CN112570634A - Hub bearing production line - Google Patents

Abstract

The invention relates to the technical field of bearing production, and discloses a hub bearing production line which comprises a feeding conveyor belt, an intermediate frequency heating device, a forging press, a heat treatment device, a second machining center, a size detection device and an output conveyor belt, wherein a forging stock temperature screening device and a forging stock descaling device are arranged between the heating device and the forging press; a residual temperature control device is arranged between the forging press and the processing device; one side of the forging press is provided with a quick die changing device. The multi-channel processing procedure of the hub bearing is converted into lines, so that the production efficiency of the hub bearing can be effectively improved; unqualified forging stocks can be screened out through the forging stock temperature screening device, the accumulation of oxide scales in a die cavity can be reduced through the forging stock descaling device, the replacement of a forging die can be accelerated through the rapid die changing device, and the outgoing quality and outgoing qualification rate of products can be effectively improved through the model size detection of all hub bearings.

Description

Hub bearing production line

The technical field is as follows:

the invention relates to the technical field of bearing production, in particular to a hub bearing production line.

Background art:

the existing hub bearing production is generally to carry out blanking, heating, forging and pressing, heat treatment, size processing, detection and the like firstly, but each process is carried out independently, a semi-finished product of the hub bearing needs to be transferred for many times, and the production efficiency is low.

The invention content is as follows:

the invention aims to overcome the defects of the prior art and provides a hub bearing production line, which can be used for refining a plurality of processing procedures of a hub bearing into lines and effectively improving the production efficiency of the hub bearing; unqualified forging stocks can be screened out through the forging stock temperature screening device, the accumulation of oxide scales in a die cavity can be reduced through the forging stock descaling device, the replacement of a forging die can be accelerated through the rapid die changing device, and the outgoing quality and outgoing qualification rate of products can be effectively improved through the model size detection of all hub bearings.

The scheme for solving the technical problems is as follows:

a hub bearing production line comprises a feeding conveyor belt, an intermediate frequency heating device, a forging press, a first machining center, a heat treatment device, a second machining center, a size detection device and an output conveyor belt which are sequentially arranged on a rack from left to right, wherein a forging stock temperature screening device and a forging stock descaling device are arranged between the heating device and the forging press; a waste temperature control device is arranged between the forging press and the processing device;

the intermediate-frequency heating device comprises a material guide part connected with the feeding conveyor belt, an intermediate-frequency heating coil is arranged at the lower end of the material guide part and fixed on the rack, and a forging material dragging table capable of lifting and rotating is arranged below the intermediate-frequency heating coil;

the forging stock temperature screening device comprises a material receiving channel arranged below the medium-frequency heating coil, the lower end of the material receiving channel is connected with the left end of a first conveying belt, a temperature measuring instrument is arranged above the first conveying belt, and an unqualified forging stock removing mechanism is arranged below the temperature measuring instrument; the right end of the first conveying belt is connected with a discharging channel;

the descaling device for the forged blank comprises two conveying rollers which are arranged in parallel, and the left ends of the two conveying rollers are connected with the lower end of the discharge channel; a high-pressure washing mechanism is arranged above the two conveying rollers;

one side of the forging press is provided with a quick die changing device;

the waste temperature control device comprises a temperature control box, a second conveying belt is arranged in the temperature control box, and a plurality of spray heads linearly arranged in the left-right direction are arranged above the second conveying belt;

the heat treatment device comprises a six-station rotary table, a quenching mechanism is arranged above the six-station rotary table, a transfer mechanism and a third conveying belt are arranged on one side of the six-station rotary table, and a channel, namely a tempering mechanism, an eddy current flaw detector and a two-dimensional code marking machine, is sequentially arranged on the third conveying belt;

size detection device includes testing platform, and testing platform top is equipped with work piece positioning mechanism, screw hole position degree detection mechanism, screw thread detection mechanism, slot detection mechanism and step height detection mechanism, and step height detection mechanism's right side is equipped with the defective work and plays out the mechanism, and the front side of front side platform is equipped with work piece transfer mechanism.

The material guide part is funnel-shaped, and one end of the material guide part, which is close to the feeding conveyor belt, is provided with a notch;

the forging material dragging table comprises a circular table sleeved at the lower end of the medium-frequency heating coil, the circular table is fixed at one end of a connecting plate, the other end of the connecting plate is fixed on a piston rod of a corner cylinder, and the corner cylinder is fixed on the rack.

A feeding guide channel and a discharging guide channel which are arranged on the left and right are arranged above the first conveying belt, the temperature measuring instrument is arranged above the middle of the feeding guide channel and the discharging guide channel, and the temperature measuring instrument is over against the outlet at the right end of the feeding guide channel;

the unqualified forging stock removing mechanism comprises a material pushing plate arranged on the rear side of the middle of the feeding guide channel and the discharging guide channel and a main channel arranged on the front side of the middle of the feeding guide channel and the discharging guide channel; the material pushing plate is fixed on a piston rod of the double-rod cylinder, and the double-rod cylinder is fixed on the rack; a second opening is formed in one side wall of the main channel, the second opening is connected with a branch channel, the lower end of the second opening is rotatably connected with a switching plate, the switching plate is fixed on a piston rod of a rotary cylinder, and the rotary cylinder is fixed on the bottom surface of the second opening;

and the lower ends of the main channel and the branch channel are respectively provided with a low-temperature forging stock collecting box and a high-temperature forging stock collecting box.

Two ends of the two conveying rollers are respectively hinged to the left side wall and the right side wall of the cleaning box, and a spiral convex strip is formed on the outer wall of one conveying roller; one end of each conveying roller is connected with a synchronous chain wheel, the two synchronous chain wheels are connected with a driving chain wheel through a chain, the driving chain wheel is fixed on a motor shaft of a first motor, and the first motor is fixed at the bottom of the cleaning box;

the high-pressure cleaning mechanism comprises a high-pressure water spraying head, the high-pressure water spraying head is fixed on the connecting part, and a water storage cavity communicated with the high-pressure water spraying head is formed on the high-pressure connecting part; the water storage cavities of the plurality of high-pressure connecting parts are fixedly connected with the water inlet pipe.

The quick die changing device comprises two guide rails arranged in the front-back direction, a moving platform is connected to the guide rails in a sliding manner, and two transfer platforms are arranged on two sides of the moving platform respectively; the moving platform and the transfer platform are respectively provided with two rows of roller assemblies for placing the moulds and a mould push-pull mechanism;

the mold push-pull mechanism comprises push-pull arms arranged on the two corresponding rows of roller assemblies, wherein one end of each push-pull arm is provided with an inserting groove with an opening at the upper side, the other end of each push-pull arm is rotatably connected to the movable seat, the end part of each push-pull arm, which is positioned at the inserting groove, is provided with an inclined plane, a pressure spring is fixed on the lower side wall of one end of each push-pull arm, which is close to the movable seat, the lower end of each pressure spring is fixed on the movable seat, the movable seat is in threaded connection with the middle part of a screw rod, one end of the screw rod is fixed with; the second motor is fixed in the corresponding transfer platform or the corresponding moving platform; two ends of the screw are hinged on the corresponding transfer platform or the corresponding moving platform;

the four sides of the mould are respectively provided with a hanging rod, and the slots can be hung on the hanging rods.

The spray head is connected with water sources with different water temperatures through a water pipe; and a temperature sensor is arranged in the temperature control box and is right opposite to the second conveying belt.

Six workpiece placing grooves which are uniformly distributed in the circumference are formed on the six-station rotary table, the middle part of the six-station rotary table is fixedly connected with a motor shaft of a third motor, and the third motor is fixed on the heat treatment box body;

the quenching mechanism comprises height measuring blocks, quenching coils, a main spray head, an auxiliary spray head and a blowing head which are respectively in one-to-one correspondence with five workpiece placing grooves; the height measuring block is connected to the heat treatment box body in a sliding mode, a fifth displacement sensor is arranged below the rear end of the height measuring block, the height measuring block is fixedly connected with a piston rod of a height measuring cylinder fixed on the heat treatment box body, the quenching coil is fixedly connected with a piston rod of a quenching cylinder, and the quenching cylinder is fixed on the heat treatment box body;

the channel type tempering mechanism comprises a heating channel arranged on the third conveyor belt, and a plurality of heating rods are arranged on the inner wall of the heating channel;

the transfer mechanism comprises a first linear module fixed on the heat treatment box body in the left-right direction, a second linear module arranged in the front-back direction is fixed on a first sliding block of the first linear module, a second double-rod cylinder is fixed on a second sliding block of the second linear module, and a pneumatic clamping jaw is fixed on a piston rod of the second double-rod cylinder.

The workpiece positioning mechanism comprises a first telescopic cylinder fixed on the rack, the lower end of a piston rod of the first telescopic cylinder is fixed on a lifting frame, two support arms are fixed on the lifting frame, a first sensor is fixed at the outer end of each support arm and positioned above a corresponding threaded hole of the hub bearing, the lifting frame is connected to a first guide rail in a sliding mode, and the first guide rail is fixedly connected with the rack;

a fourth motor is fixed on the lifting frame, a step turntable is fixed on a motor shaft of the fourth motor, the small end of the step turntable is inserted and sleeved in the inner hole at the upper side of the hub bearing, and the step surface of the step turntable is pressed against the upper end surface of the hub bearing;

the threaded hole position degree detection mechanism comprises a second telescopic cylinder fixed on the rack, a lifting table is fixed at the lower end of a piston rod of the second telescopic cylinder, a plurality of insertion rods which correspond to the threaded holes of the hub bearing one by one are fixed on the lifting table, the outer diameter of each insertion rod is matched with the inner diameter of each threaded hole, and a pyramid part is formed at the lower end of each insertion rod;

a positioning ring protruding downwards is formed in the middle of the lifting platform, and the positioning ring is opposite to the upper end face of the hub bearing accessory; a notch is formed in one side of the positioning ring, a first displacement sensor is fixed in the notch, and the upper end face of the hub bearing at the end part of the measuring rod of the first displacement sensor is arranged on the upper end face of the hub bearing;

the lifting platform is connected to a second guide rail in a sliding mode, and the second guide rail is fixed on the rack;

the groove detection mechanism comprises a third telescopic cylinder fixed on the rack, a pressing block is fixed at the lower end of a piston rod of the third telescopic cylinder, a radially arranged round rod is sleeved and fixed on the pressing block, and the round rod is pressed on the upper end face of the hub bearing; a ball top matched with the groove of the hub bearing is fixed on the rear side of the pressing block; a push block is arranged right behind the ball top and fixed at the end part of a piston rod of the fourth telescopic cylinder; a first guide rod is further fixed on the push block and is connected to the rack in a sliding mode, a measuring block is fixed on the first guide rod and is opposite to a measuring rod of a second displacement sensor, and the second displacement sensor is fixed on the rack;

the front end of the push block is formed with an arc-shaped groove matched with the outer diameter of the lower end of the hub bearing fitting;

the step height detection mechanism comprises a fifth telescopic cylinder fixed on the rack, a connecting frame is fixed at the lower end of a piston rod of the fifth telescopic cylinder, the connecting frame is connected onto a third guide rail fixedly connected with the rack in a sliding manner, a third displacement sensor and a fourth displacement sensor are fixed on the connecting frame, and a measuring rod of the third displacement sensor and a measuring rod of the fourth displacement sensor respectively face two step surfaces with height difference of the hub bearing;

the unqualified product kicking-out mechanism is arranged on an unqualified product discharge channel at the rear side of the detection platform, a second push block is arranged right in front of the unqualified product discharge channel, and the second push block is positioned at the front side of the detection platform and is right opposite to the lower end outer wall of the corresponding hub bearing; the second push block is fixed at the end part of a piston rod of the sixth telescopic cylinder, and the sixth telescopic cylinder is fixed on the rack; a second guide rod is fixed on the second push block and is connected to the rack in a sliding manner;

the workpiece transfer mechanism comprises five U-shaped inserting plates which are linearly and uniformly distributed, the four U-shaped inserting plates on the right side are respectively arranged in a one-to-one correspondence mode with the workpiece positioning mechanism, the threaded hole position degree detection mechanism, the thread detection mechanism, the groove detection mechanism and the step height detection mechanism, the U-shaped inserting plates are fixed on a first movable block which can move in the front-back direction, two third guide rods which are arranged in parallel are fixed on the first movable block, the third guide rods are inserted and sleeved on a second movable block which can move in the left-right direction, a seventh telescopic cylinder is fixed on the second movable block, the end part of a piston rod of the seventh telescopic cylinder is fixedly connected with the first movable block, the second movable block is slidably connected on a fourth guide rail, one end of the second movable block is fixedly connected with a piston rod of the eighth telescopic cylinder, and the eighth telescopic cylinder and the fourth;

the thread detection mechanism comprises a ninth telescopic cylinder fixed on the frame, a driving table is fixed at the lower end of a piston rod of the ninth telescopic cylinder, a nylon pressure plate is fixed in the middle of the driving table, and the nylon pressure plate is inserted and sleeved in an inner cavity at the upper end of the hub bearing;

the driving platform is hinged with a plurality of spline sleeves which correspond to the threaded holes of the hub bearing one by one, spline shafts are sleeved in the spline sleeves, screw taps matched with the threaded holes are fixed at the lower ends of the spline shafts, and the driving platform is connected to the rack in a sliding mode;

the upper end of each spline housing is fixed with synchronous pulley, and a plurality of synchronous pulleys pass through the hold-in range and connect, and one of them synchronous pulley is equipped with the fifth motor that drives its pivoted.

The invention has the following outstanding effects:

compared with the prior art, the multi-channel processing procedure of the hub bearing is converted into lines, so that the production efficiency of the hub bearing can be effectively improved; unqualified forging stocks can be screened out through the forging stock temperature screening device, the accumulation of oxide scales in a die cavity can be reduced through the forging stock descaling device, the replacement of a forging die can be accelerated through the rapid die changing device, and the outgoing quality and outgoing qualification rate of products can be effectively improved through the model size detection of all hub bearings.

Description of the drawings:

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1 with respect to B;

FIG. 4 is a view of FIG. 3 taken in the direction of C;

FIG. 5 is an enlarged view of a portion of FIG. 1 taken about D;

FIG. 6 is a view of FIG. 5 taken in the direction of E;

FIG. 7 is an enlarged view of a portion of FIG. 1 about F;

FIG. 8 is an enlarged view of a portion of FIG. 7 with respect to G;

FIG. 9 is a top view of FIG. 7;

FIG. 10 is an enlarged view of a portion of FIG. 1 taken about H;

FIG. 11 is an enlarged view of a portion of FIG. 1 with respect to I;

FIG. 12 is a cross-sectional view of FIG. 11 taken about J-J;

FIG. 13 is a cross-sectional view of FIG. 12 taken about P-P

FIG. 14 is an enlarged view of a portion of FIG. 1 taken about K;

FIG. 15 is an enlarged view of a portion of FIG. 14 taken about L;

FIG. 16 is an enlarged view of a portion of FIG. 14 with respect to M;

FIG. 17 is a cross-sectional view of FIG. 16 taken about N-N;

fig. 18 is a cross-sectional view of fig. 14 taken about O-O.

The specific implementation mode is as follows:

in the embodiment, as shown in fig. 1 to 18, a hub bearing production line comprises a feeding conveyor belt 11, a medium-frequency heating device 2, a forging press 13, a first processing center, a heat treatment device 6, a second processing center, a size detection device 7 and an output conveyor belt 12 which are sequentially arranged on a frame from left to right, wherein a forging stock temperature screening device 3 and a forging stock descaling device 4 are arranged between the heating device 2 and the forging press 13; a waste temperature control device 5 is arranged between the forging press 13 and the processing device 6;

the intermediate frequency heating device 2 comprises a material guiding part 21 connected with the feeding conveyor belt 11, an intermediate frequency heating coil 22 is arranged at the lower end of the material guiding part 21, the intermediate frequency heating coil 22 is fixed on the rack, and a forging material dragging table 23 capable of lifting and rotating is arranged below the intermediate frequency heating coil 22;

the forging stock temperature screening device 3 comprises a material receiving channel 31 arranged below the intermediate frequency heating coil 22, the lower end of the material receiving channel 31 is connected with the left end of a first conveying belt 32, a temperature measuring instrument 33 is arranged above the first conveying belt 32, and an unqualified forging stock removing mechanism 34 is arranged below the temperature measuring instrument 33; the right end of the first conveying belt 32 is connected with a discharging channel 35;

the descaling device 4 for the forged blank comprises two conveying rollers 41 which are arranged in parallel, and the left ends of the two conveying rollers 41 are connected with the lower end of the discharging channel 35; a high-pressure washing mechanism 42 is arranged above the two conveying rollers 41;

one side of the forging press 13 is provided with a quick die changing device 8;

the waste heat temperature control device 5 comprises a temperature control box 51, a second conveying belt 52 is arranged in the temperature control box 51, and a plurality of spray heads 53 which are linearly arranged in the left-right direction are arranged above the second conveying belt 52;

the heat treatment device 6 comprises a six-station rotating table 61, a quenching mechanism 62 is arranged above the six-station rotating table 61, a transfer mechanism 65 and a third conveying belt 66 are arranged on one side of the multi-station rotating table 61, and a tempering mechanism 63, an eddy current flaw detector 64 and a two-dimensional code marking machine 67 are sequentially arranged on the third conveying belt 66;

the size detection device 7 comprises a detection platform 71, a workpiece positioning mechanism 72, a threaded hole position degree detection mechanism 73, a thread detection mechanism, a groove detection mechanism 74 and a step height detection mechanism 75 are arranged above the detection platform 71, an unqualified product kicking-out mechanism 76 is arranged on the right side of the step height detection mechanism 75, and a workpiece transfer mechanism 77 is arranged on the front side of the front side platform 71.

Furthermore, the material guiding part 21 is funnel-shaped, and a notch 211 is formed at one end of the material guiding part 21 close to the feeding conveyor belt 11;

the forging material dragging table 23 comprises a circular table 231 which is inserted and sleeved at the lower end of the intermediate-frequency heating coil 22, the circular table 231 is fixed at one end of a connecting plate 232, the other end of the connecting plate 232 is fixed on a piston rod of the corner cylinder 24, and the corner cylinder 24 is fixed on the rack.

Furthermore, a feeding guide channel 36 and a discharging guide channel 37 which are arranged on the left and right are arranged above the first conveying belt 32, the temperature measuring instrument 33 is arranged above the middle of the feeding guide channel 36 and the discharging guide channel 37, and the temperature measuring instrument 33 is over against the outlet at the right end of the feeding guide channel 36;

the unqualified forging stock rejecting mechanism 34 comprises a material pushing plate 341 arranged at the rear side of the middle of the feeding guide channel 36 and the discharging guide channel 37 and a main channel 342 arranged at the front side of the middle of the feeding guide channel 36 and the discharging guide channel 37; the material pushing plate 341 is fixed on a piston rod of the double-rod cylinder 343, and the double-rod cylinder 343 is fixed on the frame; a second gap 344 is arranged on one side wall of the main channel 342, the second gap 344 is connected with a branch channel 345, the lower end of the second gap 344 is rotatably connected with a switching plate 346, the switching plate 346 is fixed on a piston rod of a rotary cylinder, and the rotary cylinder is fixed on the bottom surface of the second gap 344;

the lower ends of the main passage 342 and the branch passages 345 are respectively provided with a low temperature forging stock collecting box 347 and a high temperature forging stock collecting box 348.

Furthermore, two ends of the two conveying rollers 41 are respectively hinged on the left side wall and the right side wall of the cleaning box 43, and a spiral convex strip 411 is formed on the outer wall of one conveying roller 41; one end of each conveying roller 41 is connected with a synchronous chain wheel 44, the two synchronous chain wheels 44 are connected with driving chain wheels through chains 45, the driving chain wheels 46 are fixed on a motor shaft of a first motor 47, and the first motor 47 is fixed at the bottom of the cleaning box 43;

the high-pressure cleaning mechanism 42 comprises a high-pressure water spraying head 421, the high-pressure water spraying head 421 is fixed on the connecting part 422, and a water storage cavity 423 communicated with the high-pressure water spraying head 421 is formed on the high-pressure connecting part 422; the water storage cavities 422 of the plurality of high-pressure connecting parts 422 are fixedly connected with the water inlet pipe 424.

Furthermore, the rapid die changing device 8 comprises two guide rails 81 arranged in the front-back direction, a moving platform 82 is connected to the guide rails 81 in a sliding manner, and two transfer platforms 83 are respectively arranged on two sides of the moving platform 82; the moving platform 82 and the transfer platform 83 are respectively provided with two rows of roller assemblies 84 for placing a mould 86 and a mould push-pull mechanism 85;

the mold push-pull mechanism 85 comprises push-pull arms 851 arranged on the two corresponding rows of roller assemblies 84, wherein one ends of the push-pull arms 851 are formed with inserting grooves 8511 with openings on the upper sides, the other ends of the push-pull arms 851 are rotatably connected to the moving seat 852, the end parts of the push-pull arms 851, which are positioned on the inserting grooves 511, are formed with inclined surfaces 8512, a pressure spring 853 is fixed on the lower side wall of one end of the push-pull arms 851, which is close to the moving seat 852, the lower end of the pressure spring 853 is fixed on the moving seat 852, the moving seat 852 is screwed in the middle of a screw 854, one end of the screw 854 is fixed with a large gear 855, the large gear 855 is meshed with a small gear 85; the second motor 858 is fixed in the corresponding transfer platform 83 or the moving platform 82; two ends of the screw 854 are hinged on the corresponding transit platform 83 or the corresponding moving platform 82;

the four sides of the mold 86 are respectively provided with a hanging rod 861, and the inserting grooves 8511 can be hung on the hanging rods 861.

Furthermore, the spray head 53 is connected with water sources with different water temperatures through a water pipe; and a temperature sensor is arranged in the temperature control box 51 and is right opposite to the second conveying belt.

Furthermore, six workpiece placing grooves 611 which are uniformly distributed on the circumference are formed on the six-station rotary table 61, the middle part of the six-station rotary table 61 is fixedly connected with a motor shaft of a third motor 612, and the third motor 612 is fixed on the heat treatment box body 68;

the quenching mechanism 62 comprises a height measuring block 621, a quenching coil 622, a main spray head 623, an auxiliary spray head 624 and a blow head 625 which are respectively in one-to-one correspondence with five workpiece placing grooves 611; the height measuring block 621 is connected to the heat treatment box body 68 in a sliding manner, a fifth displacement sensor 626 is arranged below the rear end of the height measuring block 621, the height measuring block 621 is fixedly connected with a piston rod of a height measuring cylinder 627 fixed on the heat treatment box body 68, the quenching coil 622 is fixedly connected with a piston rod of a quenching cylinder 628, and the quenching cylinder 628 is fixed on the heat treatment box body 68;

the channel type tempering mechanism 63 comprises a heating channel 631 arranged on the third conveyor belt 66, and a plurality of heating rods are arranged on the inner wall of the heating channel 631;

the transfer mechanism 65 comprises a first linear module 651 fixed on the heat treatment box 65 in the left-right direction, a second linear module 652 fixed on a first slide block of the first linear module 651 in the front-back direction, a second double-rod cylinder 653 fixed on a second slide block of the second linear module 652, and a pneumatic clamping jaw 654 fixed on a piston rod of the second double-rod cylinder 653.

Furthermore, the workpiece positioning mechanism 72 includes a first telescopic cylinder 721 fixed on the frame, the lower end of the piston rod of the first telescopic cylinder 721 is fixed on a lifting frame 722, two support arms 723 are fixed on the lifting frame 722, the outer ends of the support arms 723 are fixed with a first sensor 724, the first sensor 724 is located above the corresponding threaded hole 101 of the hub bearing 100, the lifting frame 722 is slidably connected on a first guide rail 727, and the first guide rail 727 is fixedly connected with the frame;

a fourth motor 725 is fixed on the lifting frame 722, a step rotary disc 726 is fixed on a motor shaft of the fourth motor 725, a small end of the step rotary disc 726 is inserted and sleeved in an upper side inner hole of the hub bearing 100, and a step surface of the step rotary disc 726 is pressed against the upper end surface of the hub bearing 100;

the threaded hole position degree detection mechanism 73 comprises a second telescopic cylinder 731 fixed on the frame, the lower end of a piston rod of the second telescopic cylinder 731 is fixed with a lifting table 732, a plurality of insertion rods 733 which are in one-to-one correspondence with the threaded holes 101 of the hub bearing 100 are fixed on the lifting table 732, the outer diameter of the insertion rods 733 is matched with the inner diameter of the threaded holes 101, and a conical part is formed at the lower end of the insertion rods 733;

a positioning ring 736 protruding downwards is formed in the middle of the lifting platform 732, and the positioning ring 736 is opposite to the upper end surface of the hub bearing assembly 100; a notch is formed in one side of the positioning ring 736, a first displacement sensor 734 is fixed in the notch, and the upper end face of the hub bearing 100 at the end part of the measuring rod of the first displacement sensor 734 is provided with a first end face;

the lifting table 732 is slidably connected to a second guide rail 735, and the second guide rail 735 is fixed on the frame;

the groove detection mechanism 74 comprises a third telescopic cylinder 741 fixed on the frame, a pressing block 742 is fixed at the lower end of a piston rod of the third telescopic cylinder 741, a radially arranged round rod 743 is sleeved and fixed on the pressing block 742, and the round rod 743 is pressed against the upper end face of the hub bearing 100; a spherical top 744 matched with the groove 102 of the hub bearing 100 is fixed at the rear side of the pressing block 742; a push block 745 is arranged right behind the ball top 744, and the push block 745 is fixed at the end part of a piston rod of the fourth telescopic cylinder 746; a first guide rod 749 is further fixed on the pushing block 745, the first guide rod 749 is slidably connected to the rack, a measuring block 747 is fixed on the first guide rod 746, the measuring block 747 is over against a measuring rod of a second displacement sensor 748, and the second displacement sensor 748 is fixed on the rack;

the front end of the pushing block 745 is formed with an arc-shaped groove 7451 which is matched with the outer diameter of the lower end of the hub bearing accessory 100;

the step height detection mechanism 75 comprises a fifth telescopic cylinder 751 fixed on the frame, a connecting frame 752 is fixed at the lower end of a piston rod of the fifth telescopic cylinder 751, the connecting frame 752 is slidably connected on a third guide rail 753 fixedly connected with the frame, a third displacement sensor 754 and a fourth displacement sensor 755 are fixed on the connecting frame 752, and a measuring rod of the third displacement sensor 754 and a measuring rod of the fourth displacement sensor 755 respectively face two step surfaces with height difference of the hub bearing 100;

the unqualified product kicking-out mechanism 76 is arranged on an unqualified product discharge channel 761 on the rear side of the detection platform 71, a second push block 762 is arranged right in front of the unqualified product discharge channel 761, and the second push block 762 is positioned on the front side of the detection platform 71 and is right opposite to the outer wall of the lower end of the corresponding hub bearing 100; the second pushing block 762 is fixed at the end of a piston rod of a sixth telescopic cylinder 763, and the sixth telescopic cylinder 763 is fixed on the frame; a second guide rod 764 is fixed to the second pushing block 762, and the second guide rod 764 is slidably connected to the frame;

the workpiece transfer mechanism 77 comprises five linearly and uniformly distributed U-shaped inserting plates 771, the four U-shaped inserting plates 771 on the right side are respectively arranged in one-to-one correspondence with the workpiece positioning mechanism 72, the threaded hole position degree detection mechanism 73, the thread detection mechanism, the groove detection mechanism 74 and the step height detection mechanism 75, the U-shaped inserting plates 771 are fixed on a first moving block 772 capable of moving in the front-back direction, two third guide rods 773 arranged in parallel are fixed on the first moving block 772, the third guide rods 773 are inserted and sleeved on a second moving block 774 capable of moving in the left-right direction, a seventh telescopic cylinder 775 is fixed on the second moving block 774, the end part of a piston rod of the seventh telescopic cylinder 775 is fixedly connected with the first moving block 772, the second moving block 774 is slidably connected to the fourth guide rail 776, one end of the second moving block 774 is fixedly connected with a piston rod of an eighth telescopic cylinder 777, and the eighth telescopic cylinder 777 and the fourth guide rail 776 are fixed on the rack;

the thread detection mechanism comprises a ninth telescopic cylinder fixed on the frame, a driving table is fixed at the lower end of a piston rod of the ninth telescopic cylinder, a nylon pressure plate is fixed in the middle of the driving table, and the nylon pressure plate is inserted and sleeved in an inner cavity at the upper end of the hub bearing 100;

a plurality of spline sleeves which correspond to the threaded holes 101 of the hub bearing 100 one by one are hinged on the driving platform, spline shafts are sleeved in the spline sleeves, screw taps matched with the threaded holes 101 are fixed at the lower ends of the spline shafts, and the driving platform is connected to the rack in a sliding mode;

the upper end of each spline housing is fixed with synchronous pulley, and a plurality of synchronous pulleys pass through the hold-in range and connect, and one of them synchronous pulley is equipped with the fifth motor that drives its pivoted.

The working principle is as follows: firstly, the forging stocks 99 are sequentially conveyed from left to right at equal intervals by the feeding conveyor belt 11;

secondly, the forging stock 99 automatically slides into the material guide part 21 when being conveyed to the right side of the feeding conveyor belt 11, the forging stock 99 is automatically inserted into the intermediate frequency heating coil 22 under the guiding action of the material guide part 21, the intermediate frequency heating coil 22 heats the forging stock 99, after the heating is finished, the corner cylinder drives the forging stock dragging table 23 to move downwards and rotate 90 degrees, the forging stock 99 automatically falls onto the material receiving channel 31, and then the forging stock dragging table rotates and moves upwards to reset;

thirdly, the forging stock 99 on the material receiving channel 31 slides down onto the first conveying belt 32 and is conveyed rightwards through the first conveying belt 32, the temperature measuring instrument 33 can detect the temperature of the forging stock 99, when the temperature is qualified, the forging stock 99 continues to move rightwards and enters the discharging channel 35, when the temperature of the forging stock is unqualified, the material pushing plate 341 moves forwards under the action of the double-rod cylinder 343 and pushes the unqualified forging stock 99 into the main channel 342, if the temperature is too low, the forging stock directly slides downwards into the low-temperature forging stock collecting box 347, if the temperature is too high, the switching plate 346 turns rightwards under the action of the rotary cylinder, and the forging stock enters the branch channel 345 from the second opening 344 and slides downwards into the high-temperature forging stock collecting box 348 under the blocking action of the switching plate 346;

fourthly, the forging stock on the discharging channel 35 slides downwards between the two conveying rollers 41, the oxide skin on the surface of the forging stock is rapidly removed through the friction between the conveying rollers 41 and the forging stock and the high-pressure water washing action of the high-pressure cleaning mechanism on the forging stock, and the forging stock is conveyed through the spiral bulge on one of the conveying rollers;

fifthly, the robot sends the forging stock into a die of a forging press, after forging and pressing are finished, the robot places the forged hub bearing 100 (the forged forging stock becomes the hub bearing) on a second conveyer belt 52, the second conveyer belt 52 conveys the hub bearing 100 to the right, water with different water temperatures can be sprayed out through a plurality of spray heads 53 to cool the hub bearing 100, and the temperature in the temperature control box 51 can be monitored in real time through a temperature sensor; the robot sends the hub bearing on the second conveyor belt 52 to the first processing center for primary processing, and the robot puts the hub bearing on the fourth conveyor belt 14 after the processing

Sixthly, the hub bearing conveyed to the right end of the fourth conveyor belt 14 is clamped by the pneumatic clamping jaw and placed in a workpiece placing groove 611 at a specific position, the third motor 612 drives the station rotating table to rotate intermittently at equal angles, when the hub bearing rotates to the position below the height measuring block 621, the height measuring cylinder drives the height measuring block to move downwards and press the height measuring block on the hub bearing and a measuring rod of the fifth displacement sensor, and the fifth displacement sensor can measure the height of the hub bearing; when the hub bearing moves below the quenching coil, the quenching cylinder drives the quenching coil to move downwards and heat the hub bearing, when the hub bearing moves below the main spray head, the main spray head sprays water to cool the hub bearing, when the hub bearing moves below the auxiliary spray head, the auxiliary spray head cools the hub bearing again, when the hub bearing moves below the blow head, the blow head blows off the water on the hub bearing, then the hub bearing rotates a station again (returns to the original position at the moment) and the pneumatic clamping jaws move the hub bearing to a third conveying belt, and if the height measurement is unqualified, the pneumatic clamping jaws move the hub bearing to a corresponding scrapped position;

seventhly, the hub bearing is conveyed to the heating channel 621 by a third conveying belt to be tempered, then flaw detection is carried out below the eddy current flaw detector (unqualified flaw detection can be removed by the unqualified product kicking-out mechanism 76), and finally two-dimensional code printing is carried out on the outer wall of the hub bearing when the unqualified flaw detection passes through the two-dimensional code printer 67;

eighthly, the robot puts the hub bearing into a second machining center for secondary machining, after the machining is finished, the robot puts the wheel roller bearing on the detection platform, the U-shaped inserting plate can move backwards under the action of a seventh telescopic cylinder and is inserted into the hub bearing, and then the U-shaped inserting plate translates rightwards for one station under the action of the second telescopic cylinder; when the hub bearing moves below the workpiece positioning mechanism 72, the first telescopic cylinder 721 drives the two first sensors to move downwards and the step turntable 726 to move downwards through the lifting frame 722, the step turntable 726 is inserted in the hub shaft, the fourth motor 725 drives the step turntable 726 to rotate, and when the first sensor detects the position of the threaded hole of the hub bearing, the fourth motor stops rotating, so that the hub bearing is positioned; after the positioning is finished, the hub bearing translates to the right for one station, the second telescopic cylinder drives the lifting table to move downwards, the lifting table drives the plurality of inserted rods to move downwards, and the inserted rods are inserted into the corresponding threaded holes; when the position degrees of the plurality of threaded holes are qualified, each inserted rod can be completely inserted into the threaded hole, the positioning ring can be pressed against the upper end face of the corresponding hub bearing, the measuring rod of the first displacement sensor is also pressed against the upper end face of the hub bearing at the moment, and the value measured by the first displacement sensor meets the requirement at the moment; when the position degrees among the threaded holes do not meet the requirements, at least one insert rod cannot be completely inserted into the threaded hole, the positioning ring possibly cannot touch the upper end face of the hub bearing, and the value measured by the displacement sensor does not meet the requirements at the moment; the hub bearing continues to move rightwards by one station, the ninth telescopic cylinder drives the nylon pressure plate to move downwards, the nylon pressure plate is inserted and sleeved at the upper end of the hub bearing so as to fasten the hub bearing, then the fifth motor drives the screw taps to rotate simultaneously through the synchronous belt and the synchronous belt, the screw taps are screwed into corresponding threaded holes, and the screw taps are qualified if being screwed in and unqualified if not being screwed in;

ninth, the hub bearing continues to move to the right by one station, the third telescopic cylinder drives the pressing block to move downwards, the round rod is pressed on the upper end face of the hub bearing, then the fourth telescopic cylinder drives the pushing block to move forwards and pushes the corresponding hub bearing to move forwards, the groove of the hub bearing fitting can be inserted and sleeved on the top of the ball, the ball top is pressed on the groove, and meanwhile, the pushing block drives the measuring block to move forwards through the first guide rod and is pressed on the measuring rod of the second displacement sensor; when the top of the ball is fully engaged with the groove and the top of the ball cannot be fully engaged with the groove (i.e., the groove position or size is not satisfactory), the value measured by the second displacement sensor 68 is not the same;

tenth, the hub bearing moves one station to the right continuously, the fifth telescopic cylinder drives the connecting frame to move downwards, and the connecting frame drives the third displacement sensor and the fourth displacement sensor to move downwards and press against two different surfaces, so that the height difference of the two step surfaces is measured;

eleventh, the hub bearing moves to the front side of the defective product discharge channel 761, and if the hub bearing is qualified, the hub bearing is transferred to a discharge transmission belt through a U-shaped inserting plate; if the hub bearing is not qualified, the second pushing block 762 pushes the hub bearing into the unqualified product discharging channel 761 under the action of the sixth telescopic cylinder.

Principle of the rapid die changing device: placing a die to be replaced on a roller assembly of one transfer platform in advance, and completing the assembly; then the die replaced from the forging press is placed on the moving platform, the moving platform moves to another transfer platform along the guide rail for one time and moves the die to another transfer platform, and then the moving platform drives the die to move to the forging press when the die to be replaced is moved to the moving platform, so that the die is replaced quickly.

The above embodiments are only for illustrating the present invention, and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions also fall into the scope of the present invention, and the scope of the present invention should be limited by the claims.

Claims (8)

1. The utility model provides a wheel hub bearing production line, includes from left to right sets gradually feeding conveyer belt (11), intermediate frequency heating device (2), forging press (13), first machining center, heat treatment device (6), second machining center, size detection device (7) and output conveyer belt (12) in the frame, its characterized in that: a forging stock temperature screening device (3) and a forging stock descaling device (4) are arranged between the heating device (2) and the forging press (13); a waste temperature control device (5) is arranged between the forging press (13) and the processing device (6);

the medium-frequency heating device (2) comprises a material guide part (21) connected with the feeding conveyor belt (11), a medium-frequency heating coil (22) is arranged at the lower end of the material guide part (21), the medium-frequency heating coil (22) is fixed on the rack, and a material forging tray (23) capable of lifting and rotating is arranged below the medium-frequency heating coil (22);

the forging stock temperature screening device (3) comprises a material receiving channel (31) arranged below the intermediate frequency heating coil (22), the lower end of the material receiving channel (31) is connected with the left end of a first conveying belt (32), a temperature measuring instrument (33) is arranged above the first conveying belt (32), and an unqualified forging stock removing mechanism (34) is arranged below the temperature measuring instrument (33); the right end of the first conveying belt (32) is connected with a discharge channel (35);

the forged blank descaling device (4) comprises two conveying rollers (41) which are arranged in parallel, and the left ends of the two conveying rollers (41) are connected with the lower end of the discharging channel (35); a high-pressure washing mechanism (42) is arranged above the two conveying rollers (41);

one side of the forging press (13) is provided with a quick die changing device (8);

the waste heat temperature control device (5) comprises a temperature control box (51), a second conveying belt (52) is arranged in the temperature control box (51), and a plurality of spray heads (53) which are linearly arranged in the left-right direction are arranged above the second conveying belt (52);

the heat treatment device (6) comprises a six-station rotating table (61), a quenching mechanism (62) is arranged above the six-station rotating table (61), a transfer mechanism (65) and a third conveying belt (66) are arranged on one side of the six-station rotating table (61), and a channel type tempering mechanism (63), an eddy current flaw detector (64) and a two-dimensional code marking machine (67) are sequentially arranged on the third conveying belt (66);

size detection device (7) is equipped with work piece positioning mechanism (72), screw hole position degree detection mechanism (73), screw thread detection mechanism, slot detection mechanism (74) and step height detection mechanism (75) including testing platform (71), testing platform (71) top, and the right side of step height detection mechanism (75) is equipped with defective work and kicks out mechanism (76), and the front side of front side platform (71) is equipped with work piece transfer mechanism (77).

2. A hub bearing production line according to claim 1, wherein: the material guide part (21) is funnel-shaped, and one end, close to the feeding conveyor belt (11), of the material guide part (21) is provided with a notch (211) in a forming mode;

the forging material dragging table (23) comprises a circular table (231) which is inserted at the lower end of the intermediate-frequency heating coil (22), the circular table (231) is fixed at one end of a connecting plate (232), the other end of the connecting plate (232) is fixed on a piston rod of a corner cylinder (24), and the corner cylinder (24) is fixed on the rack.

3. A hub bearing production line according to claim 1, wherein: a feeding guide channel (36) and a discharging guide channel (37) which are arranged on the left and right are arranged above the first conveying belt (32), the temperature measuring instrument (33) is arranged above the middle of the feeding guide channel (36) and the discharging guide channel (37), and the temperature measuring instrument (33) is over against the outlet at the right end of the feeding guide channel (36);

the unqualified forging stock rejecting mechanism (34) comprises a material pushing plate (341) arranged on the rear side of the middle of the feeding guide channel (36) and the discharging guide channel (37) and a main channel (342) arranged on the front side of the middle of the feeding guide channel (36) and the discharging guide channel (37); the material pushing plate (341) is fixed on a piston rod of the double-rod cylinder (343), and the double-rod cylinder (343) is fixed on the frame; a second gap (344) is formed in one side wall of the main channel (342), the second gap (344) is connected with a branch channel (345), the lower end of the second gap (344) is rotatably connected with a switching plate (346), the switching plate (346) is fixed on a piston rod of a rotary cylinder, and the rotary cylinder is fixed on the bottom surface of the second gap (344);

the lower ends of the main channel (342) and the branch channels (345) are respectively provided with a low-temperature forging stock collecting box (347) and a high-temperature forging stock collecting box (348).

4. A hub bearing production line according to claim 1, wherein: two ends of the two conveying rollers (41) are respectively hinged to the left side wall and the right side wall of the cleaning box (43), and a spiral convex strip (411) is formed on the outer wall of one conveying roller (41); one end of each conveying roller (41) is connected with a synchronous chain wheel (44), the two synchronous chain wheels (44) are connected with a driving chain wheel through a chain (45), the driving chain wheel (46) is fixed on a motor shaft of a first motor (47), and the first motor (47) is fixed at the bottom of the cleaning box (43);

the high-pressure cleaning mechanism (42) comprises a high-pressure water spraying head (421), the high-pressure water spraying head (421) is fixed on the connecting part (422), and a water storage cavity (423) communicated with the high-pressure water spraying head (421) is formed on the high-pressure connecting part (422); the water storage cavities (422) of the high-pressure connecting parts (422) are fixedly connected with the water inlet pipe (424).

5. A hub bearing production line according to claim 1, wherein: the rapid die changing device (8) comprises two guide rails (81) arranged in the front-back direction, a moving platform (82) is connected onto the guide rails (81) in a sliding manner, and two transfer platforms (83) are respectively arranged on two sides of the moving platform (82); the moving platform (82) and the middle turning platform (83) are respectively provided with two rows of roller assemblies (84) for placing a mould (86) and a mould push-pull mechanism (85);

the mold push-pull mechanism (85) comprises push-pull arms (851) arranged on two corresponding rows of roller assemblies (84), wherein one ends of the push-pull arms (851) are formed with inserting grooves (8511) with openings at the upper sides, the other ends of the push-pull arms (851) are rotatably connected to a moving seat (852), the end parts of the push-pull arms (851) positioned in the inserting grooves (511) are formed with inclined planes (8512), the lower side wall of one end, close to the moving seat (852), of each push-pull arm (851) is fixedly provided with a pressure spring (853), the lower ends of the pressure springs (853) are fixedly arranged on the moving seat (852), the moving seat (852) is screwed in the middle of a screw rod (854), one end of the screw rod (854) is fixedly provided with a bull gear (855), the bull gear (855) is meshed with a pinion (857) through an idler wheel (856), and the; the second motor (858) is fixed in the corresponding transfer platform (83) or the corresponding moving platform (82); two ends of the screw rod (854) are hinged on the corresponding transfer platform (83) or the corresponding moving platform (82);

the four sides of the mould (86) are respectively provided with a hanging rod (861), and the inserting grooves (8511) can be hung on the hanging rods (861).

6. A hub bearing production line according to claim 1, wherein: the spray head (53) is connected with water sources with different water temperatures through a water pipe; the temperature control box (51) is a second conveyor belt.

7. A hub bearing production line according to claim 1, wherein: six workpiece placing grooves (611) which are uniformly distributed in the circumference are formed in the six-station rotary table (61), the middle of the six-station rotary table (61) is fixedly connected with a motor shaft of a third motor (612), and the third motor (612) is fixed on a heat treatment box body (68);

the quenching mechanism (62) comprises height measuring blocks (621), quenching coils (622), main spray heads (623), auxiliary spray heads (624) and blowing heads (625), which are respectively in one-to-one correspondence with five workpiece placing grooves (611); the height measuring block (621) is connected to the heat treatment box body (68) in a sliding mode, a fifth displacement sensor (626) is arranged below the rear end of the height measuring block (621), the height measuring block (621) is fixedly connected with a piston rod of a height measuring cylinder (627) fixed on the heat treatment box body (68), the quenching coil (622) is fixedly connected with a piston rod of a quenching cylinder (628), and the quenching cylinder (628) is fixed on the heat treatment box body (68);

the channel type tempering mechanism (63) comprises a heating channel (631) arranged on the third conveyor belt (66), and a plurality of heating rods are arranged on the inner wall of the heating channel (631);

the transfer mechanism (65) comprises a first linear module (651) fixed on the heat treatment box body (65) and arranged in the left-right direction, a second linear module (652) arranged in the front-back direction is fixed on a first sliding block of the first linear module (651), a second double-rod air cylinder (653) is fixed on a second sliding block of the second linear module (652), and a pneumatic clamping jaw (654) is fixed on a piston rod of the second double-rod air cylinder (653).

8. A hub bearing production line according to claim 1, wherein: the workpiece positioning mechanism (72) comprises a first telescopic cylinder (721) fixed on the rack, the lower end of a piston rod of the first telescopic cylinder (721) is fixed on a lifting frame (722), two supporting arms (723) are fixed on the lifting frame (722), the outer ends of the supporting arms (723) are fixed with a first sensor (724), the first sensor (724) is located above a corresponding threaded hole (101) of the hub bearing (100), the lifting frame (722) is connected to a first guide rail (727) in a sliding mode, and the first guide rail (727) is fixedly connected with the rack;

a fourth motor (725) is fixed on the lifting frame (722), a step rotating disc (726) is fixed on a motor shaft of the fourth motor (725), the small end of the step rotating disc (726) is inserted and sleeved in an inner hole in the upper side of the hub bearing (100), and the step surface of the step rotating disc (726) is pressed against the upper end surface of the hub bearing (100);

the threaded hole position degree detection mechanism (73) comprises a second telescopic cylinder (731) fixed on the rack, a lifting table (732) is fixed at the lower end of a piston rod of the second telescopic cylinder (731), a plurality of insertion rods (733) which correspond to the threaded holes (101) of the hub bearing (100) in a one-to-one mode are fixed on the lifting table (732), the outer diameter of each insertion rod (733) is matched with the inner diameter of each threaded hole (101), and a conical part is formed at the lower end of each insertion rod (733);

a positioning ring (736) protruding downwards is formed in the middle of the lifting platform (732), and the positioning ring (736) is over against the upper end face of the hub bearing accessory (100); a notch is formed in one side of the positioning ring (736), a first displacement sensor (734) is fixed in the notch, and the upper end face of the hub bearing (100) at the end part of the measuring rod of the first displacement sensor (734);

the lifting table (732) is connected to the second guide rail (735) in a sliding mode, and the second guide rail (735) is fixed to the rack;

the groove detection mechanism (74) comprises a third telescopic cylinder (741) fixed on the rack, a pressing block (742) is fixed at the lower end of a piston rod of the third telescopic cylinder (741), a round rod (743) arranged in the radial direction is sleeved and fixed on the pressing block (742), and the round rod (743) is pressed against the upper end face of the hub bearing (100); a spherical top (744) matched with the groove (102) of the hub bearing (100) is fixed on the rear side of the pressing block (742); a push block (745) is arranged right behind the ball top (744), and the push block (745) is fixed at the end part of a piston rod of the fourth telescopic cylinder (746); a first guide rod (749) is further fixed on the push block (745), the first guide rod (749) is connected to the rack in a sliding manner, a measuring block (747) is fixed on the first guide rod (746), the measuring block (747) is over against a measuring rod of a second displacement sensor (748), and the second displacement sensor (748) is fixed on the rack;

the front end of the push block (745) is formed with an arc-shaped groove (7451) matched with the outer diameter of the lower end of the hub bearing accessory (100);

the step height detection mechanism (75) comprises a fifth telescopic cylinder (751) fixed on the rack, the lower end of a piston rod of the fifth telescopic cylinder (751) is fixedly provided with a connecting frame (752), the connecting frame (752) is slidably connected on a third guide rail (753) fixedly connected with the rack, the connecting frame (752) is fixedly provided with a third displacement sensor (754) and a fourth displacement sensor (755), and a measuring rod of the third displacement sensor (754) and a measuring rod of the fourth displacement sensor (755) respectively face two step surfaces with height difference of the hub bearing (100);

the unqualified product kicking-out mechanism (76) is arranged on an unqualified product discharge channel (761) on the rear side of the detection platform (71), a second push block (762) is arranged right in front of the unqualified product discharge channel (761), and the second push block (762) is positioned on the front side of the detection platform (71) and is right opposite to the outer wall of the lower end of the corresponding hub bearing (100); the second push block (762) is fixed at the end part of a piston rod of a sixth telescopic cylinder (763), and the sixth telescopic cylinder (763) is fixed on the rack; a second guide rod (764) is fixed to the second pushing block (762), and the second guide rod (764) is connected to the rack in a sliding mode;

the workpiece transfer mechanism (77) comprises five U-shaped inserting plates (771) which are linearly and uniformly distributed, the four U-shaped inserting plates (771) on the right side are respectively arranged in a one-to-one correspondence mode with the workpiece positioning mechanism (72), the threaded hole position degree detection mechanism (73), the thread detection mechanism, the groove detection mechanism (74) and the step height detection mechanism (75), the U-shaped inserting plates (771) are fixed on a first moving block (772) capable of moving in the front-back direction, two third guide rods (773) which are arranged in parallel are fixed on the first moving block (772), the third guide rods (773) are inserted and sleeved on a second moving block (774) capable of moving in the left-right direction, a seventh telescopic cylinder (775) is fixed on the second moving block (774), the end portion of a piston rod of the seventh telescopic cylinder (775) is fixedly connected with the first moving block (772), and the second moving block (774) is connected with a fourth guide rail (776) in, one end of the second moving block (774) is fixedly connected with a piston rod of an eighth telescopic cylinder (777), and the eighth telescopic cylinder (777) and the fourth guide rail (776) are fixed on the rack;

the thread detection mechanism comprises a ninth telescopic cylinder fixed on the frame, a driving table is fixed at the lower end of a piston rod of the ninth telescopic cylinder, a nylon pressure plate is fixed in the middle of the driving table, and the nylon pressure plate is inserted and sleeved in an inner cavity at the upper end of the hub bearing (100);

a plurality of spline sleeves which correspond to the threaded holes (101) of the hub bearing (100) one by one are hinged on the driving platform, spline shafts are sleeved in the spline sleeves, screw taps matched with the threaded holes (101) are fixed at the lower ends of the spline shafts, and the driving platform is connected to the rack in a sliding mode;

the upper end of each spline housing is fixed with synchronous pulley, and a plurality of synchronous pulleys pass through the hold-in range and connect, and one of them synchronous pulley is equipped with the fifth motor that drives its pivoted.

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