Bending device for stator core production

Abstract

The utility model belongs to the technical field of stator iron core production, and particularly relates to a bending device for stator iron core production, which comprises an extrusion table, and a shaping cylinder and an arc-shaped pressing plate which are arranged on the extrusion table at an interval, and two side-by-side chutes are arranged on the extrusion table between the shaping cylinder and the arc-shaped pressing plate. Guide blocks are arranged in the two sliding grooves, plug heads are fixed to the two guide blocks, the two plug heads extend upwards to form the two sliding grooves respectively, the two plug heads are of wedge-shaped structures, the sides, close to the arc-shaped pressing plate, of the two plug heads are arc surfaces, mounting grooves are formed in the arc surfaces of the two plug heads, magnets are fixed to the two mounting grooves, and the magnets are fixed to the two mounting grooves. The sides, close to the corresponding mounting grooves, of the two magnets have radians, and extending parts are fixed to the ends, close to the shaping cylinder, of the two guide blocks. According to the utility model, the silicon steel sheet is limited in the horizontal direction, the silicon steel sheet is centralized from two positions without hindering, and steps generated on the outer circle after the stator core is bent can be reduced conveniently.

Description

Technical Field

[0001] The utility model belongs to the technical field of stator core production, and particularly relates to a bending device for stator core production. Background Art

[0002] The stator core is composed of fan-shaped pieces, ventilation slot pieces, positioning ribs, upper and lower tooth pressure plates, tension bolts and support plates. The stator core is generally punched into fan-shaped pieces with silicon steel sheets and stacked on the positioning ribs. The positioning ribs are welded to the ring plate of the base through the support plate, and the core is compressed into a whole by tension bolts through the upper and lower tooth pressure plates.

[0003] Silicon steel sheets with toothed pressure plates are often placed in a press brake, and the hydraulic system is used to push the curved pressure plate to cooperate with the cylinder for bending. The silicon steel sheet is generally placed vertically on the workbench by a manipulator, and then the cylinders on both sides are started to clamp and straighten the silicon steel sheet so that the silicon steel sheet faces the curved pressure plate.

[0004] When the existing stator core is bent, it is often straightened from both sides by cylinders. After the arc pressure plate approaches the silicon steel sheet, the cylinder needs to be controlled to separate from the silicon steel sheet. In this way, the silicon steel sheet cannot be straightened continuously. The tooling is used to straighten the silicon steel sheet below, forming an obstacle between the silicon steel sheet and the arc pressure plate, causing the blank area to be squeezed, resulting in steps on the outer circle of the stator core after bending. For this reason, we propose a bending device for stator core production. Utility Model Content

[0005] The utility model aims to provide a bending device for stator core production, which can limit the silicon steel sheet in the horizontal direction, and can straighten it from two places without causing any obstruction, so as to reduce the step produced on the outer circle of the stator core after bending.

[0006] The technical solutions adopted in this utility are as follows:

[0007] A bending device for stator core production, comprising an extrusion platform and a shaping cylinder and an arc-shaped pressing plate arranged at intervals from the extrusion platform, wherein two side-by-side slide grooves are provided at a position between the shaping cylinder and the arc-shaped pressing plate on the extrusion platform, guide blocks are arranged inside the two slide grooves, plug heads are fixed to the two guide blocks, two slide grooves are extended upward from the two plug heads respectively, the two plug heads are wedge-shaped and the side close to the arc-shaped pressing plate is an arc surface, when bending, the silicon steel sheet is placed vertically between the shaping cylinder and the arc-shaped pressing plate , the tooth pressure plate on the silicon steel sheet faces the shaping cylinder, and the plug head is covered with two adjacent tooth pressure plates. Then the bending cylinder is started to push the arc pressure plate and the silicon steel sheet close to the shaping cylinder, and the two sides of the arc surface of the plug head respectively contact the roots of the two adjacent tooth pressure plates, and the silicon steel sheet is limited in the horizontal direction. The slide groove, guide block and plug head are used to straighten it from two places. Finally, the shaping cylinder and the arc pressure plate bend the silicon steel sheet, and the plug head is retracted into the gap between the two adjacent tooth pressure plates, which will not cause any obstruction, thereby reducing the step generated on the outer circle of the stator core after bending.

[0008] The arc surfaces of the two plug heads are both provided with installation grooves, and magnets are fixed to the two installation grooves. After the silicon steel sheet falls, the magnets pull the corresponding guide blocks and the plug heads to slide along the slide grooves under the magnetic effect until they are close to the silicon steel sheet. They can be quickly matched without manually closing the guide blocks, the plug heads and the silicon steel sheet so that the guide blocks can fall into place.

[0009] The two magnets have curvatures on one side close to the corresponding mounting grooves. After being attached to the silicon steel sheet, the curvatures leave a deformation margin for the silicon steel sheet so as to absorb the silicon steel sheet over a larger area.

[0010] An extension portion is fixed to one end of the two guide blocks close to the shaping cylinder, which supports the guide blocks in front of being pushed forward to prevent them from tilting in the slide groove.

[0011] Both sides of the two slide grooves are fixed with felt that contacts the guide block and the extension part. Lubricating oil is added to the felt regularly. The felt and the slide groove have the same length, which can provide lubrication for the entire movement of the guide block and reduce friction.

[0012] The arc-shaped pressing plate is fixed with two protrusions which are respectively inserted into the two sliding grooves. As the arc-shaped pressing plate moves, it translates along the corresponding sliding grooves and can be straightened to ensure the horizontal movement of the arc-shaped pressing plate.

[0013] The technical effects achieved by this utility model are:

[0014] The present invention discloses a practical bending device for producing stator cores. When bending, a silicon steel sheet is vertically placed between a shaping cylinder and an arc-shaped pressure plate, the tooth pressure plate on the silicon steel sheet faces the shaping cylinder, two adjacent tooth pressure plates are used to cover a plug head, and then a bending cylinder is started to push the arc-shaped pressure plate and the silicon steel sheet close to the shaping cylinder, and two sides of the arc surface of the plug head respectively contact the roots of two adjacent tooth pressure plates, the silicon steel sheet is limited in a horizontal direction, and a slide groove, a guide block and the plug head are used to straighten the silicon steel sheet from two places. Finally, the shaping cylinder and the arc-shaped pressure plate bend the silicon steel sheet, and the plug head is retracted into the gap between the two adjacent tooth pressure plates, so as not to generate an obstruction, thereby facilitating the reduction of steps generated on the outer circle of the stator core after bending. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of the practical bending device;

[0016] Figure 2 It is a top view of the practical extrusion table;

[0017] Figure 3 It is a side view of the arc-shaped pressing plate of the present invention;

[0018] Figure 4 It is the front view of the guide block of the utility model;

[0019] Figure 5 It is a side view of the plug head of the utility model.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 1. Extrusion table; 2. Forming cylinder; 3. Arc-shaped pressure plate; 4. Slide groove; 5. Guide block; 6. Plug head; 7. Mounting groove; 8. Magnet; 9. Extension part; 10. Linoleum felt; 11. Bump. DETAILED DESCRIPTION

[0022] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with the embodiments. It should be understood that the following text is only used to describe one or several specific implementations of the present invention, and does not strictly limit the scope of protection specifically requested by the present invention.

[0023] like Figure 1-5As shown, a bending device for stator core production includes an extrusion table 1 and a shaping cylinder 2 and an arc-shaped pressing plate 3 spaced apart from the extrusion table 1. The Chinese utility model with reference to the announcement number CN217643090U is a stator core bending device. The extrusion table 1 is fixed with a bending cylinder for moving the arc-shaped pressing plate 3. The output end of the bending cylinder is fixedly connected to the middle of the arc-shaped pressing plate 3. Two side-by-side slide grooves 4 are provided on the extrusion table 1 between the shaping cylinder 2 and the arc-shaped pressing plate 3. Guide blocks 5 are provided inside the two slide grooves 4. The two guide blocks 5 are fixed with plug heads 6. The two plug heads 6 extend upward from two slide grooves 4 respectively. The two plug heads 6 are wedge-shaped and close to one side of the arc-shaped pressing plate 3. They are all arc surfaces, and an industrial six-axis manipulator can be used to pick up and place silicon steel sheets with tooth pressure plates. When bending, the silicon steel sheet is placed vertically between the shaping cylinder 2 and the arc pressure plate 3, and the tooth pressure plate on the silicon steel sheet faces the shaping cylinder 2. Two adjacent tooth pressure plates are used to cover the plug head 6, and then the bending cylinder is started to push the arc pressure plate 3 and the silicon steel sheet close to the shaping cylinder 2, and the two sides of the arc surface of the plug head 6 respectively contact the roots of two adjacent tooth pressure plates, and the silicon steel sheet is limited in the horizontal direction. The slide groove 4, the guide block 5 and the plug head 6 are used to straighten it from two places. Finally, the shaping cylinder 2 and the arc pressure plate 3 bend the silicon steel sheet, and the plug head 6 shrinks into the gap between the two adjacent tooth pressure plates, which will not cause any obstruction, thereby reducing the steps generated on the outer circle of the stator core after bending.

[0024] Among them, the wedge-shaped structure of the plug head 6 can be completely hidden in the gap between the bent tooth pressure plates, and the guide block 5 is always hidden in the slide groove 4, which will not hinder the deformation of the silicon steel sheet.

[0025] like Figure 4 and Figure 5 As shown, the arc surfaces of the two plug heads 6 are provided with mounting grooves 7, and magnets 8 are fixed to the two mounting grooves 7. After the silicon steel sheet falls, the magnets 8 pull the corresponding guide blocks 5 and the plug heads 6 to slide along the slide groove 4 under the magnetic effect until they are close to the silicon steel sheet, and can be quickly matched without manually closing the guide blocks 5, the plug heads 6 and the silicon steel sheet so that the guide blocks 5 can fall into place.

[0026] like Figure 4 and Figure 5 As shown, the two magnets 8 have curvatures on one side close to the corresponding mounting groove 7. After being attached to the silicon steel sheet, the curvatures leave a deformation margin for the silicon steel sheet so as to absorb the silicon steel sheet over a larger area.

[0027] like Figure 2 and Figure 4 As shown, an extension portion 9 is fixed to one end of the two guide blocks 5 close to the shaping cylinder 2 to support the guide blocks 5 in front when they are pushed forward to prevent them from tilting in the slide groove 4.

[0028] like Figure 1 and Figure 4As shown, both sides of the two slide grooves 4 are fixed with felt 10 that contacts the guide block 5 and the extension part 9. Lubricating oil is added to the felt 10 regularly. The felt 10 is the same length as the slide groove 4, which can lubricate the entire movement of the guide block 5 and reduce friction.

[0029] like Figure 1 and Figure 3 As shown, the arc-shaped pressing plate 3 is fixed with two protrusions 11 respectively inserted into the two slide grooves 4. As the arc-shaped pressing plate 3 moves, it translates along the corresponding slide grooves 4 to perform straightening, thereby ensuring that the arc-shaped pressing plate 3 moves horizontally.

[0030] The working principle of the utility model is as follows: when bending, the silicon steel sheet is placed vertically between the shaping cylinder 2 and the arc pressure plate 3, the tooth pressure plate on the silicon steel sheet faces the shaping cylinder 2, and the plug head 6 is covered with two adjacent tooth pressure plates, and then the bending cylinder is started to push the arc pressure plate 3 and the silicon steel sheet close to the shaping cylinder 2, and the two sides of the arc surface of the plug head 6 respectively contact the roots of the two adjacent tooth pressure plates, and the silicon steel sheet is limited in the horizontal direction, and the slide groove 4, the guide block 5 and the plug head 6 are used to straighten it from two places, and finally, the shaping cylinder 2 and the arc pressure plate 3 bend the silicon steel sheet, and the plug head 6 is retracted into the gap between the two adjacent tooth pressure plates, which will not produce an obstructive effect, thereby reducing the step generated on the outer circle of the stator core after bending.

[0031] The above is only a preferred embodiment of the present invention. It should be noted that, for ordinary technicians in the field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A bending device for producing a stator core, comprising an extrusion platform (1), and a shaping cylinder (2) and an arc-shaped pressing plate (3) arranged at intervals on the extrusion platform (1), Features: Two parallel slide grooves (4) are provided on the extrusion platform (1) between the shaping cylinder (2) and the arc-shaped pressure plate (3), and guide blocks (5) are provided inside the two slide grooves (4). The two guide blocks (5) are fixed with plug heads (6), and the two plug heads (6) extend upward from the two slide grooves (4) respectively. The two plug heads (6) are wedge-shaped and have an arc surface on one side close to the arc-shaped pressure plate (3).

2. A bending device for producing a stator core according to claim 1, Features: The arc surfaces of the two plug heads (6) are both provided with mounting grooves (7), and magnets (8) are fixed to the two mounting grooves (7).

3. A bending device for producing a stator core according to claim 2, Features: The two magnets (8) have curved sides close to the corresponding mounting grooves (7).

4. A bending device for producing a stator core according to claim 1, Features: An extension part (9) is fixed to one end of the two guide blocks (5) close to the shaping cylinder (2).

5. A bending device for producing a stator core according to claim 4, Features: Both sides of the two slide grooves (4) are fixed with felt (10) which is in contact with the guide block (5) and the extension part (9).

6. A bending device for producing a stator core according to claim 1, Features: The arc-shaped pressing plate (3) is fixed with two protrusions (11) respectively inserted into the two sliding grooves (4).

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