CN112893797A - Hot extrusion device for rotor end ring - Google Patents
Hot extrusion device for rotor end ring Download PDFInfo
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- CN112893797A CN112893797A CN202011638812.0A CN202011638812A CN112893797A CN 112893797 A CN112893797 A CN 112893797A CN 202011638812 A CN202011638812 A CN 202011638812A CN 112893797 A CN112893797 A CN 112893797A
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- connecting block
- piston
- end ring
- oil
- extrusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/20—Accessories: Details
- B22D17/2015—Means for forcing the molten metal into the die
- B22D17/2069—Exerting after-pressure on the moulding material
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Abstract
本发明公开了一种转子端环热挤压装置，包括液压油缸，上模芯，上模芯内部设置有二次挤压油缸，二次挤压油缸中设有活塞，活塞上设置有活塞杆，活塞上方设置有进油管道，活塞与二次挤压油缸底部设置有储油压力室，二次挤压油缸下部设置有连接块，顶出套通过卡套与二次挤压油缸固定连接。液压油缸对转子进行第一压铸工序后，上模芯中的二次挤压油缸随后带动活塞杆下行，推动与连接块相连的挤压柱对处于半凝固状态下的转子端环进行二次热挤压，所设计的内置第二油缸的上模芯能够大幅提高端环成型后的密度和硬度，增加其抗拉强度和导电率，同时减少转子端环中的气孔和气泡，使产品合格率上升，降低企业压铸成本，利于企业进行市场竞争。
The invention discloses a rotor end ring hot extrusion device, comprising a hydraulic oil cylinder, an upper die core, a secondary extrusion oil cylinder is arranged inside the upper die core, a piston is arranged in the secondary extrusion oil cylinder, and a piston rod is arranged on the piston An oil inlet pipe is arranged above the piston, an oil storage pressure chamber is arranged at the bottom of the piston and the secondary extrusion cylinder, a connecting block is arranged at the lower part of the secondary extrusion cylinder, and the ejector sleeve is fixedly connected to the secondary extrusion cylinder through a ferrule. After the hydraulic cylinder performs the first die-casting process on the rotor, the secondary extrusion cylinder in the upper die core then drives the piston rod down, and pushes the extrusion column connected to the connecting block to perform secondary heating on the rotor end ring in a semi-solidified state. Extrusion, the designed upper die core with a built-in second oil cylinder can greatly improve the density and hardness of the end ring after forming, increase its tensile strength and electrical conductivity, and at the same time reduce the pores and air bubbles in the rotor end ring, so that the product qualification rate Increase, reduce the cost of die-casting enterprises, and help enterprises to compete in the market.
Description
Technical Field
The invention relates to the field of motor rotor manufacturing, in particular to a hot extrusion device for a rotor end ring.
Background
At present, the equipment of die-casting motor rotor end ring is once only die-casting usually, and this kind of one shot die-casting fashioned device advantage is that manufacturing procedure is few, but the fashioned rotor end ring of once only die-casting has a lot of defects in practical application, because rotor end ring shape is various, and comparatively complicated end ring is only through once only die-casting, and more gas pocket and bubble often can appear in surface or inside, reduce the product percent of pass, make the manufacturing cost of enterprise improve. In addition, the improvement of the rotating speed of the existing motor has higher requirements on the tensile strength and the electric conductivity of the rotor end ring, the rotor end ring formed by one-time die casting is generally low in density and low in hardness, the phenomena of ring breakage, ring falling and the like are easy to occur in practical application, the induced current of the motor is influenced, and the performance requirement of the motor cannot be met.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a device capable of carrying out hot extrusion on a rotor end ring in a semi-solidified state after die casting.
The technical scheme adopted by the invention is as follows: a hot extrusion device for a rotor end ring comprises a hydraulic oil cylinder and an upper die core connected with the hydraulic oil cylinder, wherein an upper die which is coaxial with the upper die core is arranged below the upper die core, the upper die is fixedly connected to the middle part of an upper die supporting frame, and a lower die is arranged below the upper die; the method is characterized in that: a secondary extrusion oil cylinder is arranged in the upper die core, a piston is arranged in the secondary extrusion oil cylinder, a piston rod is arranged on the piston, an oil inlet pipeline is arranged above the piston, an oil storage pressure chamber is arranged at the bottom of the piston and the secondary extrusion oil cylinder, and an oil outlet pipeline communicated with the oil storage pressure chamber is arranged on the side of the oil storage pressure chamber; the lower part of the secondary extrusion oil cylinder is provided with a connecting block, the upper part of the connecting block is connected with a piston rod, and the lower part of the connecting plate is connected with an ejection sleeve through an extrusion column; the ejection sleeve is fixedly connected with the secondary extrusion oil cylinder through a clamping sleeve.
Furthermore, the outer diameter of the upper die core is equal to the inner diameter of the upper die.
Furthermore, the piston rod is vertically arranged on the piston in a penetrating manner, and the piston rod and the piston are of an integrated structure.
Furthermore, a groove chamber is formed in the upper surface of the piston and communicated with the oil inlet pipeline.
Preferably, the outer edge of the groove chamber is provided with an oil guide bevel opening, and the oil inlet pipeline is arranged at the oil guide bevel opening of the groove chamber.
Furthermore, the oil storage pressure chamber be the ladder structure of the cavity of going up narrowly, cavity of resorption width, oil outlet pipe set up in the cavity of resorption of oil storage pressure chamber side.
Furthermore, the connecting block include the first connecting block that top-down arranged in proper order, second connecting block and third connecting block, first connecting block link firmly with the below of piston rod, first connecting block and second connecting block, third connecting block pass through the spliced pole fixed, the extrusion post set up on the third connecting block, the third connecting block pass through the extrusion post and link to each other with ejecting cover.
Furthermore, a positioning column is vertically arranged in the center of the lower die and is fixedly connected with the lower die through a trapezoidal clamping groove.
Still further, the upper end of the positioning column is of a round table structure with a small diameter surface facing upwards.
Compared with the prior art, the built-in secondary extrusion oil cylinder is designed in the upper die core below the hydraulic oil cylinder, and the secondary hot extrusion can be carried out in a semi-solidification state after the die casting of the rotor end ring. In addition, in industrial production, the hot extrusion's setting can effectively reduce bubble and gas pocket in the end ring, improves shaping rotor end ring quality, guarantees the product percent of pass of die casting, is favorable to practicing thrift the die-casting cost of enterprise and carries out market competition. On the other hand, the molded rotor adopting the die-casting end ring has stronger tensile strength and excellent conductivity, so that the rotating speed of the motor can be increased in practical application, the performance requirement is met, and the service life of the motor is longer.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of the upper core of the present invention;
fig. 3 is a schematic structural view of the connecting block of the present invention:
FIG. 4 is a schematic structural view of the upper mold support of the present invention (a is a vacuum passage);
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings and the detailed description. It is to be understood that the described embodiments are merely exemplary of a portion of the invention and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the hot extrusion device for the rotor end ring comprises a hydraulic oil cylinder 1 and an upper die core 2 connected with the hydraulic oil cylinder 1, wherein an upper die 3 coaxial with the upper die core 2 is arranged below the upper die core 2, the upper die 3 is fixedly connected to the middle part of an upper die supporting frame 4, and a lower die 5 is arranged below the upper die 3;
as shown in fig. 2, a secondary extrusion cylinder 20 is arranged inside the upper die core 2, a piston 21 is arranged in the secondary extrusion cylinder 20, a piston rod 22 is arranged on the piston 21, an oil inlet pipeline 23 is arranged above the piston 21, an oil storage pressure chamber 24 is arranged at the bottom of the piston 21 and the secondary extrusion cylinder 20, and an oil outlet pipeline 25 communicated with the oil storage pressure chamber 24 is arranged at the side of the oil storage pressure chamber 24; the lower part of the secondary extrusion oil cylinder 20 is provided with a connecting block 26, the upper part of the connecting block 26 is connected with the piston rod 22, and the lower part of the connecting block 26 is connected with an ejection sleeve 28 through an extrusion column 27; the ejection sleeve 28 is fixedly connected with the secondary extrusion oil cylinder 20 through a cutting sleeve 29.
Furthermore, the outer diameter of the upper mold core 2 is equal to the inner diameter of the upper mold 3.
The piston rod 22 is vertically penetrated on the piston 21, and the piston rod 22 and the piston 21 are of an integrated structure. The outer edge of the groove chamber 211 is provided with an oil guide bevel opening, and the oil inlet pipeline 23 is arranged at the oil guide bevel opening of the groove chamber 211. The oil guide inclined opening is beneficial to rapid oil supply of the oil inlet pipeline 23 and provides sufficient hydraulic oil pressure for the downward movement of the piston 21 and the piston rod 22.
Preferably, the oil storage pressure chamber 24 is in a stepped structure with a narrow upper chamber and a wide lower chamber, and the oil outlet pipeline 25 is arranged on the lower chamber side of the oil storage pressure chamber 24. The chamber structure with narrow top and wide bottom can provide enough downward stroke for the piston rod 22 while providing an oil storage space, and does not influence the extraction of hydraulic oil from the oil outlet pipeline 23.
As shown in fig. 3, the connecting block 26 includes a first connecting block 26a, a second connecting block 26b and a third connecting block 26c, which are sequentially arranged from top to bottom, the first connecting block 26a is fixedly connected with the lower portion of the piston rod 22, the first connecting block 26a, the second connecting block 26b and the third connecting block 26c are fixed by 4 connecting columns 26d, the extruding column 27 is disposed on the third connecting block 26c, and the third connecting block 26c is connected with the ejecting sleeve 28 by 10 extruding columns 27. It should be noted that the number of the extruding posts 27 and the connecting posts 26d is not fixed 4 or 10, and the number of the posts can be increased or decreased in practical production according to the requirement of die casting.
Preferably, a positioning column 6 is vertically arranged at the center of the lower die 5, and the positioning column 6 is fixedly connected with the lower die 5 through a trapezoidal clamping groove. The upper end of the positioning column 6 is of a circular truncated cone structure with a small diameter surface facing upwards, the diameter of the bottom surface of the circular truncated cone is equal to the inner diameter of the ejection sleeve 28, and the positioning column 6 is used for fixing rotor cores with different heights.
As shown in fig. 4, a vacuum pipeline a for exhausting air is further provided in the upper die 3 and the upper die supporting frame 4, the vacuum pipeline a first vacuums the die-casting cavity before die-casting, and continuously works after the lower die core 2 is pressed down, so as to pump out residual gas brought by the outer wall of the lower die core 2, the inner wall of the upper die 3 and a pressure chamber, and keep the vacuum state in the die-casting cavity all the time.
The invention can be summarized into two processes when die casting the end ring of the rotor, firstly, the hydraulic oil cylinder 1 drives the whole upper die core 2 to carry out the first die casting on the rotor, then, the second oil cylinder 20 in the upper die core 2 starts to work, the oil inlet pipeline 23 supplies oil downwards, the piston rod 22 of the piston 21 is pushed to descend, the bottom of the piston rod 22 drives the lower connecting block 26 to descend, the extrusion column 27 in the ejection sleeve 28 carries out the second hot extrusion on the semi-solidified end ring after receiving the pressure from the connecting block 26c, after the hot extrusion is finished, the hydraulic oil in the oil storage pressure chamber 24 is extracted from the oil outlet pipeline 25, and the extrusion column 27, the connecting block 26, the piston 21 and the piston rod 22 return. The vacuum pipeline a that sets up in mould 3 and last mould support frame 4 continues to work at whole die-casting in-process, guarantees that the die-casting die cavity is in vacuum state, and cooperation die-casting and hot extrusion procedure make the rotor end ring density and the hardness after the shaping improve by a wide margin, increase its tensile strength and conductivity, for the cost is practiced thrift to the enterprise, guarantees the product percent of pass of die casting.
Claims (9)
1. A hot extrusion device for a rotor end ring comprises a hydraulic oil cylinder (1) and an upper mold core (2) connected with the hydraulic oil cylinder (1), wherein an upper mold (3) coaxial with the upper mold core (2) is arranged below the upper mold core (2), the upper mold (3) is fixedly connected to the middle part of an upper mold supporting frame (4), and a lower mold (5) is arranged below the upper mold (3); the method is characterized in that: a secondary extrusion oil cylinder (20) is arranged in the upper die core (2), a piston (21) is arranged in the secondary extrusion oil cylinder (20), a piston rod (22) is arranged on the piston (21), an oil inlet pipeline (23) is arranged above the piston (21), oil storage pressure chambers (24) are arranged at the bottoms of the piston (21) and the secondary extrusion oil cylinder (20), and oil outlet pipelines (25) communicated with the oil storage pressure chambers (24) are arranged on the lateral sides of the oil storage pressure chambers (24); the lower part of the secondary extrusion oil cylinder (20) is provided with a connecting block (26), the upper part of the connecting block (26) is connected with the piston rod (22), and the lower part of the connecting block (26) is connected with an ejection sleeve (28) through an extrusion column (27); the ejection sleeve (28) is fixedly connected with the secondary extrusion oil cylinder (20) through a clamping sleeve (29).
2. A rotor end ring hot extrusion apparatus as claimed in claim 1, wherein: the outer diameter of the upper die core (2) is equal to the inner diameter of the upper die (3).
3. A rotor end ring hot extrusion apparatus as claimed in claim 1, wherein: the piston rod (22) is vertically arranged on the piston (21) in a penetrating manner, and the piston rod (22) and the piston (21) are of an integrated structure.
4. A rotor end ring hot extrusion apparatus as claimed in claim 1, wherein: a groove chamber (211) is formed in the upper surface of the piston (21), and the groove chamber (211) is communicated with the oil inlet pipeline (23).
5. An end ring hot extrusion apparatus as claimed in claim 4, wherein: the outer edge of the groove chamber (211) is provided with an oil guide bevel opening, and the oil inlet pipeline (23) is arranged at the oil guide bevel opening of the groove chamber (211).
6. An end ring hot extrusion apparatus as claimed in claim 1, wherein: oil storage pressure chamber (24) be the ladder structure that the cavity is narrow, lower chamber is wide, oil outlet pipeline (25) set up in the lower chamber side of oil storage pressure chamber (24).
7. A rotor end ring hot extrusion apparatus as claimed in claim 1, wherein: the connecting block (26) comprises a first connecting block (26a), a second connecting block (26b) and a third connecting block (26c), wherein the first connecting block (26a) is sequentially arranged from top to bottom, the first connecting block (26a) is fixedly connected with the lower portion of the piston rod (22), the first connecting block (26a) is fixed with the second connecting block (26b) and the third connecting block (26c) through a connecting column (26d), the extrusion column (27) is arranged on the third connecting block (26c), and the third connecting block (26c) is connected with the ejection sleeve (28) through the extrusion column (27).
8. A rotor end ring hot extrusion apparatus as claimed in claim 1, wherein: the center of the lower die (5) is vertically provided with a positioning column (6), and the positioning column (6) is fixedly connected with the lower die (5) through a trapezoidal clamping groove.
9. A rotor end ring hot extrusion apparatus as claimed in claim 8, wherein: the upper end of the positioning column (6) is of a round table structure with a small diameter surface facing upwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011638812.0A CN112893797A (en) | 2020-12-31 | 2020-12-31 | Hot extrusion device for rotor end ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011638812.0A CN112893797A (en) | 2020-12-31 | 2020-12-31 | Hot extrusion device for rotor end ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112893797A true CN112893797A (en) | 2021-06-04 |
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ID=76112096
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011638812.0A Pending CN112893797A (en) | 2020-12-31 | 2020-12-31 | Hot extrusion device for rotor end ring |
Country Status (1)
| Country | Link |
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| CN (1) | CN112893797A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5647251A (en) * | 1979-09-25 | 1981-04-28 | Nissan Motor Co Ltd | Two-stage injection die-casting device |
| US5887643A (en) * | 1995-05-19 | 1999-03-30 | Fanuc Ltd | Conductor casting apparatus for a squirrel-cage rotor of an induction motor |
| WO2002090020A1 (en) * | 2001-05-04 | 2002-11-14 | Alcast S.R.L. | Method and device for quickly and economically forming at least one die casting without casting material wastage |
| KR20080041337A (en) * | 2006-11-07 | 2008-05-13 | 오일광 | Multi-stage pressure casting and forging mold unit using press device and its method |
| KR20110016561A (en) * | 2009-08-12 | 2011-02-18 | 한국생산기술연구원 | Rotor casting device of squeeze bar pressurization method, rotor and casting method using the same |
| CN109047703A (en) * | 2018-11-02 | 2018-12-21 | 文春领 | Middle pressure antigravity casting technique |
| CN215356087U (en) * | 2020-12-31 | 2021-12-31 | 合肥迈瑞克智能铸造科技有限公司 | Hot extrusion device for rotor end ring |
-
2020
- 2020-12-31 CN CN202011638812.0A patent/CN112893797A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5647251A (en) * | 1979-09-25 | 1981-04-28 | Nissan Motor Co Ltd | Two-stage injection die-casting device |
| US5887643A (en) * | 1995-05-19 | 1999-03-30 | Fanuc Ltd | Conductor casting apparatus for a squirrel-cage rotor of an induction motor |
| WO2002090020A1 (en) * | 2001-05-04 | 2002-11-14 | Alcast S.R.L. | Method and device for quickly and economically forming at least one die casting without casting material wastage |
| KR20080041337A (en) * | 2006-11-07 | 2008-05-13 | 오일광 | Multi-stage pressure casting and forging mold unit using press device and its method |
| KR20110016561A (en) * | 2009-08-12 | 2011-02-18 | 한국생산기술연구원 | Rotor casting device of squeeze bar pressurization method, rotor and casting method using the same |
| CN109047703A (en) * | 2018-11-02 | 2018-12-21 | 文春领 | Middle pressure antigravity casting technique |
| CN215356087U (en) * | 2020-12-31 | 2021-12-31 | 合肥迈瑞克智能铸造科技有限公司 | Hot extrusion device for rotor end ring |
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Effective date of registration: 20250626 Address after: 230000 Anhui Province Hefei City Feixi County Sanhe Town Chaping Village Chaping Team 139.NO Applicant after: Hefei Yingguo Intelligent Technology Co.,Ltd. Country or region after: China Address before: 231200 Anhui Province Hefei City Feixi County Taohua Industrial Park Expansion Zone Tongkou Road and Wenshan Road Intersection Hefei Wanhang Industry Co., Ltd. 13# Factory Building Applicant before: Hefei Meiruike intelligent Casting Technology Co.,Ltd. Country or region before: China |