A positioning fixture for odd-groove micrometer frame

Abstract

The utility model discloses a positioning fixture for odd number groove micrometer frame, including electric indexing head device, four square rotary table, four square rotary table is tetrahedron structure, and four side surfaces can all be equipped with fixture mainboard, four square rotary table is connected with electric indexing head device through connecting assembly, electric indexing head device can drive four square rotary table index rotation to drive fixture mainboard synchronous rotation, be provided with positioning assembly and pressure assembly on the fixture mainboard, connecting assembly is used for the connecting fixed of four square rotary table and electric indexing head device, fixture mainboard and four square rotary table, and this fixture is reliable and safe through micrometer frame positioning, clamping, and the indexing device is combined into an organic whole with machine tool by numerical control programming, and all mechanical processing procedures of odd number groove frame can be processed after once clamping, and because the procedure is concentrated into one sequence, thereby save each sequence fixture, drill jig and the turnover time between procedures, greatly improve the processing efficiency, and product quality also further improves.

Description

Technical Field

[0001] This utility model relates to the field of micrometer machining fixtures, and in particular to a positioning fixture for an odd-groove micrometer frame. Background Technology

[0002] Odd-groove micrometers are precision measuring tools used when machining parts with an odd number of grooves on their outer diameter. The machining accuracy of the micrometer frame directly determines the overall accuracy of the micrometer. Existing odd-groove micrometer frame machining requires multiple processes, including milling the round head plane, drilling and reaming the round head hole, milling the internal cavity and angle, controlling the measurement limit dimension, and milling the crescent groove of the measuring anvil. Each process requires special fixtures and drill jigs, which is not only cumbersome and costly in terms of equipment investment, but also results in long turnaround times between processes, low processing efficiency, and the possibility of positioning errors due to multiple clamping, making it difficult to guarantee the stability of the frame machining quality and meet the requirements of high-precision and high-efficiency production. Utility Model Content

[0003] The present invention aims to solve the problems mentioned in the background art and provides a positioning fixture for odd-groove micrometer frame, so as to solve the problems of scattered processes, low efficiency and difficulty in guaranteeing accuracy in the existing processing of odd-groove micrometer frames.

[0004] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: a positioning fixture for an odd-groove micrometer frame, comprising an electric indexing head device and a four-sided rotary table. The four-sided rotary table has a tetrahedral structure, and a fixture main board can be mounted on each of its four sides. The four-sided rotary table is connected to the electric indexing head device through a connecting component. The electric indexing head device can drive the four-sided rotary table to rotate at indexing intervals, thereby driving the fixture main board to rotate synchronously. The fixture main board is provided with a positioning component and a clamping component. The connecting component is used for connecting and fixing the four-sided rotary table to the electric indexing head device and the fixture main board to the four-sided rotary table.

[0005] Furthermore, the positioning component includes positioning block one, positioning block two, positioning block three, and ruler head positioning block; positioning block one is disposed on one side of the main plate of the fixture and is used for lateral positioning of the ruler frame; positioning block two is disposed on the other side of the main plate of the fixture and is used for tight fit with the outer arc of the ruler frame; the ruler frame is placed above positioning block three and ruler head positioning block.

[0006] Furthermore, the clamping assembly includes a pressure plate base, a tightening screw A, and a tightening screw B; the pressure plate base is fixed on the main clamp plate; the tightening screw A is connected to one end of the ruler head pressure plate; the tightening screw B is connected to one end of the ruler tail pressure plate, and tightening the tightening screws A and B can respectively drive the other ends of the ruler head pressure plate and the ruler tail pressure plate to clamp the ruler frame.

[0007] Furthermore, the connecting assembly includes a positioning pin, a screw, an indexing connecting plate, and a positioning mandrel. The fixture main board is positioned by the positioning pin, and the screw locks and fixes the positioned fixture main board to the four-sided rotary table. The positioning mandrel and the indexing connecting plate are used in conjunction with the four-sided rotary table.

[0008] Compared with the prior art, this utility model has the following advantages: This invention uses a tetrahedral base rotary table as its core, combined with multi-directional positioning components and adjustable clamping components, to achieve precise positioning and reliable clamping of the ruler frame, avoiding accuracy errors caused by machining displacement. With the indexing rotation function of the electric indexing head device, all machining processes of the ruler frame can be completed in one clamping, saving the investment cost of special fixtures and drill jigs for each process, greatly shortening the process turnaround time, significantly improving processing efficiency, and reducing the accumulation of errors from multiple clampings, ensuring product quality stability and meeting the mass production needs of high-precision odd-groove micrometer ruler frames. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] Legend: 1-Four-sided rotary table, 2-Pressure plate base, 3-Tightening screw A, 4-Leg head pressure plate, 5-Positioning block one, 6-Positioning block two, 7-Leg head positioning block, 8-Positioning pin, 9-Positioning block three, 10-Screw, 11-Clamping main board, 12-Leg tail pressure plate, 13-Tightening screw B, 14-Indexing connecting plate, 15-Positioning spindle. Detailed Implementation

[0011] The following will refer to the appendix in the embodiments of this utility model. Figure 1The technical solution in this utility model embodiment is clearly and completely described as follows: A positioning fixture for an odd-groove micrometer frame includes an electric indexing head device and a square rotary table 1. The square rotary table 1 has a tetrahedral structure, and each of its four sides can be equipped with a fixture main board 11, enabling simultaneous processing at multiple workstations. The square rotary table 1 is connected to the electric indexing head device through a connecting component. The connecting component precisely mates and fixes the square rotary table 1 to the electric indexing head device. After the fixture main board 1 is precisely positioned by the positioning pin 8, it is locked to the side of the square rotary table 1 with screws 10. The electric indexing head device can drive the square rotary table 1 to rotate at indexing intervals to drive the fixture main board. 11. Synchronous rotation; the main fixture 11 is equipped with positioning components and clamping components. Positioning block 1, positioning block 3, and ruler head positioning block 7 in the positioning components are fixed on the main fixture 11 to support the ruler frame. The lateral positioning surface of positioning block 1 5 fits against the outer side of the ruler frame, and positioning block 2 6 is pressed against the outer arc of the ruler frame to achieve multi-directional precise positioning of the ruler frame. The clamping components can ensure that there is no displacement of the ruler frame during processing. The connecting components are used to connect and fix the four-sided rotary table 1 with the electric indexing head device and the main fixture 11 with the four-sided rotary table 1. The main fixture 11 is equipped with multiple sets of positioning components and clamping components to achieve high-efficiency production and improve production capacity.

[0012] Specifically, the positioning components include positioning block 1 5, positioning block 2 6, positioning block 3 9, and ruler head positioning block 7; positioning block 1 5 is disposed on one side of the main plate of the clamp 11 and is used for lateral positioning of the ruler frame; positioning block 2 6 is disposed on the other side of the main plate of the clamp 11 and is used for tight fit with the outer arc of the ruler frame; the ruler frame is placed above positioning block 3 9 and ruler head positioning block 7.

[0013] Specifically, the clamping assembly includes a pressure plate base 2, a tightening screw A3, and a tightening screw B13; the pressure plate base 2 is fixed on the main clamp 11; the tightening screw A3 is connected to one end of the ruler head pressure plate 4; the tightening screw B13 is connected to one end of the ruler tail pressure plate 12, and tightening the tightening screws A3 and B13 can respectively drive the other ends of the ruler head pressure plate 4 and the ruler tail pressure plate 12 to clamp the ruler frame.

[0014] Specifically, the connecting assembly includes a positioning pin 8, a screw 10, an indexing connecting plate 14, and a positioning spindle 15. The fixture main board 11 is positioned by the positioning pin 8, and the screw 10 locks and fixes the positioned fixture main board 11 onto the four-sided rotary table 1. The positioning spindle 15 and the indexing connecting plate 14 are used in conjunction with the four-sided rotary table 1 to connect the four-sided rotary table 1 to the electric indexing head device.

[0015] In use, the positioning mandrel 15, indexing connecting plate 14, and square rotary table 1 are bolted to the electric indexing head device. The fixture main plate 11 is then positioned and fixed on the square rotary table 1 using positioning pins 8 and screws 10. When machining odd-groove ruler frames, the odd-groove ruler frame is placed on positioning block 1 5, positioning block 3 9, and ruler head positioning block 7. The outer side of the odd-groove ruler frame is pressed against the lateral positioning surface of positioning block 1 5, and the outer arc of the ruler frame is pressed against positioning block 2 6. Tightening screws A3 and B13 drives the ruler head pressure plate 4 and ruler tail pressure plate 12 to press the ruler frame, thus fixing it in place on the fixture. The indexing rotation of the electric indexing head device enables the machining of the ruler head hole, the front inner shape cavity and angle, the anvil crescent groove, and the ruler head locking hole, while controlling the ruler frame's measurement limits. Since the square rotary table 1 has four sides, the fixture main plate 11 can be mounted on each side, thus achieving four-sided clamping for part machining.

[0016] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A positioning fixture for an odd-groove micrometer frame, comprising an electric indexing head device and a four-sided rotary table (1), characterized in that: The square rotary table (1) has a tetrahedral structure, and each of its four sides can be equipped with a fixture main board (11). The square rotary table (1) is connected to the electric indexing head device through a connecting component. The electric indexing head device can drive the square rotary table (1) to rotate in an indexing manner so as to drive the fixture main board (11) to rotate synchronously. The fixture main board (11) is provided with a positioning component and a clamping component. The connecting component is used for connecting and fixing the square rotary table (1) to the electric indexing head device and the fixture main board (11) to the square rotary table (1).

2. A positioning fixture for an odd-groove micrometer frame according to claim 1, characterized in that: The positioning components include positioning block one (5), positioning block two (6), positioning block three (9) and ruler head positioning block (7); positioning block one (5) is located on one side of the clamp main board (11) for lateral positioning of the ruler frame; positioning block two (6) is located on the other side of the clamp main board (11) for tight fit of the outer arc of the ruler frame; the ruler frame is placed above positioning block three (9) and ruler head positioning block (7).

3. A positioning fixture for an odd-groove micrometer frame according to claim 1, characterized in that: The clamping assembly includes a pressure plate base (2), a tightening screw A (3), and a tightening screw B (13); the pressure plate base (2) is fixed on the main clamp (11); the tightening screw A (3) is connected to one end of the ruler head pressure plate (4) and is used in cooperation; the tightening screw B (13) is connected to one end of the ruler tail pressure plate (12) and is used in cooperation. Tightening the tightening screw A (3) and the tightening screw B (13) can respectively drive the other end of the ruler head pressure plate (4) and the ruler tail pressure plate (12) to clamp the ruler frame.

4. A positioning fixture for an odd-groove micrometer frame according to claim 1, characterized in that: The connecting components include a positioning pin (8), a screw (10), an indexing connecting plate (14), and a positioning mandrel (15). The fixture main board (11) is positioned by the positioning pin (8), and the screw (10) locks the positioned fixture main board (11) onto the square rotary table (1). The positioning mandrel (15) and the indexing connecting plate (14) are used in conjunction with the square rotary table (1).

Images