Tooling fixture for processing high-voltage switch explosion-proof outlet box

Abstract

The utility model provides a tool fixture for processing high pressure switch explosion -proof outlet box, relate to fixture technical field, including base and workpiece positioning subassembly, the upside of base is provided with arc concave surface, the axis of arc concave surface is horizontal, the side of base is provided with first stopper, first stopper has first stop face, first stop face is perpendicular to the axis of arc concave surface, workpiece positioning subassembly can be detachably fixed on base, workpiece adjustable horizontal distance between base, workpiece positioning subassembly includes locating piece, is provided with a plurality of keyway positioning hole on locating piece, first stop face is towards keyway positioning hole opening. The utility model provides a tool fixture for processing high pressure switch explosion -proof outlet box, has solved the problem of high reject rate of outlet box of prior art, the utility model can make outlet and internal blind hole position fixed, reduce the reject rate of outlet box production.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to a tooling fixture for processing explosion-proof terminal boxes of high-voltage switches. Background Technology

[0002] In power systems, high-voltage switches, as key control equipment, need to operate stably in dangerous environments such as flammable and explosive environments. Therefore, their matching explosion-proof junction boxes have become one of the core components to ensure equipment safety. Existing explosion-proof junction boxes for high-voltage switches mostly adopt a cylindrical barrel-shaped structure design (such as...). Figure 1 As shown), its side is provided with a cable outlet 01. This cable outlet 01 needs to be used with an explosion-proof sealing ring and a compression nut to form an explosion-proof channel for the cable to enter and exit, ensuring that when the power line and control line pass through, they can effectively block the contact between the explosion flame inside the box and the external hazardous environment. The bottom of the cylindrical barrel-shaped structure also has several raised keyways 02 integrally formed. Several blind holes 03 are opened above the raised keyways 02. The function of these raised keyways 02 is to set blind holes 03, so as to avoid the reduction of the explosion-proof capability of the outlet box by directly opening blind holes on the outlet box. The function of these blind holes 03 is to cooperate with the fixing screws to achieve precise positioning and stable installation of the high-voltage switch body inside the box (by passing the screw through the mounting hole of the high-voltage switch and screwing it into the blind hole, the high-voltage switch can be fixed on the raised keyway). This prevents the high-voltage switch from shifting due to vibration during equipment operation, which may lead to faults such as poor electrical contact. Based on the above structural and functional requirements, there are positional accuracy requirements between the outlet and the blind hole: on the one hand, the outlet must maintain a coaxial positional relationship with the cable interface of the high-voltage switch fixed by the blind hole to ensure that the cable can smoothly pass through the outlet and connect with the high-voltage switch, avoiding bending or pulling of the cable due to positional deviation; on the other hand, if the positional deviation between the outlet and the blind hole is too large, it may cause abnormal compression between the cable and the inner wall of the outlet and the explosion-proof sealing ring when the cable is passed through, damaging the explosion-proof sealing structure and losing the explosion-proof capability. However, in the current processing of explosion-proof outlet boxes for high-voltage switches, the actual positions of the raised keyway and the outlet do not need to be very precise. Since the wire itself can be bent to a certain extent and will not affect subsequent wiring within a certain angle range, the cylindrical workpiece is usually clamped and fixed directly using a general-purpose fixture after manual judgment. The clamping angle of the fixture on the workpiece is mostly set arbitrarily. However, this rough processing method may lead to excessive positional deviation between the finished outlet and the internal blind hole. Outlet boxes with excessive positional deviation may affect subsequent wiring operations and become defective products. Therefore, the defect rate of existing outlet boxes is high. Utility Model Content

[0003] To address the aforementioned technical problems, the tooling fixture provided by this utility model for processing explosion-proof terminal boxes for high-voltage switches can fix the position of the terminal outlet and the internal blind hole, thereby reducing the defect rate in the production of terminal boxes.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: This utility model provides a tooling fixture for processing explosion-proof terminal boxes for high-voltage switches, comprising a base and a workpiece positioning assembly; the upper side of the base is provided with an arc-shaped concave surface; the axis of the arc-shaped concave surface is horizontal; a first stop block is provided on the side of the base; the first stop block has a vertically arranged first stop surface; the first stop surface is perpendicular to the axis of the arc-shaped concave surface; the workpiece positioning assembly is detachably fixed to the base; when the workpiece positioning assembly is fixed to the base, the horizontal distance between the workpiece positioning assembly and the base can be adjusted; the workpiece positioning assembly includes a positioning block; the positioning block has a plurality of keyway positioning holes for adapting to the shape of the keyway; the direction of adjusting the horizontal distance between the workpiece positioning assembly and the base is consistent with the extension direction of the hole axis of the keyway positioning hole; the first stop surface faces the opening of the keyway positioning hole.

[0005] The tooling fixture for processing explosion-proof terminal boxes of high-voltage switches provided by this utility model preferably includes a plurality of pins on the positioning block; each keyway positioning hole contains one pin; and the pins are arranged along the axis of the keyway positioning hole.

[0006] The tooling fixture provided by this utility model for processing explosion-proof terminal boxes of high-voltage switches preferably further includes several bolts; the workpiece positioning assembly further includes a connecting plate; the surface of the connecting plate is vertical; the positioning block is fixed on the vertical surface of the connecting plate; several threaded holes are provided on the base; several fixing holes are provided on the surface of the connecting plate; the axis of the threaded holes faces the connecting plate; the threaded holes are located below the arc concave surface; the bolts can pass through the fixing holes and be fixed into the threaded holes.

[0007] The tooling fixture for processing explosion-proof terminal boxes of high-voltage switches provided by this utility model preferably includes a fixed base plate as part of the workpiece positioning assembly; the connecting plate is fixedly connected to the fixed base plate; the fixed base plate is horizontal; the fixed base plate is disposed on the side facing away from the positioning block; the lower side of the fixed base plate is coplanar with the lower side of the base; and the fixed base plate is provided with a plurality of first limiting holes in the vertical direction.

[0008] The tooling fixture provided by this utility model for processing explosion-proof terminal boxes of high-voltage switches preferably has a second fixed base plate provided on the base facing away from the workpiece positioning assembly; the lower bottom surface of the second fixed base plate is flush with the lower bottom surface of the base; and the second fixed base plate has a plurality of second limiting holes in the vertical direction.

[0009] The above technical solution has the following advantages or beneficial effects: This utility model provides a tooling fixture for processing explosion-proof terminal boxes for high-voltage switches, relating to the field of fixture technology. It includes a base and a workpiece positioning assembly. The base has an arc-shaped concave surface on its upper side. The axis of the arc-shaped concave surface is horizontal. A first stop block is provided on the side of the base. The first stop block has a vertically arranged first stop surface. The first stop surface is perpendicular to the axis of the arc-shaped concave surface. The workpiece positioning assembly is detachably fixed to the base. When the workpiece positioning assembly is fixed to the base, the horizontal distance between it and the base can be adjusted. The workpiece positioning assembly includes a positioning block. The positioning block has several keyway positioning holes for adapting to the shape of the keyway. The direction in which the horizontal distance between the workpiece positioning assembly and the base is adjusted is consistent with the extension direction of the hole axis of the keyway positioning hole. The first stop surface faces the opening of the keyway positioning hole. The tooling fixture provided by this utility model for processing explosion-proof terminal boxes for high-voltage switches solves the problem of high defect rate of existing terminal boxes. This utility model can fix the position of the terminal outlet and the internal blind hole, reducing the defect rate of terminal box production. Attached Figure Description

[0010] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not intentionally drawn to scale; the focus is on illustrating the gist of the invention.

[0011] Figure 1 This is a schematic diagram of the overall structure of the explosion-proof outlet box for high-voltage switches mentioned in the background technology of this utility model.

[0012] Figure 2 This is a schematic diagram of the base structure of the tooling fixture for processing explosion-proof terminal boxes of high-voltage switches provided in Embodiment 1 of this utility model.

[0013] Figure 3 This is a schematic diagram of the workpiece positioning component structure of the tooling fixture for processing explosion-proof terminal boxes of high-voltage switches, provided in Embodiment 1 of this utility model.

[0014] Figure 4 This is a schematic diagram of the tooling fixture for processing explosion-proof terminal boxes of high-voltage switches provided in Embodiment 1 of this utility model when clamping the workpiece. Detailed Implementation

[0015] Example 1: The tooling fixture for processing explosion-proof terminal boxes of high-voltage switches provided in Embodiment 1 of this utility model, such as Figures 2 to 4 As shown, the assembly includes a base 1 and a workpiece positioning component 2. The upper side of the base 1 has an arc-shaped concave surface 11 with a horizontal axis. A first stop 12 is provided on the side of the base 1. The first stop 12 has a vertically arranged first stop surface 121, which is perpendicular to the axis of the arc-shaped concave surface 11. The workpiece positioning component 2 is detachably fixed to the base 1. When the workpiece positioning component 2 is fixed to the base 1, the horizontal distance between it and the base 1 can be adjusted. The workpiece positioning component 2 includes a positioning block 21. The positioning block 21 has several keyway positioning holes 211 for adapting to the shape of the keyway. The direction in which the horizontal distance between the workpiece positioning component 2 and the base 1 is adjusted is consistent with the extension direction of the keyway positioning hole 211. The first stop surface 121 opens towards the keyway positioning hole 211.

[0016] In the first embodiment of this utility model, the tooling fixture for processing explosion-proof outlet boxes of high-voltage switches provides the following: During operation, the cylindrical outer wall of the explosion-proof outlet box (hereinafter referred to as the workpiece) engages with the arc-shaped concave surface 11 on the upper side of the base 1, restricting its axial position. Then, its opening is controlled to face the positioning block 21, causing the protruding keyway of the workpiece to align and insert into the keyway positioning hole 211, thereby restricting the workpiece from rotating around its cylindrical axis. The cylindrical bottom of the workpiece abuts against the first stop surface 121, forming a horizontal limit. The positioning block 21 extends into the cylindrical interior of the workpiece, and its end presses the workpiece against the first stop surface 121, thus completing the workpiece's limiting position. Compared with the prior art, the structure provided in this embodiment allows the upward-facing part of the workpiece to be fixed after it is fixed. Since the upward-facing part of the workpiece is where the outlet needs to be opened, the position of the upward-facing part of the workpiece can be fixed under the premise that the keyway positioning hole 211 is fixed. The operator can then use a CNC center to vertically mill downwards to complete the processing of the outlet.

[0017] The tooling fixture for processing explosion-proof outlet boxes of high-voltage switches provided in Embodiment 1 of this utility model solves the problem of high defect rate of outlet boxes in the prior art. This utility model can fix the position of the outlet and the internal blind hole, thereby reducing the defect rate of outlet box production.

[0018] To further precisely define the position of the workpiece, in this embodiment, the positioning block 21 is also provided with several pins 212; each keyway positioning hole 211 is provided with one pin 212; the pins 212 are arranged along the axis of the keyway positioning hole 211. The shape of the pins 212 matches the blind hole 03 of the workpiece. On the one hand, if the workpiece cannot be fully inserted (the workpiece is fully inserted so that the protruding keyway 02 of the workpiece is in the keyway positioning hole 211), it may indicate that the blind hole 03 of the workpiece is machined incorrectly. This can detect defective products in advance and avoid further processing of the outlet. On the other hand, when the pins 212 are inserted into the blind hole, the pins 212 can prevent the workpiece from radially shifting in the keyway positioning hole 211, and can more accurately limit the position of the workpiece.

[0019] To specifically achieve the position adjustment between the base 1 and the workpiece positioning assembly 2 and the fixation of the workpiece, as a specific solution, in this embodiment, several bolts 3 are also included; the workpiece positioning assembly 2 also includes a connecting plate 22; the surface of the connecting plate 22 is vertical; the positioning block 21 is fixed on the vertical surface of the connecting plate 22; several threaded holes 13 are provided on the base 1; several fixing holes 221 are provided on the surface of the connecting plate 22; the axis of the threaded hole 13 faces the connecting plate 22; the threaded hole 13 is located below the arc concave surface 11; the bolts 3 can pass through the fixing holes 221 and be fixed into the threaded hole 13. By using bolts 3 to pass through the fixing holes 221 of the connecting plate 22 and engage with the threaded holes 13 of the base 1, the workpiece positioning assembly 2 (including the positioning block 21) can be fixed on the base 1, ensuring that the workpiece positioning assembly 2 will not shift due to cutting force, vibration, or other factors during processing, and the workpiece can be stably fixed for processing. The threaded holes 13 are located below the arc concave surface 11, and the hole axis faces the connecting plate 22, so as to ensure that the bolts 3 will not contact the workpiece on the arc concave surface 11 when tightened. The engagement of multiple threaded holes 13 with the fixing holes 221 forms multi-point positioning, which can also limit the warping of the connecting plate 22, thereby avoiding the situation where the axis of the workpiece is not horizontal after being fixed due to the warping of the connecting plate 22 affecting the angle of the contact surface between the positioning block 21 and the workpiece.

[0020] As a preferred embodiment, in this example, the workpiece positioning assembly 2 further includes a fixed base plate 23; a connecting plate 22 is fixedly connected to the fixed base plate 23; the surface of the fixed base plate 23 is horizontal; the fixed base plate 23 is located on the side opposite to the positioning block 21; the lower side of the fixed base plate 23 is coplanar with the lower side of the base 1; and the fixed base plate 23 has a plurality of first limiting holes 231 in the vertical direction. The lower side of the fixed base plate 23 is coplanar with the lower side of the base 1, and the two together form a flat mounting reference surface that fits against the worktable surface of the CNC machining center; the first limiting holes 231 in the vertical direction can cooperate with positioning pins to directly fix the fixed base plate 23 to the worktable; thus avoiding workpiece displacement caused by the overall displacement of the fixture due to cutting force during machining.

[0021] In this embodiment, a second fixed base plate 14 is provided on the base 1 facing away from the workpiece positioning assembly 2; the lower bottom surface of the second fixed base plate 14 is flush with the lower bottom surface of the base 1; the second fixed base plate 14 has a plurality of second limiting holes 141 in the vertical direction. When the workpiece is milling the side exit, the cutting force will be transmitted to the fixture in the horizontal direction. The second fixed base plate 14 is rigidly connected to the worktable through the second limiting holes 141, which can form a support point on the side of the base 1 away from the workpiece positioning assembly 2. This support point and the fixed base plate 23 on the side of the workpiece positioning assembly 2 (the pin passes through the first limiting hole 231 and is fixed to the worktable) form a two-point clamping, which can resist the torque generated by the cutting force on the base and avoid the connection between the base 1 and the workpiece positioning assembly 2 from being deformed by torsion, thereby affecting the clamping accuracy of the workpiece.

[0022] In summary, this utility model provides a tooling fixture for processing explosion-proof terminal boxes for high-voltage switches, relating to the field of fixture technology. It includes a base and a workpiece positioning assembly. The base has an arc-shaped concave surface on its upper side. The axis of the arc-shaped concave surface is horizontal. A first stop block is provided on the side of the base. The first stop block has a vertically arranged first stop surface. The first stop surface is perpendicular to the axis of the arc-shaped concave surface. The workpiece positioning assembly is detachably fixed to the base. When the workpiece positioning assembly is fixed to the base, the horizontal distance between it and the base can be adjusted. The workpiece positioning assembly includes a positioning block. The positioning block has several keyway positioning holes for adapting to the shape of the keyway. The direction in which the horizontal distance between the workpiece positioning assembly and the base is adjusted is consistent with the extension direction of the hole axis of the keyway positioning hole. The first stop surface faces the opening of the keyway positioning hole. The tooling fixture provided by this utility model for processing explosion-proof terminal boxes for high-voltage switches solves the problem of high defect rate in existing terminal boxes. This utility model can fix the position of the terminal outlet and the internal blind hole, reducing the defect rate in terminal box production.

[0023] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A tooling fixture for processing explosion-proof terminal boxes of high-voltage switches, characterized in that, Includes base and workpiece positioning components; The upper side of the base is provided with an arc-shaped concave surface; the axis of the arc-shaped concave surface is horizontal. A first stop is provided on the side of the base; the first stop has a vertically arranged first stop surface; the first stop surface is perpendicular to the axis of the arc concave surface; The workpiece positioning component is detachably fixed to the base; when the workpiece positioning component is fixed to the base, the horizontal distance between it and the base can be adjusted. The workpiece positioning assembly includes a positioning block; the positioning block has a plurality of keyway positioning holes for adapting to the shape of the keyway; the direction of adjusting the horizontal distance between the workpiece positioning assembly and the base is consistent with the extension direction of the hole axis of the keyway positioning hole. The first abutment faces the opening of the keyway positioning hole.

2. The tooling fixture for processing explosion-proof terminal boxes of high-voltage switches as described in claim 1, characterized in that, The positioning block is also provided with several pins; Each of the keyway positioning holes is provided with a pin; the pin is arranged along the axis of the keyway positioning hole.

3. The tooling fixture for processing explosion-proof terminal boxes of high-voltage switches as described in claim 1, characterized in that, It also includes several bolts; The workpiece positioning assembly further includes a connecting plate; the surface of the connecting plate is vertical. The positioning block is fixed to the vertical surface of the connecting plate; The base has several threaded holes; the connecting plate has several fixing holes. The threaded hole shaft faces the connecting plate; the threaded hole is located below the arc concave surface; The bolt can pass through the fixing hole and be fitted into the threaded hole.

4. The tooling fixture for processing explosion-proof terminal boxes of high-voltage switches as described in claim 3, characterized in that, The workpiece positioning assembly also includes a fixed base plate; The connecting plate is fixedly connected to the fixed base plate; The fixed base plate is horizontal; the fixed base plate is located on the side opposite to the positioning block; The lower side of the fixed base plate is coplanar with the lower side of the base. The fixed base plate has several first limiting holes in the vertical direction.

5. The tooling fixture for processing explosion-proof terminal boxes of high-voltage switches as described in claim 1, characterized in that, The base is provided with a second fixed base plate facing away from the workpiece positioning assembly; the bottom surface of the second fixed base plate is flush with the bottom surface of the base. The second fixed base plate has several second limiting holes in the vertical direction.

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