Die steel surface defect detection equipment

Abstract

The invention relates to the technical field of die steel detection, and discloses die steel surface defect detection equipment, which comprises a shaft chassis, a control part is mounted on the shaft chassis, the control part is used for controlling rotation of a die, a detection part is arranged on the control part, and the detection part is used for detecting the rotation angle of the die. A reference part is installed on the shaft base plate, the reference part is used for measuring the parallelism between the reference part and a mold, a compensation part is installed on the shaft base plate, the compensation part is used for compensating the overturning angle deviation value of the mold, and a three-stage mechanism of ultrasonic dynamic detection, mechanical adsorption calibration and infrared fine adjustment compensation is adopted. High-precision control from the rotation angle of the double dies to the horizontal position is achieved, when magnetic powder detection is adopted on the single-side movable die or synchronous magnetic powder detection is adopted on the two sides, the consistency of the detection position of the die steel can be ensured, dislocation deviation is avoided, and the detection position precision during continuous detection is improved.

Description

Technical Field

[0001] The invention relates to the technical field of die steel detection, in particular to a die steel surface defect detection device. Background Art

[0002] In the production and manufacturing process of mold steel, surface defect detection is crucial. With the growth of mold steel market demand, large-scale production has become a trend. Traditional detection methods are mostly manual detection one by one. Inspectors need to hold detection tools, such as simple magnifying glasses, templates, etc., to carefully check the surface of the mold steel. In this way, it often takes several minutes or even longer to detect a mold steel workpiece. In large-scale mold steel production enterprises, the daily output can reach hundreds or even thousands of pieces. Manual detection one by one is extremely inefficient and cannot meet the production rhythm, resulting in a large number of products piled up in the detection link, delaying the entire production cycle and increasing production costs.

[0003] When testing mold steel, it is a common problem that there is deviation in the placement position each time. When using methods such as magnetic particle testing and penetration testing, position deviation will cause errors in the test results. Taking magnetic particle testing as an example, when the mold steel is placed in different positions, the magnetic field distribution will change.

[0004] If the mold steel deviates from the standard inspection position, the magnetic powder accumulation in the area where defects should be shown may not be obvious, resulting in missed defects; or abnormal magnetic powder accumulation may occur in the normal area due to abnormal magnetic field, resulting in misjudgment as a defective area. In some mold steel application scenarios with extremely high precision requirements, misjudgment or missed detection may cause the entire mold to be scrapped, resulting in huge economic losses. Therefore, a mold steel surface defect detection device is proposed to solve the above-mentioned problems. Summary of the invention

[0005] 1. Technical issues to be resolved In view of the shortcomings of the prior art, the present invention provides a mold steel surface defect detection device, which solves the problem that mold steels are easily deviated from the standard detection position when being detected one by one, so that the magnetic powder aggregation in the area where defects should be displayed is not obvious, thereby causing defects to be missed.

[0006] (II) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mold steel surface defect detection device, comprising an axis chassis, a control unit is installed on the axis chassis, the control unit is used to control the rotation of the mold, a detection unit is arranged on the control unit, the detection unit is used to detect the rotation angle of the mold, a reference unit is installed on the axis chassis, the reference unit is used to measure the parallelism between itself and the mold, and a compensation unit is installed on the axis chassis, the compensation unit is used to compensate for the mold flipping angle deviation value.

[0007] Preferably, the control unit includes a mold turntable. A rotating groove is formed on the front surface of the shaft chassis. A rotating shaft is rotatably connected to the center of the shaft chassis. The mold turntable is fixedly sleeved on the rotating shaft. An installation plate is fixedly connected to the outer wall of the rotating shaft. A limiting plate is fixedly connected to the front end of the rotating shaft. The limiting plate is of a U-shaped structure. Four guiding rings are arrayedly connected to the outer wall of the shaft chassis.

[0008] Preferably, the detection unit includes a single-sided moving mold. Mounting feet are installed on the top of the single-sided moving mold. The single-sided moving mold is fixedly connected to the mold turntable through the mounting feet. A mold cavity is formed on the front surface of the single-sided moving mold. An integrated module is installed on one side of the single-sided moving mold. An ultrasonic sensing receiving unit I is installed on the integrated module and extends below the single-sided moving mold. A machine cover I is installed at the bottom of the single-sided moving mold. An ultrasonic sensing receiving unit II is installed on the integrated module and extends above the single-sided moving mold. A machine cover II is installed on the top of the single-sided moving mold. Lithium batteries are installed on both the machine cover I and the machine cover II. Electromagnets I are installed at the ends of the machine cover I and the machine cover II away from each other.

[0009] Preferably, a signal conditioning module is provided in the integrated module. The signal conditioning module is electrically connected to a signal processing unit, a power management module, and a communication module in sequence. Both the ultrasonic sensing receiving unit I and the ultrasonic sensing receiving unit II are electrically connected to the signal conditioning module. The ultrasonic sensing receiving unit I is electrically connected to the electromagnet I on the machine cover I. The ultrasonic sensing receiving unit II is electrically connected to the electromagnet I on the machine cover II.

[0010] Preferably, the number of the detection units is two. The two single-sided moving molds in the two detection units are installed on the installation plate. The two single-sided moving molds are symmetrically installed on the outer walls of the two ear ends of the limiting plate. An alarm lamp is installed on the front surface of the outer wall of the limiting plate. The alarm lamp is electrically connected to the signal processing unit in the two integrated modules.

[0011] Preferably, the reference unit includes a first arc-shaped plate. The first arc-shaped plate is installed at the bottom of the outer wall of the shaft chassis. Two first sliding rods are slidably connected to the first arc-shaped plate. The tops of the two first sliding rods are fixedly connected to a reference plate. An adsorption plate is installed on the top of the reference plate. An ultrasonic sensing transmitting unit I is installed on one side of the reference plate. An ultrasonic sensing transmitting unit II is installed on the other side of the reference plate. A shock-absorbing pad is fixedly connected to the bottom of the reference plate and is attached to the reference plate through the shock-absorbing pad.

[0012] Preferably, the ultrasonic sensing transmitting unit I is electrically connected to the ultrasonic sensing receiving unit I on the same side and the ultrasonic sensing receiving unit II on the other side. The ultrasonic sensing transmitting unit II is electrically connected to the ultrasonic sensing receiving unit I on the same side and the ultrasonic sensing receiving unit II on the other side.

[0013] Preferably, the compensation part includes an arc-shaped plate II, which is fixedly connected to one side of the outer wall of the shaft chassis. Two sliding rods II are slidably connected to the arc-shaped plate II. The ends of the two sliding rods II are fixedly connected with compensation blocks. An infrared sensing and transmitting unit I and an infrared sensing and transmitting unit II are installed on the inner arc surface of the arc-shaped plate II. The infrared sensing and transmitting unit I and the infrared sensing and transmitting unit II are symmetrically arranged. An infrared sensing and receiving unit is installed on the integrated module. The infrared sensing and receiving unit extends to one side of the single-sided moving die and is aligned with the infrared sensing and transmitting unit I. An electromagnet II and a lithium battery are embedded in the side wall of the single-sided moving die. The electromagnet II is electrically connected to the infrared sensing and receiving unit.

[0014] Preferably, the number of the compensation parts is two. The other compensation part is symmetrically installed on the other side of the outer wall of the shaft chassis. The two compensation blocks in the two compensation parts respectively abut against the side walls of the single-sided moving dies adjacent to themselves and attract each other with the adjacent electromagnets II in opposite polarities. The two infrared sensing and receiving units are both electrically connected to the two infrared sensing and transmitting unit Is and the two infrared sensing and transmitting unit IIs.

[0015] (III) Beneficial effects Compared with the prior art, the present invention provides a surface defect detection device for die steel, which has the following beneficial effects: 1. This surface defect detection device for die steel adopts a three-level mechanism of ultrasonic dynamic detection, mechanical adsorption calibration and infrared fine-tuning compensation to achieve high-precision control of the rotation angle of the double dies to the horizontal position. When magnetic particle detection is adopted on the single-sided moving die or synchronous magnetic particle detection is carried out on both sides, the consistency of the detection positions of the die steel can be ensured, avoiding dislocation deviation and improving the detection position accuracy during continuous detection.

[0016] 2. This surface defect detection device for die steel uses an ultrasonic sensing unit to detect the distance difference and angle deviation between the die steel and the reference plate, and cooperates with the electromagnet adsorption calibration to accurately identify the position state of the die steel. When the detected distance difference exceeds the threshold value, the electromagnet attracts the adsorption plate to generate mechanical tension, forcing the angle of the single-sided moving die to be adjusted to the horizontal state to ensure stable magnetic field distribution during magnetic particle detection and reducing the missed detection of defects caused by the position deviation of the die steel.

[0017] 3. This surface defect detection device for die steel can detect two die steels simultaneously. Compared with the traditional manual detection one by one, the detection time is greatly shortened. And through the automated detection and compensation process, there is no need for frequent manual intervention and adjustment, realizing continuous detection, effectively improving the detection efficiency and meeting the detection requirements of large-scale production.

[0018] 4. The surface defect detection equipment for die steel can correct problems such as the error of the rotating shaft caused by mechanical wear during long-term use. The equipment can be corrected through an infrared auxiliary compensation mechanism. The infrared sensor detects the residual error, and the compensation block cooperates with the electromagnet to achieve precise fine-tuning within ±0.2 mm, eliminating the small offsets accumulated by long-term wear and ensuring the accuracy and stability of detection.

[0019] 5. The surface defect detection equipment for die steel adopts a real-time feedback and alarm function. The alarm lamp installed on the front of the outer wall of the limit plate is electrically connected to the signal processing unit in the integrated module. When the flipping distance difference of the unilateral moving die exceeds ±0.2 cm, the alarm lamp will be triggered to prompt the deviation, reminding the operator to immediately stop the detection operation for inspection, avoiding inaccurate detection results caused by excessive position deviation of the die steel, and further ensuring the detection quality.

[0020] 6. The surface defect detection equipment for die steel adopts a non-contact detection technology. The equipment uses ultrasonic and infrared sensors for detection, which belongs to a non-contact detection method. This method reduces the direct contact and frictional loss between mechanical components, not only extends the service life of the equipment, but also avoids the damage that traditional contact detection may cause to the unilateral die and the surface of the die steel, ensuring that the quality of the die steel is not affected by the detection process. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of a surface defect detection equipment for die steel proposed by the present invention; Figure 2 It is a schematic diagram of the structure of the shaft chassis of a surface defect detection equipment for die steel proposed by the present invention; Figure 3 It is a connection diagram of the mounting plate and the unilateral moving die of a surface defect detection equipment for die steel proposed by the present invention; Figure 4 It is a schematic diagram of the structure of the detection part of a surface defect detection equipment for die steel proposed by the present invention; Figure 5 It is a schematic diagram of the structure of the reference part of a surface defect detection equipment for die steel proposed by the present invention; Figure 6 It is a bottom shaft view of the reference plate of a surface defect detection equipment for die steel proposed by the present invention; Figure 7 It is a schematic diagram of the structure of the compensation part of a surface defect detection equipment for die steel proposed by the present invention.

[0022] In the figure: 1. Axle chassis; 2. Control unit; 21. Mold turntable; 22. Rotating shaft; 23. Mounting plate; 24. Limiting plate; 25. Guide ring; 3. Alarm lamp; 4. Detection unit; 41. Single-sided moving mold; 42. Mounting foot; 43. Mold cavity; 44. Integrated module; 45. Ultrasonic sensing receiving unit I; 46. Hood I; 47. Ultrasonic sensing receiving unit II; 48. Hood II; 49. Electromagnet I; 5. Reference unit; 51. Arc plate I; 52. Slide bar I; 53. Reference plate; 54. Adsorption plate; 55. Ultrasonic sensing transmitting unit I; 56. Ultrasonic sensing transmitting unit II; 57. Shock pad; 6. Compensation unit; 61. Arc plate II; 62. Slide bar II; 63. Compensation block; 64. Infrared sensing transmitting unit I; 65. Infrared sensing transmitting unit II; 66. Infrared sensing receiving unit; 67. Electromagnet II. Detailed implementation mode

[0023] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figure 1-7 , the present invention provides a technical solution: a surface defect detection device for die steel, including an axle chassis 1, a control unit 2 is installed on the axle chassis 1, the control unit 2 is used to control the rotation of the mold, a detection unit 4 is arranged on the control unit 2, the detection unit 4 is used for detecting the rotation angle of the mold, a reference unit 5 is installed on the axle chassis 1, the reference unit 5 is used to measure the parallelism between itself and the mold, a compensation unit 6 is installed on the axle chassis 1, the compensation unit 6 is used to compensate the deviation value of the turning angle of the mold, the control unit 2 includes a mold turntable 21, a rotating groove is opened on the front surface of the axle chassis 1, a rotating shaft 22 is rotatably connected to the center of the axle chassis 1, the mold turntable 21 is fixedly sleeved on the rotating shaft 22, a mounting plate 23 is fixedly connected to the outer wall of the rotating shaft 22, a limiting plate 24 is fixedly connected to the front end of the rotating shaft 22, the limiting plate 24 is of a U-shaped structure, and four guide rings 25 are arrayedly connected to the outer wall of the axle chassis 1.

[0025] In this embodiment, the detection unit 4 includes a single-sided moving die 41. An installation foot 42 is installed on the top of the single-sided moving die 41. The single-sided moving die 41 is fixedly connected to the mold turntable 21 through the installation foot 42. A mold cavity 43 is formed on the front surface of the single-sided moving die 41. An integrated module 44 is installed on one side of the single-sided moving die 41. An ultrasonic sensing receiving unit one 45 is installed on the integrated module 44 and the ultrasonic sensing receiving unit one 45 extends below the single-sided moving die 41. A hood one 46 is installed at the bottom of the single-sided moving die 41. An ultrasonic sensing receiving unit two 47 is installed on the integrated module 44 and the ultrasonic sensing receiving unit two 47 extends above the single-sided moving die 41. A hood two 48 is installed on the top of the single-sided moving die 41. Lithium batteries are installed on both the hood one 46 and the hood two 48. Electromagnets one 49 are installed at the ends of the hood one 46 and the hood two 48 that are away from each other. A signal conditioning module is provided in the integrated module 44, which includes a TI ADS1115 analog-to-digital converter and an STM32F407VET6 microcontroller. The signal conditioning module is electrically connected to a signal processing unit, a power management module, and a communication module in sequence. Both the ultrasonic sensing receiving unit one 45 and the ultrasonic sensing receiving unit two 47 are electrically connected to the signal conditioning module. The ultrasonic sensing receiving unit one 45 is electrically connected to the electromagnet one 49 on the hood one 46. The ultrasonic sensing receiving unit two 47 is electrically connected to the electromagnet one 49 on the hood two 48. Both the ultrasonic sensing receiving unit one and the ultrasonic sensing receiving unit two 47 are 45 SICK WL12-3P2412 opposed-mode ultrasonic sensors, which support phase difference and intensity detection and are suitable for angle calculation during dynamic rotation.

[0026] There are two detection units 4. The two single-sided moving dies 41 in the two detection units 4 are installed on the mounting plate 23. The two single-sided moving dies 41 are symmetrically installed on the outer walls of the two ear ends of the limiting plate 24. An alarm lamp 3 is installed on the front surface of the outer wall of the limiting plate 24. The alarm lamp 3 is electrically connected to the signal processing unit in the two integrated modules 44. When the flipping distance difference of the single-sided moving die 41 exceeds ±0.2 cm, the alarm lamp 3 will be triggered.

[0027] It should be noted that the reference part 5 includes a first arc-shaped plate 51, the first arc-shaped plate 51 is installed at the bottom of the outer wall of the shaft chassis 1, two first sliding rods 52 are slidably connected to the first arc-shaped plate 51, the tops of the two first sliding rods 52 are fixedly connected to a reference plate 53, an adsorption plate 54 is installed on the top of the reference plate 53, a first ultrasonic sensing and transmitting unit 55 is installed on one side of the reference plate 53, a second ultrasonic sensing and transmitting unit 56 is installed on the other side of the reference plate 53, a shock pad 57 is fixedly connected to the bottom of the reference plate 53 and is in contact with the first arc-shaped plate 51 through the shock pad 57, when the reference plate 53 descends and resets, the shock pad 57 contacts the first arc-shaped plate 51 to absorb the impact and avoid rigid collision, the first ultrasonic sensing and transmitting unit 55 is electrically connected to the first ultrasonic sensing and receiving unit 45 on the same side and the second ultrasonic sensing and receiving unit 47 on the other side, the second ultrasonic sensing and transmitting unit 56 is electrically connected to the first ultrasonic sensing and receiving unit 45 on the same side and the second ultrasonic sensing and receiving unit 47 on the other side, and the models are all of the IFMO300 series, with a split design, the transmitting and receiving units are separated, and long-distance detection is supported. When the offset exceeds ±0.2 cm after the two single-sided moving molds 41 are flipped, the horizontal angle cannot be maintained, and thus a tilted posture to one side will be presented. At this time, one side of the reference plate 53 adsorbed by the first electromagnet 49 must not be able to fully fit the first electromagnet 49 on the same side. At this time, the first electromagnet 49 will not be triggered to stop, but the alarm lamp 3 will be directly triggered.

[0028] It should be noted that the compensation part 6 includes an arc-shaped plate two 61, which is fixedly connected to one side of the outer wall of the shaft chassis 1. Two sliding rods two 62 are slidably connected to the arc-shaped plate two 61. The ends of the two sliding rods two 62 are fixedly connected with a compensation block 63. A tension spring is elastically connected between the compensation block 63 and the arc-shaped plate two 61. An infrared sensing and transmitting unit one 64 and an infrared sensing and transmitting unit two 65 are installed on the inner arc surface of the arc-shaped plate two 61. The infrared sensing and transmitting unit one 64 and the infrared sensing and transmitting unit two 65 are symmetrically arranged and are both OPTEX AX-30V infrared sensors. An infrared sensing and receiving unit 66 is installed on the integrated module 44, using Sharp GP2Y0A02YK0F. The infrared sensing and receiving unit 66 extends to one side of the single-sided moving die 41 and is aligned with the infrared sensing and transmitting unit one 64. An electromagnet two 67 and a lithium battery are embedded in the side wall of the single-sided moving die 41. The electromagnet two 67 is electrically connected to the infrared sensing and receiving unit 66. There are two compensation parts 6, and the other compensation part 6 is symmetrically installed on the other side of the outer wall of the shaft chassis 1. The two compensation blocks 63 in the two compensation parts 6 respectively abut against the side wall of the single-sided moving die 41 adjacent to themselves and attract each other with the adjacent electromagnet two 67 with opposite polarities. When the compensation block 63 cannot be adsorbed by the electromagnet two 67 during flipping, it will be pulled back to its original position by the tension spring to prevent knocking other components. When the compensation block 63 is adsorbed by the electromagnet two 67, it can correct the rotation angle of the single-sided moving die 41 through the abutting force, and actively compensate and reset the single-sided moving die 41 with an error distance of ±0.2 cm to the horizontal. The two infrared sensing and receiving units 66 are both electrically connected to the two infrared sensing and transmitting units one 64 and the two infrared sensing and transmitting units two 65.

[0029] Working principle: Install two die steels in the die cavities 43 of the two single-sided moving dies 41 respectively, and perform magnetic particle inspection method and initial position calibration on the two die steels or the single-sided die steel. Before the two single-sided moving dies 41 rotate, they are in a horizontal state, that is, 0 degrees. The reference plate 53 of the reference part 5 is aligned with the ultrasonic sensing and receiving unit one 45 at the bottom of the two single-sided moving dies 41. The ultrasonic sensing and transmitting unit one 55 and the ultrasonic sensing and transmitting unit two 56 emit ultrasonic waves to the single-sided moving die 41 on the same side. The ultrasonic sensing and receiving unit one 45 calculates the initial distance difference between the reference plate 53 and the single-sided moving die 41 as ΔA1 and ΔB1 through the phase difference and intensity change. At the same time, the ultrasonic sensing and receiving unit one 45 activates the electromagnet one 49 on the hood one 46 through the integrated module 44, generates a suction force on the adsorption plate 54 to drive the ultrasonic sensing and transmitting unit one 55 and the ultrasonic sensing and transmitting unit two 56 to rise, so that the two electromagnets one 49 can correctly adsorb and fit the adsorption plate 54.

[0030] The two single-sided moving molds 41 rotate 180°. The two ultrasonic sensing receiving units II 47 are aligned with the ultrasonic sensing transmitting unit I 55 and the ultrasonic sensing transmitting unit II 56, and detect new distance differences of ΔA2 and ΔB2. The integrated module 44 calculates ΔA1 - ΔA2 = ΔB1 - ΔB2. If the differences are equal, it is determined that the rotation is accurate; otherwise, the alarm light 3 is triggered to indicate the deviation, and the detection operation should be immediately stopped for inspection.

[0031] Through the error compensation mechanism, first, active adsorption calibration is performed. When the detected distance difference is within the threshold range, such as ±0.2 mm, the electromagnet I 49 at the bottom of the single-sided moving mold 41 attracts the adsorption plate 54 of the reference plate 53, and the difference is small and can be overcome by the suction force. The angle of the single-sided moving mold 41 is forcibly adjusted by mechanical tension until the distance difference returns to zero.

[0032] Again, through the infrared auxiliary compensation mechanism, the infrared sensing transmitting unit I 64 and the infrared sensing transmitting unit II 65 of the compensation part 6 emit infrared signals to the single-sided moving mold 41. After the infrared sensing receiving unit 66 overcomes the distance difference within the threshold range through the above mechanical tension, the infrared sensing transmitting unit II 65 is realigned with the infrared sensing receiving unit 66. Combining the above, at this time, the two single-sided moving molds 41 have been flipped 180 degrees, so the infrared sensing transmitting unit II 65 is aligned with the infrared sensing receiving unit 66, and the infrared electrical signal activates the electromagnet II 67 to attract the compensation block 63, and by prompting the compensation block 63 to abut against the single-sided moving mold 41, the residual error within ±0.2 mm is further compensated.

[0033] This system realizes high-precision control of the rotation angle of the double molds to the horizontal position through a three-level mechanism of ultrasonic dynamic detection → mechanical adsorption calibration → infrared fine-tuning compensation. Magnetic particle detection is used on the single-sided moving mold 41 at the same position, or magnetic particle detection is performed synchronously on both sides. There will be no problem of misalignment deviation for the current mold steel and the mold steel added subsequently after replacement. It effectively improves the detection position accuracy during the continuous detection of mold steel, and effectively solves the error problem caused by mechanical wear during long-term use, ensuring the consistency and stability of each detection, and greatly improving the continuous detection efficiency.

[0034] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

Claims

1. A mold steel surface defect detection device, characterized in that: The invention comprises a shaft chassis (1), a control unit (2) being mounted on the shaft chassis (1), the control unit (2) being used to control the rotation of the mold, a detection unit (4) being arranged on the control unit (2), the detection unit (4) being used to detect the rotation angle of the mold, a reference unit (5) being mounted on the shaft chassis (1), the reference unit (5) being used to measure the parallelism between the reference unit and the mold, and a compensation unit (6) being mounted on the shaft chassis (1), the compensation unit (6) being used to compensate for the deviation value of the mold flipping angle.

2. The mold steel surface defect detection device according to claim 1, characterized in that: The control unit (2) comprises a mold turntable (21), a rotation groove is provided on the front side of the shaft chassis (1), the center of the shaft chassis (1) is rotatably connected to a rotation shaft (22), the mold turntable (21) is fixedly sleeved on the rotation shaft (22), the outer wall of the rotation shaft (22) is fixedly connected to a mounting plate (23), the front end of the rotation shaft (22) is fixedly connected to a limit plate (24), the limit plate (24) is a U-shaped structure, and the outer wall of the shaft chassis (1) is connected to four guide rings (25) in an array.

3. The mold steel surface defect detection device according to claim 2 is characterized in that: The detection part (4) comprises a single-sided movable mold (41), a mounting foot (42) is installed on the top of the single-sided movable mold (41), the single-sided movable mold (41) is fixedly connected to the mold turntable (21) through the mounting foot (42), a mold cavity (43) is opened on the front of the single-sided movable mold (41), an integrated module (44) is installed on one side of the single-sided movable mold (41), an ultrasonic sensor receiving unit (45) is installed on the integrated module (44), and the ultrasonic sensor receiving unit (45) extends to the single-sided movable mold (41). The single-sided movable mold (41) is provided with a hood 1 (46) at the bottom thereof, an ultrasonic sensor receiving unit 2 (47) is provided on the integrated module (44) and the ultrasonic sensor receiving unit 2 (47) extends to the top of the single-sided movable mold (41), a hood 2 (48) is provided on the top of the single-sided movable mold (41), the hood 1 (46) and the hood 2 (48) are both provided with lithium batteries, and an electromagnet 1 (49) is provided on the ends of the hood 1 (46) and the hood 2 (48) which are away from each other.

4. The mold steel surface defect detection device according to claim 3 is characterized in that: A signal conditioning module is provided in the integrated module (44), and the signal conditioning module is electrically connected to a signal processing unit, a power management module and a communication module in sequence. The ultrasonic sensor receiving unit 1 (45) and the ultrasonic sensor receiving unit 2 (47) are both electrically connected to the signal conditioning module. The ultrasonic sensor receiving unit 1 (45) is electrically connected to the electromagnet 1 (49) on the hood 1 (46), and the ultrasonic sensor receiving unit 2 (47) is electrically connected to the electromagnet 1 (49) on the hood 2 (48).

5. The mold steel surface defect detection device according to claim 4, characterized in that: There are two detection parts (4), two single-sided movable molds (41) in the two detection parts (4) are mounted on the mounting plate (23), and the two single-sided movable molds (41) are symmetrically mounted on the outer walls of the two ear ends of the limiting plate (24). An alarm light (3) is mounted on the front side of the outer wall of the limiting plate (24), and the alarm light (3) is electrically connected to the signal processing units in the two integrated modules (44).

6. The mold steel surface defect detection device according to claim 5, characterized in that: The reference part (5) comprises an arc plate (51), the arc plate (51) being mounted on the bottom of the outer wall of the shaft chassis (1), the arc plate (51) being slidably connected to two slide bars (52), the top ends of the two slide bars (52) being fixedly connected to a reference plate (53), the top of the reference plate (53) being mounted with an adsorption plate (54), one side of the reference plate (53) being mounted with an ultrasonic sensor transmitting unit (55), the other side of the reference plate (53) being mounted with an ultrasonic sensor transmitting unit (56), the bottom of the reference plate (53) being fixedly connected with a shock absorbing pad (57) and being bonded to the reference plate (53) via the shock absorbing pad (57).

7. The mold steel surface defect detection device according to claim 6, characterized in that: The ultrasonic sensor transmitting unit 1 (55) is electrically connected to the ultrasonic sensor receiving unit 1 (45) on the same side and the ultrasonic sensor receiving unit 2 (47) on the other side, and the ultrasonic sensor transmitting unit 2 (56) is electrically connected to the ultrasonic sensor receiving unit 1 (45) on the same side and the ultrasonic sensor receiving unit 2 (47) on the other side.

8. The mold steel surface defect detection device according to claim 7, characterized in that: The compensation part (6) includes an arc plate 2 (61), the arc plate 2 (61) is fixedly connected to one side of the outer wall of the shaft chassis (1), and two sliding rods 2 (62) are slidably connected to the arc plate 2 (61), and the ends of the two sliding rods 2 (62) are fixedly connected to compensation blocks (63), and the inner arc surface of the arc plate 2 (61) is installed with an infrared sensor emitting unit 1 (64) and an infrared sensor emitting unit 2 (65), and the infrared sensor emitting unit 1 (64) and the infrared sensor emitting unit 2 (65) are symmetrically arranged.

9. The mold steel surface defect detection device according to claim 8, characterized in that: An infrared sensor receiving unit (66) is installed on the integrated module (44), and the infrared sensor receiving unit (66) extends to one side of the single-sided movable mold (41) and is aligned with the infrared sensor emitting unit 1 (64). The side wall of the single-sided movable mold (41) is embedded with an electromagnet 2 (67) and a lithium battery, and the electromagnet 2 (67) is electrically connected to the infrared sensor receiving unit (66).

10. The mold steel surface defect detection device according to claim 9, characterized in that: There are two compensation parts (6), and another compensation part (6) is symmetrically mounted on the other side of the outer wall of the shaft chassis (1). The two compensation blocks (63) in the two compensation parts (6) are respectively abutted against the side walls of the unilateral movable mold (41) adjacent to themselves and are attracted to the adjacent electromagnet 2 (67) by opposite polarities. The two infrared sensor receiving units (66) are electrically connected to the two infrared sensor transmitting units 1 (64) and the two infrared sensor transmitting units 2 (65).

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