Stator skew pressing device and skew method

Abstract

The present invention discloses a stator twisting and clamping device and a twisting method, comprising a twisting assembly and a clamping assembly, wherein the twisting assemblies are respectively arranged at two sides of the clamping assembly in opposition, the clamping assembly clamps the coil core, and the twisting assembly twists the coil core; the clamping assembly comprises a hydraulic assembly, a pulling shaft, an upper pressure head, a clamping plug, a tire core, a lower support and a supporting surface; the lower support is arranged on the supporting surface, the hydraulic assembly is arranged at the lower position of the supporting surface, the pulling shaft is fixedly connected to the hydraulic assembly, the lower support and the supporting surface are provided with a through hole matching the diameter of the pulling shaft, and the pulling shaft penetrates the through hole; in the present invention, when the twisting shaft moves radially, the first rotating gear can move stably radially along the gear on the second gear shaft, and at this time, the second rotating gear can move stably radially along the gear on the first gear shaft; the overall stability and smoothness of the movement of the twisting shaft are ensured, thereby ensuring the rotation accuracy during twisting.

Description

Technical Field

[0001] The invention relates to the technical field of motor stator processing, in particular to a stator skew pressing device and a skew method. Background Art

[0002] The three-phase AC servo motor is a high-tech product of mechatronics, which can convert voltage signals into torque and speed to drive the control object. It is used as an actuator in the automatic control system. Compared with the production and processing technology of general motors, the servo motor has the characteristics of high processing precision and complex process.

[0003] The general stator processing process of motors is: core stacking, press mounting (internal or external), slot insulation, wire embedding, wiring binding, paint dipping and baking, etc. When the core is stacked, it is positioned with an oblique key on a special stacking tire to achieve the stator core oblique slot angle requirement.

[0004] The stator processing process of the servo motor is as follows: the core is stacked by quantitative pressing, and the slot insulation with flanges at both ends is inserted into the punching slot to fix the stator core. The coil core is formed after the wire is embedded and tied. The coil core is then twisted and pressed tightly to make the core slot angle meet the requirements, and then the machine base is hot-fitted, dipped in paint and baked to form the stator.

[0005] According to the structural characteristics of the three-phase AC servo motor, the base is an aluminum alloy profile, and the interference between the inner circle of the base and the outer circle of the stator core is 0.25 to 0.35 mm. The interference is relatively large. The conventional process method of stacking the stator core and installing the base will cause the base to deform during pressurization and cannot be pressed. It is not suitable for the servo motor stator processing technology requirements. New process methods and technologies are needed to produce and process servo motor stators. Summary of the invention

[0006] The purpose of the present invention is to provide a stator twisting and clamping device and a twisting method to solve the problem that the process method of stator core stacking and pressing machine seat in the prior art will cause the seat to deform during pressing and cannot be pressed.

[0007] The present invention is achieved through the following scheme:

[0008] A stator skew clamping device and skew method, comprising a skew component and a clamping component, wherein the skew components are respectively arranged at two sides of the clamping component, the clamping component clamps the coil core, and the skew component skews the coil core.

[0009] Preferably, the clamping assembly includes a hydraulic assembly, a pull shaft, an upper pressure head, a clamping plug, a tire core, a lower support and a support surface; the lower support is arranged on the support surface, the hydraulic assembly is arranged at the lower position of the support surface, the pull shaft is fixedly connected to the hydraulic assembly, and the lower support and the support surface are provided with a through hole matching the diameter of the pull shaft, and the pull shaft is arranged to penetrate the through hole.

[0010] Preferably, the upper pressure head is a cylindrical structure with one end open, and the upper pressure head includes an upper circular plate and a lower cylinder; the upper circular plate is provided with a socket matching the pull shaft, the upper circular plate is fixedly connected to the lower cylinder by bolts, and a stepped contact surface is provided on the end of the lower cylinder away from the upper circular plate.

[0011] Preferably, the lower support includes a support base and a support tube, the support base is arranged on the support surface, the support tube is arranged at the center of the support base, and one end of the support tube away from the support base contacts and supports the lower surface of the coil core.

[0012] Preferably, the tire core is arranged on the outer surface of the pull shaft, and the tire core is composed of three arc-shaped plates, which are arc-shaped and spliced ​​into a cylindrical structure matching the pull shaft and sleeved on the pull shaft.

[0013] Preferably, the twisting assembly includes a card plate, a card plate frame, a twisting shaft, a main bracket, a twisting handle, a first gear shaft, a second gear shaft and a fixed shaft; the fixed shaft and the twisting shaft are both horizontally arranged on the main bracket, the fixed shaft is arranged at the lower position of the twisting shaft, the card plate frame is arranged at the end of the twisting shaft, the card plate is arranged in the card plate frame, and the twisting wrench is fixedly connected to the twisting shaft.

[0014] Preferably, the twisting shaft can move radially along the connecting hole on the main bracket, the first gear shaft is sleeved on the twisting shaft, the second gear shaft is sleeved on the fixed shaft, the first gear shaft is fixedly connected to the twisting shaft, and the second gear shaft can rotate relative to the fixed shaft. A first rotating gear is provided at the end of the first gear shaft away from the pallet frame, and a second rotating gear is provided at the end of the second gear shaft close to the pallet frame; the first rotating gear is meshed with the gear on the second gear shaft, and the second rotating gear is meshed with the gear on the first gear shaft.

[0015] Preferably, a locking assembly is provided at the connection portion of the second gear shaft close to the main bracket, and the locking assembly includes a locking hole, a locking rod and a push-pull ring; the push-pull ring is fixedly connected to the locking rod, and the locking hole is provided through the main bracket.

[0016] The present invention provides a stator skew clamping device skew method, comprising the following steps:

[0017] Step 1: Select the corresponding tire core, lower support, upper pressure head, and clamping plate according to the different specifications of the servo motor, and install and debug the twisting and clamping device;

[0018] Step 2: Install the lower support and tire core, lift the coil core with a sling, put the lead wire end downward on the tire core, coil the lead wire part into the lower support groove, and let the end face of the coil core fall on the lower support. Adjust the circumferential position of the coil core so that the outer circle slot of the coil core is consistent with the direction of the torsion axis;

[0019] Step 3: Put on the upper pressure head, insert the clamping block, start the hydraulic system, press the pull shaft down switch, and test the coil core once;

[0020] Step 4: Install the clamps on the left and right sides of the skew axis, and adjust the center line of the skew clamp to align with the center of the outer circle notch of the coil core;

[0021] Step 5: Push the twist handle with both hands, insert the positioning part of the twist card into the notches on both sides of the coil core, move your right hand forward and your left hand backward to twist the coil core to a certain angle;

[0022] Step 6: Use the angle measurement template to measure the twist angle of the marking groove close to the outer circle of the coil core, turn the twist handle to make the twist angle meet the requirements of the drawing, start the pull-down switch of the pull shaft, and the pull shaft moves downward to drive the insert to press the core to maintain pressure;

[0023] Step 7: Remove the skew pallet and measure the angle of the skew groove with the angle measurement template again. If it does not meet the requirements of the drawing, re-embed the pallet in the skew groove, release the pressure, skew the coil core, press and measure the angle of the skew groove until the angle of the skew groove meets the requirements of the drawing.

[0024] As a preferred method, the method comprises step eight: checking whether the outer circle of the coil core is flat, filing any protruding parts with a file, and cleaning up the iron filings;

[0025] Step 9: Quickly put the heated machine base onto the coil core. When the lower end surface of the machine base reaches the bottom plane of the lower support positioning, turn and adjust the machine base by hand so that one side rests on the limit block;

[0026] Step 10: Hold the air duct and use compressed air to blow the diagonal ventilation holes of the machine base in turn to cool the machine base. When the temperature of the machine base drops to 60℃~70℃, release the pressure of the hydraulic system, remove the clamping block and the upper pressure head, and remove the stator from the tire core.

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0028] 1. In the present invention, when the pulling shaft moves downward under the drive of the hydraulic assembly, the clamping block at the top of the pulling shaft moves downward and contacts the top of the upper pressure head, so that the bottom of the upper pressure head is continuously in contact with and pressed against the top of the coil core. At this time, the top of the tire core is subjected to the pressure from the inside of the upper pressure head, so that the three arc-shaped plates are slightly expanded outward under the force, and the external position of the coil core is expanded and supported to prevent the inside of the coil core from being damaged when the coil core is compressed under force; when the pulling shaft is continuously stretched downward under the action of the hydraulic assembly, the coil core is fixed, and then the coil core is twisted by the twisting assembly, thereby ensuring the accuracy and effect of the twisting.

[0029] 2. In the present invention, when the skew shaft moves radially, the first rotating gear can move stably radially along the gear on the second gear shaft, and at this time, the second rotating gear can move stably radially along the gear on the first gear shaft; thus ensuring the overall smooth and stable movement of the skew shaft, thereby ensuring the rotation accuracy during skew.

[0030] 3. This method can efficiently skew the stator core and ensure that the interference between the inner circle of the base and the outer circle of the stator core is within a reasonable range. This method can also ensure that the base and the inside of the coil core will not deform. The skew angle of the coil core can be efficiently and accurately controlled. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0032] Figure 2 is a schematic structural diagram of the skew assembly in the present invention;

[0033] Description of the drawings: 1. Twisting assembly; 2. Clamping assembly; 101. Pallet; 102. Pallet frame; 103. Twisting shaft; 104. Main bracket; 105. Twisting handle; 106. First gear shaft; 107. Second gear shaft; 108. Fixed shaft; 109. First rotating gear; 110. Second rotating gear; 111. Locking hole; 112. Locking rod; 113. Push-pull ring; 201. Hydraulic assembly; 202. Pull shaft; 203. Upper pressure head; 204. Clamping plug; 205. Tire core; 206. Lower support; 207. Support surface; 208. Upper circular plate; 209. Lower cylinder; 210. Contact surface; 211. Support base; 212. Support cylinder. DETAILED DESCRIPTION

[0034] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0035] Any feature disclosed in this specification (including any additional claims and abstract), unless otherwise stated, may be replaced by other equivalent or alternative features having similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0036] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by the terms "up", "down", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0037] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features.

[0038] Example 1

[0039] like Figures 1-2 As shown, a stator skew clamping device includes a skew component 1 and a clamping component 2. The skew components 1 are respectively arranged at two sides of the clamping component 2. The clamping component 2 clamps the coil core, and the skew component 1 skews the coil core to achieve a skew slope that meets the requirements.

[0040] The clamping assembly 2 includes a hydraulic assembly 201, a pull shaft 202, an upper pressure head 203, a clamping plug 204, a tire core 205, a lower support 206 and a support surface 207; the lower support 206 is arranged on the support surface 207, the hydraulic assembly 201 is arranged at the lower position of the support surface 207, the pull shaft 202 is fixedly connected to the hydraulic assembly 201, and the pull shaft 202 is driven to move up and down by the hydraulic assembly 201, and the lower support 206 and the support surface 207 are provided with through holes matching the diameter of the pull shaft 202, and the pull shaft 202 is arranged to penetrate the through holes.

[0041] The connection between the pull shaft 202 and the hydraulic assembly 201 is threaded connection, clamping connection or plug-in connection.

[0042] The center of the upper pressure head 203 is provided with a through hole matching the pull shaft 202, and the upper pressure head 203 is arranged at the top position of the pull shaft 202. The top of the pull shaft 202 is provided with a socket matching the clamping plug 204, and the clamping socket is detachably arranged in the socket.

[0043] The upper pressure head 203 is a cylindrical structure with one end open, and the upper pressure head 203 includes an upper circular plate 208 and a lower cylinder 209; the upper circular plate 208 is provided with a socket matching the pull shaft 202, and the upper circular plate 208 is fixedly connected to the lower cylinder 209 by bolts, and the end of the lower cylinder 209 away from the upper circular plate 208 is provided with a stepped resistance surface 210. When the clamping operation is performed, the resistance surface 210 contacts the upper surface of the coil core, and the copper winding on the coil core is located on the inner side of the lower cylinder 209 and is set to a stepped shape, which can reduce damage to the copper winding and make the end of the lower cylinder 209 quickly contact the upper surface of the coil core.

[0044] The lower support 206 includes a support base 211 and a support tube 212. The support base 211 is arranged on the support surface 207, and the support tube 212 is arranged at the center of the support base 211. The end of the support tube 212 away from the support base 211 contacts and supports the lower surface of the coil core.

[0045] The coil core is firmly contacted by the upper pressure head 203 and the lower support 206. The hydraulic assembly 201 in this solution is a common hydraulic device in the prior art, and any device that can achieve the rise and fall of the pull shaft 202 belongs to the protection scope of this solution.

[0046] The tire core 205 is arranged on the outer surface of the pull shaft 202, and the inner surface of the coil core is protected by the tire core 205 to prevent the inner surface of the coil core from being damaged when pressed. The tire core 205 is composed of three arc-shaped plates, which are arc-shaped and spliced ​​into a cylindrical structure matching the pull shaft 202, and are sleeved on the pull shaft 202;

[0047] When in use, the coil core is placed on the tire core 205, and then the upper pressure head 203 is placed on the coil core. Under the action of gravity, the resistance surface 210 on the upper pressure head 203 contacts the upper surface of the coil core, and the support tube 212 of the lower support 206 contacts the lower surface of the coil core.

[0048] When the pulling shaft 202 moves downward under the drive of the hydraulic component 201, at this time, the clamping block 204 at the top position of the pulling shaft 202 moves downward and contacts the top position of the upper pressure head 203, so that the bottom of the upper pressure head 203 is continuously in contact with and pressed against the top position of the coil core. At this time, the top of the tire core 205 is subjected to the pressure from the inside of the upper pressure head 203, so that the three arc-shaped plates are forced to expand slightly outward, and the external position of the coil core is expanded and supported to prevent the coil core from being damaged when it is compressed; when the pulling shaft 202 is continuously stretched downward under the action of the hydraulic component 201, the coil core is fixed, and then the coil core is twisted by the twisting component 1.

[0049] The skew assembly 1 includes a card plate 101, a card plate frame 102, a skew shaft 103, a main bracket 104, a skew handle 105, a first gear shaft 106, a second gear shaft 107 and a fixed shaft 108; the fixed shaft 108 and the skew shaft 103 are both horizontally arranged on the main bracket 104, the fixed shaft 108 is arranged at the lower position of the skew shaft 103, the card plate frame 102 is arranged at the end of the skew shaft 103, the card plate 101 is arranged in the card plate frame 102, the skew wrench is fixedly connected to the skew shaft 103, and the skew shaft 103 is rotated by the skew wrench, thereby driving the card plate 101 to skew, thereby realizing the skew of the coil core.

[0050] The skew shaft 103 can move radially along the connection hole on the main bracket 104, so that the card plate 101 can be tightly connected with the coil core; the first gear shaft 106 is sleeved on the skew shaft 103, and the second gear shaft 107 is sleeved on the fixed shaft 108. The first gear shaft 106 is fixedly connected to the skew shaft 103, and the second gear shaft 107 can rotate relative to the fixed shaft 108. The first gear shaft 106 is provided with a first rotating gear 109 at one end away from the card plate frame 102, and the second gear shaft 107 is provided with a second rotating gear 110 at one end close to the card plate frame 102; the first rotating gear 109 is meshed with the gear on the second gear shaft 107, and the second rotating gear 110 is meshed with the gear on the first gear shaft 106;

[0051] When the skew shaft 103 moves radially, the first rotating gear 109 can move stably radially along the gear on the second gear shaft 107, and the second rotating gear 110 can move stably radially along the gear on the first gear shaft 106, ensuring that the skew shaft 103 moves smoothly and stably as a whole.

[0052] A locking assembly is provided at the connection portion of the second gear shaft 107 close to the main bracket 104, and the locking assembly includes a locking hole 111, a locking rod 112 and a push-pull ring 113; the push-pull ring 113 is fixedly connected to the locking rod 112, the locking hole 111 passes through the main bracket 104, and the locking rod 112 is arranged in the locking hole 111, and the position of the locking hole 111 is matched with the position of the second gear shaft 107. When the second gear shaft 107 needs to be locked, the locking rod 112 is pushed into the locking hole 111, and the locking rod 112 is inserted between the gears of the second gear shaft 107, so that the second gear shaft 107 cannot rotate, thereby achieving locking.

[0053] When the coil core is twisted, the twist handle is used to rotate it. At this time, if the twist shaft is not locked, the twist shaft will change its twist angle under the action of the gravity of the twist handle, affecting the twisting state. Therefore, a locking component needs to be introduced to lock it, reduce the error during twisting, and improve the twisting efficiency.

[0054] The main support 104 is fixedly connected to the support surface 207 .

[0055] The skew assembly 1 can realize smooth movement, stable rotation and locking of the skew shaft 103 .

[0056] Example 2

[0057] This embodiment provides a method for twisting a stator skew clamping device, which specifically includes the following steps:

[0058] Step 1: Select the corresponding tire core 205, lower support, upper pressure head 203, and clamping plate 101 according to different specifications of the servo motor, and install and debug the twisting and clamping device;

[0059] Step 2: Install the lower support and tire core 205, lift the coil core with a sling, put the lead wire end downward on the tire core 205, coil the lead wire part into the lower support groove, and let the end face of the coil core fall on the lower support. Adjust the circumferential position of the coil core so that the outer circle slot of the coil core is consistent with the direction of the skew axis 103 line;

[0060] Step 3: Put on the upper pressure head 203, insert the clamping plug 204, start the hydraulic system to jog the pull shaft 202 downward switch, and test the coil core once;

[0061] Step 4: Install the clamping plates 101 on the left and right sides of the skew shaft 103, and adjust the center line of the skew clamping plate 101 to align with the center of the outer circle notch of the coil core;

[0062] Step 5: Push the twist handle 105 with both hands, insert the positioning part of the twist clamp 101 into the notches on both sides of the coil core, and twist the coil core by the right hand forward and the left hand backward to twist the coil core to a certain angle;

[0063] Step 6: Use the angle measurement template to measure the twist angle of the marking groove close to the outer circle of the coil core, turn the twist handle 105 to make the twist angle meet the requirements of the drawing, start the pull-down switch of the pull shaft 202, and the pull shaft 202 moves downward, driving the insert to press the core to maintain pressure;

[0064] Step 7: withdraw the skew card plate 101, and measure the angle of the skew groove again with the angle measurement template. If it does not meet the requirements of the drawing, re-embed the card plate 101 in the skew groove, release the pressure, skew the coil core, press and measure the angle of the skew groove until the angle of the skew groove meets the requirements of the drawing.

[0065] Step 8: Check whether the outer circle of the coil core is flat. If there is any protrusion, file it flat with a file and clean up the iron filings;

[0066] Step 9: Quickly put the heated machine base onto the coil core. When the lower end surface of the machine base reaches the bottom plane of the lower support positioning, turn and adjust the machine base by hand so that one side rests on the limit block;

[0067] Step 10: Hold the air duct and use compressed air to blow the diagonal ventilation holes of the machine base in turn to cool the machine base. When the temperature of the machine base drops to 60℃~70℃, release the pressure of the hydraulic system, remove the clamping block 204 and the upper pressure head 203, and remove the stator from the tire core 205.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A stator skew clamping device, characterized in that: It includes a twisting component and a clamping component, which are respectively arranged at two sides of the clamping component in opposition, the clamping component clamps the coil core, and the twisting component twists the coil core; the clamping component includes a hydraulic component, a pulling shaft, an upper pressure head, a clamping plug, a tire core, a lower support and a supporting surface; the lower support is arranged on the supporting surface, the hydraulic component is arranged at the lower position of the supporting surface, the pulling shaft is fixedly connected to the hydraulic component, the lower support and the supporting surface are provided with a through hole matching the diameter of the pulling shaft, and the pulling shaft is arranged to penetrate the through hole; a through hole matching the pulling shaft is arranged at the center of the upper pressure head, the upper pressure head is arranged at the top of the pulling shaft, a socket matching the clamping plug is arranged on the top of the pulling shaft, and the clamping plug is detachably arranged in the socket.

2. A stator skew clamping device according to claim 1, characterized in that: The upper pressure head is a cylindrical structure with one end open, and the upper pressure head includes an upper circular plate and a lower cylinder; the upper circular plate is provided with a socket matching the pull shaft, the upper circular plate is fixedly connected to the lower cylinder by bolts, and a stepped resistance surface is provided on the end of the lower cylinder away from the upper circular plate.

3. A stator skew clamping device according to claim 1, characterized in that: The lower support includes a support base and a support tube, the support base is arranged on the support surface, the support tube is arranged at the center of the support base, and one end of the support tube away from the support base contacts and supports the lower surface of the coil core.

4. A stator skew clamping device as claimed in claim 1, 2 or 3, characterized in that: The tire core is arranged on the outer side of the pull shaft, and the tire core is composed of three arc-shaped plates, which are arc-jointed into a cylindrical structure matching the pull shaft and sleeved on the pull shaft.

5. A stator skew clamping device as claimed in claim 2 or 3, characterized in that: The skew assembly includes a card plate, a card plate frame, a skew shaft, a main bracket, a skew handle, a first gear shaft, a second gear shaft and a fixed shaft; the fixed shaft and the skew shaft are both horizontally arranged on the main bracket, the fixed shaft is arranged at the lower position of the skew shaft, the card plate frame is arranged at the end of the skew shaft, the card plate is arranged in the card plate frame, and the skew handle is fixedly connected to the skew shaft.

6. A stator skew clamping device as claimed in claim 5, characterized in that: The twist shaft can move radially along the connecting hole on the main bracket, the first gear shaft is sleeved on the twist shaft, the second gear shaft is sleeved on the fixed shaft, the first gear shaft is fixedly connected to the twist shaft, the second gear shaft can rotate relative to the fixed shaft, a first rotating gear is provided at the end of the first gear shaft away from the pallet frame, and a second rotating gear is provided at the end of the second gear shaft close to the pallet frame; the first rotating gear is meshed with the gear on the second gear shaft, and the second rotating gear is meshed with the gear on the first gear shaft.

7. A stator skew clamping device according to claim 6, characterized in that: A locking assembly is provided at the connection portion of the second gear shaft close to the main bracket, and the locking assembly includes a locking hole, a locking rod and a push-pull ring; the push-pull ring is fixedly connected to the locking rod, and the locking hole is provided through the main bracket.

8. A method for twisting a stator skew clamping device according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Select the corresponding tire core, lower support, upper pressure head, and clamping plate according to the different specifications of the servo motor, and install and debug the twisting and clamping device; Step 2: Install the lower support and tire core, lift the coil core with a sling, put the lead wire end downward on the tire core, coil the lead wire part into the lower support groove, and let the end face of the coil core fall on the lower support. Adjust the circumferential position of the coil core so that the outer circle slot of the coil core is consistent with the direction of the torsion axis; Step 3: Put on the upper pressure head, insert the clamping block, start the hydraulic system, press the pull shaft down switch, and test the coil core once; Step 4: Install the clamps on the left and right sides of the skew axis, and adjust the center line of the skew clamp to align with the center of the outer circle notch of the coil core; Step 5: Push the twist handle with both hands, insert the positioning part of the twist card into the notches on both sides of the coil core, move your right hand forward and your left hand backward to twist the coil core to a certain angle; Step 6: Use the angle measurement template to measure the twist angle of the marking groove close to the outer circle of the coil core, turn the twist handle to make the twist angle meet the requirements of the drawing, start the pull-down switch of the pull shaft, and the pull shaft moves downward to drive the insert to press the core to maintain pressure; Step 7: Remove the skew pallet and measure the angle of the skew groove with the angle measurement template again. If it does not meet the requirements of the drawing, re-embed the pallet in the skew groove, release the pressure, skew the coil core, press and measure the angle of the skew groove until the angle of the skew groove meets the requirements of the drawing.

9. A method for twisting a stator skew clamping device according to claim 8, characterized in that: Including step eight: check whether the outer circle of the coil core is flat, if there is a protrusion, use a file to file it flat, and clean up the iron filings; Step 9: Quickly put the heated machine base onto the coil core. When the lower end surface of the machine base reaches the bottom plane of the lower support positioning, turn and adjust the machine base by hand so that one side rests on the limit block; Step 10: Hold the air duct and use compressed air to blow the diagonal ventilation holes of the machine base in turn to cool the machine base. When the temperature of the machine base drops to 60℃~70℃, release the pressure of the hydraulic system, remove the clamping block and the upper pressure head, and remove the stator from the tire core.

Images