CN111054820A - Stamping process and stamping equipment for preventing blanking knife edge of straight-bar stator from cracking - Google Patents

Stamping process and stamping equipment for preventing blanking knife edge of straight-bar stator from cracking Download PDF

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Publication number
CN111054820A
CN111054820A CN201911178280.4A CN201911178280A CN111054820A CN 111054820 A CN111054820 A CN 111054820A CN 201911178280 A CN201911178280 A CN 201911178280A CN 111054820 A CN111054820 A CN 111054820A
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China
Prior art keywords
punching
stamping
stator
oil
knife edge
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Application number
CN201911178280.4A
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Chinese (zh)
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CN111054820B (en
Inventor
赵在斌
白岩华
罗运辉
谭友春
陈生凤
陈东锁
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Gree Electric Appliances Inc of Zhuhai
Zhuhai Kaibang Motor Manufacture Co Ltd
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Gree Electric Appliances Inc of Zhuhai
Zhuhai Kaibang Motor Manufacture Co Ltd
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Priority to CN201911178280.4A priority Critical patent/CN111054820B/en
Publication of CN111054820A publication Critical patent/CN111054820A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D35/00Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/002Processes combined with methods covered by groups B21D1/00 - B21D31/00
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/18Lubricating, e.g. lubricating tool and workpiece simultaneously
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K15/00Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/02Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Power Engineering (AREA)
  • Manufacture Of Motors, Generators (AREA)

Abstract

The invention provides a stamping process and stamping equipment for avoiding cracking of a blanking knife edge of a straight bar stator, relates to the technical field of stamping equipment, and solves the technical problem that the blanking knife edge is easy to break when the straight bar stator is stamped in the prior art. In the stamping process for avoiding the cracking of the blanking knife edge of the straight stator, the stamping of two wings of the stator tooth comprises a pre-stamping step and a forming stamping step, the pre-stamping step needs to stamp buffer holes corresponding to the two wings of the stator tooth, and the forming stamping step is used for stamping the complete stator tooth.

Description

Stamping process and stamping equipment for preventing blanking knife edge of straight-bar stator from cracking
Technical Field
The invention relates to the technical field of stamping equipment, in particular to a stamping process and stamping equipment for preventing a blanking knife edge of a straight bar stator from cracking.
Background
The straight stator in the straight stator motor can be spliced by a plurality of straight stator units, the straight stator units can be produced by a mode of laminating punched straight stator punching sheets, the existing straight high-speed punching equipment directly laminates a plurality of punched punching sheets in a female die after punching the straight stator punching sheets by a flitch to form the straight stator units, and in the forming process, because the female die of the laminated straight stator units has sharp corners, and the laminated straight stator punching sheets can deform, and the laminated punching sheets can extrude the female die, the sharp corners on the female die can generate stress concentration and the stator blanking knife edge cracks frequently, and because the stator blanking female die in the punching equipment is large, the loss cost is continuously increased due to the fact that spare parts are replaced for many times; the abnormal time of the die is long, and the production efficiency is low due to frequent die disassembly and assembly; meanwhile, the punched product is easy to be damaged by pulling, so that the quality of the product is reduced.
Disclosure of Invention
The invention aims to provide a stamping process and stamping equipment for preventing a blanking knife edge of a straight bar stator from cracking, and aims to solve the technical problem that the blanking knife edge is easy to break when the straight bar stator is stamped in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a stamping process for avoiding cracking of a blanking knife edge of a straight bar stator, wherein stamping of two wings of a stator tooth comprises a pre-stamping step and a forming stamping step; wherein the content of the first and second substances,
the pre-stamping step needs to stamp buffer holes corresponding to two wings of the stator teeth, each buffer hole comprises an outer contour line and an inner contour line which are in smooth transition connection, the inner contour lines are matched with the contours of corners of the end parts of the stator teeth, and the outer contour lines are smooth transition lines;
and the forming and stamping step is used for forming the complete stator teeth in a stamping mode.
Optionally, the inner contour line is fitted to an inside corner of the end of the stator tooth.
Optionally, the buffer holes are L-shaped.
Optionally, the step of punching the straight stator punching sheet includes firstly, punching a pilot hole; secondly, punching a buffer hole; thirdly, punching triangular holes; fourthly, punching a metering hole; fifthly, punching a buckling point; and sixthly, stamping the residual splicing surfaces of the straight stator punching sheets.
Optionally, after the pre-stamping step, the knife edges are lubricated with a lubricant.
Optionally, the lubrication site includes a buffer hole inner wall.
Optionally, the lubricant is punching oil, and the punching oil is lubricated in a continuous oil dripping manner.
The punching equipment adopts the punching process for avoiding the breakage of the blanking knife edge of the straight bar stator to punch.
Optionally, the punching equipment comprises an oil dripping device which can drip oil to lubricate the buffer hole during punching.
Optionally, the oil dripping device comprises an oil supply assembly and an oil hole formed in the stamping equipment, the oil supply assembly can supply oil to the oil hole, and the oil hole is formed in a position corresponding to the upper portion of the buffer hole so that the oil can drip into the buffer hole.
The invention provides a stamping process for avoiding cracking of a blanking blade of a straight stator, wherein the stamping of two wings of a stator tooth comprises a pre-stamping step and a forming stamping step, the pre-stamping step needs to stamp buffer holes corresponding to the two wings of the stator tooth, and the forming stamping step is used for stamping and forming a complete stator tooth.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic view of the shapes of the straight stator punching sheet and the buffer hole.
In fig. 1, stator teeth; 2. a buffer hole; 3. an outer contour line; 4. an inner contour; 5. and (6) turning.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The invention provides a stamping process for avoiding breakage of a blanking knife edge of a straight stator, as shown in figure 1, stamping of two wings of a stator tooth 1 comprises a pre-stamping step and a forming stamping step, wherein a buffer hole 2 corresponding to the two wings of the stator tooth 1 needs to be stamped in the pre-stamping step, the buffer hole 2 comprises an outer contour line 3 and an inner contour line 4 which are in smooth transition connection, the inner contour line 4 is matched with the contour of a corner 5 at the end part of the stator tooth 1, and the outer contour line 3 is a smooth transition line; and the forming and stamping step is used for forming the complete stator teeth 1 in a stamping mode.
According to the invention, two wing parts of the stator teeth 1 are punched twice, the buffer holes 2 in smooth transition are punched firstly, and then the complete stator teeth 1 are punched, so that a knife edge with a sharp corner cannot appear on the female die at the part for punching the stator teeth 1, stress concentration caused by the sharp corner appearing on the female die during punching is avoided, and the blanking knife edge on the female die is not easy to break during punching;
meanwhile, the straight stator punching sheets can fall into the female die after being stamped, the plurality of straight stator punching sheets are laminated in the female die to form a straight stator unit, when the straight stator punching sheets are laminated, the punching sheets can deform in the female die to extrude the female die, the original female die knife edge can generate sharp corners at the stator tooth 1 part to generate stress concentration, and the female die is broken in the stamping process; in the pre-stamping step, the buffer holes 2 with rounded corners are stamped on the stator teeth 1, so that the condition that sharp corners exist on the edges of the stator teeth 1 by the female die is avoided, stress concentration is avoided, and the edges of the female die are not easy to break.
In an alternative embodiment, the inner contour 4 is engaged with an inner corner 5 of the end of the stator tooth 1.
The inner contour line 4 is matched with the corner 5 close to the inner side of the end part of the stator tooth 1, the edge of the corner 5 close to the inner side of the end part of the stator tooth 1 is punched with the buffer hole 2, and the dimensional accuracy of the inner side of the stator tooth 1 playing an important role can be ensured on the premise of ensuring that a female die cannot be broken.
As an alternative embodiment, the buffer holes 2 are L-shaped.
The buffer hole 2 is L-shaped, and particularly, the buffer hole 2 positioned at the edge of the corner 5 close to the inner side of the end part of the stator tooth 1 is L-shaped, so that the stamping area of the buffer hole 2 can be reduced, and the stator tooth 1 is ensured not to deform.
As an optional embodiment, the step of punching the straight stator punching sheet is that, firstly, a pilot hole is punched; secondly, punching a buffer hole 2; thirdly, punching triangular holes; fourthly, punching a metering hole; fifthly, punching a buckling point; and sixthly, stamping the residual splicing surfaces of the straight stator punching sheets.
The method comprises the steps of firstly, punching a pilot hole, punching the pilot hole on a material plate, and fixing the position of the material plate by using the pilot hole so as to facilitate the next step of punching; secondly, punching a buffer hole 2; thirdly, punching triangular holes at the joints between the straight-tooth stator punching sheets; fourthly, punching metering holes on the material plates; fifthly, punching buckling points to facilitate laminating a plurality of straight tooth stator punching sheets together; and sixthly, stamping the residual splicing surface of the straight-bar stator stamped sheet, so that the whole straight-bar stator stamped sheet falls into the female die, and the lamination is convenient.
As an alternative embodiment, the knife edges are lubricated with a lubricant after the pre-stamping step.
After the pre-stamping step, the invention uses the lubricant to lubricate the knife edge, thereby being beneficial to the lubrication during the stamping and blanking and greatly reducing the strain of the product.
As an alternative embodiment, the lubrication site comprises the inner wall of the buffer hole 2.
The lubricating position comprises the inner wall of the buffer hole 2, and the inner wall of the buffer hole 2 comprises part of the stator teeth 1, so that the stator teeth 1 in the buffer hole 2 can be partially lubricated, and burrs of the stator teeth 1 can be removed during secondary stamping.
As an alternative embodiment, the lubricant is punching oil, and the punching oil is lubricated in a continuous oil drop manner.
The lubricant is stamping oil, and the stamping oil is lubricated in a continuous oil dripping mode, so that the stamping part can be effectively radiated while the stamping oil is lubricated.
The punching equipment adopts the punching process for avoiding the breakage of the blanking knife edge of the straight bar stator to punch.
As an alternative embodiment, the punching device includes an oil dripping device which can drip oil for lubrication at the buffer hole 2 at the time of punching, can lubricate the stator teeth 1 portion at the time of punching, and can effectively dissipate heat.
As an alternative embodiment, the oil dripping device comprises an oil supply assembly and oil holes formed in the stamping equipment, the oil supply assembly can supply oil to the oil holes, and the oil holes are formed in corresponding positions above the buffer holes 2 so that the oil can drip into the buffer holes 2; specifically, still include a plurality of oil grooves, stamping equipment is including the blanking plate of installation terrace die, and the die is installed at the lower terminal surface of blanking plate, and the up end at the blanking plate is seted up to the oil groove, oilhole intercommunication terrace die lateral wall and oil groove, and fluid feed arrangement supplies fluid to the oil groove in, and fluid flows to the terrace die lateral wall by the oilhole through the oil groove, and then lubricates 2 parts in the buffer hole.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. The stamping process for avoiding the cracking of the blanking knife edge of the straight bar stator is characterized by comprising the following steps of: the punching of the two wings of the stator tooth comprises a pre-punching step and a forming punching step; wherein the content of the first and second substances,
the pre-stamping step needs to stamp buffer holes corresponding to two wings of the stator teeth, each buffer hole comprises an outer contour line and an inner contour line which are in smooth transition connection, the inner contour lines are matched with the contours of corners of the end parts of the stator teeth, and the outer contour lines are smooth transition lines;
and the forming and stamping step is used for forming the complete stator teeth in a stamping mode.
2. The punching process for avoiding the cracking of the blanking knife edge of the straight bar stator according to claim 1, is characterized in that: the inner contour line is matched with the corner close to the inner side of the end part of the stator tooth.
3. The punching process for avoiding the cracking of the blanking knife edge of the straight bar stator according to claim 1, is characterized in that: the buffer hole is L-shaped.
4. The punching process for avoiding the cracking of the blanking knife edge of the straight bar stator according to claim 2, is characterized in that: the method comprises the steps of firstly, punching a pilot hole; secondly, punching a buffer hole; thirdly, punching triangular holes; fourthly, punching a metering hole; fifthly, punching a buckling point; and sixthly, stamping the residual splicing surfaces of the straight stator punching sheets.
5. The punching process for avoiding the breakage of the blanking knife edge of the straight bar stator according to any one of claims 1 to 4, is characterized in that: after the pre-stamping step, the knife edges are lubricated with a lubricant.
6. The punching process for avoiding the cracking of the blanking knife edge of the straight bar stator according to claim 5, is characterized in that: the lubrication site includes an inner wall of the buffer hole.
7. The punching process for avoiding the cracking of the blanking knife edge of the straight bar stator according to claim 5, is characterized in that: the lubricant is punching oil, and the punching oil is lubricated in a continuous oil dripping mode.
8. A stamping apparatus, characterized in that: the punching process for avoiding the breakage of the blanking edge of the straight bar stator is adopted for punching according to any one of claims 1 to 7.
9. The stamping apparatus of claim 8, wherein: the stamping equipment comprises an oil dripping device which can drip oil to lubricate at the buffer hole during stamping.
10. The stamping apparatus of claim 9, wherein: the oil dripping device comprises an oil liquid supply assembly and an oil hole formed in the stamping equipment, the oil liquid supply assembly can supply oil liquid to the oil hole, and the oil hole is formed in the corresponding position above the buffer hole so that the oil liquid can drip into the buffer hole.
CN201911178280.4A 2019-11-27 2019-11-27 Stamping process for preventing blanking knife edge of straight-bar stator from cracking Active CN111054820B (en)

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CN201911178280.4A CN111054820B (en) 2019-11-27 2019-11-27 Stamping process for preventing blanking knife edge of straight-bar stator from cracking

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Application Number Priority Date Filing Date Title
CN201911178280.4A CN111054820B (en) 2019-11-27 2019-11-27 Stamping process for preventing blanking knife edge of straight-bar stator from cracking

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103521605A (en) * 2013-10-12 2014-01-22 芜湖开瑞金属科技有限公司 Flange punching blanking stamping device for automobile exhaust pipe
CN105584074A (en) * 2015-12-04 2016-05-18 宁波澳玛特高精冲压机床股份有限公司 Step-by-step punching machine and step-by-step punching method
CN107649570A (en) * 2017-10-29 2018-02-02 德清振达电气有限公司 A kind of stamping die device of motor stator slice
CN206966457U (en) * 2017-07-18 2018-02-06 江苏钱达能源科技有限公司 A kind of punch press lubrication protection device
CN207952422U (en) * 2018-02-02 2018-10-12 嘉兴和新精冲科技有限公司 Punching, chamfering device with injection system
CN208083189U (en) * 2018-01-10 2018-11-13 上海英汇科技发展有限公司 The molding die of wedge angle type face vehicle window frame panel
KR20190062335A (en) * 2019-05-14 2019-06-05 대영전기 주식회사 Punching processing mold for stator core and stator core manufactured thereby
CN110014081A (en) * 2019-03-12 2019-07-16 浙江实日机电科技有限公司 A kind of motor stator processing technology

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103521605A (en) * 2013-10-12 2014-01-22 芜湖开瑞金属科技有限公司 Flange punching blanking stamping device for automobile exhaust pipe
CN105584074A (en) * 2015-12-04 2016-05-18 宁波澳玛特高精冲压机床股份有限公司 Step-by-step punching machine and step-by-step punching method
CN206966457U (en) * 2017-07-18 2018-02-06 江苏钱达能源科技有限公司 A kind of punch press lubrication protection device
CN107649570A (en) * 2017-10-29 2018-02-02 德清振达电气有限公司 A kind of stamping die device of motor stator slice
CN208083189U (en) * 2018-01-10 2018-11-13 上海英汇科技发展有限公司 The molding die of wedge angle type face vehicle window frame panel
CN207952422U (en) * 2018-02-02 2018-10-12 嘉兴和新精冲科技有限公司 Punching, chamfering device with injection system
CN110014081A (en) * 2019-03-12 2019-07-16 浙江实日机电科技有限公司 A kind of motor stator processing technology
KR20190062335A (en) * 2019-05-14 2019-06-05 대영전기 주식회사 Punching processing mold for stator core and stator core manufactured thereby

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