Automatic clamping structure and control method of a nose body

Abstract

The application discloses an automatic clamping structure and control method of a machine head body, which can automatically clamp the machine head body, is convenient to operate, is high in measuring efficiency and realizes multi-directional detection of the contour size of the machine head body. The automatic clamping structure of the machine head body comprises two rotary motors (11) arranged adjacently, a rotary measuring clamp (8) is arranged on one of the rotary motors (11), the rotary measuring clamp (8) can rotate by 360 degrees, and a small-head detection clamp (9) and a large-head integrated detection clamp (10) are symmetrically arranged on the other rotary motor (11), so that the large-head integrated detection clamp (10) and the small-head detection clamp (9) can exchange positions, and the rotary measuring clamp (8), the small-head detection clamp (9) and the large-head integrated detection clamp (10) are used for clamping the machine head body.

Description

Technical Field

[0001] This invention relates to the field of firearms technology, and in particular to an automatic clamping structure and control method for a bolt head. Background Technology

[0002] The bolt head is a crucial core component of the finished rifle, playing a vital role in the locking of the cartridge. The shape, dimensions, and quality of the bolt head directly affect the assembly quality of the automatic mechanism, thus impacting the rifle's performance in feeding, locking, and ejection. For example... Figure 1 As shown, the external dimensions of the machine head need to be measured. Currently, conventional measurements are taken manually using measuring tools. These tools are numerous and varied, making the measurements complex and resulting in poor consistency in repeated measurements. This method is not suitable for mass production testing. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide an automatic clamping structure and control method for the machine head body, which can automatically clamp the machine head body, is easy to operate, has high measurement efficiency, and realizes multi-directional detection of the machine head body's external dimensions.

[0004] The objective of this invention is achieved as follows:

[0005] An automatic clamping structure for a machine head includes two adjacent rotary motors (11). One rotary motor (11) is equipped with a rotary measuring fixture (8) that can rotate 360°. The other rotary motor (11) is symmetrically equipped with a small-head detection fixture (9) and a large-head integrated detection fixture (10) that can exchange positions. The rotary measuring fixture (8), the small-head detection fixture (9), and the large-head integrated detection fixture (10) are used to clamp the machine head.

[0006] Preferably, the rotary measuring fixture (8) and the large-head integrated detection fixture (10) are both C-shaped frames. The lower end of the rotary measuring fixture is provided with a fixed center, and the upper end of the rotary measuring fixture is provided with a movable center that can move up and down. The middle of the rotary measuring fixture is provided with a light-transmitting hole for the CCD detection mechanism to detect. The fixed center and movable center of the rotary measuring fixture are coaxial with the corresponding rotary motor (11). The small-head detection fixture (9) is provided with a positioning pin, which is used to insert into the shaft hole on the large head of the machine head to position the machine head. The upper end of the large-head integrated detection fixture (10) is provided with a fixed center, and the lower end of the large-head integrated detection fixture (10) is provided with a movable center that can move up and down.

[0007] Preferably, a positioning part is provided on one side of the movable tip of the rotary measuring fixture, and the positioning part is used to cooperate with the positioning groove on the large head of the machine head to position the machine head in the circumferential direction.

[0008] Preferably, a compression spring is provided between the movable tip of the rotary measuring fixture and the upper end of the rotary measuring fixture, so that the movable tip of the rotary measuring fixture can fit with the shaft hole on the large head of the machine head body through the spring force. A connecting rod is provided at the upper end of the movable tip of the rotary measuring fixture. The connecting rod extends out of the upper end of the rotary measuring fixture and is fixedly connected to the detection handwheel (14). The detection handwheel (14) is used to lift the movable tip of the rotary measuring fixture and pick up and put down the machine head body.

[0009] Preferably, the fixture includes a clamping mechanism (3), which includes a pull block (15), a Z-direction cylinder (16), an X-direction cylinder (18), and a clamping bracket (20). The pull block (15) is C-shaped, and the lower end of the pull block (15) is provided with a bayonet for engaging with the detection handwheel (14). The pull block (15) is mounted on the Z-direction cylinder (16), which is used to drive the pull block (15) to move upward. The pull block (15) pulls the detection handwheel (14) of the rotating fixture (8) to release the positioning clamped head body (34). The Z-direction cylinder (16) is mounted on the X-direction cylinder (18), which is used to drive the pull block (15) to move horizontally to engage with the detection handwheel (14). The X-direction cylinder (18) is connected to the clamping bracket (20).

[0010] Preferably, the lower end of the movable tip of the large-head integrated testing fixture (10) is connected to the lower positioning block (40), the movable tip slides with the large-head integrated testing fixture (10), the lower end of the large-head integrated testing fixture (10) is provided with a relief groove, the relief groove corresponds to the lower positioning block (40), and the relief groove is for the pressure block (22) to extend into;

[0011] It also includes a clamp pressing mechanism, which includes a pressing block (22), a Y-direction cylinder (23), a Z-direction cylinder (24), and a clamp pressing bracket (28). The pressing block (22) is mounted on the Z-direction cylinder (24), and the pressing block (22) is provided with a snap-fit ​​structure. The Z-direction cylinder (24) is used to drive the pressing block (22) to press down the lower positioning block (40) of the large-head integrated detection clamp (10) and release the machine head body (34). The Z-direction cylinder (24) is mounted on the Y-direction cylinder (23), and the Y-direction cylinder (23) is used to drive the pressing block (22) to move horizontally to snap-fit ​​with the lower positioning block (40). The Y-direction cylinder (23) is connected to the clamp pressing bracket (28).

[0012] Preferably, the device also includes a transplanting mechanism, which includes an X-direction electric cylinder (31), a Y-direction electric cylinder (30), a Z-direction electric cylinder (35), a pneumatic gripper (33), a vertical plate (36), and a base plate (39). The pneumatic gripper (33) is mounted on the Z-direction electric cylinder (35). The pneumatic gripper (33) performs transplanting by gripping the middle rod of the machine head body (34), installing the machine head body onto the rotating measuring fixture (8), or removing the machine head body from the rotating measuring fixture (8). The Z-direction electric cylinder is mounted on the vertical plate (36), which is connected to the X-direction electric cylinder (31). The X-direction electric cylinder (31) is mounted on the Y-direction electric cylinder (30), and the Y-direction electric cylinder (30) is mounted on the base plate (39).

[0013] Preferably, two rotary motors (11), a clamp pull-up bracket (20), a clamp press-down bracket (28), and a base plate (39) are mounted on the same base.

[0014] A control method for an automatic clamping structure of a machine head body.

[0015] The machine head body is manually positioned and clamped on the rotary measuring fixture for measuring the axial shape and radial depth dimensions. During the measurement process, the corresponding rotary motor drives the rotary measuring fixture to rotate 360° to complete the all-round inspection of the axial shape of the machine head body.

[0016] The pneumatic gripper of the transplanting mechanism holds the rod of the machine head body. Then, the pull block of the clamping mechanism pulls the detection handwheel of the rotary measuring clamp upward. At this time, the Z-direction electric cylinder of the transplanting mechanism drives the pneumatic gripper to lift upward. Then, the X-direction electric cylinder moves backward, driving the machine head body away from the positioning position of the rotary measuring clamp. Next, the Y-direction electric cylinder of the transplanting mechanism drives the machine head body to move to the front of the large-head integrated detection clamp. At this time, the Y-direction cylinder of the clamping mechanism drives the pressure block to move to the position of the lower positioning block of the large-head integrated detection clamp. The Z-direction cylinder drives the pressure block to press down the lower positioning block. Then, the X-direction electric cylinder of the transplanting mechanism drives the pneumatic gripper to send the machine head body to the axial positioning vertical surface of the large-head integrated detection clamp and lifts it upward to press against the top of the clamp. Then, the pressure block of the clamping mechanism lifts up, and the lower positioning block of the large-head integrated detection clamp rises to press against the lower end of the machine head body, completing the positioning and clamping of the machine head body for measuring the external dimensions of the large-head end face of the machine head body.

[0017] The clamp pressing mechanism presses down the lower positioning block of the large-head integrated inspection clamp, and the transplanting mechanism clamps the head body rod and moves it downward, away from the positioning block, and moves it to the front of the small-head clamp. At this time, the pneumatic gripper rotates 180° to complete the head body turning and places the head body on the small-head clamp for the inspection of the small-head end face size of the head body.

[0018] Due to the adoption of the above technical solution, the present invention has the following beneficial effects:

[0019] This invention employs a specialized clamp with a motor mounted at the bottom to position and clamp the head body, allowing it to rotate 360°. A translation mechanism then moves the head body to the detection positions of each CCD detection unit, enabling the detection of the head body's axial dimensions, beveled hole dimensions, and radial depth dimensions. Furthermore, a clamping mechanism, a clamping mechanism, and a transfer mechanism facilitate the transfer and repositioning of the head body between the clamps, enabling the detection of the large and small end faces of the head body. This improves detection efficiency and reduces the labor intensity of manual inspection. Attached Figure Description

[0020] Figure 1 It is a schematic diagram of the external structure of the measured machine head body;

[0021] Figure 2 This is a schematic diagram of the structure of the present invention;

[0022] Figure 3 This is a schematic diagram of the translation mechanism;

[0023] Figure 4 This is a schematic diagram of the clamp pull-up mechanism;

[0024] Figure 5 This is a schematic diagram of the clamp pressing mechanism;

[0025] Figure 6 This is a schematic diagram of the transplanting mechanism;

[0026] Figure 7 This is a schematic diagram showing the position of the lower positioning block of the large-head integrated testing fixture;

[0027] Figure 8 This is a schematic diagram of a rotary measuring fixture;

[0028] Figure 9 This is a schematic diagram of a small-head inspection fixture.

[0029] Figure Labels

[0030] In the attached diagram, 1-translation mechanism; 2-second CCD detection mechanism; 3-clamp pull-up mechanism; 4-third CCD detection mechanism; 5-clamp pressing down mechanism; 6-transfer mechanism; 7-first CCD detection mechanism; 8-rotary measuring clamp; 9-small-end detection clamp; 10-large-end integrated detection clamp; 11-motor; 12-electric cylinder; 13-drag chain; 14-rotary handwheel; 15-pulling block; 16-Z-direction cylinder; 17-small connecting plate; 18-X-direction cylinder; 19-large connecting plate; 20-vertical plate; 2 1-Base plate; 22-Pressure block; 23-Y-direction cylinder; 24-Z-direction cylinder; 25-Reinforcing plate; 26-Laser sensor; 27-Connecting plate; 28-Vertical plate; 29-Base; 30-Y-direction electric cylinder; 31-X-direction electric cylinder; 32-Backlight panel; 33-Pneumatic gripper; 34-Head unit; 35-Z-direction electric cylinder; 36-Vertical plate; 37-Connecting plate; 38-Drag chain; 39-Base plate; 40-Lower positioning block; 41-Base; 42-Allowing groove; 81-Compression spring; 82-Positioning part. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] like Figure 2 The embodiment shown is an automatic clamping structure for the head body. In this embodiment, the detection is carried out by a translation mechanism 1, which moves the clamp to the side of the three CCD detection mechanisms for detection.

[0033] This embodiment includes a translation mechanism 1, a second CCD detection mechanism 2, a clamp pull-up mechanism 3, a third CCD detection mechanism 4, a clamp press-down mechanism 5, a transfer mechanism 6, a first CCD detection mechanism 7, and a base 41. The translation mechanism 1 serves as the loading / unloading and moving detection module for the machine head body 34. After the machine head body 34 is positioned and clamped by a dedicated clamp that can rotate 360°, it moves and measures omnidirectionally through each CCD detection mechanism. The clamp pull-up mechanism 3, the clamp press-down mechanism 5, and the transfer mechanism 6 enable the transfer and turning of the machine head body 34, completing automated detection of its end face, axial direction, radial depth, and other external dimensions, improving detection efficiency and reducing the labor intensity of manual detection. The first CCD detection mechanism is installed on the left side of the translation mechanism, using a CCD industrial camera to detect the external dimensions of small holes on the side of the machine head body. The second CCD detection mechanism is installed on the right side of the translation mechanism, using a CCD industrial camera and a 3D scanner to detect the axial vertical plane external dimensions and radial depth dimensions of the machine head body. The third CCD detection mechanism is installed on the upper right of the translation mechanism, using a CCD industrial camera to detect the dimensions of the large and small end faces of the machine head. The clamping pull-up mechanism is installed in the middle of the second CCD detection mechanism. Pulling the rotating measuring clamp's detection handwheel with the pull block releases the machine head, facilitating gripping by the transfer mechanism's jaws and enabling the transfer of the machine head. The clamping pull-down mechanism is installed at the end of the translation mechanism. Pressing down the lower positioning block of the large-head integrated detection clamp with a pressure block loosens the machine head, facilitating gripping by the transfer mechanism's jaws and enabling the transfer of the machine head. The transfer mechanism is installed on the upper left of the translation mechanism. Pneumatic jaws clamp the machine head at the rod end, and X, Y, and Z direction electric cylinders drive the pneumatic jaws to move in the X, Y, and Z directions, enabling the transfer and repositioning of the machine head within each detection clamp.

[0034] like Figure 3 The translation mechanism 1 shown includes a rotary measuring fixture 8, a small-end detection fixture 9, a large-end integrated detection fixture 10, a rotary motor 11, an electric cylinder 12, and a cable chain 13 (moving in conjunction with the electric cylinder). The rotary measuring fixture 8 is mounted on the rotary motor 11 and can rotate 360°, facilitating axial omnidirectional dimensional measurement of the machine head body 34. The large-end integrated detection fixture 10 and the small-end detection fixture 9 are mounted on the rotary motor 11, facilitating the measurement of the dimensional features of both end faces of the machine head body 34. The rotary motor is mounted on the electric cylinder 12, which drives the detection fixtures to move, completing the movement and measurement of the machine head body 34 between the various CCD detection mechanisms. The electric cylinder 12 and the cable chain 13 are mounted on the base 41. The upper end of the large-end integrated detection fixture 10 is narrower, with the detection area exposed at the top. The rotary measuring fixture, the large-end integrated detection fixture, and the small-end detection fixture are connected to the motor via an upper base plate, and the motor is connected to the electric cylinder via a lower base plate.

[0035] The first CCD inspection unit 7, the second CCD inspection unit 2, and the third CCD inspection unit 4 use CCD industrial cameras and 3D scanners, which are installed on the base 41 and are responsible for multi-dimensional digital inspection of the external dimensions of the machine head 34.

[0036] like Figure 4 The clamping pull-up mechanism shown includes a pull block 15, a Z-direction cylinder 16, a small connecting plate 17, an X-direction cylinder 18, a large connecting plate 19, a clamping pull-up bracket 20, and a base plate 21. The pull block 15 is mounted on the Z-direction cylinder 16. The Z-direction cylinder 16 drives the pull block 15 to pull the detection handwheel 14 of the rotating clamp 8, releasing the clamped head body 34 and facilitating the transfer mechanism 6 to transfer the head body 34 between the detection clamps. The Z-direction cylinder 16 is mounted on the X-direction cylinder 18 via the small connecting plate 17. The X-direction cylinder 18 is connected to the clamping pull-up bracket 20 via the large connecting plate 19. The clamping pull-up bracket 20 is connected to the base plate 21 and mounted on the base 41.

[0037] like Figure 5 The clamp pressing mechanism shown includes a pressing block 22, a Y-direction cylinder 23, a Z-direction cylinder 24, a reinforcing plate 25, a laser sensor 26, a connecting plate 27, a clamp pressing bracket 28, and a base plate 29. The pressing block 22 is mounted on the Z-direction cylinder 24, which drives the pressing block 22 to press down the lower positioning block 40 of the large-head integrated detection clamp 10, releasing the machine head body 34, facilitating the transplanting mechanism 6 to transplant and turn the machine head body 34. The Z-direction cylinder 24 and the Y-direction cylinder 23 are connected by the connecting plate 27, the reinforcing plate 25 is mounted on the connecting plate 27, and the laser displacement sensor 26 is mounted on the reinforcing plate 25, which can identify and judge the positioning status of the machine head body 34. The Y-direction cylinder 23 is connected to the clamp pressing bracket 28 through the connecting plate 27, and the clamp pressing bracket 28 is connected to the base plate 29 and mounted on the base 41.

[0038] like Figure 6 The transplanting mechanism shown includes a Y-axis electric cylinder 30 (translation mechanism direction), an X-axis electric cylinder 31, a backlight panel 32, a pneumatic gripper 33, a Z-axis electric cylinder 35 (vertical), a vertical plate 36, a connecting plate 37, and a base plate 39. The backlight panel 32 and the pneumatic gripper 33 (using a rotating gripper) are mounted on the Z-axis electric cylinder 35 via the connecting plate 37. The three electric cylinders are used for three-axis movement, performing transplanting and turning by gripping the rod of the machine head body 34. The Z-axis electric cylinder is mounted on the vertical plate 36, which is connected to the X-axis electric cylinder 31. The X-axis electric cylinder 31 is mounted on the Y-axis electric cylinder 30, which is mounted on the base plate 39. A cable chain 38 is mounted on the connecting plate 37 and the base plate 39, and the base plate 39 is mounted on the base 41.

[0039] The measurement process of this invention:

[0040] First, the machine head body is manually positioned and clamped on the rotary measuring fixture. The servo electric cylinder of the translation mechanism drives the rotary fixture to the first CCD detection position to measure the size of the inclined surface and inclined hole. After the measurement is completed, it moves to the second CCD detection position to measure the axial shape and radial depth. During the measurement process, the rotary motor drives the rotary measuring fixture to rotate 360° to complete the axial all-round detection of the machine head body. After the second CCD test is completed, the pneumatic gripper of the transplanting mechanism holds the rod of the machine head body. Then, the pull block of the clamping mechanism pulls the rotating handwheel of the rotating measuring clamp upward. At this time, the Z-direction electric cylinder of the transplanting mechanism drives the pneumatic gripper to lift upward, and then the X-direction electric cylinder moves backward, driving the machine head body away from the positioning position of the rotating measuring clamp. Next, the Y-direction electric cylinder of the transplanting mechanism drives the entire machine head body to move in front of the large-head integrated testing clamp. At this time, the Y-direction cylinder of the clamping mechanism drives the pressure block to move to the position of the lower positioning block of the large-head integrated testing clamp. The Z-direction cylinder drives the pressure block to press down the lower positioning block. Then, the X-direction electric cylinder of the transplanting mechanism drives the pneumatic gripper to send the entire machine head body to the axially positioned vertical position of the large-head integrated testing clamp. The machine head body is positioned and clamped. Then, the clamping mechanism lowers the pressure block, and the lower positioning block of the large-head integrated testing fixture rises to press against the lower end of the machine head body, completing the positioning and clamping of the machine head body. Then, the third CCD testing mechanism measures the external dimensions of the large-head end face of the machine head body. After the measurement is completed, the clamping mechanism lowers the lower positioning block of the large-head integrated testing fixture downwards. The transfer mechanism clamps the rod of the machine head body, moves it downwards, away from the positioning, and moves it to the front of the small-head fixture. At this time, the pneumatic gripper rotates 180° to complete the machine head body reversal and places the machine head body on the small-head fixture. The third CCD measures the dimensions of the small-head end face of the machine head body. After the measurement is completed, the translation mechanism moves the measuring fixture to the manual unloading position for manual unloading.

[0041] This invention enables the detection fixture to move and measure between various CCD detection mechanisms via a translation mechanism, and achieves the transfer and repositioning of the machine head body through a fixture pull-up mechanism, a fixture press-down mechanism, and a transfer mechanism, thus completing automated multi-directional detection of the machine head body's external dimensions. This improves detection efficiency and reduces the labor intensity of manual detection.

[0042] The present invention is not limited to the above embodiments. The automatic clamping structure of the machine head body in the present invention can also be used for detection in other ways. For example, two rotary motors 11, clamp pull-up bracket 20, clamp press-down bracket 28, and base plate 39 are fixedly installed on the base, and detection is carried out by each moving CCD detection mechanism.

[0043] The present invention is not limited to the above embodiments. The automatic clamping structure of the machine head body in the present invention can also be used for testing in other ways. For example, two rotary motors 11, clamp pull-up bracket 20, clamp press-down bracket 28, and base plate 39 are fixedly installed on the base and tested manually.

[0044] The present invention is not limited to the above embodiments. The automatic clamping structure of the machine head body in the present invention can also be used for detection in other ways. For example, two rotary motors 11, clamp pull-up bracket 20, clamp press-down bracket 28, and base plate 39 are fixedly installed on the base. Each rotary motor 11 corresponds to a station. Each station can achieve multiple detection items by replacing the CCD detection mechanism (the installation position of the CCD detection mechanism is the same, and the position is controlled by screws or other means).

[0045] 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. An automatic clamping structure for a machine head body, characterized in that, It includes two adjacent rotary motors (11), one of which is equipped with a rotary measuring fixture (8) so that the rotary measuring fixture (8) can rotate 360°, and the other rotary motor (11) is symmetrically equipped with a small-head detection fixture (9) and a large-head integrated detection fixture (10) so that the large-head integrated detection fixture (10) and the small-head detection fixture (9) can exchange positions. The rotary measuring fixture (8), the small-head detection fixture (9) and the large-head integrated detection fixture (10) are used to clamp the machine head body; The rotary measuring fixture (8) and the large-head integrated testing fixture (10) are both C-frames. The lower end of the rotary measuring fixture is provided with a fixed center, and the upper end of the rotary measuring fixture is provided with a movable center that can move up and down. The middle of the rotary measuring fixture is provided with a light-transmitting hole for the CCD testing mechanism to detect. The fixed center and movable center of the rotary measuring fixture are coaxial with the corresponding rotary motor (11). The small-head testing fixture (9) is provided with a positioning pin, which is used to insert into the shaft hole on the large head of the machine head to position the machine head. The upper end of the large-head integrated testing fixture (10) is provided with a fixed center, and the lower end of the large-head integrated testing fixture (10) is provided with a movable center that can move up and down. The rotating measuring fixture has a positioning part on one side of the movable tip, which is used to cooperate with the positioning groove on the large head of the machine head to position the machine head in the circumferential direction. A compression spring is provided between the movable tip of the rotary measuring fixture and the upper end of the rotary measuring fixture, so that the movable tip of the rotary measuring fixture can fit with the shaft hole on the large head of the machine head body through the spring force. A connecting rod is provided at the upper end of the movable tip of the rotary measuring fixture. The connecting rod extends out of the upper end of the rotary measuring fixture and is fixedly connected to the detection handwheel (14). The detection handwheel (14) is used to lift the movable tip of the rotary measuring fixture and pick up and put down the machine head body. The fixture includes a clamping mechanism (3), which includes a pull block (15), a Z-direction cylinder (16), an X-direction cylinder (18), and a clamping bracket (20). The pull block (15) is C-shaped and has a bayonet at its lower end. The bayonet is used to engage with the detection handwheel (14). The pull block (15) is mounted on the Z-direction cylinder (16), which is used to drive the pull block (15) to move upward. The pull block (15) pulls the detection handwheel (14) of the rotating fixture (8) to release the positioning clamped head body (34). The Z-direction cylinder (16) is mounted on the X-direction cylinder (18), which is used to drive the pull block (15) to move horizontally to engage with the detection handwheel (14). The X-direction cylinder (18) is connected to the clamping bracket (20). The lower end of the movable tip of the large-head integrated testing fixture (10) is connected to the lower positioning block (40). The movable tip slides in cooperation with the large-head integrated testing fixture (10). The lower end of the large-head integrated testing fixture (10) is provided with a relief groove. The relief groove corresponds to the lower positioning block (40). The relief groove is for the pressure block (22) to extend into. It also includes a clamp pressing mechanism, which includes a pressure block (22), a Y-direction cylinder (23), a Z-direction cylinder (24), and a clamp pressing bracket (28). The pressure block (22) is mounted on the Z-direction cylinder (24), and the pressure block (22) is provided with a snap-fit ​​structure. The Z-direction cylinder (24) is used to drive the pressure block (22) to press down the lower positioning block (40) of the large-head integrated detection clamp (10) and release the machine head body (34). The Z-direction cylinder (24) is mounted on the Y-direction cylinder (23), and the Y-direction cylinder (23) is used to drive the pressure block (22) to move to snap-fit ​​with the lower positioning block (40). The Y-direction cylinder (23) is connected to the clamp pressing bracket (28). It also includes a transplanting mechanism, which includes an X-direction electric cylinder (31), a Y-direction electric cylinder (30), a Z-direction electric cylinder (35), a pneumatic gripper (33), a vertical plate (36), and a base plate (39). The pneumatic gripper (33) is mounted on the Z-direction electric cylinder (35). The pneumatic gripper (33) performs transplanting by clamping the middle rod of the machine head body (34), installing the machine head body onto the rotating measuring fixture (8), or removing the machine head body from the rotating measuring fixture (8). The Z-direction electric cylinder is mounted on the vertical plate (36), and the vertical plate (36) is connected to the X-direction electric cylinder (31). The X-direction electric cylinder (31) is mounted on the Y-direction electric cylinder (30), and the Y-direction electric cylinder (30) is mounted on the base plate (39).

2. The automatic clamping structure for the machine head body according to claim 1, characterized in that: Two rotary motors (11), a clamp pull-up bracket (20), a clamp press-down bracket (28), and a base plate (39) are mounted on the same base.

3. A control method for the automatic clamping structure of the machine head body as described in claim 1, characterized in that: The machine head body is positioned and clamped on the rotary measuring fixture for measuring the axial shape and radial depth dimensions. During the measurement process, the corresponding rotary motor drives the rotary measuring fixture to rotate 360° to complete the all-round inspection of the axial shape of the machine head body. The pneumatic gripper of the transplanting mechanism holds the rod of the machine head body. Then, the pull block of the clamping mechanism pulls the detection handwheel of the rotary measuring clamp upward. At this time, the Z-direction electric cylinder of the transplanting mechanism drives the pneumatic gripper to lift upward. Then, the X-direction electric cylinder moves backward, driving the machine head body away from the positioning position of the rotary measuring clamp. Next, the Y-direction electric cylinder of the transplanting mechanism drives the machine head body to move to the front of the large-head integrated detection clamp. At this time, the Y-direction cylinder of the clamping mechanism drives the pressure block to move to the position of the lower positioning block of the large-head integrated detection clamp. The Z-direction cylinder drives the pressure block to press down the lower positioning block. Then, the X-direction electric cylinder of the transplanting mechanism drives the pneumatic gripper to send the machine head body to the axial positioning vertical surface of the large-head integrated detection clamp and lifts it upward to press against the top of the clamp. Then, the pressure block of the clamping mechanism lifts up, and the lower positioning block of the large-head integrated detection clamp rises to press against the lower end of the machine head body, completing the positioning and clamping of the machine head body for measuring the external dimensions of the large-head end face of the machine head body. The clamp pressing mechanism presses down the lower positioning block of the large-head integrated inspection clamp, and the transplanting mechanism clamps the head body rod and moves it downward, away from the positioning block, and moves it to the front of the small-head clamp. At this time, the pneumatic gripper rotates 180° to complete the head body turning and places the head body on the small-head clamp for the inspection of the small-head end face size of the head body.

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