CN220170175U

CN220170175U - Automatic detection device for length and form and position tolerance of longitudinal I-shaped aluminum guide rail

Info

Publication number: CN220170175U
Application number: CN202321593947.9U
Authority: CN
Inventors: 王昌; 郑守东; 张大维; 向德宇; 唐晓东; 崔宁; 陈伟; 马超; 刘志慧; 陈欣
Original assignee: Liaoning Zhongwang Machinery Equipment Manufacturing Co Ltd
Current assignee: Liaoning Zhongwang Machinery Equipment Manufacturing Co Ltd
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2023-12-12
Anticipated expiration: 2033-06-21

Abstract

The utility model belongs to the technical field of length and form and position tolerance detection tools, and particularly relates to an automatic detection device for the length and form and position tolerance of a longitudinal I-shaped aluminum guide rail, which comprises an upper and lower material lifting synchronous belt conveying line, a detection fixing platform, a servo positioning mechanism and a data acquisition mechanism; and the detection fixed platform is provided with a feeding and discharging lifting synchronous belt conveying line and a servo positioning mechanism, and the servo positioning mechanism is provided with a data acquisition mechanism. The technical scheme can rapidly and accurately identify and judge the length and the surface form and position tolerance of the longitudinal I-shaped aluminum guide rail, solves the problem of false detection caused by inaccurate detection reference compared with a manual measurement method, and shortens the detection time from original 100 s/piece to 30 s/piece. The scheme realizes the recognition scheme of the length and the form and position tolerance of the longitudinal I-shaped aluminum guide rail with high speed, accuracy, safety and reliability, and fills the blank of intelligent recognition of machines in the field.

Description

Automatic detection device for length and form and position tolerance of longitudinal I-shaped aluminum guide rail

Technical Field

The utility model belongs to the technical field of length and form and position tolerance detection tools, and particularly relates to an automatic detection device for the length and form and position tolerance of a longitudinal I-shaped aluminum guide rail.

Background

Along with the development of the times, the I-shaped aluminum guide rail is increasingly widely applied to the battery pack frame of the new energy automobile, fully shows the importance of high strength and light weight, and particularly in the high-end new energy automobile, the application degree of the I-shaped aluminum guide rail is increasingly higher on the premise that the country supports the development of new energy. Because of the high requirements of the products, the method is also a great challenge for manufacturers, and the detection of the manufactured products is an important link. Even if the manufacturers have professional detection equipment, a product is required to be detected for a long time, the method is not suitable for mass production of the product, most manufacturers basically adopt a manual detection method, so that the efficiency is low, the accuracy is difficult to ensure, the interference result of external factors is large, the productivity is difficult to ensure, and the daily statistics, the qualification rate and the problem of unqualified products are all very large, and the statistics of the problems is very large.

Disclosure of Invention

The utility model aims to provide an automatic detection device for the length and the form and position tolerance of a longitudinal I-shaped aluminum guide rail, which is used for collecting three-dimensional coordinate data of a specified point of a workpiece, feeding back the three-dimensional coordinate data to a computer to calculate the length and the form and position tolerance of a section bar, rapidly identifying whether the length and the form and position tolerance of the longitudinal I-shaped aluminum guide rail are qualified or not, displaying the yield and daily output on a screen, outputting statistical results, improving the accuracy and greatly improving the production efficiency.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the automatic detection device for the length and the form and position tolerance of the longitudinal I-shaped aluminum guide rail comprises a feeding and discharging lifting synchronous belt conveying line, a detection fixing platform, a servo positioning mechanism and a data acquisition mechanism;

the detection fixing platform comprises a workbench, a lifting cylinder is arranged on a supporting frame of the workbench, an upper and lower material lifting synchronous belt conveying line is arranged on the lifting cylinder, a fixing support is symmetrically arranged at the top of the workbench, a side cylinder is arranged on the fixing support, a side backup plate I is arranged at the end part of a piston rod of the side cylinder, a reference block and a side reference block are sequentially arranged on a platform plate at the front end of the side backup plate I, an air hole is formed in the center position of the reference block, a digital position sensor is arranged on the reference block, a square hole is formed in one end of the top of the workbench, the top of the adjustable horizontal support is positioned at the square hole, a laser displacement sensor is arranged at the top of the adjustable horizontal support, an end face cylinder which is parallel to the laser displacement sensor is arranged on the workbench, a side backup plate II is arranged at the end part of the piston rod of the end face cylinder, and an end face reference block and a reference correction block are sequentially fixedly arranged at the other end of the top of the workbench through bolts; the servo positioning mechanism is arranged on the workbench, and the data acquisition mechanism is arranged on the servo positioning mechanism.

The stand bottom of support frame is installed respectively and is adjusted the lower margin, and the pole portion and the spacing card one end of adjustment lower margin are connected, and expansion bolts are installed to spacing card other end, and detection fixed platform passes through adjustment lower margin, spacing card and expansion bolts installs subaerial in the level.

The adjustable horizontal bracket comprises a top supporting plate and a supporting column, wherein the top end of the supporting column is welded with a supporting plate, the supporting plate is used for installing a laser displacement sensor, a base plate is installed at the bottom end of the supporting column, rib plates are welded between the base plate and four side walls of the supporting column, adjustable feet are installed at four corners of the base plate, the adjustable feet are connected with one end of a limiting clamping piece, and the other end of the limiting clamping piece is fixed on the horizontal ground through an expansion bolt.

The lifting synchronous belt conveying line comprises a base, aluminum beams are installed at the tops of the outer sides of vertical plates at two ends of the base through bolts, pressing plates are symmetrically installed at two ends of each aluminum beam, limiting blocks are connected to the tops of the two pressing plates through bolts, a transmission shaft is arranged at one end between the two aluminum beams, two ends of the transmission shaft are respectively installed in a rotating mode through the bearings and the corresponding pressing plates on the aluminum beams, belt wheels I are respectively arranged between the two pressing plates at two ends of the transmission shaft through keys, shafts are respectively installed between the pressing plates at the other ends of the two aluminum beams through bearings, belt wheels II are connected to the belt shafts through keys, synchronous belts are installed on the belt wheels I and the belt wheels II which are located on the same aluminum beam, a speed regulating motor is installed on the base through bolts, a chain wheel II is installed between the output shaft of the speed regulating motor and the support through keys, a chain wheel II is installed on the chain wheel II and the chain wheel I, a clamping jaw cylinder is opposite to the speed regulating motor through bolts, a switch bracket I and a switch bracket II are respectively installed on the side walls of the base, and a clamping jaw I is installed on the switch bracket.

The servo positioning mechanism comprises a main beam fixed on a workbench, one end of the upper surface of the main beam and the side wall of the main beam are respectively provided with a linear guide rail I and a linear guide rail II, a rack is arranged on the main beam on one side of the linear guide rail I, the linear guide rail II and the rack are all arranged along the length direction of the main beam, the height of the rack is lower than that of the linear guide rail I, the moving platform consists of a horizontal plate and a vertical plate welded at one end of the horizontal plate, the moving platform is slidably mounted on the linear guide rail I and the linear guide rail II, the horizontal plate of the moving platform is fixedly connected with a sliding block on the linear guide rail I, one end of the horizontal plate of the moving platform is provided with a drag chain fixing frame, the other end of the drag chain is fixed at the end of the extension plate of the main beam, the other end of the horizontal plate of the moving platform is provided with a servo speed reducing motor, the output shaft of the servo speed reducing motor penetrates through the plate of the moving platform and is connected with a gear matched with the rack through a key, and the vertical plate of the moving platform is provided with a connecting plate, and the data acquisition mechanism is mounted on the vertical plate of the moving platform through a connecting plate.

The data acquisition mechanism comprises a fixed base which is connected with a connecting plate on the mobile platform through bolts, the lower surface of the fixed base is arranged on the workbench through a supporting seat, lateral probe mounting plates are respectively arranged on the lower surface of the fixed base, and lateral contact sensors are respectively arranged on the two lateral probe mounting plates; the upper contact type sensor is arranged on the fixed base, the detection end of the lateral contact type sensor and the detection end of the upper contact type sensor respectively penetrate through the through holes on the lateral probe mounting plate and the fixed base, and the probe protection plate is respectively arranged at the end parts.

The utility model has the technical effects that:

according to the automatic detection device developed aiming at the detection requirements of the length and the form and position tolerance of the longitudinal I-shaped aluminum guide rail, a product establishes a space three-dimensional coordinate system based on a standard block on the basis of conventional detection according to the control requirements of the length, the flatness, the perpendicularity, the contour degree and the like of the longitudinal I-shaped aluminum guide rail, a contact displacement sensor and a laser sensor are used for collecting data of a specified point of a workpiece, a least square method is used for fitting an A reference surface of the workpiece, the three-dimensional coordinate is used for calculating the data of the integral flatness, the regional flatness, the perpendicularity, the contour degree and the like of a section bar, the detection accuracy is improved, the detection efficiency is guaranteed, and the defects of low detection efficiency, unstable accuracy and the like of the product are overcome.

The technical scheme can quickly and accurately identify and judge the length and the surface form and position tolerance of the longitudinal I-shaped aluminum guide rail, compared with a manual measurement method, solves the problem of false detection caused by inaccurate detection reference (the manual detection is to take a detection platform as an A reference surface, but the process requirement is to take a surface with a virtual designated point on a thin wall surface of a section bar as the A reference surface, and the detection deviation of verticality and profile degree is finally caused due to different selection of the A reference surface), and shortens the detection time from 100 s/piece to 30 s/piece.

The utility model can also meet the requirement that the detection report is generated in real time for tracing in the subsequent normal use process of the user, and can also count daily detection quantity, yield and the like. The recognition scheme of the length and the form and position tolerance of the longitudinal I-shaped aluminum guide rail with high speed, accuracy, safety and reliability is realized, and the gap of intelligent recognition of machines in the field is filled.

Drawings

FIG. 1 is a schematic diagram of an automatic detection device for length and form and position tolerance of a longitudinal I-shaped aluminum guide rail;

FIG. 2 is a schematic diagram of a detection fixing platform of the automatic detection device for the length and form and position tolerance of the longitudinal I-shaped aluminum guide rail;

FIG. 3 is a schematic view of a part of a detection fixing platform of the automatic detection device for the length and form and position tolerance of the longitudinal I-shaped aluminum guide rail;

FIG. 4 is a schematic view of a servo positioning mechanism of an automatic detection device for length and form and position tolerance of a longitudinal I-shaped aluminum guide rail;

FIG. 5 is a side view of a servo positioning mechanism of the automatic longitudinal I-shaped aluminum guide rail length and form and position tolerance detection device of the utility model;

FIG. 6 is a schematic diagram of a conveying line of an up-down lifting synchronous belt of the automatic detection device for the length and form and position tolerance of the longitudinal I-shaped aluminum guide rail;

FIG. 7 is a schematic diagram of a data acquisition mechanism of the automatic detection device for length and form and position tolerance of the longitudinal I-shaped aluminum guide rail;

FIG. 8 is a schematic view of a longitudinal I-shaped aluminum rail;

1-feeding and discharging lifting synchronous belt conveying lines; 2-detecting a fixed platform; 3-a servo positioning mechanism; 4-a data acquisition mechanism; the device comprises a 5-transmission shaft, a 6-limited block, a 7-synchronous belt, an 8-pressing plate, a 9-aluminum beam, a 10-base, a 11-switch bracket I, a 12-belt pulley I, a 14-switch bracket II, a 15-clamping jaw cylinder, a 16-speed regulating motor, a 17-chain wheel II, a 18-chain, a 19-chain wheel II, a 20-workbench, a 21-side base block, a 22-reference block, a 23-side backing plate I, a 24-side cylinder, a 25-fixed bracket, a 26-lifting cylinder, a 27-end surface reference block, a 28-reference correction block, a 29-adjusting foot, a 30-limiting card, a 31-expansion bolt, a 32-side backing plate II, a 33-end surface cylinder, a 34-laser displacement sensor, a 35-adjustable horizontal bracket, a 36-main beam, a 37-rack, a 38-linear guide rail I, a 39-towing chain fixing frame, a 40-pressure regulating valve, a 42-pneumatic fixing frame, a 43-servo speed reducing motor, a 44-tensioning adjustment block, a 45-connecting plate, a 46-moving platform, a 48-gear, a 49-fixed base, a 50-side probe, a side contact mounting plate, a 51-side contact mounting plate, a 52-contact sensor, a 52-side-contact type upper sensor, a protection plate, a 53-contact sensor.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples.

The automatic detection device for the length and the form and position tolerance of the longitudinal I-shaped aluminum guide rail comprises an upper and lower lifting synchronous belt conveying line 1, a detection fixing platform 2, a servo positioning mechanism 3 and a data acquisition mechanism 4, as shown in fig. 1;

as shown in fig. 6, the feeding and discharging synchronous belt conveyor line 1, which completes the feeding and discharging and positioning of the workpiece by the feeding and discharging synchronous belt conveyor line 1, comprises a base 10, two aluminum beams 9 are arranged at the top of the outer side of a vertical plate at two ends of the base 10 by bolts, two pressing plates 8 are symmetrically arranged at two ends of each aluminum beam 9, a limiting block 6 is connected at the top of each pressing plate 8 by bolts, a transmission shaft 5 is arranged at one end between the two aluminum beams 9, two ends of the transmission shaft 5 are respectively rotatably arranged with the pressing plates 8 on the corresponding aluminum beams 9 by bearings, belt shafts are respectively arranged between the pressing plates 8 at two ends of the transmission shaft 5 by keys, belt pulleys II are respectively connected on the belt shafts by keys, the synchronous belt 7 is arranged on a belt wheel I12 and a belt wheel II which are positioned on the same aluminum beam 9, the speed regulating motor 16 is arranged on the base 10 through bolts, an output shaft of the speed regulating motor 16 penetrates through a support on the base, a chain wheel I17 is connected to the tail end of the speed regulating motor through a key, a bearing is arranged between the output shaft of the speed regulating motor 16 and the support, a chain wheel II 19 is connected to the transmission shaft 5 through a key, a chain 18 is arranged on the chain wheel II 19 and the chain wheel I17, a clamping jaw cylinder 15 is connected to the side wall of the base 10 through bolts, the clamping jaw cylinder 15 and the speed regulating motor 16 are opposite to each other, a switch bracket I11 and a switch bracket II 14 are respectively arranged on two clamping jaws of the clamping jaw cylinder 15, and a proximity switch is respectively arranged on the switch bracket I11 and the switch bracket II 14.

The output shaft of the speed regulating motor 16 rotates to drive the chain wheel I17 to rotate, the chain 18 drives the chain wheel II 19 and the transmission shaft 5 to rotate, the transmission shaft 5 drives the belt wheel I to rotate, the synchronous belt 7 is driven to move on the aluminum beam 9, and the belt wheel I, the belt wheel II 12 and the transmission shaft 5 are fixedly finished by means of the installation pressing plate 8. In the transmission process of the workpiece, the clamping jaw air cylinder 15 is opened and closed, the switch support I11 is driven to swing up and down to detect whether the workpiece is in place or not through a proximity switch on the clamping jaw air cylinder, the switch support II 14 detects whether the workpiece moves in place or not in the blanking process through the proximity switch on the switch support II, and signals are fed back to the lifting air cylinder 26.

As shown in fig. 2 and 3, the detection fixing platform 2 is a workpiece detection fixing platform, and comprises a workbench 20, the workbench 20 comprises two supporting frames, the tops of the two supporting frames are respectively provided with a platform plate, the two supporting frames are connected into a whole through a connecting beam and a supporting rib, lifting cylinders 26 are respectively arranged on the side walls of the connecting beam longitudinal beams of the two supporting frames, the lifting cylinders 26 are positioned between the two connecting beams, the feeding and discharging lifting synchronous belt conveying line 1 is arranged at the end part of a piston rod of the lifting cylinder 26 of the detection fixing platform 2 through a base 10, the tops of the two platform plates are respectively provided with a fixing bracket 25 close to one side of the connecting beam, the fixing bracket 25 is provided with a side cylinder 24, the end part of the piston rod of the side cylinder 24 is provided with a side backup plate i 23, the front end platform plate of the side backup plate is sequentially provided with a reference block 22 and a side reference block 21, an air hole is formed in the center position of the reference block 22, a digital position sensor is arranged on the reference block 22, the digital displacement sensor can feed back a gap between a workpiece and the reference block 22 according to the leakage amount of gas, and then whether the workpiece is placed smoothly or not is judged, and when the workpiece is in close to the reference block 22 is attached tightly, otherwise, the leakage amount is small. One of the platform plates is provided with a square hole, the square hole is arranged far away from one side of the connecting beam, the top end of the adjustable horizontal support 35 is positioned at the square hole, the top of the adjustable horizontal support is provided with a laser displacement sensor 34, the length of a workpiece is detected through the laser displacement sensor 34, the platform plate is provided with an end face cylinder 33 which is arranged in parallel with the laser displacement sensor 34, the end face cylinder 33 is provided with a side backup plate II 32 at the end part of a piston rod, and the other platform plate is fixedly provided with an end face reference block 27 and a reference correction block 28 sequentially through bolts.

The stand bottom of support frame is installed respectively and is adjusted lower margin 29, and the pole portion and the spacing card 30 one end of adjustment lower margin 29 are connected, and expansion bolts 31 are installed to spacing card 30 other end, and detection fixed platform 2 passes through adjustment lower margin 29, spacing card 30 and expansion bolts 31 installs subaerial in the level, and spacing card 30 is the zigzag.

The adjustable horizontal bracket 35 comprises a top supporting plate and a supporting column, the top end of the supporting column is welded with a supporting plate, the supporting plate is used for installing a laser displacement sensor 34, a base plate is installed at the bottom end of the supporting column, rib plates are welded between the base plate and four side walls of the supporting column, adjustable feet 29 are installed at four corners of the base plate, the adjustable feet 29 are connected with one end of a limit clamping piece 30, and the other end of the limit clamping piece 30 is fixed on the horizontal ground through an expansion bolt 31.

The lifting cylinder 26 descends to drop the workpiece on the reference block 22, the lower reference of the detection fixing platform is ensured by two reference blocks 22, the upper part of each reference block 22 is provided with an air hole, each reference block 22 is respectively connected with a group of digital position sensors, when the workpiece is placed in place, the side backup plate I23 is driven by the side cylinder 24 to enable the workpiece to lean against the side reference block 21, and the side backup plate II 32 is driven by the end face cylinder 33 to lean against the workpiece on the end face reference block 27, and the distance of the side backup plate II 32 is detected by the laser displacement sensor 34 to feed back the actual length of the workpiece.

As shown in fig. 4 and 5, the servo positioning mechanism 3 is a servo walking assembly, and mainly completes the walking positioning function of the data acquisition mechanism 4; the device comprises a main beam 36 fixed on a workbench, wherein one end of the upper surface of the main beam 36 and the side wall of the main beam 36 are respectively provided with a linear guide I38 and a linear guide II, one side of the main beam 36 of the linear guide I38 is provided with a rack 37, the linear guide I38, the linear guide II and the rack 37 are all arranged along the length direction of the main beam 36, the height of the rack 37 is lower than that of the linear guide I38, a moving platform 46 consists of a horizontal plate and a vertical plate welded at one end of the horizontal plate, the moving platform 46 is slidably arranged on the linear guide I38 and the linear guide II, the horizontal plate of the moving platform is fixedly connected with a sliding block on the linear guide I38, one end of the horizontal plate of the moving platform 46 is provided with a drag chain fixing frame 39 and a pneumatic fixing frame 42 which is parallel to the drag chain fixing frame 39, the pneumatic fixing frame 42 is provided with a pressure regulating valve 40 and an electromagnetic valve, the other end of the drag chain is fixed at the end of the extension plate of the main beam, the other end of the moving platform 46 is provided with a servo speed reducing motor 43, an output shaft of the servo motor 43 is arranged on a machine seat, the horizontal plate of the servo speed reducing motor is provided with a long hole at the position of the adjusting motor is welded at one end of the horizontal plate, the seat is slidably arranged on the vertical plate is in the sliding fit with the top of the vertical speed reducing motor 43, and the top of the screw bolt 48 is also in tight fit with the end of the rack 43 through the screw bolt 48, which is tightly matched with the horizontal speed reducing block 43, and the top of the screw gear 43 is tightly arranged at the top of the speed reducing motor 43, which is tightly-adjustable screw, and the screw is guaranteed. The limit of the position and the size in debugging operation is ensured by means of the tensioning adjusting block 44, the connecting plate 45 is arranged on the vertical plate of the mobile platform 46, the data acquisition mechanism 4 is arranged through the connecting plate 45, and the stability of data acquisition and the accuracy of the walking position in the walking process are ensured by means of the components.

As shown in fig. 7, the data acquisition mechanism 4 is a core position of the whole device and is used for data acquisition, and comprises a fixed base 49 connected with a connecting plate 45 on a mobile platform 46 through bolts, wherein the lower surface of the fixed base 49 is installed on a workbench 20 through a supporting seat, lateral probe mounting plates 50 are respectively installed on the lower surface of the fixed base 49, lateral contact sensors 51 are respectively installed on the two lateral probe mounting plates 50, the difficulty of overall processing and installation size is high, and the installation is required to ensure that the reference position has no deviation; the upper contact sensor 52 is installed on the fixed base 49, the detection end of the upper contact sensor 52 passes through the fixed base 49, the detection end of the lateral contact sensor 51 and the detection end of the upper contact sensor 52 respectively pass through the through holes on the lateral probe mounting plate 50 and the fixed base 49, the end parts are respectively provided with the probe protection plate 53, the upper contact sensor 52 and the lateral contact sensor 51 are eight groups, no dead angle is ensured in acquisition and measurement, and the lateral contact sensor 51 and the upper contact sensor 52 are digital contact sensors in the embodiment, and the model is GT-A22.

The automatic detection device for the length and form and position tolerance of the longitudinal I-shaped aluminum guide rail has the working principle that:

as shown in fig. 8, when the workpiece is not placed on the feeding and discharging lifting synchronous belt conveying line 1, the data acquisition mechanism 4 is positioned at the starting position, and the synchronous belt of the feeding and discharging lifting synchronous belt conveying line 1 is positioned at the low point; the workpiece is placed on the lifting synchronous belt conveyor line 1 in the lifting state, the workpiece is conveyed to the position above the reference block 22 through the lifting cylinder 26 and the movement of the synchronous belt, whether the workpiece is above the reference block 22 or not is detected through the proximity switch on the switch support I11 and the switch support II 14, when the proximity switch detects that the workpiece is above the reference block 22, a detected signal is fed back to a computer, the computer controls the speed regulating motor 16 on the lifting synchronous belt conveyor line 1 to stop working and simultaneously sends an instruction to the lifting cylinder 26, the piston rod of the lifting cylinder 26 is retracted to enable the lifting synchronous belt conveyor line 1 to descend to a low point, at the moment, the workpiece is placed on the reference block 22 of the detection platform 2, a magnetic switch on the lifting cylinder 26 is triggered when the lifting cylinder 26 descends to the low point, a magnetic switch feedback signal is fed to the computer, and the computer controls the side cylinder 24 and the end face cylinder 33 to enable the workpiece to be abutted to the side reference block 21 and the end face reference block 27. At this time, if the workpiece is not placed flat or in place, the digital position sensor on the reference block 22 will send an alarm and feed back an alarm signal to the computer, when the detection principle is that the workpiece is not placed or a larger gap exists, the small hole on the upper part of the reference block 22 is in a long air outlet state, after the workpiece is placed in place, the air hole is blocked or a trace amount of air flows out, and the air leakage amount and the gap conversion value can be set to ensure that the requirement of the workpiece placement flatness needs to be met. When the workpiece is placed without errors and the end face cylinder 33 is in a close state, the laser displacement sensor 34 can detect the walking distance of the side backup plate II 32 and feed back to the computer, and when the workpiece is installed, the installation position of the laser displacement sensor 34 is already detected and fixed according to the standard workpiece. The above steps confirm that there is no error, and the computer sends an instruction to the servo speed reduction motor 43 of the servo positioning mechanism 3 to drive the data acquisition mechanism 4 to move above the workpiece.

According to the detection requirement of the workpiece, 8 acquisition points are set in a computer, in the detection process, each acquisition point computer controls a servo speed reducing motor 43 to stop working, simultaneously sends instructions to an upper contact sensor 52 and a lateral contact sensor 51, at the moment, the upper contact sensor 52 and the lateral contact sensor 51 extend out to be in contact with the workpiece, 8 groups of contact sensors are used, each time stopping, the contact sensors extend out to acquire data, each time acquiring is carried out, the data of acquisition coordinate points are recorded, the acquired data are transmitted to the computer after the whole workpiece is completely acquired, meanwhile, the computer controls a servo positioning mechanism 3 to move to an initial position, and the computer carries out the calculation of a least square method according to the fed back data to output whether the flatness, the perpendicularity, the contour degree and other geometric tolerances of the detection surface are qualified or not, and the data of the acquisition points can be displayed. And correction, inspection and comparison can be ensured when judging errors occur in the later period.

When the workpiece is detected, the computer sends instructions to the side air cylinder 24, the end face air cylinder 33 and the lifting air cylinder 26, the side air cylinder 24 and the end face air cylinder 33 are all loosened, the piston rod of the lifting air cylinder 26 stretches out to jack up the feeding and discharging lifting synchronous belt conveying line 1, after the workpiece is separated from the position of the detection reference block 22, the digital position sensor detects that no workpiece exists on the reference block 22, a feedback signal is sent to the computer, the computer sends instructions to the speed regulating motor 16, and the speed regulating motor 16 drives the synchronous belt to operate to convey the workpiece to a discharging area.

In the above detection process, when the workpiece is not placed in place or inclined, the next action is not performed in the detection, the lifting cylinder 26 jacks up the feeding and discharging lifting synchronous belt conveying line 1, and the workpiece is conveyed to the discharging area to be rechecked. When the workpiece is placed without errors, the length detection is out of tolerance, the lifting cylinder 26 jacks up the feeding and discharging lifting synchronous belt conveying line 1, and the workpiece is conveyed to a discharging area to be rechecked.

In the detection process, every 500 parts are detected, the position of the contact sensor can be automatically corrected, if the corrected data are found to deviate from the original setting, the correction can be tested again, the deviation exceeds the setting range continuously twice, the current position can be automatically reset to be zero point, and thus the phenomenon of false detection of products caused by loose use of parts in the long-term use process is avoided.

The position correction of the touch sensor is specifically: the data acquisition mechanism 4 can automatically stop to the position of the reference block 22 under the drive of the servo positioning mechanism 3, and eight groups of contact sensors extend out to be in contact with the reference block 22, and after the contact sensors are in contact with the reference block 22, the contact sensors can take the surface of the reference block 22 as zero points to clear the zero point data marked last time, so that the contact sensors are prevented from being slightly changed due to vibration or looseness in the use process, and errors are generated.

Claims

1. The automatic detection device for the length and the form and position tolerance of the longitudinal I-shaped aluminum guide rail is characterized by comprising an up-down material lifting synchronous belt conveying line, a detection fixing platform, a servo positioning mechanism and a data acquisition mechanism;

2. The automatic detection device for the length and the form and position tolerance of the longitudinal I-shaped aluminum guide rail according to claim 1, wherein the adjusting feet are respectively arranged at the bottom ends of the stand columns of the support frame, the rod parts of the adjusting feet are connected with one end of the limiting clamping piece, the expansion bolts are arranged at the other ends of the limiting clamping pieces, and the detection fixing platform is arranged on the horizontal ground through the adjusting feet, the limiting clamping pieces and the expansion bolts.

3. The automatic detection device for the length and the form and position tolerance of the longitudinal I-shaped aluminum guide rail according to claim 1, wherein the adjustable horizontal bracket comprises a top supporting plate and a supporting column, the top end of the supporting column is welded with a supporting plate, the supporting plate is used for installing a laser displacement sensor, a base plate is installed at the bottom end of the supporting column, rib plates are welded between the base plate and four side walls of the supporting column, adjustable feet are installed at four corners of the base plate, the adjustable feet are connected with one end of a limit clamping piece, and the other end of the limit clamping piece is fixed on the horizontal ground through expansion bolts.

4. The automatic detection device for the length and the form and position tolerance of the longitudinal I-shaped aluminum guide rail according to claim 1, wherein the feeding and discharging lifting synchronous belt conveying line comprises a base, aluminum beams are installed at the tops of the outer sides of vertical plates at two ends of the base through bolts, pressing plates are symmetrically installed at two ends of each aluminum beam, limiting blocks are connected to the tops of the two pressing plates through bolts, a transmission shaft is arranged at one end between the two aluminum beams, two ends of the transmission shaft are respectively installed through bearings and the pressing plates on the corresponding aluminum beams in a rotating mode, belt wheels I are respectively connected to portions between the two pressing plates through keys, belt shafts are respectively installed between the pressing plates at the other ends of the two aluminum beams through bearings, belt wheels I and belt wheels II are respectively installed on the belt shafts through keys, a speed regulating motor is installed on the base through bolts, a chain wheel II is installed on the transmission shaft through keys, a clamping jaw I is connected with a cylinder, a clamping jaw II is installed on a bracket, a clamping jaw I is arranged on the bracket, a clamping jaw is connected with a clamping jaw is arranged on the bracket, and a clamping jaw I is arranged on the bracket, and a clamping jaw is arranged on the bracket.

5. The automatic detection device for length and form and position tolerance of a longitudinal I-shaped aluminum guide rail according to claim 1, wherein the servo positioning mechanism comprises a main beam fixed on a workbench, one end of the upper surface of the main beam and the side wall of the main beam are respectively provided with a linear guide rail I and a linear guide rail II, a rack is arranged on the main beam on one side of the linear guide rail I, the linear guide rail II and the rack are all arranged along the length direction of the main beam, the height of the rack is lower than that of the linear guide rail I, the movable platform consists of a horizontal plate and a vertical plate welded at one end of the horizontal plate, the movable platform is slidably mounted on the linear guide rail I and the linear guide rail II, the horizontal plate of the movable platform is fixedly connected with a sliding block on the linear guide rail I, one end of the horizontal plate of the movable platform is provided with a drag chain fixing frame, the other end of the drag chain is fixed at the end of the extension plate of the main beam, the other end of the horizontal plate of the movable platform is provided with a servo speed reducing motor, the stand is provided with a long hole for adjusting position, the output shaft of the servo speed reducing motor penetrates through the horizontal plate of the movable platform and is connected with a gear through a connecting plate matched with the movable plate, and the vertical plate is mounted on the connecting plate through the connecting plate.

6. The automatic detection device for the length and the form and position tolerance of the longitudinal I-shaped aluminum guide rail according to claim 1, wherein the data acquisition mechanism comprises a fixed base which is connected with a connecting plate on a moving platform through bolts, the lower surface of the fixed base is arranged on a workbench through a supporting seat, lateral probe mounting plates are respectively arranged on the lower surface of the fixed base, and lateral contact sensors are respectively arranged on the two lateral probe mounting plates; the upper contact type sensor is arranged on the fixed base, the detection end of the lateral contact type sensor and the detection end of the upper contact type sensor respectively penetrate through the through holes on the lateral probe mounting plate and the fixed base, and the probe protection plate is respectively arranged at the end parts.