Universal long-axis rotor core laminating tool and laminating method

Abstract

The invention belongs to the technical field of electric power tools, and particularly relates to a general long-axis rotor iron core laminating tool and a laminating method. The universal long-axis rotor iron core laminating tool comprises a bottom plate, an AS base plate, a bolt, a dummy shaft, a positioning key, a flat pressing ring, a silicon steel sheet, a plum blossom pressing ring, a groove sample rod, a BS base plate, a top plate, a screw rod, a nut, a dummy shaft falling tool, a three-legged base, a shaft, an iron core key and a check ring which are sequentially arranged from bottom to top. Firstly, a dummy shaft circular bottom plate is placed on a horizontal press-fitting platform, and a flat pressing ring, a silicon steel sheet, a plum blossom pressing ring, a BS base plate and a top plate are sequentially inserted into the dummy shaft to be stacked. According to the invention, the utilization rate of the oil press is improved, the safety coefficient in the process of laminating the rotor core is increased, the time of the laminating process is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric tools, and in particular to a universal long-axis rotor core lamination tool and a lamination method. Background Art

[0002] The traditional rotor core of medium and large generators is to stand the shaft drive end vertically on the movable base next to the press machine, and complete the lamination by transferring the silicon steel sheets from a high altitude by climbing a ladder. Through the shaft hole on the silicon steel sheet, the silicon steel sheet is put on the rotor core block from the non-driving end side of the shaft from top to bottom. After the silicon steel sheet is stacked, the pressure ring is placed, and the hydraulic press is used to pressurize it according to the designed pressure, and the retaining ring is placed to make it expand and contract, and enter the retaining ring groove. This lamination method consumes a lot of manpower and time when transferring silicon steel sheets, and the shaft and silicon steel sheets must be in place at the same time for production. There are safety hazards, which seriously occupy the use time of the press and reduce the production efficiency of motor manufacturing. Summary of the invention

[0003] Based on the technical problems raised by the background technology, the present invention proposes a universal long-axis rotor core lamination tooling and lamination method, which solves the potential safety hazards and low press utilization rate problems of the existing high-altitude lamination.

[0004] The present invention proposes a universal long-axis rotor core stacking tooling, comprising a bottom plate, an AS pad, a bolt, a dummy shaft, a positioning key, a flat pressure ring, a silicon steel sheet, a plum blossom pressure ring, a groove sample rod, a BS pad, a top plate, a screw, a nut, a dummy shaft tooling, a tripod base, a shaft, a core key and a retaining ring, which are arranged in sequence from bottom to top. A circle of circular steel plate is welded on the lower surface of the bottom plate, and a plurality of U-shaped shapes with equal distances are opened on the outer circle of the bottom plate. The dummy shaft is welded by a cylindrical shaft, four ribs and a circular plate base. The outer circle of the dummy shaft cooperates with the shaft hole of the silicon steel sheet, and the positioning key and the dummy shaft are installed as a whole. One end of the screw is fastened with a horseshoe nut and welded firmly and flattened, and the other end of the screw is inserted into the top plate, and a nut is screwed on the other end of the screw. The bottom foot of the tripod base supports the core workpiece after heat baking, and the shaft penetrates into the center hole of the circular plate of the tripod base and extends into the pit under the hydraulic press, and a retaining ring is placed on the circular plate of the tripod base.

[0005] Preferably, the bottom plate and the AS pad are respectively cut into semicircles and staggered in a cross shape, and the bottom plate and the AS pad are fastened by bolts.

[0006] Preferably, the keyway width and depth of the dummy shaft are produced according to standards, and the keyway length of the dummy shaft covers the longest main rotor core length of the same series of products.

[0007] Preferably, the outer diameter, inner diameter, thickness and specifications of the U-shaped hole of the top plate are the same as those of the outer diameter, inner diameter, thickness and specifications of the U-shaped hole of the bottom plate.

[0008] Preferably, the inner diameter hole of the AS pad matches the flat pressing ring of the rotor core, the thickness of the AS pad is the same as the thickness of the flat pressing ring, and the outer diameter of the AS pad is the same as the outer diameter of the silicon steel sheet.

[0009] The present invention also proposes a lamination method of a universal long-axis rotor core lamination tool, comprising the following steps:

[0010] Step 1: First place the circular bottom plate of the dummy shaft on the horizontal pressing platform, and then insert the flat pressing ring, silicon steel sheet, plum pressing ring, BS pad, and top plate into the dummy shaft and stack them up. During the stacking process of the silicon steel sheets, the slot sample rods need to be driven into the rotor core slots formed by the stacked silicon steel sheets in a cross-shaped manner;

[0011] Step 2: Place the fastened bottom plate and AS pad horizontally on the movable platform of the hydraulic press, and use a crane to pass the laminated core workpiece through the bottom plate and AS pad and place it on the movable platform of the hydraulic press;

[0012] Step 3: Insert several screws from the outside to the inside into the U-shaped grooves of the bottom plate and the top plate and fix them with double nuts without tightening them to ensure that the screws are vertical;

[0013] Step 4: Place the press cylinder on the top of the workpiece, push it into the press-fit position of the hydraulic press, pressurize it according to the designed pressure, and tighten the screw and nut;

[0014] Step 5: Push out the workpiece, press out the dummy shaft, and use a crane to turn the workpiece over so that its AS end faces upwards;

[0015] Step 6: Place the workpiece into the oven. When the oven temperature reaches °C, keep it warm for hours.

[0016] Step 7: Pass the core through the shaft, and use a copper rod to drive the core key into the keyway of the machined shaft in advance, so that it fits tightly against the shaft and is in place;

[0017] Step 8: Place the expanded retaining ring on the tripod base in advance, then place the hot-baked iron core workpiece on the tripod base, insert the shaft BS end downward into the iron core, and send it into the press;

[0018] Step 9: Pressurize according to the designed pressure, release the pressure, install the retaining ring, remove the screw, push out the trolley, exit the press, and remove the tooling.

[0019] The beneficial effects of the present invention are:

[0020] The present invention improves the utilization rate of the oil press, increases the safety factor in the process of laminating rotor cores, reduces the time of the laminating process, and improves the production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the present invention;

[0022] Figure 2 It is a diagram showing the matching relationship between the base plate of the present invention and the AS pad;

[0023] Figure 3 It is a schematic diagram of the structure of the laminated rotor silicon steel sheet driven into the slot sample rod of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the false shaft tooling of the present invention;

[0025] Figure 5 It is a schematic diagram of the tripod base structure of the present invention;

[0026] Figure 6 It is a schematic diagram of the shaft-in rotor structure of the present invention.

[0027] In the figure: 1. bottom plate; 2. AS pad; 3. bolt; 4. dummy shaft; 5. positioning key; 6. flat pressure ring; 7. silicon steel sheet; 8. plum blossom pressure ring; 9. groove sample rod; 10. BS pad; 11. top plate; 12. screw; 13. nut; 14. dummy shaft drop tooling; 15. tripod base; 16. shaft; 17. core key; 18. retaining ring. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0029] Reference Figure 1-6A universal long-axis rotor core lamination tooling, from bottom to top, is a bottom plate 1, an AS pad 2, a bolt 3, a dummy shaft 4, a positioning key 5, a flat pressure ring 6, a silicon steel sheet 7, a plum blossom pressure ring 8, a groove sample rod 9, a BS pad 10, a top plate 11, a screw 12, a nut 13, a dummy shaft drop tooling 14, a tripod base 15, a shaft 16, a core key 17, and a retaining ring 18. The bottom plate 1 and the AS pad 2 are both annular, the inner diameter hole of the AS pad 2 matches the rotor core flat pressure ring 6, the thickness of the AS pad 2 is the same as the thickness of the flat pressure ring 6, the outer diameter of the AS pad 2 is the same as the outer diameter of the silicon steel sheet 7, the upper surface of the bottom plate 1 has a stop with a depth of 2-5mm and the outer diameter of the AS pad 2 matches The diameter of the inner diameter circular hole of the bottom plate 1 needs to consider the size of the base of the fake shaft 4 and the diameter of the left shoulder of the core block of the shaft 15 so that it can pass smoothly. A circle of circular steel plates are welded on the lower surface of the bottom plate 1. These circular steel plates have two functions. One is to support the bottom plate 1 so that the subsequent horseshoe-shaped screw 12 is easy to install and disassemble. The second is that these protruding circular steel plates fit the inner diameter of the cylinder of the fake shaft fixture 14 to make the process of pressing out the fake shaft 4 safer and more reliable. The bottom plate 1 opens a number of U-shaped holes evenly distributed on the outer circle. The U-shaped hole cooperates with the horseshoe nut fixed at one end of the screw 12. The U-shaped hole opens a certain depth of stop according to the size of the horseshoe nut to position the horseshoe nut of the screw 12. The bottom plate 1 and The AS pad 2 needs to be fastened into one piece with bolts 3 before the rotor is stacked. The dummy shaft 4 is welded by a cylindrical shaft, 4 ribs and a round plate base. After welding, the outer circle of the rib matches the shaft hole of the silicon steel sheet 7. The keyway width and depth of the dummy shaft 4 are produced according to the standard. The keyway length of the dummy shaft can cover the longest main rotor core length of the same series of products. The positioning key 5 is installed in conjunction with the dummy shaft 4 as a whole. The BS pad 10 and the top plate 11 are both annular. The inner diameter hole of the BS pad 10 matches the rotor core plum blossom pressure ring 8. The thickness of the BS pad 10 is the same as the thickness of the plum blossom pressure ring 8. The outer diameter of the BS pad 10 is the same as the outer diameter of the silicon steel sheet 7. The outer diameter, inner diameter, thickness, and U of the top plate 11 and the bottom plate 1 The holes are the same. One end of the screw rod 12 is fastened with a horseshoe nut and welded firmly and flattened. The other end has a certain depth of thread. After the iron core is pressed, it is fastened with a double nut 13. The groove sample rod 9 is made into a plate of a certain length according to the groove shape. Generally, at least 4 pieces are required. The groove sample rod 9 plays a role in positioning the silicon steel sheets 7 when the silicon steel sheets 7 are stacked. The groove sample rod 9 plays a role in fixing the silicon steel sheets when the rotor workpiece rotates and is hot-dried. The bottom foot of the tripod base 15 supports the iron core workpiece after hot baking. The center hole of the circular plate of the tripod base allows the shaft to penetrate and extend into the pit under the hydraulic press. A pre-opened retaining ring 18 is placed on the circular plate of the tripod base to facilitate the installation of the retaining ring 18 after the shaft 16 is pressed in.

[0030] A method for laminating and forming a large long-axis rotor core comprises the following steps:

[0031] The first step is to place the circular bottom plate of the dummy shaft 4 on the horizontal pressing platform, and then insert the flat pressing ring 6, silicon steel sheet 7, plum blossom pressing ring 8, BS pad 10, and top plate 11 into the dummy shaft 4 and stack them up. During the stacking process of the silicon steel sheet 7, the slot sample rod 9 needs to be driven into the rotor core slot formed by the stacked silicon steel sheets 7 in a cross-shaped manner;

[0032] Step 2: Place the fastened bottom plate 1 and AS pad 2 horizontally on the movable platform of the hydraulic press, and use a crane to pass the laminated core workpiece through the bottom plate 1 and AS pad 2 and place them on the movable platform of the hydraulic press;

[0033] Step 3: Insert a plurality of screws 12 from outside to inside into the U-shaped grooves of the bottom plate 1 and the top plate 11 and fix them with double nuts 13 without tightening them to ensure that the screws 12 are vertical;

[0034] Step 4: Place the press cylinder on the top of the workpiece, push it into the press-fitting position of the hydraulic press, pressurize it according to the designed pressure, and tighten the screw 12 and the nut 13;

[0035] Step 5: Push out the workpiece, press out the dummy shaft 4, and use a crane to turn the workpiece over so that its AS end faces upwards;

[0036] Step 6: Place the workpiece into the oven. After the oven temperature reaches 180°, keep it warm for 2 hours.

[0037] Step 7: Pass the core through the shaft 16, and use a copper rod to drive the core key 17 into the keyway of the processed shaft 16 in advance, so that it can be tightly installed with the shaft 16;

[0038] Step 8: Place the expanded retaining ring 18 on the tripod base 15 in advance, then place the hot-baked iron core workpiece on the tripod base 15, insert the shaft 16BS end downward into the iron core, and send it into the press;

[0039] Step 9. Pressurize according to the designed pressure, release the pressure, install the retaining ring 18, remove the screw 12, push out the trolley, exit the press, and remove the tooling.

[0040] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A universal long-axis rotor core lamination tooling, comprising a bottom plate (1), an AS pad (2), a bolt (3), a dummy shaft (4), a positioning key (5), a flat pressure ring (6), a silicon steel sheet (7), a plum blossom pressure ring (8), a groove sample rod (9), a BS pad (10), a top plate (11), a screw (12), a nut (13), a dummy shaft drop tooling (14), a tripod base (15), a shaft (16), a core key (17) and a retaining ring (18) arranged in sequence from bottom to top, characterized in that: A circle of circular steel plate is welded on the lower surface of the bottom plate (1), and a plurality of U-shaped parts are opened on the outer circle of the bottom plate (1) at equal distances. The dummy shaft (4) is welded by a cylindrical shaft, four ribs and a circular plate base. The outer circle of the dummy shaft (4) matches the shaft hole of the silicon steel sheet (7), and the positioning key (5) and the dummy shaft (4) are matched and installed as a whole. One end of the screw rod (12) is fastened with a horseshoe nut and welded firmly and flattened. The other end of the screw rod (12) is inserted into the top plate (11), and the other end of the screw rod (12) is screwed with a nut (13). The bottom foot of the tripod base (15) supports the hot-baked iron core workpiece, and the shaft (16) penetrates into the circular plate center hole of the tripod base (15) and extends into the pit below the hydraulic press. A retaining ring (18) is placed on the circular plate of the tripod base (15).

2. The universal long-axis rotor core lamination tooling according to claim 1, characterized in that: The bottom plate (1) and the AS pad (2) are respectively cut into semicircles and staggered in a cross shape, and the bottom plate (1) and the AS pad (2) are fastened by bolts (3).

3. The universal long-axis rotor core lamination tooling according to claim 1, characterized in that: The keyway width and depth of the dummy shaft (4) are produced according to standards, and the keyway length of the dummy shaft (4) covers the longest main rotor core length of the same series of products.

4. The universal long-axis rotor core lamination tooling according to claim 1, characterized in that: The specifications of the outer diameter, inner diameter, thickness and U-shaped hole of the top plate (11) are the same as those of the outer diameter, inner diameter, thickness and U-shaped hole of the bottom plate (1).

5. The universal long-axis rotor core lamination tooling according to claim 1, characterized in that: The inner diameter hole of the AS pad (2) matches the rotor core flat pressing ring (6), the thickness of the AS pad (2) is the same as the thickness of the flat pressing ring (6), and the outer diameter of the AS pad (6) is the same as the outer diameter of the silicon steel sheet (7).

6. The lamination method of a universal long-axis rotor core lamination tooling according to claim 1, characterized in that: The following steps are involved: Step 1: first place the circular bottom plate of the dummy shaft (4) on a horizontal pressing platform, and sequentially insert the flat pressing ring (6), silicon steel sheet (7), plum blossom pressing ring (8), BS pad (10), and top plate (11) into the dummy shaft (4) and stack them. During the stacking process of the silicon steel sheet (7), the slot sample rod (9) needs to be driven into the rotor core slot formed by the stacked silicon steel sheets (7) in a cross-shaped manner; Step 2: Place the fastened bottom plate (1) and AS pad (2) horizontally on the movable platform of the hydraulic press, and use a crane to place the laminated iron core workpiece through the bottom plate (1) and AS pad (2) on the movable platform of the hydraulic press; Step 3: Insert a plurality of screw rods (12) from the outside to the inside into the U-shaped grooves of the bottom plate (1) and the top plate (11) and fix them with double nuts (13) without tightening them to ensure that the screw rods (12) are vertical; Step 4: Place the press cylinder on the top of the workpiece, push it into the press-fitting position of the hydraulic press, pressurize it according to the designed pressure, and tighten the screw (12) and the nut (13); Step 5: Push out the workpiece, press out the dummy shaft (4), and use a crane to turn the workpiece over so that its AS end faces upwards; Step 6: Place the workpiece into the oven, and keep it warm for 2 hours after the oven temperature reaches 180°; Step 7: The core is passed through the shaft (16), and the core key (17) is driven into the keyway of the processed shaft (16) with a copper rod in advance, so that it is tightly installed with the shaft (16); Step 8: Place the expanded retaining ring (18) on the tripod base (15) in advance, then place the hot-baked iron core workpiece on the tripod base (15), insert the shaft (16) BS end downward into the iron core, and send it into the press; Step 9: Pressurize according to the designed pressure, release the pressure, install the retaining ring (18), remove the screw (12), push out the trolley, exit the press, and remove the tooling.

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