A square stator punching lamination stack and its stacking method

Abstract

The present invention relates to the field of stator core lamination technology and equipment technology for servo motors with spindle feed and other functions for various CNC machine tools, and specifically to a square stator punching lamination lamination and lamination method thereof. It includes a bottom tire, a lower pressure ring, an upper pressure ring, an upper pressure ring, a core shaft, and an expansion sleeve; a positioning groove is arranged at the center of the upper surface of the bottom tire, and a primary step portion and a secondary step portion are arranged from the inside to the outside and from top to bottom on the periphery of the positioning groove, and an expansion sleeve is placed inside the positioning groove, and the inner diameter of the expansion sleeve matches the outer diameter of the core shaft, and a lower pressure ring is arranged on the outer clearance of the primary step portion, and the lower pressure ring is arranged on the upper part of the secondary step portion; the upper pressure ring includes an upper plate, a lower plate, and a plurality of support rods connecting the upper plate and the lower plate together, and a convex portion is arranged at the bottom of the lower plate, and an upper pressure ring is arranged on the periphery of the convex portion, and a plurality of bolt holes are arranged on the lower plate. Its structure is more reasonable, easy to operate, and can ensure that the laminated core is neat inside and outside.

Description

Technical Field

[0001] The invention relates to the technical field of stator core lamination technology and equipment of servo motors with spindle feeding and other functions of various numerical control machine tools, and in particular to a square stator punching lamination tire and a lamination method thereof. Background Art

[0002] Most of the motors used for CNC machine tool spindle feed and other mechanical feed functions are directly connected to the machine tool spindle part or other feed part. This type of motor cannot be installed outside the machine tool like the motors used in ordinary machine tools. It is basically installed inside the machine tool, so its size should be as small as possible and the heat dissipation should be fast. The motor housing is no longer used. The motor stator punching is slightly enlarged as the housing, and the shape is designed to be square for easy installation.

[0003] Generally, this type of motor stator lamination uses a round mandrel and expansion sleeve. The inner circle of the stator punching sheet is placed outside the expansion sleeve, and the mandrel is tightened to complete the lamination. Orientation selects two symmetrical slots and installs two slot sample rods. The buckle is pressed into the buckle slot of the punching sheet and fastened to fix it. The two ends are flattened and welded to the pressure ring. The servo motor core is fixed with eight long bolts, which are inserted from the upper pressure ring to the lower pressure ring and tightened to fix it. The fit between the bolt and the punching sheet is a clearance fit, so the appearance always appears uneven. Summary of the invention

[0004] In view of the defects of the prior art, the object of the present invention is to provide a square stator punching stack, which has a more reasonable structure, is easy to operate, and can ensure that the stacked core is neat inside and outside.

[0005] To achieve the above-mentioned purpose, the technical solution provided by the present invention is a square stator punching laminated tire, which includes a bottom tire, a lower pressure ring, an upper pressure ring, an upper pressure ring, a core shaft and an expansion sleeve; a positioning groove is arranged at the center of the upper surface of the bottom tire, and a primary step portion and a secondary step portion are arranged from the inside to the outside and from top to bottom on the periphery of the positioning groove, an expansion sleeve is placed inside the positioning groove, and the inner diameter of the expansion sleeve matches the outer diameter of the core shaft, and a lower pressure ring is fitted in the outer gap of the primary step portion, and the lower pressure ring is arranged on the upper part of the secondary step portion; the upper pressure ring includes an upper plate, a lower plate and a plurality of support rods connecting the upper plate and the lower plate together, a convex portion is arranged at the bottom of the lower plate, an upper pressure ring is mounted on the periphery of the convex portion, and a plurality of bolt holes are arranged on the lower plate.

[0006] Based on the above technical solution, the lower stop of the bottom tire structure cooperates with the stacking machine, the upper inner stop is set for placing and positioning the expansion sleeve, the core shaft is placed inside, the upper outer stop is used for positioning the lower pressure ring, and the stop and the pressure ring are clearance-matched to achieve easy entry and exit.

[0007] Preferably, the support rod is an iron rod, and the upper plate and the lower plate are connected by welding the iron rod. The length of the iron rod, that is, the length of the support rod, is determined according to the different heights of the iron cores of different specifications, so as not to manufacture too many tools and achieve versatility.

[0008] It should be noted that the upper tire pressure plate can be made of an upper and lower plate and several small iron rods welded together in the middle. The shape of the lower plate is the same as the size of the square boss of the lower pressure plate. The difference is that the lower plate has eight holes for inserting bolts. The shape of the upper plate can be smaller than the lower one, but four notches need to be added to facilitate the tightening of the bolts with a threaded wrench.

[0009] Furthermore, the laminated tire also includes a tire shape adjustment component, which includes two right-angle baffles, each of which includes a side fixing plate and a front and rear fixing plate that are detachably connected to each other at right angles; the two right-angle baffles can be spliced ​​into a square, a hinge seat is set at the end of the side fixing plate of the right-angle baffle, and a fixing seat is set at the end of the front and rear fixing plate of the right-angle baffle, and the hinge seat and the fixing seat at the corresponding position are fixed by a hinge rod and a nut; and tightening screws are set on the front and rear fixing plates.

[0010] Based on the above technical solution, in order to ensure the neat appearance, an appearance arrangement sleeve (appearance arrangement tire assembly) is provided. This arrangement sleeve can not only move freely, but also be locked firmly, and can also facilitate the arrangement of punching sheets.

[0011] Preferably, the upper plate and the lower plate are both square plates, the size of the upper plate is smaller than that of the lower plate, and four notches are respectively arranged on the four sides of the upper plate.

[0012] Based on the above technical solution, four notches are added to facilitate the tightening of the bolts with a threaded wrench.

[0013] Furthermore, the width of the first-level step portion is smaller than the width of the lower pressing ring.

[0014] Based on the above technical solution, the outer dimensions of the square boss on the bottom tire are smaller than the outer dimensions of the pressing ring, and it is an outer finishing ring, leaving space for finishing the pressing ring and punching sheets.

[0015] Furthermore, the bottom tire is a square structure, two connecting plates are respectively installed on two opposite sides, and two rectangular gaps are respectively arranged on the two sides where the connecting plates are not installed.

[0016] Based on the above technical solution, in order to reduce the weight of the bottom tire and enable the outer finishing ring to move freely on the bottom tire, two connecting plates can be installed on the left and right sides of the bottom tire, and two rectangular gaps are required at the front and back. The size of the gap is enough to use the lifting jaws to freely enter and exit the bottom tire.

[0017] Furthermore, after the inner and outer circles of the expansion sleeve are processed, they are cut into three equal parts, each 3 to 4 mm smaller. At this time, the outer diameter of the expansion sleeve is 3 to 5 mm smaller than the inner diameter of the punching sheet.

[0018] Furthermore, the inner diameter of the expansion sleeve and the mandrel adopt a self-locking angle, and when the mandrel and the expansion sleeve self-locking angle are fully matched, the outer diameter of the expansion sleeve is fully tightened. The self-locking angle between the mandrel and the expansion sleeve is between 1 and 3 degrees.

[0019] Based on the above technical solution, in view of the fact that the outer diameter of the expansion sleeve is consistent with the inner diameter of the punching sheet, in order to enable the expansion sleeve to tighten the inner circle of the punching sheet and to facilitate the installation of the punching sheet, the tire pressing of the present invention is cut into three equal parts with each piece being 3 to 4 mm smaller after the expansion sleeve has processed the inner and outer circles. At this time, the outer diameter of the expansion sleeve is smaller than the inner diameter of the punching sheet. The inner diameter of the expansion sleeve and the mandrel adopt a self-locking angle. When the mandrel and the expansion sleeve self-locking angle are fully matched, the outer diameter of the expansion sleeve can be fully tightened. In addition, it should be supplemented that the contact area of ​​the self-locking angle of the mandrel and the expansion sleeve must reach more than 80% during processing.

[0020] On the other hand, the technical solution provided by the present invention also includes a method for stacking square stator punching sheets using the above-mentioned stacking tire. The specific method is that after the base tire is fixed, the expansion sleeve is inserted into the positioning groove of the base tire, the lower pressure ring is installed to the outer periphery of the first-level step portion, the arranged punching sheets are stacked outside the expansion sleeve, the upper pressure tire is installed, the core shaft is pulled downward and pressed, and the height is measured to see if it is qualified. After the height is measured to be qualified, the shape is further arranged, the core shaft is tightened, and the upper pressure tire is pressurized. While pressurizing, several long bolts are inserted into the iron core through the upper pressure tire, the bolts are fixed, and after the sheet is installed, the fixing plate is removed.

[0021] Furthermore, the fixing plates are removed by rotating the compression screws to eject the front and rear fixing plates.

[0022] Furthermore, the further adjustment of the appearance after the measured height is qualified refers to moving the two right-angle baffles relative to each other, observing whether the raised parts of the side surfaces of the front and rear fixing plates can be completely inserted into the side fixing plates. If not or not ideal, the appearance is adjusted again until it can be inserted smoothly. Then, the hinge rods on both sides are placed in their respective hinge seats, the nuts are tightened, and the entire appearance adjustment tire installation is completed.

[0023] Further explanation of the present invention: first, a fixed base tire is installed on the laminating machine, and the table top is required to be relatively large to facilitate the movement of the appearance arrangement circle; second, the inner circle of the stator punching sheet is fixed and arranged using a self-locking angle core shaft and an expansion sleeve; third, in order to ensure the convenience of stator wire embedding, two symmetrical slot sample rods are also designed; fourth, the structural setting of the upper pressing tire can not only hold the punching sheet, but also facilitate the insertion and tightening of eight bolts; fifth, to ensure the neat appearance, an appearance arrangement tire assembly is set, which can not only move freely, but also ensures reliable locking and is convenient for arranging the punching sheets.

[0024] The beneficial effects of the present invention are as follows: the structure is more reasonable and easy to operate, and it can ensure that the laminated cores are neat inside and outside. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 for Figure 1 A partial enlarged view of part A;

[0027] Figure 3 It is a top view of the structure of the present invention;

[0028] Figure 4 It is a schematic diagram of the bottom tire;

[0029] Figure 5 is a side view of the base tire;

[0030] In the figure: 1. upper tire pressure, 2. expansion sleeve, 3. core shaft, 4. groove sample rod, 5. bottom tire, 6. connecting plate, 7. screw, 8. washer, 9. front and rear fixing plates, 10. screw, 11. side fixing plate, 12. hinge seat, 13. hinge rod, 14. fixing seat, 15. nut, 16. clamping screw, 17. primary step portion, 18. secondary step portion, 19. positioning groove, 20. lower pressure ring, 21. upper pressure ring, 22. upper plate, 23. lower plate, 24. support rod. DETAILED DESCRIPTION

[0031] The structure of the present invention is further described below in conjunction with the accompanying drawings.

[0032] A square stator punching laminated tire, comprising a base tire 5, a lower pressing ring 20, an upper pressing tire 1, an upper pressing ring 21, a core shaft 3 and an expansion sleeve 2; a positioning groove 19 is arranged at the center of the upper surface of the base tire, and a primary step 17 and a secondary step 18 are arranged from the inside to the outside and from top to bottom on the periphery of the positioning groove 19, an expansion sleeve 2 is placed inside the positioning groove 19, and the inner diameter of the expansion sleeve 2 matches the outer diameter of the core shaft 3, and a lower pressing ring 20 is fitted in the clearance around the primary step 17, and the lower pressing ring 20 is arranged on the upper part of the secondary step 18; the upper pressing tire 1 comprises an upper plate 22, a lower plate 23 and a plurality of support rods 24 connecting the upper plate 22 and the lower plate 23 together, a convex portion is arranged at the bottom of the lower plate 23, an upper pressing ring 21 is sleeved on the periphery of the convex portion, and a plurality of bolt holes are arranged on the lower plate 23.

[0033] like Figure 1 As shown, the lower stopper of the structure of the bottom tire 5 cooperates with the laminating machine, the upper inner stopper is set for placing and positioning the expansion sleeve 2, the mandrel 3 is placed inside, and the upper outer stopper is used for positioning the lower pressing ring 20. The stopper and the lower pressing ring 20 are clearance-matched to achieve easy entry and exit. In order to reduce the weight of the bottom tire 5, the outer finishing ring can also move freely on the bottom tire 5.

[0034] Preferably, the support rod 24 is an iron rod, and the upper plate 22 and the lower plate 23 are connected by welding. The length of the iron rod, that is, the length of the support rod 24, is determined according to the different heights of the cores of different specifications, so as not to manufacture too many tools and achieve versatility.

[0035] Furthermore, the laminated tire also includes a tire shape adjustment component, which includes two right-angle baffles, each of which includes a side fixing plate 11 and a front and rear fixing plate 9 that are detachably connected to each other at right angles; the two right-angle baffles can be spliced ​​into a square, a hinge seat 12 is set at the end of the side fixing plate 11 of the right-angle baffle, and a fixing seat 14 is set at the end of the front and rear fixing plates of the right-angle baffle, and the hinge seats 12 and fixing seats 14 at corresponding positions are fixed by hinge rods 13 and nuts 15; the front and rear fixing plates 9 are threadedly connected with tightening screws 16.

[0036] like Figure 2 As shown, both the upper plate 22 and the lower plate 23 are square plates. The size of the upper plate 22 is smaller than that of the lower plate 23 , and four notches are respectively arranged on the four sides of the upper plate 22 .

[0037] Furthermore, the width of the first-level step portion 17 is smaller than the width of the lower pressing ring 20 .

[0038] like Figure 1 and Figure 2 As shown, the outer dimensions of the square boss on the bottom tire 5 are smaller than the outer dimensions of the pressing ring, and it is an outer finishing ring, leaving space for finishing the pressing ring and punching.

[0039] Furthermore, the bottom tire 5 is a square structure, two connecting plates 6 are respectively installed on two opposite sides, and two rectangular gaps are respectively set on the two sides where the connecting plates 6 are not installed.

[0040] like Figure 2 As shown, specifically, two connecting plates 6 are installed on the left and right sides of the base tire 5, and two rectangular gaps are required at the front and back. The size of the gaps is sufficient to allow the base tire 5 to be freely entered and exited by the lifting jaws.

[0041] Furthermore, after the inner and outer circles of the expansion sleeve 2 are processed, they are cut into three equal parts, each 3 to 4 mm smaller. At this time, the outer diameter of the expansion sleeve is 3 to 5 mm smaller than the inner diameter of the punching sheet.

[0042] Furthermore, the inner diameter of the expansion sleeve 2 and the mandrel 3 adopt a self-locking angle, wherein the mandrel and the expansion sleeve self-locking angle is between 1 and 3 degrees. When the mandrel 3 and the expansion sleeve 2 self-locking angle are fully matched, the outer diameter of the expansion sleeve 2 is fully tightened.

[0043] Considering that the outer diameter of the expansion sleeve 2 is consistent with the inner diameter of the punch, in order to enable the expansion sleeve to tighten the inner circle of the punch and to facilitate the installation of the punch, the tire pressing 5 of the present invention is cut into three equal parts of 3 to 4 mm each after the inner and outer circles of the expansion sleeve 2 are processed. At this time, the outer diameter of the expansion sleeve is smaller than the inner diameter of the punch. The inner diameter of the expansion sleeve 2 and the mandrel 3 adopt a self-locking angle. When the mandrel 3 and the expansion sleeve 2 self-locking angle are fully matched, the outer diameter of the expansion sleeve 2 can be fully tightened. In addition, it should be supplemented that the contact area of ​​the self-locking angle of the mandrel 3 and the expansion sleeve 2 must reach more than 80% during processing.

[0044] On the other hand, the technical solution provided by the present invention also includes a method for stacking square stator punching sheets using the above-mentioned stacked tires. The specific method is that after the bottom tire 5 is fixed, the core shaft 3 is tightened with the pull-down cylinder, and then the expansion sleeve 2 is inserted into the inner stop of the bottom tire 5. The lower pressure ring is installed first. At this time, the prepared punching sheets are stacked outside the expansion sleeve 2 in a certain direction. At this time, they are pre-arranged, and then the upper pressure tire 1 is installed. The core shaft 3 is pulled downward and pressed tightly on the upper pressure tire 1, and the height is measured to see if it is qualified. After the height is measured and qualified, the shape is further arranged. At this time, the shape of the tire needs to be arranged. The shape of the punching sheet is square. In order to facilitate the use of shape arrangement and fixation, Figure 3 It can be clearly seen that the front and rear fixing plates 9 and the serial side fixing plate 11 are two right-angle baffles fixed together by M12 screws 10. At this time, the two right-angle baffles are moved over to see whether the side protrusions of the front and rear fixing plates 9 can be fully inserted into the side fixing plates 11. If not or not ideal, the shape is adjusted again until it can be smoothly inserted. The hinge rods 13 on both sides are placed in their respective hinge seats 12, and the nuts are tightened. At this time, the entire shape adjustment tire installation is completed. Further adjust the core shape again through the surrounding hollow parts. When it is confirmed that it is completely in place, start the oil cylinder to tighten the mandrel 3, and press the upper tire 1 at the same time. While pressurizing, insert the prepared eight long bolts into the core through the upper tire, and then fix the bolts with a bolt wrench. Under the protection of the external fixing plates (front and rear fixing plates 9 and side fixing plates 11), the punching plate and the pressing ring do not move during the tightening of the bolts. After the installation is completed, the external fixing plate is removed and the front and rear fixing plates 9 are pushed out with the clamping screw 16. The specific process of ejection is that the clamping screw 16 is screwed into a small amount of threads when not working. When the front and rear fixing plates need to be ejected, the clamping screw completely passes through the front and rear fixing plates 9 to push against the side fixing plates 11. At this time, the pushing force generated by the clamping screw 16 causes the boss of the side fixing plate 11 to leave the groove of the front and rear fixing plates 9. The batch core assembly proves that this set of jigs is suitable for the production of servo motor stator cores.

[0045] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the art may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed by the present invention shall still be covered by the claims of the present invention.

Claims

1. Square stator punching lamination stacking tire, characterized by: It includes a bottom tire, a lower pressure ring, an upper tire, an upper pressure ring, a core shaft, and an expansion sleeve; a positioning groove is arranged at the center of the upper surface of the bottom tire, and a primary step portion and a secondary step portion are arranged from the inside to the outside and from the top to the bottom respectively on the periphery of the positioning groove, an expansion sleeve is placed inside the positioning groove, and the inner diameter of the expansion sleeve matches the outer diameter of the core shaft, and a lower pressure ring is matched with the gap outside the primary step portion, and the lower pressure ring is arranged on the upper part of the secondary step portion; the upper tire includes an upper plate, a lower plate and a plurality of support rods connecting the upper plate and the lower plate together, a convex portion is arranged at the bottom of the lower plate, an upper pressure ring is arranged on the periphery of the convex portion, and a plurality of bolt holes are arranged on the lower plate; The laminated tire also includes a tire shape trimming assembly, which includes two right-angle baffles, each of which includes a side fixing plate and a front and rear fixing plate that are detachably connected to each other at right angles; a hinge seat is provided at the end of the side fixing plate of the right-angle baffle, and a fixing seat is provided at the end of the front and rear fixing plates of the right-angle baffle, and the hinge seat is fixed to the fixing seat at the corresponding position through a hinge rod and a nut; and a clamping screw is provided on the front and rear fixing plates; The bottom tire is a square structure, two connecting plates are installed on two opposite sides, and two rectangular notches are set on the two sides where no connecting plates are installed; After the inner and outer circles of the expansion sleeve are processed, they are cut into three equal parts, each 3 to 4 mm smaller; The inner diameter of the expansion sleeve and the core shaft adopt a self-locking angle. When the core shaft and the expansion sleeve self-locking angle are fully matched, the outer diameter of the expansion sleeve is fully tightened, and the self-locking angle between the core shaft and the expansion sleeve is between 1 and 3 degrees.

2. The square stator punching laminated tire according to claim 1, characterized in that: The upper plate and the lower plate are both square plates, the upper plate is smaller than the lower plate, and four notches are respectively arranged on the four sides of the upper plate.

3. The square stator punching laminated tire according to claim 1, characterized in that: The width of the first-level step portion is smaller than the width of the lower pressing ring.

4. A method for laminating square stator sheets using the laminated tire according to claim 1, characterized in that: After the bottom tire is fixed, insert the expansion sleeve into the positioning groove of the bottom tire, install the lower pressing ring to the outer periphery of the first-level step portion, the first-level step portion and the lower pressing ring are in clearance, the sorted punching sheets are stacked outside the expansion sleeve, the upper tire is installed, the mandrel is pulled down and pressed, and the height is measured to see if it is qualified. After the height is measured to be qualified, the shape is further sorted, the mandrel is tightened, and the upper tire is pressurized. While pressurizing, several long bolts are inserted into the iron core through the upper tire, and the bolts are fixed. After the sheet is installed, the fixing plate is removed; The further adjustment of the appearance after the measured height is qualified refers to moving the two right-angle baffles relative to each other, observing whether the raised parts of the side surfaces of the front and rear fixing plates can be completely inserted into the side fixing plates. If not or not ideal, the appearance is adjusted again until it can be inserted smoothly. Then, the hinge rods on both sides are placed in their respective hinge seats, the nuts are tightened, and the entire appearance adjustment tire installation is completed.

5. The method for laminating square stator sheets according to claim 4, characterized in that: The fixing plates are removed by rotating the compression screws to push out the front and rear fixing plates.

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