CN220210207U - Special-shaped coil end forming tool - Google Patents
Special-shaped coil end forming tool Download PDFInfo
- Publication number
- CN220210207U CN220210207U CN202322224085.9U CN202322224085U CN220210207U CN 220210207 U CN220210207 U CN 220210207U CN 202322224085 U CN202322224085 U CN 202322224085U CN 220210207 U CN220210207 U CN 220210207U
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- fixing plate
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- shaped coil
- positioning screw
- plate
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- 238000005452 bending Methods 0.000 claims abstract description 25
- 238000003825 pressing Methods 0.000 claims abstract description 23
- 230000006835 compression Effects 0.000 claims abstract description 15
- 238000007906 compression Methods 0.000 claims abstract description 15
- 125000006850 spacer group Chemical group 0.000 claims 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 abstract description 16
- 229910052802 copper Inorganic materials 0.000 abstract description 16
- 239000010949 copper Substances 0.000 abstract description 16
- 238000000034 method Methods 0.000 abstract description 7
- 230000008569 process Effects 0.000 abstract description 7
- 238000001125 extrusion Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000465 moulding Methods 0.000 description 6
- 238000003466 welding Methods 0.000 description 4
- 238000007493 shaping process Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 208000029154 Narrow face Diseases 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Manufacture Of Motors, Generators (AREA)
Abstract
The utility model discloses a special-shaped coil end forming tool which comprises a bending die bottom plate, a compression block, a roller spanner, a positioning screw and a pressing plate, wherein the bending die bottom plate is provided with a plurality of clamping blocks; the bending die bottom plate comprises a left fixing plate, a positioning rod and a right fixing plate, wherein the left fixing plate is connected with the positioning rod, and the positioning rod is connected with the right fixing plate; the left fixing plate and the right fixing plate are respectively connected with the compression block by a fixing Kong Erfen; the left fixing plate is in threaded connection with the positioning screw rod, and the positioning screw rod penetrates through the reserved through hole on the pressing plate; the roller spanner comprises a spanner head, an upper arm, a lower arm, rollers, a shaft, a cushion block and a baffle plate, wherein the rollers are rotationally connected on the shaft, two ends of the shaft are respectively connected with the upper arm and the lower arm, the upper arm and the lower arm are respectively rotationally connected with two ends of a positioning screw rod, and the cushion block is positioned between the rollers and the special-shaped coil. The forming tool can realize the forming of the end part of the special-shaped coil, can prevent the phenomenon of overlarge flanging of the special-shaped coil (copper bar) during forming, and can basically eliminate the extrusion deformation of the coil copper bar during the forming process.
Description
Technical Field
The utility model relates to the field of special rotor coil forming, in particular to a special coil (special rotor coil) end forming tool which is used for forming special rotor coils with end shapes different from those of conventional rotor coils.
Background
The rotor coils (hereinafter referred to as rotor coils) of the existing doubly-fed asynchronous wind power generator are all of conventional shapes, and are distinguished only by upper and lower layers of rotor coils, namely, all upper layers of rotor coils are coils with the same shape, and all lower layers of rotor coils are also identical in shape. The design structure reduces the production difficulty of the rotor coil, and is suitable for mass production of the rotor coil under lower technical conditions. For the driving end, the cross-slot butt joint position of the rotor coil is fixed, so that the shape of the end can be molded in place at one time. In the case of the terminal, the secondary molding is required in the wiring process because of the need to leave the position of the lead-out wire of the rotor coil and the need for the series connection of the branches. When the branches are connected in series, the two ends of one group of rotor coils need to be connected by using a separately formed bridging copper bar, and two extra welding points exist when each group of rotor coils are connected in series.
With the increasing requirements of industry on product quality and product cost control, most of rotor coils designed at present are in conventional shapes, the shapes of the rotor coils are further subdivided according to the wiring design requirements of the rotor coils, and when the shapes of the driving ends and the wiring ends of the rotor coils after subdivision are molded, molding equipment can be adopted for one-step molding, so that the requirements of rotor coil fine production are met, the requirements of the fine design on coil production are also increased, the copper consumption is reduced, the material cost is saved, and secondary molding during wiring is also avoided. The shape of the terminal of a small number of rotor coils is complex (the small number of coils are called special-shaped coils for short below), and the design of the special-shaped coils has the advantages that two special-shaped coils are lap welded at the tail end in a group of two terminal, so that the number of previous welding positions can be reduced from two to one, and the welding risk is reduced. However, since the shaped coil cannot be formed into a desired shape by one-time molding by a molding apparatus, special treatment is required, one of the reasons is as follows: the cross-sectional dimension of the copper bar is generally a rectangle with four rounded corners, the cross section of the copper bar is shown in figure 1, and assuming that the length of the rectangle is a, the width of the rectangle is b, and the unit is mm, the length of the rectangle is generally 20-30, and the length of the rectangle is 2-10. Because the bending axis is vertical to the length direction of the section in the vertical bending forming process of the copper bar, the bending operation in the direction is that the numerical value of a is larger, and the difference value of the inner arc R and the outer arc R after the copper bar is bent is a, the inner arc of the copper bar can be extruded in the forming process, the outer arc can be stretched, the numerical value of b is smaller, flanging is extremely easy to cause in the forming process, and the larger the numerical value of a/b is, the more difficult the copper bar is in forming.
Therefore, the special-shaped coil end forming tool is required to be invented, and the problems that the special-shaped coil is difficult to form, the flanging of the copper bar is overlarge during vertical bending forming and the like are solved.
Disclosure of Invention
The utility model aims to solve the technical problem of providing a special-shaped coil end forming tool which aims at overcoming the defects of the prior art, and the special-shaped coil end forming tool can realize special-shaped coil end forming, is simple in forming process and can prevent the phenomenon of overlarge flanging of a copper bar during vertical bending forming.
In order to achieve the technical purpose, the utility model adopts the following technical scheme:
a special-shaped coil end forming tool comprises a curved die bottom plate, a compression block, a roller wrench, a positioning screw and a pressing plate;
the bending die bottom plate comprises a left fixing plate, a positioning rod and a right fixing plate, wherein the left fixing plate is L-shaped, one end of the left fixing plate is arc-shaped, the left fixing plate is fixedly connected with the left end of the positioning rod, and the right fixing plate is fixedly connected with the middle right part of the positioning rod; the left fixing plate and the right fixing plate are respectively provided with a first fixing hole and a second fixing hole; the first fixing holes on the left fixing plate and the right fixing plate are used for being connected with the operation table top, and the fixing Kong Erfen on the left fixing plate and the right fixing plate are respectively connected with the compression block; a threaded hole is formed in the semicircular center of one end, close to the semicircle, of the left fixing plate, the threaded hole is in threaded connection with a positioning screw, the positioning screw penetrates through a reserved through hole in the pressing plate, and a gap between the pressing plate and the left fixing plate is used for accommodating a special-shaped coil;
the roller spanner comprises a spanner head, an upper arm, a lower arm, rollers, a shaft, a cushion block and a baffle, wherein the spanner head is fixedly connected with the upper arm, the rollers are rotationally connected on the shaft, two ends of the shaft are respectively connected with the upper arm and the lower arm, the upper arm and the lower arm are respectively rotationally connected with two ends of a positioning screw rod, the lower arm is connected with the baffle, and the cushion block is positioned between the rollers and the special-shaped coil and is also positioned between the baffle and the special-shaped coil.
As a further improved technical scheme of the utility model, the lower arm is T-shaped, and one end of the lower arm, which is close to the end of the lower arm and is connected with the positioning screw rod, is arc-shaped.
As a further improved technical scheme of the utility model, the cushion block is fixedly connected to the upper surface of the lower arm through a screw.
As a further improved technical scheme of the utility model, one end of the upper arm, which is close to the end connected with the positioning screw rod, is arc-shaped.
As a further improved technical scheme of the utility model, the pressing plate is round, and a notch for avoiding the pressing block is formed in the pressing plate.
As a further improved technical scheme of the utility model, the compressing block is in a strip shape, the surfaces of two end parts of the compressing block are provided with through holes for connecting with the left fixing plate or the right fixing plate, one end of the compressing block is arc-shaped, and the through holes on the surface of the other end part penetrate through one long side of the compressing block.
As a further improved technical scheme of the utility model, the compression block is fixedly connected with the left fixing plate or the right fixing plate through screws.
As a further improved technical scheme of the utility model, nuts are connected with both ends of the positioning screw rod in a threaded manner, and nuts are connected with both ends of the shaft in a threaded manner.
The beneficial effects of the utility model are as follows:
because of the structural design, a small amount of assembly gaps are reserved among the roller, the cushion block and the special-shaped coil, and the gaps are 2-3mm. When the special-shaped coil is formed, the roller spanner is rotated by force, and when the roller spanner rotates around the positioning screw, after the center of the positioning screw is deviated from the perpendicular line of the special-shaped coil a little, the roller applies eccentric pressure to the cushion block relative to the center of the positioning screw, and the eccentric pressure is applied to the special-shaped coil through the conduction of the cushion block, so that the special-shaped coil is deformed and bent along the cylinder in the middle of the positioning screw. In the operation process, the roller spanner, the cushion block and the pressing plate are effectively restrained through the special-shaped coil of the vertical bending R part, the flanging of the special-shaped coil can be prevented from being oversized when the vertical bending R forming is completed (namely, the roller spanner is stopped to rotate when the length direction of the upper arm is parallel to the length square of the positioning rod, the flanging of the special-shaped coil can be prevented from being oversized), and the trapezoid degree of the special-shaped coil is enabled to meet the requirement after the slight flanging is subjected to subsequent flattening operation, so that the cross section area is in a reasonable range compared with that of the straight copper bar, and the production of the special-shaped coil is met.
Drawings
Fig. 1 is a schematic cross-sectional view of a prior art profiled coil.
Fig. 2 is a schematic structural diagram of the forming tool of the present utility model.
FIG. 3 is a schematic view of the bottom plate of the bending die of the present utility model.
Fig. 4 is a schematic structural view of a roller wrench according to the present utility model.
Fig. 5 is a top view of a structure of the utility model with a shaped coil placed on a bottom plate of a bending die before bending.
Fig. 6 is a top view of the structure of the shaped coil of the present utility model placed on a forming tool prior to bending.
Fig. 7 is a top view of the shaped coil of the present utility model after being bent and placed on a forming tool.
Fig. 8 is a front view of the structure of the shaped coil of the present utility model after being bent and placed on a forming tool.
Fig. 9 is a top view of the structure of the utility model after bending the shaped coil and placing it on the bottom plate of the bending die.
Detailed Description
The following is a further description of embodiments of the utility model, with reference to the accompanying drawings:
a special-shaped coil end forming tool, as shown in figure 2, comprises a bending die bottom plate, a compression block 4, a roller spanner, a positioning screw 18 and a pressing plate 5;
as shown in fig. 3 and 5, the bottom plate of the bending die comprises a left fixing plate 2, a positioning rod 1 and two right fixing plates 3, wherein the left fixing plate 2 is in an L shape, one end of the left fixing plate 2 is in a circular arc shape, the left fixing plate 2 is fixedly connected with the left end of the positioning rod 1, and the middle right part of the positioning rod 1 is fixedly connected with the two symmetrically arranged right fixing plates 3; the left fixing plate 2 and the right fixing plate 3 are respectively provided with a first fixing hole and a second fixing hole 13; the first fixing holes on the left fixing plate 2 and the right fixing plate 3 are both used for being connected with the operation table top through screws 11, and the second fixing holes 13 on the left fixing plate 2 and the right fixing plate 3 are respectively connected with the compression block 4 through screws 11; the semicircular center of the left fixed plate 2, which is close to one end of the semicircle, is provided with a threaded hole 12, the threaded hole 12 is in threaded connection with a positioning screw 18, the positioning screw 18 penetrates through a reserved through hole on the pressing plate 5, and a gap between the pressing plate 5 and the left fixed plate 2 is used for placing a special-shaped coil 16.
As shown in fig. 4, the roller wrench comprises a wrench head 6, an upper arm 7, a lower arm 8, rollers 14, a shaft, a cushion block 9 and a baffle 10, wherein the wrench head 6 and the upper arm 7 are fixedly connected in a welding mode, the shaft is rotationally connected with the rollers 14 through bearings, two ends of the shaft are respectively connected with the upper arm 7 and the lower arm 8, the upper arm 7 and the lower arm 8 are respectively rotationally connected with two ends of a positioning screw 18, the baffle 10 is connected on the lower arm 8, and the cushion block 9 is positioned between the rollers 14 and the special-shaped coil 16 and also positioned between the baffle 10 and the special-shaped coil 16.
In this embodiment, the lower arm 8 is T-shaped, and an end of the lower arm 8 near the end connected to the positioning screw 18 is arc-shaped.
In this embodiment, the pad 9 is fixedly connected to the upper surface of the lower arm 8 by a screw 11.
In this embodiment, the end of the upper arm 7 near the end connected to the positioning screw 18 is arc-shaped.
In this embodiment, the pressing plate 5 is circular, and a notch 17 (as shown in fig. 6) for avoiding the pressing block 4 is formed in the pressing plate 5.
In this embodiment, the compressing block 4 is in a strip shape, the surfaces of two end parts of the compressing block 4 are all provided with through holes for connecting with the left fixing plate 2 or the right fixing plate 3, one end of the compressing block 4 is in a circular arc shape, and the through holes on the surface of the other end part penetrate through one long side of the compressing block 4.
In this embodiment, the compression block 4 is fixedly connected with the left fixing plate 2 or the right fixing plate 3 through a screw 11.
In this embodiment, nuts 15 are screwed to both ends of the positioning screw 18, and nuts 15 are screwed to both ends of the shaft.
In this embodiment, the shaped coil 16 may be formed along a narrow-face arc axis (hereinafter referred to as "standing bend R"), and the bending forming at the position where the bending axis is perpendicular to the length direction is mainly solved. The first fixing holes on the left fixing plate 2 and the right fixing plate 3 of the bending die bottom plate and the operation table top are fixed through screws 11, wherein threaded holes 12 on the left fixing plate 2 are suspended, a special-shaped coil 16 with a formed driving end (right end) is horizontally placed on a positioning rod 1, a corner R of the formed right end coincides with the right end R of the positioning rod 1, two compacting blocks 4 are assembled on the straight line of the special-shaped coil 16, the straight line part of the special-shaped coil 16 is clamped with the positioning rod 1, the special-shaped coil 16 is prevented from shifting during forming, namely, the compacting blocks 4 are fixedly connected with second fixing holes 13 on the left fixing plate 2 and the right fixing plate 3 through screws 11, and then the special-shaped coil 16 is compacted; the special-shaped coil 16 is assembled, a roller spanner, a positioning screw 18 and the like are needed for vertical bending, the positioning screw 18 is connected with a threaded hole 12 on the left fixed plate 2 in a threaded manner, the positioning screw 18 penetrates through a through hole of the pressing plate 5, the pressing plate 5 is arranged on the special-shaped coil 16, an upper arm 7 and a lower arm 8 of the roller spanner are respectively sleeved at two ends of the positioning screw 18, nuts 15 are screwed at two ends of the positioning screw 18, and at the moment, the upper arm 7, the lower arm 8 and the positioning screw 18 of the roller spanner can rotate through external force; the roller 14 can rotate, and the cushion block 9 is inserted between the roller 14 and the special-shaped coil 16 and between the baffle 10 and the special-shaped coil 16. An extension rod is taken and connected with the spanner head 6 (sleeved), an operator holds the tail end of the extension rod (not shown in the figure) to rotate by 90 degrees clockwise with force (see fig. 6-8), the roller 14 applies eccentric pressure to the cushion block 9, the cushion block 9 applies eccentric pressure to the special-shaped coil 16, and the special-shaped coil 16 is deformed and bent along a cylinder in the middle of the positioning screw 18 (see fig. 9), so that the wiring end forming is realized.
In this embodiment, the pad 9 and the profiled coil 16 are in surface contact, when the roller wrench rotates around the positioning screw 18, the profiled coil 16 will deform, at this time, a strong pressure is generated between the pad 9 and the profiled coil 16, a friction force generated by the pressure is also great, the friction force can make the pad 9 unable to slide relative to the profiled coil 16, meanwhile, the pad 9 rotates along with the rotation of the roller wrench, the pad 9 is subjected to stress analysis, the pad 9 is balanced in the vertical direction by the vertical downward gravity and the supporting force of the lower arm 8 of the roller wrench, the pad 9 is subjected to stress balance in the horizontal direction by the pressure of the profiled coil 16 to the pad 9 and the pressure of the roller 14 to the pad 9, and a static friction force generated by the pressure of the profiled coil 16 and the friction force of the roller 14 to the pad 9 in the other horizontal direction are received, the roller 14 can roll, and the static friction force between the pad 16 and the pad 9 is minimal.
The shaping frock of this embodiment carries out effective restraint through the special-shaped coil 16 (i.e. the copper bar) of the R part of counter bend, can prevent when accomplishing the R shaping of counter bend that the copper bar from flanging is too big, slightly turn up after the operation of subsequent clapping, makes the trapezoidal degree of this place accord with the requirement, and cross-sectional area compares in reasonable within range with straight copper bar, satisfies the production of special-shaped coil 16.
The scope of the present utility model includes, but is not limited to, the above embodiments, and any alterations, modifications, and improvements made by those skilled in the art are intended to fall within the scope of the utility model.
Claims (8)
1. The special-shaped coil end forming tool is characterized by comprising a bending die bottom plate, a compression block, a roller spanner, a positioning screw and a pressing plate;
the bending die bottom plate comprises a left fixing plate, a positioning rod and a right fixing plate, wherein the left fixing plate is L-shaped, one end of the left fixing plate is arc-shaped, the left fixing plate is fixedly connected with the left end of the positioning rod, and the right fixing plate is fixedly connected with the middle right part of the positioning rod; the left fixing plate and the right fixing plate are respectively provided with a first fixing hole and a second fixing hole; the first fixing holes on the left fixing plate and the right fixing plate are used for being connected with the operation table top, and the fixing Kong Erfen on the left fixing plate and the right fixing plate are respectively connected with the compression block; a threaded hole is formed in the center of a semicircle, close to one end of the semicircle, of the left fixing plate, the threaded hole is in threaded connection with a positioning screw, the positioning screw penetrates through a reserved through hole in the pressing plate, and a gap between the pressing plate and the left fixing plate is used for placing a special-shaped coil;
the roller spanner comprises a spanner head, an upper arm, a lower arm, rollers, a shaft, a cushion block and a baffle, wherein the spanner head is fixedly connected with the upper arm, the rollers are rotationally connected on the shaft, two ends of the shaft are respectively connected with the upper arm and the lower arm, the upper arm and the lower arm are respectively rotationally connected with two ends of a positioning screw rod, the lower arm is connected with the baffle, and the cushion block is positioned between the rollers and the special-shaped coil and is also positioned between the baffle and the special-shaped coil.
2. The special-shaped coil end forming tool according to claim 1, wherein the lower arm is of a T shape, and one end of the lower arm, which is close to the end connected with the positioning screw rod, is of a circular arc shape.
3. The profiled coil end forming tooling of claim 2 wherein the spacer is fixedly attached to the upper surface of the lower arm by screws.
4. The shaped coil end forming tool according to claim 1, wherein the end of the upper arm, which is close to the end connected with the positioning screw, is arc-shaped.
5. The special-shaped coil end forming tool according to claim 1, wherein the pressing plate is round, and a notch for avoiding the pressing block is formed in the pressing plate.
6. The special-shaped coil end forming tool according to claim 1, wherein the compression block is of a strip shape, through holes for connecting with a left fixing plate or a right fixing plate are formed in the surfaces of two end parts of the compression block, one end of the compression block is of a circular arc shape, and the through holes in the surface of the other end part penetrate through one long side of the compression block.
7. The profiled coil end forming tooling of claim 6 wherein the compression block is fixedly connected to the left or right fixing plate by screws.
8. The profiled coil end forming tooling of claim 1 wherein nuts are threaded at both ends of the positioning screw and nuts are threaded at both ends of the shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322224085.9U CN220210207U (en) | 2023-08-18 | 2023-08-18 | Special-shaped coil end forming tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322224085.9U CN220210207U (en) | 2023-08-18 | 2023-08-18 | Special-shaped coil end forming tool |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220210207U true CN220210207U (en) | 2023-12-19 |
Family
ID=89139835
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322224085.9U Active CN220210207U (en) | 2023-08-18 | 2023-08-18 | Special-shaped coil end forming tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220210207U (en) |
-
2023
- 2023-08-18 CN CN202322224085.9U patent/CN220210207U/en active Active
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