Clamping device for machining outer circle of motor steel jacket

Abstract

The utility model discloses a motor steel jacket excircle machining clamping device which comprises a base and an expansion sleeve, an upper cone and a lower cone which are opposite up and down are arranged on the base, and the small-diameter end of the upper cone is opposite to the small-diameter end of the lower cone; the expansion sleeve is sleeved between the upper cone and the lower cone, and the two ends of the expansion sleeve are respectively provided with a pressed conical surface; when the expansion sleeve is sleeved with the motor steel sleeve, the upper cone and the lower cone can be close to each other and extrude the pressed conical surfaces at the two ends of the expansion sleeve, so that the expansion sleeve expands the inner hole of the motor steel sleeve. A pulling mechanism is arranged on the base, the lower cone is fixed to the base, the upper cone is connected with the movable end of the pulling mechanism, and the pulling mechanism can pull the upper cone to move downwards to be close to the lower cone. The pulling mechanism comprises a telescopic oil cylinder, the telescopic oil cylinder is installed on the lower cone, a pull rod is connected to the telescopic oil cylinder, and the upper end of the pull rod is connected with the upper cone. The tool can prevent deformation of the outer circle of the motor steel sleeve in machining and rebound after machining.

Description

Technical Field

[0001] This utility model relates to the field of motor steel sleeve processing, and in particular to a clamping device for processing the outer circle of motor steel sleeve. Background Technology

[0002] In machining, CNC lathes are often used for machining the outer diameter of thin-walled workpieces. For internal hole positioning, a large-proportion tapered shaft or a one-way expansion sleeve is used as the positioning element. During positioning, the inner cylindrical surface and the positioning element do not have surface contact, but rather line contact. While the contact area provides sufficient rigidity and machining stability, the workpiece in the machining area far from the contact point is subjected to cutting forces, resulting in inward compression. When the cutting force is removed, the workpiece springs back, affecting the product's machining quality. New energy vehicle motor steel sleeves are thin-walled steel plate forming parts. To address these issues, a machining fixture for the outer diameter of motor steel sleeves was designed. Summary of the Invention

[0003] Purpose of the invention: In order to overcome the shortcomings of the existing technology, this utility model provides a clamping device for machining the outer circle of motor steel sleeve, which prevents deformation during machining of the outer circle of motor steel sleeve and springback after machining.

[0004] Technical solution: To achieve the above objectives, this utility model provides a clamping device for machining the outer diameter of a motor steel sleeve, comprising a base and an expansion sleeve. The base has an upper cone and a lower cone that are opposite each other, with the small diameter ends of the upper cone and the lower cone facing each other. The expansion sleeve is fitted between the upper cone and the lower cone, and each end of the expansion sleeve is provided with a pressure-bearing cone surface. When the motor steel sleeve is fitted outside the expansion sleeve, the upper cone and the lower cone can approach each other and press against the pressure-bearing cone surfaces at both ends of the expansion sleeve, thereby tightening the inner hole of the motor steel sleeve.

[0005] Furthermore, the base is provided with a pulling mechanism, the lower cone is fixed on the base, and the upper cone is connected to the movable end of the pulling mechanism. The pulling mechanism can pull the upper cone down to be close to the lower cone.

[0006] Furthermore, the pulling mechanism includes a telescopic hydraulic cylinder, which is mounted on the lower cone and connected to a pull rod, the upper end of which is connected to the upper cone.

[0007] Furthermore, a through hole is provided on the upper cone, the upper end of the pull rod passes through the through hole, and a limit nut is provided at the upper end of the pull rod; a compression spring is also provided between the upper cone and the telescopic cylinder.

[0008] Furthermore, the upper end of the lower cone is provided with a guide groove, and the lower end of the lower cone is provided with a guide ring; the guide ring is correspondingly slidably inserted into the guide groove, so that the upper cone and the lower cone slide and cooperate; an installation cavity is formed between the guide ring and the guide groove, and the telescopic cylinder is correspondingly installed in the installation cavity.

[0009] Furthermore, one end of the motor steel sleeve is provided with an annular edge, and the base is provided with a plurality of pressing mechanisms; when the motor steel sleeve is fitted outside the expansion sleeve, the pressing mechanism can press the annular edge of the motor steel sleeve onto the base.

[0010] Furthermore, the base is provided with several support blocks. When the motor steel sleeve is fitted outside the expansion sleeve, the annular edge is placed on the support block. The pressing mechanism includes a rotary cylinder. The movable end of the rotary cylinder is connected to a pressure plate. The rotary cylinder can drive the pressure plate to rotate above the support block to press the annular edge on the support block.

[0011] Beneficial effects: The clamping device for machining the outer diameter of a motor steel sleeve according to this utility model has the following advantages: Before the machining process of the motor steel sleeve, the upper cone is in a relaxed state under the action of the compression spring, and the expansion sleeve is in the minimum diameter position, which facilitates the loading of the motor steel sleeve; after loading is completed, the telescopic cylinder supplies oil, pulls the pull rod down to overcome the spring force, drives the upper cone to move down and squeeze the expansion sleeve, so that the diameter of the expansion sleeve increases until the inner hole of the motor steel sleeve is tightened, thereby ensuring that the motor steel sleeve has sufficient rigidity when machining the outer diameter, and is not prone to deformation during machining or springback after machining. Attached Figure Description

[0012] Appendix Figure 1 This is a schematic diagram of the clamping device of this utility model. Detailed Implementation

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] As attached Figure 1 The aforementioned clamping device for machining the outer diameter of a motor steel sleeve includes a base 2 and an expansion sleeve 12. One side of the base 2 is connected to a connecting plate 1 by screws, and the connecting plate 1 is connected to the spindle of a CNC machine tool. The other side of the base 2 is provided with an upper cone 11 and a lower cone 7 that are opposite each other, with the small diameter end of the upper cone 11 opposite to the small diameter end of the lower cone 7.

[0015] An expansion sleeve 12 is fitted between the upper cone 11 and the lower cone 7. Each end of the expansion sleeve 12 has a pressure-bearing conical surface 13, the shape of which is adapted to the conical surface shape of the upper cone 11 and the lower cone 7, respectively. When the motor steel sleeve 6 is fitted over the expansion sleeve 12, the upper cone 11 and the lower cone 7 can approach each other, causing them to press against the pressure-bearing conical surfaces 13 at both ends of the expansion sleeve 12. This causes a change in the diameter of the expansion sleeve 12 until it tightens the inner hole of the motor steel sleeve 6, thereby enhancing the machining rigidity of the motor steel sleeve 6 and preventing deformation during outer diameter machining and springback after machining.

[0016] A pulling mechanism is provided on the base 2. The lower cone 7 is fixed on the base 2, and the upper cone 11 is connected to the movable end of the pulling mechanism. The pulling mechanism can pull the upper cone 11 down to be close to the lower cone 7, so that the upper cone 11 and the lower cone 7 cooperate to compress the pressure cone surfaces 13 at both ends of the motor steel sleeve 6.

[0017] The pulling mechanism includes a telescopic cylinder 8, which is mounted on the lower cone 7. A pull rod 10 is connected to the telescopic cylinder 8, and the upper end of the pull rod 10 is connected to the upper cone 11. When the telescopic cylinder 8 extends or retracts, it drives the pull rod 10 to move, thereby causing the upper cone 11 to move closer to or away from the lower cone 7.

[0018] As attached Figure 1 As shown, the upper cone 11 has a through hole, through which the upper end of the pull rod 10 passes, and a limit nut is provided at the upper end of the pull rod 10. A compression spring 9 is also provided between the upper cone 11 and the telescopic cylinder 8. When the telescopic cylinder 8 stops supplying oil, the elastic force of the compression spring 9 can drive the upper cone 11 to separate from the lower cone 7.

[0019] The upper end of the lower cone 7 is provided with a guide groove, and the lower end of the lower cone 7 is provided with a guide ring. The outer circumference of the guide ring corresponds to the inner wall shape of the guide groove, and the guide ring slides into the guide groove, so that the upper cone 11 and the lower cone 7 slide and cooperate, thereby guiding the upper cone 11 when it moves. A mounting cavity is also formed between the guide ring and the guide groove, and the telescopic cylinder 8 is correspondingly installed in the mounting cavity.

[0020] One end of the motor steel sleeve 6 is provided with an annular edge, and the base 2 is provided with several pressing mechanisms; when the motor steel sleeve 6 is sleeved outside the expansion sleeve 12, the pressing mechanism can press the annular edge of the motor steel sleeve 6 onto the base 2, thereby more stably fixing the motor steel sleeve 6.

[0021] Specifically, a cylinder seat 3 is installed on each side of the base 2, and a support block 5 is provided on the cylinder seat 3. When the motor steel sleeve 6 is fitted outside the expansion sleeve 12, the annular edge is placed on the support block 5. The clamping mechanism includes a rotary cylinder 4 installed in the hole of the cylinder seat 3. The movable end of the rotary cylinder 4 is connected to a pressure plate. The rotary cylinder 4 can drive the pressure plate to rotate above the support block 5 to press down the annular edge on the support block 5.

[0022] The working principle of this utility model is as follows: Before the motor steel sleeve 6 is processed, the upper cone 11 is in a loose state under the action of the compression spring 9, and the expansion sleeve 12 is in the minimum diameter position, which facilitates the loading of the motor steel sleeve 6. After loading, the base 2 is supplied with oil through the centralized oil supply system at the rear end of the CNC machine tool spindle. The oil is distributed through the built-in oil circuit of the base 2 to supply oil to the telescopic cylinder 8. The pull rod 10 is pulled down to overcome the spring force of the compression spring 9, and the upper cone 11 is moved down. The pressure cone surfaces 13 at both ends of the expansion sleeve 12 are squeezed by the upper cone 11 and the lower cone 7 respectively, thereby increasing the diameter of the expansion sleeve 12 until the inner hole of the motor steel sleeve 6 is tightened, and the positioning is completed. The tensioning force of the telescopic cylinder 8 is controlled by pressure to offset the cutting force and ensure that the motor steel sleeve 6 has sufficient rigidity when the outer circle is processed. After positioning, the rotating cylinders 4 on the left and right sides are supplied with oil. The rotating cylinders 4 press the annular edge of the motor steel sleeve 6 and make it stick to the support block 5 to achieve clamping, thereby ensuring the processing accuracy of the motor steel sleeve 6.

[0023] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A clamping device for machining the outer diameter of a motor steel sleeve, characterized in that: Includes a base (2) and an expansion sleeve (12). The base (2) has an upper cone (11) and a lower cone (7) that are opposite to each other. The small diameter end of the upper cone (11) is opposite to the small diameter end of the lower cone (7). The expansion sleeve (12) is fitted between the upper cone (11) and the lower cone (7). The two ends of the expansion sleeve (12) are respectively provided with pressure cone surfaces (13). When the motor steel sleeve (6) is fitted outside the expansion sleeve (12), the upper cone (11) and the lower cone (7) can approach each other and squeeze the pressure cone surfaces (13) at both ends of the expansion sleeve (12), so that the expansion sleeve (12) tightens the inner hole of the motor steel sleeve (6).

2. The clamping device for machining the outer diameter of a motor steel sleeve according to claim 1, characterized in that: The base (2) is provided with a pulling mechanism. The lower cone (7) is fixed on the base (2). The upper cone (11) is connected to the movable end of the pulling mechanism. The pulling mechanism can pull the upper cone (11) down to be close to the lower cone (7).

3. The clamping device for machining the outer diameter of a motor steel sleeve according to claim 2, characterized in that: The pulling mechanism includes a telescopic cylinder (8), which is mounted on the lower cone (7). A pull rod (10) is connected to the telescopic cylinder (8), and the upper end of the pull rod (10) is connected to the upper cone (11).

4. The clamping device for machining the outer diameter of a motor steel sleeve according to claim 3, characterized in that: The upper cone (11) has a through hole, the upper end of the pull rod (10) passes through the through hole, and the upper end of the pull rod (10) is provided with a limit nut; a compression spring (9) is also provided between the upper cone (11) and the telescopic cylinder (8).

5. The clamping device for machining the outer diameter of a motor steel sleeve according to claim 3, characterized in that: The upper end of the lower cone (7) is provided with a guide groove, and the lower end of the lower cone (7) is provided with a guide ring; the guide ring is slidably inserted into the guide groove so that the upper cone (11) and the lower cone (7) slide and cooperate; an installation cavity is formed between the guide ring and the guide groove, and the telescopic cylinder (8) is correspondingly installed in the installation cavity.

6. The clamping device for machining the outer diameter of a motor steel sleeve according to claim 1, characterized in that: One end of the motor steel sleeve (6) is provided with an annular edge, and the base (2) is provided with several pressing mechanisms; when the motor steel sleeve (6) is sleeved outside the expansion sleeve (12), the pressing mechanism can press the annular edge of the motor steel sleeve (6) onto the base (2).

7. The clamping device for machining the outer diameter of a motor steel sleeve according to claim 6, characterized in that: The base (2) is provided with several support blocks (5). When the motor steel sleeve (6) is sleeved outside the expansion sleeve (12), the annular edge is placed on the support block (5). The pressing mechanism includes a rotary cylinder (4). The movable end of the rotary cylinder (4) is connected to a pressure plate. The rotary cylinder (4) can drive the pressure plate to rotate above the support block (5) to press the annular edge on the support block (5).

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