Engine cylinder block and cylinder head visual inspection device and method

Abstract

The application discloses an engine cylinder body and cylinder cover visual detection device and detection method, which comprises a roller type conveying line and a detection workbench, the upper and lower sides of the detection workbench are provided with visual detection mechanisms, the detection workbench is provided with a lifting opening, the detection workbench is provided with a limiting mechanism around the lifting opening, the lower side of the conveying line is provided with a first jacking mechanism, the detection device further comprises a carrying mechanism and a second jacking mechanism, the carrying mechanism is used for conveying products to the second jacking mechanism, the second jacking mechanism drives the products to move vertically downward until the products to be detected fall into the limiting mechanism for limiting, the carrying automation of the products to be detected is realized, the cylinder body and cylinder cover do not need to be turned over, the upper and lower sides of the cylinder body and cylinder cover are exposed outside, the visual detection in all directions is facilitated, and the image analysis mechanism is used for judging whether the products are qualified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of visual detection, in particular to an engine cylinder block and cylinder head visual detection device and detection method. BACKGROUND

[0002] The engine cylinder block and cylinder head is one of the most critical parts of the engine, which has high precision requirements and complex processing technology. The quality of processing directly affects the overall performance and quality of the engine. The detection of the key parts such as valve seat ring and guide pipe hole is also an important link. The defects usually cannot be found by the naked eye. Therefore, how to efficiently and accurately detect the product unqualified problems caused by factors such as size, shape and surface defects of the engine cylinder block and cylinder head is crucial.

[0003] The Chinese patent with application number 202110987929.8 discloses a composite stabilizer bar assembly flaw detection detection production line and its detection method, which includes a workbench, movable insertion rods are installed at both ends of the workbench, an endoscope probe is installed at the insertion rod, one side of the workbench is the feeding side, the other side is provided with an appearance detection workbench, a circulating conveyor belt one is installed on the appearance detection workbench, a photographing detection system is erected above the middle part of the circulating conveyor belt one, a turnover receiving station is provided at the discharge end of the circulating conveyor belt one, a rod turnover mechanism for turning over the stabilizer bar is installed on the turnover receiving station, a circulating conveyor belt two is installed below the rod turnover mechanism, and a photographing detection system is also erected above the middle part of the circulating conveyor belt two. The need for intelligent semi-automatic detection is realized.

[0004] The above patent has the following disadvantages:

[0005] The composite stabilizer bar is manually clamped on the workbench for internal control detection. If the internal hole detection is qualified, the qualified internal hole stabilizer bar is manually placed on the appearance detection workbench for further detection. The detection still relies on manual operation and can only achieve semi-automatic detection, which is low in efficiency. The composite stabilizer bar conveyed by the turnover receiving station is directly turned over, and then directly falls onto the circulating conveyor belt two, which is conveyed to the photographing detection system for detection of the other side. The direct turnover method is not conducive to the positioning of the product, and is not suitable for heavy products such as engine cylinder blocks and cylinder heads.

[0006] The present application provides an engine cylinder block and cylinder head visual detection device and detection method, which realizes full automation, can perform omnidirectional visual detection without turning over the product, is accurate in positioning, and is conducive to improving the detection efficiency.

[0007] In order to achieve the above object, the present application provides the following technical scheme: An engine cylinder block and cylinder head visual detection device, comprising a conveying line and a detection workbench arranged beside the conveying line, the conveying line is a roller type and is provided with a roller gap, the detection workbench is provided with a lifting opening, and a limiting mechanism is arranged around the lifting opening for limiting the product to be detected; the detection device further comprises a first jacking mechanism, the first jacking mechanism jacks up the product to be detected through the roller gap, and is used for jacking up the product to be detected from a first position to a second position; the detection device further comprises a carrying mechanism and a second jacking mechanism, the carrying mechanism is used for carrying the product to be detected located at the second position to a third position, the second jacking mechanism transports the product to be detected located at the third position to the limiting mechanism through the lifting opening to limit the product to be detected, so that the upper half of the product to be detected is exposed to a first detection space, and the lower half of the product to be detected is exposed to a second detection space, and the detection device further comprises a visual detection mechanism, which is used for acquiring image information of the first detection space and the second detection space.

[0008] Preferably, the first jacking mechanism comprises a first jacking cylinder, and a jacking support plate is fixed to the output end of the first jacking cylinder, and a plurality of first roller groups are arranged on the jacking support plate, and the plurality of first roller groups are matched with adjacent roller gaps.

[0009] Preferably, a stopping mechanism is arranged beside the first jacking mechanism, the stopping mechanism comprises a stopping cylinder and a stopping plate, and the stopping cylinder drives the stopping plate to move back and forth in the vertical direction through the roller gap.

[0010] Preferably, the second jacking mechanism comprises a second jacking cylinder and a second roller group, the second jacking cylinder drives the second roller group to move back and forth in the vertical direction through the lifting opening, and a third roller group is further arranged on the upper side of the detection workbench, the first roller group after jacking and the second roller group are all connected with the third roller group and are located on the same horizontal line.

[0011] Preferably, the carrying mechanism comprises a carrying cylinder, a guide rail and a pushing horizontal plate, the carrying cylinder drives the pushing horizontal plate to slide on the guide rail, a push-pull assembly is arranged at the lower end of the pushing horizontal plate, the carrying cylinder drives the product to be detected to pass through the third roller group and the second roller group in turn, and a stop block is arranged at the tail end of the second roller group.

[0012] Preferably, a driving cylinder and a hook are arranged on the pushing horizontal plate, after detection, the driving cylinder drives the hook to move vertically downward to hook the cylinder block and cylinder head, and at the same time, the carrying cylinder drives the horizontal plate to move away from the detection workbench.

[0013] Preferably, the limiting mechanism comprises X limiting rods, Y limiting rods and Z limiting rods, which are used to limit the freedom of the product to be detected in X, Y and Z directions respectively, and the limiting mechanism further comprises a plurality of beating air cylinders, which clamp and limit the product to be detected after being limited.

[0014] Preferably, the visual detection mechanism comprises a driving assembly, a plurality of industrial cameras and a plurality of endoscopes, the plurality of industrial cameras and the plurality of endoscopes are distributed on the upper and lower sides of the detection workbench, the plurality of industrial cameras acquire appearance image information of the product to be detected, and the driving assembly drives the plurality of endoscopes to take pictures and collect deep recess parts of the product to be detected.

[0015] Preferably, the detection device further comprises an image analysis mechanism and a sensor, the product to be detected is attached with a two-dimensional code, the sensor is used to identify the two-dimensional code, and the visual detection mechanism is connected with the image analysis mechanism.

[0016] The engine cylinder block and cylinder head visual detection device and the detection method are as follows:

[0017] S1. The roller type conveying line conveys the product to be detected to the side of the detection workbench, the stopping air cylinder drives the stopping plate to move vertically upward through the roller gap, until the stopping plate stops the product to be detected in the conveying line, and the first lifting air cylinder drives the first roller set to move vertically upward through the roller gap to lift the product to be detected and separate it from the conveying line;

[0018] S2. The second lifting air cylinder drives the second roller set to move vertically upward, until the first roller set and the second roller set after being lifted are connected with the third roller set, the carrying air cylinder drives the pushing plate to slide on the guide rail towards the detection workbench, and the push-pull assembly pushes the product to be detected to slide onto the second roller set and be stopped by the stopper at the end of the second roller set;

[0019] S3. The second lifting mechanism drives the second roller set to move vertically downward, until the product to be detected falls into the limiting mechanism for limiting;

[0020] S4. The plurality of industrial cameras acquire appearance image information of the product to be detected, the driving assembly drives the plurality of endoscopes to take pictures and collect deep recess parts of the product to be detected, the sensor identifies the two-dimensional code to acquire processing technology information of the product to be detected, and the image analysis mechanism processes the acquired image information to determine whether it is qualified;

[0021] S5. After the detection is completed, the limiting mechanism releases the product to be detected, the second lifting mechanism drives the second roller set to lift the product to be detected, the driving air cylinder drives the hook to move vertically downward to hook the cylinder block and cylinder head, and the carrying mechanism carries the product back to the conveying line to the next process in the opposite path.

[0022] Compared with the prior art, the present application has the beneficial effects that:

[0023] The first lifting cylinder drives the first roller set to move vertically upward through the drum gap to lift the product to be detected, so as to separate it from the conveying line, the second lifting cylinder drives the second roller set to move vertically upward until the first roller set and the second roller set after lifting are connected with the third roller set, the carrying cylinder drives the pushing plate to slide on the guide rail towards the detection workbench, and the push-pull assembly pushes the product to be detected to slide onto the second roller set, the second lifting mechanism drives the second roller set to move vertically downward until the product to be detected falls into the limiting mechanism for limiting, so as to realize the carrying automation of the product to be detected, without the need to turn over the cylinder head, so that the upper and lower sides of the cylinder head are exposed outside for facilitating omnidirectional visual detection.

[0024] The X limiting rod, the Y limiting rod and the Z limiting rod respectively limit the degrees of freedom in X, Y and Z directions, the beating cylinder clamps and limits the cylinder head after limiting, and the positioning is accurate; the industrial cameras are distributed in front, back, left, right, upper and lower six dimensions of the cylinder head, so that the appearance and size information in the 360° range of the appearance of the cylinder head can be obtained; the driving assembly drives the endoscopes to respectively take photos and collect the inner holes and deep recessed parts of the top, bottom and side directions of the cylinder head, the collected image information is comprehensive, and the detection effect is further improved.

[0025] The present application sets up a visual detection mechanism and an image analysis mechanism, and a two-dimensional code is attached to each product, when detecting, the photos collected by the industrial cameras and the endoscopes are transmitted to the image analysis mechanism for image processing and operation to judge whether the product is qualified; the casting batch number is obtained by identifying the product two-dimensional code, and the production environment of the batch number casting and the detection result of the defect this time are integrated to analyze the potential causes of the defect, so that the casting production parameters can be continuously optimized to avoid the generation of defects from the source. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 It is a whole structure schematic view of the engine cylinder head visual detection device of the present application;

[0027] Figure 2 It is a position relation view of the carrying mechanism and the first lifting mechanism of the engine cylinder head visual detection device of the present application;

[0028] Figure 3 It is a position relation view of the first lifting mechanism and the stopping mechanism of the engine cylinder head visual detection device of the present application;

[0029] Figure 4 This is a schematic diagram of the inspection workbench of the engine cylinder block and cylinder head visual inspection device of the present invention;

[0030] Figure 5 This is a schematic diagram of the transport mechanism structure of the engine block and cylinder head visual inspection device of the present invention;

[0031] Figure 6 This is a schematic diagram of the limiting mechanism of a visual inspection device for engine block and cylinder head according to the present invention.

[0032] In the diagram: 1. Conveyor line; 11. Position sensor; 2. Inspection workbench; 21. Lifting port; 22. Third roller group; 23. Supplementary light; 3. Limiting mechanism; 31. X-limiting rod; 32. Y-limiting rod; 33. Z-limiting rod; 34. Tapping cylinder; 4. First lifting mechanism; 41. First lifting cylinder; 42. Lifting support plate; 43. First roller group; 5. Transporting mechanism; 51. Transporting cylinder; 52. Guide rail; 53. Pushing cross plate; 54. Push-pull assembly; 55. Hook; 6. Second lifting mechanism; 61. Second lifting cylinder; 62. Second roller group; 621. Stop block; 7. Stopping mechanism; 71. Stopping cylinder; 72. Stopping plate; 8. Industrial camera; 81. Top endoscope; 82. Bottom endoscope; 83. Side endoscope. Detailed Implementation

[0033] 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.

[0034] like Figure 1 and Figure 2 As shown, an engine block and cylinder head visual inspection device includes a conveyor line and an inspection workbench disposed beside the conveyor line. The conveyor line is a roller type and has roller gaps. The inspection workbench has a lifting port and a limit mechanism is disposed around the lifting port. The limit mechanism is used to limit the product to be inspected.

[0035] like Figure 3As shown, the first jacking mechanism 4 comprises a first jacking cylinder 41, the output end of the first jacking cylinder 41 is fixed with a jacking support plate 42, a plurality of first roller groups 43 are arranged on the jacking support plate 42, the plurality of first roller groups 43 are matched with adjacent drum gaps, and the first roller groups 43 are arranged to be not less than 3 groups; a stopping mechanism 7 is arranged beside the first jacking mechanism 4, the stopping mechanism 7 comprises a stopping cylinder 71 and a stopping plate 72, the stopping cylinder 71 drives the stopping plate 72 to move back and forth in the vertical direction through the drum gap. A plurality of position sensors 11 are arranged on the conveying line 1, when the drum conveying line 1 conveys the product to be detected to the side of the detection workbench 2, the stopping cylinder 71 drives the stopping plate 72 to move vertically upward through the drum gap until the stopping plate 72 stops the product to be detected in the conveying, at this time the cylinder head is located at the first position, the first jacking mechanism 4 is located directly below the product to be detected, the first jacking cylinder 41 drives the first roller groups 43 to move vertically upward through the drum gap to jack up the product to be detected, so that it is separated from the conveying line 1, and the cylinder head is located at the second position.

[0036] Specifically, the stopping mechanism 7 is arranged in a plurality of groups, and stops the adjacent products to be detected on the conveying line 1 respectively, so that the motion paths of the adjacent products to be detected do not conflict, and are always equidistant.

[0037] Further, as shown in Figure 4 and Figure 5 , the second jacking mechanism 6 comprises a second jacking cylinder 61 and a second roller group 62, the second jacking cylinder 61 drives the second roller group 62 to move back and forth in the vertical direction through the lifting port 21, and the upper side of the detection workbench 2 is further provided with a third roller group 22. The carrying mechanism 5 comprises a carrying cylinder 51, a guide rail 52 and a pushing cross plate 53, the carrying cylinder 51 drives the pushing cross plate 53 to slide on the guide rail 52, the lower end of the pushing cross plate is provided with a push-pull assembly 54, and the end of the second roller group 62 is provided with a stop block 621. When the product to be detected is carried, the second jacking cylinder 61 drives the second roller group 62 to move vertically upward until the first roller group 43 after lifting and the second roller group 62 are all connected with the third roller group 22, and the first roller group 43, the second roller group 62 and the third roller group 22 are all on the same horizontal line; the carrying cylinder 51 drives the pushing cross plate 53 to slide on the guide rail 52 in the direction close to the detection workbench 2, so that the push-pull assembly 54 tightly abuts against the side wall of the product to be detected, and pushes the product to be detected to pass through the third roller group 22 and the second roller group 62 in turn, and is stopped by the stop block 621 at the end of the second roller group 62, at this time the cylinder head is located at the third position, and the second jacking mechanism 6 is used for lifting.

[0038] Further, as shown in Figure 6As shown, the limiting mechanism 3 includes a plurality of X limiting rods 31, Y limiting rods 32 and Z limiting rods 33, and the limiting mechanism 3 also includes a plurality of beating air cylinders 34. The Z limiting rods 33 are preferably more than 3, the 3 Z limiting rods 33 are in contact with the bottom of the cylinder head to support the bottom of the cylinder head; the Y limiting rods 32 are preferably more than 2, and are in contact with the front and rear sidewalls of the cylinder head; the X limiting rods 31 are set to be more than 2, and are matched with the X direction grooves of the cylinder head. The second lifting mechanism 6 drives the second roller set 62 to move vertically downward until the product to be detected falls into the limiting mechanism 3, and the X, Y and Z directions are limited by the X limiting rods 31, Y limiting rods 32 and Z limiting rods 33 respectively, the beating air cylinder 34 clamps and limits the product to be detected after limiting, and the second roller set 62 continues to move downward until it is separated from the product to be detected. At this time, the upper and lower sides of the product to be detected are exposed outside to facilitate omnidirectional visual detection.

[0039] Further, the visual detection mechanism includes a driving assembly, a plurality of industrial cameras 8 and a plurality of endoscopes, the plurality of industrial cameras 8 are distributed in the front, rear, left, right, upper and lower six dimensions of the cylinder head, and respectively take pictures of the six surfaces of the cylinder head, so as to obtain the appearance and size information within the 360° range of the appearance of the cylinder head. The driving assembly drives the plurality of endoscopes to take pictures and collect the inner hole and deep recess part of the product to be detected, the first detection space obtains the image information of the upper half of the cylinder head, and the second detection space obtains the image information of the lower half of the cylinder head. The endoscopes include a top endoscope 81, a bottom endoscope 82 and a side endoscope 83, which are respectively used for taking pictures and collecting the inner hole and deep recess part of the top, bottom and side direction of the cylinder head, and the top endoscope 81, the bottom endoscope 82 and the side endoscope 83 are respectively set to be not less than 2. The driving assembly includes a plurality of endoscopic air cylinders, the output ends of the plurality of endoscopic air cylinders are all fixed with mounting plates, and the endoscopes are bolted on the mounting plates, so as to facilitate replacement and maintenance. When internal visual detection is performed, the top endoscope 81 on the mounting plate driven by the top endoscopic air cylinder moves downward and deeply into the top inner hole and deep recess part of the cylinder head for endoscopic shooting to obtain the size and appearance information of the product inner hole; similarly, the bottom endoscope 82 deeply endoscopically shoots the bottom inner hole and deep recess part of the cylinder head; and the side endoscope 83 deeply endoscopically shoots the side inner hole and deep recess part of the cylinder head. The light supplementing lamp 23 is arranged on the detection workbench 2 to supplement light.

[0040] Further, the detection device further comprises an image analysis mechanism and a sensor, and the products to be detected are attached with two-dimensional codes, and the visual detection mechanism is connected with the image analysis mechanism. The photos collected by the industrial camera 8 and the endoscope are transmitted to the image analysis mechanism for image processing and operation to determine whether the products are qualified or not, such as product deformation, burr, poor thread processing, poor hole size and position, missed processing and wrong processing, etc., and according to the set standard tolerance requirements, whether the defects are within the tolerance range is analyzed. Specifically, the sensor obtains the casting batch number by identifying the product two-dimensional code, and integrates the production environment (such as room temperature, furnace temperature, chemical composition, first piece porosity, drawing test, etc.) of the casting batch number and the detection result of the defect this time, analyzes the potential causes of the defect, and under the support of big data analysis, the casting production parameters can be continuously optimized to avoid the generation of defects from the source.

[0041] Further, the pushing horizontal plate is provided with a driving cylinder and a hook claw 55, after detection, the limiting mechanism 3 releases the cylinder head, and at the same time, the second lifting mechanism 6 drives the second roller set 62 to lift the product to be detected, so that the second roller set 62 is connected with the third roller set 22, the driving cylinder drives the hook claw 55 to vertically move downward to hook the cylinder head, the carrying cylinder 51 drives the pushing horizontal plate 53 to slide on the guide rail 52 away from the detection workbench 2, the hook claw 55 drives the cylinder head to return to the upper side of the first roller set 43, the first lifting cylinder 41 drives the first roller set 43 to vertically move downward through the roller gap, until the cylinder head returns to the conveying line 1 and is separated from the first roller set 43; the stopping cylinder 71 drives the stopping plate 72 to vertically move downward to the lower side of the conveying line 1, and the product is conveyed to the subsequent process by the conveying line 1.

[0042] Specifically, the qualified products flow to the next process, if there is an out-of-tolerance condition, the product is unqualified, the unqualified product flows to the rework process, and the out-of-tolerance items of the product are statistically analyzed according to the defect type, position, size or severity, and are bound together with the product traceable two-dimensional code, the out-of-tolerance items are statistically analyzed, and the visual image is displayed to the operator or quality personnel, so as to improve the detection efficiency.

[0043] Working principle:

[0044] When conveying, the roller type conveying line 1 conveys the product to be detected to the side of the detection workbench 2, the stopping cylinder 71 drives the stopping plate 72 to vertically move upward through the roller gap, until the stopping plate 72 stops the product to be detected in the conveying process, at this time, the first lifting mechanism 4 is located directly below the product to be detected, the first lifting cylinder 41 drives the first roller set 43 to vertically move upward through the roller gap to lift the product to be detected, so that it is separated from the conveying line 1.

[0045] When carrying, the second lifting cylinder 61 drives the second roller group 62 to move vertically upward until the first roller group 43 and the second roller group 62 after lifting are in contact with the third roller group 22, and the first roller group 43, the second roller group 62 and the third roller group 22 are on the same horizontal line. The carrying cylinder 51 drives the pushing plate 53 to slide on the guide rail 52 to the direction close to the detection workbench 2, so that the push-pull assembly 54 is close to the side wall of the product to be detected, and the product to be detected is pushed to pass through the third roller group 22 and the second roller group 62 in turn, and is stopped by the stop block 621 at the end of the second roller group 62. At this time, the product to be detected is lifted by the second lifting mechanism 6. The second lifting mechanism 6 drives the second roller group 62 to move vertically downward until the product to be detected falls into the limiting mechanism 3, and the X limiting rod 31, the Y limiting rod 32 and the Z limiting rod 33 limit the degrees of freedom in X, Y and Z directions respectively. The beating cylinder 34 clamps and limits the product to be detected after limiting, and the second roller group 62 continues to move downward until it is separated from the product to be detected. At this time, the upper and lower sides of the product to be detected are exposed to the outside.

[0046] When detecting, the industrial cameras 8 respectively take photos of the six surfaces of the cylinder block and the cylinder head, so as to obtain the appearance and size information within the 360° range of the appearance of the cylinder block and the cylinder head. The endoscopic cylinders drive the endoscopes to take photos of the inner hole and the deep recessed part of the product to be detected, so as to obtain the size information of the inner hole and the appearance of the product. The photos collected by the industrial cameras 8 and the endoscopes are transmitted to the image analysis mechanism for image processing and operation to judge whether the product is qualified. The sensor obtains the casting batch number by identifying the two-dimensional code of the product, and integrates the production environment of the casting batch number and the detection result of the defect this time to analyze the potential causes of the defect.

[0047] After detection, the limiting mechanism 3 releases the cylinder block and the cylinder head, and the second lifting mechanism 6 drives the second roller group 62 to lift the product to be detected, so that the second roller group 62 is in contact with the third roller group 22. The driving cylinder drives the hook 55 to move vertically downward to hook the cylinder block and the cylinder head. The carrying cylinder 51 drives the pushing plate 53 to slide on the guide rail 52 to the direction away from the detection workbench 2. The hook 55 drives the cylinder block and the cylinder head to the upper side of the first roller group 43. The first lifting cylinder 41 drives the first roller group 43 to move vertically downward through the roller gap until the cylinder block and the cylinder head are separated from the first roller group 43 and returned to the conveying line 1. The stop cylinder 71 drives the stop plate 72 to move vertically downward to the lower side of the conveying line 1, and the conveying line 1 conveys the cylinder block and the cylinder head to the subsequent process.

[0048] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims with respect to the figures of the patent document.

Claims

1. An engine block head visual inspection apparatus, characterized by: The detection device comprises a conveying line (1) and a detection workbench (2) arranged beside the conveying line (1), the conveying line (1) is a roller type and is provided with roller gaps, the detection workbench (2) is provided with a lifting opening (21), and a limiting mechanism (3) is arranged around the lifting opening (21) of the detection workbench (2), and the limiting mechanism (3) is used for limiting a product to be detected. The detection device further comprises a first lifting mechanism (4), the first lifting mechanism (4) is used for lifting the product to be detected through the roller gaps, and the product to be detected is lifted from a first position to a second position. The detection device further comprises a carrying mechanism (5) and a second lifting mechanism (6), the carrying mechanism (5) is used for carrying the product to be detected located at the second position to a third position, the second lifting mechanism (6) is used for transferring the product to be detected located at the third position to the limiting mechanism (3) through the lifting opening (21) to limit the product to be detected, so that the upper half of the product to be detected is exposed to a first detection space, and the lower half of the product to be detected is exposed to a second detection space, and the detection device further comprises a visual detection mechanism, and the visual detection mechanism is used for acquiring image information of the first detection space and the second detection space.

2. The engine block head visual inspection apparatus of claim 1, wherein: The first lifting mechanism (4) comprises a first lifting cylinder (41), the output end of the first lifting cylinder (41) is fixed with a lifting supporting plate (42), a plurality of first roller groups (43) are arranged on the lifting supporting plate (42), and the plurality of first roller groups (43) are matched with adjacent roller gaps.

3. The engine block head visual inspection apparatus of claim 2, wherein: A stopping mechanism (7) is arranged beside the first lifting mechanism (4), the stopping mechanism (7) comprises a stopping cylinder (71) and a stopping plate (72), and the stopping cylinder (71) drives the stopping plate (72) to move back and forth in the vertical direction through the roller gaps.

4. The engine block head visual inspection apparatus of claim 3, wherein: The second lifting mechanism (6) comprises a second lifting cylinder (61) and a second roller group (62), the second lifting cylinder (61) drives the second roller group (62) to move back and forth in the vertical direction through the lifting opening (21), and the upper side of the detection workbench (2) is further provided with a third roller group (22), the first roller group (43) after being lifted and the second roller group (62) are all connected with the third roller group (22) and are located on the same horizontal line.

5. The engine block head visual inspection apparatus of claim 4, wherein: The carrying mechanism (5) comprises a carrying cylinder (51), a guide rail (52) and a pushing cross plate (53), the carrying cylinder (51) drives the pushing cross plate (53) to slide on the guide rail (52), the lower end of the pushing cross plate is provided with a push-pull assembly (54), the carrying cylinder (51) drives the product to be detected to pass through the third roller group (22) and the second roller group (62) in sequence, and the tail end of the second roller group (62) is provided with a stop block (621).

6. The engine block head visual inspection apparatus of claim 5, wherein: The pushing cross plate is provided with a driving cylinder and a hook (55), after detection, the driving cylinder drives the hook (55) to move vertically downward to hook the cylinder cover, and at the same time, the carrying cylinder (51) drives the cross plate to move away from the detection workbench (2).

7. The engine block head visual inspection apparatus of claim 1, wherein: The limiting mechanism (3) comprises X limiting rods (31), Y limiting rods (32) and Z limiting rods (33) for limiting the freedom degrees of the product to be detected in X, Y and Z directions respectively, and further comprises a plurality of beating air cylinders (34) for clamping and limiting the product to be detected after being limited.

8. The engine block head visual inspection apparatus of any one of claims 1-6, wherein: The visual detection mechanism comprises a driving assembly, a plurality of industrial cameras (8) and a plurality of endoscopes, the plurality of industrial cameras (8) and the plurality of endoscopes are distributed on the upper and lower sides of the detection workbench (2), the plurality of industrial cameras (8) acquire appearance image information of the product to be detected, and the driving assembly drives the plurality of endoscopes to take photos and collect the inner hole and deep recessed parts of the product to be detected.

9. The engine block head visual inspection apparatus of claim 8, wherein: The detection device further comprises an image analysis mechanism and a sensor, the product to be detected is attached with a two-dimensional code, the sensor is used for identifying the two-dimensional code, and the visual detection mechanism is connected with the image analysis mechanism.

10. An engine cylinder head visual detection method applied to the engine cylinder head visual detection device in any one of claims 1 to 9, characterized in that: S1. The drum conveying line (1) conveys the product to be detected to the side of the detection workbench (2), the stopping air cylinder (71) drives the stopping plate (72) to move vertically upward through the drum gap until the stopping plate (72) stops the product to be detected in conveying, and the first lifting air cylinder (41) drives the first roller set (43) to move vertically upward through the drum gap to lift the product to be detected and separate it from the conveying line (1); S2. The second lifting air cylinder (61) drives the second roller set (62) to move vertically upward until the first roller set (43) and the second roller set (62) after being lifted are connected with the third roller set (22), the carrying air cylinder (51) drives the pushing plate (53) to slide on the guide rail (52) towards the detection workbench (2), and the push-pull assembly pushes the product to be detected to slide onto the second roller set (62) and is stopped by the stop block (621) at the end of the second roller set (62); S3. The second lifting mechanism (6) drives the second roller set (62) to move vertically downward until the product to be detected falls into the limiting mechanism (3) for limiting; S4. The plurality of industrial cameras (8) acquire appearance image information of the product to be detected, the driving assembly drives the plurality of endoscopes to take photos and collect the inner hole and deep recessed parts of the product to be detected, the sensor identifies the two-dimensional code to acquire the processing technology information of the product to be detected, and the image analysis mechanism processes the acquired image information to determine whether it is qualified; S5. After detection, the limiting mechanism (3) releases the product to be detected, the second lifting mechanism (6) drives the second roller set (62) to lift the product to be detected, the driving air cylinder drives the hook (55) to move vertically downward to hook the cylinder head, and the carrying mechanism (5) carries the product back to the conveying line (1) in the opposite path to the next process.

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