A self-adaptive detection device for the inner cavity size of a special-shaped machined part

Abstract

The application discloses a special-shaped machining part inner cavity size self-adaptive detection device and relates to the technical field of part detection. The application utilizes a multi-stage reflection light path composed of first, second, third and fourth reflectors to sequentially reflect and conduct laser light at a fixed 45-degree angle, so that the light is irradiated onto a light sensor. This design can effectively detect whether mechanical micro-deformation exists in the detection tube, greatly improving the precision of inner cavity size detection. An L-shaped extension rod which is convenient to disassemble is combined with a detection contact ball to realize self-adaptive extension of the detection tool to different inner cavity sizes and shapes. Through flexible adjustment and combination structure, the extension depth of the detection contact ball can be adjusted according to the specific requirements of the part inner cavity, so that full contact with the inner wall of the part is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of part detection, in particular to a self-adaptive detection device for the inner cavity size of a special-shaped machined part. BACKGROUND

[0002] Currently, the inner cavity size of a special-shaped machined part is detected by a traditional mechanical touch method. However, when the detection head contacts the part, the device cannot effectively identify it, resulting in an unsatisfactory detection accuracy. Secondly, the traditional detection tool is usually of a fixed structure and cannot be self-adaptively changed according to the complex shape of the inner cavity of the part, often resulting in a problem of not being able to contact or a positional deviation. In addition, the external vibration and the vibration of the device itself cannot be effectively monitored, so that the detection result is easily disturbed by the environment. Finally, the laser calibration means is usually manually adjusted or simple in structure and cannot be automatically corrected in real time, thereby affecting the overall measurement accuracy. SUMMARY

[0003] In order to overcome the defects of the prior art, the present application provides the following technical scheme: a self-adaptive detection device for the inner cavity size of a special-shaped machined part, comprising 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 a mounting frame, the mounting frame is internally provided with a laser emitter, and an external light sensor and an internal light sensor for detecting the light emitted by the laser emitter; the inside of the detection tube is fixedly installed with a first reflecting mirror, a second reflecting mirror, a third reflecting mirror and a fourth reflecting mirror, wherein the second reflecting mirror is used for reflecting 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 external light sensor and / or the internal light sensor.

[0004] Preferably, the mounting frame is externally fixedly installed with a light shield, the light shield and the inner wall of the mounting frame are jointly fixedly installed with a transparent pool, the transparent pool is fixedly and sealingly installed with a light sensor support, wherein the external light sensor and the internal light sensor are fixed on the light sensor support, the external light sensor is sleeved to the outside of the internal light sensor, and the external light sensor and the internal light sensor are concentrically arranged; the inside of the transparent pool is provided with distilled water.

[0005] Preferably, a laser emitter support is fixedly installed on the outer surface of the transparent tank, a laser emitter is fixedly installed on the laser emitter support, a convex lens fixing frame is also fixedly installed on the laser emitter support, a calibration slide rod and a calibration motor are fixedly installed on the convex lens fixing frame, a concave lens support is slidably arranged on the calibration slide rod, a calibration lead screw is fixedly installed on the output shaft of the calibration motor, and the calibration lead screw is in threaded transmission cooperation with the concave lens support.

[0006] Preferably, a convex lens is fixedly installed on the convex lens fixing frame, a concave lens is fixedly installed on the concave lens support, and the light emitted by the laser emitter passes through the convex lens and the concave lens in sequence, so as to correct the light emitted by the laser emitter to be able to irradiate along the forty-five-degree direction of the surface of the second mirror piece; wherein the first mirror piece, the second mirror piece, the third mirror piece and the fourth mirror piece are all arranged at forty-five degrees with the horizontal plane, and the detection tube axis is arranged parallel to the horizontal plane.

[0007] Preferably, the mounting 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 mounting frame, the top end of the vertical drop rod is fixedly installed on the bottom displacement sliding block, a swing electric cylinder is fixedly installed on the bottom displacement sliding block, a rack is fixedly installed at the end of the extension rod of the swing electric cylinder, the top end of the swing transmission shaft extends above the swing electric cylinder, and a gear fixedly installed at the top end of the swing transmission shaft is in meshing transmission with the rack, so as to drive the mounting frame to rotate and swing.

[0008] Preferably, a rotation detection disc is fixedly installed on the top end of the swing transmission shaft or the gear, the circumferential surface of the rotation detection disc is provided with an arc-shaped resistance strip, and the inner side of the bottom displacement sliding block is fixedly installed with a sliding conductive needle in sliding conductive cooperation with the arc-shaped resistance strip.

[0009] Preferably, the bottom displacement sliding block is slidably installed on a bottom displacement support, a bottom servo motor is fixedly installed on the bottom displacement support, a bottom displacement lead screw in rotational cooperation with the bottom displacement support is fixedly installed on the output shaft of the bottom servo motor, and the bottom displacement lead screw is in threaded transmission cooperation with the bottom displacement sliding block.

[0010] Preferably, the bottom displacement support is slidably installed on a top sliding rod, the top sliding rod is fixedly installed on a top support frame, the top support frame is fixedly installed on a support side wall, a top displacement lead screw in threaded transmission cooperation with the bottom displacement support is also 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 a top servo motor, and the top servo motor is fixedly installed on the support side wall.

[0011] Preferably, the support side wall is fixedly installed on the detection table, the lower surface of the detection table is fixedly installed with a height control electric cylinder, the telescopic rod end of the height control electric cylinder extends to above the detection table, and the telescopic rod end of the height control electric cylinder is fixedly installed with a placing disc for placing the part to be detected.

[0012] Compared with the prior art, the present application has the following advantages: (1) the present application uses a multi-stage reflection light path composed of first, second, third and fourth reflectors to reflect and conduct the laser in turn at a fixed angle of 45°, so that the light is irradiated onto the light sensor. This design can effectively detect whether the detection tube has mechanical micro-deformation, greatly improving the precision of the inner cavity size detection; (2) the present application uses a detachable L-shaped extension rod combined with a detection contact ball to realize the self-adaptive extension of the detection tool to different inner cavity sizes and shapes. By flexibly adjusting and combining the structure, the detection contact ball can be adjusted in depth according to the specific requirements of the part inner cavity to ensure full contact with the inner wall of the part; (3) the present application realizes the synchronous and smooth movement of the detection contact ball during the detection process through the linkage control of the top and bottom servo motors. The cooperation of the top displacement screw and the bottom displacement slider enables the detection tool to maintain continuous and close contact with the inner cavity wall of the part, thereby capturing size change information in real time; (4) the present application is internally provided with a transparent pool filled with distilled water, which uses the sensitivity of water surface micro-ripple to laser refraction to monitor external vibration in real time. When the environmental vibration or movement speed is too fast, the ripples on the water surface cause changes in the laser refraction angle, thereby causing the outside light sensor to detect abnormal signals; (5) the present application is equipped with an independent laser calibration system composed of convex lenses, concave lenses and a calibration motor. Through the linkage adjustment of the calibration screw and the slide rod, the angle and path of the light beam emitted by the laser emitter can be corrected in real time to ensure that the laser always accurately irradiates onto the second reflector in the predetermined direction. This automatic calibration function effectively eliminates the light path deviation caused by laser installation errors or long-term use, making the detection data more accurate. BRIEF DESCRIPTION OF DRAWINGS

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

[0014] Figure 2 It is a schematic diagram of the structure at A in the present application. Figure 1

[0015] Figure 3 It is a schematic diagram of the structure of the placing disc of the present application.

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

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

[0018] Figure 6 ​Structure diagram of installation frame of the present application.

[0019] Figure 7 Structure diagram of installation frame of the present application. Figure 7 Structure diagram of installation frame of the present application.

[0020] Figure 8 Structure diagram of installation frame of the present application. Structure diagram of installation frame of the present application.

[0021] Structure diagram of installation frame of the present application. Figure 9 Structure diagram of installation frame of the present application. Structure diagram of installation frame of the present application.

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

[0023] The technical solutions of the present application are further illustrated below in combination with the accompanying drawings. Figures 1-9 The technical solutions of the present application are further illustrated below in combination with the accompanying drawings.

[0024] The application provides a special-shaped machined part inner cavity size self-adaptive detection device, which comprises 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 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 detachable manner; the other end of the detection tube 123 is fixedly installed on a mounting frame 121, the mounting frame 121 is internally provided with a laser emitter 128, an outer light sensor 135 and an inner light sensor 136 for detecting light emitted by the laser emitter 128; the detection tube 123 is internally fixedly installed with a first reflecting mirror 138, a second reflecting mirror 139, a third reflecting mirror 140 and a fourth reflecting mirror 141, wherein the second reflecting mirror 139 is used for reflecting the light emitted by the laser emitter 128 onto the third reflecting mirror 140, the third reflecting mirror 140 reflects the light onto the fourth reflecting mirror 141, the fourth reflecting mirror 141 reflects the light onto the first reflecting mirror 138, and the first reflecting mirror 138 reflects the light onto the outer light sensor 135 and / or the inner light sensor 136. The mounting frame 121 is externally fixedly installed with a light shield plate 122, the light shield plate 122 and the inner wall of the mounting frame 121 are jointly fixedly installed with a transparent pool 126, the transparent pool 126 is fixedly and sealingly installed with a light sensor support 137, wherein the outer light sensor 135 and the inner light sensor 136 are fixed on the light sensor support 137, the outer light sensor 135 is sleeved to the outside of the inner light sensor 136, and the outer light sensor 135 and the inner light sensor 136 are concentrically arranged; the transparent pool 126 is internally provided with distilled water. The outer surface of the transparent pool 126 is fixedly installed with a laser emitter support 127, the laser emitter 128 is fixedly installed on the laser emitter support 127, a convex lens fixing frame 129 is further fixedly installed on the laser emitter support 127, a calibration slide rod 131 and a calibration motor 130 are fixedly installed on the convex lens fixing frame 129, wherein a concave lens support 142 is slidingly arranged on the calibration slide rod 131, a calibration lead screw 132 is fixedly installed on the output shaft of the calibration motor 130, and the calibration lead screw 132 is threadedly and drivably matched with the concave lens support 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 support 142, and the light emitted by the laser emitter 128 passes through the convex lens 134 and the concave lens 133 in sequence, so that the light emitted by the laser emitter 128 can be irradiated along the forty-five-degree direction of the surface of the second reflecting mirror 139; wherein the first reflecting mirror 138, the second reflecting mirror 139, the third reflecting mirror 140 and the fourth reflecting mirror 141 are all arranged at forty-five degrees with the horizontal plane, and the axis of the detection tube 123 is arranged in parallel with the horizontal plane.The installation frame 121 is rotatably installed at the bottom end of the vertical drop rod 113, the shaft center of the vertical drop rod 113 is rotatably provided with the swing transmission shaft 117, the bottom end of the swing transmission shaft 117 is fixedly matched with the installation frame 121, the top end of the vertical drop rod 113 is fixedly installed on the bottom displacement sliding block 112, the bottom displacement sliding block 112 is fixedly installed with the swing electric cylinder 120, the telescopic rod end of the swing electric cylinder 120 is fixedly installed with the rack 119, the top end of the swing transmission shaft 117 extends to the upper side of the swing electric cylinder 120, and the top end of the swing transmission shaft 117 is fixedly installed with the gear 118 which is meshed and transmitted with the rack 119, for driving the installation frame 121 to rotate and swing. The top end of the swing transmission shaft 117 or the gear 118 is fixedly installed with the rotation detection disc 114, the circumferential surface of the rotation detection disc 114 is provided with the arc-shaped resistance strip 116, and the inner side of the bottom displacement sliding block 112 is fixedly installed with the sliding conductive needle 115 which is slidingly and conductively matched with the arc-shaped resistance strip 116. The bottom displacement sliding block 112 is slidingly installed on the bottom displacement support 109, the bottom displacement support 109 is fixedly installed with the bottom servo motor 110, the output shaft of the bottom servo motor 110 is fixedly installed with the bottom displacement screw 111 which is rotatably matched with the bottom displacement support 109, and the bottom displacement screw 111 is threadedly and transmissionally matched with the bottom displacement sliding block 112. The bottom displacement support 109 is slidingly installed on the top sliding rod 106, the top sliding rod 106 is fixedly installed on the top support frame 105, the top support frame 105 is fixedly installed on the support side wall 104, the top support frame 105 and the support side wall 104 are also rotatably installed with the top displacement screw 107 which is threadedly and transmissionally matched with the bottom displacement support 109, the top displacement screw 107 is fixedly installed on the output shaft of the top servo motor 108, and the top servo motor 108 is fixedly installed on the support side wall 104. The support side wall 104 is fixedly installed on the detection table 101, the lower surface of the detection table 101 is fixedly installed with the height control electric cylinder 102, the telescopic rod end of the height control electric cylinder 102 extends to the upper side of the detection table 101, and the telescopic rod end of the height control electric cylinder 102 is fixedly provided with the placement disc 103 for placing the parts to be detected.

[0025] The working principle of the special-shaped machined part inner cavity size self-adaptive detection device disclosed in the application is as follows: the part is placed on the placing disc 103, then the extension and retraction amount of the extension rod of the height control electric cylinder 102 is controlled, the distance between the part and the detection tube 123 can be controlled, according to the position of the inner cavity of the part, the detection contact ball 125 is installed on the detection tube 123 or the L-shaped extension rod 124 (used for extending the detection contact ball 125 into the inner cavity of the part) is additionally installed, the top servo motor 108 is controlled, the output shaft of the top servo motor 108 drives the top displacement lead screw 107 to rotate, 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 is arranged in parallel), at this time, the detection contact ball 125 can be controlled to move synchronously with the bottom displacement bracket 109, the bottom servo motor 110 is controlled, 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 sliding block 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 sliding block 112, the swing electric cylinder 120 is controlled, the extension 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 installation frame 121 to rotate and swing, the installation 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 direct current circuit), then the detection contact ball 125 is driven to move synchronously. The movement of the detection contact ball 125 will contact the inner cavity wall of the part, and the contact will cause the detection tube 123 to be bent and deformed (microscopically), during this process, the third mirror 140 and the fourth mirror 141 away from the installation frame 121 will move, which will cause the position of the light reflected by the fourth mirror 141 to the first mirror 138 to change, therefore, the position of the light reflected by the first mirror 138 to the inner light sensor 136 changes, at this time, the change of the light monitored by the inner light sensor 136 can know whether the detection contact ball 125 contacts the part, and the instantaneous position of the contact is the coordinate position of the size of the part. The setting angle of the third mirror 140 and the fourth mirror 141 is forty-five degrees in two directions (perpendicular to the horizontal plane).

[0026] In order to ensure the accuracy of the size detection, the speed of the detection contact ball 125 needs to be slowed down. When the speed is too fast or there is external vibration, the measurement accuracy will be affected. At this time, the external vibration will cause the whole to vibrate, and the surface of the distilled water in the transparent pool 126 will produce ripples. After the light passes through the transparent pool 126 into the water, it will be emitted from the surface of the distilled water to the inside 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 no longer shoots on the inside light sensor 136, but on the outside light sensor 135. Therefore, as long as the light source detected by the outside light sensor 135 can determine that the detection environment is vibrating. Before using the device, the light emitted by the laser emitter 128 needs to be calibrated so that the light can be vertically shot along the longitudinal direction to the second mirror piece 139 (forty-five degrees with the upper surface of the second mirror piece 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, the calibration lead screw 132 drives the concave lens support 142 to slide along the calibration slide rod 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, and then the angle of the light emitted by the concave lens 133 can be adjusted (when the laser emitter 128 is installed, the parallelism of one of the planes needs to be ensured, or two groups of concave lenses 133 and convex lenses 134 are used for calibration, and the two groups of concave lenses 133 and convex lenses 134 are arranged vertically).

Claims

1. An adaptive detection device for the internal cavity dimensions of irregularly shaped machined parts, characterized in that: Includes a detection tube (123), one end of which is fixedly installed with an L-shaped extension rod (124) or a detection contact ball (125) in a way that is easy to disassemble. When the detection tube (123) is fixedly engaged with the L-shaped extension rod (124), the detection contact ball (125) is fixedly engaged with the L-shaped extension rod (124) in a way that is easy to disassemble. The other end of the detection tube (123) is fixedly mounted on the mounting frame (121). The mounting frame (121) is equipped with a laser emitter (128), and an outer light sensor (135) and an inner light sensor (136) for detecting the light emitted by the laser emitter (128). The detection tube (123) is fixedly mounted with a first reflective lens (138), a second reflective lens (139), a third reflective lens (140), and a fourth reflective lens (141). The second reflective lens (139) is used to reflect the light emitted by the laser emitter (128) onto the third reflective lens (140). The third reflective lens (140) reflects the light onto the fourth reflective lens (141). The fourth reflective lens (141) reflects the light onto the first reflective lens (138). The first reflective lens (138) reflects the light onto the outer light sensor (135) and / or the inner light sensor (136). A light shield (122) is fixedly installed on the outside of the mounting frame (121). A transparent pool (126) is fixedly installed on both the light shield (122) and the inner wall of the mounting frame (121). A light sensor bracket (137) is fixedly and sealed 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 outside of the inner light sensor (136). The outer light sensor (135) and the inner light sensor (136) are concentrically arranged. Distilled water is placed inside the transparent pool (126). A laser emitter bracket (127) is fixedly installed on the outer surface of the transparent pool (126). A laser emitter (128) is fixedly installed on the laser emitter bracket (127). A convex lens holder (129) is also fixedly installed on the laser emitter bracket (127). A calibration slide rod (131) and a calibration motor (130) are fixedly installed on the convex lens holder (129). A concave lens holder (142) is slidably mounted on the calibration slide rod (131). A calibration lead screw (132) is fixedly installed on the output shaft of the calibration motor (130). The calibration lead screw (132) and the concave lens holder (142) are threadedly driven together. The mounting frame (121) is rotatably mounted on the bottom end of the vertical drop bar (113), and a swing drive shaft (117) is rotatably mounted at the axis of the vertical drop bar (113) to drive the mounting frame (121) to rotate and swing.

2. The adaptive detection device for the internal cavity dimensions of irregularly shaped machined parts according to claim 1, characterized in that: A convex lens (134) is fixedly installed on a convex lens holder (129), and a concave lens (133) is fixedly installed on a concave lens holder (142). The light emitted by the laser emitter (128) passes through the convex lens (134) and the concave lens (133) in sequence to correct the light emitted by the laser emitter (128) so that it can irradiate along the surface of the second reflective lens (139) at a 45-degree angle. The first reflective lens (138), the second reflective lens (139), the third reflective lens (140), and the fourth reflective lens (141) are all set at a 45-degree angle to the horizontal plane, and the axis of the detection tube (123) is set parallel to the horizontal plane.

3. The adaptive detection device for the internal cavity dimensions of irregularly shaped machined parts according to claim 2, characterized in that: The bottom end of the swing drive 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), the bottom displacement slider (112) is fixedly mounted with a swing electric cylinder (120), the telescopic rod end of the swing electric cylinder (120) is fixedly mounted with a rack (119), the top end of the swing drive shaft (117) extends above the swing electric cylinder (120), and the top end of the swing drive shaft (117) is fixedly mounted with a gear (118) that meshes with the rack (119).

4. The adaptive detection device for the internal cavity dimensions of irregularly shaped machined parts according to claim 3, characterized in that: A rotating detection disk (114) is fixedly installed on the top of the swing transmission shaft (117) or on the gear (118). An arc-shaped resistance strip (116) is provided on the circumferential surface of the rotating detection disk (114). A sliding conductive needle (115) that slides and conducts with the arc-shaped resistance strip (116) is fixedly installed on the inner side of the bottom displacement slider (112).

5. The adaptive detection device for the internal cavity dimensions of irregularly shaped machined parts according to claim 4, characterized in that: The bottom displacement slider (112) is slidably mounted on the bottom displacement bracket (109). The bottom servo motor (110) is fixedly mounted on the bottom displacement bracket (109). The bottom displacement screw (111) that rotates with the bottom displacement bracket (109) is fixedly mounted on the output shaft of the bottom servo motor (110). The bottom displacement screw (111) and the bottom displacement slider (112) are threadedly driven together.

6. The adaptive detection device for the internal cavity dimensions of irregularly shaped machined parts according to claim 5, 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 support side wall (104), and the top support frame (105) and the support side wall (104) are also rotatably mounted with a top displacement screw (107) that is threadedly driven to the bottom displacement bracket (109). The top displacement 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 support side wall (104).

7. The adaptive detection device for the internal cavity dimensions of irregularly shaped machined parts according to claim 6, characterized in that: The supporting side wall (104) is fixedly installed on the testing table (101). A height control electric cylinder (102) is fixedly installed on the lower surface of the testing table (101). The end of the telescopic rod of the height control electric cylinder (102) extends above the testing table (101), and a placement plate (103) is fixed to the end of the telescopic rod of the height control electric cylinder (102) for placing the parts to be tested.

Images