A cylinder liner inspection machine and an inspection method thereof

Abstract

The application discloses a cylinder sleeve detection machine and a detection method thereof, and relates to the field of detection equipment.The technical scheme is as follows: the detection machine comprises a rack, a rotating disc arranged on the rack, and a rotating driving assembly; a detection mechanism is arranged on one side of the rotating disc; a product loading platform is arranged on the rotating disc; a loading platform driving assembly for driving the product loading platform to rotate is arranged on one side of the detection mechanism; an upper feeding belt line is further arranged on the rack; an upper feeding module for taking and placing products on the upper feeding belt line to the product loading platform is arranged; a transfer belt line, a lower feeding belt line, a defective product frame, a lower feeding module for taking and placing products on the product loading platform to the transfer belt line, and a material guiding assembly for guiding products on the transfer belt line into the lower feeding belt line or the defective product frame are arranged on the rack.The application reduces the labor input and effectively improves the production efficiency.

Description

Technical Field

[0001] This invention relates to the field of testing equipment, and more specifically, to a cylinder liner testing machine and its testing method. Background Technology

[0002] A cylinder liner is a hollow cylindrical part placed inside the engine block cavity and pressed and fixed by the cylinder head. The piston reciprocates inside the cylinder liner, which is cooled by coolant.

[0003] Before cylinder liners leave the factory, their outer surface needs to be inspected to check for defects such as cracks and dents. Therefore, eddy current testing equipment is required to perform the inspection.

[0004] Chinese Patent Publication No. CN207866813U discloses an automatic cylinder liner inspection device. The key technical points of this device are: it includes a frame, within which a workpiece positioning device and a first driving mechanism for rotating the workpiece positioning device are installed; it also includes a sensor mounting bracket on which a first flaw detection sensor is mounted; and a second driving mechanism for vertically moving the sensor mounting bracket. When performing inspection, the automatic cylinder liner inspection device of this invention only requires placing the workpiece to be inspected into the workpiece positioning device. The workpiece positioning device drives the workpiece to rotate, at which point the first flaw detection sensor gradually extends into the cylinder liner to detect scratches on the side surface of the rotating workpiece.

[0005] Although the above method enables the inspection of the cylinder liner's outer surface, it requires manual installation of the cylinder liner onto the workpiece positioning device, resulting in low automation and low work efficiency.

[0006] Therefore, a new solution is needed to address this problem. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the present invention aims to provide a cylinder liner inspection machine and its inspection method, which reduces the input of manual labor and effectively improves production efficiency.

[0008] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a cylinder liner inspection machine, comprising a frame, a turntable mounted on the frame, and a rotary drive assembly for driving the turntable to rotate. A detection mechanism for inspecting the outer surface of a product is provided on one side of the turntable on the frame. A product platform is provided on the turntable. A platform drive assembly for driving the product platform to rotate is provided on one side of the detection mechanism on the frame. The platform drive assembly is configured to drive the product platform to rotate when the product platform passes the detection mechanism. The frame also includes a feeding conveyor belt, a feeding module for picking up and placing products from the feeding conveyor belt onto the product platform, a transfer conveyor belt, a discharge conveyor belt, a defective product frame, a discharge module for picking up and placing products from the product platform onto the transfer conveyor belt, and a guide assembly for guiding products from the transfer conveyor belt onto the discharge conveyor belt or into the defective product frame.

[0009] In one embodiment, the product platform is configured as a plurality of such platforms, which are arranged in a circular array along the circumference of the product.

[0010] In one embodiment, the detection mechanism includes a first bracket fixed to a frame, an X-axis linear module, and a second bracket fixed to the output end of the X-axis linear module. The second bracket is located below and inside the first bracket. A Y-axis linear module is fixed on the first bracket, and a Z-axis linear module is fixed to the output end of the Y-axis linear module. An upper end face eddy current detection probe is disposed on the output end of the Z-axis linear module. An outer circumferential eddy current detection probe is disposed on the second bracket. Multiple outer circumferential eddy current detection probes are arranged side by side along the longitudinal direction, and the length of the line connecting the diameters of the multiple outer circumferential eddy current detection probes is equal to the height of the product. The turntable is provided with a connecting frame, and the product platform is rotatably connected to the connecting frame via a rotating shaft. The platform drive assembly includes a driven wheel fixed on the rotating shaft, a slide cylinder fixed on the frame, a drive seat set on the output end of the slide cylinder, a drive wheel set on the drive seat, and a drive motor fixed on the drive seat. A first pulley is fixed on the output end of the drive motor. A drive shaft is rotatably connected to the drive seat. The drive wheel is fixed to one end of the drive shaft, and a second pulley is fixedly connected to the other end of the drive shaft. A synchronous belt is connected between the first pulley and the second pulley. The drive wheel can abut against the driven wheel.

[0011] In one embodiment, a first fixing block and a second fixing block are fixedly connected to the output end of the slide cylinder. The first fixing block is located on the side away from the rotating shaft. A guide shaft is fixedly connected between the first fixing block and the second fixing block. A slider is fixedly connected to the guide shaft. The drive seat is fixedly connected to the slider. A spring is sleeved on the guide shaft between the slider and the first fixing block.

[0012] In one embodiment, a transfer assembly is provided on the frame between the feeding conveyor belt and the feeding module. The transfer assembly includes a transfer platform with a product receiving groove on it. The transfer assembly also includes a transfer seat with a transfer linear module for driving the transfer platform to move so that the product receiving groove is aligned with the feeding conveyor belt. A friction plate is provided at the bottom of the product receiving groove on the transfer platform. The feeding module includes a first rotary cylinder fixed on the frame, a support frame fixed on the output end of the rotary cylinder, a lifting frame slidably connected to the support frame, and a lifting cylinder for driving the lifting frame to move vertically. A second rotary cylinder is fixed on one side of the lifting frame, and a flip plate is fixed on the output end of the second rotary cylinder. The end of the flip plate away from the second rotary cylinder is rotatably connected to the other side of the lifting frame, and a cylinder gripper is fixed on the flip plate.

[0013] In one embodiment, the material guiding assembly includes a connecting angle plate disposed between the feeding conveyor belt and the unloading conveyor belt, a third rotary cylinder fixed on the connecting angle plate, and a material guiding trough fixed on the output end of the third rotary cylinder. One end of the material guiding trough is connected to the conveying end of the feeding conveyor belt, and the other end of the material guiding trough can be deflected between the conveying beginning of the unloading conveyor belt or the defective material frame.

[0014] In one embodiment, both sides of the feeding conveyor belt and the unloading conveyor belt are provided with baffles.

[0015] In one embodiment, a method for testing cylinder liners using a testing machine includes the following steps:

[0016] S1. The product enters one side of the feeding module from the feeding belt, and the feeding module picks up and places the product on the product platform from the feeding belt.

[0017] S2. The rotary drive assembly drives the turntable to rotate, so as to move the product directly under the testing mechanism;

[0018] S3. After completing step S2, the stage drive assembly moves closer to the product stage and drives the product stage to rotate in order to cooperate with the testing mechanism to complete the outer surface testing of the product.

[0019] S4. The unloading module picks up and places the inspected products onto the transfer conveyor belt;

[0020] S5. If the product is found to be good, the material guide component connects between the transfer belt and the unloading belt, and the product enters the unloading belt and is conveyed to the next station.

[0021] S6. If a product is found to be defective, the guide assembly connects the transfer belt and the defective product box, and the product falls into the defective product box.

[0022] In summary, the present invention has the following beneficial effects: By setting up a feeding conveyor belt, a feeding module, a turntable, a detection mechanism, a transfer conveyor belt, a discharge conveyor belt, a defective product box, and a guiding component, the present invention realizes automatic product feeding, detection, and sorting and discharge of good and defective products, reducing the input of manual labor and effectively improving production efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a cylinder liner inspection machine according to an embodiment of this application;

[0024] Figure 2 This is a schematic diagram of the testing mechanism in the cylinder liner testing machine according to an embodiment of this application;

[0025] Figure 3 This is a schematic diagram of the stage drive assembly in the cylinder liner testing machine according to an embodiment of this application;

[0026] Figure 4 This is a schematic diagram of the transfer component in the cylinder liner testing machine according to an embodiment of this application;

[0027] Figure 5 This is a schematic diagram of the feeding module in the cylinder liner testing machine according to an embodiment of this application;

[0028] Figure 6 This is a schematic diagram of the material guiding assembly in the cylinder liner inspection machine according to an embodiment of this application.

[0029] In the diagram: 1. Frame; 2. Feeding conveyor belt; 3. Transfer assembly; 31. Transfer seat; 32. Transfer linear module; 33. Transfer platform; 34. Friction plate; 4. Feeding module; 41. First rotary cylinder; 42. Support frame; 43. Lifting frame; 44. Lifting cylinder; 45. Second rotary cylinder; 46. Tilting plate; 47. Cylinder gripper; 5. Turntable; 6. Product platform; 7. Detection mechanism; 71. First bracket; 72. X-axis linear module; 73. Second bracket; 74. Y-axis linear module; 75. Z-axis linear module; 76. Upper end face eddy current detection probe; 77. Outer circumferential surface eddy current detection probe; 8. Unloading module; 9. Transfer belt conveyor; 10. Unloading belt conveyor; 11. Material guiding assembly; 111. Third rotary cylinder; 112. Material guide chute; 12. Defective material frame; 13. Platform drive assembly; 131. Slide cylinder; 132. First fixing block; 133. Second fixing block; 134. Guide shaft; 135. Slider; 136. Spring; 137. Drive seat; 138. Driving wheel; 139. Driven wheel; 14. Connecting frame; 15. Rotating shaft. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figure 1 and Figure 6 As shown, an embodiment of this application provides a cylinder liner inspection machine, including a frame 1, a turntable 5 mounted on the frame 1, and a rotary drive assembly for driving the turntable 5 to rotate. The rotary drive assembly can be a geared motor. A detection mechanism 7 for inspecting the outer surface of a product is provided on one side of the turntable 5 on the frame 1. A product stage 6 is provided on the turntable 5. A stage drive assembly 13 for driving the product stage 6 to rotate is provided on one side of the detection mechanism 7 on the frame 1. The stage drive assembly 13 is configured to drive the product stage 6 to rotate when the product stage 6 passes the detection mechanism 7. The frame 1 is also equipped with a feeding conveyor belt 2, a feeding module 4 for picking up and placing products from the feeding conveyor belt 2 onto the product platform 6, a transfer conveyor belt 9, a discharge conveyor belt 10, a defective product frame 12, a discharge module 8 for picking up and placing products from the product platform 6 onto the transfer conveyor belt 9, and a guide component 11 for guiding products from the transfer conveyor belt 9 onto the discharge conveyor belt 10 or into the defective product frame 12.

[0032] When the above-mentioned inspection machine is working, the product enters from the feeding belt 2 to one side of the feeding module 4. The feeding module 4 picks up and places the product on the feeding belt 2 onto the product platform 6. The rotation drive component drives the turntable 5 to rotate, so as to move the product directly below the inspection mechanism 7. The platform drive component 13 moves closer to the product platform 6 and drives the product platform 6 to rotate, so as to cooperate with the inspection mechanism 7 to complete the outer surface inspection of the product. The unloading module 8 picks up and places the inspected product onto the transfer belt 9. If the product is inspected as good, the guide component 11 connects between the transfer belt 9 and the unloading belt 10, and the product enters the unloading belt 10 and is transported to the next station. If the product is inspected as defective, the guide component 11 connects between the transfer belt 9 and the defective product frame 12, and the product falls into the defective product frame 12.

[0033] The above method, through the setting of feeding belt 2, feeding module 4, turntable 5, detection mechanism 7, transfer belt 9, unloading belt 10, defective product box 12 and guiding component 11, realizes automatic product feeding, detection and sorting of good and defective products, reduces the input of manual labor and effectively improves production efficiency.

[0034] In this embodiment, the product platform 6 is configured as a plurality of such platforms, which are arranged in a circular array along the circumference of the product.

[0035] In the above method, by setting up several product platforms 6, there are always product platforms 6 on the turntable 5 located in the working area of ​​the feeding module 4, the detection mechanism 7 and the unloading module 8. There is no need to stop and wait during operation, which can effectively improve the efficiency of product detection.

[0036] In this embodiment, as Figure 2 and Figure 3 As shown, the testing mechanism 7 includes a first bracket 71 fixed on the frame 1, an X-axis linear module 72, and a second bracket 73 fixed on the output end of the X-axis linear module 72. The second bracket 73 is located below the inner side of the first bracket 71. A Y-axis linear module 74 is fixed on the first bracket 71. A Z-axis linear module 75 is fixed on the output end of the Y-axis linear module 74. An upper end face eddy current detection probe 76 is provided on the output end of the Z-axis linear module 75. An outer circumferential eddy current detection probe 77 is provided on the second bracket 73. Multiple outer circumferential eddy current detection probes 77 are arranged side by side along the longitudinal direction. The length of the line connecting the diameters of the multiple outer circumferential eddy current detection probes 77 is equal to the height of the product.

[0037] A connecting frame 14 is provided through the turntable 5, and the product platform 6 is rotatably connected to the connecting frame 14 via a rotating shaft 15.

[0038] The platform drive assembly 13 includes a driven wheel 139 fixed on a rotating shaft 15, a slide cylinder 131 fixed on a frame 1, a drive seat 137 disposed on the output end of the slide cylinder 131, a drive wheel 138 disposed on the drive seat 137, and a drive motor fixed on the drive seat 137. A first pulley is fixed on the output end of the drive motor. A drive shaft is rotatably connected to the drive seat 137. The drive wheel 138 is fixed to one end of the drive shaft. A second pulley is fixedly connected to the other end of the drive shaft. A synchronous belt is connected between the first pulley and the second pulley. The drive wheel 138 can abut against the driven wheel 139.

[0039] When the aforementioned testing mechanism 7 is working, the Z-axis linear module 75 drives the upper end face eddy current detection probe 76 to make gap contact with the upper end face of the product, the stage drive assembly 13 drives the product to rotate, the Y-axis linear module 74 drives the upper end face eddy current detection probe 76 to move along the linear direction of the product, so that the upper end face eddy current detection probe 76 can sweep across the entire upper end face of the product, the X-axis linear module 72 drives the outer circumferential surface eddy current detection probe 77 to make gap contact with one side of the outer circumferential surface of the product, and the length of the line connecting the diameters of multiple outer circumferential surface eddy current detection probes 77 is equal to the height of the product. When the product rotates one revolution, the detection of the entire outer circumferential surface of the product can be completed. When the aforementioned stage drive assembly 13 is working, the slide cylinder 131 drives the drive seat 137 to move toward the driven wheel 139, so that the driving wheel 138 and the driven wheel 139 make frictional contact. When the drive motor drives the driving wheel 138 to rotate, it can drive the driven wheel 139 to rotate.

[0040] In the above method, the entire outer surface of the product can be inspected by setting the upper end face eddy current detection probe 76 and the outer circumferential surface eddy current detection probe 77. It has the advantages of simple structure and high detection accuracy. By setting the stage drive assembly 13, it is not necessary to set an independent rotation drive force for each product stage 6, which reduces the use of parts and helps to reduce the production cost of the inspection machine.

[0041] In this embodiment, a first fixing block 132 and a second fixing block 133 are fixedly connected to the output end of the slide cylinder 131. The first fixing block 132 is located on the side away from the rotating shaft 15. A guide shaft 134 is fixedly connected between the first fixing block 132 and the second fixing block 133. A slider 135 is fixedly connected to the guide shaft 134. The drive seat 137 is fixedly connected to the slider 135. A spring 136 is sleeved on the guide shaft 134 between the slider 135 and the first fixing block 132.

[0042] Specifically, the guide shafts 134 are arranged in parallel as two shafts. During operation, the spring 136 will press the slider 135 against the driven wheel 139.

[0043] In the above method, the driving wheel 138 and the driven wheel 139 are subjected to the clamping force of the spring 136, which makes it less likely for the driving wheel 138 and the driven wheel 139 to slip and cause transmission failure.

[0044] In this embodiment, as Figure 4 and Figure 5As shown, a transfer assembly 3 is provided on the frame 1 between the feeding conveyor belt 2 and the feeding module 4. The transfer assembly 3 includes a transfer platform 33, on which two product receiving slots are provided. The transfer assembly 3 also includes a transfer base 31, on which a transfer linear module 32 is provided to drive the transfer platform 33 to move so that the product receiving slots are aligned with the feeding conveyor belt 2. The transfer linear module 32 is fixed on the transfer base 31, and the transfer platform 33 is fixed on the output end of the transfer linear module 32. A friction plate 34 is provided on the transfer platform 33 at the bottom of the product receiving slots.

[0045] The loading module 4 includes a first rotary cylinder 41 fixed on the frame 1, a support frame 42 fixed on the output end of the rotary cylinder, a lifting frame 43 longitudinally slidably connected to the support frame 42, and a lifting cylinder 44 for driving the lifting frame 43 to move longitudinally. A second rotary cylinder 45 is fixed to one side of the lifting frame 43, and a flip plate 46 is fixed to the output end of the second rotary cylinder 45. The end of the flip plate 46 away from the second rotary cylinder 45 is rotatably connected to the other side of the lifting frame 43. A cylinder gripper 47 is fixed on the flip plate 46. It should be noted that the unloading module 8 has the same structure as the loading module 4, and the specific structure of the unloading module 8 will not be described in detail in this embodiment.

[0046] When the aforementioned transfer component 3 is working, the transfer linear module 32 drives any one of the product receiving slots to align with the feeding conveyor belt 2. The product enters the product receiving slot from the feeding conveyor belt 2. The flipping plate 46 drives the cylinder gripper 47 to flip downward. After the cylinder gripper 47 grabs the product in the finished product receiving slot, the lifting cylinder 44 drives the lifting frame 43 to rise. The first rotary cylinder 41 drives the lifting frame 43 to rotate 180 degrees. The flipping plate 46 drives the cylinder gripper 47 to flip to a horizontal state. The lifting frame 43 descends to press the product onto the product platform 6.

[0047] In the above method, the product receiving groove can guide and correct the product, so that the cylinder gripper 47 can accurately grasp the product. The friction plate makes it less likely for the product to slip off.

[0048] In this embodiment, as Figure 6 As shown, the material guiding assembly 11 includes a connecting angle plate disposed between the feeding conveyor belt 2 and the unloading conveyor belt 10, a third rotary cylinder 111 fixed on the connecting angle plate, and a material guiding trough 112 fixed on the output end of the third rotary cylinder 111. One end of the material guiding trough 112 is connected to the conveying end of the feeding conveyor belt 2, and the other end of the material guiding trough 112 can be deflected between the conveying beginning end of the unloading conveyor belt 10 or the defective material frame 12.

[0049] When the above-mentioned material guiding component 11 is working, the product can be sent to the defective product frame 12 or the unloading conveyor belt 10 by driving the material guiding groove 112 to deflect through the third rotary cylinder 111. It has the advantages of simple structure and high efficiency in sorting good or defective products.

[0050] In this embodiment, both sides of the feeding conveyor belt 2 and the unloading conveyor belt 10 are respectively provided with stops. The stops guide the product conveying and prevent the product from slipping during conveying.

[0051] Another embodiment of this application provides a method for testing cylinder liner using a testing machine, comprising the following steps:

[0052] S1. The product enters one side of the feeding module 4 from the feeding belt 2. The feeding module 4 picks up and places the product on the feeding belt 2 onto the product platform 6.

[0053] S2. The rotary drive assembly drives the turntable 5 to rotate, so as to move the product directly below the inspection mechanism 7;

[0054] S3. After completing step S2, the stage drive assembly 13 moves closer to the product stage 6 and drives the product stage 6 to rotate, so as to cooperate with the detection mechanism 7 to complete the outer surface detection of the product.

[0055] S4. The unloading module 8 picks up and places the inspected products onto the transfer belt 9.

[0056] S5. If the product is found to be good, the material guide assembly 11 is connected between the transfer belt 9 and the unloading belt 10, and the product enters the unloading belt 10 and is conveyed to the next station.

[0057] S6. If the product is found to be defective, the guide assembly 11 is connected between the transfer belt 9 and the defective product frame 12, and the product falls into the defective product frame 12.

[0058] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A cylinder liner testing machine, comprising a frame (1), a turntable (5) mounted on the frame (1), and a rotary drive assembly for driving the turntable (5) to rotate, characterized in that: A detection mechanism (7) for inspecting the outer surface of a product is provided on one side of the turntable (5) on the frame (1). A product platform (6) is provided on the turntable (5). A platform drive assembly (13) for driving the product platform (6) to rotate is provided on one side of the detection mechanism (7) on the frame (1). The platform drive assembly (13) is configured to drive the product platform (6) to rotate when the product platform (6) passes the detection mechanism (7). A feeding conveyor belt is also provided on the frame (1). (2) A loading module (4) for picking up and placing products from the loading conveyor (2) onto the product platform (6), a transfer conveyor (9), a unloading conveyor (10), a defective product frame (12), an unloading module (8) for picking up and placing products from the product platform (6) onto the transfer conveyor (9), and a guide assembly (11) for guiding products from the transfer conveyor (9) onto the unloading conveyor (10) or into the defective product frame (12); The detection mechanism (7) includes a first bracket (71) fixed on the frame (1), an X-axis linear module (72), and a second bracket (73) fixed on the output end of the X-axis linear module (72). The second bracket (73) is located below the inner side of the first bracket (71). A Y-axis linear module (74) is fixed on the first bracket (71). A Z-axis linear module (75) is fixed on the output end of the Y-axis linear module (74). An upper end face eddy current detection probe (76) is provided on the output end of the linear module (75), and an outer circumferential eddy current detection probe (77) is provided on the second bracket (73). Multiple outer circumferential eddy current detection probes (77) are arranged in parallel along the longitudinal direction. The length of the line connecting the diameters of the multiple outer circumferential eddy current detection probes (77) is equal to the height of the product. A connecting frame (14) is provided through the turntable (5). The product platform (6) is rotatably connected to the connecting frame (14) through a rotating shaft (15). The platform drive assembly (13) includes a driven wheel (139) fixed on the rotating shaft (15) and a fixed... A slide cylinder (131) is fixed on the frame (1), a drive seat (137) is set on the output end of the slide cylinder (131), a drive wheel (138) is set on the drive seat (137), and a drive motor is fixed on the drive seat (137). A first pulley is fixed on the output end of the drive motor. A drive shaft is rotatably connected to the drive seat (137). The drive wheel (138) is fixed at one end of the drive shaft. A second pulley is fixedly connected to the other end of the drive shaft. A synchronous belt is connected between the first pulley and the second pulley. The drive wheel (138) can abut against the driven wheel (139).A transfer assembly (3) is provided on the frame (1) between the feeding conveyor belt (2) and the feeding module (4). The transfer assembly (3) includes a transfer platform (33) with a product receiving groove. The transfer assembly (3) also includes a transfer base (31) with a transfer linear module (32) for driving the transfer platform (33) to move so that the product receiving groove is aligned with the feeding conveyor belt (2). A friction plate (34) is provided on the transfer platform (33) at the bottom of the product receiving groove. The feeding module (4) includes components fixed to the frame. (1) A first rotary cylinder (41), a support frame (42) fixed to the output end of the rotary cylinder, a lifting frame (43) longitudinally slidably connected to the support frame (42), and a lifting cylinder (44) for driving the lifting frame (43) to rise and fall longitudinally. A second rotary cylinder (45) is fixed to one side of the lifting frame (43). A flip plate (46) is fixed to the output end of the second rotary cylinder (45). The end of the flip plate (46) away from the second rotary cylinder (45) is rotatably connected to the other side of the lifting frame (43). A cylinder gripper (47) is fixed on the flip plate (46).

2. The cylinder liner testing machine according to claim 1, characterized in that: The product platform (6) is configured as a plurality of such platforms, which are arranged in a circular array along the circumference of the product.

3. The cylinder liner testing machine according to claim 1, characterized in that: A first fixing block (132) and a second fixing block (133) are fixedly connected to the output end of the slide cylinder (131). The first fixing block (132) is located on the side away from the rotating shaft (15). A guide shaft (134) is fixedly connected between the first fixing block (132) and the second fixing block (133). A slider (135) is fixedly connected to the guide shaft (134). The drive seat (137) is fixedly connected to the slider (135). A spring (136) is sleeved on the guide shaft (134) between the slider (135) and the first fixing block (132).

4. The cylinder liner testing machine according to claim 1, characterized in that: The material guiding assembly (11) includes a connecting angle plate disposed between the feeding belt (2) and the unloading belt (10), a third rotary cylinder (111) fixed on the connecting angle plate, and a material guiding trough (112) fixed on the output end of the third rotary cylinder (111). One end of the material guiding trough (112) is connected to the conveying end of the feeding belt (2), and the other end of the material guiding trough (112) can be deflected between the conveying beginning of the unloading belt (10) or the defective material frame (12).

5. The cylinder liner testing machine according to claim 1, characterized in that: Both sides of the feeding conveyor belt (2) and the unloading conveyor belt (10) are respectively provided with baffles.

6. The testing method of the cylinder liner testing machine as described in any one of claims 1-5, characterized in that: Includes the following steps: S1. The product enters one side of the feeding module (4) from the feeding belt (2). The feeding module (4) picks up and places the product on the feeding belt (2) onto the product platform (6). S2. The rotary drive assembly drives the turntable (5) to rotate, thereby moving the product to the testing mechanism (7). Directly below; S3. After completing step S2, the stage drive assembly (13) moves closer to the product stage (6) and drives the product stage (6) to rotate, so as to cooperate with the detection mechanism (7) to complete the outer surface detection of the product. S4. The unloading module (8) picks up and places the inspected products onto the transfer belt (9); S5. If the product is found to be good, the guide assembly (11) is connected between the transfer belt (9) and the unloading belt (10), and the product enters the unloading belt (10) and is transported to the next station. S6. If the product is found to be defective, the guide assembly (11) is connected between the transfer belt (9) and the defective product box (12), and the product falls into the defective product box (12).

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