Quality inspection device for metal parts

Abstract

The utility model discloses a quality inspection device for metal parts, which comprises a workbench, the top of the workbench is fixedly connected with a U-shaped support, the top of the U-shaped support is fixedly provided with a PLC (programmable logic controller), and the top of the PLC is fixedly and electrically connected with an audible and visual alarm. According to the utility model, a series of structures are arranged, so that a metal part can be conveniently and automatically clamped from four sides in a pressure control manner, the clamping force on the metal part can be automatically and accurately controlled, and the phenomena that the metal part sinks and deforms from the peripheral side due to overlarge clamping force and the pressure-bearing detection work is influenced are avoided; the device is simple in structure, convenient and suitable for precise clamping work of metal parts made of different materials, convenient for pressure control and bearing detection of the metal parts, and capable of timely and automatically giving an alarm to remind personnel when slight deformation occurs in the detection process, so that the phenomenon that the personnel are difficult to clearly know the slight deformation is avoided, and the detection precision is improved.

Description

Technical Field

[0001] This utility model relates to the field of metal parts technology, specifically to a quality inspection device for metal parts. Background Technology

[0002] Metal parts refer to a collective term for metal blocks, rods, tubes, etc., of various sizes and shapes manufactured from metal materials. After the production and processing of metal parts, pressure testing is required. According to a novelty search report, announcement number CN217765909U discloses a quality inspection device for metal parts, including a bracket and a clamping component for fixing the workpiece. The clamping component includes two sliding grooves on one side of the bracket, a support frame on the top of the bracket, a bidirectional screw on one side of the sliding grooves, and a [missing information - likely a component or part]. The device consists of two sliding blocks located on the outside of a bidirectional screw, a motor at one end of the bidirectional screw, a fixed plate on one side of the sliding blocks, a clamping block on one side of the fixed plate, and fixed slots on both sides of the clamping block. By setting up a bracket, sliding blocks, a fixed plate, clamping blocks, a limit ring, a fixed ring, and a fixed frame, the two sliding blocks drive the clamping block on the fixed plate to move closer or further apart. This solves the problem that existing equipment cannot fix workpieces of different sizes, which easily leads to workpiece displacement or shaking, affecting the practicality of the equipment for pressure testing of workpieces.

[0003] The aforementioned technology discloses a quality inspection device for metal parts, which clamps the metal parts from both sides using two clamping blocks that can move in close proximity, and performs pressure testing using a structure such as a cylinder and a pressing block. However, it still has the following shortcomings in use:

[0004] 1. The clamping force on metal parts cannot be automatically and accurately controlled, which can easily lead to deformation due to excessive clamping force, affecting the pressure testing work at the top; 2. When deformation occurs to the circumference during pressure testing, the device cannot automatically alarm and remind personnel in a timely manner, and it is inconvenient for personnel to clearly notice slight outward deformation, resulting in unsatisfactory testing accuracy; In view of this, this application proposes a quality inspection device for metal parts to solve the above-mentioned problems. Utility Model Content

[0005] The purpose of this invention is to provide a quality inspection device for metal parts to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a quality inspection device for metal parts, comprising a workbench, a U-shaped bracket fixedly connected to the top of the workbench, a PLC controller fixedly mounted on the top of the U-shaped bracket, an audible and visual alarm fixedly and electrically connected to the top of the PLC controller, and a pressure-controlling and pressing component electrically connected to the PLC controller and used for pressing the metal parts on the inner wall of the top of the U-shaped bracket; the pressure-controlling and pressing component is used to control the downward pressing of the metal parts under the control of the PLC controller.

[0007] The workbench has rectangular holes on all four sides of its top, and rectangular slots between these holes on its bottom. Threaded transverse drive assemblies are installed between the inner walls of the rectangular holes. The ends of the four threaded transverse drive assemblies extend into the rectangular slots and are fixedly connected to a co-drive assembly for synchronous rotary drive. A servo motor for driving the co-drive assembly is fixedly installed at the bottom of the workbench. The servo motor is electrically connected to a PLC controller. First pressure sensors, electrically connected to the PLC controller, are fixedly connected to the top of the four threaded transverse drive assemblies on their adjacent sides. Adjustable clamping assemblies for clamping metal parts of different sizes are fixedly connected to the sides of the four first pressure sensors on their adjacent sides. The co-drive assembly synchronously drives the four threaded transverse drive assemblies when the servo motor starts. The components rotate, and four threaded horizontal drive components drive four first pressure sensors to retract inward or expand outward during rotation. Four adjustable clamping components clamp the metal parts when the four first pressure sensors retract inward. The first pressure sensors also monitor the clamping pressure in real time and transmit the pressure value to the PLC controller. When the preset pressure value is reached, the PLC controller controls the servo motor to automatically shut down, realizing controlled pressure clamping from four sources. In addition, the first pressure sensors also detect the clamping pressure when the metal parts are squeezed and deformed to the circumference and transmit the pressure value to the PLC controller. When the pressure value exceeds the preset clamping pressure value, it is judged that a deformation has occurred, and the PLC controller controls the sound and light alarm to activate for alarm reminder.

[0008] Preferably, the pressure control and pressing assembly includes an electric push rod embedded and fixed on the inner wall of the top of the U-shaped bracket. The extended end of the electric push rod is fixedly connected to a second pressure sensor. The bottom of the second pressure sensor is fixedly connected to a pressure block for pressing the top of the metal parts. Both the electric push rod and the second pressure sensor are electrically connected to the PLC controller.

[0009] Preferably, the threaded transverse drive assembly includes two transverse guide shafts fixedly connected between the inner walls of the two sides of the corresponding rectangular hole. A screw is rotatably installed between the inner walls of the two sides of the rectangular hole. A movable seat is threaded on the screw. The movable seat is slidably sleeved on the two corresponding transverse guide shafts. The ends of the four screws that are close to each other extend into the rectangular groove. The tops of the four movable seats that are close to each other are fixedly connected to the corresponding first pressure sensor.

[0010] Preferably, the drive assembly includes a first bevel gear fixedly connected to the top of the output shaft of the servo motor. The first bevel gear has a second bevel gear meshing on all four sides. Two opposing second bevel gears are symmetrically arranged, and the opposing sides of the four second bevel gears are fixedly connected to the ends of the four screws that are close to each other.

[0011] Preferably, the adjustable pressure assembly includes horizontal guide rods, with the opposing sides of the four horizontal guide rods respectively fixedly connected to the sides of the four first pressure sensors. T-shaped clamps are slidably sleeved on the horizontal guide rods, and anti-slip rubber is glued and fixed to the adjacent sides of the four T-shaped clamps. A locking bolt is squeezed and contacted at the top of the horizontal guide rod, and the T-shaped clamps are threaded onto the corresponding locking bolts. A scale line is provided on one side of the horizontal guide rod to cooperate with the side of the corresponding T-shaped clamp.

[0012] Preferably, the workbench is fixedly connected to four corners at its bottom, and the movable seat has a threaded hole on one side that is threaded to the corresponding screw.

[0013] Preferably, the T-shaped clamp has a rectangular guide groove on the side near the corresponding movable seat, the rectangular guide groove is slidably sleeved on the corresponding horizontal guide rod, and a threaded through hole is formed on the top inner wall of the rectangular guide groove for threaded connection with the corresponding locking bolt.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. Through the coordinated operation of the PLC controller, worktable, servo motor, drive assembly, threaded horizontal drive assembly, first pressure sensor, and adjustable clamping assembly, the device can automatically clamp metal parts from four sides. This automatic clamping method precisely controls the clamping force on metal parts, preventing excessive clamping force from squeezing them from the periphery and causing inward deformation. This avoids affecting the pressure testing work at the top and facilitates precise clamping of metal parts made of different materials. Furthermore, the device allows for flexible and individual adjustment of the lateral position of the T-shaped clamping blocks according to the width of the metal parts, enabling simultaneous clamping from four sides for metal parts of different widths after adjustment, thus improving applicability.

[0016] 2. By combining the first pressure sensor, adjustable pressure-fixing component, pressure-controlled pressing component, and audible and visual alarm, pressure-controlled pressure testing of metal parts can be performed. It can also automatically alarm and remind personnel in a timely manner when slight outward deformation of metal parts occurs during the testing process, avoiding the phenomenon that personnel cannot clearly notice slight deformation and improving the accuracy of testing.

[0017] This utility model, through a series of structures, facilitates automatic pressure clamping of metal parts from all four sides. It can automatically and accurately control the clamping force on metal parts, avoiding the phenomenon of metal parts deforming from the periphery due to excessive clamping force and affecting the pressure test. It is convenient for precise clamping of metal parts of different materials, and facilitates pressure control and pressure test of metal parts. It also automatically alarms and reminds personnel in time when slight deformation occurs during the test, avoiding the phenomenon that personnel cannot clearly notice slight deformation, thus improving the accuracy of the test. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a quality inspection device for metal parts proposed in this utility model.

[0019] Figure 2 for Figure 1 A schematic diagram of the cross-sectional structure;

[0020] Figure 3 This is a top view of the workbench and adjustable clamping assembly of a quality inspection device for metal parts proposed in this utility model.

[0021] In the diagram: 1. Workbench; 101. Rectangular hole; 102. Rectangular groove; 2. U-shaped bracket; 3. PLC controller; 301. Audible and visual alarm; 4. Electric push rod; 401. Second pressure sensor; 402. Pressure block; 5. Horizontal guide shaft; 501. Screw; 502. Moving seat; 503. Second bevel gear; 504. First bevel gear; 6. Servo motor; 7. First pressure sensor; 8. Horizontal guide rod; 801. T-shaped clamp; 802. Anti-slip rubber; 803. Locking bolt. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figures 1 to 3As shown in the figure, the quality inspection device for metal parts proposed in this embodiment includes a workbench 1, with support legs fixedly connected to the four corners of the bottom of the workbench 1, a U-shaped bracket 2 fixedly connected to the top of the workbench 1, a PLC controller 3 fixedly mounted on the top of the U-shaped bracket 2, an audible and visual alarm 301 fixedly and electrically connected to the top of the PLC controller 3, and a pressure control and pressing component, which is electrically connected to the PLC controller 3 and used for pressing the metal parts, is embedded and fixed on the inner wall of the top of the U-shaped bracket 2; the pressure control and pressing component is used to control the downward pressing of the metal parts by the PLC controller 3.

[0024] The top of the workbench 1 has rectangular holes 101 on all four sides. The bottom of the workbench 1 has rectangular grooves 102 located between the four rectangular holes 101. Threaded transverse drive assemblies are installed between the inner walls of the two sides of the rectangular holes 101. The ends of the four threaded transverse drive assemblies extend into the rectangular grooves 102 and are fixedly connected to a co-drive assembly for synchronous rotary drive. A servo motor 6 for driving the co-drive assembly is fixedly installed at the bottom of the workbench 1. The servo motor 6 is electrically connected to the PLC controller 3. A first pressure sensor 7, electrically connected to the PLC controller 3, is fixedly connected to the top of the four threaded transverse drive assemblies on the adjacent side. An adjustable clamping assembly for clamping metal parts of different sizes is fixedly connected to the adjacent side of the four first pressure sensors 7. The co-drive assembly is used for synchronous drive when the servo motor 6 starts. Four threaded horizontal drive assemblies rotate, driving four first pressure sensors 7 to retract inwards or expand outwards in opposite directions during rotation. Four adjustable clamping assemblies clamp the metal parts when the four first pressure sensors 7 retract inwards. The first pressure sensors 7 also monitor the clamping pressure in real time and transmit the pressure value to the PLC controller 3. When the preset pressure value is reached, the PLC controller 3 controls the servo motor 6 to automatically shut down, realizing controlled pressure clamping from four sources. In addition, the first pressure sensors 7 also detect the clamping pressure when the metal parts are squeezed and deformed to the circumference and transmit the pressure value to the PLC controller 3. When the pressure value exceeds the preset clamping pressure value, it is determined that a deformation has occurred, and the PLC controller 3 controls the audible and visual alarm 301 to activate for alarm reminder.

[0025] Specifically, the pressure-controlled pressing assembly includes an electric push rod 4 embedded and fixed on the inner wall of the top of the U-shaped bracket 2. A second pressure sensor 401 is fixedly connected to the extended end of the electric push rod 4. A pressure block 402 for pressing the top of the metal parts is fixedly connected to the bottom of the second pressure sensor 401. Both the electric push rod 4 and the second pressure sensor 401 are electrically connected to the PLC controller 3. The electric push rod 4, the second pressure sensor 401 and the pressure block 402 work together to drive the pressure block 402 downward through the second pressure sensor 401 to press down the metal parts. The second pressure sensor 401 detects the pressing force applied by the electric push rod 4 during pressing and transmits the pressure value to the PLC controller 3. When the preset quality inspection pressure value is reached, the PLC controller 3 controls the electric push rod 4 to close, thereby realizing the pressure-controlled pressing inspection of the metal parts.

[0026] Furthermore, the threaded transverse drive assembly includes two transverse guide shafts 5 fixedly connected between the inner walls of the corresponding rectangular hole 101 on both sides. A screw 501 is rotatably mounted between the inner walls of the two sides of the rectangular hole 101. A circular through hole is formed on the inner wall of the rectangular hole 101 near the rectangular groove 102. Bearings are fixedly mounted in the circular through hole and on the side wall of the rectangular hole 101. The inner side of the inner ring of the bearing is fixedly connected to the outer side of the corresponding screw 501, which serves to rotatably mount the screw 501. A movable seat 502 is threadedly fitted on the screw 501. A threaded hole is formed on one side of the movable seat 502, which is threadedly connected to the corresponding screw 501. The threaded connection between the screw 501 and the threaded hole facilitates the transverse movement of the corresponding movable seat 502 when the screw 501 rotates. The seat 502 is slidably sleeved on the two corresponding transverse guide shafts 5. One side of the movable seat 502 has two transverse guide holes that are slidably sleeved on the outer side of the corresponding transverse guide shafts 5, which serve to guide the lateral sliding of the movable seat 502. The near ends of the four screws 501 extend into the rectangular groove 102. The top of the near side of the four movable seats 502 is fixedly connected to the corresponding first pressure sensor 7. The screws 501, transverse guide shafts 5 and movable seats 502 cooperate to drive the four movable seats 502 to move inward or outward in opposite directions when the four screws 501 rotate, and the two opposite screws 501 rotate in opposite directions. The rotation of the four screws 501 can drive the four first pressure sensors 7 to move inward or outward in opposite directions.

[0027] Furthermore, the drive assembly includes a first bevel gear 504 fixedly connected to the top of the output shaft of the servo motor 6. Second bevel gears 503 mesh with each of the four sides of the first bevel gear 504. Two opposing second bevel gears 503 are symmetrically arranged. The opposing sides of the four second bevel gears 503 are fixedly connected to the ends of the four screws 501. The servo motor 6, the first bevel gear 504, and the second bevel gears 503 work together. The servo motor 6 drives the first bevel gear 504 to rotate, which in turn drives the four meshing second bevel gears 503 to rotate. The four second bevel gears 503 drive the four screws 501 to rotate synchronously. Because the opposing second bevel gears 503 are symmetrically arranged, their rotation directions are opposite, thus causing the opposing screws 501 to rotate in opposite directions.

[0028] Furthermore, the adjustable clamping assembly includes horizontal guide rods 8. The opposing sides of the four horizontal guide rods 8 are respectively fixedly connected to the sides of the four first pressure sensors 7. T-shaped clamping blocks 801 are slidably sleeved on the horizontal guide rods 8. A rectangular guide groove is formed on the side of the T-shaped clamping block 801 near the corresponding moving seat 502. The rectangular guide groove is slidably sleeved on the corresponding horizontal guide rod 8. Anti-slip rubber 802 is glued and fixed to the adjacent sides of the four T-shaped clamping blocks 801. A locking bolt 803 is pressed tightly against the top of the horizontal guide rod 8. The T-shaped clamping blocks 801 are threaded onto the corresponding locking bolts 803. A threaded through hole is formed on the inner wall of the top of the rectangular guide groove, which is threadedly connected to the corresponding locking bolt 803. A scale line is provided on one side of the horizontal guide rod 8 to mate with the side of the corresponding T-shaped clamping block 801. The horizontal guide rods 8, scale lines, and locking bolts 803 are provided. The T-shaped clamps 801 and the anti-slip rubber 802 work together to clamp the metal parts in the middle when the four first pressure sensors 7 retract in close proximity. This is achieved by sequentially driving the four anti-slip rubber 802 towards the center through the four horizontal guide rods 8 and the four T-shaped clamps 801. Additionally, when the width of the metal parts differs in the front-to-back and left-to-right directions, a wrench can be used to loosen the locking bolts 803. Then, the corresponding T-shaped clamps 801 can be moved laterally. By observing the alignment of the T-shaped clamps 801 with the corresponding scale lines, the adjustment length can be determined. After proper adjustment, the locking bolts 803 are tightened with a wrench to press against the horizontal guide rods 8, thus locking the adjusted T-shaped clamps 801. The ability to individually adjust the position of the four T-shaped clamps 801 facilitates simultaneous pressure clamping of metal parts of different widths from all four sides after adjustment, improving applicability.

[0029] The usage method of this embodiment is as follows: During use, the metal parts to be tested are placed on the workbench 1, below the pressure block 402. Based on the pressure testing requirements, the PLC controller 3 is used to preset the pressure value for closing the electric push rod 4. Based on the clamping requirements of different metal parts, the PLC controller 3 is also used to preset the pressure value for closing the servo motor 6. Furthermore, the PLC controller 3 is used to preset the activation of the audible and visual alarm 301 when the clamping pressure value exceeds a preset value. At this time, the operator first starts the servo motor 6 in a forward direction to drive the first bevel gear 504 to rotate. The first bevel gear 504 drives the four second bevel gears 503 meshing with it to rotate. The four second bevel gears 503 drive the four screws 501 to rotate synchronously. Since the two opposite second bevel gears 503 are symmetrically arranged, their rotation directions are opposite, thus causing the two opposite screws 501 to rotate in opposite directions. When the four screws 501 rotate and the two opposite screws 501 rotate... In the opposite rotation state, when the four screws 501 rotate, they can drive the four moving seats 502 to move inward in close proximity. The moving seats 502 slide on the corresponding two horizontal guide shafts 5. The four moving seats 502 drive the four first pressure sensors 7 to move inward in close proximity. The four first pressure sensors 7 drive the four anti-slip rubber sheets 802 to clamp the metal parts in the middle through the four horizontal guide rods 8 and the four T-shaped clamps 801. The four first pressure sensors 7 detect the squeezing force applied by the corresponding moving seats 502 and transmit it to the PLC controller 3. When the preset value is reached, the PLC controller 3 controls the servo motor 6 to automatically shut down, realizing the effect of automatic pressure control and clamping of metal parts from four sides. By using the automatic pressure control and clamping method, the clamping force of the metal parts can be automatically and accurately controlled, avoiding the phenomenon of the metal parts being squeezed from the periphery and deformed due to excessive clamping force. This avoids affecting the pressure detection work at the top and is convenient for the precise clamping of metal parts of different materials.

[0030] During pressure testing, the electric push rod 4 is activated in the forward direction, causing it to drive the pressure block 402 downward via the second pressure sensor 401, thus pressing down on the metal parts. The second pressure sensor 401 detects the compressive force applied by the electric push rod 4 during pressing and transmits it to the PLC controller 3. When the preset quality inspection pressure value is reached, the PLC controller 3 controls the electric push rod 4 to close, realizing controlled pressure testing of the metal parts. During controlled pressure testing, when the metal parts deform outward due to compression, the deformed parts will press the corresponding T-shaped clamp 801 outward. The corresponding locking bolt 803 drives the horizontal guide rod 8 to increase the outward squeezing force on the first pressure sensor 7. Under the action of increased pressure, the clamping pressure value exceeds the preset value. The first pressure sensor 7 detects the pressure in real time and transmits the pressure value to the PLC controller 3. When the pressure value exceeds the preset clamping pressure value, it is judged that a deformation phenomenon has occurred. At this time, the PLC controller 3 controls the sound and light alarm 301 to start the alarm reminder. This achieves the effect of timely automatic alarm reminder to personnel when slight deformation of metal parts occurs during pressure testing, avoiding the phenomenon that personnel cannot clearly know when slight deformation occurs, and improving the accuracy of detection.

[0031] After the inspection is completed, the reverse-start servo motor 6 and the reverse-start electric push rod 4 are activated. The electric push rod 4 drives the pressure block 402 to rise through the second pressure sensor 401. The reverse-start servo motor 6 moves in the opposite direction to the forward-starting servo motor 6. At this time, the four T-shaped clamps 801 move outward and release the clamping state of the metal parts. The metal parts can then be removed and replaced with the next metal parts for quality inspection. In addition, when the width of the metal parts is different in the front and back and left and right, the personnel can use a wrench to loosen the locking bolt 803 and then move the corresponding T-shaped clamp 801 horizontally. By observing the alignment of the T-shaped clamp 801 with the corresponding scale line, the length to be adjusted can be judged. After the adjustment is appropriate, the locking bolt 803 is tightened with a wrench to press it against the horizontal guide rod 8, thereby locking the adjusted T-shaped clamp 801. The ability to adjust the position of the four T-shaped clamps 801 horizontally individually facilitates the simultaneous pressure clamping of metal parts of different widths from four sides after adjustment, improving applicability.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A quality inspection device for metal parts, comprising a workbench (1), characterized in that: The top of the workbench (1) is fixedly connected to a U-shaped bracket (2), and a PLC controller (3) is fixedly installed on the top of the U-shaped bracket (2). An audible and visual alarm (301) is fixedly connected to the top of the PLC controller (3). A pressure control and pressing component that is electrically connected to the PLC controller (3) and used to extrude metal parts is embedded and fixed on the inner wall of the top of the U-shaped bracket (2). The workbench (1) has rectangular holes (101) on all four sides of its top. The bottom of the workbench (1) has rectangular slots (102) between the four rectangular holes (101). Threaded transverse drive assemblies are installed between the inner walls of the two sides of the rectangular holes (101). The ends of the four threaded transverse drive assemblies that are close to each other extend into the rectangular slots (102) and are fixedly connected to a drive assembly for synchronous rotary drive. A servo motor (6) for driving the drive assembly to rotate is fixedly installed at the bottom of the workbench (1). The servo motor (6) is electrically connected to the PLC controller (3). The top of the four threaded transverse drive assemblies that are close to each other is fixedly connected to a first pressure sensor (7) that is electrically connected to the PLC controller (3). The sides of the four first pressure sensors (7) that are close to each other are fixedly connected to an adjustable clamping assembly for clamping metal parts of different sizes.

2. The quality inspection device for metal parts according to claim 1, characterized in that: The pressure control and pressing assembly includes an electric push rod (4) embedded and fixed on the inner wall of the top of the U-shaped bracket (2). The extended end of the electric push rod (4) is fixedly connected to a second pressure sensor (401). The bottom of the second pressure sensor (401) is fixedly connected to a pressure block (402) for pressing the top of the metal parts. The electric push rod (4) and the second pressure sensor (401) are both electrically connected to the PLC controller (3).

3. The quality inspection device for metal parts according to claim 1, characterized in that: The threaded transverse drive assembly includes two transverse guide shafts (5) fixedly connected between the inner walls of the corresponding rectangular hole (101) on both sides. A screw (501) is rotatably installed between the inner walls of the two sides of the rectangular hole (101). A movable seat (502) is threaded on the screw (501). The movable seat (502) is slidably sleeved on the corresponding two transverse guide shafts (5). The ends of the four screws (501) that are close to each other extend into the rectangular groove (102). The top of the sides of the four movable seats (502) that are close to each other are fixedly connected to the corresponding first pressure sensor (7).

4. The quality inspection device for metal parts according to claim 3, characterized in that: The drive assembly includes a first bevel gear (504) fixedly connected to the top of the output shaft of the servo motor (6). The first bevel gear (504) has a second bevel gear (503) meshing on all four sides. The two opposite second bevel gears (503) are symmetrically arranged. The repulsive sides of the four second bevel gears (503) are fixedly connected to the ends of the four screws (501) that are close to each other.

5. A quality inspection device for metal parts according to claim 1, characterized in that: The adjustable pressure assembly includes horizontal guide rods (8). The four horizontal guide rods (8) are fixedly connected to the sides of the four first pressure sensors (7) respectively. T-shaped clamps (801) are slidably sleeved on the horizontal guide rods (8). Anti-slip rubber (802) is glued and fixed to the sides of the four T-shaped clamps (801) that are close to each other. Locking bolts (803) are squeezed and contacted at the top of the horizontal guide rods (8). The T-shaped clamps (801) are threaded onto the corresponding locking bolts (803). A scale line is provided on one side of the horizontal guide rods (8) to cooperate with the side of the corresponding T-shaped clamps (801).

6. A quality inspection device for metal parts according to claim 3, characterized in that: The workbench (1) is fixedly connected to four legs at the bottom corners, and the movable seat (502) has a threaded hole on one side that is threaded to the corresponding screw (501).

7. A quality inspection device for metal parts according to claim 5, characterized in that: The T-shaped clamp (801) has a rectangular guide groove on the side near the corresponding movable seat (502). The rectangular guide groove is slidably sleeved on the corresponding horizontal guide rod (8). The top inner wall of the rectangular guide groove has a threaded through hole that is threadedly connected to the corresponding locking bolt (803).

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