A nondestructive testing device and method for automobile die casting surface

Abstract

The present invention provides a device and method for nondestructive testing of the surface of automobile die castings, and relates to a testing device, comprising a testing conveyor frame, a belt conveyor mechanism, a mounting base block, a mounting column and a testing substrate. The belt conveyor mechanism is used to transport the automobile die castings to a testing position below the testing substrate. A group of testing frames bent at right angles are installed on the testing substrate for transfer at one side of a horizontal rod extending therefrom. A group of driving shafts connected to one end of the testing frames are installed at the center transfer of the testing substrate. The driving shafts are connected to a driving motor installed on the testing substrate through gears. A group of cameras 1 for taking photos and testing at a lower testing position are also installed on one side of the horizontal rod extending therefrom. A group of cameras 2 are installed on one side of the vertical rod extending therefrom. A group of cameras 3 are also connected to the center of the driving shaft through a cylinder. The present invention can simultaneously or selectively independently complete nondestructive testing of the surface of die castings with large thickness, large size and central column holes.

Description

Technical Field

[0001] The invention relates to a detection device, in particular to a nondestructive detection device and method for the surface of automobile die castings. Background Art

[0002] Automotive die-castings are various automotive parts manufactured through the die-casting process. These parts are usually made of aluminum alloy, magnesium alloy and other materials. Due to their light weight and high strength, they are widely used in automobile manufacturing. Their specific application types mainly include engine blocks, motor end covers, pump housings, wheel hubs, etc.

[0003] In order to ensure the molding quality of die-cast parts, it is inevitable to perform non-destructive surface inspection on the molded die-cast parts during production. The specific inspection method is generally visual camera photography inspection. The inspection equipment can be as shown in the patented automotive die-casting visual inspection and conveying device (Announcement No.: CN219428961U). However, when the structural area of ​​the die-casting is large, or the molding details are more and more complex, it is difficult to meet the inspection requirements by using a single fixed camera photography inspection method as in the above patent. In addition, when the inspection is carried out during transportation, the pause time in the middle will be prolonged, thereby affecting the inspection efficiency. At the same time, if a component with a central cylindrical hole is inspected, it is difficult to detect the surface quality of the circumferential outer wall and the middle cylindrical hole by a single top photography. Therefore, secondary inspection or manual inspection is required, which is time-consuming and labor-intensive. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for nondestructive testing of the surface of automotive die castings, which can simultaneously or selectively independently complete the nondestructive testing of the surface of die castings with large thickness, large size and central column holes, that is, the circumferential outer wall surface detection of large-thickness workpieces, the photographic detection of the upper surface of large-area workpieces and the inner wall surface detection of workpieces with central column holes can be completed simultaneously or selectively independently, and the device has a higher degree of integration, which can greatly save the floor space occupied by the conveying equipment during detection. At the same time, reasonable distribution and transition methods can also improve the efficiency of detection, and the overall equipment movement mode is also relatively simple, generally linear reciprocating motion, and the movement mode is relatively single, so compared with complex robot operations, the production cost and maintenance cost are lower.

[0005] The present invention provides the following technical solutions:

[0006] A nondestructive testing device and method for the surface of automobile die-castings, including a testing part, the testing part includes a testing conveyor frame, a belt conveying mechanism mounted on the testing conveyor frame, mounting blocks arranged on both sides of the testing conveyor frame, mounting columns mounted on the mounting blocks, and a circular testing substrate mounted on the belt conveyor mechanism by the mounting columns. The belt conveyor mechanism adopts an existing belt conveyor driven by a transmission roller, which is a prior art and is not described in detail here. It is used to convey automobile die-castings to a testing position below the testing substrate. A sensor for detecting the position of the workpiece is arranged on the mounting block. A group of testing frames bent at right angles are installed on the testing substrate for transfer at one side of the horizontal rod extension. The center transfer of the testing substrate is installed with a group of drive shafts connected to one end of the testing frame. The drive shaft is connected to the detection substrate through a gear. The driving motor is connected to the detection frame to drive the detection frame to rotate around the center of the detection substrate. The detection frame is also equipped with a group of cameras 1 facing the detection position for photo detection on one side of the horizontal rod. The camera 1 is used to realize comprehensive photo detection of the upper surface of a large-area workpiece when rotating with the detection frame. The detection frame is equipped with a group of cameras 2 on one side of the vertical rod. The camera 2 is used to take photos and detect the circumferential outer wall surface of the thick workpiece when rotating with the detection frame. The center of the driving shaft is also connected to a group of cameras 3 through a cylinder drive. After the camera 3 is driven by the cylinder to drop into place, it is used to take photos and detect the inner wall surface of the workpiece with a central column hole when rotating with the detection frame. For a workpiece without a central column hole, the cylinder can drive the camera 3 to rise to avoid the influence on the upper surface of the workpiece during rotation.

[0007] In this way, after the sensor detects that the belt conveyor mechanism has delivered the workpiece to the position, the device can start the cylinder and the drive motor in succession, and can simultaneously complete the non-destructive inspection of the surface of the die-casting with large thickness, large size and central column hole. If the workpiece to be inspected is a die-casting without a central column hole, the cylinder will not be started, and only the camera one and the camera two will be positioned at the appropriate position. When rotating with the inspection frame, the inspection of the circumferential outer wall surface of the workpiece with large thickness and the photographic inspection of the upper surface of the workpiece with large area can be realized, and the device has a higher degree of integration.

[0008] Preferably, the detection frame is further provided with a set of screw rods 1 on one side of the horizontal rod extension, the camera 1 is slidably mounted on the detection frame through a nut slider 1, and is threadedly connected to the screw rod 1, the screw rod 1 is driven by a motor 1 to adjust the distance between the camera 1 and the center of the detection frame, and the detection frame is further provided with a set of screw rods 2 on one side of the vertical rod extension, the camera 2 is slidably mounted on the detection frame through a nut slider 2, and is threadedly connected to the screw rod 2, the screw rod 2 is driven by a motor 2 to adjust the vertical height of the camera 2;

[0009] At this point, the position adjustment of camera one and camera two can be achieved when inspecting workpieces of different thicknesses and different area sizes, making the inspection adaptability more flexible and better.

[0010] Preferably, one end of the detection frame is also connected to a group of balancing blocks, which extend toward one end of the horizontal rod of the detection frame away from the detection frame, and are installed in a transfer manner with the detection substrate. Therefore, when the driving shaft drives the detection frame to rotate, the rotation stability can be better due to the balance of the balancing blocks.

[0011] Preferably, it also includes a transition conveying part, the transition conveying part includes a transition conveying frame, a three-layer belt conveying mechanism located on the transition conveying frame, and a lifting frame located on one side of the transition conveying frame, the three-layer belt conveying mechanism includes an upper belt conveyor, a middle belt conveyor and a lower belt conveyor distributed in sequence from top to bottom, two groups of detection parts are installed on the lifting frame, the two groups of detection parts are lifted and lowered under the drive of their respective driving parts, and are respectively located at the upper layer detection part one and the lower layer detection part two, the detection part one reciprocates between the upper layer belt conveyor and the middle layer belt conveyor to receive the workpiece conveyed by the middle layer belt conveyor and convey it to the upper layer belt conveyor for output after passing the detection, the detection part one reciprocates between the middle layer belt conveyor and the lower layer belt conveyor to receive the workpiece conveyed by the middle layer belt conveyor and convey it to the lower layer belt conveyor for output after passing the detection;

[0012] At this point, the workpieces transported by the middle belt conveyor can be continuously transported, and the detection section divides the transportation and detection into two independently operating parts. The two groups of detection sections alternately receive the workpieces transported by the middle belt conveyor to improve the transportation and detection efficiency. At the same time, the input and output are also arranged in a three-dimensional layered manner, which can further improve the integration of the equipment and greatly save the floor space of the conveying equipment during detection. When realizing the transition between movement and detection, the overall movement mode and structure of the equipment are relatively simple, that is, it is generally a linear reciprocating motion, and the movement mode is relatively simple. Therefore, compared with complex robot operations, the production cost and maintenance cost are lower.

[0013] Preferably, a group of NG material tables are also provided on one side of the lifting frame, and the NG material tables are lifted and lowered under the drive of the second driving unit, and a group of NG material transition conveyors are also arranged thereon, and the NG material transition conveyors are lifted and lowered by the second driving unit to dock with the two groups of inspection units for receiving unqualified workpieces after inspection.

[0014] Preferably, two groups of transition conveying parts are symmetrically distributed on both sides of each group of NG material tables. At this point, the lifting of one group of NG material tables can realize the waste material recovery for the four groups of detection parts. This distribution method can also further improve the integration of the overall equipment. Since unqualified products are generally less than qualified products, the utilization rate of the NG material tables can also be improved. The integration is higher and the space occupation area can be further reduced. A group of NG material recovery conveyors are also arranged on the bottom layer of a group of transition conveying parts. When the NG material recovery conveyor is docked with the NG material transition conveyor, it is used to undertake the recovery of unqualified waste workpieces.

[0015] Preferably, the transition conveying parts symmetrically distributed on both sides of the NG material table form a group of detection units. The two groups of detection parts in each group of detection units can realize the detection of the same or different types of workpieces, and the detection units have at least two groups, which are arranged side by side. Under this distribution method, the equipment can be better integrated and the overall space utilization of the factory building can be higher.

[0016] Preferably, the driving part 1 comprises two groups of upper threaded screws and two groups of lower threaded screws, the upper sections of the upper threaded screws and the lower sections of the lower threaded screws are threaded sections respectively connected to the first detection part and the second detection part, while the lower sections of the upper threaded screws and the upper sections of the lower threaded screws are optical axis sections respectively connected to the first detection part and the second detection part, and the lifting frame is also equipped with a rotating motor for driving the upper threaded screw and the lower threaded screw to rotate respectively;

[0017] Thus, the two sets of detection parts can be lifted and lowered separately only by assembling an upper threaded screw and two sets of lower threaded screws, and the guiding and stability can be improved. The structure is relatively simple and the operation is relatively convenient.

[0018] The second driving part includes four groups of vertical screw rods distributed in a rectangular shape and threadedly connected to the NG material table. At this point, the NG material table can be lifted and lowered through the synchronous rotation of the four groups of vertical screw rods. The structure is relatively simple and the operation is also relatively convenient.

[0019] A method for nondestructive testing of the surface of automobile die castings, based on the above-mentioned nondestructive testing device for the surface of automobile die castings, comprises the following steps:

[0020] The workpieces to be inspected are placed on the middle-layer belt conveyor in sequence. The middle-layer belt conveyor drives the workpieces to move toward the inspection conveyor frame. The inspection unit 1 moves to dock with the middle-layer belt conveyor under the drive of the driving unit 1. The belt transmission mechanism on it is synchronized with the middle-layer belt conveyor and runs in the same direction to synchronously receive the workpieces transported by the middle-layer belt conveyor. When the sensor detects that the workpiece moves to the inspection position, it pauses. Then the driving unit 1 is started to drive the inspection unit 1 to rise to dock with the upper-layer belt conveyor. At the same time, the inspection unit 2 rises to dock with the middle-layer belt conveyor to take over the inspection unit 1 operation. During the rising process of the inspection unit 1, the inspection of the workpiece is completed.

[0021] When the workpiece inspected by the first detection unit is qualified, the belt transmission mechanism on it is started again, and runs synchronously and in the same direction as the upper belt conveyor to transfer the workpiece to the upper belt conveyor for output, and then drives the first detection unit again, so that the first detection unit descends to return to dock with the middle belt conveyor for a new round of workpiece inspection cycle, and at the same time, the second detection unit descends to dock with the lower belt conveyor, and performs the same inspection operation as the first detection unit during the descent;

[0022] If the workpiece inspected by the first detection unit is unqualified, the belt transmission mechanism on it will not be started, and after the second detection unit completes the acceptance of the workpiece, the driving unit one will be started again. When the second detection unit is descending, the first detection unit also descends to dock with the middle-level belt conveyor, and the second detection unit descends to dock with the lower-level belt conveyor. During the descent process, the second detection unit also completes the same detection operation as the first detection unit. After the first detection unit is descended to dock with the middle-level belt conveyor, the NG material transition conveyor on the NG material table also completes the movement to dock with the belt conveyor of the first detection unit under the drive of the second driving unit. Subsequently, the belt transmission mechanism on the first detection unit and the NG material transition conveyor are connected to the middle-level belt conveyor. The conveyors run synchronously and in the same direction. At this time, the belt transmission mechanism on the detection part one synchronously outputs unqualified workpieces to the NG material transition conveyor, and also synchronously receives the workpieces input by the middle belt conveyor. After receiving the workpieces in place, the workpiece detection operation is cyclically performed again until the two sets of detection parts alternately complete the detection of all workpieces transported on the middle belt conveyor. After receiving the unqualified waste workpieces, the NG material transition conveyor is driven by the driving part two to descend to dock with the NG material recovery conveyor. After the NG material transition conveyor and the NG material recovery conveyor are started, they move synchronously and in the same direction, so that the workpieces on the NG material transition conveyor move to the NG material recovery conveyor.

[0023] The beneficial effects of the present invention are:

[0024] 1. This device can start the cylinder and the drive motor successively after the sensor detects that the belt conveyor mechanism has delivered the workpiece to the position, so that the non-destructive detection of the surface of the die-casting with large thickness, large size and central column hole can be completed at the same time. If the workpiece to be inspected is a die-casting without a central column hole, the cylinder will not be started, and only the camera 1 and the camera 2 will be positioned at the appropriate position. When rotating with the inspection frame, the circumferential outer wall surface of the thick workpiece and the photo inspection of the upper surface of the large-area workpiece can be realized, and the device has a higher degree of integration;

[0025] 2. After adding the transition conveying section, the workpieces transported by the middle belt conveyor can be continuously transported, and the detection section divides the conveying and detection into two independently operated parts. The two groups of detection sections alternately receive the workpieces transported by the middle belt conveyor to improve the efficiency of conveying and detection. At the same time, the input and output are also arranged in a three-dimensional layered manner, which can further improve the integration of the equipment and greatly save the floor space of the conveying equipment during detection. When realizing the transition between movement and detection, the overall movement mode and structure of the equipment are relatively simple, that is, it is generally a linear reciprocating motion, and the movement mode is relatively simple. Therefore, compared with complex robot operations, the production cost and maintenance cost are lower. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 is a schematic top view of the detection portion of the present invention;

[0028] Figure 2 is a side cross-sectional schematic diagram of the detection portion of the present invention;

[0029] Figure 3 It is a structural schematic diagram showing the position of the detection part in the transition conveying part after the transition conveying part is added in the present invention (the detection part only shows the structure of the detection conveying frame);

[0030] Figure 4 yes Figure 3 Schematic diagram of top view;

[0031] Figure 5 It is a schematic top view showing two groups of detection units arranged side by side;

[0032] Figure 6 It is a schematic diagram of the threaded connection between the mounting base block and the upper threaded screw in the detection part;

[0033] Markings in the figure:

[0034] 1. Detection unit; 2. Transition conveyor unit; 3. Detection unit 1; 4. Detection unit 2; 5. Threaded section; 6. Optical axis section; 11. Detection conveyor frame; 12. Belt conveyor mechanism; 13. Mounting base block; 14. Mounting column; 15. Detection substrate; 16. Sensor; 17. Balance block; 21. Transition conveyor frame; 22. Upper belt conveyor; 23. Middle belt conveyor; 24. Lower belt conveyor; 25. Lifting frame; 2 6. NG material table; 27. NG material transition conveyor; 28. Drive unit one; 29. ​​Drive unit two; 20. NG material recovery conveyor; 281. Upper threaded screw; 282. Lower threaded screw; 291. Vertical screw; 151. Detection frame; 152. Drive shaft; 153. Gear; 154. Camera one; 155. Camera two; 156. Camera three; 157. Cylinder; 158. Screw one; 159. Screw two. DETAILED DESCRIPTION

[0035] Example 1

[0036] like Figure 1-2As shown, a nondestructive testing device for the surface of automobile die castings, in this embodiment, includes a testing part 1, the testing part 1 includes a testing conveyor frame 11, a belt conveyor mechanism 12 mounted on the testing conveyor frame 11, a mounting base block 13 arranged on both sides of the testing conveyor frame 11, a mounting column 14 mounted on the mounting base block 13, and a circular testing substrate 15 mounted on the belt conveyor mechanism 12 by the mounting column 14. The belt conveyor mechanism 12 adopts an existing belt conveyor driven by a transmission roller, which is a prior art and is not described here. It is used to convey automobile die castings to the testing position below the testing substrate 15. A sensor 16 for detecting the position of the workpiece is arranged on the mounting base block 13. A group of right-angled testing frames 151 are installed on the side of the horizontal rod extending for transfer on the testing substrate 15. The center transfer of the testing substrate 15 is installed with a group of drive shafts 152 connected to one end of the testing frame 151. The drive shaft 152 is connected to the detection substrate 1 through a gear 153. 5 is connected to the driving motor on the detection frame 151 to drive the detection frame 151 to rotate around the center of the detection substrate 15. The detection frame 151 is also equipped with a group of cameras 154 facing the detection position for photo detection on one side of the horizontal rod. The camera 154 is used to realize comprehensive photo detection of the upper surface of a large-area workpiece when rotating with the detection frame 151. The detection frame 151 is equipped with a group of cameras 155 on one side of the vertical rod. The camera 155 is used to take photos and detect the circumferential outer wall surface of the thick workpiece when rotating with the detection frame 151. The center of the driving shaft 152 is also connected to a group of cameras 156 driven by the cylinder 157. After the camera 156 is driven by the cylinder 157 to drop into place, it is used to take photos and detect the inner wall surface of the workpiece with a central column hole when rotating with the detection frame 151. For the workpiece without a central column hole, the cylinder 157 can drive the camera 156 to rise to avoid the influence on the upper surface of the workpiece during rotation.

[0037] In this way, after the sensor 16 detects that the belt conveyor mechanism 12 has delivered the workpiece to the position, the device can start the cylinder 157 and the drive motor in succession, and can simultaneously complete the surface non-destructive testing of the die-castings with large thickness, large size and central column holes. If the workpiece to be inspected is a die-casting without a central column hole, the cylinder 157 will not be started, and only the camera 154 and the camera 2 155 will be positioned at the appropriate position. When rotating with the inspection frame 151, the circumferential outer wall surface of the workpiece with large thickness and the photographic inspection of the upper surface of the workpiece with large area can be realized, and the device has a higher degree of integration.

[0038] The detection frame 151 is also provided with a set of screw rods 158 on one side of the horizontal rod extension. The camera 154 is slidably mounted on the detection frame 151 through a nut slider 1 and is threadedly connected to the screw rod 158. The screw rod 158 is driven by a motor 1 to adjust the distance between the camera 154 and the center of the detection frame 151. The detection frame 151 is also provided with a set of screw rods 159 on one side of the vertical rod extension. The camera 155 is slidably mounted on the detection frame 151 through a nut slider 2 and is threadedly connected to the screw rod 159. The screw rod 159 is driven by a motor 2 to adjust the vertical height of the camera 155.

[0039] At this point, the position adjustment of camera 1 154 and camera 2 155 can be achieved when inspecting workpieces of different thicknesses and different area sizes, making the inspection adaptability more flexible and better.

[0040] One end of the detection frame 151 is also connected to a group of balancing blocks 17, which extend toward one end of the horizontal rod of the detection frame 151 and are connected to the detection substrate 15 by an adapter installation. Therefore, when the driving shaft 152 drives the detection frame 151 to rotate, the rotation stability can be better due to the balance of the balancing block 17.

[0041] Example 2

[0042] like Figure 3-6 As shown, a nondestructive testing device for the surface of automobile die castings, in this embodiment, also includes a transition conveying part 2, the transition conveying part 2 includes a transition conveying frame 21, a three-layer belt conveying mechanism located on the transition conveying frame 21, and a lifting frame 25 located on one side of the transition conveying frame 21, the three-layer belt conveying mechanism includes an upper belt conveyor 22, a middle belt conveyor 23 and a lower belt conveyor 24 distributed in sequence from top to bottom, and two groups of detection parts 1 are installed on the lifting frame 25, and the two groups of detection parts 1 are connected to the respective drive parts 28. Drive down and lift, and respectively include the detection part 1 3 located at the upper layer and the detection part 2 4 located at the lower layer, the detection part 1 3 reciprocates between the upper belt conveyor 22 and the middle belt conveyor 23 to receive the workpiece conveyed by the middle belt conveyor 23 and transport it to the upper belt conveyor 22 for output after passing the inspection, the detection part 1 3 reciprocates between the middle belt conveyor 23 and the lower belt conveyor 24 to receive the workpiece conveyed by the middle belt conveyor 23 and transport it to the lower belt conveyor 24 for output after passing the inspection;

[0043] At this point, the workpieces transported by the middle belt conveyor 23 can be continuously transported, and the detection part 1 divides the transportation and detection into two independently operating parts. The two groups of detection parts 1 alternately receive the workpieces transported by the middle belt conveyor 23 to improve the transportation and detection efficiency. At the same time, the input and output are also arranged in a three-dimensional layered manner, which can further improve the integration of the equipment and greatly save the floor space of the conveying equipment during detection. When realizing the transition between movement and detection, the overall movement mode and structure of the equipment are relatively simple, that is, it is generally a linear reciprocating motion, and the movement mode is relatively simple. Therefore, compared with complex robot operations, the production cost and maintenance cost are lower.

[0044] A group of NG material tables 26 are also provided on one side of the lifting frame 25. The NG material tables 26 are lifted and lowered by the driving unit 29. A group of NG material transition conveyors 27 are also arranged thereon. The NG material transition conveyors 27 are lifted and lowered by the driving unit 29 to dock with the two groups of inspection units 1 for receiving unqualified workpieces after inspection.

[0045] Two groups of transition conveying parts 2 are symmetrically distributed on both sides of each group of NG material tables 26. At this point, the lifting of one group of NG material tables 26 can realize the waste recovery for the four groups of detection parts 1. This distribution method can also further improve the integration of the overall equipment. Since unqualified products are generally less than qualified products, the utilization rate of the NG material tables 26 can also be improved, with higher integration, and the space occupied can be further reduced. In addition, a group of NG material recovery conveyors 20 are arranged on the bottom layer of a group of transition conveying parts 2. When the NG material recovery conveyor 20 is docked with the NG material transition conveyor 27, it is used to undertake the recovery of unqualified waste workpieces.

[0046] The transition conveying parts 2 symmetrically distributed on both sides of the NG material table 26 form a group of detection units. The two groups of detection parts 1 in each group of detection units can realize the detection of the same or different types of workpieces, and the detection units have at least two groups, which are arranged side by side. Under this distribution method, the equipment integration can be better ensured and the space utilization rate of the overall factory building can be higher.

[0047] The driving part 1 28 includes two groups of upper threaded screws 281 and two groups of lower threaded screws 282. The upper sections of the upper threaded screws 281 and the lower sections of the lower threaded screws 282 are threaded sections 5 respectively connected to the first detection part 3 and the second detection part 4, while the lower sections of the upper threaded screws 281 and the upper sections of the lower threaded screws 282 are optical axis sections 6 respectively connected to the first detection part 3 and the second detection part 4. The lifting frame 25 is also equipped with a rotating motor for driving the upper threaded screws 281 and the lower threaded screws 282 to rotate.

[0048] Thus, the two sets of detection parts 1 can be lifted and lowered only by the upper threaded screw 281 and the two sets of lower threaded screws 282, and the guiding property and stability can be improved. The structure is relatively simple and the operation is relatively convenient.

[0049] The driving part 29 includes four groups of vertical screw rods 291 distributed in a rectangular shape and threadedly connected to the NG material table 26. At this point, the NG material table 26 can be lifted and lowered by the synchronous rotation of the four groups of vertical screw rods 291. The structure is relatively simple and the operation is also relatively convenient.

[0050] A method for nondestructive testing of the surface of automobile die castings, based on the above-mentioned nondestructive testing device for the surface of automobile die castings, comprises the following steps:

[0051] The workpieces to be inspected are sequentially placed on the middle-layer belt conveyor 23, and the middle-layer belt conveyor 23 drives the workpieces to move toward the inspection conveyor frame 11. The inspection unit 13 moves to dock with the middle-layer belt conveyor 23 under the drive of the driving unit 1 28, and the belt transmission mechanism 12 thereon is synchronized with the middle-layer belt conveyor 23 and runs in the same direction to synchronously receive the workpieces transported by the middle-layer belt conveyor 23, and pauses when the sensor 16 detects that the workpiece moves to the inspection position, and then the driving unit 1 28 is started to drive the inspection unit 1 3 to rise to dock with the upper-layer belt conveyor 22, and at the same time, the inspection unit 2 4 rises to dock with the middle-layer belt conveyor 23 to take over the inspection unit 1 3 operation. During the rising process of the inspection unit 1 3, the inspection of the workpiece is completed;

[0052] When the workpiece inspected by the first detection part 3 is qualified, the belt conveying mechanism 12 thereon is started again, and runs synchronously and in the same direction as the upper belt conveyor 22 to transfer the workpiece to the upper belt conveyor 22 for output, and then the first detection part 28 is driven again to make the first detection part 3 descend to return to dock with the middle belt conveyor 23 for a new round of workpiece inspection cycle, and at the same time, the second detection part 4 descends to dock with the lower belt conveyor 24, and performs the same inspection operation as the first detection part 3 during the descent;

[0053] If the workpiece detected by the detection part 3 is unqualified, the belt conveyor mechanism 12 thereon will not be started, and after the detection part 2 4 completes the acceptance of the workpiece, the driving part 1 28 is started again. When the detection part 2 4 is descending, the detection part 1 3 also descends to dock with the middle-layer belt conveyor 23, and the detection part 2 4 descends to dock with the lower-layer belt conveyor 24. The detection part 2 4 also completes the same detection operation as the detection part 1 3 during the descending process. After the detection part 1 3 is descended to dock with the middle-layer belt conveyor 23, the NG material transition conveyor 27 on the NG material table 26 also completes the movement to dock with the belt conveyor of the detection part 3 under the drive of the driving part 2 29. Subsequently, the belt conveyor mechanism 12 on the detection part 3 and the NG material transition conveyor 27 on the middle-layer belt conveyor The belt conveyor 23 runs synchronously and in the same direction. At this time, the belt transmission mechanism 12 on the detection part 3 synchronously outputs unqualified workpieces to the NG material transition conveyor 27, and also synchronously receives the workpieces input by the middle belt conveyor 23. After receiving the workpieces in place, the workpiece detection operation is cyclically performed again until the two groups of detection parts 1 alternately complete the detection of all workpieces transported on the middle belt conveyor 23. After receiving the unqualified waste workpieces, the NG material transition conveyor 27 is driven by the driving part 29 to descend to dock with the NG material recovery conveyor 20. After the NG material transition conveyor 27 and the NG material recovery conveyor 20 are started, they move synchronously and in the same direction, so that the workpieces on the NG material transition conveyor 27 move to the NG material recovery conveyor 20.

[0054] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A non-destructive testing device for the surface of automobile die castings, characterized in that: The invention comprises a detection part (1), wherein the detection part (1) comprises a detection conveyor frame (11), a belt conveying mechanism (12) mounted on the detection conveyor frame (11), a mounting base block (13) arranged on both sides of the detection conveyor frame (11), a mounting column (14) mounted on the mounting base block (13), and a circular detection substrate (15) mounted on the top of the belt conveyor frame (12) by the mounting column (14), wherein the belt conveyor frame (12) is used to convey the automobile die-casting part to the detection position below the detection substrate (15), and a sensor (16) for detecting whether the workpiece is in place is arranged on the mounting base block (13), and a group of detection frames (151) bent at right angles are installed on the detection substrate (15) for transfer at one side of the horizontal rod extending therefrom, and a group of drive shafts (152) connected to one end of the detection frame (151) are installed at the center transfer of the detection substrate (15), and the drive shafts (152) are connected to the detection base block (151) through gears (153). The drive motor on the plate (15) is connected in a transmission manner to drive the detection frame (151) to rotate around the center of the detection substrate (15); the detection frame (151) is also equipped with a group of cameras (154) on one side of the horizontal rod extending therefrom for taking photos and detecting toward the detection position below; the cameras (154) are used to realize comprehensive photo detection of the upper surface of a large-area workpiece when rotating with the detection frame (151); the detection frame (151) is equipped with a group of cameras (155) on one side of the vertical rod extending therefrom; the cameras (155) are used to perform photo detection on the circumferential outer wall surface of a thick workpiece when rotating with the detection frame (151); the center of the drive shaft (152) is also connected to a group of cameras (156) driven by a cylinder (157); the cameras (156) are driven by the cylinder (157) to descend to a position and are used to perform photo detection on the inner wall surface of a workpiece having a central column hole when rotating with the detection frame (151); The detection frame (151) is also provided with a set of screw rods 1 (158) on one side of the horizontal rod extension. The camera 1 (154) is slidably mounted on the detection frame (151) through a nut slider 1 and is threadedly connected to the screw rod 1 (158). The screw rod 1 (158) is driven by a motor 1 to adjust the distance between the camera 1 (154) and the center of the detection frame (151). The detection frame (151) is also provided with a set of screw rods 2 (159) on one side of the vertical rod extension. The camera 2 (155) is slidably mounted on the detection frame (151) through a nut slider 2 and is threadedly connected to the screw rod 2 (159). The screw rod 2 (159) is driven by a motor 2 to adjust the vertical height of the camera 2 (155). The invention also comprises a transition conveying section (2), wherein the transition conveying section (2) comprises a transition conveying frame (21), a three-layer belt conveying mechanism located on the transition conveying frame (21), and a lifting frame (25) located on one side of the transition conveying frame (21), wherein the three-layer belt conveying mechanism comprises an upper belt conveyor (22), a middle belt conveyor (23), and a lower belt conveyor (24) which are sequentially arranged from top to bottom, and wherein two groups of detection sections (1) are installed on the lifting frame (25), and the two groups of detection sections (1) are lifted and lowered under the drive of their respective driving sections (28), and are respectively located at The upper layer has a detection part (3) and a lower layer has a detection part (4), wherein the detection part (3) reciprocates between the upper layer belt conveyor (22) and the middle layer belt conveyor (23) to receive the workpiece conveyed by the middle layer belt conveyor (23) and convey it to the upper layer belt conveyor (22) for output after passing the detection, and the detection part (3) reciprocates between the middle layer belt conveyor (23) and the lower layer belt conveyor (24) to receive the workpiece conveyed by the middle layer belt conveyor (23) and convey it to the lower layer belt conveyor (24) for output after passing the detection.

2. The nondestructive testing device for automobile die casting surface according to claim 1, characterized in that: One end of the detection frame (151) is also connected to a group of balancing blocks (17), the balancing blocks (17) extending towards one end of the horizontal rod away from the detection frame (151), and being installed in a transfer manner with the detection substrate (15).

3. The nondestructive testing device for automobile die casting surface according to claim 1, characterized in that: A group of NG material tables (26) are also provided on one side of the lifting frame (25). The NG material tables (26) are lifted and lowered under the drive of the second driving unit (29). A group of NG material transition conveyors (27) are also arranged on the NG material tables. The NG material transition conveyors (27) are lifted and lowered by the second driving unit (29) to dock with the two groups of inspection units (1) for receiving unqualified workpieces after inspection.

4. The nondestructive testing device for automobile die casting surface according to claim 3, characterized in that: Two groups of transition conveying parts (2) are symmetrically distributed on both sides of each group of NG material tables (26), and a group of NG material recovery conveyors (20) are also arranged on the bottom layer of a group of transition conveying parts (2). When the NG material recovery conveyors (20) are connected to the NG material transition conveyors (27), they are used to receive and recover unqualified waste workpieces.

5. The nondestructive testing device for automobile die casting surface according to claim 4, characterized in that: The transition conveying parts (2) symmetrically distributed on both sides of the NG material table (26) form a group of detection units, and the detection units have at least two groups and are arranged side by side.

6. The nondestructive testing device for automobile die casting surface according to claim 5, characterized in that: The driving part 1 (28) comprises two groups of upper threaded screws (281) and two groups of lower threaded screws (282), the upper section of the upper threaded screw (281) and the lower section of the lower threaded screw (282) are threaded sections (5) respectively connected to the detection part 1 (3) and the detection part 2 (4), while the lower section of the upper threaded screw (281) and the upper section of the lower threaded screw (282) are optical axis sections (6) respectively connected to the detection part 1 (3) and the detection part 2 (4), and the lifting frame (25) is also equipped with a rotating motor for driving the upper threaded screw (281) and the lower threaded screw (282) to rotate respectively; the driving part 2 (29) comprises four groups of vertical screws (291) distributed in a rectangular shape and threadedly connected to the NG material table (26).

7. A method for nondestructive testing of the surface of automobile die castings, based on the device for nondestructive testing of the surface of automobile die castings according to any one of claims 4 to 6, characterized in that: The steps include: The workpieces to be inspected are sequentially placed on the middle belt conveyor (23), and the middle belt conveyor (23) drives the workpieces to move toward the inspection conveyor frame (11). The inspection unit (3) moves to dock with the middle belt conveyor (23) under the drive of the driving unit (28). The belt transmission mechanism (12) thereon is synchronized with the middle belt conveyor (23) and runs in the same direction to synchronously receive the workpieces transported by the middle belt conveyor (23), and pauses when the sensor (16) detects that the workpiece moves to the inspection position. Then the driving unit (28) is started to drive the inspection unit (3) to rise to dock with the upper belt conveyor (22), and at the same time, the inspection unit (4) rises to dock with the middle belt conveyor (23) to take over the operation of the inspection unit (3). During the process of the inspection unit (3) rising, the inspection of the workpiece is completed; When the workpiece inspected by the first inspection part (3) is qualified, the belt transmission mechanism (12) thereon is started again and runs synchronously and in the same direction as the upper belt conveyor (22) to transfer the workpiece to the upper belt conveyor (22) for output, and then the driving part (28) is started again, so that the first inspection part (3) descends to return to dock with the middle belt conveyor (23) to carry out a new round of workpiece inspection cycle, and at the same time, the second inspection part (4) descends to dock with the lower belt conveyor (24) and performs the same inspection operation as the first inspection part (3) during the descent; If the workpiece inspected by the first detection part (3) is unqualified, the belt conveyor mechanism (12) thereon will not be started, and after the second detection part (4) completes the acceptance of the workpiece, the first drive part (28) will be started again. When the second detection part (4) is descending, the first detection part (3) also descends to dock with the middle belt conveyor (23), and at the same time, the second detection part (4) descends to dock with the lower belt conveyor (24). During the descent process, the second detection part (4) also completes the same inspection operation as the first detection part (3). After the first detection part (3) descends to dock with the middle belt conveyor (23), the NG material transition conveyor (27) on the NG material table (26) also completes the movement to dock with the belt conveyor of the first detection part (3) under the drive of the second drive part (29). Subsequently, the belt conveyor mechanism (12) on the first detection part (3) and the NG material transition conveyor (27) on the second detection part (26) are moved. 7) and the middle belt conveyor (23) are operated synchronously and in the same direction. At this time, the belt transmission mechanism (12) on the detection part (3) synchronously outputs unqualified workpieces to the NG material transition conveyor (27), and also synchronously receives the workpieces input by the middle belt conveyor (23). After receiving the workpieces in place, the workpiece detection operation is cyclically performed again until the two sets of detection parts (1) alternately complete the detection of all workpieces transported on the middle belt conveyor (23). After receiving the unqualified waste workpieces, the NG material transition conveyor (27) is driven by the driving part 2 (29) to descend to dock with the NG material recovery conveyor (20). After the NG material transition conveyor (27) and the NG material recovery conveyor (20) are started, they move synchronously and in the same direction, so that the workpieces on the NG material transition conveyor (27) move to the NG material recovery conveyor (20).

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