Electronic digital display micrometer frame positioning clamp

Abstract

The utility model discloses a kind of electronic digital display micrometer scale frame positioning fixture, including bottom plate, scale frame, positioning pin, positioning support and stud bolt, the bottom plate is rectangular metal plate;The positioning pin is located at the bottom of bottom plate;The positioning support is fixed on the bottom plate surface;Positioning support is equipped with positioning shaft and scale frame ruler head hole cooperation;One end of the stud bolt is connected with bottom plate, and the other end is penetrated through pressing plate;The stud bolt is connected with lock nut screw thread to drive pressing plate to compress scale frame;The stud bolt is equipped with compression spring;The compression spring is located between pressing plate and lock nut, the fixture positioning is simple and reliable, clamping is convenient, once clamping processing can guarantee dimensional accuracy and the position accuracy requirement of each part, through numerical control programming, multi-station processing can be realized, greatly improve processing efficiency, make product quality have greatly improved and stable.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, and in particular to an electronic digital micrometer frame positioning fixture. Background Technology

[0002] The five-key electronic digital micrometer is a precision measuring tool used in machining. Its frame, as a core component, directly determines the installation accuracy of the electronic digital display assembly, thus affecting the overall measuring performance of the micrometer. Traditional frame machining requires multiple steps: a special drill jig is needed when machining the micrometer head hole using a bench drill; and a dedicated fixture is required when machining the grooves on a conventional milling machine. This results in long turnaround times between processes, and repeated clamping can easily lead to positioning errors, resulting in low machining efficiency and difficulty in guaranteeing dimensional and positional accuracy, failing to meet the requirements for product quality stability in mass production. Utility Model Content

[0003] The present invention aims to solve the problems mentioned in the background art above, and provides an electronic digital micrometer frame positioning fixture to solve the problems of cumbersome frame processing procedures, low efficiency and difficulty in ensuring accuracy.

[0004] To achieve the above-mentioned utility model objectives, the present utility model adopts the following technical solution: an electronic digital micrometer frame positioning fixture, comprising a base plate, a frame, a positioning pin, a positioning support, and a double-ended bolt. The base plate is a rectangular metal plate; the positioning pin is located on the bottom of the base plate; the positioning support is fixed to the surface of the base plate; the positioning support is provided with a positioning shaft that mates with the head hole of the frame; one end of the double-ended bolt is connected to the base plate, and the other end passes through the pressure plate; the double-ended bolt is threadedly connected to a locking nut to drive the pressure plate to press the frame; a compression spring is sleeved on the double-ended bolt; the compression spring is located between the pressure plate and the locking nut.

[0005] Furthermore, the inner side of the ruler head of the ruler frame is in contact with the shoulder end face of the positioning shaft; the positioning shaft is used to limit the axial displacement of the ruler frame and plays the role of cooperating with the positioning block to radially position the ruler frame.

[0006] Furthermore, the base plate is provided with leveling blocks; the leveling blocks contact the bottom of the ruler frame and are used to assist in supporting the ruler frame.

[0007] Furthermore, the base plate is equipped with support pins; the top of the support pins contacts the lower surface of the pressure plate to support the pressure plate and prevent the pressure plate from tilting, which would cause uneven force on the frame.

[0008] Furthermore, the compression spring is made of spring steel and can push the pressure plate upward to reset when the locking nut is loosened.

[0009] Compared with the prior art, this utility model has the following advantages: This invention achieves fixture positioning without additional alignment by using a positioning pin in conjunction with the positioning slot on the machine tool table, saving positioning time. Simultaneously, the matching of the positioning shaft and the ruler head hole, along with the limiting effect of the shaft shoulder end face, and the auxiliary positioning of the positioning block and the equalizing block, ensures a consistent machining datum for the ruler, effectively avoiding errors caused by multiple clamping operations. Furthermore, simply tightening the locking nut drives the pressure plate to clamp the ruler, simplifying operation. The return function of the compression spring facilitates quick removal and placement of the ruler after machining, improving operational efficiency. In addition, a single clamping operation can complete the machining of the ruler's plane, drilling, and milling of various cavities, reducing process turnaround time and avoiding accuracy deviations caused by multiple clamping operations. This improves the consistency of product dimensional and positional accuracy, significantly enhancing quality stability and meeting the needs of mass production. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a side view of the present invention.

[0011] Legend: 1-Base plate, 2-Elevation block, 3-Electronic digital display ruler frame, 4-Positioning block, 5-Positioning bracket, 6-Positioning shaft, 7-Positioning pin, 8-Pressure plate, 9-Locking nut, 10-Double-ended bolt, 11-Pressure plate support pin, 12-Compression spring. Detailed Implementation

[0012] The following will refer to the appendix in the embodiments of this utility model. Figure 1-2 The technical solution in this utility model embodiment is clearly and completely described as follows: An electronic digital micrometer frame positioning fixture includes a base plate 1, a frame 3, a positioning pin 7, a positioning support 5, and a double-ended bolt 10. The base plate 1 is a rectangular metal plate used to place on the worktable of a machining center. The positioning pin 7 is located on the bottom of the base plate 1 and is adapted to the positioning groove of the machine tool worktable. After insertion, the parallelism and perpendicularity of the fixture to the moving direction of the machine tool can be quickly determined. The positioning support 5 is fixed to the surface of the base plate 1. The positioning support 5 is provided with a positioning shaft 6 that mates with the head hole of the frame 3. One end of the double-ended bolt 10 is connected to the base plate 1, and the other end passes through a pressure plate 8. The double-ended bolt 10 is threadedly connected to a locking nut 9 to drive the pressure plate 8 to press the frame 3. A compression spring 12 is sleeved on the double-ended bolt 10. The compression spring 12 is located between the pressure plate 8 and the locking nut 9.

[0013] Specifically, the inner side of the ruler head of the ruler frame 3 is in contact with the shoulder end face of the positioning shaft 6; the positioning shaft 6 is used to limit the axial displacement of the ruler frame 3 and plays the role of cooperating with the positioning block 4 to radially position the ruler frame 3. The positioning shaft 6 is a stepped shaft, with the small diameter end diameter being consistent with the inner diameter of the ruler head hole of the electronic digital display ruler frame 3, and the large diameter end being assembled into the mounting hole at the top of the positioning support 5 through an interference fit. The shoulder end face of the positioning shaft 6 is in contact with the inner side of the ruler head of the ruler frame 3 to achieve axial positioning.

[0014] Specifically, the base plate 1 is provided with leveling blocks 2; the leveling blocks 2 are in contact with the bottom of the ruler frame 3 to ensure that the ruler frame 3 is horizontal and to assist in supporting the ruler frame 3.

[0015] Specifically, the base plate 1 is equipped with a support pin 11; the top of the support pin 11 contacts the lower surface of the pressure plate 8 to support the pressure plate 8, ensure that the pressure plate 8 is horizontal, and avoid the pressure plate 8 tilting, which would cause uneven force on the frame 3.

[0016] Specifically, the compression spring 12 is made of spring steel, which can push the pressure plate 8 upward to reset when the locking nut 9 is loosened, and will not cause the ruler frame 3 to deform due to excessive elastic force when clamped.

[0017] In use, first place the base plate 1 on the worktable of the machining center, insert the positioning pin 7 into the positioning slot of the worktable to complete the quick positioning of the fixture and the machine tool; then, fit the ruler head hole of the electronic digital display ruler 3 into the small diameter end of the positioning shaft 6, push the ruler 3 so that the inner side of the ruler head fits against the shoulder end face of the positioning shaft 6, and at the same time ensure that the bottom of the ruler 3 contacts the equal height block 2 and the outer side wall fits against the positioning block 4; then, turn the locking nut 9 clockwise, and drive the pressure plate 8 downward through the threaded transmission until the anti-slip pad on the lower surface of the pressure plate 8 presses the ruler 3, at which time the compression spring 12 is in a compressed state; start the machining center and perform drilling and milling of the various surfaces of the cavity on the ruler 3 according to the preset CNC program; after the machining is completed, turn the locking nut 9 counterclockwise, the compression spring 12 releases its elastic force and pushes the pressure plate 8 upward to reset, remove the machined ruler 3, and the next ruler 3 can be machined.

[0018] 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 electronic digital micrometer frame, comprising a base plate (1), a frame (3), a positioning pin (7), a positioning support (5), and a double-ended bolt (10), characterized in that: The base plate (1) is a rectangular metal plate; the positioning pin (7) is located on the bottom of the base plate (1); the positioning support (5) is fixed to the surface of the base plate (1); the positioning support (5) is provided with a positioning shaft (6) that cooperates with the ruler head hole of the ruler frame (3); one end of the double-headed bolt (10) is connected to the base plate (1), and the other end passes through the pressure plate (8); the double-headed bolt (10) is threadedly connected to the locking nut (9) to drive the pressure plate (8) to press the ruler frame (3); the double-headed bolt (10) is fitted with a compression spring (12); the compression spring (12) is located between the pressure plate (8) and the locking nut (9).

2. The positioning fixture for an electronic digital micrometer frame according to claim 1, characterized in that: The inner side of the ruler head of the ruler frame (3) is in contact with the shoulder end face of the positioning shaft (6); the positioning shaft (6) is used to limit the axial displacement of the ruler frame (3) and plays the role of cooperating with the positioning block (4) to radially position the ruler frame (3).

3. The positioning fixture for an electronic digital micrometer frame according to claim 1, characterized in that: The base plate (1) is provided with a leveling block (2); the leveling block (2) contacts the bottom of the ruler frame (3) and is used to assist in supporting the ruler frame (3).

4. The positioning fixture for an electronic digital micrometer frame according to claim 1, characterized in that: The base plate (1) is equipped with a support pin (11); the top of the support pin (11) contacts the lower surface of the pressure plate (8) to support the pressure plate (8) and prevent the pressure plate (8) from tilting, which would cause uneven force on the frame (3).

5. The positioning fixture for an electronic digital micrometer frame according to claim 1, characterized in that: The compression spring (12) is made of spring steel and can push the pressure plate (8) upward to reset when the locking nut (9) is loosened.

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