CN112332611B - Motor slot wedge positioning and cutting method - Google Patents
Motor slot wedge positioning and cutting method Download PDFInfo
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- CN112332611B CN112332611B CN202011060432.3A CN202011060432A CN112332611B CN 112332611 B CN112332611 B CN 112332611B CN 202011060432 A CN202011060432 A CN 202011060432A CN 112332611 B CN112332611 B CN 112332611B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0018—Applying slot closure means in the core; Manufacture of slot closure means
Abstract
The invention discloses a motor slot wedge positioning and cutting method, wherein a positioning mechanism is arranged at a milling cutter of a cutting head, the positioning mechanism comprises a movable positioning plate and a fixed positioning plate for limiting the cutting depth of the milling cutter, a step surface is arranged on the movable positioning plate, the step surface moves along the inner wall of a cylindrical inner cavity of a motor under the action of an air cylinder, when the step surface moves to the end part of the motor and is separated from the inner wall, the movable positioning plate displaces under the action of the air cylinder by utilizing the height difference between the step surface and the movable positioning plate, the displacement is induced by a microswitch arranged on the movable positioning plate and the movable positioning plate is controlled to stop moving, and the milling cutter starts to cut, so that the positioning and cutting work is completed; according to the invention, the two movable positioning plates move to the end part on the inner wall of the motor, the end part of the motor is positioned by utilizing the displacement generated by the induction of the movable positioning plates by the micro switch, and the cutting depth is controlled by the arrangement of the fixed positioning mechanism, so that the damage to a coil in the cutting process is avoided.
Description
Technical Field
The invention belongs to the technical field of motor slot wedge cutting, and particularly relates to a motor slot wedge positioning and cutting method.
Background
Because the slot wedges in the motor are manually embedded, the dimension error of the axial position of each slot wedge is very large, and the actual axial coordinate of the end part of each slot wedge cannot be accurately found by common automatic equipment, the manual cutting mode is mostly adopted in the prior art, the mode has low efficiency and large cutting difficulty, the cutting depth of the slot wedges is difficult to master, and the coil is damaged; the existing mechanical cutting has the problem that the cutting depth cannot be well controlled, or the control method is simple and crude, automation cannot be realized, batch cutting cannot be realized, the slot wedge cutting efficiency is low, and the labor intensity of workers is high; in addition, the axial positioning of the slot wedge in the motor cutting process is also a problem which is difficult to solve in the cutting process, the cutting lines are uneven, the coil cannot be completely taken out, and the coil is easy to damage. And the slot wedge is generally made of epoxy resin, a large amount of dust is generated in the cutting process, and the manual cutting cannot avoid the damage of the dust to a human body, so that the automatic cutting is a necessary trend in development.
Disclosure of Invention
The invention aims to solve the technical problems that in the prior art, the motor slot wedge positioning and cutting method is provided, the problems that in the motor slot wedge cutting process, the positioning cannot be effectively carried out, the cutting depth is difficult to control, the cutting efficiency is low, a coil is easy to damage after being cut, the harm to the human body of workers is reduced, and the like are solved.
The technical scheme adopted for solving the problems in the prior art is as follows:
the utility model provides a motor slot wedge location and cutting method, sets up positioning mechanism in cutting head milling cutter department, positioning mechanism includes movable positioning board and the fixed positioning board that is used for restricting milling cutter cutting depth, be equipped with the step face on the movable positioning board, the step face is hugged closely motor cylindrical inner chamber slot wedge surface under the cylinder effect and is removed, works as the step face removes motor slot wedge tip and breaks away from the slot wedge, utilizes the difference in height of step face, under the cylinder effect, the movable positioning board takes place the displacement, responds to through the micro-gap switch that sets up being close to movable positioning board the displacement is controlled the cutting head stops moving, and milling cutter starts the cutting, accomplishes location and cutting work.
Furthermore, the number of the movable positioning plates is two, the movable positioning plates are respectively a first movable positioning plate and a second movable positioning plate, the step surface on the first movable positioning plate is Z-shaped and used for positioning the end part of the right end of the motor slot wedge, and the step surfaces on the second movable positioning plate are opposite and used for positioning the end part of the left end of the motor slot wedge.
Further, the fixed positioning plate comprises a first panel, a second panel, a third panel and a fourth panel which are sequentially arranged on the fixed positioning plate, a first cavity, a second cavity and a third cavity are sequentially formed among the first panel, the second panel, the third panel and the fourth panel, a first movable positioning plate and a second movable positioning plate are respectively arranged in the first cavity and the third cavity, and the milling cutter penetrates out of the second cavity.
Further, the method specifically comprises the following steps:
s1, determining the coordinates of the initial right end starting point and the initial left end terminal point of the slot wedge in the axial direction according to the motor structure.
S2, positioning and cutting the coordinates of the starting point of the right end of the motor slot wedge: the cutting head extends into a cylindrical inner cavity of the motor and is close to the initial right end starting point coordinate, and the cylinder pushes the first movable positioning plate to move downwards until the first movable positioning plate touches a slot wedge of a stator coil of the motor and stops moving; the cutting head moves towards the right end, when the step surface of the first movable positioning plate moves to the right end of the motor slot wedge and moves out, the first movable positioning plate moves under the pressure of the cylinder, a microswitch is triggered, the cutting head is controlled to stop moving, the central axis of the milling cutter is just positioned right above the end of the slot wedge at the moment, and the actual starting point coordinate of the right end of the motor slot wedge is obtained; and starting the milling cutter, rotating to the rated rotating speed, and completing slotting at the actual starting point of the right end of the slot wedge of the motor.
S3, positioning and cutting the left end terminal point coordinate of the motor slot wedge: the cutting head extends into the cylindrical inner cavity of the motor and is close to the initial left end terminal point coordinates; the cylinder pushes the second movable positioning plate to move downwards until the second movable positioning plate touches slot wedges of a stator coil of the motor to stop moving; the cutting head moves towards the end part of the left end of the motor slot wedge, when the step surface of the second movable positioning plate moves to the end part of the left end of the motor slot wedge and moves out, the second movable positioning plate moves under the pressure of the cylinder, a microswitch is triggered, the cutting head is controlled to stop moving, the central axis of the milling cutter is just positioned right above the end part of the left end of the motor slot wedge, and the actual left end terminal point coordinate of the motor slot wedge is obtained; and starting the milling cutter, rotating to the rated rotating speed, and finishing the slotting of the actual left end terminal point of the motor slot wedge.
S4, slot wedge cutting: after the slotting operation of the actual left end terminal point coordinate of the motor slot wedge is finished, the milling cutter does not need to leave a cutting area, the milling cutter can enter the full-line slotting operation, and the cutting head cuts from the actual left end terminal point coordinate to the actual right end starting point coordinate to finish the slot wedge cutting.
The invention also provides a concrete structure of a device for positioning and cutting the motor slot wedge, which comprises a motor support and a cutting mechanism arranged on one side of the motor support, wherein the motor support is hollow and is used for placing a servo motor and a speed reducer, and the rotation speed of the motor can be better controlled through the servo motor;
the motor support is provided with a roller shaft and an annular tool matched with the roller shaft for use, the annular tool comprises a first clamping plate and a second clamping plate, the motor is axially and horizontally arranged between the first clamping plate and the second clamping plate, the first clamping plate and the second clamping plate are matched and fixed with the motor through a spigot of an end cover of the motor, the first clamping plate and the second clamping plate can ensure that the positions of central axes of different motors are basically consistent, the first clamping plate is provided with a large gear, the large gear is meshed with a small gear arranged on the roller shaft, the large gear is meshed with the small gear, the motor can be prevented from being misplaced due to sliding during indexing rotation, and the continuous and accurate rotation of the motor can be ensured to the maximum extent; a pinion is arranged at one end of the roller shaft, so that the accuracy of the rotation angle of the motor can be ensured through gear transmission, and the pinion can also be used as a positioning device in the axial direction of the motor to ensure the consistency of starting points during the cutting processing of slot wedges of motors of the same type; the roller shaft is also provided with an encoder for controlling the rotation angle of the motor, and the specific mode is that the encoder feeds back to control the servo motor to realize the rotation angle of the roller shaft.
The cutting mechanism comprises a movable upright post, a horizontal bracket capable of moving up and down on the movable upright post, and a cutting head arranged on the horizontal bracket through a supporting plate, wherein the horizontal bracket is provided with a guide rail for the horizontal movement of the supporting plate, and the cutting mechanism also comprises a displacement sensor for measuring and recording displacement data of the movable upright post, the displacement data of the horizontal bracket on the movable upright post and the displacement data of the supporting plate on the horizontal bracket;
the cutting head may extend into the cylindrical interior cavity of the motor and cut axially along the motor.
Further, the cutting head comprises a milling cutter, a milling cutter mounting frame, an adjusting plate and a positioning mechanism for controlling the cutting depth of the milling cutter;
the milling cutter mounting frame is fixedly arranged at one end of the adjusting plate, the adjusting plate is mounted on the supporting plate through a pin, the adjusting plate can rotate around the pin, the other end of the adjusting plate is connected with a first air cylinder arranged on the supporting plate, and the first air cylinder pulls the other end of the adjusting plate to move upwards along the vertical direction; after the first cylinder is pulled upwards, one end of the adjusting plate slowly moves downwards, so that the milling cutter, the milling cutter mounting frame and the positioning mechanism for controlling the cutting depth of the milling cutter are abutted to the surface of a slot wedge on the lower part of the inner cavity of the motor, and a cutting procedure is carried out;
the positioning mechanism comprises a fixed positioning plate, a first movable positioning plate and a second movable positioning plate, wherein the first movable positioning plate and the second movable positioning plate are arranged on the milling cutter mounting frame and work in a staggered mode, the fixed positioning plate is used for positioning the full-line grooving depth of the slot wedge, the upper position and the lower position of the fixed positioning plate are adjustable through the arranged waist-shaped hole, and the movable positioning plate is used for grooving and positioning the end portion of the slot wedge.
The fixed positioning plate sequentially comprises a first panel, a second panel, a third panel and a fourth panel, a first cavity, a second cavity and a third cavity are sequentially formed among the first panel, the second panel, the third panel and the fourth panel, a first movable positioning plate and a second movable positioning plate are respectively arranged in the first cavity and the third cavity, and the milling cutter penetrates out of the second cavity;
one ends of the first movable positioning plate and the second movable positioning plate are fixedly mounted on the milling cutter mounting frame through pin bolts, the end parts of the other ends of the first movable positioning plate and the second movable positioning plate are respectively provided with a first microswitch and a second microswitch in a matched manner and are respectively connected with a second cylinder and a third cylinder which are mounted on the milling cutter mounting frame, the second cylinder and the third cylinder can respectively push the other ends of the first movable positioning plate and the second movable positioning plate downwards along the vertical direction, and step surfaces are respectively arranged on the first movable positioning plate and the second movable positioning plate; the first microswitch and the second microswitch can sense the moment that the first movable positioning plate and the second movable positioning plate leave the end part of the motor slot wedge, so as to ensure that the central axis of the milling cutter is accurately positioned right above the starting point or the terminal point of the slot wedge, and in order to ensure the reliability of position sensing, the first movable positioning plate and the second movable positioning plate can be provided with 2 microswitches;
the first movable positioning plate and the second movable positioning plate extend into the cylindrical inner cavity of the motor along with the cutting head, the first movable positioning plate or the second movable positioning plate works and moves along the surface of the slot wedge, and when the step surface moves to the end part of the motor slot wedge and leaves, the second cylinder or the third cylinder pushes the first movable positioning plate or the second movable positioning plate to move downwards, and triggers the first microswitch or the second microswitch to control the cutting head to stop moving, so that the end part of the motor slot wedge is positioned.
Further, the dust removing device comprises a movable dust removing device arranged on the other side of the motor.
Furthermore, the cutting head further comprises a sliding rail which is arranged on the side surface of the motor support and matched with the movable upright post, the sliding rail is arranged in a manner of being vertical to the axial direction of the motor, the movable upright post moves on the sliding rail, displacement data are obtained by measuring through a displacement sensor, and the coincidence between the center of the cutting head and the center of the motor can be determined more accurately and rapidly; but movable stand bottom is connected with scalable steel sheet protection casing, scalable steel sheet protection casing covers the slide rail, scalable steel sheet protection casing has guaranteed the level and smooth of operation ground, has higher intensity and rigidity, can ensure to bear workman's weight, makes things convenient for the operative employee to normally work, can shelter from on-the-spot dust simultaneously and can not fall on the slide rail.
Furthermore, the number of the encoders is 2, wherein 1 is used for motion feedback, and the other 1 is used for checking the consistency of the 1 st feedback data, so that the accuracy and the reliability of each rotation angle of the motor can be ensured.
Further, the horizontal stand height is adjusted through the hand wheel, the hand wheel is located portable stand top adjusts the height that the horizontal stand is located portable stand through the hand wheel, and cooperation displacement sensor can ensure the distance height that the relative different model motor slot wedges of quick adjustment cutting head correspond.
Furthermore, a spring is arranged between the other end of the adjusting plate and the first cylinder and is perpendicular to the adjusting plate, and the arrangement of the spring ensures that the milling cutter can be quickly lifted under the condition of power failure or pressure failure, so that the motor cannot be damaged by the milling cutter.
Further, still including setting up the stop gear on the layer board, stop gear is located regulating plate upper portion just is located between regulating plate other end and the pin.
Furthermore, the directions of the step surfaces on the first movable positioning plate and the second movable positioning plate are opposite, the step surface on the first movable positioning plate is Z-shaped and is used for positioning the right end of the motor slot wedge, and the step surface on the second movable positioning plate is used for positioning the left end of the motor slot wedge; the positioning of the end faces of the two ends of the motor can be completed by the step faces in opposite directions, so that the extended coil cannot be cut in the cutting process, and the damage of the coil and the integrity of the coil are avoided.
Further, the lower part of the second panel and/or the third panel is provided with a bulge.
The beneficial effects are as follows:
the motor slot wedge positioning and cutting method can realize the positioning of the end part of the motor slot wedge by moving the two movable positioning plates to the end part on the surface of the motor slot wedge and sensing the displacement generated by the movable positioning plates by the micro switch, controls the cutting depth by setting the fixed positioning mechanism, avoids the damage to a coil in the cutting process, avoids the damage to an external coil by a double positioning mode of a starting point and an end point, and improves the efficiency and the reliability of the cutting of the motor slot wedge.
Drawings
FIG. 1 is a schematic view of a motor slot wedge cutting apparatus according to embodiment 1;
FIG. 2 is a schematic view showing a structure of a cutting head and a horizontal support according to embodiment 1;
FIG. 3 is a schematic plan view of a fixed positioning plate according to embodiment 1;
FIG. 4 is a perspective view of the fixed positioning plate according to embodiment 1;
FIG. 5 is a schematic view of a movable positioning plate according to embodiment 1;
FIG. 6 is a schematic view of a movable positioning plate according to embodiment 1;
FIG. 7 is a schematic view of a cutting head structure according to example 1;
FIG. 8 is a perspective view of a cutting head structure according to example 1;
FIG. 9 is a schematic view showing a state of preparation for end point cutting in the cutting head according to embodiment 2;
FIG. 10 is an enlarged view of a state ready for end point cutting in the cutting head according to embodiment 2;
FIG. 11 is a schematic view showing the end point cutting positioning state of the cutting head according to embodiment 2;
FIG. 12 is an enlarged view showing the end point cutting positioning state of the cutting head according to embodiment 2;
FIG. 13 is a schematic view showing a cutting positioning state of a starting point of a cutting head according to embodiment 2;
FIG. 14 is an enlarged view of the cutting positioning state of the cutting head at the starting point in embodiment 2.
Detailed Description
The present invention will be further described with reference to the following embodiments.
Example 1
As shown in fig. 1 to 8, the present embodiment provides a motor slot wedge cutting device, including a motor support 2 and a cutting mechanism 3 disposed on one side of the motor support 2, the interior of the motor support 2 is hollow, and is used for placing a servo motor and a speed reducer, and the rotation speed of the motor can be better controlled through the servo motor.
The roller shaft 20 and the annular tool 21 matched with the roller shaft 20 for use are arranged on the motor support 2, the annular tool 21 comprises a first clamping plate 211 and a second clamping plate 212, the motor 4 is axially and horizontally arranged between the first clamping plate 211 and the second clamping plate 212, the first clamping plate 211 and the second clamping plate 212 are matched and fixed with the motor 4 through a spigot of an end cover of the motor, the first clamping plate 211 and the second clamping plate 212 can ensure that the positions of central axes of different motors are basically consistent, a large gear 5 is arranged on the first clamping plate 211, the large gear 5 is meshed with a small gear 200 arranged on the roller shaft 20, the meshing can ensure that the motor 4 cannot be dislocated due to sliding during indexing rotation, and the continuous and accurate rotation of the motor 4 can be ensured to the maximum extent; a pinion is arranged at one end of the roller shaft, so that the accuracy of the rotation angle of the motor can be ensured through gear transmission, and the pinion can also be used as a positioning device in the axial direction of the motor to ensure the consistency of starting points during the cutting processing of slot wedges of motors of the same type; the roller shaft 20 is further provided with an encoder 201 for controlling the rotation angle of the motor, specifically, the encoder 201 controls the servo motor to realize the rotation angle of the roller shaft 20 through feedback.
The cutting mechanism 3 comprises a movable upright post 30, a horizontal bracket 31 which can move up and down on the movable upright post 30 and a cutting head 1 which is arranged on the horizontal bracket 31 through a supporting plate 15, wherein a guide rail 6 for the horizontal movement of the supporting plate 15 is arranged on the horizontal bracket 31; in this embodiment, the device further comprises a displacement sensor for measuring and recording displacement data of the movable column, displacement data of the horizontal support on the movable column, and displacement data of the pallet on the horizontal support.
The cutting head 1 can be inserted into the cylindrical inner cavity of the motor 4 and cut along the axial direction of the slot wedge of the motor 4.
The cutting head 1 comprises a milling cutter 10, a milling cutter mounting 11, an adjusting plate 12 and a positioning mechanism 13 for controlling the cutting depth of the milling cutter.
The milling cutter mounting frame 11 is fixedly arranged at one end of the adjusting plate 12, the adjusting plate 12 is mounted on the supporting plate 15 through a pin, the adjusting plate 12 can rotate around the pin, the other end of the adjusting plate 12 is connected with a first air cylinder 16 arranged on the supporting plate 15, and the first air cylinder 16 pulls the other end of the adjusting plate 12 to move upwards along the vertical direction; after the first air cylinder 16 is pulled upwards, one end of the adjusting plate 12 slowly moves downwards, so that the milling cutter 10, the milling cutter mounting frame 11 and the positioning mechanism 13 for controlling the cutting depth of the milling cutter abut against the surface of the slot wedge on the lower part of the inner cavity of the motor, and a cutting process is carried out.
The positioning mechanism 13 comprises a fixed positioning plate 17 arranged on the milling cutter mounting rack 11 and a first movable positioning plate 18 and a second movable positioning plate 18-1 which work in a staggered manner; the fixed positioning plate 17 is used for positioning the full-line slotting depth of the slot wedge, the upper and lower positions of the fixed positioning plate are adjustable through the arranged waist-shaped holes, and the movable positioning plate is used for slotting and positioning the end part of the slot wedge.
The fixed positioning plate comprises a first panel 171, a second panel 172, a third panel 173 and a fourth panel 174 in sequence, a first cavity 175, a second cavity 176 and a third cavity 177 are formed between the first panel 171, the second panel 172, the third panel 173 and the fourth panel 174 in sequence, the first movable positioning plate 18 and the second movable positioning plate 18-1 are respectively arranged in the first cavity 175 and the third cavity 177, and the milling cutter 10 penetrates out of the second cavity 176.
One ends of the first movable positioning plate 18 and the second movable positioning plate 18-1 are fixedly arranged on the milling cutter mounting frame 11 through pin bolts, the end parts of the other ends are respectively provided with a first micro switch 19 and a second micro switch 19-1 in a matched manner and are respectively connected with a second air cylinder 160 and a third air cylinder 160-1 which are arranged on the milling cutter mounting frame 11, the second air cylinder 160 and the third air cylinder 160-1 can push the other ends of the first movable positioning plate 18 and the second movable positioning plate 18-1 downwards along the vertical direction, and step surfaces 180 are respectively arranged on the first movable positioning plate 18 and the second movable positioning plate 18-1; the first microswitch 19 and the second microswitch 19-1 can respectively sense the moment that the first movable positioning plate 18 and the second movable positioning plate 18-1 leave the end part of the slot wedge, so as to ensure that the central axis of the milling cutter is accurately positioned right above the starting point or the ending point of the slot wedge, and 2 microswitches can be respectively arranged on the first movable positioning plate 18 and the second movable positioning plate 18-1 in order to ensure the reliability of position sensing.
As shown in fig. 13 and 14, the first movable positioning plate 18 extends into the cylindrical inner cavity of the motor 4 along with the cutting head 1 and moves along the surface of the slot wedge, and at the moment that the step surface 180 moves to the right end of the motor slot wedge and leaves, the second cylinder 160 pushes the first movable positioning plate 18 to move downwards, and the microswitch 19 is triggered to control the cutting head 1 to stop moving, so that the positioning of the right end of the motor slot wedge is completed; the positioning mode of the left end part of the motor slot wedge is the same and is completed through the second movable positioning plate 18-1.
The embodiment also comprises a movable dust-removing device 7 arranged on the other side of the motor.
Still including setting up at motor support 2 side and portable stand 30 complex slide rail, the slide rail sets up with motor axial is perpendicular, portable stand 30 moves on the slide rail, portable stand 30 bottom is connected with scalable steel sheet protection casing 8, scalable steel sheet protection casing 8 covers the slide rail, in this embodiment, the slide rail sets up in the recess, guarantee the level and smooth of operation ground through scalable steel sheet protection casing 8, higher intensity and rigidity have, can ensure to bear workman's weight, make things convenient for the operation workman to normally work, can shelter from on-the-spot dust simultaneously and can not fall on the slide rail.
In this embodiment, the number of the encoders 201 is 2, wherein 1 is used for motion feedback, and the other 1 is used for checking the consistency of the 1 st feedback data, so that the accuracy and reliability of each rotation angle of the motor 4 can be ensured.
In this embodiment, the height of horizontal stand 31 is adjusted through hand wheel 9, and hand wheel 9 is located portable stand 30 top, adjusts the height that horizontal stand 31 is located portable stand 30 through hand wheel 9, and in this embodiment, cooperation displacement sensor can ensure the distance height that quick adjustment cutting head 1 corresponds to different model motor slot wedges relatively.
In this embodiment, a spring 22 is disposed between the other end of the adjusting plate 12 and the first cylinder 16, the spring 22 is perpendicular to the adjusting plate 12, and the arrangement of the spring 22 ensures that the milling cutter can be lifted up quickly under the condition of power loss or voltage loss, thereby ensuring that the milling cutter does not damage the motor 4.
In the embodiment, the device further comprises a limiting mechanism 23 arranged on the supporting plate 15, wherein the limiting mechanism 23 is positioned at the upper part of the adjusting plate 12 and between the other end of the adjusting plate and the pin; in this embodiment the adjustment plate end is referred to as being near the cutting head end and the adjustment plate end is referred to as being near the first cylinder end.
In this embodiment, as shown in fig. 5 and 6, the directions of the step surfaces 180 on the first movable positioning plate 18 and the second movable positioning plate 18-1 are opposite, the step surface 180 on the first movable positioning plate 18 is Z-shaped and is used for positioning the right end of the slot wedge of the motor, the step surface on the second movable positioning plate 18-1 is used for positioning the left end of the slot wedge of the motor, and the step surfaces opposite in direction can complete the positioning of the end surfaces at the two ends of the slot wedge of the motor 4, so as to ensure that the extended coil cannot be cut in the cutting process, avoid the damage of the coil and ensure the integrity of the coil.
In this embodiment, the lower portions of the second panel 172 and the third panel 173 are provided with the protrusions 24.
Example 2
As shown in FIGS. 9 to 14, the embodiment provides a motor slot wedge positioning and cutting method, a positioning mechanism 13 is disposed at a milling cutter of a cutting head 1, the positioning mechanism 13 comprises a first movable positioning plate 18, a second movable positioning plate 18-1, and a fixed positioning plate 17 for limiting the cutting depth of the milling cutter 10, a step surface 180 is disposed on the first movable positioning plate 18 and the second movable positioning plate 18-1, the step surface 180 moves along the surface of the slot wedge of the cylindrical inner cavity of the motor 4 under the action of an air cylinder, when the step surface 180 moves to the end of the slot wedge of the motor 4 and is separated from the slot wedge, the first movable positioning plate 18 or the second movable positioning plate 18-1 is displaced under the action of the air cylinder by utilizing the height difference of the step surface 180, the displacement is induced by a microswitch 19 or 19-1 disposed near the first movable positioning plate 18 and the second movable positioning plate 18-1, and the cutting head 1 is controlled to stop moving, the milling cutter 10 is started to cut, and the positioning and cutting work is completed.
The method specifically comprises the following steps:
and determining the coordinates of the initial right end starting point and the initial left end terminal point of the slot wedge in the axial direction according to the motor structure.
As shown in fig. 13 to 14, referring to fig. 1 to 8, when the cutting head 1 extends into the cylindrical cavity of the motor 4 through the horizontal bracket 31 to a position close to the initial right-end start coordinate of the motor slot wedge, the second cylinder 160 pushes the first movable positioning plate 18 to move downward until the first movable positioning plate 18 touches the slot wedge of the stator coil of the motor and stops moving; the cutting head 1 moves towards the right end part of the motor slot wedge along with the horizontal support, when the step surface of the first movable positioning plate 18 moves to the right end part of the motor slot wedge and moves out, the first movable positioning plate 18 can move down rapidly under the pressure of the second air cylinder 160 to trigger the first microswitch 19, the cutting head 1 is controlled to stop moving, the central axis of the milling cutter is just positioned right above the right end part of the motor slot wedge, and the actual right end starting point coordinate of the motor slot wedge is obtained through the displacement sensor; starting the milling cutter, rotating to a rated rotating speed, and preparing to open a slot at the starting point of the actual right end of the slot wedge of the motor; the first air cylinder 16 pulls the other end of the adjusting plate 12 to move upwards along the vertical direction, and the cutting head 1 slowly enters a cutting area to finish the cutting of the actual right end starting point coordinate of the motor slot wedge.
As shown in fig. 9-12, the motor slot wedge left end terminal point cutting is shown, and as can be seen from fig. 1-8, the cutting head 1 extends into the cylindrical inner cavity of the motor 4 through the horizontal bracket 31 to be close to the initial left end terminal point coordinates of the motor slot wedge; the third air cylinder 160-1 pushes the second movable positioning plate 18-1 to move downwards until the second movable positioning plate 18-1 touches the slot wedge of the stator coil of the motor and stops moving; the cutting head 1 moves towards the end part of the left end of the motor slot wedge along with the horizontal support 31, when the step surface of the second movable positioning plate 18-1 moves to the end part of the left end of the motor slot wedge and moves out, the second movable positioning plate 18 can move down rapidly under the pressure of a third air cylinder 160-1 to trigger a second microswitch 19-1, the cutting head 1 is controlled to stop moving, the central axis of the milling cutter 10 is just positioned right above the end part of the left end of the motor slot wedge, and the actual left end terminal point coordinate of the motor slot wedge is obtained through a displacement sensor; starting the milling cutter 10, rotating to a rated rotating speed, and preparing for slotting the actual left end terminal point of the motor slot wedge; the first air cylinder 16 pulls the other end of the adjusting plate 12 to move upwards along the vertical direction, and the cutting head 1 slowly enters a cutting area to finish the coordinate cutting of the actual left end terminal point of the motor slot wedge.
And (3) cutting a slot wedge:
after the actual left end terminal point slotting work of the motor slot wedge is finished, the milling cutter does not need to leave a cutting area, the milling cutter can enter the full-line slotting work, and according to the actual right end starting point coordinate of the motor slot wedge obtained by the displacement sensor, the cutting head cuts the actual left end terminal point coordinate of the motor slot wedge to the actual right end starting point coordinate, so that the motor slot wedge cutting is finished.
When the next slot wedge needs to be cut, the annular tool is rotated, and the motor accurately rotates for a certain angle under the accurate control of the servo motor and the encoder, so that the cutting work of the next slot wedge is realized.
It should be understood that the above examples are only for clearly illustrating the technical solutions of the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection of the claims of the present invention.
Claims (6)
1. The motor slot wedge positioning and cutting method is characterized in that a positioning mechanism is arranged at a milling cutter of a cutting head, the positioning mechanism comprises a movable positioning plate and a fixed positioning plate for limiting the cutting depth of the milling cutter, and the fixed positioning plate comprises a fixed positioning plate
The positioning plate sequentially comprises a first panel, a second panel, a third panel and a fourth panel, and a first cavity, a second cavity and a third cavity are sequentially formed among the first panel, the second panel, the third panel and the fourth panel; the number of the movable positioning plates is two, the movable positioning plates are respectively a first movable positioning plate and a second movable positioning plate, the first movable positioning plate and the second movable positioning plate are respectively arranged in the first cavity and the third cavity, and the milling cutter penetrates out of the second cavity; the movable positioning plates are provided with step surfaces, the step surfaces on the first movable positioning plate are Z-shaped and used for positioning the end part of the right end of the motor slot wedge, and the step surfaces on the second movable positioning plate are opposite and used for positioning the end part of the left end of the motor slot wedge; the cutting machine also comprises a cutting mechanism used for moving the cutting head, wherein the cutting mechanism comprises a movable upright post and a horizontal bracket capable of moving up and down on the movable upright post, the cutting head is installed on the horizontal bracket through a supporting plate, and the horizontal bracket is provided with a guide rail used for the horizontal movement of the supporting plate; the cutting head further comprises a milling cutter mounting frame and an adjusting plate; the milling cutter mounting frame is fixedly arranged at one end of the adjusting plate, the adjusting plate is mounted on the supporting plate through a pin, the adjusting plate can rotate around the pin, the other end of the adjusting plate is connected with a first air cylinder arranged on the supporting plate, and the first air cylinder pulls the other end of the adjusting plate to move up and down along the vertical direction; the step surface is tightly attached to the surface of a slot wedge of a cylindrical inner cavity of the motor to move under the action of the cylinder, when the step surface moves to the end part of the slot wedge of the motor and is separated from the slot wedge, the movable positioning plate is displaced under the action of the cylinder by utilizing the height difference of the step surface, the movable positioning plate induces the displacement and controls the cutting head to stop moving through a microswitch arranged close to the movable positioning plate, and the milling cutter is started to cut to complete the positioning and cutting work.
2. The motor slot wedge positioning and cutting method according to claim 1, comprising the steps of:
s1, determining the coordinates of an initial right end starting point and an initial left end terminal point of a slot wedge in the axial direction according to a motor structure;
s2, positioning and cutting the coordinates of the starting point of the right end of the motor slot wedge: the cutting head extends into the cylindrical inner cavity of the motor and is close to the starting point of the initial right end
The air cylinder pushes the first movable positioning plate to move downwards until the first movable positioning plate touches the slots of the stator coil of the motor
The wedge stops moving; the cutting head moves to the right end part, and when the step surface of the first movable positioning plate moves to the motor slot wedge
At the right end and at the moment of moving out, the first movable positioning plate is displaced under the pressure of the cylinder to trigger the microswitch to control
The cutting head stops moving, the central axis of the milling cutter is just positioned right above the end part of the slot wedge at the moment, and the right end of the motor slot wedge is obtained
Actual starting point coordinates; starting the milling cutter, rotating to a rated rotating speed, and completing slotting at the actual starting point of the right end of the slot wedge of the motor;
s3, positioning and cutting the coordinates of the left end terminal point of the motor slot wedge: the cutting head extends into the cylindrical inner cavity of the motor and is close to the initial left end terminal point
Coordinates; the cylinder pushes the second movable positioning plate to move downwards until the second movable positioning plate touches the slots of the stator coil of the motor
The wedge stops moving; the cutting head moves towards the end part of the left end of the slot wedge of the motor, and when the step surface of the second movable positioning plate moves to the electricity
At the moment of moving out the left end part of the slot wedge of the engine, the second movable positioning plate displaces under the pressure of the cylinder to trigger the micromotion
The switch controls the cutting head to stop moving, at the moment, the central axis of the milling cutter is just positioned right above the end part of the left end of the motor slot wedge,
acquiring the actual left end terminal point coordinate of the motor slot wedge; starting the milling cutter, rotating to rated speed to complete the actual left end of the motor slot wedge
Slotting at the end point;
s4, slot wedge cutting: after the slotting work of the actual left end terminal point coordinate of the slot wedge of the motor is finished, the milling cutter does not need to leave a cutting area, the milling cutter can enter the full-line slotting work, the cutting head cuts from the actual left end terminal point coordinate to the actual right end starting point coordinate, and the slotting is finished
And (5) wedge cutting.
3. The method for positioning and cutting the motor slot wedge according to claim 1, further comprising providing a motor support, wherein the motor support is provided with a roller shaft and an annular tool used in cooperation with the roller shaft, the annular tool comprises a first clamping plate and a second clamping plate, the motor is axially and horizontally arranged between the first clamping plate and the second clamping plate, the first clamping plate is provided with a large gear, the large gear is meshed with a small gear arranged on the roller shaft, and the roller shaft is further provided with an encoder for controlling the rotation angle of the motor; when the next slot wedge needs to be cut, the annular tool is rotated, and the motor accurately rotates by a certain angle under the accurate control of the servo motor and the encoder, so that the cutting and positioning work of the next slot wedge is realized.
4. The motor slot wedge positioning and cutting method according to claim 1, further comprising a slide rail disposed on a side surface of the motor bracket and engaged with the movable post, the slide rail being disposed perpendicular to an axial direction of the motor, the movable post moving on the slide rail, a bottom portion of the movable post being connected to a retractable steel plate shield, the retractable steel plate shield covering the slide rail.
5. The motor slot wedge positioning and cutting method of claim 1, wherein the horizontal bracket height is adjusted by a hand wheel located at the top of the movable post.
6. The motor slot wedge positioning and cutting method according to claim 1, wherein a protrusion is provided at a lower portion of the second panel and/or the third panel.
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