An asymmetric collet center distance detection device and method

Abstract

The application discloses a kind of center distance detection device and method of asymmetric embrace bullet mouth, for detecting the structure asymmetric embrace bullet mouth side wall and the distance size of cartridge center, let the positioning block of gauge seat be put to gauge seat, let the positioning block of gauge seat be put to gauge seat, and the positioning vertical surface of positioning block is adhered to the inner wall of cartridge insert on the action of spring force;Center positioning block is erected to the V-shaped groove formed by two positioning blocks, and the center of cartridge is lent to the two measuring surfaces of center positioning block, so that the two measuring surfaces form two measurement gaps with corresponding bullet mouth side wall;Two measurement gaps are detected by plug gauge respectively.Can quickly and accurately detect the result, and ensure the consistency of repeated detection results.

Description

Technical Field

[0001] This invention relates to the field of firearms technology, and in particular to a device and method for detecting the center distance of an asymmetric magazine nozzle. Background Technology

[0002] The key function of the distance between the side wall of the magazine opening and the center of the magazine is to ensure the reliability of the feeding.

[0003] The sidewall of the magazine catcher and the center of the magazine are mostly symmetrical. The width of the magazine catcher can be indirectly measured using special measuring tools. However, for inserts with thin inner walls that are easily deformed under stress, especially when the tolerance of the positioning part is greater than the tolerance of the measuring part, traditional measuring tools may produce inconsistent test results due to the influence of the positioning and fitting parts. For cases with thin walls, large positioning tolerances, and asymmetrical magazine catcher widths, coordinate measuring machines are often used for dimensional inspection. When the shape of the magazine catcher is a small plane or a circular cross-section, the results will vary depending on the position of the coordinate measuring machine points, affecting the consistency of the inspection and making it inconvenient for batch inspection on the production site. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a device and method for detecting the center distance of an asymmetrical magazine opening. This device is used to detect the distance between the side wall of the magazine opening and the center of the magazine, which has thin walls, large positioning dimensional tolerances, and asymmetrical structures. It can quickly and accurately detect the results and ensure the consistency of repeated detection results.

[0005] The objective of this invention is achieved as follows: A center distance detection device for asymmetric cartridge nozzles includes a gauge holder, a center positioning block, and a plug gauge. The measuring tool holder includes a guide rail (1-1), positioning blocks (1-2), a spring (1-3), and limiting screws (1-4). The guide rail (1-1) has a slide rail. There are two positioning blocks (1-2), and the lower ends of the two positioning blocks (1-2) are slidably engaged on the slide rail (1-1) and are symmetrically arranged. There are two limiting screws (1-4), and the two limiting screws (1-4) are fixed at both ends of the guide rail (1-1) to block the guide rail. At both ends of the slide rail (1-1), the spring (1-3) is set between two positioning blocks (1-2). The spring (1-3) is used to open the two positioning blocks (1-2). The opposite sides of the two positioning blocks (1-2) are parallel positioning surfaces. The positioning surfaces of the two positioning blocks (1-2) are used to fit the inner walls of the two sides of the magazine insert for positioning. The opposite surfaces of the two positioning blocks (1-2) are respectively provided with inclined surfaces. The inclined surfaces of the two positioning blocks (1-2) form a V-shaped groove. The two sides of the central positioning block are parallel vertical surfaces and serve as measuring surfaces. The central positioning block is provided with a V-shaped protrusion. The central positioning block has a symmetrical structure. The tilt angle of the V-shaped protrusion corresponds to the V-shaped groove. The V-shaped protrusion of the central positioning block is used to fit and position itself on the V-shaped groove, so that a measuring gap is formed between the measuring surface and the side wall of the cartridge opening. The plug gauge is used to detect the gap.

[0006] Preferably, two parallel springs (1-3) are provided between the two positioning blocks (1-2) so that the two ends of the positioning blocks (1-2) are evenly stressed.

[0007] Preferably, one end of the plug gauge is a through end and the other end is a stop end.

[0008] Preferably, one side of the plug gauge is a positioning plane, and one side of the plug gauge's go end and no-go end is located on this positioning plane. The positioning plane at the upper end of the plug gauge is used to fit against the measuring surface of the central positioning block for positioning, and the lower end of the plug gauge is used to detect the measuring gap.

[0009] A method for using an asymmetric bullet hole center distance detection device. First, place the magazine insert on the measuring tool base, and let the positioning surface of the positioning block (1-2) on the measuring tool base fit against the inner wall of the magazine insert under the action of spring force. Then, the center positioning block is placed on the V-shaped groove formed by the two positioning blocks (1-2), and the center of the magazine is extended to the two measuring surfaces of the center positioning block, so that the two measuring surfaces and the corresponding side wall of the magazine opening form two measuring gaps. Finally, the two measuring gaps were checked using plug gauges.

[0010] Due to the adoption of the above technical solution, the present invention has the following beneficial effects: This invention features a simple structure and principle, low cost, convenient use, high efficiency and accuracy in measurement, and good consistency in repeated measurement results. It can be widely promoted and applied, and has good economic and social benefits. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the measuring tool holder assembly of the present invention; Figure 2 This is a schematic diagram of the central positioning block of the present invention; Figure 3 This is a schematic diagram of the plug gauge of the present invention; Figure 4 This is a schematic diagram of the measured dimensions (on the magazine insert).

[0012] Figure Labels In the attached diagram, 1-1 is the guide rail, 1-2 is the positioning block, 1-3 is the spring, and 1-4 is the limit screw. Detailed Implementation

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0014] A center distance detection device for asymmetrical cartridge nozzles includes a measuring tool base, a center positioning block, and a plug gauge. The measuring tool base includes a guide rail 1-1, positioning blocks 1-2, springs 1-3, and limiting screws 1-4. The guide rail 1-1 has a slide rail. There are two positioning blocks 1-2, and the lower ends of the two positioning blocks 1-2 are slidably engaged on the slide rail 1-1 and symmetrically arranged. There are two limiting screws 1-4, and the two limiting screws 1-4 are fixed at both ends of the guide rail 1-1, blocking both ends of the slide rail 1-1. The springs 1-3 are arranged between the two positioning blocks 1-2 and are used to open the two positioning blocks 1-2. Two parallel springs 1-3 are arranged between the two positioning blocks 1-2 to make the two ends of the positioning blocks 1-2 evenly stressed. The opposite sides of the two positioning blocks 1-2 are parallel positioning surfaces. The positioning surfaces of the two positioning blocks 1-2 are used to fit the corresponding side wall of the shell-holding port for positioning. The facing surfaces of the two positioning blocks 1-2 are respectively provided with inclined surfaces, and the inclined surfaces of the two positioning blocks 1-2 form a V-shaped groove. The two sides of the central positioning block are parallel vertical surfaces and serve as measuring surfaces. The central positioning block is provided with a V-shaped boss. The central positioning block has a symmetrical structure. The tilt angle of the V-shaped boss corresponds to the V-shaped groove. The V-shaped boss of the central positioning block is used to fit and position itself on the V-shaped groove, so that a measuring gap is formed between the measuring surface and the side wall of the spring-loaded opening. The plug gauge is used to detect the measuring gap.

[0015] The plug gauge has a go end at one end and a stop end at the other end, forming a go / no-go gauge structure. One side of the plug gauge is a positioning plane, on which one side of the go and no-go ends is located. The positioning plane at one end of the plug gauge is used to position itself against the measuring surface of the central positioning block, while the other end of the plug gauge is used to detect the measurement gap.

[0016] In specific implementation, such as Figure 1 As shown, a device for detecting the distance between the side wall of a thin-walled asymmetric magazine opening and the center of the magazine includes a gauge base, a center positioning block, and a plug gauge.

[0017] The measuring tool holder consists of a guide rail 1-1, a positioning block 1-2, a spring 1-3, and a limiting screw 1-4. The width and height dimensions of the mating surfaces of the guide rail 1-1 and the positioning block 1-2 are customized by the designer, employing a small tolerance and micro-clearance fit. In this example, the tolerance is 0.003, the clearance is 0.003, and the surface roughness is Ra0.2, ensuring that the positioning block can translate between the guide rails without deflection. Two parallel springs 1-3 are installed between the two positioning blocks 1-2. In this example, ordinary cylindrical helical compression springs (YA 1×10×40 GB / T2089) are used. The ends of the springs are ground flat and tightly closed. The spring length and spring force are adjusted according to the part being measured, ensuring that the positioning block can fit tightly against the inner wall of the part being measured without deformation. One limiting screw is provided on each side of the positioning block 1-2 and the guide rail 1-1. In this example, M8×12 GB / T67 screws are used for simple and effective limiting of the two positioning blocks, ensuring that the positioning blocks will not pop out under the spring force.

[0018] The two positioning blocks 1-2 on the measuring tool holder have identical structures and, after assembly, form a centrally symmetrical V-groove. A central positioning block is mounted on the V-groove, and the V-shaped boss of the central positioning block is mounted on the V-groove. The angular dimensions of the V-groove and the V-shaped boss are defined by the designer, with high requirements for angular tolerance and surface finish; in example, the angular tolerance is ±5' and the surface finish is Ra0.2. Because the central positioning block is an axisymmetric figure, after the V-shaped structure is fitted, the center of the magazine cavity can be borrowed from the side wall of the central positioning block. The distance from the center of the central positioning block to the two side walls is defined by the designer, with high requirements for tolerance and surface finish; in example, the tolerance is 0.003 and the surface finish is Ra0.2.

[0019] After the central positioning block is mounted on the measuring tool holder, the two side walls of the central positioning block form measuring gaps with the side walls of the cartridge nozzle being measured. Finally, two plug gauges with identical structures are used to measure the size of the gaps. The dimensions of the plug gauges can be designed according to the design method of smooth limit gauges.

[0020] A method for detecting the distance between the sidewall of a thin-walled asymmetrical magazine catch and the center of the magazine: First, place the thin-walled magazine insert on a measuring tool base, allowing the positioning blocks 1-2 on the measuring tool base to fit tightly against both sides of the inner wall of the magazine insert under the action of spring force, but without excessive force causing deformation, ensuring accurate and reliable positioning. Then, place the center positioning block on the V-shaped groove formed by the two positioning blocks 1-2, extending the center of the magazine onto the two straight surfaces of the center positioning block, so that the straight surfaces on both sides form two measuring gaps with the sidewall of the magazine catch. Finally, use two plug gauges to detect the two measuring gaps respectively. During measurement, the upper straight surface of the plug gauge is pressed tightly against the center positioning block to ensure that the measuring tool can accurately measure the gaps on both sides. If the plug gauges pass through at the end and stop at the end on both sides, it indicates that the distance between the sidewall of the magazine catch and the center of the magazine meets the requirements.

[0021] Principle of this invention: In the testing device, the guide rail slider of the measuring tool seat and the positioning block are fitted with a small tolerance and micro clearance. Under the action of spring force, the positioning block can be tightly attached to the inner wall of the positioning cavity of the part being measured without deformation, thus ensuring accurate and reliable positioning.

[0022] After the V-shaped groove formed by the two positioning blocks on the measuring device's gauge seat mates with the axisymmetric center block, the center extends to both sides. The straight surfaces on both sides form measurement gaps with the two side walls of the part being measured. The gaps can then be accurately measured by using plug gauges to check the gaps.

[0023] The device of this invention effectively overcomes the influence of large tolerances and variability of the positioning parts of rigid measuring tools on the measurement results. It also overcomes the shortcomings of poor consistency of detection results due to different measurement points in three-coordinate measuring machines. It can perform detection efficiently and accurately in the production process, improving detection efficiency and ensuring product quality. Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A center distance detection device for asymmetric ammunition nozzles, characterized in that: Includes gauge holder, center locating block, and plug gauge. The measuring tool holder includes a guide rail, positioning blocks, springs, and limiting screws. The guide rail has a slide rail. There are two positioning blocks, the lower ends of which slide in contact with the slide rail and are symmetrically arranged. There are two limiting screws, which are fixed at both ends of the guide rail to block the slide rail. The spring is located between the two positioning blocks and is used to open the two positioning blocks. The opposite sides of the two positioning blocks are parallel positioning surfaces. The positioning surfaces of the two positioning blocks are used to fit against the inner walls of both sides of the magazine insert for positioning. The opposite surfaces of the two positioning blocks are respectively provided with inclined surfaces, and the inclined surfaces of the two positioning blocks form a V-shaped groove. The two sides of the central positioning block are parallel vertical surfaces and serve as measuring surfaces. The central positioning block is provided with a V-shaped protrusion. The central positioning block has a symmetrical structure. The tilt angle of the V-shaped protrusion corresponds to the V-shaped groove. The V-shaped protrusion of the central positioning block is used to fit and position itself on the V-shaped groove, so that a measuring gap is formed between the measuring surface and the side wall of the cartridge opening. The plug gauge is used to detect the gap.

2. The center distance detection device for asymmetric ammunition nozzles according to claim 1, characterized in that: Two parallel springs are installed between the two positioning blocks to ensure that the two ends of the positioning blocks are evenly stressed.

3. The center distance detection device for asymmetric ammunition nozzles according to claim 1, characterized in that: One end of the plug gauge is the go end, and the other end is the stop end.

4. The center distance detection device for asymmetric bullet hole according to claim 3, characterized in that: One side of the plug gauge is a positioning plane, and one side of the plug gauge's go end and no-go end is located on this positioning plane. The positioning plane at one end of the plug gauge is used to fit against the measuring surface of the central positioning block for positioning, and the other end of the plug gauge is used to detect the measuring gap.

5. A method of using the center distance detection device for asymmetric ammunition nozzles as described in claim 1, characterized in that: First, place the magazine insert on the measuring tool base, and let the positioning surface of the positioning block on the measuring tool base fit against the two sides of the inner wall of the magazine insert under the action of spring force. Then, the center positioning block is placed on the V-shaped groove formed by the two positioning blocks, and the center of the magazine is extended to the two measuring surfaces of the center positioning block, so that the two measuring surfaces and the corresponding magazine opening sidewalls form two measuring gaps. Finally, the two measuring gaps were checked using plug gauges.

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