A hole position detection method for a gearbox housing die casting

Abstract

The present invention relates to the technical field of hole position detection, and provides a hole position detection device for a gearbox housing die casting, comprising a mounting frame, an electric push rod fixedly connected to the bottom of the mounting frame, a support box fixedly connected to the bottom of the electric push rod, a pressurizing mechanism provided at the bottom of the support box, a grinding mechanism provided on the inner wall of the support box, an expansion mechanism provided at one end of the pressurizing mechanism away from the support box, and horizontal magnetic blocks fixedly connected to the left and right inner walls of the support box. In the hole position detection method for the gearbox housing die casting, a circular plate enables the hole entry block to move downward and be inserted into the hole, and the clamping plate is limited by the hole position area and rotates in the direction of the connecting rod. The clamping plate compresses the torque spring using a rotating shaft. When the hole entry block completely enters the hole and the clamping plate rotates, the contact switch starts to work. When the clamping plate is not in contact with the contact switch, an alarm sounds an alarm. At this time, it can be determined that the hole diameter is too large and the die casting cannot be used normally.

Description

Technical Field

[0001] The invention relates to the technical field of hole position detection, and in particular to a method for detecting the hole position of a gearbox housing die casting. Background Art

[0002] The gearbox is a mechanism used to change the speed and torque from the engine. It can fix or change the transmission ratio of the output shaft and the input shaft in stages. It is commonly used in automobiles. The transmission is usually produced by die casting. The accuracy of the die casting holes determines the firmness of the gearbox.

[0003] In the prior art, the die-casting production of gearboxes will produce defective products. The inner wall of the hole is rough and not conducive to use. The hole detection equipment can only determine the position of the hole, but cannot further detect the state of the inner wall of the hole. In addition, the hole diameter is too large, so even if the hole is correct, it cannot be used.

[0004] Therefore, the demand for high-reliability products is imminent, so we proposed a hole position detection method for gearbox housing die castings, which has the effect of using friction resistance to increase hydraulic pressure for burr treatment and using aperture extrusion to determine the aperture size. Summary of the invention

[0005] The object of the present invention is to provide a method for detecting the hole position of a gearbox housing die casting to solve the problem raised in the background technology.

[0006] To achieve the above purpose, the present invention provides the following technical solutions

[0007] A hole position detection device for a gearbox housing die casting, comprising a mounting frame, an electric push rod is fixedly connected to the bottom of the mounting frame, a support box is fixedly connected to the bottom of the electric push rod, a pressurizing mechanism is provided at the bottom of the support box, a grinding mechanism is provided on the inner wall of the support box, an expansion mechanism is provided at one end of the pressurizing mechanism away from the support box, horizontal magnetic blocks are fixedly connected to the left and right inner walls of the support box, and a longitudinal magnetic block is fixedly connected to the bottom of the grinding mechanism;

[0008] The pressurizing mechanism comprises a push rod, the outer wall of which is sleeved with a compression spring, the top of which is fixedly connected with a connecting plate, the left and right sides of the connecting plate are provided with sliding grooves, and the outer wall of the push rod is slidably connected with a hydraulic pipe.

[0009] Furthermore, the grinding mechanism includes a hydraulic push rod, the bottom of the hydraulic push rod is fixedly connected to a push frame, the inner wall of the push frame is provided with a cylindrical groove, the bottom of the push frame is fixedly connected to a pushing ladder block, the outer wall of the pushing ladder block is slidably connected to a pressure ladder block, pulleys are provided on both sides of the pressure ladder block, the outer wall of the pulley is slidably connected to a sliding track, the bottom of the push frame and the side opposite to the pushing ladder block are fixedly connected with a protrusion, and the bottom of the pressure ladder block is fixedly connected to a grinding plate.

[0010] Furthermore, the expansion mechanism includes an entry block, the top of the entry block is rotatably connected to a rotating shaft, the outer wall of the rotating shaft is fixedly connected to a clamping plate, the outer wall of the rotating shaft is fixedly connected to a torque spring, the top of the entry block is fixedly connected to a connecting rod, the outer wall of the connecting rod is fixedly connected to a contact switch, the top of the contact switch is fixedly connected to a circular plate, and the outer wall of the entry block is fixedly connected to a metal sheet.

[0011] Furthermore, the outer wall of the connecting plate is fixedly connected to the supporting box, the connecting plate is in a circular ring shape, the push rod passes through the connecting plate, and the top of the hydraulic pipe is fixedly connected to the supporting box.

[0012] Furthermore, the top of the hydraulic push rod is fixedly connected to the support box, the push frame is convex-shaped, the horizontal cross-sectional area of ​​the cylindrical groove is adapted to the connecting plate, the outer wall of the compressed ladder block is slidably connected to the slide groove, and the outer wall of the sliding track is fixedly connected to the support box.

[0013] Furthermore, the sliding track is L-shaped, the inclined surface of the pushing ladder block and the inclined surface of the pressure ladder block are parallel to each other, the pressure ladder block and the horizontal magnetic block are located on the same horizontal line, the top of the pressure ladder block and the longitudinal magnetic block are located on the same vertical line, the pressure ladder block is made of iron, the outer wall of the sliding track is fixedly connected to the support box, the bottom height of the protrusion is lower than the bottom height of the longitudinal magnetic block, and the curvature of the grinding sheet is adapted to the connecting plate.

[0014] Furthermore, the inner wall of the entry block is fixedly connected to the torque spring, the entry block is composed of a hemisphere and a cylinder, the surface of the cylindrical position of the entry block is rough, and the hemisphere position is smooth, the two clamping plates are provided, and are symmetrical about the axis of the entry block, and the two clamping plates form a cylinder.

[0015] Furthermore, the curvature of the closing plate is adapted to the sliding track, the contact switch is electrically connected to a warning device, the outer wall of the closing plate is movably connected to the contact switch, and the top of the circular plate is fixedly connected to the push rod.

[0016] A method for detecting the hole position of a gearbox housing die casting, the specific steps are as follows:

[0017] S1: First, the detection equipment is powered on to extend the electric push rod, which pushes the support box downward, and the support box uses the connecting plate to drive the compression spring downward, and then the compression spring drives the circular plate downward, and the circular plate moves the entry block downward to dock with the die-casting hole. Since the entry block is composed of a hemisphere and a cylinder, the entry block uses its spherical curvature to facilitate insertion into the hole;

[0018] S2: Then, when the entry block moves downward, the clamping plate is limited by the hole area and rotates in the direction of the connecting rod. The clamping plate uses the rotating shaft to compress the torque spring. When the entry block completely enters the hole and the clamping plate rotates, the contact switch starts to work. When the clamping plate has no contact with the contact switch, the alarm sounds. At this time, it can be judged that the hole diameter is too large and the die-casting cannot be used normally, so the hole diameter extrusion is used to judge the hole diameter size and issue an alarm.

[0019] S3: Then, when the hole position of the die casting is offset, the entry block cannot be inserted into the hole position. When the entry block is inserted into the hole position, but the entry block does not completely enter the hole position, it means that the hemisphere enters the hole, indicating that the hole position is accurate, but because the burr inside the hole position contacts the metal sheet, the friction force is too large, so that the entry block is resisted, and the elastic force of the compression spring is not enough to make the entry block continue to move downward, and the entry block makes the connecting rod and the circular plate move upward relative to the support box;

[0020] S4: Finally, the circular plate compresses the compression spring and makes the push rod move upward. The connecting plate is used to control the moving direction of the push rod. The push rod is pressed into the inside of the hydraulic pipe. The hydraulic pressure inside the hydraulic pipe is under pressure, so that the hydraulic push rod is pushed downward. The hydraulic push rod pushes the push frame downward, and the push frame drives the ladder block to move downward. The ladder block is pushed so that the compressed ladder block moves toward the direction of the connecting plate. Then the compressed ladder block contacts the connecting plate, and the compressed ladder block is pushed by the protrusion at the bottom of the push frame. The protrusion pushes the compressed ladder block downward. The sliding track and the pulley cooperate to make the compressed ladder block move smoothly, and the compressed ladder block moves downward along the outer wall of the entry hole block;

[0021] S5: The compressed ladder block drives the grinding sheet to move downward, and the grinding sheet makes the circular plate fit the connecting rod. The grinding sheet contacts the metal sheet to make it fit the outer wall of the hole block, and then the grinding sheet grinds the inner wall of the hole. When the electric push rod retreats, the compressed ladder block is attracted by the longitudinal magnetic block to reset upward, and the compressed ladder block is attracted by the horizontal magnetic block to reset horizontally. The friction force is used to judge the internal roughness of the hole, and the resistance is used to increase the hydraulic pressure for processing.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The hole position detection method of the gearbox housing die-casting is that the detection equipment is energized to extend the electric push rod, and the electric push rod pushes the support box to move downward, and the support box uses the connecting plate to drive the compression spring downward, and then the compression spring drives the circular plate to move downward, and the circular plate moves the entry block downward to be inserted into the hole, and the clamping plate is limited by the hole area and rotates in the direction of the connecting rod. The clamping plate uses the rotating shaft to compress the torque spring. When the entry block completely enters the hole and the clamping plate rotates, the contact switch starts to work. When the clamping plate has no contact with the contact switch, the alarm sounds an alarm. At this time, it can be judged that the hole diameter is too large and the die-casting cannot be used normally, so the aperture extrusion is used to judge the aperture size to produce an alarm effect.

[0024] 2. The hole position detection method of the gearbox housing die casting is to insert the hole position through the hole entry block, but the hole entry block does not completely enter the hole position, which means that the hemisphere enters the hole, indicating that the hole position is accurate, but due to the contact between the burrs inside the hole position and the excessive friction, the hole entry block is blocked, and the hole entry block causes the connecting rod and the round plate to move upward, the round plate compresses the compression spring and causes the push rod to move upward, the push rod is pressed into the inside of the hydraulic pipe, and the hydraulic oil inside the hydraulic pipe is pressurized, so that the hydraulic push rod is pushed downward, and the hydraulic push rod pushes the push frame downward. The push frame drives the ladder block to move downward, and the ladder block makes the compressed ladder block move toward the connecting plate. Then the compressed ladder block contacts the connecting plate, and the compressed ladder block is pushed by the protrusion at the bottom of the push frame. The protrusion pushes the compressed ladder block downward, and the compressed ladder block moves downward along the outer wall of the entry hole block. Finally, the compressed ladder block drives the grinding sheet to move downward, and the grinding sheet contacts and fits the outer wall of the entry hole block, and then the grinding sheet grinds the inner wall of the hole, thereby realizing the effect of using friction to judge the internal roughness of the hole and using resistance to increase hydraulic pressure for grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the mounting frame structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the support box structure of the present invention;

[0027] Figure 3 It is a schematic diagram of the push rod structure of the present invention;

[0028] Figure 4 It is a schematic diagram of the front view of the electric push rod structure of the present invention;

[0029] Figure 5 It is a top view schematic diagram of the push rod structure of the present invention;

[0030] Figure 6 for Figure 4 A partial enlarged schematic diagram of the short position is a schematic diagram of the structure of the present invention.

[0031] In the figure: 1. mounting frame; 2. electric push rod; 3. supporting box; 4. pressurizing mechanism; 401. push rod; 402. compression spring; 403. connecting plate; 404. slide groove; 405. hydraulic pipe; 5. grinding mechanism; 501. hydraulic push rod; 502. push frame; 503. cylindrical groove; 504. pushing ladder block; 505. pressure ladder block; 506. pulley; 507. sliding track; 508. bump; 509. grinding sheet; 6. expansion mechanism; 601. entry block; 602. rotating shaft; 603. torque spring; 604. clamping plate; 605. contact switch; 606. round plate; 607. connecting rod; metal sheet 608, tough sheet; 7. horizontal magnetic block; 8. longitudinal magnetic block. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] See also Figure 1-6 A hole position detection device for a gearbox housing die-casting comprises a mounting frame 1, an electric push rod 2 is fixedly connected to the bottom of the mounting frame 1, a support box 3 is fixedly connected to the bottom of the electric push rod 2, a pressurizing mechanism 4 is arranged at the bottom of the support box 3, the pressurizing mechanism 4 comprises a push rod 401, a compression spring 402 is sleeved on the outer wall of the push rod 401, a connecting plate 403 is fixedly connected to the top of the compression spring 402, the outer wall of the connecting plate 403 is fixedly connected to the support box 3, the connecting plate 403 is annular, the push rod 401 passes through the connecting plate 403, and slide grooves 404 are provided on the left and right sides of the connecting plate 403, a hydraulic pipe 405 is slidably connected to the outer wall of the push rod 401, and the top of the hydraulic pipe 405 is fixedly connected to the support box 3.

[0034] The inner wall of the support box 3 is provided with a grinding mechanism 5, and the grinding mechanism 5 includes a hydraulic push rod 501, the top of the hydraulic push rod 501 is fixedly connected to the support box 3, and the bottom of the hydraulic push rod 501 is fixedly connected to a push frame 502, and the push frame 502 is in a convex shape. A cylindrical groove 503 is opened on the inner wall of the push frame 502, and the horizontal cross-sectional area of ​​the cylindrical groove 503 is adapted to the connecting plate 403. A pushing ladder block 504 is fixedly connected to the bottom of the push frame 502, and the outer wall of the pushing ladder block 504 is slidably connected to a pressure ladder block 505, and the outer wall of the pressure ladder block 505 is slidably connected to the slide groove 404.

[0035] Pulleys 506 are provided on both sides of the compressed ladder block 505. The outer wall of the pulley 506 is slidably connected to a sliding track 507. The sliding track 507 is L-shaped. The inclined surface of the pushing ladder block 504 and the inclined surface of the compressed ladder block 505 are parallel to each other. The compressed ladder block 505 is made of iron. The outer wall of the sliding track 507 is fixedly connected to the support box 3. A protrusion 508 is fixedly connected to the bottom of the pushing frame 502 and on the side opposite to the pushing ladder block 504.

[0036] A grinding sheet 509 is fixedly connected to the bottom of the pressure ladder block 505, and the curvature of the grinding sheet 509 is adapted to the connecting plate 403. An expansion mechanism 6 is provided at the end of the pressure mechanism 4 away from the support box 3. The expansion mechanism 6 includes an entry block 601. The top of the entry block 601 is rotatably connected to a rotating shaft 602. The outer wall of the rotating shaft 602 is fixedly connected to a clamping plate 604. The curvature of the clamping plate 604 is adapted to the sliding track 507. Two clamping plates 604 are provided and are symmetrical about the axis of the entry block 601. The two clamping plates 604 form a cylinder. The outer wall of the rotating shaft 602 is fixedly connected to a torque spring 603.

[0037] The inner wall of the hole entry block 601 is fixedly connected to the torque spring 603. The hole entry block 601 is composed of a hemisphere and a cylinder. The surface of the cylinder of the hole entry block 601 is rough, and the surface of the hemisphere is smooth. The top of the hole entry block 601 is fixedly connected to a connecting rod 607. The outer wall of the connecting rod 607 is fixedly connected to a contact switch 605. The top of the contact switch 605 is fixedly connected to a circular plate 606. The electrical connection of the contact switch 605 is an alarm. The outer wall of the closing plate 604 is movably connected to the contact switch 605. The circular plate 606 is fixedly connected to the outer wall of the closing plate 604. 6 is fixedly connected to the push rod 401, the outer wall of the entry block 601 is fixedly connected to the metal sheet 608, the left and right inner walls of the support box 3 are fixedly connected to the horizontal magnetic block 7, the pressure ladder block 505 and the horizontal magnetic block 7 are located on the same horizontal line, the bottom of the grinding mechanism 5 is fixedly connected to the longitudinal magnetic block 8, the bottom height of the protrusion 508 is lower than the bottom height of the longitudinal magnetic block 8, the bottom of the push frame 502 is fixedly connected to the longitudinal magnetic block 8, and the top of the pressure ladder block 505 and the longitudinal magnetic block 8 are located on the same vertical line.

[0038] A method for detecting the hole position of a gearbox housing die casting, the specific steps are as follows:

[0039] S1: First, the detection device is powered on to extend the electric push rod 2, which pushes the support box 3 to move downward, and the support box 3 uses the connecting plate 403 to drive the compression spring 402 downward, and then the compression spring 402 drives the circular plate 606 to move downward, and the circular plate 606 makes the entry block 601 move downward to dock with the hole position of the die casting. Since the entry block 601 is composed of a hemisphere and a cylinder, the entry block 601 uses its spherical curvature to facilitate insertion into the hole;

[0040] S2: Then, when the hole entry block 601 moves downward, the clamping plate 604 is limited by the hole area and rotates in the direction of the connecting rod 607. The clamping plate 604 uses the rotating shaft 602 to compress the torque spring 603. When the hole entry block 601 completely enters the hole and the clamping plate 604 rotates, the contact switch 605 starts to work. When the clamping plate 604 is not in contact with the contact switch 605, the alarm sounds an alarm. At this time, it can be judged that the aperture is too large and the die-casting cannot be used normally, so the aperture size is judged by aperture extrusion to issue an alarm.

[0041] S3: Then, when the hole position of the die casting is offset, the hole entry block 601 cannot be inserted into the hole position. When the hole entry block 601 is inserted into the hole position, but the hole entry block 601 does not completely enter the hole position, it means that the hemisphere enters the hole, indicating that the hole position is accurate, but because the burr inside the hole position contacts the metal sheet 608, the friction force is too large, so that the hole entry block 601 is resisted, and the elastic force of the compression spring 402 is not enough to make the hole entry block 601 continue to move downward, and the hole entry block 601 makes the connecting rod 607 and the circular plate 606 move upward relative to the support box 3;

[0042] S4: Finally, the circular plate 606 compresses the compression spring 402 and makes the push rod 401 move upward. The connecting plate 403 is used to control the moving direction of the push rod 401. The push rod 401 is pressed into the interior of the hydraulic pipe 405. The hydraulic pressure inside the hydraulic pipe 405 is under pressure, so that the hydraulic push rod 501 is pushed downward. The hydraulic push rod 501 pushes the push frame 502 downward. The push frame 502 drives the ladder block 504 to move downward, pushing the ladder block 504 to make the compressed ladder block 505 move toward the direction of the connecting plate 403. Then the compressed ladder block 505 contacts the connecting plate 403, and the compressed ladder block 505 is pushed by the protrusion 508 at the bottom of the push frame 502. The protrusion 508 pushes the compressed ladder block 505 downward. The sliding track 507 and the pulley 506 cooperate to make the compressed ladder block 505 move smoothly. The compressed ladder block 505 moves downward along the outer wall of the entry hole block 601;

[0043] S5: The compressed ladder block 505 drives the grinding sheet 509 to move downward, and the grinding sheet 509 makes the circular plate 606 fit the connecting rod 607. The grinding sheet 509 contacts the metal sheet 608 to make it fit the outer wall of the hole block 601, and then the grinding sheet 509 grinds the inner wall of the hole. When the electric push rod 2 retreats, the compressed ladder block 505 is attracted by the longitudinal magnetic block 8 to reset upward, and the compressed ladder block 505 is attracted by the horizontal magnetic block 7 to reset horizontally. The friction force is used to judge the internal roughness of the hole, and the resistance is used to increase the hydraulic pressure for processing.

[0044] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hole position detection device for a gearbox housing die casting, comprising a mounting frame (1), characterized in that: The bottom of the mounting frame (1) is fixedly connected to an electric push rod (2), the bottom of the electric push rod (2) is fixedly connected to a support box (3), the bottom of the support box (3) is provided with a pressurizing mechanism (4), the inner wall of the support box (3) is provided with a grinding mechanism (5), an expansion mechanism (6) is provided at one end of the pressurizing mechanism (4) away from the support box (3), the left and right inner walls of the support box (3) are both fixedly connected to horizontal magnetic blocks (7), and the bottom of the grinding mechanism (5) is fixedly connected to a longitudinal magnetic block (8); The pressurizing mechanism (4) comprises a push rod (401), the outer wall of the push rod (401) is sleeved with a compression spring (402), the top of the compression spring (402) is fixedly connected to a connecting plate (403), the left and right sides of the connecting plate (403) are provided with sliding grooves (404), and the outer wall of the push rod (401) is slidably connected to a hydraulic pipe (405); The grinding mechanism (5) comprises a hydraulic push rod (501), the bottom of the hydraulic push rod (501) is fixedly connected to a push frame (502), the inner wall of the push frame (502) is provided with a cylindrical groove (503), the bottom of the push frame (502) is fixedly connected to a push ladder block (504), the outer wall of the push ladder block (504) is slidably connected to a pressure ladder block (505), the front and back sides of the pressure ladder block (505) are provided with pulleys (506), the outer wall of the pulley (506) is slidably connected to a sliding track (507), the bottom of the push frame (502) and the side opposite to the push ladder block (504) are fixedly connected to a protrusion (508), and the bottom of the pressure ladder block (505) is fixedly connected to a grinding sheet (509); The expansion mechanism (6) comprises an entry hole block (601), the top of the entry hole block (601) is rotatably connected to a rotating shaft (602), the outer wall of the rotating shaft (602) is fixedly connected to a clamping plate (604), the outer wall of the rotating shaft (602) is fixedly connected to a torque spring (603), the top of the entry hole block (601) is fixedly connected to a connecting rod (607), the outer wall of the connecting rod (607) is fixedly connected to a contact switch (605), the top of the contact switch (605) is fixedly connected to a circular plate (606), and the outer wall of the entry hole block (601) is fixedly connected to a metal sheet (608); The contact switch (605) is electrically connected to a warning device, the outer wall of the closing plate (604) is movably connected to the contact switch (605), the top of the circular plate (606) is fixedly connected to the push rod (401), and the metal sheet (608) is a metal sheet.

2. The hole position detection device for a gearbox housing die casting according to claim 1, characterized in that: The outer wall of the connecting plate (403) is fixedly connected to the support box (3), and the top of the hydraulic pipe (405) is fixedly connected to the support box (3).

3. The hole position detection device for a gearbox housing die casting according to claim 1, characterized in that: The top of the hydraulic push rod (501) is fixedly connected to the support box (3), the bottom of the push frame (502) is fixedly connected to the longitudinal magnetic block (8), the push frame (502) is convex, the outer wall of the pressure ladder block (505) is slidably connected to the slide groove (404), and the outer wall of the sliding track (507) is fixedly connected to the support box (3).

4. The hole position detection device for a gearbox housing die casting according to claim 1, characterized in that: The sliding track (507) is L-shaped, the inclined surface of the pushing ladder block (504) and the inclined surface of the pressure ladder block (505) are parallel to each other, the pressure ladder block (505) is made of iron, and the outer wall of the sliding track (507) is fixedly connected to the support box (3).

5. The hole position detection device for a gearbox housing die casting according to claim 1, characterized in that: The inner wall of the entry block (601) is fixedly connected to the torque spring (603); the entry block (601) is composed of a hemisphere and a cylinder; two clamping plates (604) are provided and are symmetrical about the axis of the entry block (601); and the two clamping plates (604) form a cylinder.

6. A method for detecting hole positions of a gearbox housing die casting according to claim 1, comprising the following specific steps: S1: First, the detection device is powered on to extend the electric push rod (2), and the electric push rod (2) pushes the support box (3) to move downward, and the support box (3) drives the compression spring (402) downward by using the connecting plate (403), and then the compression spring (402) drives the circular plate (606) to move downward, and the circular plate (606) causes the entry block (601) to move downward and dock with the hole position of the die casting. Since the entry block (601) is composed of a hemisphere and a cylinder, the entry block (601) can be inserted into the hole by using its spherical curvature; S2: Then, when the hole entry block (601) moves downward, the clamping plate (604) is limited by the hole area and rotates in the direction of the connecting rod (607). The clamping plate (604) compresses the torque spring (603) by the rotating shaft (602). When the hole entry block (601) completely enters the hole and the clamping plate (604) rotates, the contact switch (605) starts to work. When the clamping plate (604) and the contact switch (605) are not in contact, the alarm sounds an alarm. At this time, it can be judged that the hole diameter is too large and the die casting cannot be used normally, so the hole diameter is judged by the hole diameter extrusion to sound an alarm; S3: Subsequently, when the entry block (601) is inserted into the hole, but the entry block (601) does not completely enter the hole, it means that the hemisphere enters the hole, indicating that the hole position is accurate, but because the burrs inside the hole contact the metal sheet (608), the friction force is too large, so that the entry block (601) is resisted, and the elastic force of the compression spring (402) is insufficient to make the entry block (601) continue to move downward, and the entry block (601) makes the connecting rod (607) and the circular plate (606) move upward relative to the support box (3); S4: The compression spring (402) is compressed by the circular plate (606) to move the push rod (401) upward. The connecting plate (403) is used to control the moving direction of the push rod (401). The push rod (401) is pressed into the interior of the hydraulic pipe (405). The hydraulic oil in the hydraulic pipe (405) is pressurized so that the hydraulic push rod (501) is pushed downward. The hydraulic push rod (501) pushes the push frame (502) downward. The push frame (502) drives the ladder block (504) to move downward, pushing the ladder block ( 504) causes the compressed ladder block (505) to move toward the connecting plate (403), and then the compressed ladder block (505) contacts the connecting plate (403), and the compressed ladder block (505) is pushed by the protrusion (508) at the bottom of the push frame (502), and the protrusion (508) pushes the compressed ladder block (505) downward, and the sliding track (507) and the pulley (506) cooperate to make the compressed ladder block (505) move smoothly, and the compressed ladder block (505) moves downward along the outer wall of the entry hole block (601); S5: Finally, the compressed ladder block (505) drives the grinding sheet (509) to move downward, and the grinding sheet (509) makes the circular plate (606) fit the connecting rod (607). The grinding sheet (509) contacts the metal sheet (608) to fit the outer wall of the hole block (601). Then, the grinding sheet (509) grinds the inner wall of the hole. When the electric push rod (2) retracts, the compressed ladder block (505) is attracted by the longitudinal magnetic block (8) to reset upward, and the compressed ladder block (505) is attracted by the horizontal magnetic block (7) to reset horizontally. The friction force is used to judge the internal roughness of the hole, and the resistance is used to increase the hydraulic pressure for processing.

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