected, respectively operate the servo motors II at the two upper inspection platforms to move the inspection platforms horizontally to both sides, so that the inspection platforms stop when one side is 50-100mm away from both ends of the coil, so that the coil to be inspected can enter the corresponding position of the core twisting degree inspection device;

[0056] The height of the inspection platform is appropriately adjusted through the lower servo drive motor to ensure that there is a gap between the upper surface of the inspection platform and the lower surface of the iron core at both ends. The gap is set at 20-30mm.

[0057] After the coil to be inspected is moved to the middle of the drum by the conveying tool on the production line, it enters the state of waiting for inspection; Figure 4 As shown in , B represents that there is a gap between the inspection platform and the iron core, and C represents that the coil has not separated from the transport tooling.

[0058] After the coil to be inspected is in place, the inspection platform is raised vertically by the bottom servo drive motor I, and the inspection platform surfaces on both sides contact the lower end surfaces of the iron cores at both ends of the coil and support and lift the coil as a whole, and the coil is separated from the transport tooling.

[0059] Use a square ruler to check the warping gap between the test platform and the contact surface of the core at both ends. If it is less than or equal to 2mm, it is qualified. The two right-angled sides of the square ruler are close to the test platform table and the side of the core respectively, and observe whether the gap of the warped part of the core exceeds the test standard data. If it exceeds, it proves that the product is unqualified.

[0060] After the inspection is completed, the inspection platform is moved down horizontally so that the inspection platform is separated from the lower end of the coil core, and the coil falls back onto the transport tooling. The transport tooling and the coil are moved to the next production line through the roller device, and the inspection is completed.

[0061] Repeat steps 1-6 to achieve continuous testing.

[0062] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in the technical field, several improvements can be made without departing from the principles of the present invention. These improvements should also be regarded as the scope of protection of the present invention without paying creative labor.

Claims

1. A method for testing the twist of an iron core, characterized in that: It uses the core distortion test device for inspection: The core twisting degree inspection device includes a horizontal work surface, a frame, a servo drive motor I, a roller device, a transverse screw drive shaft, a worm reducer, a vertical screw driven shaft, a support platform, and an inspection platform. The roller device is horizontally arranged in the middle of the work surface to carry the coil core transport tooling to be inspected. The servo drive motor I is fixed on the frame, and its output end is connected to the transverse screw drive shaft by transmission. Both ends of the transverse screw drive shaft are connected to the vertical screw driven shaft by transmission through the worm reducer. The top end of the vertical screw driven shaft is connected to the lower end of the support platform. The servo drive motor I drives the support platform to move up and down. The inspection platform is connected to the support platform through a linear module, and a horizontal lead screw assembly is fixedly arranged above the support platform, and the inspection platform can be horizontally displaced on the support platform through the horizontal lead screw assembly; The horizontal screw assembly includes a drive motor II, a horizontal screw II, a slider II, and a slide rail II. The output end of the drive motor II is transmission-connected to the horizontal screw II. The horizontal screw II is threadedly connected to the slider II. The slider II slides on the slide rail II. The slider II is fixedly connected to the inspection platform, and the inspection platform is driven to move horizontally by the operation of the drive motor II. The upper surfaces of the work table, support platform and inspection platform are finely processed, and the flatness error is no more than 0.2mm; The inspection method includes the following steps: (1) According to the actual width of the coil core to be inspected, operate the drive motors II at the two upper inspection platforms respectively to move the inspection platforms horizontally to both sides, so that the inspection platforms stop when one side is 50-100 mm away from both ends of the coil core, so that the coil core can enter the corresponding position of the core twisting degree inspection device; (2) Use the lower servo drive motor I to properly adjust the height of the inspection platform to ensure that there is a gap between the upper surface of the inspection platform and the lower surface of the iron core at both ends. The gap is set at 20-30mm; (3) After the coil core is moved to the middle of the drum through the conveying tooling on the production line, it enters the inspection state; (4) After the coil core is in place, the inspection platform is raised vertically by the bottom servo drive motor I. The inspection platforms on both sides contact the lower end surfaces of the coil cores at both ends and support and lift the coil core as a whole, and the coil core is separated from the transport tooling; (5) Use a square to check the warping gap between the test platform at both ends and the contact surface of the core. It is qualified if it is less than or equal to 2mm; (6) After the inspection is completed, the inspection platform is moved horizontally downward so that the inspection platform is separated from the lower end of the coil core, and the coil core falls back onto the transport tooling. The transport tooling and the coil core are moved to the next production line through the roller device, and the inspection is completed; (7) Repeat steps (1) to (6) to achieve continuous testing.

2. The method for testing the twisting degree of the core according to claim 1, characterized in that: The lower end of the support platform is connected with the work table through four guide support rods. The work table is provided with a sliding sleeve, and the guide support rods are slidably connected with the sliding sleeve.

3. The method for testing the twisting degree of the core according to claim 1, characterized in that: The linear module is a combination of a slide rail I and a slider I. The slide rail I is a double parallel slide rail fixedly connected to the support platform, and the slider I is fixed at the lower end of the inspection platform.

4. The method for testing the twisting degree of the core according to claim 1, characterized in that: The work table is provided with an in-position sensor to sense when the coil core reaches the inspection position.

5. The method for testing the twisting degree of the core according to claim 1, characterized in that: The roller device is provided with a driving motor III which is transmission-connected with the roller, and the driving motor III drives the roller to rotate.

6. The method for testing the twisting degree of the core according to claim 1, characterized in that: The transverse screw drive shaft is connected to the work surface or the frame through a bearing seat; the roller device is a roller tray; the worm reducer is a right-angle reducer, and the input shaft and the output shaft form a 90° angle.

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