Special-shaped copper contact milling tooling

Abstract

The utility model relates to a kind of special-shaped copper contact milling tool, belong to low-voltage electrical apparatus processing technical field, including bottom plate, the bottom plate is equipped with several special-shaped copper contacts located at the front end of bottom plate, the rear end of special-shaped copper contact is equipped with with bottom plate and is inserted into the positioning block of bottom plate, the rear end of bottom plate is equipped with the pressure plate for the crimping limit of special-shaped copper contact, the front end of special-shaped copper contact is equipped with with bottom plate and is inserted into the floating rod of bottom plate, the lower part of bottom plate is equipped with with floating rod and is threadedly connected self-locking nut.With compact structure, easy operation and good effect characteristics.Solve the accurate positioning, reliable clamping and prevent deformation problem of special-shaped, small, easily deformed copper parts during processing.

Description

Technical Field

[0001] This utility model relates to the field of low-voltage electrical appliance processing technology, specifically to a milling fixture for irregularly shaped copper contacts. Background Technology

[0002] Irregularly shaped copper contacts are core conductive components in electrical equipment such as high-voltage circuit breakers, contactors, and switchgear. Their processing quality directly affects the conductivity, safety, and lifespan of the equipment. Irregularly shaped copper contacts generally have complex structures and require high-precision processing. For example, the stationary contacts of low-voltage molded case circuit breakers have symmetry requirements for the holes on both sides and the stepped surfaces.

[0003] The original machining center used flat-jaw pliers to clamp the rear face of irregularly shaped copper contacts, machining each face individually before drilling. This not only resulted in large errors in the overall width but also caused significant deviations in the symmetry of the two sides and the stepped surfaces relative to the holes, leading to low work efficiency. The shortcomings of the existing technology are as follows: Positioning and clamping challenges: Irregularly shaped parts cannot be stably positioned by traditional vises, clamping plates, and other general-purpose fixtures, and are prone to displacement or vibration due to cutting forces during processing.

[0004] Deformation is a prominent issue: copper parts have a large coefficient of thermal expansion and low hardness. During machining, cutting heat and clamping force can easily cause workpiece deformation, affecting dimensional accuracy and geometric tolerances.

[0005] Efficiency versus precision is contradictory: to prevent deformation, small cutting amounts and multiple clamping operations are often used, resulting in long machining cycles; however, pursuing efficiency can easily sacrifice precision. Summary of the Invention

[0006] This invention addresses the shortcomings of existing technologies by providing a milling fixture for irregularly shaped copper contacts. This fixture is characterized by its compact structure, convenient operation, and high efficiency. It solves the problems of precise positioning, reliable clamping, and deformation prevention during the machining of irregularly shaped, small, and easily deformable copper parts.

[0007] The above-mentioned technical problems of this utility model are mainly solved by the following technical solutions: A milling fixture for irregularly shaped copper contacts includes a base plate. Several irregularly shaped copper contacts are provided on the base plate at its front end. A positioning block is provided between the rear end of the irregularly shaped copper contacts and the base plate, and the rear end of the base plate is provided with a pressure plate for pressing and limiting the irregularly shaped copper contacts. A floating rod is provided between the front end of the irregularly shaped copper contacts and the base plate, and a self-locking nut is provided at the lower part of the base plate that is threadedly connected to the floating rod.

[0008] Preferably, the pressure plate is provided with a top rod that is threadedly connected to the bottom plate at its rear end, the pressure plate is provided with an oval hole in the middle, and the top rod and the positioning block are provided with a screw that passes through the oval hole and is threadedly connected to the bottom plate.

[0009] Preferably, the upper end of the pressure plate and the bottom plate are provided with locking nuts that are threadedly connected to the screw, and the bottom plate is provided with locking nuts that are threadedly connected to the top rod.

[0010] Preferably, a spring washer that engages with the screw is provided between the locking nut and the pressure plate.

[0011] Preferably, the base plate is provided with a spring that is sleeved with the floating rod.

[0012] Preferably, the irregularly shaped copper contact is provided with a positioning pin that is inserted into the positioning block.

[0013] Preferably, both sides of the front end of the base plate are provided with locking screws that are threadedly connected to the base plate and press against the floating rod.

[0014] This invention can achieve the following effects: This invention provides a milling fixture for irregularly shaped copper contacts, which, compared with existing technologies, features a compact structure, convenient operation, and good performance. It solves the problems of precise positioning, reliable clamping, and deformation prevention during the machining of irregularly shaped, small, and easily deformable copper parts.

[0015] High precision and high repeatability: The combination of positioning blocks and positioning pins enables precise positioning of the workpiece, making it suitable for mass production.

[0016] Effectively prevents deformation: The floating support mechanism provides a transition from flexibility to rigidity, avoiding pre-stress deformation during clamping while ensuring rigid support during processing, making it particularly suitable for soft materials such as copper.

[0017] Reliable clamping and good anti-loosening performance: It adopts multiple anti-loosening designs such as lever clamping, double locking nuts, and spring washers to ensure the stability of the workpiece in the milling vibration environment.

[0018] Good adaptability: The design of the oval hole and floating rod makes the tooling insensitive to the small tolerances of the workpiece size, reducing the accuracy requirements for tooling manufacturing and workpiece incoming materials.

[0019] Compact structure and easy operation: The entire tooling is integrated on the base plate, with a clear structure and reasonable positions of each adjustment component (top rod, screw, nut), which facilitates quick operation by workers. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a structural cross-sectional view of the present invention.

[0022] In the diagram: 1. Base plate; 2. Irregular copper contact; 3. Positioning block; 4. Locking screw; 5. Pressure plate; 6. Screw; 7. Locking nut; 8. Oval hole; 9. Self-locking nut; 10. Spring; 11. Floating rod; 12. Positioning pin; 13. Spring washer; 14. Top rod. Detailed Implementation

[0023] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0024] Example: Figure 1 and Figure 2 As shown, a milling fixture for irregularly shaped copper contacts includes a base plate 1. Two irregularly shaped copper contacts 2 are symmetrically distributed at the front end of the base plate 1. A positioning block 3, which inserts into the base plate 1, is located between the rear end of each irregularly shaped copper contact 2 and the base plate 1. A positioning pin 12, which inserts into the positioning block 3, is located on each irregularly shaped copper contact 2. A pressure plate 5, used for pressing and limiting the irregularly shaped copper contacts 2, is located at the rear end of the base plate 1. A push rod 14, threadedly connected to the base plate 1, is located between the rear end of the pressure plate 5 and the base plate 1. An oblong hole 8 is located in the middle of the pressure plate 5. A screw 6, which passes through the oblong hole 8 and is threadedly connected to the base plate 1, is located between the push rod 14 and the positioning block 3. Locking nuts 7, threadedly connected to the screw 6, are located on the upper end of the pressure plate 5 and on the base plate 1. Locking nuts 7, threadedly connected to the push rod 14, are also located on the base plate 1. A spring washer 13, which engages with the screw 6, is provided between the locking nut 7 and the pressure plate 5. A floating rod 11, which is inserted into the base plate 1, is provided between the front end of the irregular copper contact 2 and the base plate 1. Locking screws 4, which are threadedly connected to the base plate 1 and press against the floating rod 11, are provided on both sides of the front end of the base plate 1. A spring 10, which engages with the floating rod 11, is provided inside the base plate 1. A self-locking nut 9, which is threadedly connected to the floating rod 11, is provided at the bottom of the base plate 1.

[0025] Working process: Place the irregular copper contact milling fixture on the milling machine worktable, fix the base plate 1 with a pressure plate or flat-jaw pliers, drag the pressure plate 5 down, fit the pre-drilled irregular copper contact 2 into the positioning pin 12, with the front end face tightly against the floating rod 11, push the pressure plate 5 up, tighten the locking nut 7, press the irregular copper contact 2 tightly, and then lock the floating rod 11 with the left and right locking screws 4 to fix it in the up and down direction. In this way, the two sides and the stepped surface of the irregular copper contact 2 can be milled, and the width, stepped surface size and symmetry with the hole of the irregular copper contact 2 can be guaranteed by the scale (or digital display) of the machine tool.

[0026] In summary, this milling fixture for irregularly shaped copper contacts features a compact structure, convenient operation, and excellent performance. It solves the problems of precise positioning, reliable clamping, and deformation prevention during the machining of irregularly shaped, small, and easily deformable copper parts.

[0027] It will be apparent to those skilled in the art that this invention is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0028] In summary, the above description is only a specific embodiment of the present utility model, but the structural features of the present utility model are not limited thereto. Any changes or modifications made by those skilled in the art within the scope of the present utility model are covered by the patent scope of the present utility model.

Claims

1. A milling fixture for irregularly shaped copper contacts, characterized in that: Includes a base plate (1), on which are provided a plurality of irregular copper contacts (2) located at the front end of the base plate (1), and a positioning block (3) inserted into the base plate (1) between the rear end of the irregular copper contacts (2) and the base plate (1), and a pressure plate (5) for pressing and limiting the irregular copper contacts (2) at the rear end of the base plate (1), and a floating rod (11) inserted into the base plate (1) between the front end of the irregular copper contacts (2) and the base plate (1), and a self-locking nut (9) threadedly connected to the floating rod (11) at the lower part of the base plate (1).

2. The milling fixture for irregularly shaped copper contacts according to claim 1, characterized in that: The pressure plate (5) is provided with a top rod (14) that is threadedly connected to the bottom plate (1) between the rear end of the pressure plate (5) and the bottom plate (1). The pressure plate (5) is provided with an oval hole (8) in the middle. The top rod (14) and the positioning block (3) are provided with a screw (6) that passes through the oval hole (8) and is threadedly connected to the bottom plate (1).

3. The milling fixture for irregularly shaped copper contacts according to claim 2, characterized in that: The upper end of the pressure plate (5) and the bottom plate (1) are provided with locking nuts (7) that are threadedly connected to the screw (6), and the bottom plate (1) is provided with locking nuts (7) that are threadedly connected to the top rod (14).

4. The milling fixture for irregularly shaped copper contacts according to claim 3, characterized in that: A spring washer (13) that is connected to the screw (6) is provided between the locking nut (7) and the pressure plate (5).

5. The milling fixture for irregularly shaped copper contacts according to claim 1, characterized in that: The base plate (1) is provided with a spring (10) that is connected to the floating rod (11).

6. The milling fixture for irregularly shaped copper contacts according to claim 1, characterized in that: The irregular copper contact (2) is provided with a positioning pin (12) that is inserted into the positioning block (3).

7. The milling fixture for irregularly shaped copper contacts according to claim 1, characterized in that: The base plate (1) is provided with locking screws (4) on both sides of the front end, which are threadedly connected to the base plate (1) and pressed against the floating rod (11).

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