Stator core welding device

Abstract

The utility model relates to the field of stator processing technology, and in particular to a stator core welding device. The welding device includes a hydraulic press, a pressure head is provided at the upper end of the hydraulic press, a bottom plate is provided at the lower end of the hydraulic press, a base is detachably installed on the bottom plate, an inflatable shaft is provided on the base, the inflatable shaft includes a main shaft body and an air bag provided in the main shaft body, a lower end fixed joint is provided at the lower end of the air bag, an upper end fixed joint is provided at the upper end of the air bag, an air nozzle is provided on the upper end fixed joint, a plurality of open grooves are provided at intervals in the circumference of the main shaft body, an inflatable slider is slidably provided at the open groove, one side of the inflatable slider is located inside the main shaft body, and the other side of the inflatable slider extends out of the main shaft body through the open groove, and a positioning block is provided on one of the inflatable sliders. The utility model realizes radial positioning by tightening the inside of the stator punching sheet, and the stacking operation of the punching sheets is convenient and quick, which can improve the installation and welding efficiency, and the pressure plate and the pressure tube axially press and position the stator punching sheet firmly and accurately.

Description

Technical Field

[0001] The utility model relates to the technical field of stator processing, in particular to a stator core welding device. Background Art

[0002] The motor stator is made of stacked silicon steel sheets, which are generally welded in a welding manner. Several welds are welded axially on the outer circle of the stacked stator. The silicon steel sheets can be firmly connected together by self-melting welding. This not only simplifies the process, but also increases the insulation resistance between the stator silicon steel sheets and the effective magnetic conductive cross-section, thereby improving the quality of the motor. The existing stators have problems such as difficult positioning, loose fixation, and high welding scrap rate when overlapped.

[0003] A Chinese patent with application number CN201710045794.7 discloses a stator sheet welding skew tool, comprising a lower cover plate and an upper cover plate that cooperates with the lower cover plate to clamp the stator laminations, the lower cover plate is provided with a positioning core rod, the stator laminations are sleeved outside the positioning core rod; a skew groove is provided on the side wall of the positioning core rod, a skew bar is clamped in the skew groove; the inner half of the skew bar is clamped in the skew groove, and the outer half of the skew bar protrudes outside the skew groove and is clamped and positioned with the stator lamination wire embedding groove. The tooling sleeves the outer sleeve onto the shaft core and inflates the airbag to fix the outer sleeve onto the shaft core. The wire embedding grooves of the stator punching sheets are positioned one by one with the twisting strips and overlapped and arranged on the positioning core rod under the guidance of the twisting strips. The positioning and clamping effects are improved under the guidance of the twisting strips. However, when it is used, due to the small matching clearance between the stator sheets and the positioning core rod, it is not very convenient to stack the stator sheets for installation, which affects the installation and welding efficiency. Utility Model Content

[0004] The utility model aims to solve the technical problem that the matching clearance between the stator single piece and the positioning core rod of the existing stator sheet welding tool is small, which makes the stacking installation of the stator single piece inconvenient and affects the installation and welding efficiency. A stator core welding device is provided. After the stator punching sheets are assembled, they are tightened from the inside, so that the stacking operation of the punching sheets is more convenient and quick, and at the same time, the stator punching sheets can be better positioned radially. The stator punching sheets can be axially pressed and positioned by cooperating with the pressure plate and the pressure tube. The positioning is firm, and the coordination of the positioning block and the positioning mark can accurately limit the stator punching sheets. The utility model has strong versatility and can ensure the welding quality.

[0005] The technical solution adopted by the utility model to achieve the above-mentioned purpose is: a stator core welding device, including a hydraulic press, a pressure head is provided at the upper end of the hydraulic press, and a bottom plate is provided at the lower end of the hydraulic press, characterized in that: a base is detachably installed on the bottom plate, the base is arranged opposite to the pressure head, an inflatable shaft is provided on the base, the inflatable shaft includes a main shaft body and an air bag arranged in the main shaft body, a lower end fixed joint is provided at the lower end of the air bag, an upper end fixed joint is provided at the upper end of the air bag, the upper end fixed joint extends out of the main shaft body, an air nozzle is provided on the upper end fixed joint, a plurality of vertical open grooves are provided at intervals in the circumference of the main shaft body, an inflatable slider is slidably provided at the open groove, one side of the inflatable slider is located inside the main shaft body, and the other side of the inflatable slider extends out of the main shaft body through the open groove, and a positioning block for positioning the stator punching sheet is provided on one of the inflatable sliders.

[0006] Furthermore, the inflatable slider includes a limit block and a tightening block, the limit block and the tightening block are connected by screws, the limit block is located inside the main shaft body, the limit block has a step surface for abutting against the inner wall of the main shaft body, the tightening block extends out of the main shaft body through an open groove, the positioning block is vertically installed on the tightening block, and the outer surface of the positioning block protrudes from the outer surface of the tightening block.

[0007] Furthermore, a positioning mark for positioning the stator punching sheet is provided on the base.

[0008] Furthermore, the base is also provided with a welding groove matching the welding slot hole of the stator punching sheet.

[0009] Furthermore, a main shaft head is arranged at the upper end of the main shaft body, and the upper end fixing joint passes through the main shaft head and extends out of the main shaft body, and a fastening nut is threadedly connected to the upper end fixing joint.

[0010] Furthermore, a main shaft seat is arranged at the lower end of the main shaft body, and the main shaft seat is arranged on the base through a cylindrical pin.

[0011] Furthermore, the upper end fixing joint and the lower end fixing joint are respectively arranged at the upper end and the lower end of the airbag by buckles.

[0012] Furthermore, the air nozzle is a pointed air nozzle.

[0013] Furthermore, the main shaft body is provided with four vertical open slots spaced apart in the circumferential direction.

[0014] Furthermore, the device also includes a pressing plate and a pressing tube for pressing the stator punching sheets, and the pressing plate is provided with a guide bar for limiting the position of the pressing tube.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] (1) The stator core welding device of the utility model is capable of tightening the stator punching sheets from the inside after they are assembled, making the stacking operation of the punching sheets more convenient and quicker, and at the same time being able to better radially position the stator punching sheets, and can cooperate with the pressure plate and the pressure tube to axially press and position the stator punching sheets, and the positioning is firm, which can play a role in rapid clamping and positioning, shortening the time cost, and having an ingenious design, simple structure, and high processing precision, which can greatly improve production efficiency, reduce production costs, and reduce scrap rate.

[0017] (2) In the stator core welding device of the utility model, a vertical positioning block is provided on one of the air-expanding sliders. The positioning block protrudes from the outer surface of the air-expanding slider and is engaged with the corresponding wire hole on the stator punching sheet. It can be applied to most stator punching sheet structures and has stronger versatility. Through the cooperation of the positioning mark on the base, the installation position of the stator punching sheet can be accurately defined, thereby avoiding the position deviation and misalignment of the stator punching sheet and ensuring the welding quality of the stator punching sheet.

[0018] (3) The stator core welding device of the utility model is also provided with a welding groove on the base that matches the welding slot hole of the stator punching sheet, which can ensure the welding quality of the bottom stator punching sheet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural diagram of the stator core welding tooling of the utility model.

[0020] Figure 2 This is a structural exploded view of the stator core welding tooling of the utility model (excluding the hydraulic press part).

[0021] Figure 3 It is a schematic diagram of the structure of the air shaft of the stator core welding tooling of the utility model.

[0022] Figure 4 It is a structural cross-sectional view of the gas expansion slider of the stator core welding tooling of the utility model.

[0023] Figure 5 This is the structural diagram of the stator punching.

[0024] In the figure: 1. hydraulic press, 2. pressure head, 3. bottom plate, 4. base, 41. welding groove, 5. main shaft body, 51. open groove, 6. air bag, 7. main shaft seat, 8. cylindrical pin, 9. main shaft head, 10. buckle, 11. lower end fixed joint, 12. upper end fixed joint, 13. fastening nut, 14. air nozzle, 15. air expansion slider, 151. limit block, 152. top tightening block, 16. positioning block, 17. screw, 18. pressure plate, 19. guide bar, 20. pressure tube, 21. stator punching sheet, 211. positioning hole, 212. wire hole, 213. welding slot hole. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited to the specific embodiments.

[0026] like Figure 1-4 A stator core welding device shown in the figure comprises a hydraulic press 1, a pressure head 2 is arranged at the upper end of the hydraulic press 1, a bottom plate 3 is arranged at the lower end of the hydraulic press 1, a base 4 is detachably mounted on the bottom plate 3, the base 4 is arranged opposite to the pressure head 2, an inflatable shaft is arranged at the middle part of the upper end of the base 4, the inflatable shaft comprises a main shaft body 5 and an air bag 6 arranged in the main shaft body 5, a main shaft seat 7 is arranged at the lower end of the main shaft body 5, the main shaft seat 7 is arranged on the base 4 through a cylindrical pin 8, a main shaft head 9 is arranged at the upper end of the main shaft body 5, and a lower end fixing joint 11 is arranged at the lower end of the air bag 6 through a buckle 10, and the lower end fixing joint 11 can seal the gas to prevent the gas from escaping Leakage, the upper end of the airbag 6 is provided with an upper end fixing joint 12 through a buckle 10, the upper end fixing joint 12 passes through the main shaft head 9 and extends out of the main shaft body 5, a fastening nut 13 is threadedly connected to the upper end fixing joint 12, and a pointed air nozzle 14 is provided on the upper end fixing joint 12. Four vertical opening grooves 51 are spaced apart in the circumferential direction of the main shaft body 5, and an air-expanding slider 15 is slidably provided at the opening groove 51. One side of the air-expanding slider 15 is located inside the main shaft body 5, and the other side of the air-expanding slider 15 extends out of the main shaft body 5 through the opening groove 51, and a positioning block 16 for positioning the stator punching sheet 21 is provided on one of the air-expanding sliders 15.

[0027] Preferably, the gas expansion slider 15 includes a limit block 151 and a tightening block 152, which are connected by an M5*10 cross countersunk screw 17. The limit block 151 is located inside the main shaft body 5, and the limit block 151 has a step surface for abutting against the inner wall of the main shaft body 5. The setting of the step surface can prevent the gas expansion slider 15 from separating from the main shaft body 5. The tightening block 152 extends out of the main shaft body 5 through the opening groove 51. The positioning block 16 is vertically installed on the tightening block 152, and the outer surface of the positioning block 16 protrudes from the outer surface of the tightening block 152.

[0028] Preferably, a positioning mark (not shown in the figure) for positioning the stator punching sheet 21 is provided on the base 4 , and a welding groove 41 matching the welding slot hole 213 on the stator punching sheet 21 is also provided on the base 4 .

[0029] Preferably, the device also includes a pressing plate 18 and a pressing tube 20 for pressing the stator punching sheet 21. The pressing plate 18 is provided with a guide bar 19 for limiting the position of the pressing tube 20. The guide bar 19 can conveniently and quickly limit the position of the pressing tube 20, thereby better playing the role of pressing and positioning the stator punching sheet 21.

[0030] When the stator core welding tool of the utility model is used: Figure 5The stator punching sheets 21 shown are assembled one by one onto the uninflated inflatable shaft, and the direction of the stator punching sheet 21 is positioned by the positioning mark on the base 4 and the positioning block 16 on one of the inflatable sliders 15. At this time, the positioning block 16 is inserted into the wire hole 212 of the stator punching sheet 21, and the positioning hole 211 on the stator punching sheet 21 is aligned with the positioning mark on the base 4, and the welding slot 213 on the stator punching sheet 21 is aligned with the welding slot 41 on the base 4. The welding position of the stator punching sheet 21 can be better defined by the positioning mark and the positioning block 16, and the welding slot 41 on the base 4 can ensure the welding quality of the bottom stator punching sheet 21. After the assembly height of the stator punching sheet 21 reaches the requirement, the airbag 6 is inflated through the air nozzle 14. Usually, the inner hole of the workpiece is φ74, and the airbag 6 is inflated. When the expansion shaft is not inflated, the outer circle of the cylinder formed by the four inflatable sliders 15 is smaller than φ74 (about φ72). After being filled with 0.7MPa compressed air, the airbag 6 expands and pushes out the four inflatable sliders 15. At this time, the outer circle of the cylinder formed by the four inflatable sliders 15 is larger than φ74. The radial force aligns all the stator punchings 21. A pressing plate 18 and a pressing tube 20 are placed on the top stator punching 21. The pressing tube 20 is guided and positioned by the guide bar 19. The pressing head 2 presses the pressing tube 20 and the pressing plate 18 to achieve the axial force compression and positioning of the stator punching 21. When the height of the stator punching 21 is not suitable, it can be deflated. After increasing or decreasing the number of stator punchings 21, it can be inflated and pressed again. After the stator punching 21 is fixed, the stator punching 21 is welded and fixed at the welding groove 213 by argon arc welding.

[0031] The stator core welding device of the utility model can tighten the stator punching sheets from the inside after the stator punching sheets are assembled, so that the stacking operation of the stator punching sheets is more convenient and quick, and at the same time, the stator punching sheets can be better positioned radially, and the stator punching sheets can be axially pressed and positioned in cooperation with the pressure plate and the pressure tube, and the positioning is firm, which can play a role in rapid clamping and positioning, thereby shortening the time cost. A vertical positioning block is provided on one of the air-expanding sliders, and the positioning block protrudes from the outer surface of the air-expanding slider and is engaged with the corresponding wire hole on the stator punching sheet, which can be applicable to most stator punching sheet structures and has stronger versatility. Through the cooperation of the positioning marks on the base, the installation position of the stator punching sheet can be accurately defined, thereby avoiding the phenomenon of position offset and dislocation of the stator punching sheet, and ensuring the welding quality of the stator punching sheet. The utility model has the advantages of ingenious design, simple structure and high processing precision, which can greatly improve the production efficiency, reduce the production cost and reduce the scrap rate.

[0032] The above contents are further detailed descriptions of the utility model in combination with the preferred technical solutions, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, simple deductions and substitutions can be made without departing from the concept of the utility model, which should be regarded as the protection scope of the utility model.

Claims

1. A stator core welding device, comprising a hydraulic press, a pressure head is provided at the upper end of the hydraulic press, and a bottom plate is provided at the lower end of the hydraulic press, characterized in that: A base is detachably mounted on the bottom plate, the base is arranged opposite to the pressure head, an inflatable shaft is arranged on the base, the inflatable shaft includes a main shaft body and an air bag arranged in the main shaft body, a lower end of the air bag is provided with a lower end fixing joint, an upper end of the air bag is provided with an upper end fixing joint, the upper end fixing joint extends out of the main shaft body, an air nozzle is provided on the upper end fixing joint, a plurality of vertical opening grooves are provided at intervals in the circumference of the main shaft body, an inflatable slider is slidably arranged at the opening groove, one side of the inflatable slider is located inside the main shaft body, and the other side of the inflatable slider extends out of the main shaft body through the opening groove, and a positioning block for positioning the stator punching sheet is provided on one of the inflatable sliders.

2. A stator core welding device according to claim 1, characterized in that: The inflatable slider includes a limit block and a tightening block, and the limit block and the tightening block are connected by screws. The limit block is located inside the main shaft body, and the limit block has a step surface for abutting against the inner wall of the main shaft body. The tightening block extends out of the main shaft body through an open groove. The positioning block is vertically installed on the tightening block, and the outer surface of the positioning block protrudes from the outer surface of the tightening block.

3. A stator core welding device according to claim 1, characterized in that: The base is provided with a positioning mark for positioning the stator punching sheet.

4. A stator core welding device according to claim 1, characterized in that: The base is also provided with a welding groove matching the welding slot hole of the stator punching sheet.

5. The stator core welding device according to claim 1, characterized in that: A main shaft seal head is arranged at the upper end of the main shaft body, and the upper end fixing joint passes through the main shaft seal head and extends out of the main shaft body, and a fastening nut is threadedly connected to the upper end fixing joint.

6. The stator core welding device according to claim 1, characterized in that: A main shaft seat is arranged at the lower end of the main shaft body, and the main shaft seat is arranged on the base through a cylindrical pin.

7. The stator core welding device according to claim 1, characterized in that: The upper end fixing joint and the lower end fixing joint are respectively arranged at the upper end and the lower end of the airbag through buckles.

8. The stator core welding device according to claim 1, characterized in that: The air nozzle is a pointed air nozzle.

9. The stator core welding device according to claim 1, characterized in that: The main shaft body is provided with four vertical opening grooves spaced apart in the circumferential direction.

10. A stator core welding device according to any one of claims 1 to 6, characterized in that: The device also includes a pressing plate and a pressing tube for pressing the stator punching sheet, and the pressing plate is provided with a guide bar for limiting the position of the pressing tube.

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