Automatic flaw detection device for disc-shaped casting

Abstract

The invention relates to an automatic flaw detection device for a butterfly-shaped casting, the automatic flaw detection device comprises a flaw detection assembly and a fixing tool for fixing the butterfly-shaped casting, the flaw detection assembly comprises an ultrasonic generator, an ultrasonic sensor, flaw detection assembly body equipment and a detection moving part, and the ultrasonic generator and the ultrasonic sensor are integrated on the detection moving part; the detection movable part can transversely move to perform flaw detection on a to-be-detected workpiece, the fixing tool comprises a supporting frame and a fixing frame, the fixing frame can slide relative to the supporting frame to give way to the current space where the fixing frame is located, and the detection movable part is connected with a first contact type detection sensor; a driving assembly for driving the fixing frame to slide is arranged on the supporting frame, and the driving assembly is connected with the first contact type detection sensor and responds to a trigger signal of the first contact type detection sensor; the method and the device have the technical effects that the detection accuracy is improved, and the detection mode is simple.

Description

Technical Field

[0001] The present application relates to the technical field of ultrasonic flaw detection, and in particular to an automatic flaw detection device for disc-shaped castings. Background Art

[0002] Ultrasonic flaw detectors are a method of inspecting defects in parts by using the characteristics of ultrasonic energy penetrating deep into metal sheets and reflecting at the edge of the interface when entering from one section to another. Ultrasonic flaw detectors can quickly, conveniently, non-destructively and accurately detect, locate, evaluate and diagnose a variety of defects (including longitudinal cracks, transverse cracks, looseness, pores, slag inclusions, etc.) inside metal sheet workpieces. It can be used in laboratories as well as on-site projects.

[0003] When the existing ultrasonic flaw detection device for metal plates is in use, the ultrasonic probe is usually controlled by the detection device to perform detection. When the detection device performs detection at the same time, it is first necessary to fix the workpiece to be detected so that it remains stable during the entire detection process. At this time, if a butterfly part is to be detected, because the butterfly part is an irregular geometric body, if stable fixation is required, a larger area needs to be covered for fixation. However, the tooling assembly used to fix the workpiece to be detected will block the detection device probe from detecting the blocked area, and thus the overall detection image of the metal plate cannot be formed. At this time, the undetected part can only be detected after clamping again, and the operation is very cumbersome. Summary of the invention

[0004] In order to solve the above technical problems, the present application provides an automatic flaw detection device for disc-shaped castings.

[0005] The present application provides an automatic flaw detection device for disc-shaped castings, which adopts the following technical solution: An automatic flaw detection device for a disc-shaped casting comprises a flaw detection component and a fixing fixture for fixing the butterfly-shaped casting, wherein the flaw detection component comprises an ultrasonic generator, an ultrasonic sensor, a flaw detection component main body equipment and a detection movable part, wherein the ultrasonic generator and the ultrasonic sensor are integrated in the detection movable part, and the detection movable part can move laterally to perform flaw detection on a workpiece to be detected, wherein the fixing fixture comprises a support frame and a fixing frame, wherein the fixing frame can slide relative to the support frame to make way for the space in which it is currently located, wherein a first contact detection sensor is connected to the detection movable part, wherein a driving component for driving the fixing frame to slide is arranged on the support frame, wherein the driving component is connected to the first contact detection sensor and responds to a trigger signal of the first contact detection sensor, and makes way and moves under the action of the trigger signal.

[0006] By adopting the above technical solution, the detection movable part is integrated with an ultrasonic generator and an ultrasonic sensor, so that an ultrasonic signal can be emitted by the ultrasonic generator. After the ultrasonic signal contacts the workpiece to be detected, it returns and is received by the ultrasonic sensor, and then the signal is transmitted to the main equipment of the flaw detection component, so that the damage image of the entire workpiece to be detected can be obtained. Since only a fixed tool is set to fix the workpiece to be detected, at this time, from the side of the workpiece to be detected, only a vertical rod-shaped part is blocked. When the detection movable part moves to this part during the lateral movement, the first contact detection sensor will contact the fixed frame and generate a trigger signal. At this time, the fixed frame can be driven to move by the driving component. The fixed frame will still stably support the workpiece to be detected during the movement. After the movement is completed, the detection movable part can continue to move. This method can detect the side of the entire workpiece to be detected. There is actually no obstruction during the entire detection process, thereby improving the detection efficiency.

[0007] Preferably, the support frame includes a base and a vertical support seat detachably connected to the base, the fixed frame includes a sliding plate slidably connected to the base, the sliding plate is provided with a hinged rod that can abut against the side of the workpiece to be detected, a fixed rod is provided between the hinged rod and the workpiece to be detected, the other end of the fixed rod is fixedly connected to the sliding plate, and the fixed rod is provided with a positioning assembly that can abut against the upper inclined surface of the hinged rod to control the hinged rod to tightly abut against the side of the workpiece to be detected; the positioning assembly includes a counterweight positioning ball and a nut assembly threadedly connected to the upper end of the fixed rod, and the nut assembly is located above the counterweight positioning ball.

[0008] By adopting the above technical solution, specifically, when the workpiece to be inspected is placed on the base, the hinged rod can be rotated to make it abut against the side of the workpiece to be inspected. At this time, the hinged rod can be pressed downward by the positioning assembly. At this time, the hinged rod and the vertical support seat cooperate with each other to provide stable support for the workpiece to be inspected. The specific method is to give an inclined pressure downward to the hinged rod through the counterweight positioning ball, and then rotate the nut assembly to make it abut against the top of the counterweight positioning ball, so as to achieve stable fixation and facilitate the next step of detection.

[0009] Preferably, the articulated rod comprises a first articulated rod and a second articulated rod, the first articulated rod and the second articulated rod are parallel to each other, the rotating frame is divided into two parts and are respectively articulated to the first articulated rod and the second articulated rod, the sliding plates are divided into two groups and correspond to the first articulated rod and the second articulated rod respectively, a threading screw is rotatably connected on the base, and the two pairs of thread parts of the threading screw are respectively threadedly connected to the two sliding plates; when the contact end of the first contact detection sensor detects that it does not contact the first articulated rod or the second articulated rod, it can control the displacement of the detection movable part, a first contact area is provided on the side of the first articulated rod, and a second contact detection sensor is provided at the first contact area, and when the second contact detection sensor receives a signal, the threading screw is controlled to rotate to control the first articulated rod and the second articulated rod to move away from each other, a second contact area is provided on the side of the second articulated rod, and a second contact detection sensor is provided at the second contact area, and when the second contact detection sensor receives a signal, the threading screw is controlled to rotate to control the first articulated rod and the second articulated rod to move closer to each other.

[0010] By adopting the above technical solution, when the first contact detection sensor does not contact the first hinged rod or the second hinged rod, it is proved that there is no obstruction in the current detection area of ​​the detection movable part, and the detection can continue. When the sensing end of the first contact detection sensor contacts the first hinged rod, the second contact detection sensor on the first hinged rod will also be triggered synchronously. At this time, the threading screw will rotate, driving the first hinged rod and the second hinged rod to move away from each other. During the process of moving away, the sensing end of the first contact detection sensor always contacts the first contact area, and then the detection movable part will not move at this time. When the first hinged rod moves and disengages, the detection movable part can continue to move. When the detection movable part contacts the second hinged rod, it can also trigger the threading screw to reverse, and then control the first hinged rod and the second hinged rod to approach each other. When they are separated, the detection movable part continues to move, thereby realizing the detection of the entire area. At the same time, due to the existence of the counterweight positioning ball, when the first hinged rod and the second hinged rod are approaching or moving away from each other, they will always be stably in contact with the side of the workpiece to be detected under the action of the counterweight positioning ball, so that the workpiece to be detected can be stably fixed without manual intervention.

[0011] Preferably, the vertical support seat includes a vertical support frame and a support plate fixedly connected to the vertical support frame, the vertical support frame and the support plate are both hollow structures and are interconnected, and the vertical support frame is provided with a cooling water inlet and a cooling water outlet.

[0012] By adopting the above technical solution, a hollow structure is set and a cooling water inlet and outlet are set in the hollow structure. When the ultrasonic generator generates an ultrasonic signal, high-frequency vibration will be generated, thereby causing the metal plate to heat up. By setting cooling water, partial cooling can be achieved, making it easier for the operator to move the workpiece after the inspection is completed.

[0013] Preferably, a plurality of cooling holes are provided on the top of the vertical support frame, and control valves for closing or opening the cooling holes are provided at the cooling holes.

[0014] By adopting the above technical solution and providing cooling holes, when the workpiece needs to be removed after the entire inspection is completed, some cooling water can be sprayed through the cooling holes, so that the workpiece can be quickly cooled after the entire inspection is completed, which is convenient for subsequent operations.

[0015] Preferably, a plurality of channels are arranged inside the vertical support frame, a plurality of throttling blocks are arranged in the channels, a gap for the water supply flow channel is left between the throttling blocks and the inner sides of the channels, and the throttling blocks are made of rubber and are deformable when heated.

[0016] Preferably, throttle plates are arranged on both sides of the throttling block, the throttling block protrudes from the throttling plate, the throttling plate is made of heat insulating material, an opening is arranged on the vertical support frame at a position corresponding to the throttling block and a heat conducting plate is fixedly connected to the opening.

[0017] By adopting the above technical solution and setting a throttling block, the water flow space of the entire channel is made thinner, so that the water flow is concentrated and stored between two adjacent throttling blocks. When the detection movable part moves for detection, high temperature will be generated in the detected area. At this time, the throttling block will be deformed by the heat, which can make the water flow quickly to the area, and the backflow will not flow out directly, which can effectively avoid the waste of cooling water resources.

[0018] Preferably, the top of the hinged rod is hinged with a rotating frame that can rotate relative to the hinged rod, the rotating axis of the rotating frame is parallel to the rotating axis of the hinged rod rotating relative to the sliding plate, and two rubber rods that can abut against the side of the workpiece to be inspected are vertically arranged on the rotating frame.

[0019] Preferably, the rotating frame includes a rotating rod and a rotating bracket rotatably connected to the rotating rod, and the rubber rod is fixedly connected to the rotating bracket.

[0020] By adopting the above technical solution, the butterfly-shaped detection part is usually not easy to fix. By setting up a hinged rotating frame and arranging two rubber rods on the rotating frame that can abut against the workpiece to be detected, the contact area of ​​the rubber rod can be effectively increased, three-point positioning can be achieved, and the workpiece to be detected can be stably supported.

[0021] Preferably, a resistance plate is slidably connected to the base in a direction close to the vertical support frame, and a transverse driving member is provided on the resistance plate to drive its movement. A pressure sensing sensor is provided on the rubber rod, and the pressure sensing sensor outputs a pressure sensing signal when sensing a pressure value. The transverse driving member responds to the pressure sensing signal and controls the resistance plate to move in a direction close to the vertical support frame when receiving the pressure sensing signal.

[0022] By adopting the above technical solution, by setting a resistance plate and responding to the signal of the pressure sensing sensor, the resistance plate and the rubber rod work together to stably fix the workpiece to be detected on the support frame, which makes the operation simpler and more convenient.

[0023] In summary, the present application includes at least one of the following beneficial technical effects: 1. The detection movable part is integrated with an ultrasonic generator and an ultrasonic sensor, so that an ultrasonic signal can be emitted through the ultrasonic generator. After the ultrasonic signal contacts the workpiece to be detected, it returns and is received by the ultrasonic sensor. Then, the signal is transmitted to the main equipment of the flaw detection component, so that the damage image of the entire workpiece to be detected can be obtained. Since only a fixed tool is set to fix the workpiece to be detected, at this time, from the side of the workpiece to be detected, only a vertical rod-shaped part is blocked. When the detection movable part moves to this part during the lateral movement, the first contact detection sensor will contact the fixed frame and generate a trigger signal. At this time, the fixed frame can be driven to move by the driving component. The fixed frame will still stably support the workpiece to be detected during the movement. After the movement is completed, the detection movable part can continue to move. This method can detect the side of the entire workpiece to be detected. There is actually no obstruction during the entire detection process, which improves the detection efficiency. 2. When the first contact detection sensor does not contact the first hinged rod or the second hinged rod, it proves that there is no obstruction in the current detection area of ​​the detection movable part, and the detection can continue; when the sensing end of the first contact detection sensor contacts the first hinged rod, the second contact detection sensor on the first hinged rod will also be triggered synchronously, and the threading screw will rotate, driving the first hinged rod and the second hinged rod to move away from each other. During the process of moving away, the sensing end of the first contact detection sensor always contacts the first contact area, and the detection movable part will not move at this time. When the first hinged rod moves and disengages, the detection movable part can continue to move. When the detection movable part contacts the second hinged rod, it can also trigger the threading screw to reverse, thereby controlling the first hinged rod and the second hinged rod to approach each other. When disengaged, the detection movable part continues to move, thereby realizing detection of the entire area.

[0024] 3. When the workpiece to be inspected is placed on the base, the hinged rod can be rotated to make it abut against the side of the workpiece to be inspected. At this time, the hinged rod can be pressed downward by the positioning assembly. At this time, the hinged rod and the vertical support seat cooperate with each other to stably support the workpiece to be inspected. The specific method is to give an inclined pressure downward to the hinged rod through the counterweight positioning ball, and then rotate the nut assembly to make it abut against the top of the counterweight positioning ball to achieve stable fixation, which is convenient for the next step of detection; at the same time, due to the existence of the counterweight positioning ball, when the first hinged rod and the second hinged rod approach or move away from each other, they will always be stably abutted against the side of the workpiece to be inspected under the action of the counterweight positioning ball, so as to achieve stable fixation of the workpiece to be inspected without manual intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the embodiment; Figure 2 is a structural schematic diagram highlighting the connection method of the first hinge rod and the second hinge rod in the embodiment; Figure 3 is a schematic diagram highlighting the position of the contact detection sensor in the embodiment; Figure 4 is a schematic diagram highlighting the signal transmission direction of the contact detection sensor in the embodiment; Figure 5 is a schematic diagram of the structure of the embodiment highlighting the vertical support seat; Figure 6 It is a schematic diagram highlighting the structure of the throttling block inside the channel in the embodiment.

[0026] Explanation of reference numerals: 1. flaw detection assembly; 11. ultrasonic generator; 12. ultrasonic sensor; 13. flaw detection assembly main equipment; 14. detection movable part; 141. first contact detection sensor; 142. second contact detection sensor; 143. third contact detection sensor; 2. fixed tooling; 21. support frame; 211. base; 2111. contact plate; 212. vertical support seat; 2121. vertical support frame; 2122. support plate; 2123. cooling water inlet; 2124. cooling water outlet 2125, cooling hole; 2126, channel; 2127, throttle block; 2128, heat conduction plate; 2129, throttle plate; 213, reinforcing rod; 22, fixed frame; 221, sliding plate; 222, hinged rod; 2221, first hinged rod; 2222, second hinged rod; 23, slide groove; 231, threading screw; 232, driving motor; 24, fixed rod; 241, counterweight positioning ball; 242, nut assembly; 25, rotating frame; 251, rotating rod; 252, rotating bracket; 253, rubber rod. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-6 This application is described in further detail.

[0028] The present application discloses an automatic flaw detection device for disc-shaped castings. Figure 1 , including a flaw detection component 1 and a fixing tool 2 for fixing a butterfly casting; the flaw detection component 1 includes an ultrasonic generator 11, an ultrasonic sensor 12, a flaw detection component main equipment 13 and a detection movable part 14, wherein the ultrasonic generator 11 and the ultrasonic sensor 12 are integrated on the detection movable part 14, and the detection movable part 14 can be installed on a prefabricated transverse rod, so that the entire detection movable part 14 can move horizontally to scan the workpiece to be detected, and the detection movable part 14 can be driven to move by an electric hydraulic cylinder.

[0029] Reference Figure 1 and Figure 2 The fixing tool 2 includes a support frame 21 and a fixing frame 22. The support frame 21 includes a base 211 and a vertical support seat 212. The base 211 and the vertical support seat 212 are detachably connected by bolts. A reinforcing rod 213 is arranged on the back side of the vertical support seat 212. One end of the reinforcing rod 213 is fixedly connected to the vertical support seat 212, and the other end is fixedly connected to the base 211. The fixing frame 22 is arranged at the front position of the vertical support seat 212; the fixing frame 22 includes a sliding plate 221 and a hinge rod 222, wherein the hinge rod 222 includes a first hinge that fits each other. The connecting rod 2221 and the second hinge rod 2222 are provided with a horizontal slide groove 23 on the base 211. The sliding plates 221 are divided into two groups and are arranged in the slide groove 23. The sliding plates 221 can slide in the slide groove 23. A threading screw 231 is also arranged in the slide groove 23. The two sliding plates 221 are respectively threadedly connected to the two sides of the threading screw 231, so that when the threading screw 231 rotates, the two sliding plates 221 can be driven to move closer to or away from each other. A driving motor 232 is arranged in the slide groove 23, and the output shaft of the driving motor 232 is coaxially fixedly connected to the threading screw 231.

[0030] The first hinge rod 2221 and the second hinge rod 2222 are respectively hingedly arranged on the corresponding sliding plate 221. A through strip groove is arranged at the middle of the first hinge rod 2221 and the second hinge rod 2222. A fixing rod 24 is inserted into the strip groove. The bottom of the fixing rod 24 is fixedly connected to the corresponding sliding plate 221, so that the fixing plate can move with the sliding plate 221. A positioning assembly is arranged at the upper end of the fixing rod 24, and the positioning assembly includes a counterweight positioning ball 241 and a screw threaded connection to the fixing rod 24. The nut assembly 242 is at the upper end of the rod 24, and the nut assembly 242 is located above the counterweight positioning ball 241; a rotating frame 25 that can rotate relative to the first hinged rod 2221 and the second hinged rod 2222 is hingedly connected at the upper ends thereof, and the rotating axis of the rotating frame 25 and the rotating axis of the hinged rod 222 rotating relative to the sliding plate 221 are parallel to each other, and the rotating frame 25 includes a rotating rod 251 and a rotating bracket 252 rotatably connected to the rotating rod 251, and two rubber rods 253 are fixedly connected to the rotating bracket 252 in the vertical direction.

[0031] Reference Figure 1 and Figure 3 A first contact detection sensor 141 is arranged on the detection movable part 14, a second contact detection sensor 142 is arranged at a position corresponding to the first contact detection sensor 141 on the first hinge rod 2221, and a third contact detection sensor 143 is arranged at a position corresponding to the first contact detection sensor 141 on the second hinge rod 2222, wherein the sensing ends of the second contact detection sensor 142 and the third contact detection sensor 143 both cover the side annular surface position of the corresponding hinge rod 222, so as to form a first contact area corresponding to the second contact detection sensor 142 and a second contact area corresponding to the third contact detection sensor 143; the sensing end of the first contact detection sensor 141 protrudes from the detection movable part 14 and can contact the first contact area and the second contact area.

[0032] Reference Figure 1 and Figure 4When the first contact detection sensor 141 does not contact the first contact area or the second contact area, the detection movable part 14 is driven to move by the electric hydraulic cylinder, and then the flaw detection work is started from one side. There is no obstruction during the flaw detection process. When the first contact detection sensor 141 touches the first contact area, the first contact detection sensor 141 will feedback a low-level signal, thereby controlling the electric hydraulic cylinder to stop the action. At this time, since the first contact area is the sensing end of the second contact detection sensor 142, a high-level signal can be output by the second contact detection sensor 142, thereby controlling the drive motor 232 to rotate, so that the first hinge rod 2221 and the second hinge rod 2222 move away from each other. In the process of the first hinge rod 2221 and the second hinge rod 2222 moving away from each other, under the downward gravity of the counterweight positioning ball 241, the rubber rod 253 will still contact the side of the workpiece to be detected, and no manual operation is required. It can also achieve stable fixation and improve efficiency; during the operation of the driving motor 232, the first contact detection sensor 141 always contacts the first contact area until it is separated. When the first contact detection sensor 141 is separated from the first contact area, the first contact detection sensor 141 outputs a high-level signal to control the detection movable part 14 to continue moving for detection. When the first contact detection sensor 141 contacts the second contact area, the electric hydraulic cylinder stops working. At this time, the third contact detection sensor 143 outputs a high-level signal to control the driving motor 232 to reverse and thus make the first hinged rod 2221 and the second hinged rod 2222 approach each other until the sensing end of the first contact detection sensor 141 is separated from the second contact area. At this time, the first contact detection sensor 141 outputs a high-level signal to control the electric hydraulic cylinder to continue working, thereby completing the flaw detection work of the workpiece to be detected, and effectively avoiding obstruction during the entire flaw detection process.

[0033] A resistance plate 2111 is slidably connected to the base 211 in a direction close to the vertical support frame 2121. A transverse driving member is provided on the resistance plate 2111 to drive its movement. A pressure sensing sensor is provided on the rubber rod 253. The pressure sensing sensor outputs a pressure sensing signal when sensing a pressure value. The transverse driving member responds to the pressure sensing signal and controls the resistance plate 2111 to move in a direction close to the vertical support frame 2121 when receiving the pressure sensing signal. The transverse driving member can be a cylinder.

[0034] Reference Figure 5 and Figure 6The vertical support seat 212 includes a vertical support frame 2121 and a support plate 2122 fixedly connected to the vertical support frame 2121. The vertical support frame 2121 and the support plate 2122 are both hollow structures and are interconnected. The vertical support frame 2121 is provided with a cooling water inlet 2123 and a cooling water outlet 2124. The top of the vertical support frame 2121 is provided with a plurality of cooling holes 2125. The cooling holes 2125 are provided with control valves for closing or opening them. The vertical support frame 2121 is provided with a plurality of channels 2 126, a plurality of throttling blocks 2127 are arranged in the channel 2126, a gap for the water supply channel 2126 is left between the throttling blocks 2127 and the inner side of the channel 2126, the throttling blocks 2127 are made of rubber material and can be deformed by heat; throttling plates 2129 are arranged on both sides of the throttling blocks 2127, the throttling blocks 2127 protrude from the throttling plates 2129, the throttling plates 2129 are made of heat insulating material, an opening is arranged at the position corresponding to the throttling block 2127 on the vertical support frame 2121, and a heat conducting plate 2128 is fixedly connected to the opening.

[0035] Providing the support plate 2122 can effectively increase the contact area. When flaw detection is performed step by step from left to right by detecting the movable part 14, cooling water can be injected into the cooling water inlet 2123 on the left. At this time, due to the existence of the throttling block 2127, each channel 2126 has only a very fine gap for water to flow through. As the ultrasonic generator 11 works, the surface temperature of the workpiece to be detected increases, which in turn drives the throttling block 2127 to deform due to heat, so that the gap at the corresponding position becomes larger, allowing water to pass through, thereby increasing the cooling area of ​​the water flow, so that the temperature of the detection area can be reduced to a certain extent, and only the contact cross-section of the detection area will increase, which can effectively save resources.

[0036] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An automatic flaw detection device for disc-shaped castings, characterized in that: The invention comprises a flaw detection component (1) and a fixing fixture (2) for fixing a butterfly casting. The flaw detection component (1) comprises an ultrasonic generator (11), an ultrasonic sensor (12), a flaw detection component main body equipment (13) and a detection movable part (14). The ultrasonic generator (11) and the ultrasonic sensor (12) are integrated in the detection movable part (14). The detection movable part (14) can move laterally to detect flaws on a workpiece to be detected. The fixing fixture (2) comprises a support frame (21) and a fixing frame (22). The fixing frame (22) can slide relative to the support frame (21) to make way for the space in which it is currently located. The detection movable part (14) is connected to a first contact detection sensor (141). The support frame (21) is provided with a driving component for driving the fixing frame (22) to slide. The driving component is connected to the first contact detection sensor (141) and responds to a trigger signal of the first contact detection sensor (141) and makes way for movement under the action of the trigger signal.

2. The automatic flaw detection device for disc-shaped castings according to claim 1, characterized in that: The support frame (21) comprises a base (211) and a vertical support seat (212) detachably connected to the base (211); the fixed frame (22) comprises a sliding plate (221) slidably connected to the base (211); a hinged rod (222) capable of contacting the side of a workpiece to be detected is arranged on the sliding plate (221); a fixed rod (24) is arranged between the hinged rod (222) and the workpiece to be detected; the other end of the fixed rod (24) is fixedly connected to the sliding plate (221); a positioning component capable of contacting the upper inclined surface of the hinged rod (222) to control the hinged rod (222) to contact tightly with the side of the workpiece to be detected is arranged on the fixed rod (24); the positioning component comprises a counterweight positioning ball (241) and a nut component (242) threadedly connected to the upper end of the fixed rod (24); the nut component (242) is located above the counterweight positioning ball (241).

3. The automatic flaw detection device for disc-shaped castings according to claim 2 is characterized in that: The hinge rod (222) comprises a first hinge rod (2221) and a second hinge rod (2222), the first hinge rod (2221) and the second hinge rod (2222) are parallel to each other, the sliding plates (221) are two groups and correspond to the first hinge rod (2221) and the second hinge rod (2222) respectively, a threaded screw rod (231) is rotatably connected to the base (211), and two pairs of threaded parts of the threaded screw rod (231) are respectively threadedly connected to the two sliding plates (221); when the contact end of the first contact detection sensor (141) detects that it is not in contact with the first hinge rod (2221) or the second hinge rod (2222), it can control the displacement of the detection movable part (14), A first contact area is provided on the side of the first hinged rod (2221), and a second contact detection sensor (142) is provided at the first contact area. When the second contact detection sensor (142) receives a signal, it controls the threading screw (231) to rotate so as to control the first hinged rod (2221) and the second hinged rod (2222) to move away from each other. A second contact area is provided on the side of the second hinged rod (2222), and a second contact detection sensor (142) is provided at the second contact area. When the second contact detection sensor (142) receives a signal, it controls the threading screw (231) to rotate so as to control the first hinged rod (2221) and the second hinged rod (2222) to move closer to each other.

4. The automatic flaw detection device for disc-shaped castings according to claim 2, characterized in that: The vertical support seat (212) comprises a vertical support frame (2121) and a support plate (2122) fixedly connected to the vertical support frame (2121); the vertical support frame (2121) and the support plate (2122) are both hollow structures and are interconnected; and the vertical support frame (2121) is provided with a cooling water inlet (2123) and a cooling water outlet (2124).

5. The automatic flaw detection device for disc-shaped castings according to claim 4 is characterized in that: A plurality of cooling holes (2125) are provided on the top of the vertical support frame (2121), and control valves for closing or opening the cooling holes (2125) are provided on the cooling holes (2125).

6. The automatic flaw detection device for disc-shaped castings according to claim 4, characterized in that: A plurality of channels (2126) are arranged inside the vertical support frame (2121), a plurality of throttling blocks (2127) are arranged inside the channels (2126), a gap for supplying water flow channels (2126) is left between the throttling blocks (2127) and the inner side of the channels (2126), and the throttling blocks (2127) are made of rubber and are deformable when heated.

7. The automatic flaw detection device for disc-shaped castings according to claim 6, characterized in that: Throttle plates (2129) are arranged on both sides of the throttle block (2127), the throttle block (2127) protrudes from the throttle plate (2129), the throttle plate (2129) is made of a heat-insulating material, and an opening is arranged on the vertical support frame (2121) at a position corresponding to the throttle block (2127), and a heat-conducting plate (2128) is fixedly connected to the opening.

8. The automatic flaw detection device for disc-shaped castings according to claim 4, characterized in that: A rotating frame (25) is hingedly connected to the top of the hinged rod (222) and can rotate relative to the hinged rod (222). The rotating axis of the rotating frame (25) and the rotating axis of the hinged rod (222) rotating relative to the sliding plate (221) are parallel to each other. Two rubber rods (253) that can abut against the side of the workpiece to be detected are vertically arranged on the rotating frame (25).

9. The automatic flaw detection device for disc-shaped castings according to claim 8, characterized in that: The rotating frame (25) comprises a rotating rod (251) and a rotating bracket (252) rotatably connected to the rotating rod (251), and the rubber rod (253) is fixedly connected to the rotating bracket (252).

10. The automatic flaw detection device for disc-shaped castings according to claim 9, characterized in that: The base (211) is slidably connected with a resistance plate (2111) in a direction close to the vertical support frame (2121); the resistance plate (2111) is provided with a transverse driving member for driving the resistance plate (2111) to move; the rubber rod (253) is provided with a pressure sensing sensor; the pressure sensing sensor outputs a pressure sensing signal when sensing a pressure value; the transverse driving member responds to the pressure sensing signal and controls the resistance plate (2111) to move in a direction close to the vertical support frame (2121) when receiving the pressure sensing signal.

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