Detection tool for measuring width of plate-shaped stamping part for automobile

Abstract

A testing fixture for measuring the width of a plate-shaped stamping part for an automobile comprises a detection bench, two sides of the detection bench are respectively provided with a screw-nut mechanism, a nut of each screw-nut mechanism is provided with a measuring cylinder, extension ends of piston rods of the two measuring cylinders are provided with touch sensors, and the two touch sensors are opposite to each other. Chain wheels are arranged on lead screws of the two lead screw nut mechanisms respectively, the two chain wheels are connected through a transmission chain so that the two lead screw nut mechanisms can move synchronously, one lead screw is connected with a motor, and a plurality of electric rollers are arranged on the detection table in the longitudinal direction and used for driving a detected piece to move in the longitudinal direction of the detection table. And the motor, the touch sensor and the electric roller are electrically connected with a PLC (Programmable Logic Controller) arranged on the detection table.

Description

Technical Field

[0001] This utility model relates to the field of automobile manufacturing technology, specifically to a gauge for measuring the width of plate-shaped stamped parts for automobiles. Background Technology

[0002] For example, large sheet metal stamping parts such as car floor panels and dashboards require shaping using stamping dies. After stamping, they must be inspected and qualified before assembly. However, the width of large sheet metal stamping parts is usually measured manually with a tape measure. When operating the tape measure manually, it is difficult to ensure that the tape measure is completely horizontal, vertical, and straight, which can easily lead to measurement errors. Especially for large parts, even small deviations can lead to large measurement errors. When reading the measurement manually, there may be visual errors and misreading, which affects the accuracy of the measurement data. Large sheet metal parts are large in size, and using a tape measure requires multiple measurements and movements, which is cumbersome and time-consuming.

[0003] Ordinary inspection tools often require pre-fabricated inspection molds to fit the edges of stamped parts, and the length of the inspection table is fixed, making it difficult to support stamped parts of different lengths for quality inspection. For example, the rapid inspection device for stamped parts disclosed in CN219798270U includes a base, a right-angle positioning insert, a quick clamp, a vertical positioning mechanism, a horizontal positioning mechanism, a width detection mechanism, and a thickness detection mechanism. The width detection mechanism includes a width seat, a width stop block, a width spring, and a width guide pin. The width seat is fixed to the base, and the width seat has a through slot in the middle, allowing the width to pass through... The middle part of the stop block moves horizontally through the through slot of the width seat. The sliding groove in the middle of the width stop block slides on the width guide pin, which is fixed on the width seat. The convex plate at the outer end of the width stop block abuts against the outer end of the width spring. The inner end of the width stop block has a width stop groove, and the inner end of the width spring abuts against the width seat. This stamping part rapid inspection device can only inspect small stamping parts such as stationary springs, and can only inspect the width of the stationary spring at the fixed position. It also requires the pre-made inspection mold and cannot inspect large plate-shaped stamping parts of different lengths and widths. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a gauge for measuring the width of sheet metal stampings for automobiles. This gauge can extend the feeding distance to inspect stampings of different lengths, achieves multi-mode clamping inspection, eliminates the need for pre-fabricated inspection molds, and also enables the cleaning of surface dust.

[0005] The purpose of this utility model is achieved by the following solution: a gauge for measuring the width of plate-shaped stamped parts for automobiles, comprising a testing platform, with lead screw and nut mechanisms respectively arranged on both sides of the testing platform, a measuring cylinder arranged on the nut of each lead screw and nut mechanism, a touch sensor arranged on the extension end of the piston rod of the two measuring cylinders, the two touch sensors facing each other, a sprocket arranged on the lead screw of each of the two lead screw and nut mechanisms, the two sprockets being connected by a chain drive mechanism to make the two lead screw and nut mechanisms move synchronously, one of the lead screws being connected to a motor, and multiple electric rollers arranged longitudinally on the testing platform to drive the workpiece to be measured to move longitudinally along the testing platform; the motor, touch sensor, electric rollers are electrically connected to a PLC controller arranged on the testing platform.

[0006] Preferably, a guide groove is provided on each of the longitudinal sides of the testing platform, the two guide grooves are parallel, the electric roller is located between the two guide grooves, the lead screw and nut mechanism is set in the guide groove, the nut of the lead screw and nut mechanism is slidably engaged with the guide groove, and the chain drive mechanism between the two lead screw and nut mechanisms is set in the mounting cavity set laterally on the testing platform.

[0007] Preferably, a longitudinal extension device is provided at one longitudinal end of the testing platform. The longitudinal extension device is a U-shaped frame structure. The extension ends of both arms of the U-shaped frame are provided with sliders. The sliders are slidably fitted in the grooves provided on both sides of the testing platform. A torsion rod is installed on the connecting part of the U-shaped frame. A piece of cloth for supporting the test piece is wound on the torsion rod. The fixed end of the cloth is fixedly connected to the torsion rod, and the free end of the cloth is fixedly connected to the axial end of the testing platform to fill the cavity between the two arms of the U-shaped frame.

[0008] Preferably, a strip groove is provided on the connecting part of the U-shaped frame, the strip groove is parallel to the wide side of the testing table, the torsion rod is located in the strip groove, and the two ends of the torsion rod are respectively connected to the U-shaped frame through coil spring shafts.

[0009] Preferably, the groove is a T-shaped groove or a dovetail groove.

[0010] Preferably, a bristle brush cylinder is provided on the testing platform. The two ends of the bristle brush cylinder are supported on the support base provided on the testing platform by shafts. One end of the shaft is a hollow shaft, with one end of the hollow shaft extending into the cavity of the bristle brush cylinder and the other end connected to a negative pressure air pipe. The negative pressure air pipe is connected to a collection box, and the collection box is equipped with a vacuum pump. The vacuum pump is electrically connected to a PLC controller.

[0011] Preferably, the support base includes a bushing, a sleeve, a spring, and a support rod. The support rod is fixedly connected to the testing platform. The sleeve is welded perpendicular to the bushing to the lower end of the bushing. The sleeve is fitted onto the support rod with a clearance fit. The spring is sleeved on the support rod and located below the sleeve. The bushing is used to support the shaft of the brush cylinder.

[0012] Preferably, the lower end of the support rod is provided with a mounting flange, which is connected and fixed to the testing table by bolts.

[0013] Preferably, the measuring cylinder is connected to an air compressor via a solenoid valve, and the solenoid valve, air compressor, and PLC controller are electrically connected.

[0014] The beneficial effects of this utility model are as follows:

[0015] A gauge for measuring the width of sheet metal stampings for automobiles includes a testing platform. Screw-nut mechanisms are respectively installed on both sides of the testing platform. A measuring cylinder is installed on the nut of each screw-nut mechanism. A touch sensor is installed at the extended end of the piston rod of each measuring cylinder, with the two touch sensors facing each other. A sprocket is installed on the screw of each screw-nut mechanism, and the two sprockets are connected by a chain drive mechanism to enable synchronous movement of the two screw-nut mechanisms. One screw is connected to a motor. Multiple electric rollers are arranged longitudinally on the testing platform to drive the workpiece to be measured along the longitudinal direction of the testing platform. The motor, touch sensors, and electric rollers are electrically connected to a PLC controller installed on the testing platform.

[0016] In this way, when inspecting the width of stamped parts of different lengths, the stamped part is simply placed on the inspection table. The electric roller is controlled to move the part to be measured to the appropriate position on the inspection table. Then, the motor is controlled to precisely move the measuring cylinder to the position to be inspected. The piston rod of the measuring cylinder is extended. When the touch sensor on the piston rod is detected, the measuring cylinder automatically stops running, and the width of the stamped part is obtained. This method can meet the requirements for measuring the width of stamped parts of different lengths without the need to pre-make inspection molds. The piston rods of the two measuring cylinders are adjusted to fix the direction and position to the touch sensor, so that even if the edge of the stamped part is irregular, it can fit the spot for width inspection. Moreover, the inspection position is variable, and a variety of stamped parts can be inspected.

[0017] Preferably, a guide groove is provided on each of the longitudinal sides of the testing platform, the two guide grooves are parallel, the electric roller is located between the two guide grooves, the lead screw and nut mechanism is set in the guide groove, the nut of the lead screw and nut mechanism is slidably engaged with the guide groove, and the chain drive mechanism between the two lead screw and nut mechanisms is set in the mounting cavity set laterally on the testing platform.

[0018] By setting guide grooves, the piston rod height of the measuring cylinder can be reduced. The lower detection height makes it easier for operators to perform detection work, reducing fatigue and operational errors caused by height discomfort. Operators can place the object to be detected in the detection position more quickly and accurately, shortening the detection preparation time and thus improving the overall detection efficiency. Lowering the detection height can meet the needs of operators of different heights, allowing more people to perform detection work comfortably and efficiently.

[0019] Preferably, a longitudinal extension device is provided at one longitudinal end of the testing platform. The longitudinal extension device is a U-shaped frame structure. The extension ends of both arms of the U-shaped frame are provided with sliders. The sliders are slidably fitted in the sliding grooves provided on both sides of the testing platform. The sliding grooves are T-shaped grooves or dovetail grooves. A torsion rod is installed on the connecting part of the U-shaped frame. A strip groove is provided on the connecting part of the U-shaped frame. The strip groove is parallel to the wide side of the testing platform. The torsion rod is located in the strip groove. The two ends of the shaft of the torsion rod are respectively connected to the U-shaped frame through coil spring shafts. A piece of cloth for supporting the test piece is wound on the torsion rod. The fixed end of the cloth is fixedly connected to the torsion rod, and the free end of the cloth is fixedly connected to the axial end of the testing platform to fill the cavity between the two arms of the U-shaped frame.

[0020] By setting up a longitudinal extension device, when inspecting the width of a longer stamped part, the longitudinal extension device is first extended out to a suitable position on the inspection table. The slider on the longitudinal extension device is then fixed to the slide groove of the inspection table with bolts. At this time, the cavity between the longitudinal extension device and the inspection table is filled with fabric to prevent the stamped part from falling out. The longer stamped part is placed on the inspection table and the longitudinal extension device. The electric roller is controlled to move the part to be measured to a suitable position on the inspection table. Then, the measuring cylinder is precisely moved to the position to be inspected by controlling the motor. The piston rod of the measuring cylinder is extended outwards. Once the touch sensor on the plunger is activated, the cylinder automatically stops operating, providing the width of the stamped part. This allows for the measurement of the width of longer stamped parts without the need for pre-made inspection molds. The strip groove provides excellent support for the coil spring shaft, ensuring its stability during operation and reducing swaying and offset. The strip groove also protects the coil spring shaft from external impacts and damage to a certain extent, extending its service life. The T-slot or dovetail groove design allows the structure to withstand greater lateral forces and torques. When the slider moves within the groove and bears the working load, it effectively ensures the stability and reliability of the structure.

[0021] Preferably, a fluffy brush cylinder is provided on the testing platform. The two ends of the fluffy brush cylinder are supported on the support base provided on the testing platform by shafts. The support base includes a bushing, a sleeve, a spring, and a support rod. The support rod is fixedly connected to the testing platform. The lower end of the support rod is provided with a mounting flange, which is connected and fixed to the testing platform by bolts. The sleeve is welded perpendicular to the bushing to the lower end of the bushing. The sleeve is fitted onto the support rod with a clearance fit. The spring is sleeved on the support rod and located below the sleeve. The bushing is used to support the shaft of the fluffy brush cylinder. The shaft at one end of the fluffy brush cylinder is a hollow shaft. One end of the hollow shaft extends into the cavity of the fluffy brush cylinder, and the other end is connected to a negative pressure air pipe. The negative pressure air pipe is connected to a collection box. The collection box is equipped with a vacuum pump, which is electrically connected to a PLC controller.

[0022] After the stamped part is inspected, the electric roller is controlled to move the stamped part toward the side with the brush cylinder. When the stamped part passes the brush cylinder, the negative pressure generated by the air pump draws dust and metal debris through the air holes of the brush cylinder into the collection box, thus cleaning the metal debris on the surface of the stamped part. After the inspection is completed, the sealing plate at the bottom of the collection box can be opened to clean the waste. This support can adjust the height of the brush cylinder according to the thickness of the stamped part.

[0023] Preferably, the measuring cylinder is connected to an air compressor via a solenoid valve, and the solenoid valve, air compressor, and PLC controller are electrically connected.

[0024] By providing high-precision control signals through a PLC controller, the opening and closing actions of the solenoid valves can be precisely controlled, thereby achieving precise adjustment of the piston rod of the measuring cylinder. This enables the automated operation of the entire system, eliminating the need for frequent manual intervention and improving production efficiency. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of this utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the testing station of this utility model;

[0027] Figure 3 for Figure 2 A magnified structural diagram of part A in the middle;

[0028] Figure 4 This is a schematic diagram of the structure of the bristle brush cylinder of this utility model.

[0029] Labels in the attached diagram:

[0030] 1. Testing table; 2. Longitudinal extension device; 3. Stamped part; 4. Bolt; 5. Slide groove; 6. Fluff brush tube; 7. Bushing; 8. Negative pressure air pipe; 9. PLC controller; 10. Collection box; 11. Air pump; 12. Slider; 13. Guide groove; 14. Lead screw; 15. Measuring cylinder; 16. Strip groove; 17. Coil spring shaft; 18. Torsion bar; 19. Fabric; 20. Cavity; 21. Nut; 22. Touch sensor; 23. Sprocket; 24. Mounting cavity; 25. Motor; 26. Chain drive mechanism; 27. Electric roller; 28. Spring; 29. ​​Sleeve; 30. Support rod. Detailed Implementation

[0031] See Figures 1 to 4A gauge for measuring the width of sheet metal stampings for automobiles includes a testing platform 1. Screw-nut mechanisms are respectively installed on both sides of the testing platform 1. Measuring cylinders 15 are installed on the nuts 21 of each screw-nut mechanism. The measuring cylinders 15 are connected to an air compressor via solenoid valves. Touch sensors 22 are installed at the extended ends of the piston rods of the two measuring cylinders 15, and the two touch sensors 22 face each other. Sprockets 23 are respectively installed on the screws 14 of the two screw-nut mechanisms. The two sprockets 23 are connected via a chain drive mechanism 26, enabling the two screw-nut mechanisms to move synchronously. One screw 14 is connected to a motor 25. Four electric rollers 27 are arranged longitudinally on the testing platform 1 to drive the workpiece to be measured along the longitudinal direction of the testing platform 1. Guide grooves 13 are respectively provided on both sides of the longitudinal direction of the testing platform 1, and the two guide grooves 13 are parallel. The electric rollers 27 are located between the two guide grooves 13. The screw-nut mechanisms are disposed in the guide grooves 13, and the nuts 21 of the screw-nut mechanisms are slidably engaged with the guide grooves 13. The chain drive mechanism 26 between the nut mechanisms is set in the mounting cavity 24 arranged laterally on the testing table 1; a longitudinal extension device 2 is set at one longitudinal end of the testing table 1. The longitudinal extension device 2 is a U-shaped frame structure. The extension ends of both arms of the U-shaped frame are equipped with sliders 12. The sliders 12 are slidably fitted in the sliding grooves 5 set on both sides of the testing table 1. The sliding grooves 5 are T-shaped grooves or dovetail grooves. The sliders 12 can be fixed to the sliding grooves 5 by bolts 4. A torsion bar is installed on the connecting part of the U-shaped frame. The rod 18 has a groove 16 on the connecting part of the U-shaped frame. The groove 16 is parallel to the wide side of the testing table 1. The torsion rod 18 is located in the groove 16. The two ends of the shaft of the torsion rod 18 are connected to the U-shaped frame through coil spring shafts 17. A piece of cloth 19 for supporting the test piece is wound on the torsion rod 18. The fixed end of the cloth 19 is fixedly connected to the torsion rod 18, and the free end of the cloth 19 is fixedly connected to the axial end of the testing table 1 to fill the cavity 20 between the two arms of the U-shaped frame.A fluffy brush cylinder 6 is mounted on the testing platform 1. Both ends of the fluffy brush cylinder 6 are supported by shafts on a support base mounted on the testing platform 1. The support base includes a bushing 7, a sleeve 29, a spring 28, and a support rod 30. The support rod 30 is fixedly connected to the testing platform 1. The lower end of the support rod 30 has a mounting flange, which is bolted to the testing platform 1. The sleeve 29 is welded perpendicularly to the lower end of the bushing 7 and is fitted onto the support rod 30 with a clearance fit. The spring 28 is sleeved on the support rod 30 and located below the sleeve 29. The bushing 7 supports the shaft of the fluffy brush cylinder 6. One end of the shaft of the fluffy brush cylinder 6 is a hollow shaft, with one end extending into the cavity of the fluffy brush cylinder 6. The other end is connected to a negative pressure air pipe 8. The hollow shaft and the negative pressure air pipe 8 are fitted with a clearance. The negative pressure air pipe 8 is connected to a collection box 10. The collection box 10 is equipped with a suction pump 11. The air inlet of the suction pump 11 is connected to the collection box 10. A sealing plate is installed at the bottom of the collection box 10. The collection box 10 is equipped with a filter device to prevent dust and metal debris from being drawn out of the collection box 10 by the suction pump 11. The suction pump 11, motor 25, touch sensor 22, electric roller 27, solenoid valve, and air compressor are electrically connected to the PLC controller 9 installed on the testing platform 1. The suction pump 11, motor 25, touch sensor 22, electric roller 27, solenoid valve, air compressor, and PLC controller 9 are all connected to the control box.

[0032] See Figure 2To inspect a stamped part 3 whose length is greater than the width of the inspection table 1, the longitudinal extension device 2 is first extended out of the inspection table 1 to a suitable position. The slider 12 on the longitudinal extension device 2 is fixed to the slide groove 5 of the inspection table 1 with bolts 4. At this time, the cloth 19 on the torsion rod 18 fills the cavity between the U-shaped frame of the longitudinal extension device 2 and the inspection table 1. The cloth 19 is taut. The two test surfaces of the stamped part 3 are placed parallel to the two guide grooves 13 on the inspection table 1 and the longitudinal extension device 2. The electric roller 27 is rotated by the PLC controller 9 to move the test point of the stamped part 3 to the middle two electric rollers 27 on the inspection table 1. The motor 25 is rotated by the PLC controller 9 to move the measuring cylinder 15 synchronously, so that the piston rod on the measuring cylinder 15 is aligned with the test point on the stamped part 3. The PLC controller 9 controls the solenoid valve and air compressor to move the piston rod on the measuring cylinder 15 towards the stamping part 3. When the touch sensor 22 on the piston rod touches the stamping part 3, the PLC controller 9 controls the solenoid valve and air compressor to stop the piston rod on the measuring cylinder 15, thus obtaining the width of the detection point on the stamping part 3. The PLC controller 9 then controls the solenoid valve and air compressor to retract the piston rod on the measuring cylinder 15. The PLC controller 9 controls the electric roller 27 to rotate, moving the stamping part 3 towards the brush cylinder 6. The PLC controller 9 turns on the vacuum pump 11. When the stamping part 3 moves below the brush cylinder 6, the negative pressure generated by the vacuum pump 11 draws dust and metal debris from the air holes of the brush cylinder 6 through the negative pressure air pipe 8 into the collection box.

[0033] After the width of the stamped part 3 is inspected, loosen the bolt 4, close the longitudinal extension device 2, and open the sealing plate at the bottom of the collection box 10 for cleaning.

[0034] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications made to the present utility model by those skilled in the art without departing from the spirit of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A gauge for measuring the width of sheet metal stampings for automobiles, comprising a measuring table (1), characterized in that: The testing platform (1) is provided with screw and nut mechanisms on both sides. Each screw and nut mechanism has a measuring cylinder (15) on its nut (21). The piston rods of the two measuring cylinders (15) are extended with touch sensors (22). The two touch sensors (22) face each other. The screws (14) of the two screw and nut mechanisms are respectively provided with sprockets (23). The two sprockets (23) are connected through a chain drive mechanism (26) to make the two screw and nut mechanisms move synchronously. One of the screws (14) is connected to a motor (25). The testing platform (1) is provided with multiple electric rollers (27) arranged longitudinally to drive the test piece to move longitudinally along the testing platform (1). The motor (25), touch sensor (22), electric roller (27) are electrically connected to the PLC controller (9) provided on the testing platform (1).

2. The inspection tool for measuring the width of plate-shaped stamped parts for automobiles according to claim 1, characterized in that: The testing platform (1) has a guide groove (13) on each of its longitudinal sides. The two guide grooves (13) are parallel. The electric roller (27) is located between the two guide grooves (13). The screw nut mechanism is set in the guide groove (13). The nut (21) of the screw nut mechanism is slidably engaged with the guide groove (13). The chain drive mechanism (26) between the two screw nut mechanisms is set in the mounting cavity (24) set laterally on the testing platform (1).

3. The inspection fixture for measuring the width of plate-shaped stamped parts for automobiles according to claim 1, characterized in that: A longitudinal extension device (2) is provided at one longitudinal end of the testing platform (1). The longitudinal extension device (2) is a U-shaped frame structure. The extension ends of both arms of the U-shaped frame are provided with sliders (12). The sliders (12) are slidably fitted in the sliding grooves (5) provided on both sides of the testing platform (1). A torsion rod (18) is installed on the connecting part of the U-shaped frame. A piece of cloth (19) for supporting the test piece is wound on the torsion rod (18). The fixed end of the cloth (19) is fixedly connected to the torsion rod (18), and the free end of the cloth (19) is fixedly connected to the axial end of the testing platform (1) to fill the cavity (20) between the two arms of the U-shaped frame.

4. A gauge for measuring the width of sheet metal stampings for automobiles according to claim 3, characterized in that: A strip groove (16) is provided on the connecting part of the U-shaped frame. The strip groove (16) is parallel to the wide side of the testing table (1). The torsion bar (18) is located in the strip groove (16). The two ends of the shaft of the torsion bar (18) are connected to the U-shaped frame through the coil spring shaft (17).

5. A gauge for measuring the width of sheet metal stampings for automobiles according to claim 3, characterized in that: The groove (5) is a T-shaped groove or a dovetail groove.

6. A gauge for measuring the width of sheet metal stampings for automobiles according to claim 1, characterized in that: A bristle brush cylinder (6) is provided on the testing platform (1). The two ends of the bristle brush cylinder (6) are supported on the support base provided on the testing platform (1) by shafts. One end of the shaft is a hollow shaft. One end of the hollow shaft extends into the cavity of the bristle brush cylinder (6), and the other end is connected to a negative pressure air pipe (8). The negative pressure air pipe (8) is connected to a collection box (10). The collection box (10) is equipped with a vacuum pump (11). The vacuum pump (11) is electrically connected to a PLC controller (9).

7. A gauge for measuring the width of sheet metal stampings for automobiles according to claim 6, characterized in that: The support base includes a bushing (7), a sleeve (29), a spring (28), and a support rod (30). The support rod (30) is fixedly connected to the testing table (1). The sleeve (29) is welded perpendicular to the bushing (7) to the lower end of the bushing (7). The sleeve (29) is fitted with the support rod (30) with clearance. The spring (28) is sleeved on the support rod (30) and located below the sleeve (29). The bushing (7) is used to support the shaft of the brush cylinder (6).

8. A gauge for measuring the width of sheet metal stampings for automobiles according to claim 7, characterized in that: The lower end of the support rod (30) is provided with an installation flange, which is connected and fixed to the test bench (1) by bolts.

9. A gauge for measuring the width of sheet metal stampings for automobiles according to claim 1, characterized in that: The measuring cylinder (15) is connected to the air compressor via a solenoid valve, and the solenoid valve, the air compressor and the PLC controller (9) are electrically connected.

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