A lamination positioning jig for a transformer core with a half-hole structure

Abstract

The application relates to the field of core lamination positioning tools, in particular to a lamination positioning clamp for a transformer core with a half-hole structure, which comprises a workbench, a support, a crossbeam and positioning pins for positioning the half-holes, the support is arranged on the workbench, the crossbeam is arranged on the support, two fasteners are horizontally and slidably connected to the crossbeam, the positioning pins are vertically and slidably connected to the fasteners, locking pieces for locking the positioning pins are connected to the fasteners, and adjusting pieces for adjusting the distance between the two fasteners are further connected to the crossbeam, so that the lamination efficiency of the core with the half-hole structure can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of core lamination positioning tool, in particular to a lamination positioning fixture for transformer core with semi-hole structure. BACKGROUND

[0002] In the production process of transformer core, the silicon steel sheets constituting the core need to be laminated. Currently, the process hole structure of the core is generally located in the middle position of the yoke and column of the core. Although this position is convenient for lamination and positioning pin can be directly penetrated for positioning, it also increases the loss of the core to some extent, especially for low capacity cores. Through the iron loss test experiment, it is found that the loss of the edge hole is reduced to some extent compared with the conventional hole under high magnetic density. Therefore, it is necessary to change the process hole structure of the core, open the process hole at the edge of the core, form a semi-hole, and achieve the purpose of reducing the loss.

[0003] However, at present, due to the lack of a positioning and lamination fixture special for semi-hole, workers need to constantly arrange the silicon steel sheets when laminating, resulting in low lamination efficiency.

[0004] The low lamination efficiency is difficult to meet the needs of factory batch production, therefore, for the field, it is necessary to develop a positioning fixture capable of improving the lamination efficiency of the core with semi-hole structure. SUMMARY

[0005] In order to improve the lamination efficiency of the core with semi-hole structure, the present application provides a lamination positioning fixture for transformer core with semi-hole structure.

[0006] The lamination positioning fixture for transformer core with semi-hole structure provided by the present application adopts the following technical scheme:

[0007] A lamination positioning fixture for transformer core with semi-hole structure, comprising a workbench, a support, a cross beam and a positioning pin for positioning the semi-hole, the support is arranged on the workbench, the cross beam is arranged on the support, two fasteners are horizontally slidably connected on the cross beam, the positioning pin is vertically slidably connected on the fastener, a locking piece for locking the positioning pin is connected on the fastener, and an adjusting piece for adjusting the distance between the two fasteners is further connected on the cross beam.

[0008] By adopting the above technical scheme, when laminating, the distance between the two fasteners is adjusted by the adjusting piece, so as to adjust the distance between the positioning pins, so that the positioning pins on the two fasteners can just constrain the silicon steel sheet in width, then the locking of the positioning pins by the locking piece away from the support is released, so that the positioning pins away from the support can slide in the vertical direction, the position height of the positioning pins away from the support is adjusted, the positioning pins away from the support are lifted to a height that does not affect lamination, then the positioning pins are locked by the locking piece, and then the lamination of the silicon steel sheet by one width is started. During the lamination process, the half-hole structure on the silicon steel sheet is clamped onto the positioning pins close to the support, and the positioning pins close to the support position the silicon steel sheet where the half-hole is located. After one width is completed, the position height of the positioning pins away from the support is adjusted again, so that the positioning pins away from the support move downward, and the positioning pins moving downward clamp the just laminated silicon steel sheet. The positioning pins on the two fasteners are used in cooperation to align the laminated silicon steel sheet. After alignment, the distance between the positioning pins on the two fasteners is adjusted according to the next width, then the position height of the positioning pins is adjusted according to the requirement, so that the position of the positioning pins close to the support can position the silicon steel sheet to be laminated, and the position height of the positioning pins away from the support does not affect lamination, and then the lamination process is started, so that the half-hole on the silicon steel sheet is clamped onto the positioning pins close to the support. After the lamination of the silicon steel sheet by this width is completed, the positioning pins away from the support move downward, the positioning pins on the two fasteners are used in cooperation to align the laminated silicon steel sheet, and the lamination steps of the silicon steel sheet by the subsequent width are repeated. During the whole lamination process, the worker uses the positioning clamp to laminate, which improves the lamination efficiency compared with constantly arranging the silicon steel sheet by hand.

[0009] Optionally, the adjusting piece comprises a first rack, a second rack, a gear and a rotating bolt, the first rack is connected to one fastener, the second rack is connected to the other fastener, the gear is connected to the rotating bolt, and the gear is located between the first rack and the second rack, one side of the gear is engaged with the first rack, and the other side of the gear is engaged with the second rack.

[0010] By adopting the above technical scheme, the rotating bolt is rotated, the rotating bolt drives the gear to rotate, and the gear drives the first rack and the second rack to move in opposite directions during rotation, so as to change the distance between the two fasteners, and the user can adjust according to the requirement.

[0011] Optionally, the cross beam is provided with a mounting groove and a sliding groove communicating with the mounting groove, the sliding groove is located on the opposite sides of the mounting groove, the fastener comprises two fastening blocks located in the mounting groove, the side of each fastening block away from the other fastening block is provided with a guide groove, the fastening block is slidably connected to the cross beam through the guide groove, the side of each fastening block close to the other fastening block is provided with a fastening arc-shaped groove, the positioning pin passes through the fastening arc-shaped groove, the locking piece is arranged on the two locking blocks, the first rack is connected to the fastening block on one fastener, and the second rack is connected to the fastening block on the other fastener.

[0012] By adopting the technical scheme, on one hand, the guide groove can guide the moving direction of the fasteners, improving the stability of the fasteners during the moving process; on the other hand, when the position of the positioning pin needs to be adjusted, the locking piece is adjusted, the positioning of the positioning pin by the locking piece is released, the positioning pin is moved, the position of the positioning pin is changed, the positioning pin is adjusted to the appropriate position, and then the positioning pin is fastened by the locking piece, so that the purpose of adjusting the position of the positioning pin is achieved.

[0013] Optionally, the locking piece comprises a locking bolt, the locking bolt is threadedly connected to the fastening block, and the end of the locking bolt abuts against the positioning pin; the first rack and the second rack are both provided with a connecting block, the connecting block is provided with a clamping arc-shaped groove, and the locking bolt is clamped in the clamping arc-shaped groove.

[0014] By adopting the technical scheme, the first rack and the second rack are driven to move by the clamping of the connecting block and the locking bolt during the moving process, so that the purpose of adjusting the distance between the fastening pieces is achieved.

[0015] Optionally, the positioning pin is connected with a positioning plate at one end of the positioning pin for positioning the half hole, the positioning plate is provided with a positioning arc-shaped groove, the positioning pin is connected in the positioning arc-shaped groove, and the part of the positioning pin protruding from the positioning plate is used for positioning the half hole.

[0016] By adopting the technical scheme, when the laminations are stacked, the positioning pin enters the half hole on the silicon steel sheet, and the positioning plate is used in cooperation with the positioning pin, so that the silicon steel sheet can be better positioned, the positioning effect is improved, and the accuracy and stability during the lamination process are improved.

[0017] Optionally, a channel steel is slidably connected to the workbench, and a support plate for placing the iron core is arranged on the channel steel.

[0018] By adopting the technical scheme, the user can adjust the position of the support plate according to the size of the iron core, and when adjusting, the channel steel is pulled to drive the support plate to move, so that the position of the support plate is changed to meet the different use requirements of the user.

[0019] Optionally, the workbench is provided with a track, a sleeve is slidably connected to the track, and a leveling piece for adjusting the level of the channel steel is arranged between the sleeve and the channel steel.

[0020] By adopting the technical scheme, the leveling piece can level the channel steel and the support plate on the channel steel, so that the inclination of the support plate and the channel steel is avoided, and the lamination process is affected.

[0021] Optionally, the cross beam and the support are slidably connected in the vertical direction, and a fixing piece for fixing the position of the cross beam is connected between the cross beam and the support.

[0022] By adopting the technical scheme, the user can adjust the position of the cross beam in the vertical direction according to the height of the laminations, and when adjusting, the positioning of the cross beam by the fixing member is first released, then the cross beam is moved, the cross beam is fastened by the fixing member after being moved to the appropriate position, and thus the adjustment of the position of the cross beam is completed.

[0023] Optionally, the cross beam is provided with a cross beam scale, and the support is provided with a scale scale.

[0024] By adopting the technical scheme, when adjusting the position height of the cross beam, the scale scale on the support can be referred to, and when adjusting the distance between the fasteners, the cross beam scale on the cross beam can be referred to, so as to improve the accuracy of the adjustment.

[0025] In summary, the present application includes at least one of the following beneficial technical effects:

[0026] 1. When laminating, the distance between the two fasteners is adjusted by the adjusting member, so that the distance between the positioning pins is adjusted, so that the positioning pins on the two fasteners can just constrain the silicon steel sheet in width, and then the locking of the positioning pins away from the support by the locking member is released, so that the positioning pins away from the support can slide in the vertical direction, the position height of the positioning pins away from the support is adjusted, the positioning pins away from the support are lifted to a height that does not affect the lamination, and then the positioning pins are locked by the locking member, and then the lamination of the silicon steel sheet is started. During the lamination process, the half-hole structure on the silicon steel sheet is clamped onto the positioning pin close to the support, and the positioning pin close to the support positions the silicon steel sheet where the half-hole is located. After one sheet width is completed, the position height of the positioning pin away from the support is adjusted again, so that the positioning pin away from the support moves downward, and the downward moving positioning pin clamps the just laminated silicon steel sheet. The positioning pins on the two fasteners are used in cooperation to align the laminated silicon steel sheet. After alignment, the distance between the positioning pins on the two fasteners is adjusted according to the next sheet width, and then the position height of the positioning pins is adjusted according to the requirement, so that the position of the positioning pin close to the support can position the silicon steel sheet to be laminated, and the height of the positioning pin away from the support does not affect the lamination. Then the lamination process is started, so that the half-hole on the silicon steel sheet is clamped onto the positioning pin close to the support. After the lamination of the silicon steel sheet in this sheet width is completed, the positioning pin away from the support moves downward, and the positioning pins on the two fasteners are used in cooperation to align the laminated silicon steel sheet. The lamination steps of the subsequent sheet width silicon steel sheet can be repeated as above. During the entire lamination process, the worker uses the positioning clamp to laminate, which improves the lamination efficiency compared with constantly arranging the silicon steel sheet by hand.

[0027] 2. Rotate the rotating bolt, the rotating bolt drives the gear to rotate, and the gear drives the first rack and the second rack to move in opposite directions during rotation, thereby changing the distance between the two fasteners. The user can adjust according to the requirement.

[0028] 3. In the lamination, the positioning pin is made to enter into the half hole on the silicon steel sheet, and the positioning plate is used in cooperation with the positioning pin, so that the silicon steel sheet can be better positioned, the positioning effect is improved, and the accuracy and stability in the lamination process are improved. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a structural schematic diagram of a lamination positioning clamp with a half hole structure of a transformer core in the embodiment of the application.

[0030] Figure 2 is a structural schematic diagram of a position relationship between the core and the support plate in the embodiment of the application.

[0031] Figure 3 is an enlarged view of A of Figure 1 .

[0032] Figure 4 is a structural schematic diagram of an adjusting member in the embodiment of the application.

[0033] Figure 5 is an enlarged view of B in Figure 4 .

[0034] Figure 6 is a structural schematic diagram of a position relationship between the channel steel and the leveling nut sleeve in the embodiment of the application.

[0035] BRIEF DESCRIPTION OF DRAWINGS

[0036] 1, workbench; 2, support; 3, crossbeam; 4, positioning pin; 5, half hole; 6, bottom plate; 7, rib plate; 8, scale ruler; 9, through hole; 10, fixing member; 11, fixed groove; 12, installation slot; 13, sliding slot; 14, crossbeam scale; 15, fastening block; 16, guide groove; 17, fastening arc-shaped groove; 18, locking member; 19, positioning plate; 20, positioning arc-shaped groove; 21, first rack; 22, second rack; 23, gear; 24, rotating bolt; 25, clamping arc-shaped groove; 26, connecting block; 27, channel steel; 28, track; 29, clamping sleeve; 30, leveling screw; 31, leveling nut sleeve; 32, support plate; 33, core; 34, scale line. DETAILED DESCRIPTION

[0037] The embodiment of the application discloses a lamination positioning clamp with a half hole structure of a transformer core.

[0038] Referring to Figure 1 and Figure 2 , it comprises a workbench 1, a support 2, a crossbeam 3 and a positioning pin 4. The positioning pin 4 is used for positioning the half hole 5 on the core 33.

[0039] Referring to Figure 1The workbench 1 is connected with a bottom plate 6, the support 2 is vertically connected to the bottom plate 6, and a rib plate 7 is connected between the support 2 and the bottom plate 6. The support 2 is provided with a scale 8, and the length direction of the scale 8 is the same as the length direction of the support 2.

[0040] With reference to Figure 1 and Figure 3 The cross beam 3 is slidably connected to the support 2 in the vertical direction. One end of the cross beam 3 is provided with a through hole 9. The cross beam 3 is slidably sleeved on the support 2 through the through hole 9. A fixing member 10 is connected between the cross beam 3 and the support 2. The fixing member 10 is used for fixing the position of the cross beam 3. The fixing member 10 is a fixing bolt. The support 2 is provided with a fixing groove 11 along the length direction. The fixing bolt is threadedly connected to the cross beam 3. The fixing bolt extends into the fixing groove 11 and tightly abuts against the bottom of the fixing groove 11.

[0041] When it is necessary to adjust the position of the cross beam 3 in the vertical direction, the fixing bolt is screwed. The fixing bolt no longer tightly abuts against the bottom of the fixing groove 11. The positioning of the cross beam 3 is released. The cross beam 3 is moved up and down. The position of the cross beam 3 in the vertical direction is changed. During the movement of the cross beam 3, the scale 8 on the support 2 can be referred to. After the cross beam 3 is moved to the appropriate position according to the requirement, the fixing bolt is tightened again. The fixing bolt tightly abuts against the bottom of the fixing groove 11 again. Thus, the position of the cross beam 3 is fixed. The change of the position of the cross beam 3 is avoided. The purpose of positioning the cross beam 3 is achieved.

[0042] With reference to Figure 3 and Figure 4 The cross beam 3 is provided with an installation through slot 12 and a sliding slot 13 communicating with the installation slot. The sliding slot 13 is located on the opposite sides of the installation through slot 12. The length direction of the installation through slot 12 and the length direction of the sliding slot 13 are the same as the length direction of the cross beam 3.

[0043] With reference to Figure 3 and Figure 4 The cross beam 3 is provided with a cross beam scale 14 along the length direction. Two fastening members are slidably connected to the cross beam 3 in the horizontal direction. The fastening member comprises two fastening blocks 15 located in the installation through slot 12. The side, which is away from each other, of the two fastening blocks 15 is provided with a guide slot 16. The fastening block 15 is slidably connected to the cross beam 3 through the guide slot 16. The side, which is close to each other, of the two fastening blocks 15 is provided with a fastening arc-shaped slot 17. The positioning pin 4 is vertically slidably connected to the fastening member. Specifically, the positioning pin 4 penetrates through the fastening arc-shaped slot 17. The fastening member is connected with a locking member 18 for locking the positioning pin 4. The locking member 18 is arranged on the two fastening blocks 15. The locking member 18 comprises a locking bolt. The fastening block 15 is provided with a locking thread hole communicating with the guide slot 16 and the fastening arc-shaped slot 17. The locking bolt is threadedly connected to the locking thread hole. The end of the locking bolt abuts against the side wall of the positioning pin 4. At this time, the positioning pin 4 abuts against the side wall of the fastening arc-shaped slot 17.

[0044] When the relative position between the positioning pin 4 and the fastener needs to be adjusted, the locking bolt is screwed so that the locking bolt no longer abuts against the positioning pin 4, the positioning of the positioning pin 4 is released, the positioning pin 4 is moved, the positioning pin 4 moves in the fastening arc-shaped groove 17, after the positioning pin 4 is moved to the appropriate position, the locking bolt is tightened again so that the locking bolt abuts against the positioning pin 4 again, the two fastening blocks 15 cooperate with the locking bolt to fix the positioning pin 4 again, and the adjustment of the position of the positioning pin 4 is completed.

[0045] Referring to Figure 2 and Figure 4 , the positioning pin 4 is connected with a positioning plate 19 at one end of the positioning plate 5, the positioning plate 19 is provided with a positioning arc-shaped groove 20, the positioning pin 4 is connected in the positioning arc-shaped groove 20, and the part of the positioning pin 4 protruding from the positioning plate 19 is used for positioning the half hole 5. The positioning plate 19 cooperates with the positioning pin 4 to be used for better positioning when the laminations are stacked.

[0046] During the adjustment of the positioning pin 4, the user can also adjust the orientation of the positioning plate 19 according to the needs. When the orientation of the positioning plate 19 needs to be changed, the positioning plate 19 is turned after the positioning of the positioning pin 4 is released, so that the orientation of the positioning plate 19 is changed. After the orientation of the positioning plate 19 is adjusted, the positioning pin 4 is fixed again.

[0047] Referring to Figure 4 and Figure 5 , three scale lines 34 are arranged on the side wall of the fastening block 15 corresponding to one side of the beam scale 14. The middle scale line 34 corresponds to the center line of the positioning pin 4. The scale line 34 close to the positioning plate 19 corresponds to the side wall on the side of the positioning plate 19 away from the positioning arc-shaped groove 20. The scale line 34 away from the positioning plate 19 corresponds to the side edge of the positioning pin 4 away from the positioning plate 19.

[0048] Referring to Figure 4 and Figure 5 , the beam 3 is further connected with an adjusting piece for adjusting the distance between the two fasteners. The adjusting piece comprises a first rack 21, a second rack 22, a gear 23 and a rotating bolt 24. The first rack 21, the second rack 22 and the gear 23 are located in the sliding groove 13. The first rack 21 is connected with one fastening block 15 on one fastener, and the second rack 22 is connected with one fastening block 15 on the other fastener. The first rack 21 and the second rack 22 are both connected with a connecting block 26, the connecting block 26 is provided with a clamping arc-shaped groove 25, the locking bolt is clamped in the clamping arc-shaped groove 25, the first rack 21 and the second rack 22 abut against the side wall of the sliding groove 13, the first rack 21 and the second rack 22 are oppositely arranged, the gear 23 is connected with the rotating bolt 24, and the gear 23 is located between the first rack 21 and the second rack 22. One side of the gear 23 is engaged with the first rack 21, and the other side is engaged with the second rack 22.

[0049] When adjusting the distance between the two fasteners, the rotating screw 24 is rotated, the rotating screw 24 drives the gear 23 to rotate, the gear 23 drives the first rack 21 and the second rack 22 to move towards opposite directions in the process of rotating, so as to change the distance between the fastener on the first rack 21 and the fastener on the second rack 22, and in the process of adjusting, the cross beam scale 14 can be referred to, and the purpose of adjusting the distance between the two fasteners is achieved.

[0050] With reference to Figure 1 , Figure 2 and Figure 6 , the workbench 1 is slidably connected with the channel steel 27, specifically, the workbench 1 is connected with two parallel rails 28, the rails 28 are slidably connected with the sleeve 29, the sleeve 29 is provided with the leveling member for adjusting the level of the channel steel between the sleeve 29 and the channel steel 27, the leveling member comprises the leveling screw 30 and the leveling nut sleeve 31, the leveling screw 30 is connected with the sleeve 29, the leveling nut sleeve 31 is threadedly connected with the leveling screw 30, the channel steel 27 is downwardly opened, the leveling nut sleeve 31 is inserted into the channel steel 27, and the support plate 32 for placing the iron core 33 is arranged on the channel steel 27.

[0051] The relative position between the channel steel 27 and the workbench 1 is changed by pulling the channel steel, so that the position of the support plate 32 is adjusted, the position of the support plate 32 can also be changed by directly moving the support plate 32, and the user can adjust according to the demand. Before the lamination operation, the position height of the channel steel 27 can be finely adjusted by rotating the leveling nut sleeve 31, so as to level the channel steel 27.

[0052] The implementation principle of the lamination positioning clamp of the transformer core with the half-hole structure in the embodiment of the application is as follows: during lamination, the leveling nut sleeve 31 is rotated to level the channel steel 27, the support plate 32 is placed on the channel steel 27, and then the position of the support plate 32 is adjusted so that the support plate 32 is located at a proper position. Then, the position height of the cross beam 3 is adjusted, the cross beam 3 is adjusted to a proper height, the rotating bolt 24 is rotated to adjust the distance between the two fasteners, and during the adjustment process, the cross beam scale 14 can be used as a reference so that the positioning pins 4 on the two fasteners can just constrain the silicon steel sheet in width (usually, only one side of the silicon steel sheet has the half-hole 5, therefore, during lamination, the positioning pin 4 close to the support 2 is used to position the half-hole 5, that is, the part of the positioning pin 4 close to the support 2 protruding from the positioning plate 19 faces the half-hole 5 of the silicon steel sheet, and the positioning pin 4 away from the support 2 is used to position the side of the silicon steel sheet without the half-hole 5, so that the positioning plate 19 on the positioning pin 4 away from the support 2 faces the support 2), and then the locking bolt away from the support 2 is screwed to release the locking of the positioning pin 4 away from the support 2, so that the positioning pin 4 can slide in the vertical direction, the positioning pin 4 away from the support 2 is lifted to a height that does not affect lamination, and then the positioning pin 4 is locked by the locking bolt. Then, the lamination of one sheet width of the silicon steel sheet is started, the silicon steel sheet is placed on the support plate 32, during the lamination process, the half-hole 5 structure on the silicon steel sheet is clamped to the positioning pin 4 close to the support 2, and the positioning pin 4 close to the support 2 and the positioning plate 19 on the positioning pin 4 position the silicon steel sheet with the half-hole 5. After the lamination of one sheet width of the silicon steel sheet is completed, the position height of the positioning pin 4 away from the support 2 is adjusted again, so that the positioning pin 4 away from the support 2 and the positioning plate 19 on the positioning pin 4 move downward, and the clamped silicon steel sheet is clamped by the downward moving positioning pin 4 and the positioning plate 19, and the positioning pin 4 is used in cooperation with the positioning plate 19 to align the laminated silicon steel sheet.

[0053] After alignment, the distance between the two positioning pins 4 is adjusted according to the next sheet width of the silicon steel sheet, and then the position height of the positioning pin 4 is adjusted according to the requirement, so that the position of the positioning pin 4 close to the support 2 can position the silicon steel sheet to be laminated, and the height of the positioning pin 4 away from the support 2 does not affect lamination. Then, the lamination process is started, the half-hole 5 on the silicon steel sheet is clamped to the positioning pin 4 close to the support 2, after the lamination of one sheet width of the silicon steel sheet is completed, the positioning pin 4 away from the support 2 moves downward, the positioning pin 4 is used in cooperation with the positioning plate 19 to align the laminated silicon steel sheet, and the lamination steps of the subsequent sheet width of the silicon steel sheet are repeated. During the whole lamination process, the worker uses the positioning clamp to laminate, which improves the lamination efficiency compared with the manual arrangement of the silicon steel sheet, and has certain practical significance for the popularization and use of the half-hole structure lamination.

Claims

1. A lamination positioning jig for a transformer core with a half-hole structure, characterized by: The utility model provides a positioning device for half hole, including workbench (1), support (2), crossbeam (3) and be used for positioning half hole (5) positioning pin (4), support (2) sets up on workbench (1), crossbeam (3) sets up on support (2), two fastenings are connected with the horizontal sliding of crossbeam (3), positioning pin (4) vertically slidingly connected on fastening, fastening is connected with the locking piece (18) for locking positioning pin (4) on, crossbeam (3) still be connected with the adjusting piece for adjusting the distance between two fastenings, the adjusting piece includes first rack (21), second rack (22), gear (23) and rotation bolt (24), first rack (21) is connected one fastening, second rack (22) connects another fastening, gear (23) is connected on rotation bolt (24), and gear (23) is located between first rack (21) and second rack (22), one side of gear (23) is engaged with first rack (21), and the other side is engaged with second rack (22), the crossbeam (3) is equipped with installation through slot (12) and the sliding slot (13) of intercommunication installation slot, sliding slot (13) is located on the opposite side of installation through slot (12), the fastening includes two fastening blocks (15) in installation through slot (12), the side of two fastening blocks (15) away from each other is equipped with guide slot (16), and fastening block (15) is slidably connected on crossbeam (3) through guide slot (16), the side of two fastening blocks (15) close to each other is equipped with fastening arc slot (17), positioning pin (4) passes through fastening arc slot (17), locking piece (18) is arranged on two locking blocks, first rack (21) is connected the fastening block (15) on one fastening, second rack (22) connects the fastening block (15) on another fastening, the locking piece (18) includes locking bolt, locking bolt is threadedly connected on fastening block (15), and the end of locking bolt is tightly resisted positioning pin (4), first rack (21) and second rack (22) are equipped with connecting block (26), and connecting block (26) is equipped with clamping arc slot (25), and locking bolt is clamped in clamping arc slot (25).

2. A lamination positioning jig for a transformer core with a half-hole structure according to claim 1, characterized in that: The positioning pin (4) is used for positioning half hole (5) one end and is connected with positioning plate (19), the positioning plate (19) is equipped with positioning arc slot (20), and the positioning pin (4) is connected in positioning arc slot (20), and the part of positioning pin (4) protruding from positioning plate (19) is used for positioning half hole (5).

3. A lamination fixture for a transformer core with half-hole structure according to claim 1, characterized in that: The workbench (1) is slidably connected with channel steel (27), and the support plate (32) for placing the iron core (33) is arranged on the channel steel (27).

4. A lamination fixture for a transformer core with a half-hole structure according to claim 3, characterized in that: The workbench (1) is provided with a track (28), and a sleeve (29) is slidably connected to the track (28), and a leveling device is arranged between the sleeve (29) and the channel steel (27) to adjust the level of the channel steel.

5. A lamination fixture for a transformer core with a half-hole structure according to claim 1, characterized in that: The crossbeam (3) and the support (2) are vertically slidably connected, and a fixing device (10) is arranged between the crossbeam (3) and the support (2) to fix the position of the crossbeam (3).

6. A lamination fixture for a transformer core with half-hole structure according to claim 1, characterized in that: The crossbeam (3) is provided with a crossbeam scale (14), and the support (2) is provided with a scale (8).

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