Tooling fixture for processing an explosion-proof switch terminal board

Abstract

The utility model provides a tool fixture for processing anti -explosion switch terminal board relates to fixture technical field, including base, a plurality of pressboard, a plurality of bolts and a plurality of pin shafts, the upper surface of base is seted up cylindrical recess, pressboard is detachably fixed on the base through bolt, the vertical height of pressboard downside is adjusted by rotating bolt, bolt sets up outside cylindrical recess, the inside of cylindrical recess is seted up first blind hole, second blind hole and third blind hole, and pin shaft is matched with first blind hole, second blind hole, third blind hole, the utility model provides a tool fixture for processing anti -explosion switch terminal board, has solved the problem of low efficiency of existing technology anti -explosion switch terminal board clamping, low production efficiency, the utility model can promote anti -explosion switch terminal board clamping efficiency.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, and in particular to tooling fixtures for processing explosion-proof switch terminal blocks. Background Technology

[0002] Explosion-proof switch terminal block, such as Figures 1 to 3 As shown, it is a circular plate-shaped part. Figure 1 ), its A side ( Figure 2 The surface B is equipped with a first circular hole 001, a second circular hole 002, a third circular hole 003, a fourth circular hole 004, a fifth circular hole 005, and an irregularly shaped groove. Figure 3 It is provided with a sixth circular hole 006, a first hexagonal countersunk hole 007, a seventh circular hole 008, a second hexagonal countersunk hole 009, and a third hexagonal countersunk hole 010; wherein, the first circular hole 001 is opposite to the first hexagonal countersunk hole 007; the second circular hole 002 is opposite to the sixth circular hole 006; the third circular hole 003 is opposite to the third hexagonal countersunk hole 010; the fourth circular hole 004 is opposite to the second hexagonal countersunk hole 009; and the fifth circular hole 005 is opposite to the seventh circular hole 008.

[0003] In the process of machining the above parts, it is necessary to mill the different hole systems and grooves on the front and back sides. In the application of general fixtures such as vises, if the outer circle of the part is directly used as the clamping datum, it is difficult to ensure the coaxiality of the A-face and B-face faces, resulting in poor positioning accuracy. Moreover, if the positioning is done manually, it takes five to ten minutes to find the alignment and adjust, resulting in low clamping efficiency. Utility Model Content

[0004] To address the aforementioned technical problems, the tooling fixture provided by this utility model for processing explosion-proof switch terminal blocks can improve the clamping efficiency of explosion-proof switch terminal blocks.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: The present invention provides a tooling fixture for processing explosion-proof switch terminal blocks, comprising a base, multiple pressure plates, multiple bolts, and multiple pins; a cylindrical groove is formed on the upper surface of the base; the pressure plates are detachably fixed to the base by the bolts; rotating the bolts can adjust the vertical height of the lower side of the pressure plates; the bolts are located on the outside of the cylindrical groove; a first blind hole, a second blind hole, and a third blind hole are formed inside the cylindrical groove; the pins are matched with the first blind hole, the second blind hole, and the third blind hole.

[0006] The tooling fixture for processing explosion-proof switch terminal blocks provided by this utility model preferably further includes several springs; the springs are provided at the bottom of the first blind hole, the second blind hole and the third blind hole; the bottom of the pin is provided at the upper end of the spring; the spring can push the upper end of the pin above the opening on the upper side of the first blind hole, the second blind hole and the third blind hole; the spring can shorten after being subjected to a vertically downward force.

[0007] The tooling fixture for processing explosion-proof switch terminal blocks provided by this utility model preferably has a central hole at the end of the pin shaft; when the pin shaft is fixed in the first blind hole, the second blind hole and the third blind hole, the central hole faces upward.

[0008] The tooling fixture for processing explosion-proof switch terminal blocks provided by this utility model preferably has an L-shaped structure plate as the pressure plate; the pressure plate includes a horizontal plate and a vertical block; the horizontal plate and the vertical block are fixed to each other; the vertical block is detachably fixed to the bolt; and the lower side of the horizontal plate is horizontal.

[0009] The tooling fixture for processing explosion-proof switch terminal blocks provided by this utility model preferably has the pressure plates evenly distributed along the circumferential direction of the cylindrical groove.

[0010] The above technical solution has the following advantages or beneficial effects: This utility model provides a tooling fixture for processing explosion-proof switch terminal blocks, relating to the field of fixture technology. It includes a base, multiple pressure plates, multiple bolts, and multiple pins. A cylindrical groove is formed on the upper surface of the base. The pressure plates are detachably fixed to the base by the bolts. Rotating the bolts adjusts the vertical height of the lower side of the pressure plates. The bolts are located outside the cylindrical groove. A first blind hole, a second blind hole, and a third blind hole are formed inside the cylindrical groove. The pins are matched with the first blind hole, the second blind hole, and the third blind hole. This utility model provides a tooling fixture for processing explosion-proof switch terminal blocks, solving the problems of low clamping efficiency and low production efficiency in existing explosion-proof switch terminal block technology. This utility model can improve the clamping efficiency of explosion-proof switch terminal blocks. Attached Figure Description

[0011] 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.

[0012] Figure 1 This is a schematic diagram of the overall structure of the explosion-proof switch terminal block mentioned in the background technology of this utility model.

[0013] Figure 2 This is a schematic diagram of the A-side structure of the explosion-proof switch terminal block mentioned in the background technology of this utility model.

[0014] Figure 3 This is a schematic diagram of the B-side structure of the explosion-proof switch terminal block mentioned in the background technology of this utility model.

[0015] Figure 4 This is a schematic diagram of the overall structure of the tooling fixture for processing explosion-proof switch terminal blocks provided in Embodiment 1 of this utility model.

[0016] Figure 5 This is a schematic diagram of the tooling fixture for processing explosion-proof switch terminal blocks provided in Embodiment 1 of this utility model when the workpiece is clamped with surface A facing upwards. Detailed Implementation

[0017] Example 1: The tooling fixture for processing explosion-proof switch terminal blocks provided in Embodiment 1 of this utility model, such as Figures 1 to 5 As shown, the device includes a base 1, multiple pressure plates 2, multiple bolts 3, and multiple pins 4. A cylindrical groove 11 is provided on the upper surface of the base 1. (The size of the cylindrical groove 11 is consistent with the outer diameter of the circular plate structure of the explosion-proof switch terminal block, and the terminal block can be coaxially fixed to the cylindrical groove 11.) The pressure plates 2 are detachably fixed to the base 1 by the bolts 3. The vertical height of the lower side of the pressure plate 2 can be adjusted by rotating the bolts 3. The bolts 3 are located on the outside of the cylindrical groove 11. A first blind hole 111, a second blind hole 112, and a third blind hole 113 are provided inside the cylindrical groove 11. The pins 4 are matched with the first blind hole 111, the second blind hole 112, and the third blind hole 113.

[0018] The tooling fixture for processing explosion-proof switch terminal blocks provided in Embodiment 1 of this utility model requires three clamping operations to complete the processing of the A and B sides of the terminal block. First clamping: Processing the first to fifth circular holes on side A: Place the explosion-proof switch terminal block blank into the cylindrical groove 11 of the base 1. Utilize the matching dimensions of the cylindrical groove 11 with the outer circle of the workpiece (coaxial fixation) to achieve initial coaxial positioning of the workpiece and the base, limiting the radial movement of the workpiece in the horizontal direction. Adjust the vertical height of the pressure plate 2 using bolts 3, so that the lower side of the pressure plate 2 presses against the edge of the workpiece's A side. After fixing, sequentially mill the first circular hole 001, the second circular hole 002, the third circular hole 003, the fourth circular hole 004, and the fifth circular hole 005 on side A. Second clamping: Machining the sixth and seventh round holes and three hexagonal countersunk holes on side B: Loosen bolt 3, remove the workpiece and flip it over. At this time, side B of the workpiece is facing up. Insert the pins 4 into the first blind hole 111 and the second blind hole 112 of the base respectively (the pins 4 match the blind holes and the round holes on side A); Place the workpiece with side B facing up into the cylindrical groove 11, so that the first round hole 001 and the third round hole 003 on side A are respectively fitted into the pins 4 in the first blind hole 111 and the second blind hole 112. The two pins and the central axis of the cylindrical groove form a three-point positioning to restrict the rotation and horizontal movement of the workpiece; Adjust the pressure plate 2 to press the edge of side B of the workpiece, tighten the bolts 3 to fix it, and then machine the sixth round hole 006, the seventh round hole 008, the first hexagonal countersunk hole 007, the second hexagonal countersunk hole 009, and the third hexagonal countersunk hole 010 on side B. Third clamping: Machining the irregular groove on surface A: Loosen bolt 3, remove the workpiece and flip it over again, so that surface A of the workpiece is facing upwards. Remove the pin 4 from the second blind hole 112 and insert it into the third blind hole 113. Place the workpiece with surface A facing upwards into the cylindrical groove 11, so that the sixth circular hole 006 and the seventh circular hole 008 on surface B are respectively fitted into the pin 4 in the first blind hole 111 and the third blind hole 113. Position the workpiece again using the two pins and the central axis of the cylindrical groove. Adjust the pressure plate 2 to press the edge of surface A of the workpiece. The position of the pressure plate 2 should avoid the machining trajectory of the irregular groove. After tightening bolt 3 to fix it, mill the irregular groove on surface A. (The reason why the irregular groove on surface A needs to be machined last is that when the irregular groove is milled first during the first clamping and machining of surface A, a gap or discontinuous plane will be formed on surface A. When machining surface B later, it is not possible to use the complete plane of surface A for auxiliary positioning. It is necessary to rely on the round hole on surface A and the pin to cooperate. However, the presence of the groove may cause the support around the round hole to be weak, and the part is easy to shake during positioning.) Compared to existing technologies that use general-purpose fixtures with the outer circle of the workpiece as a reference, the error of the outer circle blank can easily lead to poor coaxiality accuracy of the A-side and B-side hole system of the workpiece. This structure achieves preliminary coaxial positioning through a cylindrical groove 11, and then uses a pin to cooperate with the machined hole for precise positioning. Through three clamping operations, all around the central axis of the hole system and groove of the workpiece, the coaxiality of the A-side and B-side hole system of the workpiece and the positional accuracy of the irregular groove and hole system are significantly improved, meeting the assembly requirements of explosion-proof switches.

[0019] The tooling fixture for processing explosion-proof switch terminal blocks provided in Embodiment 1 of this utility model solves the problems of low clamping efficiency and low production efficiency of explosion-proof switch terminal blocks in the prior art. This utility model can improve the clamping efficiency of explosion-proof switch terminal blocks.

[0020] To prevent the tool from cutting into the pin 4 when machining the previously positioned circular hole, this embodiment also includes several springs 5; springs 5 ​​are provided at the bottom of the first blind hole 111, the second blind hole 112, and the third blind hole 113; the springs 5 ​​extend vertically; the bottom of the pin 4 is located at the upper end of the spring 5 (the upper end of the spring 5 when naturally extended is below the opening above the first blind hole 111, the second blind hole 112, and the third blind hole 113); the springs 5 ​​can push the upper end of the pin 4 above the opening above the first blind hole 111, the second blind hole 112, and the third blind hole 113; the springs 5 ​​can shorten after being subjected to a vertically downward force. If pin 4 is rigidly fixed, the tool will simultaneously squeeze pin 4 and the edge of the workpiece hole when it overcuts. The inner wall of the hole will be scratched or deformed by the tool. If the tool overcuts, it will squeeze pin 4, causing pin 4 to compress spring 5 downwards. The extension and retraction design of spring 5 can absorb the overcutting force through the retraction of pin 4, reducing the squeezing damage of the tool to the workpiece hole. Even if there is a slight overcut, pin 4 will not squeeze and damage the inner wall of the workpiece hole, and the workpiece can still be repaired, thereby reducing the scrap of parts caused by production failures.

[0021] As a specific embodiment, a central hole 41 is provided at the end of the pin 4; when the pin 4 is fixed in the first blind hole 111, the second blind hole 112 and the third blind hole 113, the central hole 41 faces upward. The central hole 41 can accommodate the tip of the tool, allowing the tool to have more downward clearance.

[0022] As a preferred embodiment, in this case, the pressure plate 2 is an L-shaped structural plate; the pressure plate 2 includes a horizontal plate 21 and a vertical block 22; the horizontal plate 21 and the vertical block 22 are fixed to each other; the vertical block 22 is detachably fixed to the bolt 3; the lower surface of the horizontal plate 21 is horizontal. The vertical block 22 is located on the horizontal side of the workpiece, so the vertical block 22 can cooperate with the bolt 3 located outside the cylindrical groove 11. The horizontal plate 21 is located on top of the vertical block 22. When fixing the workpiece, the horizontal plate 21 extends towards the center of the cylindrical groove 11. When the vertical block 22 moves the horizontal plate 21 downward, the horizontal plate 21 can apply downward pressure to the upper edge of the workpiece to fix the workpiece.

[0023] To ensure that the pressure plate 2 exerts uniform pressure on the workpiece, in this embodiment, the pressure plate 2 is evenly distributed along the circumferential direction of the cylindrical groove 11.

[0024] In summary, this utility model provides a tooling fixture for processing explosion-proof switch terminal blocks, relating to the field of fixture technology. It includes a base, multiple pressure plates, multiple bolts, and multiple pins. A cylindrical groove is formed on the upper surface of the base. The pressure plates are detachably fixed to the base by the bolts. Rotating the bolts adjusts the vertical height of the lower side of the pressure plates. The bolts are located outside the cylindrical groove. A first blind hole, a second blind hole, and a third blind hole are formed inside the cylindrical groove. The pins are matched with the first blind hole, the second blind hole, and the third blind hole. The tooling fixture provided by this utility model for processing explosion-proof switch terminal blocks solves the problems of low clamping efficiency and low production efficiency in existing explosion-proof switch terminal block technology. This utility model can improve the clamping efficiency of explosion-proof switch terminal blocks.

[0025] 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 switch terminal blocks, characterized in that, Includes a base, multiple pressure plates, multiple bolts, and multiple pins; A cylindrical groove is formed on the upper surface of the base; The pressure plate is detachably fixed to the base by the bolt; rotating the bolt can adjust the vertical height of the lower side of the pressure plate; the bolt is located on the outside of the cylindrical groove; The cylindrical groove has a first blind hole, a second blind hole, and a third blind hole inside; the pin is matched with the first blind hole, the second blind hole, and the third blind hole.

2. The tooling fixture for processing explosion-proof switch terminal blocks as described in claim 1, characterized in that, It also includes several springs; the springs are provided at the bottom of the first blind hole, the second blind hole and the third blind hole; the springs extend vertically; the bottom of the pin is provided at the upper end of the spring; the springs can push the upper end of the pin out above the opening on the upper side of the first blind hole, the second blind hole and the third blind hole; The spring can shorten when subjected to a vertically downward force.

3. The tooling fixture for processing explosion-proof switch terminal blocks as described in claim 1, characterized in that, The pin has a central hole at its end; when the pin is fixed in the first blind hole, the second blind hole and the third blind hole, the central hole faces upward.

4. The tooling fixture for processing explosion-proof switch terminal blocks as described in claim 1, characterized in that, The pressure plate is an L-shaped structural plate; the pressure plate includes a horizontal plate and a vertical block; the horizontal plate and the vertical block are fixed to each other; The vertical block is detachably fixed to the bolt; The lower side of the horizontal plate is horizontal.

5. The tooling fixture for processing explosion-proof switch terminal blocks as described in claim 1, characterized in that, The pressure plates are evenly distributed along the circumference of the cylindrical groove.

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