Detection device and method for detecting the position and size of a gun body press-fit sleeve

Abstract

The present invention discloses a detection device for detecting the position size of a press-fitted sleeve of a gun body, comprising a base, a dial indicator seat, a measuring and positioning seat, a clamping and positioning device and a gun barrel positioning device, wherein a machine head body measuring head is sleeved in the measuring and positioning seat, a rotating handle is passed through the top, the rotating handle is connected to the machine head body measuring head, and drives the machine head body measuring head to rotate and move back and forth, a moving handle is provided at the rear, and a clamping slot is provided at the lower front end; a dial indicator is installed on the dial indicator seat, and its top is in contact with the rear end of the machine head body measuring head; the sleeve is arranged between the measuring and positioning seat and the clamping and positioning device, the rear end is placed in the large diameter hole of the stepped hole of the measuring and positioning seat, and the front end is pressed by the clamping and positioning device, a directional block is provided at the lower middle part of the sleeve, which cooperates with the clamping slot of the measuring and positioning seat to keep the center of gravity of the gun body stable; the clamping and positioning device is provided with a center hole along the axial direction, which is used for passing the gun barrel, and the gun barrel positioning device assists in positioning the center of the gun barrel. The present invention also discloses a detection method for detecting the position size of a press-fitted sleeve of a gun body.

Description

Technical Field

[0001] The invention belongs to the technical field of firearm quality detection, and relates to a detection device and a detection method for detecting the position and size of a press-fitted sleeve of a gun body. Background Art

[0002] The size of the distance between the gun body and the press-fit sleeve directly affects the qualified rate of the finished gun head selection, thereby reducing or even eliminating the probability of filing the gun head body. After eliminating the filing of the gun head body, while ensuring the appearance quality of the gun head body, the fitting area between the gun head body and the sleeve can be larger, thereby improving the life and reliability of the finished gun.

[0003] The detection method of the gun body press-fit sleeve distance is generally judged by the following criteria: the nose-shaped gauge rotates a corresponding angle from the measuring point of the sleeve locking screw to the longest dimension of the bullet-shaped gauge, and cannot enter the measured gap; and the nose-shaped gauge rotates a corresponding angle from the measuring point of the sleeve locking screw to the shortest dimension of the bullet-shaped gauge, and can enter the measured gap, and is judged to be qualified. This detection method can only qualitatively detect whether the measured element is within the qualified range, and because the locking screw is a 3mm screw, the rotation angle has little effect on the length. Therefore, the size of the manual rotation force is usually used to determine whether the nose-shaped measuring tool enters the measured gap. Since the size of the rotation force is difficult to determine, the measurement method is controversial.

[0004] The existing gauge for detecting the distance between the spiral measuring point of the sleeve and the bottom circle of the elastic gauge can only detect the size range by hand feeling, and cannot accurately detect the actual measured value of the distance between the locking spiral measuring point of the sleeve and the bottom circle of the elastic gauge.

[0005] Therefore, how to design an accurate and reliable detection device and method for detecting the position size of the gun body press-fitted sleeve, so as to quickly detect the actual parameter value of the distance size between the sleeve locking spiral measuring point and the bottom surface of the bullet gauge, is an urgent problem to be solved. Summary of the Invention

[0006] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a detection device and detection method for detecting the position size of the gun body press-fitted sleeve, which can accurately detect the actual measured value of the distance from the locking spiral measuring point of the sleeve to the bottom circle of the bullet gauge. Through the detection device, the machine head body measuring head is rotated by a fixed angle to ensure that the spiral measuring point of the machine head body measuring head and the spiral measuring point of the sleeve are on the same axis, and then the movable distance of the machine head body measuring head is read by moving the machine head body measuring head back and forth, thereby calculating the actual measured value of the measured element.

[0007] The object of the present invention is achieved like this:

[0008] A detection device for detecting the position dimensions of a cartridge sleeve pressed onto the gun body. The cartridge sleeve and the barrel form a barrel component. A bullet-shaped gauge is placed inside the barrel. It is characterized in that it includes a base, a dial indicator base, a measurement positioning base, a clamping positioning device, and a barrel positioning device that are fixedly installed on the base in sequence from back to front. A stepped hole is axially provided inside the measurement positioning base. A nose body measuring head is sleeved inside the stepped hole. An arc-shaped groove is provided at the top of the measurement positioning base. A rotating handle is radially penetrated inside the arc-shaped groove. The rotating handle extends into the measurement positioning base and is threadedly connected to the nose body measuring head, driving the nose body measuring head to rotate and move back and forth. A moving handle is further provided at the rear of the measurement positioning base along the radial direction of the nose body measuring head. After the nose body measuring head rotates, it penetrates into the measurement positioning base and the nose body measuring head to limit the position of the nose body measuring head after rotation. A card slot is further provided axially below the front end of the measurement positioning base. A dial indicator is horizontally installed on the dial indicator base. The top head of the dial indicator is always in contact with the rear end of the nose body measuring head, for measuring the moving distance of the nose body measuring head. The cartridge sleeve is arranged between the measurement positioning base and the clamping positioning device. The rear end of the cartridge sleeve is arranged inside the large-diameter hole of the stepped hole of the measurement positioning base, and the front end is pressed by the clamping positioning device, so that the outer circle and end face of the rear end of the cartridge sleeve are axially positioned by the large-diameter hole of the stepped hole of the measurement positioning base. A positioning block is provided below the middle of the cartridge sleeve, which cooperates with the card slot of the measurement positioning base to limit the circumferential direction of the cartridge sleeve and keep the center of gravity of the gun body stable. The clamping positioning device has a central hole axially for passing through the barrel. The barrel positioning device is used for auxiliary positioning of the barrel center. After the detection device positions and clamps the cartridge sleeve, the locking spiral center of the cartridge sleeve and the locking spiral center of the nose body measuring head are on the same straight line.

[0009] Further, the clamping positioning device includes a clamping positioning base and a clamping block. The clamping positioning base is fixedly installed with the base and axially limited by the base. The clamping block is sleeved inside the clamping positioning base and is threadedly matched with the clamping positioning base for pressing or loosening the cartridge sleeve.

[0010] Further, multiple barrel positioning devices are provided for positioning barrels of different lengths. Each barrel positioning device includes a positioning block, a guide rail positioning block, and a limiting block that are fixedly installed on the base in sequence from back to front. A U-shaped movable positioning block is also clamped in the middle of the guide rail positioning block for positioning the barrel. The movable positioning block is axially limited by the positioning block and the limiting block and radially limited by the guide rail positioning block. When the movable positioning block needs to be removed, the limiting block is removed from the base and the movable positioning block is taken out forward.

[0011] Further, the length between the spiral measurement point of the nose body measuring head and the front end face is a fixed value L1, and the distance between the bottom surface of the bullet-shaped gauge and the spiral measurement point of the cartridge sleeve is L2. L1 < L2, so that the nose body measuring head can enter the detected gap.

[0012] Furthermore, the front end of the machine body measuring head is provided with a locking helical tooth, the shape of which is determined according to the machine body shape of the gun body being tested, and has the same spiral measuring point, pitch and rotation direction as the machine body helical tooth.

[0013] Furthermore, the rotating handle drives the measuring head of the machine head body to rotate at an angle α, and the angle α is determined according to product requirements.

[0014] Furthermore, the movable handles are provided one by one and arranged radially.

[0015] The detection method for detecting the position and size of a press-fitted sleeve of a gun body of the present invention comprises the following steps:

[0016] Step 1: Obtain the aforementioned detection device to detect the position and size of the press-fit sleeve on the gun body;

[0017] Step 2: First, fix the dial indicator on the dial indicator base, place the bullet gauge into the barrel chamber of the gun body to be tested with the sleeve pressed in, and select the matching barrel positioning device according to the length of the gun body to be tested;

[0018] Step 3: Fix the gun body to be tested on the testing device, insert the gun barrel component into the center hole of the clamping and positioning device, place the sleeve of the gun barrel component between the measuring positioning seat and the clamping and positioning device, press the sleeve of the gun barrel component to be tested by the clamping and positioning device, and position the gun barrel by the gun barrel positioning device;

[0019] Step 4: Move the machine body measuring head forward by rotating the handle so that the machine body measuring head enters the gap to be detected, turn the rotating handle by α, and then insert the moving handle into the measurement positioning seat and the machine body measuring head to limit the rotation of the machine body measuring head;

[0020] Step 5: Push the rotary handle or the movable handle forward so that the front end of the measuring head of the machine body contacts the bottom surface of the bullet gauge, calibrate the dial indicator to zero, and then push the rotary handle backward so that the locking screw measuring point of the measuring head of the machine body contacts the locking screw measuring point of the sleeve body, and read the dial indicator reading;

[0021] Step 6: If the value of the dial indicator reading + the distance L1 from the spiral measuring point of the machine head measuring head to the front end face is within the product design requirements, the size of the press-fit position of the sleeve is determined to be qualified; otherwise, it is unqualified.

[0022] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0023] 1. The detection device of the present invention effectively overcomes the shortcomings of the existing method of using the manual rotation force to determine whether the head gauge has entered the measured gap. It can measure the actual value of the distance between the spiral measuring point of the sleeve and the bottom surface of the bullet gauge, and has high detection accuracy.

[0024] 2. When the sleeve is pressed onto the gun body, the position of the press-fitting sleeve can be selected based on the distance from the measuring point of the locking screw of the gun body to the base of the bullet (the distance from the measuring point of the locking screw of the sleeve to the bottom circle of the bullet gauge). This will improve the selection and matching rate of the gun body during assembly, eliminate the need for filing the gun body, and improve the service life and performance of the gun.

[0025] 3. During detection, the present invention rotates the machine body measuring head by a fixed angle to ensure that the spiral measuring point of the machine body measuring head and the spiral measuring point of the sleeve are on the same axis. Then, the movable distance of the machine body measuring head is read by moving the machine body measuring head back and forth, thereby calculating the actual measured value of the measured element. The detection method is more accurate and reliable.

[0026] 4. Multiple barrel positioning devices are fixedly installed on the base, which are suitable for positioning barrels of different lengths. When using one of the barrel positioning devices, it is only necessary to remove the movable positioning blocks of other barrel positioning devices without removing all parts, which reduces the workload of disassembly and reinstallation and improves detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a front view of the detection device;

[0028] Figure 2 is a top view of the detection device;

[0029] Figure 3 It is a right side view of the detection device;

[0030] Figure 4 yes Figure 2 Middle AA section view;

[0031] Figure 5 This is a schematic diagram of the structure of the press-fitting of the sleeve and the barrel;

[0032] Reference numerals

[0033] In the accompanying drawings, 1 is a dial indicator seat, 2 is a base, 3 is a measuring positioning seat, 4 is a rotating handle, 5 is a measuring head of the machine head body, 6 is a clamping positioning seat, 7 is a section sleeve, 8 is a clamping block, 9 is a positioning block, 10 is a guide rail positioning block, 11 is a movable positioning block, 12 is a limit block, 13 is a moving handle, 14 is a barrel, 15 is a dial indicator, 16 is a bullet gauge,

[0034] 301 is a stepped hole, 302 is a slot, 303 is an arc slot, and 701 is a directional block

[0035] B is the locking screw measuring point of the sleeve, and C is the locking screw measuring point of the machine head body. DETAILED DESCRIPTION

[0036] The embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

[0037] In the present invention, the shooting direction of the gun barrel is regarded as the front end.

[0038] See also Figure 1-Figure 5 A detection device for detecting the position and size of a press-fitted sleeve of a gun body, wherein the sleeve 7 and the barrel 14 are combined to form a barrel component, and a bullet-shaped gauge 16 is placed in the barrel 14. The shape and size of the bullet-shaped gauge 16 are the same as the bullet used in the firearm, comprising a base 2, a dial indicator base 1 fixedly mounted on the base 2 from back to front, a measuring positioning base 3, a clamping positioning device and a barrel positioning device, wherein a stepped hole 301 is provided in the axial direction of the measuring positioning base 3, and a head body measuring head 5 is provided in the stepped hole 301, and the head body measuring head 5 is connected to the measuring head 5. The matching clearance of the stepped hole 301 of the positioning seat is 0.003, which ensures that the machine head body measuring head 5 can flexibly rotate and move back and forth in the measuring positioning seat 3. The top of the measuring positioning seat is provided with an arc groove 303, and a rotating handle 4 is radially penetrated in the arc groove 303. The rotating handle 4 extends into the measuring positioning seat 3 and is threadedly connected to the machine head body measuring head 5, driving the machine head body measuring head 5 to rotate and move back and forth. The rear part of the measuring positioning seat 3 is also provided with a moving handle 13 along the radial direction of the machine head body measuring head 5, which is used to penetrate the measuring positioning seat 3 after the machine head body measuring head 5 rotates. And the machine head body measuring head 5, the position of the machine head body measuring head 5 after rotation is limited to limit its rotational freedom, and a card slot 302 is also provided axially below the front end of the measuring positioning seat 3; a dial indicator 15 is installed laterally on the upper edge of the dial indicator seat 1, and the top of the dial indicator 15 is always in contact with the rear end of the machine head body measuring head 5, which is used to measure the moving distance of the machine head body measuring head 5; the section sleeve 7 is arranged between the measuring positioning seat 3 and the clamping positioning device, and the rear end of the section sleeve 7 is arranged in the large diameter hole of the measuring positioning seat stepped hole 301, and the front end is clamped by the clamping positioning device. The positioning device is tightened so that the outer circle and end face of the rear end of the sleeve are axially positioned through the large diameter hole of the stepped hole 301 of the measuring and positioning seat. A directional block 701 is provided at the lower middle part of the sleeve 7, which cooperates with the slot 302 of the measuring and positioning seat to limit the circumferential position of the sleeve 7; the clamping and positioning device is provided with a center hole along the axial direction for passing the barrel component 14, and the barrel positioning device positions the barrel 14 to keep the center of gravity of the barrel component stable. After the detection device positions and clamps the sleeve, the center of the locking spiral of the sleeve and the center of the locking spiral of the measuring head of the machine head body are located on the same straight line.

[0039] In this embodiment, the clamping and positioning device includes a clamping and positioning seat 6 and a clamping block 8. The clamping and positioning seat 6 is fixedly installed with the base 2 and is axially limited by the base 2. The clamping block 8 is sleeved in the clamping and positioning seat 6 and is threadedly matched with the clamping and positioning seat 6. The clamping block 8 can be tightened or loosened by rotating the clamping block 8 with a wrench.

[0040] In this embodiment, a plurality of barrel positioning devices are provided for positioning barrels 14 of different lengths. Each barrel positioning device includes a positioning block 9, a guide rail positioning block 10, and a limit block 12 that are fixedly installed on the base in sequence from the rear to the front. A U-shaped movable positioning block 11 is also clamped in the middle of the guide rail positioning block 10 for positioning the barrel 14. The movable positioning block 11 is axially limited by the positioning block 9 and the limit block 12, and radially limited by the guide rail positioning block 10. When using one of the barrel positioning devices for detection, only the movable positioning blocks 11 of the other barrel positioning devices need to be removed, the limit blocks 12 are removed from the base 2, and the movable positioning blocks 11 are taken out forward, without removing all the parts, reducing the workload of disassembly and reinstallation, and improving the detection efficiency.

[0041] In this embodiment, the length between the spiral measurement point of the head body measuring head 5 and the front end face is a fixed value L1, and the distance between the bottom surface of the bullet-shaped gauge 16 and the spiral measurement point of the bushing is L2. The L1 < L2, so that the head body measuring head can enter the detected gap, and the detected gap refers to the distance L2 from the bottom surface of the bullet-shaped gauge 16 to the spiral measurement point of the bushing.

[0042] In this embodiment, the front end of the head body measuring head 5 is provided with locking spiral teeth, and the shape of the spiral teeth is determined according to the shape of the head body of the detected gun body, and is the same as the spiral measurement point, pitch, and helix direction of the spiral teeth of the head body.

[0043] The angle α by which the rotary handle 4 drives the head body measuring head 5 to rotate is determined according to product requirements. In this embodiment, the angle α by which the head body measuring head 5 rotates is 30°. After rotating in place, the moving handle 13 is inserted into the head body measuring head 5 and the measuring positioning seat 3 to limit the rotational freedom of the head body measuring head 5. The moving handle 13 is arranged radially.

[0044] The detection method for detecting the position dimension of the press-fitted bushing of the gun body according to the present invention includes the following steps:

[0045] Step 1: Use the aforementioned detection device to detect the position dimension of the press-fitted bushing of the gun body;

[0046] Step 2: First, fix the dial indicator on the dial indicator base, place the bullet-shaped gauge into the barrel chamber of the detected gun body with the press-fitted bushing, and select a matching barrel positioning device according to the length of the barrel of the detected gun body;

[0047] Step 3: Fix the detected gun body on the detection device, insert the barrel component into the central hole of the clamping and positioning device, place the bushing of the barrel component between the measuring positioning seat and the clamping and positioning device, press the bushing of the detected barrel component through the clamping and positioning device, and the barrel positioning device positions the barrel;

[0048] Step 4: Move the machine body measuring head forward by rotating the handle so that the machine body measuring head enters the gap to be detected, turn the rotating handle 30°, and then insert the moving handle into the measurement positioning seat and the machine body measuring head to limit the rotation of the machine body measuring head;

[0049] Step 5: Push the rotary handle or the movable handle forward so that the front end of the measuring head of the machine body contacts the bottom surface of the bullet gauge, calibrate the dial indicator to zero, and then push the rotary handle or the movable handle backward so that the locking screw measuring point of the measuring head of the machine body contacts the locking screw measuring point of the sleeve body, and read the dial indicator reading;

[0050] Step 6: If the value of the dial indicator reading + the distance L1 from the spiral measuring point of the machine head measuring head to the front end face is within the product design requirements, the size of the press-fit position of the sleeve is determined to be qualified; otherwise, it is unqualified.

[0051] When using the detection device of the present invention to detect other types of gun bodies, such as precision rifles, select a matching barrel positioning device and remove the movable positioning block on the other barrel positioning device. The detection method and judgment method are the same as when detecting rifles.

[0052] The detection device of the present invention effectively overcomes the shortcomings of the existing method of using the size of the manual rotation force to determine whether the machine head shaped measuring tool enters the measured gap. It measures the actual measured value of the distance between the spiral measuring point of the sleeve and the bottom surface of the bullet-shaped gauge, and has high detection accuracy. When the sleeve is pressed, the position of the press-fit gun body sleeve (the distance from the locking spiral measuring point of the sleeve to the bottom surface circle of the bullet-shaped gauge) can be selected according to the distance from the locking spiral measuring point of the machine head body to the bullet base, thereby improving the machine head body selection qualification rate when assembling the finished gun, eliminating the filing of the machine head body, and improving the service life and performance of the finished gun.

[0053] 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 limiting. 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 in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A detection device for detecting the position and size of a press-fitted sleeve on a gun body, wherein the sleeve and the gun barrel are combined to form a gun barrel component, and a bullet-shaped gauge is placed in the gun barrel, characterized in that: It includes a base, a dial indicator base, a measuring and positioning base, a clamping and positioning device, and a barrel positioning device that are fixedly installed on the base in sequence from back to front. A stepped hole is axially provided in the measuring and positioning base, and a head body measuring head is sleeved in the stepped hole. An arc-shaped groove is provided at the top of the measuring and positioning base, and a rotating handle is radially penetrated in the arc-shaped groove. The rotating handle extends into the measuring and positioning base and is threadedly connected to the head body measuring head, driving the head body measuring head to rotate and move back and forth. A moving handle is further provided at the rear of the measuring and positioning base along the radial direction of the head body measuring head. After the head body measuring head rotates, it penetrates into the measuring and positioning base and the head body measuring head to limit the position of the head body measuring head after rotation. A clamping groove is also axially provided below the front end of the measuring and positioning base; A dial indicator is horizontally installed on the dial indicator base, and the top head of the dial indicator is always in contact with the rear end of the head body measuring head, used to measure the moving distance of the head body measuring head; The sleeve is arranged between the measuring and positioning base and the clamping and positioning device. The rear end of the sleeve is arranged in the large-diameter hole of the stepped hole of the measuring and positioning base, and the front end is pressed by the clamping and positioning device, so that the outer circle and end face of the rear end of the sleeve are axially positioned by the large-diameter hole of the stepped hole of the measuring and positioning base. A directional block is provided below the middle of the sleeve, which cooperates with the clamping groove of the measuring and positioning base to limit the circumferential direction of the sleeve and keep the center of gravity of the gun body stable; The clamping and positioning device is axially provided with a central hole for penetrating the barrel. The barrel positioning device is used for auxiliary positioning of the barrel center. After the detection device positions and clamps the sleeve, the locking spiral center of the sleeve and the locking spiral center of the head body measuring head are on the same straight line; The length between the spiral measuring point of the head body measuring head and the front end face is a fixed value L1, and the distance between the bottom surface of the bullet-shaped gauge and the spiral measuring point of the sleeve is L2. The L1 < L2, so that the head body measuring head can enter the detected gap; The front end of the head body measuring head is provided with locking spiral teeth, and the shape of the spiral teeth is determined according to the shape of the head body of the detected gun body, and is the same as the spiral measuring point, pitch, and helix direction of the head body spiral teeth.

2. The detection device for detecting the position and size of the press-fit sleeve of a gun body according to claim 1, characterized in that: The clamping and positioning device includes a clamping and positioning seat and a clamping block. The clamping and positioning seat is fixedly installed on the base and axially limited by the base. The clamping block is sleeved in the clamping and positioning seat and is threadedly matched with the clamping and positioning seat, used to press or loosen the sleeve.

3. The detection device for detecting the position and size of the press-fit sleeve of a gun body according to claim 1, characterized in that: A plurality of barrel positioning devices are provided, used to position barrels of different lengths. Each barrel positioning device includes a positioning block, a guide rail positioning block, and a limiting block that are fixedly installed on the base in sequence from back to front. A U-shaped movable positioning block is also clamped in the middle of the guide rail positioning block, used to position the barrel. The movable positioning block is axially limited by the positioning block and the limiting block, and radially limited by the guide rail positioning block. When the movable positioning block needs to be removed, the limiting block is removed from the base and the movable positioning block is taken out forward.

4. The detection device for detecting the position and size of a press-fit sleeve of a gun body according to claim 1, characterized in that: The angle α by which the rotating handle drives the head body measuring head to rotate is determined according to product requirements.

5. The detection device for detecting the position and size of the press-fit sleeve of a gun body according to claim 1, characterized in that: One moving handle is provided and arranged radially.

6. A method for detecting the position and size of a press-fit sleeve of a gun body, characterized in that: It includes the following steps: Step 1: Use the detection device as described in any one of claims 1 to 5 to detect the position dimensions of the gun body when pressing the sleeve; Step 2: First, fix the dial indicator on the dial indicator base, place the bullet gauge into the barrel chamber of the gun body to be tested with the sleeve pressed in, and select the matching barrel positioning device according to the length of the gun body to be tested; Step 3: Fix the gun body to be tested on the testing device, insert the gun barrel component into the center hole of the clamping and positioning device, place the sleeve of the gun barrel component between the measuring positioning seat and the clamping and positioning device, press the sleeve of the gun barrel component to be tested by the clamping and positioning device, and position the gun barrel by the gun barrel positioning device; Step 4: Move the machine body measuring head forward by rotating the handle so that the machine body measuring head enters the gap to be detected, turn the rotating handle by α, and then insert the moving handle into the measurement positioning seat and the machine body measuring head to limit the rotation of the machine body measuring head; Step 5: Push the rotary handle or the movable handle forward so that the front end of the measuring head of the machine body contacts the bottom surface of the bullet gauge, calibrate the dial indicator to zero, and then push the rotary handle or the movable handle backward so that the locking screw measuring point of the measuring head of the machine body contacts the locking screw measuring point of the sleeve body, and read the dial indicator reading; Step 6: If the value of the dial indicator reading + the distance L1 from the spiral measuring point of the machine head measuring head to the front end face is within the product design requirements, the size of the press-fit position of the sleeve is determined to be qualified; otherwise, it is unqualified.

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