Passenger car passenger door frame size laser detection device and detection method

Abstract

The invention relates to the technical field of passenger car passenger door frame processing, and discloses a passenger car passenger door frame size laser detection device and method, and the device comprises a positioning assembly, the positioning assembly comprises a working platform, and the surface of the working platform is provided with a limiting mechanism used for positioning a door frame. A feeding assembly used for feeding is arranged on one side of the positioning assembly. According to the device, the door frame can be positioned, the problem of inaccurate measurement caused by inclination of the door frame during laser measurement is solved, automatic feeding is realized, the problem of door frame deformation caused by manual lifting feeding is solved, a light solution is displayed on the door frame, and the problem that the accuracy of laser detection is influenced by the light absorption property of a door frame material is solved; the problem that the solution is uneven due to dust when being smeared is solved, inaccurate laser detection caused by non-uniform distribution of the solution is also avoided, quick disassembly of the scraping blade is also realized, and quick assembly and disassembly of the scraping blade are realized.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of passenger door frame machining, in particular to a passenger door frame size laser detection device and method. BACKGROUND

[0002] The passenger door frame is the basic structure of the whole vehicle, and the size precision directly affects the assembly quality of subsequent vehicle body coverings, doors and windows, interior parts and the like.

[0003] In the production process of the passenger door, the size precision of the passenger door frame directly affects the assembly quality, sealing performance and safety of the whole vehicle, and the laser detection technology has obvious advantages in passenger door frame size measurement due to its high precision, high efficiency and non-contact characteristics.

[0004] However, when the existing passenger door frame is subjected to laser detection after welding and polishing, the door frame is manually operated during feeding, and the position of the door frame placed each time is different, so that the laser detection size is offset and has errors, and the surface of the door frame is without paint, which may cause high light absorption due to the dark color of the door frame material, thereby causing errors in the laser detection size. SUMMARY

[0005] In view of the deficiencies of the prior art, the application provides a passenger door frame size laser detection device and method, which mainly solves the problem that the existing passenger door frame is subjected to laser detection after welding and polishing, the door frame is manually operated during feeding, the position of the door frame placed each time is different, the laser detection size is offset and has errors, and the surface of the door frame is without paint, which may cause high light absorption due to the dark color of the door frame material, thereby causing errors in the laser detection size.

[0006] To achieve the above purpose, the application provides the following technical scheme. A passenger door frame size laser detection device, comprising a positioning assembly, the positioning assembly comprising a workbench, the surface of the workbench being provided with a limiting mechanism for positioning the door frame, one side of the positioning assembly being provided with a feeding assembly for feeding, and the surface of the positioning assembly being provided with an auxiliary display assembly for assisting the laser detector in detection.

[0007] As a further further scheme of the present application, the limiting assembly comprises a first motor mounted on the bottom surface of the working platform, the output shaft of the first motor is provided with a bidirectional screw rod through a shaft coupling, the surface of the bidirectional screw rod is symmetrically provided with two first silk blocks in threaded connection, the surface of each first silk block is fixedly connected with two connecting rods, the bottom surface of the working platform is uniformly fixedly connected with a plurality of fixed frames, each fixed frame is internally provided with a connecting block, each fixed frame is internally provided with a sliding rail, the connecting block is in sliding connection with the fixed frame through the sliding rail, the top surface of the working platform is symmetrically provided with two first clamping plates, two connecting blocks located on the same side penetrate the surface of the working platform and are fixedly connected with the corresponding first clamping plates, and the internal part of the first clamping plate is provided with a positioning mechanism.

[0008] As a further further scheme of the present application, the positioning mechanism comprises a second motor mounted on the surface of the first clamping plate, the output shaft of the second motor is provided with a first bevel gear through a shaft coupling, the surface of the first bevel gear is symmetrically meshed with two second bevel gears, the surface of each second bevel gear is fixedly connected with a first lead screw, the internal part of the first clamping plate is provided with a sliding groove, the internal part of the sliding groove is symmetrically provided with two second clamping plates, each second clamping plate is in sliding connection with the first clamping plate through the sliding groove, the surface of each second clamping plate is fixedly connected with a second silk block, and the second silk block is in threaded connection with the first lead screw.

[0009] As a further further scheme of the present application, the feeding assembly comprises a lifting support arranged on one side of the working platform, a feeding plate is mounted at the top end of the lifting support, a third motor is mounted on the bottom surface of the feeding plate, the output shaft of the third motor is provided with a second lead screw through a shaft coupling, the surface of the second lead screw is provided with a linkage block in threaded connection, a track is mounted on the top surface of the feeding plate, the linkage block is in sliding connection with the track, the surface of the linkage block is fixedly connected with a first top plate, the surface of the first top plate is fixedly connected with a fixing frame, a pull block is in sliding connection with the internal part of the fixing frame, one end of the pull block close to the feeding plate is fixedly connected with a second top plate, and the bottom surface of the working platform is provided with a transfer mechanism for transferring the door frame to a suitable position.

[0010] As a further further scheme of the present application, the transfer mechanism comprises a ball screw linear slide module mounted on the bottom surface of the working platform, a cylinder is mounted on the threaded table surface of the ball screw linear slide module, the cylinder penetrates the surface of the working platform and is in sliding connection therewith.

[0011] As a further further scheme of the present application, the auxiliary display assembly comprises an XYZ moving platform, a mounting plate is fixedly connected to the surface of the XYZ moving platform, a Malta cross is rotatably connected to the surface of the mounting plate through a bearing, a mounting groove is installed on the surface of the XYZ moving platform, a groove wheel is installed on the output shaft of the mounting groove, the groove wheel and the Malta cross are mutually attached, a positioning plate is fixedly connected to the side of the Malta cross away from the mounting plate, a clamp is arranged on the side of the positioning plate away from the Malta cross, a positioning column is arranged between the positioning plate and the clamp, an installation groove is formed in one end of the positioning column, two clamping blocks are symmetrically arranged in the installation groove, two knobs are symmetrically arranged on the surface of the positioning column, the two knobs penetrate the surface of the positioning column and are threadedly connected with the clamping blocks, and a liquid coating mechanism for improving the laser detection accuracy is arranged on one end of the positioning column.

[0012] As a further further scheme of the present application, the positioning column is fixedly connected with a limiting block, and the limiting block and the clamp are mutually attached.

[0013] As a further further scheme of the present application, the liquid coating mechanism comprises a water pump installed on the surface of the XYZ moving platform, a water pipe is installed on the output end of the water pump, the water pipe penetrates the mounting plate, the Malta cross and the positioning plate respectively and is inserted into the inside of the positioning column, a limiting ring is arranged in the inside of the positioning column, a clamping groove matched with the limiting ring is formed in one end of the water pipe inserted into the inside of the positioning column, the limiting ring is rotatably connected with the water pipe through the clamping groove, a spraying head is installed on the end of the positioning column away from the mounting groove, and a cleaning mechanism is arranged on the end of the positioning column.

[0014] As a further further scheme of the present application, the cleaning mechanism comprises a limiting ring fixedly connected to one end of the positioning column, a plurality of fixed rods are uniformly fixedly connected to the surface of the limiting ring, a connecting frame is rotatably connected to one end of each fixed rod away from the limiting ring through a positioning shaft, a positioning groove is formed in the end of the positioning column corresponding to the connecting frame, the connecting frame is inserted into the inside of the positioning groove, two fixed cylinders are symmetrically fixedly connected to the end of the connecting frame away from the positioning column, a positioning rod is slidably connected in the inside of each fixed cylinder, a scraping piece is fixedly connected to one end of the positioning rod away from the fixed cylinder, two through grooves are symmetrically formed in the surface of the fixed cylinder, a sliding block is arranged in the inside of each through groove, the sliding block is slidably connected with the fixed cylinder through the through groove, the sliding block and the positioning rod are fixedly connected, and a spring is arranged in the inside of the fixed cylinder.

[0015] A passenger car passenger door frame size laser detection method comprises the following steps: S1: when the need to load, start lifting support, so that the lifting support driven to drop the discharge plate, until the drop to the appropriate position, so that the door frame can be directly pushed from the transfer car to the surface of the discharge plate, and then start the lifting support again so that the discharge plate and the work platform is the same axis, and then make the third motor connected to the external power and then start, the second screw rod rotation will drive the linkage block on the surface of the track to move, thus driving the first roof, the door frame to the direction of the work platform, until the appropriate position, and then start the ball screw linear slide module, so that the threaded table ball screw linear slide module driven cylinder to move to the door frame, and then make the cylinder connected to the external power and then start, the output shaft of the cylinder will extend upwards, until more than the upper surface of the work platform, and then make the threaded table ball screw linear slide module to move away from the discharge plate, until the appropriate position, the appropriate position is not the movement limit of the ball screw linear slide module, but to make the door frame between the two second clamping plate, and then retract the output shaft of the cylinder, the door frame to achieve the repositioning; S2: when the door frame is clamped and positioned, the door frame is placed on the surface of the work platform, and then the first motor is connected to the external power and then started, the bidirectional screw will be rotated, and the first silk block connected with the screw will drive the connecting block to move in the fixed frame, so that the two first clamping plates are close to each other, until the two first clamping plates contact and extrude the door frame, forcing the door frame to move on the surface of the work platform. Because the work platform is made of steel, and in order to make the door frame move more smoothly, the surface of the work platform will be cleaned and polished regularly, until the door frame is located at the center of the work platform, which realizes the preliminary positioning of the door frame. Then make the second motor connected to the external power and then start, the first bevel gear will drive the two second bevel gears to rotate the two first screws, so that the two second clamping plates will move close to each other in the sliding slot, until they contact the door frame and push the door frame. Because the function of the first clamping plate is to correct the displacement of the door frame, it will not exert high strength clamping force on the door frame, and the surface of the first clamping plate is relatively smooth, so the friction is small, and therefore it will not produce a large burden on the movement of the door frame. The movement of the second clamping plate will finally push the door frame to the center of the work platform, which is convenient for the laser detector to measure, thus realizing the positioning of the door frame; S3: After positioning the door frame, place the positioning column in the appropriate position, then connect the water pipe to the water pump, and then lock it with the clamp. When clamping the positioning column, the limiting block cooperates with the shape of the clamp, so that the positioning column will not rotate or come off after being positioned. Then place the laser detector inside the installation slot, and then turn the two knobs to make the two clamping blocks close to each other and clamp the laser detector. In order to prevent the light absorption of the door frame material from affecting the accuracy of laser detection, a layer of light-reflecting liquid needs to be applied to the surface of the door frame before detection. First, mix a bucket of solution outside, then pump it into the water pipe through the water pump, and then spray it onto the surface of the door frame through the spray head. By starting the XYZ moving platform, the positioning column can move along the shape and size of the door frame; S4: When the door frame is coated with the solution, the XYZ moving platform moves the positioning column towards the door frame until the scraper is in close contact with the door frame. The spring is compressed and the positioning rod slides inside the fixed cylinder. Then the XYZ moving platform moves in one direction. At this time, the scraper located in the moving direction of the XYZ moving platform is perpendicular to the door frame due to the limiting of the positioning groove to the connecting frame, and the dust on the surface of the door frame is scraped off. The side of the scraper facing the dust is arc-shaped, which can push the dust to both sides of the door frame, so that the solution is not unevenly coated due to dust. The other side of the scraper will rotate inside the fixed rod due to the limiting of the positioning groove, and only due to the gravity and the surface of the door frame, the solution will be scraped flat, avoiding inaccurate laser detection due to uneven distribution of the solution; S5: After the coating is completed, connect the installation slot to the external power supply and then start. The slot wheel drives the Maltese cross to rotate. Due to the cooperation between the slot wheel and the Maltese cross shape, the Maltese cross rotates by ninety degrees each time until it rotates one hundred and eighty degrees. Then the laser detector is directed towards the door frame. Then move the laser detector along the size of the door frame by the XYZ moving platform to the appropriate position for point detection. If the door frame is deformed, it will cause the point to deviate, so as to detect whether the door frame meets the size standard, which realizes the detection of the door frame. After the detection is completed, clean the surface of the workbench with the external cleaning brush plate. The solution on the surface of the door frame can be washed off with clean water; S6: when the door frame measurement is completed, the air cylinder is moved to the outside of the door frame away from the discharging plate through the ball screw linear slide module, then the door frame is limited through the air cylinder, and then the door frame is pushed to the direction of the discharging plate through the ball screw linear slide module until the door frame is pushed to a suitable position, so that the first top plate and the second top plate are inserted into the frame, and the first top plate and the second top plate clamp the door frame, then the output shaft of the air cylinder is retracted, then the third motor is started, so that the first top plate moves to the initial position, the second top plate drives the door frame to move until the door frame moves to a suitable position, then the second top plate is lifted, and the door frame is released, so that the door frame is discharged; S7: when the wiper blade needs to be replaced, the two sliding blocks are pressed towards the center, so that the positioning rod is no longer limited by the sliding blocks, and the positioning rod can be taken out from the inside of the fixed cylinder, facilitating replacement of the wiper blade.

[0016] Compared with the prior art, the passenger door frame size laser detection device and method have the following beneficial effects: 1、The first clamping plate and the second clamping plate are matched, the positioning of the door frame is realized, and the inaccuracy caused by the inclination of the door frame during laser measurement is solved.

[0017] 2、The first top plate, the second top plate and the air cylinder are matched, automatic feeding is realized, and the deformation of the door frame caused by the lifting of workers during feeding is solved.

[0018] 3、The water pump, the water pipe and the spraying head are matched, the door frame is sprayed with the light solution, and the accuracy of laser detection is affected by the light absorption of the material of the door frame.

[0019] 4、The wiper blade and the connecting frame are matched, the surface of the door frame is cleaned, and the light solution is scraped flat, so that the solution is not uneven due to dust during smearing, and laser detection is not inaccurate due to uneven distribution of the solution.

[0020] 5、The positioning rod and the sliding block are matched, the wiper blade is quickly removed, and the wiper blade is quickly assembled and disassembled. DETAILED DESCRIPTION

[0021] Figure 1 It is a front side three-dimensional structure schematic view of a passenger door frame size laser detection device; Figure 2 It is a lifting support and discharging plate structure schematic view of a passenger door frame size laser detection device; Figure 3 It is a second top plate and pull block structure schematic view of a passenger door frame size laser detection device; Figure 4 This is a schematic diagram of the first motor and bidirectional screw structure of a laser detection device for passenger door frame dimensions of a bus proposed in this invention; Figure 5 This is a schematic diagram of the fixed frame and connecting block structure of a laser detection device for passenger door frame dimensions of a bus proposed in this invention; Figure 6 This is a schematic diagram of the first and second bevel gears of a laser detection device for passenger door frame dimensions of a bus proposed in this invention. Figure 7 This is a schematic diagram of the Maltese cross and grooved wheel structure of a laser detection device for passenger door frame dimensions of a bus proposed in this invention; Figure 8 This is a schematic diagram of the positioning column and limiting ring structure of a laser detection device for passenger door frame dimensions of a bus proposed in this invention; Figure 9 This is a schematic diagram of the positioning groove and connecting frame structure of a laser detection device for passenger door frame dimensions of a bus proposed in this invention; Figure 10 This invention proposes a laser detection device for the dimensions of passenger door frames in passenger vehicles. Figure 9 A schematic diagram of the cross-sectional structure of part A; Figure 11 This is a schematic diagram of the vertical cross-sectional structure of the positioning column of a laser detection device for passenger door frame dimensions of a bus proposed in this invention; Figure 12 This is a schematic diagram of the limiting ring and water pipe structure of a laser detection device for the dimensions of a passenger door frame in a bus, as proposed in this invention.

[0022] In the figure: 1, positioning assembly; 11, working platform; 12, first motor; 13, fixed frame; 14, bidirectional screw rod; 15, connecting rod; 16, first clamping plate; 17, connecting block; 18, second motor; 19, first bevel gear; 110, second bevel gear; 111, first screw rod; 112, first screw block; 113, second clamping plate; 114, second screw block; 2, feeding assembly; 21, feeding plate; 22, lifting support; 23, third motor; 24, second screw rod; 25, track; 26, linkage block; 27, first top plate; 28, fixed frame; 29, second top plate; 210, pulling block; 211, ball screw linear slide module; 212, air cylinder; 3, auxiliary display assembly; 31, XYZ moving platform; 32, water pump; 33, mounting plate; 34, Maltese cross; 35, positioning plate; 36, clamp; 37, positioning column; 38, knob; 39, mounting groove; 310, groove wheel; 311, water pipe; 312, spray head; 313, positioning ring; 314, fixed rod; 315, positioning groove; 316, connecting frame; 317, fixed cylinder; 318, positioning rod; 319, clamping groove; 320, sliding block; 321, through groove; 322, scraper; 323, limiting block; 324, limiting ring; 325, clamping block. DETAILED DESCRIPTION

[0023] In order to make the objects, technical solutions and advantages of the present application clearer, the present application will be further described in detail below by embodiments and in conjunction with the drawings. It should be understood that the specific embodiments described herein are only used to explain the present application and not used to limit the present application.

[0024] The serial numbers of the components in this paper, such as "first", "second", etc., are only used to distinguish the described objects and do not have any sequence or technical meaning. And the "connection" and "coupling" of the present application include direct and indirect connection (coupling) unless otherwise specified. In the description of the present application, it should be understood that the orientation or position relationship indicated by the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0025] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is higher in horizontal height than the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is lower in horizontal height than the second feature.

[0026] Referring to Figures 1-12 A passenger car passenger door frame size laser detection device, comprising a positioning assembly 1, the positioning assembly 1 includes a workbench 11, the surface of the workbench 11 is provided with a limiting mechanism for positioning the door frame, one side of the positioning assembly 1 is provided with a feeding assembly 2 for feeding, the surface of the positioning assembly 1 is provided with an auxiliary display assembly 3 for assisting the laser detector to detect.

[0027] In order to solve the technical problem of positioning the door frame, the limiting component of the application comprises a first motor 12 installed on the bottom surface of the working platform 11, the output shaft of the first motor 12 is provided with a bidirectional screw rod 14 through a shaft coupling, the surface of the bidirectional screw rod 14 is symmetrically provided with two first silk blocks 112, the surface of each first silk block 112 is fixedly connected with two connecting rods 15, the bottom surface of the working platform 11 is uniformly fixedly connected with a plurality of fixed frames 13, the inside of each fixed frame 13 is provided with a connecting block 17, the inside of each fixed frame 13 is provided with a sliding rail, the connecting block 17 is slidingly connected with the fixed frame 13 through the sliding rail, the top surface of the working platform 11 is symmetrically provided with two first clamping plates 16, the two connecting blocks 17 located on the same side penetrate the surface of the working platform 11 and are fixedly connected with the corresponding first clamping plate 16, and the inside of the first clamping plate 16 is provided with a positioning mechanism. The positioning mechanism comprises a second motor 18 installed on the surface of the first clamping plate 16, the output shaft of the second motor 18 is provided with a first bevel gear 19 through a shaft coupling, the surface of the first bevel gear 19 is symmetrically meshed with two second bevel gears 110, the surface of each second bevel gear 110 is fixedly connected with a first lead screw 111, the inside of the first clamping plate 16 is provided with a sliding groove, the inside of the sliding groove is symmetrically provided with two second clamping plates 113, each second clamping plate 113 is slidingly connected with the first clamping plate 16 through the sliding groove, the surface of each second clamping plate 113 is fixedly connected with a second silk block 114, and the second silk block 114 is threadedly connected with the first lead screw 111. When the door frame is clamped and positioned, the door frame is placed on the surface of the working platform 11, then the first motor 12 is connected with an external power source and started, the bidirectional screw rod 14 will be rotated, the first silk block 112 threadedly connected with the bidirectional screw rod 14 will drive the connecting block 17 to move in the fixed frame 13 through the connecting rod 15, so that the two first clamping plates 16 are close to each other, until the two first clamping plates 16 are in contact with the door frame and extrude the door frame, forcing the door frame to move on the surface of the working platform 11, because the working platform 11 is made of steel material, and in order to make the door frame move more smoothly, the surface of the working platform 11 is regularly cleaned and polished, until the door frame is located at the center position of the working platform 11, the preliminary positioning of the door frame is realized, then the second motor 18 is connected with an external power source and started, the first bevel gear 19 drives the two second bevel gears 110 to rotate, so that the two first lead screws 111 rotate, the two second silk blocks 114 drive the two second clamping plates 113 to move close to each other in the sliding groove, until the two second clamping plates 113 are in contact with the door frame and push the door frame, because the first clamping plate 16 has the function of correcting the displacement of the door frame, it will not have a high-strength clamping force on the door frame, and the surface of the first clamping plate 16 is relatively smooth, so the friction is small, therefore it will not have a large burden on the movement of the door frame, the movement of the second clamping plate 113 finally pushes the door frame to the center position of the working platform 11, which is convenient for the laser detector to measure, and the positioning of the door frame is realized.

[0028] In order to solve the technical problem of feeding and discharging the door frame, the feeding assembly 2 of the present application comprises a lifting support 22 arranged on one side of the working platform 11, a discharging plate 21 is installed at the top end of the lifting support 22, a third motor 23 is installed on the bottom surface of the discharging plate 21, a second lead screw 24 is installed on the output shaft of the third motor 23 through a shaft coupling, a linkage block 26 is threadedly connected to the surface of the second lead screw 24, a rail 25 is installed on the top surface of the discharging plate 21, the linkage block 26 is slidingly connected with the rail 25, a first top plate 27 is fixedly connected to the surface of the linkage block 26, a fixing frame 28 is fixedly connected to the surface of the first top plate 27, a pull block 210 is slidingly connected in the fixing frame 28, a second top plate 29 is fixedly connected to one end of the pull block 210 close to the discharging plate 21, and a transfer mechanism for conveying the door frame to a suitable position is arranged on the bottom surface of the working platform 11. The transfer mechanism comprises a ball screw linear slide module 211 installed on the bottom surface of the working platform 11, a cylinder 212 is installed on the threaded table surface of the ball screw linear slide module 211, the cylinder 212 penetrates through the surface of the working platform 11 and is slidingly connected with the same. Due to the shape of the door frame and the fact that it is welded, in order to prevent the door frame from being deformed when workers lift the feeding, when feeding is needed, the lifting support 22 is started, so that the lifting support 22 drives the discharging plate 21 to descend until it reaches a suitable position, so that the door frame can be directly pushed onto the surface of the discharging plate 21 from the transfer trolley, then the lifting support 22 is started again to make the discharging plate 21 and the working platform 11 have the same axis, then the third motor 23 is connected to an external power source and then started, the second lead screw 24 rotates to drive the linkage block 26 to move on the surface of the rail 25, thereby driving the first top plate 27 to push the door frame in the direction of the working platform 11 until it is pushed to a suitable position, then the ball screw linear slide module 211 is started to drive the threaded table of the ball screw linear slide module 211 to move the cylinder 212 into the door frame, then the cylinder 212 is connected to an external power source and then started, the output shaft of the cylinder 212 extends upward until it exceeds the upper surface of the working platform 11, then the threaded table of the ball screw linear slide module 211 moves away from the discharging plate 21 until it moves to a suitable position, which is not the movement limiting position of the ball screw linear slide module 211, but makes the door frame located between the two second clamping plates 113, and then the output shaft of the cylinder 212 is retracted, thereby achieving the movement of the door frame again.When the door frame measurement is completed, the ball screw linear slide module 211 moves the cylinder 212 to the outside of the door frame away from the discharging plate 21, then the cylinder 212 limits the door frame, and then the ball screw linear slide module 211 pushes the door frame to the direction of the discharging plate 21 until it is pushed to the appropriate position, so that the first top plate 27 and the side of the door frame are mutually attached, and the second top plate 29 is inserted into the frame, so that the first top plate 27 and the second top plate 29 clamp the door frame, then the output shaft of the cylinder 212 is retracted, then the third motor 23 is started, so that the first top plate 27 moves to the initial position, the second top plate 29 drives the door frame to move until it moves to the appropriate position, then the second top plate 29 is lifted, and the door frame is released, so that the discharging of the door frame is realized.

[0029] It should be noted that the ball screw linear slide module 211 includes linear guide rails, ball screws, support seats, couplings, motors, and photoelectric switches, and other components, which will not be described here.

[0030] In order to solve the technical problem of making detection more accurate, the auxiliary display assembly 3 of the present application comprises an XYZ moving platform 31, the surface of the XYZ moving platform 31 is fixedly connected with a mounting plate 33, the surface of the mounting plate 33 is rotatably connected with a Malta cross 34 through a bearing, the surface of the XYZ moving platform 31 is provided with a mounting groove 39, the output shaft of the mounting groove 39 is provided with a groove wheel 310, the groove wheel 310 and the Malta cross 34 are mutually matched, one side of the Malta cross 34 away from the mounting plate 33 is fixedly connected with a positioning plate 35, one side of the positioning plate 35 away from the Malta cross 34 is provided with a clamp 36, a positioning column 37 is arranged between the positioning plate 35 and the clamp 36, one end of the positioning column 37 is provided with a mounting groove 39, two clamping blocks 325 are symmetrically arranged in the mounting groove 39, two knobs 38 are symmetrically arranged on the surface of the positioning column 37, the two knobs 38 penetrate through the surface of the positioning column 37 and are threadedly connected with the clamping blocks 325, and one end of the positioning column 37 is provided with a liquid coating mechanism for improving the laser detection precision. The liquid coating mechanism comprises a water pump 32 mounted on the surface of the XYZ moving platform 31, the output end of the water pump 32 is provided with a water pipe 311, the water pipe 311 penetrates through the mounting plate 33, the Malta cross 34 and the positioning plate 35 and is inserted into the inside of the positioning column 37, a limiting ring 324 is arranged in the inside of the positioning column 37, one end of the water pipe 311 inserted into the inside of the positioning column 37 is provided with a clamping groove 319 matched with the limiting ring 324, the limiting ring 324 is rotatably connected with the water pipe 311 through the clamping groove 319, a spraying head 312 is mounted on one end of the positioning column 37 away from the mounting groove 39, and a cleaning mechanism is arranged on one end of the positioning column 37.After positioning the door frame, place the positioning column 37 to the appropriate position, connect the water pipe 311 with the water pump 32, then lock it through the clamp 36, then place the laser detector in the installation groove 39, and rotate the two knobs 38 to make the two clamping blocks 325 close to each other and clamp the laser detector. In order to prevent the light absorption of the door frame material from affecting the accuracy of laser detection, a layer of light-reflecting liquid needs to be applied to the surface of the door frame before detection. First, a bucket of solution is prepared outside, then it is sucked into the water pipe 311 through the water pump 32, and then sprayed onto the surface of the door frame through the spray head 312. By starting the XYZ moving platform 31, the positioning column 37 can move along the shape and size of the door frame. After the application is completed, connect the installation groove 39 to the external power supply and start it. The groove wheel 310 drives the Malta cross 34 to rotate. Because the groove wheel 310 and the Malta cross 34 are matched in shape, the Malta cross 34 rotates by 90 degrees each time, until the Malta cross 34 rotates by 180 degrees, so that the laser detector faces the door frame. Then, the XYZ moving platform 31 drives the laser detector to move along the size of the door frame, and when it reaches the appropriate position, it performs point detection. If the door frame is deformed, it will cause point deviation, so as to detect whether the door frame meets the size standard, that is, the detection of the door frame is realized. After the detection is completed, the external cleaning brush plate is used to clean the surface of the work platform 11. The solution on the surface of the door frame can be washed away by clean water.

[0031] It should be noted that the XYZ moving platform 31 includes XYZ direction moving guide rail, cross roller bearing, base and frame, linear motor, laser interferometer, grating ruler and capacitive or inductive sensor, etc. Hereinafter, it will not be described one by one.

[0032] It should be noted that the light-reflecting solution also contains corn starch, water and a small amount of glycerol, etc. It has the characteristics of environmental protection and easy cleaning.

[0033] It should be noted that the laser detector includes SICK+OD2 series, Omron ZX-LT300 and other different detectors. Hereinafter, it will not be described one by one. According to different door frames, it can be replaced.

[0034] In order to solve the technical problem of positioning the laser detector, the surface of the positioning column 37 is fixedly connected with the limiting block 323, and the limiting block 323 is matched with the clamp 36. When the positioning column 37 is clamped, because the limiting block 323 is matched with the clamp 36 in shape, the positioning column 37 will not rotate or separate after being positioned.

[0035] In order to solve the technical problem of cleaning the surface dust of the door frame, the cleaning mechanism comprises a positioning ring 313 mounted at one end of the positioning column 37, a plurality of fixed rods 314 are uniformly and fixedly connected to the surface of the positioning ring 313, the end of each fixed rod 314 away from the positioning ring 313 is rotatably connected with a connecting frame 316 through a positioning shaft, the one end of the positioning column 37 corresponds to the position of the connecting frame 316, and the one end of the connecting frame 316 is inserted into the inside of the positioning groove 315, the end of the connecting frame 316 away from the positioning column 37 is fixedly connected with two fixed cylinders 317 in a symmetrical manner, the inside of each fixed cylinder 317 is slidably connected with a positioning rod 318, the end of the positioning rod 318 away from the fixed cylinder 317 is fixedly connected with a scraper 322, the surface of the fixed cylinder 317 is symmetrically provided with two through grooves 321, the inside of each through groove 321 is provided with a sliding block 320, the sliding block 320 is slidably connected with the fixed cylinder 317 through the through groove 321, the sliding block 320 is fixedly connected with the positioning rod 318, and the inside of the fixed cylinder 317 is provided with a spring. When the solution is applied to the door frame, the XYZ moving platform 31 moves the positioning column 37 to the direction of the door frame until the scraper 322 is in close contact with the door frame, the spring is compressed, the positioning rod 318 slides in the inside of the fixed cylinder 317, then the XYZ moving platform 31 moves in one direction, at this time, the scraper 322 located in the moving direction of the XYZ moving platform 31 is perpendicular to the door frame due to the limiting of the connecting frame 316 by the positioning groove 315, and the dust on the surface of the door frame is scraped off, the side of the scraper 322 facing the dust is arc-shaped, so that the dust can be pushed to the two sides of the door frame, so that the solution is not uneven due to the dust, and the other side of the scraper 322 rotates in the inside of the fixed rod 314 due to the limiting of the positioning groove 315, and is in close contact with the surface of the door frame only due to gravity, so that the solution is scraped flat by the scraper 322, avoiding the inaccuracy of laser detection caused by uneven distribution of the solution, when the scraper 322 needs to be replaced, the two sliding blocks 320 are extruded to the center, so that the positioning rod 318 is no longer limited by the sliding block 320, and the positioning rod 318 can be taken out from the inside of the fixed cylinder 317, facilitating the replacement of the scraper 322.

[0036] A passenger door frame size laser detection method for a passenger car comprises the following steps: S1: when the need to load, start lifting support 22, so that the lifting support 22 with the feed plate 21 down, until down to the appropriate position, so that the door frame can be directly pushed from the transfer car to the surface of the feed plate 21, and then start the lifting support 22 again so that the feed plate 21 and the working platform 11 are the same axis, and then make the third motor 23 connected to the external power supply and then start, the second screw 24 rotation will drive the linkage block 26 on the surface of the track 25 to move, thereby driving the first top plate 27, the door frame to the direction of the working platform 11, until the appropriate position, and then start the ball screw linear slide module 211, so that the threaded table of the ball screw linear slide module 211 drives the cylinder 212 to move into the door frame, and then make the cylinder 212 connected to the external power supply and then start, the output shaft of the cylinder 212 will extend upwards, until more than the upper surface of the working platform 11, and then make the threaded table of the ball screw linear slide module 211 move away from the feed plate 21, until it moves to the appropriate position, which is not the movement limit of the ball screw linear slide module 211, but makes the door frame between the two second clamping plates 113, and then retract the output shaft of the cylinder 212, which realizes the movement of the door frame again; S2: when the door frame is clamped and positioned, place the door frame on the surface of the working platform 11, and then make the first motor 12 connected to the external power supply and then start, the bidirectional screw 14 will be rotated, and the first silk block 112 connected with it will drive the connecting block 17 to move in the fixed frame 13, thereby making the two first clamping plates 16 close to each other, until the two first clamping plates 16 contact and extrude the door frame, forcing the door frame to move on the surface of the working platform 11, because the working platform 11 is made of steel, and in order to make the door frame move more smoothly, the surface of the working platform 11 will be cleaned and polished regularly, until the door frame is located at the center of the working platform 11, which realizes the preliminary positioning of the door frame, and then make the second motor 18 connected to the external power supply and then start, the first bevel gear 19 will drive the two second bevel gears 110 to make the two first lead screws 111 rotate, so that the two second silk blocks 114 will drive the two second clamping plates 113 to move closer to each other in the sliding slot, until they contact the door frame and push the door frame, because the first clamping plate 16 is used to correct the displacement of the door frame, it will not have high-strength clamping force on the door frame, and the surface of the first clamping plate 16 is relatively smooth, so the friction is small, therefore it will not have a large burden on the movement of the door frame, the movement of the second clamping plate 113 will finally push the door frame to the center of the working platform 11, which is convenient for the laser detector to measure, which realizes the positioning of the door frame; S3: After positioning the door frame, place the positioning column 37 to the appropriate position, then connect the water pipe 311 to the water pump 32, and then lock it through the clamp 36. When clamping the positioning column 37, due to the cooperation of the limiting block 323 and the clamp 36, the positioning column 37 will not rotate or disengage after being positioned. Then place the laser detector inside the installation slot 39, and then rotate the two knobs 38 to make the two clamping blocks 325 close to each other and clamp the laser detector. In order to prevent the light absorption of the door frame material from affecting the accuracy of laser detection, a layer of light-reflecting liquid needs to be applied to the surface of the door frame before detection. First, prepare a bucket of solution outside, then pump it into the water pipe 311 through the water pump 32, and then spray it onto the surface of the door frame through the spray head 312. By starting the XYZ moving platform 31, the positioning column 37 can move along the shape and size of the door frame; S4: When the door frame is coated with the solution, the XYZ moving platform 31 moves the positioning column 37 towards the door frame until the wiper 322 is in close contact with the door frame. The spring is compressed, and the positioning rod 318 slides inside the fixed cylinder 317. Then the XYZ moving platform 31 moves in one direction. At this time, the wiper 322 located in the moving direction of the XYZ moving platform 31 is perpendicular to the door frame due to the limiting of the positioning groove 315 on the connecting frame 316, and the dust on the surface of the door frame is scraped off. The side of the wiper 322 facing the dust is arc-shaped, which can push the dust to the two sides of the door frame, so that the coating solution will not be uneven due to dust. The other side of the wiper 322 will rotate inside the fixed rod 314 due to the limiting of the positioning groove 315, and only due to gravity and the surface of the door frame, the solution will be scraped flat by the wiper 322, avoiding inaccurate laser detection due to uneven distribution of the solution; S5: After the coating is completed, connect the installation slot 39 to the external power supply and start. The slot wheel 310 drives the Maltese cross 34 to rotate. Due to the cooperation of the shape of the slot wheel 310 and the Maltese cross 34, the Maltese cross 34 rotates by ninety degrees each time, until the Maltese cross 34 rotates one hundred and eighty degrees, so that the laser detector faces the door frame. Then move the laser detector along the size of the door frame through the XYZ moving platform 31 to the appropriate position for detection. If the door frame is deformed, it will cause the point to deviate, so as to detect whether the door frame meets the size standard, which realizes the detection of the door frame. After the detection is completed, clean the surface of the workbench 11 with an external cleaning brush plate. The solution on the surface of the door frame can be washed away with clean water; S6: when the door frame measurement is completed, the air cylinder 212 is moved to the outside of the door frame away from the discharging plate 21 through the ball screw linear slide module 211, then the door frame is limited through the air cylinder 212, and then the door frame is pushed to the direction of the discharging plate 21 through the ball screw linear slide module 211 until the door frame is pushed to a suitable position, so that the first top plate 27 and the second top plate 29 are inserted into the frame, so that the first top plate 27 and the second top plate 29 clamp the door frame, then the output shaft of the air cylinder 212 is retracted, then the third motor 23 is started, so that the first top plate 27 moves to the initial position, the second top plate 29 moves the door frame, until the door frame is moved to a suitable position, then the second top plate 29 is lifted, and the door frame is released, so that the door frame is discharged; S7: when the wiper 322 needs to be replaced, the two sliding blocks 320 are pressed to the center, so that the positioning rod 318 is no longer limited by the sliding block 320, so that the positioning rod 318 can be taken out from the inside of the fixed cylinder 317, and the wiper 322 is convenient to replace.

[0037] The technical features of the above embodiments can be combined in any manner. In order to make the description simple, all possible combinations of the technical features in the above embodiments are not described, but as long as the combinations of the technical features do not exist contradictory, they should be considered as the scope of the present application.

[0038] The above embodiments only express several embodiments of the present application, and the description is more specific and detailed, but it should not be understood as limiting the scope of the present application. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are within the scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A passenger car passenger door frame dimension laser detection device comprising a positioning assembly (1), characterized in that, The positioning assembly (1) includes a work platform (11), the surface of the work platform (11) is provided with a limiting mechanism for positioning the door frame, one side of the positioning assembly (1) is provided with a feeding assembly (2) for feeding, and the surface of the positioning assembly (1) is provided with an auxiliary display assembly (3) for assisting the laser detector.

2. A passenger door frame dimension laser detection device for a passenger vehicle as defined in claim 1, wherein, The limiting assembly includes a first motor (12) mounted on the bottom surface of the work platform (11), a bidirectional screw rod (14) is mounted on the output shaft of the first motor (12) through a shaft coupling, two first silk blocks (112) are symmetrically and threadedly connected to the surface of the bidirectional screw rod (14), two connecting rods (15) are fixedly connected to the surface of each first silk block (112), a plurality of fixed frames (13) are uniformly and fixedly connected to the bottom surface of the work platform (11), a connecting block (17) is arranged in each fixed frame (13), a sliding rail is arranged in each fixed frame (13), the connecting block (17) is slidably connected with the fixed frame (13) through the sliding rail, two first clamping plates (16) are symmetrically arranged on the top surface of the work platform (11), two connecting blocks (17) located on the same side penetrate the surface of the work platform (11) and are fixedly connected with the corresponding first clamping plate (16), and a positioning mechanism is arranged in the first clamping plate (16).

3. A passenger door frame dimension laser detection device for a passenger vehicle as defined in claim 2, wherein, The positioning mechanism includes a second motor (18) mounted on the surface of the first clamping plate (16), a first bevel gear (19) is mounted on the output shaft of the second motor (18) through a shaft coupling, two second bevel gears (110) are symmetrically and meshedly connected to the surface of the first bevel gear (19), a first lead screw (111) is fixedly connected to the surface of each second bevel gear (110), a sliding groove is formed in the first clamping plate (16), two second clamping plates (113) are symmetrically arranged in the sliding groove, each second clamping plate (113) is slidably connected with the first clamping plate (16) through the sliding groove, a second silk block (114) is fixedly connected to the surface of each second clamping plate (113), and the second silk block (114) is threadedly connected with the first lead screw (111).

4. A laser device for measuring the dimensions of a passenger door frame of a passenger vehicle as recited in claim 1, wherein, The feeding assembly (2) comprises a lifting support (22) arranged on one side of the working platform (11), a feeding plate (21) is installed at the top end of the lifting support (22), a third motor (23) is installed on the bottom surface of the feeding plate (21), a second lead screw (24) is installed on the output shaft of the third motor (23) through a shaft coupling, a linkage block (26) is threadedly connected to the surface of the second lead screw (24), a rail (25) is installed on the top surface of the feeding plate (21), the linkage block (26) is slidably connected with the rail (25), a first top plate (27) is fixedly connected to the surface of the linkage block (26), a fixing frame (28) is fixedly connected to the surface of the first top plate (27), a pull block (210) is slidably connected in the fixing frame (28), a second top plate (29) is fixedly connected to one end of the pull block (210) close to the feeding plate (21), and a transfer mechanism for conveying the door frame to a suitable position is arranged on the bottom surface of the working platform (11).

5. A bus passenger door frame dimension laser detection device according to claim 4, wherein, The transfer mechanism comprises a ball screw linear slide module (211) installed on the bottom surface of the working platform (11), and a cylinder (212) is installed on the threaded table surface of the ball screw linear slide module (211), penetrates the surface of the working platform (11), and is slidably connected with the surface.

6. A bus passenger door frame dimension laser detection device according to claim 1, characterized in that, The auxiliary display assembly (3) comprises an XYZ moving platform (31), a mounting plate (33) is fixedly connected to the surface of the XYZ moving platform (31), a Malta cross (34) is rotatably connected to the surface of the mounting plate (33) through a bearing, an installation groove (39) is installed on the surface of the XYZ moving platform (31), a groove wheel (310) is installed on the output shaft of the installation groove (39), the groove wheel (310) and the Malta cross (34) are mutually fitted, a positioning plate (35) is fixedly connected to the side of the Malta cross (34) away from the mounting plate (33), a clamp (36) is arranged on the side of the positioning plate (35) away from the Malta cross (34), a positioning column (37) is arranged between the positioning plate (35) and the clamp (36), an installation groove (39) is formed in one end of the positioning column (37), two clamping blocks (325) are symmetrically arranged in the installation groove (39), two knobs (38) are symmetrically arranged on the surface of the positioning column (37), the two knobs (38) penetrate the surface of the positioning column (37) and are threadedly connected with the clamping blocks (325), and a liquid coating mechanism for improving the laser detection accuracy is arranged on one end of the positioning column (37).

7. A bus passenger door frame dimension laser detection device according to claim 6, wherein, The surface of the positioning column (37) is fixedly connected with a limiting block (323), and the limiting block (323) and the clamp (36) are mutually fitted.

8. A bus passenger door frame dimension laser detection device according to claim 6, wherein, The coating liquid mechanism includes a water pump (32) installed on the surface of the XYZ moving platform (31), an output end of the water pump (32) is provided with a water pipe (311), the water pipe (311) penetrates through the mounting plate (33), the Malta cross (34) and the positioning plate (35) respectively, and is inserted into the inside of the positioning column (37), the inside of the positioning column (37) is provided with a limiting ring (324), one end of the water pipe (311) inserted into the inside of the positioning column (37) is provided with a clamping groove (319) matched with the limiting ring (324), the limiting ring (324) is rotatably connected with the water pipe (311) through the clamping groove (319), and the positioning column (37) is provided with a spraying head (312) at one end away from the mounting groove (39), and the positioning column (37) is provided with a cleaning mechanism at one end.

9. A bus passenger door frame dimension laser detection device according to claim 8, characterized in that, The cleaning mechanism includes a positioning ring (313) fixedly connected to one end of the positioning column (37), a plurality of fixed rods (314) are uniformly and fixedly connected to the surface of the positioning ring (313), a connecting frame (316) is rotatably connected to one end of each fixed rod (314) away from the positioning ring (313), a positioning groove (315) is formed in the position corresponding to the connecting frame (316) of the positioning column (37), one end of the connecting frame (316) is inserted into the inside of the positioning groove (315), two fixed cylinders (317) are fixedly connected to one end of the connecting frame (316) away from the positioning column (37), a positioning rod (318) is slidably connected to the inside of each fixed cylinder (317), a scraping piece (322) is fixedly connected to one end of the positioning rod (318) away from the fixed cylinder (317), two through grooves (321) are symmetrically formed in the surface of the fixed cylinder (317), a sliding block (320) is arranged in the inside of each through groove (321), the sliding block (320) is slidably connected with the fixed cylinder (317) through the through groove (321), the sliding block (320) is fixedly connected with the positioning rod (318), and the inside of the fixed cylinder (317) is provided with a spring.

10. A method for detecting the size of a passenger door frame of a passenger vehicle by laser, which is suitable for a device for detecting the size of a passenger door frame of a passenger vehicle by laser as claimed in any one of claims 1 to 9, characterized in that, The method comprises the following steps: S1: When the material needs to be loaded, start the lifting support (22) to make the lifting support (22) drive the material placing plate (21) to descend until it reaches the appropriate position, so that the door frame can be directly pushed onto the surface of the material placing plate (21) from the transfer trolley, then start the lifting support (22) again to make the material placing plate (21) have the same axis as the working platform (11), then connect the third motor (23) to the external power supply and start it, the rotation of the second lead screw (24) will drive the linkage block (26) to move on the surface of the track (25), thereby driving the first top plate (27) to push the door frame in the direction of the working platform (11) until it reaches the appropriate position, then start the ball screw linear slide module (211) to make the threaded table of the ball screw linear slide module (211) drive the cylinder (212) to move into the door frame, then connect the cylinder (212) to the external power supply and start it, the output shaft of the cylinder (212) will extend upwards until it exceeds the upper surface of the working platform (11), then move the threaded table of the ball screw linear slide module (211) away from the material placing plate (21) until it reaches the appropriate position, which is not the movement limit of the ball screw linear slide module (211), but to make the door frame located between the two second clamping plates (113), then retract the output shaft of the cylinder (212) to achieve the repositioning of the door frame; S2: When the door frame is clamped and positioned, place the door frame on the surface of the working platform (11), then connect the first motor (12) to the external power supply and start it, the bidirectional screw rod (14) will be rotated, the first silk block (112) connected with it will drive the connecting block (17) to move in the fixed frame (13) through the connecting rod (15), thereby making the two first clamping plates (16) approach each other until they contact and press the door frame, forcing the door frame to move on the surface of the working platform (11), since the working platform (11) is made of steel, and in order to make the door frame move smoothly, the surface of the working platform (11) will be regularly cleaned and polished until the door frame is located at the center of the working platform (11), thus achieving the preliminary positioning of the door frame, then connect the second motor (18) to the external power supply and start it, the first bevel gear (19) will drive the two second bevel gears (110) to make the two first lead screws (111) rotate, making the two second silk blocks (114) drive the two second clamping plates (113) to approach each other in the sliding slot, until they contact the door frame and push it, since the function of the first clamping plate (16) is to correct the displacement of the door frame, it will not apply high-strength clamping force to the door frame, and the surface of the first clamping plate (16) is relatively smooth, thus the friction is small, so it will not put too much burden on the movement of the door frame, the movement of the second clamping plate (113) will finally push the door frame to the center of the working platform (11), making it convenient for the laser detector to measure, thus achieving the positioning of the door frame; S3: After positioning the door frame, place the positioning column (37) in the appropriate position, then connect the water pipe (311) to the water pump (32), and then lock it with the clamp (36). When clamping the positioning column (37), due to the cooperation of the limiting block (323) and the clamp (36), the positioning column (37) will not rotate or disengage after being positioned. Then place the laser detector inside the installation slot (39), and then rotate the two knobs (38) to make the two clamping blocks (325) approach each other and clamp the laser detector. In order to prevent the light absorption of the door frame material from affecting the accuracy of laser detection, a layer of light liquid needs to be applied to the surface of the door frame before detection. First, mix a bucket of solution outside, then suck it into the water pipe (311) through the water pump (32), and then spray it onto the surface of the door frame through the spray head (312). By starting the XYZ moving platform (31), the positioning column (37) can move along the size of the door frame; S4: When the door frame is coated with solution, the XYZ moving platform (31) will move the positioning column (37) towards the door frame until the wiper (322) is in close contact with the door frame. The spring will be compressed and the positioning rod (318) will slide inside the fixed cylinder (317). Then the XYZ moving platform (31) moves in one direction. At this time, the wiper (322) located in the moving direction of the XYZ moving platform (31) will be perpendicular to the door frame due to the limiting of the positioning groove (315) to the connecting frame (316), and will scrape off the dust on the surface of the door frame. The side of the wiper (322) facing the dust is arc-shaped, which can push the dust to the two sides of the door frame, so that the solution is not uneven when it is applied. The other side of the wiper (322) will rotate inside the fixed rod (314) due to the limiting of the positioning groove (315), and only due to gravity will it be in close contact with the surface of the door frame. The sprayed solution will be scraped flat by the wiper (322), avoiding inaccurate laser detection due to uneven distribution of the solution; S5: After the coating is completed, connect the installation slot (39) to the external power supply and then start it. The groove wheel (310) will drive the Maltese cross (34) to rotate. Due to the cooperation of the groove wheel (310) and the Maltese cross (34), the Maltese cross (34) will rotate by ninety degrees each time until it rotates one hundred and eighty degrees, so that the laser detector faces the door frame. Then move the laser detector along the size of the door frame by the XYZ moving platform (31) to the appropriate position for detection. If the door frame is deformed, it will cause the point to deviate, so as to detect whether the door frame meets the size standard, which realizes the detection of the door frame. After the detection is completed, clean the surface of the workbench (11) with an external cleaning brush. The solution on the surface of the door frame can be washed off with clean water. S6: When the door frame measurement is completed, the ball screw linear slide module (211) moves the air cylinder (212) to the outside of the door frame away from the discharging plate (21), then the air cylinder (212) limits the door frame, and then the ball screw linear slide module (211) pushes the door frame to the direction of the discharging plate (21) until it is pushed to a suitable position, so that the first top plate (27) and one side of the door frame are mutually attached, and the second top plate (29) is inserted into the frame, so that the first top plate (27) and the second top plate (29) clamp the door frame, then the output shaft of the air cylinder (212) is retracted, then the third motor (23) is started, so that the first top plate (27) moves to the initial position, the second top plate (29) drives the door frame to move until it moves to a suitable position, then the second top plate (29) is lifted, and the door frame is released, so that the door frame is discharged; S7: When the wiper (322) needs to be replaced, the two sliders (320) are pressed towards the center, so that the positioning rod (318) is no longer limited by the sliders (320), and the positioning rod (318) can be taken out from the inside of the fixed cylinder (317), facilitating replacement of the wiper (322).

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