Self-adaptive detection device for size of inner cavity of special-shaped machining part

Abstract

The invention discloses a self-adaptive detection device for the size of an inner cavity of a part machined by a special-shaped machine, and relates to the technical field of part detection. According to the invention, a multi-stage reflection light path formed by a first reflection lens, a second reflection lens, a third reflection lens and a fourth reflection lens is utilized to sequentially reflect and conduct laser according to a fixed 45-degree angle, so that the light is irradiated on the light sensor. The design can effectively detect whether the detection tube has mechanical micro-deformation, and greatly improves the precision of inner cavity size detection. The L-shaped extension rod convenient to disassemble is combined with the detection contact ball, so that self-adaptive extension of the detection tool to different inner cavity sizes and shapes is realized. By flexibly changing and combining the structure, the extension depth of the detection contact ball can be adjusted according to the specific requirements of the inner cavity of the part, and the full contact with the inner wall of the part is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of part detection, and particularly to an adaptive detection device for the inner cavity size of special-shaped machined parts. Background Art

[0002] Currently, the detection of the inner cavity size of special-shaped machined parts mostly adopts the traditional mechanical contact method. However, when the detection head contacts the part, the device cannot effectively identify it, resulting in unsatisfactory detection accuracy. Secondly, traditional detection tools are usually of fixed structure and cannot adaptively change according to the complex shape of the inner cavity of the part, often resulting in problems such as non-contact or position deviation. In addition, the problems of external vibration and the vibration of the device itself have not been effectively monitored, making the detection results vulnerable to environmental interference. Finally, the laser calibration means are mostly manual adjustment or simple in structure and cannot achieve real-time automatic correction, thus affecting the overall measurement accuracy. Summary of the Invention

[0003] To overcome the defects of the above-mentioned prior art, the present invention provides the following technical solution: An adaptive detection device for the inner cavity size of special-shaped machined parts, including a detection tube. One end of the detection tube is fixedly installed with an L-shaped extension rod or a detection contact ball in a detachable manner. When the detection tube is fixedly matched with the L-shaped extension rod, the detection contact ball is fixedly matched with the L-shaped extension rod in a detachable manner; the other end of the detection tube is fixedly installed on an installation frame, and a laser emitter, an outer light sensor for detecting the light emitted by the laser emitter, and an inner light sensor are arranged inside the installation frame; a first reflecting mirror, a second reflecting mirror, a third reflecting mirror, and a fourth reflecting mirror are fixedly installed inside the detection tube. The second reflecting mirror is used to reflect the light emitted by the laser emitter onto the third reflecting mirror, the third reflecting mirror reflects the light onto the fourth reflecting mirror, the fourth reflecting mirror reflects the light onto the first reflecting mirror, and the first reflecting mirror reflects the light onto the outer light sensor and / or the inner light sensor.

[0004] Preferably, a light-shielding plate is fixedly installed on the outside of the installation frame, and a transparent pool is fixedly installed on the inner wall of the light-shielding plate and the installation frame. A light sensor bracket is fixedly and hermetically installed on the transparent pool. The outer light sensor and the inner light sensor are fixed on the light sensor bracket. The outer light sensor is sleeved outside the inner light sensor, and the outer light sensor and the inner light sensor are concentrically arranged; distilled water is arranged inside the transparent pool.

[0005] Preferably, a laser emitter bracket is fixedly installed on the outer surface of the transparent cell, the laser emitter is fixedly installed on the laser emitter bracket, a convex lens fixing bracket is also fixedly installed on the laser emitter bracket, a calibration slide bar and a calibration motor are fixedly installed on the convex lens fixing bracket. A concave lens bracket is slidably disposed on the calibration slide bar, a calibration lead screw is fixedly installed on the output shaft of the calibration motor, and the calibration lead screw is in threaded driving cooperation with the concave lens bracket.

[0006] Preferably, a convex lens is fixedly installed on the convex lens fixing bracket, a concave lens is fixedly installed on the concave lens bracket, and the light emitted by the laser emitter sequentially passes through the convex lens and the concave lens, so as to correct the light emitted by the laser emitter to irradiate along the 45-degree direction of the surface of the second reflecting lens. The first reflecting lens, the second reflecting lens, the third reflecting lens and the fourth reflecting lens are all arranged at 45 degrees to the horizontal plane, and the axis of the detection tube is parallel to the horizontal plane.

[0007] Preferably, the installation frame is rotatably installed at the bottom end of the vertical drop rod, a swing transmission shaft is rotatably arranged at the axis of the vertical drop rod, the bottom end of the swing transmission shaft is fixedly matched with the installation frame, the top end of the vertical drop rod is fixedly installed on the bottom displacement slider, a swing electric cylinder is fixedly installed on the bottom displacement slider, a rack is fixedly installed at the end of the telescopic rod of the swing electric cylinder, the top end of the swing transmission shaft extends above the swing electric cylinder, and a gear meshing with the rack is fixedly installed at the top end of the swing transmission shaft for driving the installation frame to rotate and swing.

[0008] Preferably, a rotation detection disc is fixedly installed at the top end of the swing transmission shaft or on the gear, an arc-shaped resistance strip is arranged on the circumferential surface of the rotation detection disc, and a sliding conductive needle slidably and conductively matched with the arc-shaped resistance strip is fixedly installed inside the bottom displacement slider.

[0009] Preferably, the bottom displacement slider is slidably installed on the bottom displacement bracket, a bottom servo motor is fixedly installed on the bottom displacement bracket, a bottom displacement lead screw rotatably matched with the bottom displacement bracket is fixedly installed on the output shaft of the bottom servo motor, and the bottom displacement lead screw is in threaded driving cooperation with the bottom displacement slider.

[0010] Preferably, the bottom displacement bracket is slidably installed on the top sliding rod, the top sliding rod is fixedly installed on the top support frame, the top support frame is fixedly installed on the support side wall, a top displacement lead screw in threaded driving cooperation with the bottom displacement bracket is rotatably installed on the top support frame and the support side wall, the top displacement lead screw is fixedly installed on the output shaft of the top servo motor, and the top servo motor is fixedly installed on the support side wall.

[0011] Preferably, the supporting side wall is fixedly installed on the detection table. A height control electric cylinder is fixedly installed on the lower surface of the detection table. The end of the telescopic rod of the height control electric cylinder extends above the detection table, and a placement plate is fixed at the end of the telescopic rod of the height control electric cylinder for placing the parts to be detected.

[0012] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention utilizes a multi-stage reflection optical path composed of the first, second, third, and fourth reflecting lenses to reflect and conduct the laser in sequence at a fixed 45° angle, so that the light irradiates on the light sensor. This design can effectively detect whether there is mechanical micro-deformation in the detection tube, greatly improving the accuracy of the inner cavity size detection; (2) The present invention adopts a detachable L-shaped extension rod combined with a detection contact ball to achieve the adaptive extension of the detection tool for different inner cavity sizes and shapes. By flexibly swapping and combining the structures, the insertion depth of the detection contact ball can be adjusted according to the specific requirements of the inner cavity of the part to ensure full contact with the inner wall of the part; (3) The present invention realizes the synchronous and stable movement of the detection contact ball during the detection process through the linkage control of the top and bottom servo motors. The top displacement lead screw cooperates with the bottom displacement slider, enabling the detection tool to maintain continuous and close contact with the inner cavity wall of the part, thereby capturing the size change information in real time; (4) The present invention is internally provided with a transparent pool filled with distilled water. Utilizing the sensitivity of the microwave pattern on the water surface to the refraction of the laser, the external vibration condition is monitored in real time. When the environmental vibration or the movement speed is too fast, the water surface generates ripples, causing the refraction angle of the laser to change, so that the outer light sensor detects an abnormal signal; (5) The present invention is equipped with an independent laser calibration system, which is jointly composed of a convex lens, a concave lens, and a calibration motor. Through the linkage adjustment of the calibration lead screw and the slide bar, the beam angle and path of the laser emitted by the laser emitter can be corrected in real time to ensure that the laser always accurately irradiates on the second reflecting lens along the predetermined direction. This automatic calibration function effectively eliminates the optical path deviation caused by the laser installation error or long-term use, making the detection data more accurate. Description of the Drawings

[0013] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0014] Figure 2 For the present invention Figure 1 Schematic diagram of the structure at A.

[0015] Figure 3 It is a schematic diagram of the placement plate structure of the present invention.

[0016] Figure 4 It is a schematic diagram of the rotating detection disc structure of the present invention.

[0017] Figure 5 It is a schematic diagram of the structure at the rack of the present invention.

[0018] Figure 6Schematic diagram of the structure at the installation frame of the present invention.

[0019] Figure 7 For the present invention Figure 7 Schematic diagram of the structure at position B in the present invention.

[0020] Figure 8 Schematic diagram of the structure at the transparent cell of the present invention.

[0021] Figure 9 Schematic diagram of the detection tube structure of the present invention.

[0022] In the figure: 101 - detection table; 102 - height control electric cylinder; 103 - placement tray; 104 - support side wall; 105 - top support frame; 106 - top sliding rod; 107 - top displacement lead screw; 108 - top servo motor; 109 - bottom displacement bracket; 110 - bottom servo motor; 111 - bottom displacement lead screw; 112 - bottom displacement slider; 113 - vertical drop rod; 114 - rotary detection disk; 115 - sliding conductive needle; 116 - arc resistance strip; 117 - swing transmission shaft; 118 - gear; 119 - rack; 120 - swing electric cylinder; 121 - installation frame; 122 - light shield; 123 - detection tube; 124 - L-shaped extension rod; 125 - detection contact ball; 126 - transparent cell; 127 - laser emitter bracket; 128 - laser emitter; 129 - convex lens fixing frame; 130 - calibration motor; 131 - calibration slide bar; 132 - calibration lead screw; 133 - concave lens; 134 - convex lens; 135 - outer light sensor; 136 - inner light sensor; 137 - light sensor bracket; 138 - first reflecting lens; 139 - second reflecting lens; 140 - third reflecting lens; 141 - fourth reflecting lens; 142 - concave lens bracket. Detailed implementation manners

[0023] The following combines the attached Figures 1-9 , and further illustrates the technical solution of the present invention through specific implementation manners.

[0024] The present invention provides a device for adaptively detecting the inner cavity size of a special-shaped machined part, including a detection tube 123. One end of the detection tube 123 is fixedly installed with an L-shaped extension rod 124 or a detection contact ball 125 in a detachable manner. When the detection tube 123 is fixedly fitted with the L-shaped extension rod 124, the detection contact ball 125 is fixedly fitted with the L-shaped extension rod 124 in a detachable manner; the other end of the detection tube 123 is fixedly installed on an installation frame 121. Inside the installation frame 121, a laser emitter 128, an outer light sensor 135 for detecting the light emitted by the laser emitter 128, and an inner light sensor 136 are provided; inside the detection tube 123, a first reflecting lens 138, a second reflecting lens 139, a third reflecting lens 140, and a fourth reflecting lens 141 are fixedly installed. Among them, the second reflecting lens 139 is used to reflect the light emitted by the laser emitter 128 onto the third reflecting lens 140, the third reflecting lens 140 reflects the light onto the fourth reflecting lens 141, the fourth reflecting lens 141 reflects the light onto the first reflecting lens 138, and the first reflecting lens 138 reflects the light onto the outer light sensor 135 and / or the inner light sensor 136. A light-shielding plate 122 is fixedly installed on the outside of the installation frame 121. A transparent pool 126 is fixedly installed on the common wall of the light-shielding plate 122 and the installation frame 121. A light sensor bracket 137 is fixedly and sealedly installed on the transparent pool 126. Among them, the outer light sensor 135 and the inner light sensor 136 are fixed on the light sensor bracket 137. The outer light sensor 135 is sleeved outside the inner light sensor 136, and the outer light sensor 135 and the inner light sensor 136 are concentrically arranged; distilled water is provided inside the transparent pool 126. A laser emitter bracket 127 is fixedly installed on the outer surface of the transparent pool 126. The laser emitter 128 is fixedly installed on the laser emitter bracket 127. A convex lens fixing frame 129 is also fixedly installed on the laser emitter bracket 127. A calibration slide bar 131 and a calibration motor 130 are fixedly installed on the convex lens fixing frame 129. Among them, a concave lens bracket 142 is slidably fitted on the calibration slide bar 131. A calibration lead screw 132 is fixedly installed on the output shaft of the calibration motor 130. The calibration lead screw 132 is in threaded transmission cooperation with the concave lens bracket 142. A convex lens 134 is fixedly installed on the convex lens fixing frame 129. A concave lens 133 is fixedly installed on the concave lens bracket 142. The light emitted by the laser emitter 128 sequentially passes through the convex lens 134 and the concave lens 133, so as to correct the light emitted by the laser emitter 128 to irradiate along the 45-degree direction of the surface of the second reflecting lens 139; among them, the first reflecting lens 138, the second reflecting lens 139, the third reflecting lens 140, and the fourth reflecting lens 141 are all arranged at 45 degrees to the horizontal plane, and the axis of the detection tube 123 is parallel to the horizontal plane.The mounting frame 121 is rotatably mounted at the bottom end of the vertical drop rod 113. A swinging transmission shaft 117 is rotatably arranged at the axis of the vertical drop rod 113. The bottom end of the swinging transmission shaft 117 is fixedly fitted with the mounting frame 121. The top end of the vertical drop rod 113 is fixedly mounted on the bottom displacement slider 112. A swinging electric cylinder 120 is fixedly mounted on the bottom displacement slider 112. A rack 119 is fixedly mounted at the end of the telescopic rod of the swinging electric cylinder 120. The top end of the swinging transmission shaft 117 extends above the swinging electric cylinder 120, and a gear 118 meshing and driving with the rack 119 is fixedly mounted at the top end of the swinging transmission shaft 117 for driving the mounting frame 121 to rotate and swing. A rotation detection disc 114 is fixedly mounted at the top end of the swinging transmission shaft 117 or on the gear 118. An arc-shaped resistance strip 116 is arranged on the circumferential surface of the rotation detection disc 114. A sliding conductive needle 115 in sliding conductive fit with the arc-shaped resistance strip 116 is fixedly mounted inside the bottom displacement slider 112. The bottom displacement slider 112 is slidably mounted on the bottom displacement bracket 109. A bottom servo motor 110 is fixedly mounted on the bottom displacement bracket 109. A bottom displacement lead screw 111 rotatably fitted with the bottom displacement bracket 109 is fixedly mounted on the output shaft of the bottom servo motor 110. The bottom displacement lead screw 111 is in threaded transmission fit with the bottom displacement slider 112. The bottom displacement bracket 109 is slidably mounted on the top sliding rod 106. The top sliding rod 106 is fixedly mounted on the top support frame 105. The top support frame 105 is fixedly mounted on the support side wall 104. A top displacement lead screw 107 in threaded transmission fit with the bottom displacement bracket 109 is also rotatably mounted on the top support frame 105 and the support side wall 104. The top displacement lead screw 107 is fixedly mounted on the output shaft of the top servo motor 108. The top servo motor 108 is fixedly mounted on the support side wall 104. The support side wall 104 is fixedly mounted on the inspection table 101. A height control electric cylinder 102 is fixedly mounted on the lower surface of the inspection table 101. The end of the telescopic rod of the height control electric cylinder 102 extends above the inspection table 101, and a placement disc 103 for placing the parts to be inspected is fixed at the end of the telescopic rod of the height control electric cylinder 102.

[0025] The working principle of a self-adaptive detection device for the inner cavity size of a special-shaped machined part disclosed in the present invention is as follows: Place the part on the placement plate 103, and then control the telescopic amount of the telescopic rod of the height control electric cylinder 102 to control the distance between the part and the detection tube 123. According to the position of the inner cavity of the part, rotate to install the detection contact ball 125 on the detection tube 123 or install the L-shaped extension rod 124 (used to extend the detection contact ball 125 into the inner cavity of the part). Control the top servo motor 108, and the output shaft of the top servo motor 108 drives the top displacement lead screw 107 to rotate. The rotation of the top displacement lead screw 107 drives the bottom displacement bracket 109 to slide along the top sliding rod 106 (the axis of the top sliding rod 106 and the top displacement lead screw 107 are arranged in parallel). At this time, the detection contact ball 125 can be controlled to move synchronously with the bottom displacement bracket 109; control the bottom servo motor 110, and the output shaft of the bottom servo motor 110 drives the bottom displacement lead screw 111 to rotate. The bottom displacement lead screw 111 drives the bottom displacement slider 112 to move along the axis of the bottom displacement lead screw 111. At this time, the detection contact ball 125 can be controlled to move synchronously with the bottom displacement slider 112; control the swing electric cylinder 120, and the telescopic rod of the swing electric cylinder 120 drives the rack 119 to move. The rack 119 drives the gear 118 to rotate. The gear 118 drives the swing transmission shaft 117 to rotate. The swing transmission shaft 117 drives the mounting frame 121 to rotate and swing. The mounting frame 121 drives the detection tube 123 to swing (the swing angle can be judged by the resistance value of the loop formed between the sliding conductive needle 115 and the arc-shaped resistance strip 116. One end of the arc-shaped resistance strip 116 and the sliding conductive needle 115 are connected in series to a DC circuit), and then drives the detection contact ball 125 to move synchronously. The movement of the detection contact ball 125 will contact the inner cavity wall of the part. During the contact, the detection tube 123 will be bent and deformed microscopically. During this process, the third reflecting lens 140 and the fourth reflecting lens 141 on the side away from the mounting frame 121 will move accordingly. This will cause the position of the light reflected by the fourth reflecting lens 141 onto the first reflecting lens 138 to change. Therefore, the position of the light reflected by the first reflecting lens 138 onto the inner light sensor 136 changes. At this time, by monitoring the change of the light through the inner light sensor 136, it can be known whether the detection contact ball 125 contacts the part, and the position at the moment of contact is the coordinate position of the part size. The set angles of the third reflecting lens 140 and the fourth reflecting lens 141 are inclined at 45 degrees in two directions (vertical plane and horizontal plane).

[0026] In order to ensure the accuracy of dimension detection, it is necessary to slow down the movement speed of the detection contact ball 125. When the speed is too fast or there is external vibration, the measurement accuracy will be affected. At this time, the external vibration will drive the overall vibration, and ripples will be generated on the surface of the distilled water inside the transparent cell 126. After the light passes through the transparent cell 126 and enters the water, it will be emitted from the surface of the distilled water to the inner light sensor 136. If the surface ripples of the water are too large (the vibration amplitude is too large), the uneven surface of the water will cause the light to refract. At this time, the refracted light will no longer be incident on the inner light sensor 136, but on the outer light sensor 135. Therefore, as long as the light source detected by the outer light sensor 135 is detected, it can be judged that the detection environment has vibration. Before using the device, it is necessary to calibrate the light emitted by the laser emitter 128 so that the light can be vertically incident on the second reflecting mirror 139 along the longitudinal direction (at a 45-degree angle to the upper surface of the second reflecting mirror 139). At this time, the calibration motor 130 can be controlled. The output shaft of the calibration motor 130 drives the calibration lead screw 132 to rotate, and the calibration lead screw 132 drives the concave lens bracket 142 to slide along the calibration slide bar 131, and then drives the concave lens 133 to move synchronously. At this time, the distance between the convex lens 134 and the concave lens 133 can be adjusted, thereby adjusting the angle of the light emitted by the concave lens 133 (when the laser emitter 128 is installed, it is necessary to ensure the parallelism of one plane, or two sets of concave lenses 133 and convex lenses 134 are used for calibration, and the two sets of concave lenses 133 and convex lenses 134 are arranged vertically).

Claims

1. An adaptive detection device for the inner cavity size of special-shaped machined parts, characterized in that: The detection tube (123) comprises an L-shaped extension rod (124) or a detection contact ball (125) fixedly mounted on one end of the detection tube (123) in a manner that is easy to disassemble. When the detection tube (123) is fixedly matched with the L-shaped extension rod (124), the detection contact ball (125) is fixedly matched with the L-shaped extension rod (124) in a manner that is easy to disassemble. The other end of the detection tube (123) is fixedly mounted on the mounting frame (121), and a laser emitter (128) and an outer light sensor (135) and an inner light sensor (136) for detecting light emitted by the laser emitter (128) are arranged inside the mounting frame (121); a first reflective lens (138), a second reflective lens (139), a third reflective lens (140) and a fourth reflective lens (141) are fixedly mounted inside the detection tube (123), wherein the second reflective lens (139) is used to reflect light emitted by the laser emitter (128) onto the third reflective lens (140), the third reflective lens (140) reflects light onto the fourth reflective lens (141), the fourth reflective lens (141) reflects light onto the first reflective lens (138), and the first reflective lens (138) reflects light onto the outer light sensor (135) and / or the inner light sensor (136).

2. The self-adaptive detection device for the inner cavity size of a special-shaped machined part according to claim 1, characterized in that: A light shielding plate (122) is fixedly mounted on the outer side of the mounting frame (121); a transparent pool (126) is fixedly mounted on the inner wall of the light shielding plate (122) and the mounting frame (121); a light sensor bracket (137) is fixedly and sealedly mounted on the transparent pool (126); an outer light sensor (135) and an inner light sensor (136) are fixed on the light sensor bracket (137); the outer light sensor (135) is sleeved on the outer side of the inner light sensor (136); the outer light sensor (135) and the inner light sensor (136) are concentrically arranged; and distilled water is arranged inside the transparent pool (126).

3. The self-adaptive detection device for the inner cavity size of a special-shaped machined part according to claim 2, characterized in that: A laser emitter bracket (127) is fixedly mounted on the outer surface of the transparent pool (126); a laser emitter (128) is fixedly mounted on the laser emitter bracket (127); a convex lens fixing frame (129) is also fixedly mounted on the laser emitter bracket (127); a calibration slide bar (131) and a calibration motor (130) are fixedly mounted on the convex lens fixing frame (129); a concave lens bracket (142) is slidably mounted on the calibration slide bar (131); a calibration screw rod (132) is fixedly mounted on the output shaft of the calibration motor (130); and the calibration screw rod (132) and the concave lens bracket (142) are threadedly engaged.

4. The self-adaptive detection device for the inner cavity size of a special-shaped machined part according to claim 3, characterized in that: A convex lens (134) is fixedly mounted on the convex lens fixing frame (129), and a concave lens (133) is fixedly mounted on the concave lens bracket (142). Light emitted by the laser emitter (128) passes through the convex lens (134) and the concave lens (133) in sequence, so as to correct the light emitted by the laser emitter (128) so that it can be irradiated along the surface of the second reflective lens (139) at a direction of forty-five degrees; wherein the first reflective lens (138), the second reflective lens (139), the third reflective lens (140) and the fourth reflective lens (141) are all arranged at forty-five degrees to the horizontal plane, and wherein the axis of the detection tube (123) is arranged parallel to the horizontal plane.

5. The self-adaptive detection device for the inner cavity size of a special-shaped machined part according to claim 4, characterized in that: The mounting frame (121) is rotatably mounted on the bottom end of the vertical drop rod (113); a swing transmission shaft (117) is rotatably arranged at the axis of the vertical drop rod (113); the bottom end of the swing transmission shaft (117) is fixedly matched with the mounting frame (121); the top end of the vertical drop rod (113) is fixedly mounted on the bottom displacement slider (112); a swing electric cylinder (120) is fixedly mounted on the bottom displacement slider (112); a rack (119) is fixedly mounted on the end of the telescopic rod of the swing electric cylinder (120); the top end of the swing transmission shaft (117) extends above the swing electric cylinder (120); and a gear (118) meshing with the rack (119) is fixedly mounted on the top end of the swing transmission shaft (117) for driving the mounting frame (121) to rotate and swing.

6. The self-adaptive detection device for the inner cavity size of a special-shaped machined part according to claim 5, characterized in that: A rotating detection disk (114) is fixedly mounted on the top end of the swing transmission shaft (117) or the gear (118), an arc-shaped resistor bar (116) is provided on the circumferential surface of the rotating detection disk (114), and a sliding conductive needle (115) that cooperates with the arc-shaped resistor bar (116) for sliding conduction is fixedly mounted on the inner side of the bottom displacement slider (112).

7. The self-adaptive detection device for the inner cavity size of a special-shaped machined part according to claim 6, characterized in that: The bottom displacement slider (112) is slidably mounted on the bottom displacement bracket (109), a bottom servo motor (110) is fixedly mounted on the bottom displacement bracket (109), a bottom displacement lead screw (111) rotatably matched with the bottom displacement bracket (109) is fixedly mounted on the output shaft of the bottom servo motor (110), and the bottom displacement lead screw (111) is threadedly matched with the bottom displacement slider (112).

8. The self-adaptive detection device for the inner cavity size of a special-shaped machined part according to claim 7, characterized in that: The bottom displacement bracket (109) is slidably mounted on the top sliding rod (106), the top sliding rod (106) is fixedly mounted on the top support frame (105), the top support frame (105) is fixedly mounted on the supporting side wall (104), and a top displacement lead screw (107) that is threadedly matched with the bottom displacement bracket (109) is rotatably mounted on the top support frame (105) and the supporting side wall (104), the top displacement lead screw (107) is fixedly mounted on the output shaft of the top servo motor (108), and the top servo motor (108) is fixedly mounted on the supporting side wall (104).

9. The self-adaptive detection device for the inner cavity size of a special-shaped machined part according to claim 8, characterized in that: The supporting side wall (104) is fixedly mounted on the testing platform (101), a height control electric cylinder (102) is fixedly mounted on the lower surface of the testing platform (101), an end of a telescopic rod of the height control electric cylinder (102) extends above the testing platform (101), and a placement plate (103) is fixedly mounted on the end of the telescopic rod of the height control electric cylinder (102) for placing parts to be tested.

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