Full-automatic screw rod polishing system

Abstract

The utility model discloses a full-automatic screw rod polishing system, which belongs to the technical field of screw rod processing equipment and comprises a shielding bin, and a polishing platform, a mechanical arm and a polishing device which are arranged in the shielding bin, the polishing platform comprises a working step moving device and a plurality of jacking working steps, each jacking working step comprises two moving centers which are coaxially arranged and are respectively arranged on two sides of the working step moving device, and the two moving centers are used for jacking two ends of the screw rod; the mechanical arm and the polishing device are arranged at the top of the polishing platform, and the polishing device comprises a multi-dimensional moving device and a floating main shaft; the moving end of the multi-dimensional moving device is connected with a floating main shaft through a servo motor, and a polishing wheel is installed on the floating main shaft. According to the system, the shielding bin, the polishing platform, the mechanical arm, the polishing device and other key assemblies are integrated, and high automation of the steering lead screw polishing process is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of screw rod processing equipment, specifically to a full -automatic screw rod polishing system. BACKGROUND

[0002] At the moment of the vigorous development of new energy automobile industry, as the core component of the steering mechanism, the machining quality of the steering screw rod is directly related to the accurate realization of the automatic driving function. With the increasingly stringent requirements for vehicle control performance, the steering screw rod not only needs to have extremely high dimensional accuracy to ensure that the steering angle is accurate to the nearest millimeter, but also must meet stringent standards for surface finish to reduce frictional resistance, reduce wear and tear, and prolong service life. However, the current traditional polishing technology of the steering screw rod has become a bottleneck restricting the improvement of its quality. The traditional manual polishing method completely relies on the experience and skills of the operator. Due to the limitations of manual operation, it is difficult to ensure that each screw rod can achieve a high degree of consistent polishing accuracy, resulting in uneven product quality and failing to meet the needs of high-precision steering systems of new energy vehicles.

[0003] In addition, the working environment of the traditional manual polishing workshop is extremely poor. During the polishing process, a large amount of fine dust is generated, which diffuses in the air of the entire workshop, not only reducing the visibility of the workshop and affecting the operator's vision, but also increasing the risk of operation errors. Long-term inhalation of these dusts can cause serious harm to the respiratory system and skin of the operator, causing occupational diseases such as pneumoconiosis and skin disease. At the same time, manual polishing is inefficient and cannot meet the needs of large-scale production, resulting in prolonged production cycles, increased costs, and serious impact on the production efficiency and market competitiveness of new energy vehicles.

[0004] Therefore, it is urgent to develop a full-automatic steering screw rod polishing device to overcome the many defects of traditional polishing technology and improve the machining quality and production efficiency of the steering screw rod. SUMMARY

[0005] In view of the problems existing in the prior art, the utility model provides a full-automatic screw rod polishing system, which realizes high-precision automatic polishing of the steering screw rod.

[0006] The utility model is realized through the following technical schemes:

[0007] A full-automatic screw rod polishing system, comprising a shielding bin and a polishing platform, a mechanical arm and a polishing device arranged inside the shielding bin;

[0008] The polishing platform comprises a step moving device and a plurality of top holding steps, the top holding step comprises two moving centers arranged coaxially and arranged on both sides of the step moving device respectively, the two moving centers are used for top holding at both ends of the screw rod, and the step moving device is used for moving the screw rod to the next step;

[0009] The mechanical arm and the polishing device are arranged on the top of the polishing platform, and the mechanical arm is used for moving the lead screw to or out of the polishing platform;

[0010] The polishing device comprises a multi-dimensional moving device and a floating spindle, a moving end of the multi-dimensional moving device is connected with the floating spindle through a servo motor, and a polishing wheel is arranged on the floating spindle;

[0011] The floating spindle comprises a spindle, a floating sleeve and an elastic balancing structure;

[0012] The floating sleeve is sleeved on the spindle, can move along the axial direction of the spindle and is circumferentially positioned, and the two ends of the floating sleeve are respectively provided with the elastic balancing structure which is connected with the spindle.

[0013] Preferably, the polishing platform is respectively provided with a chain wheel transmission device at the two ends, a plurality of fixed blocks are arranged on the chain of the chain wheel transmission device at intervals, and a positioning groove for fixing the lead screw is arranged on the fixed block.

[0014] Preferably, the step moving device comprises a moving module, a fixed table, a fixed frame and a support block;

[0015] The moving module is a screw sliding block module, the fixed table is connected with the sliding block of the screw sliding block module, the fixed table is provided with a lifting device, the fixed frame is fixed on the top of the lifting device, a plurality of support blocks are symmetrically arranged on the two sides of the fixed frame, and a V-shaped groove for fixing the lead screw is arranged on the support block.

[0016] Preferably, the moving center includes a top-holding moving module, a rotating device and a center;

[0017] The rotating device is arranged on the sliding table of the top-holding moving module, the rotating device is provided with a chuck at the end of the rotating shaft, and the center is connected with the chuck.

[0018] Preferably, the multi-dimensional moving device comprises a polishing horizontal module and a polishing vertical module, and the polishing horizontal module and the polishing vertical module are linear modules;

[0019] The base of the polishing horizontal module is connected with the suspension frame, the sliding base of the polishing horizontal module is connected with the base of the polishing vertical module, the lower end of the sliding base of the polishing vertical module is connected with the servo motor, the output shaft of the servo motor is connected with the floating spindle, and the polishing horizontal module is used for driving the polishing wheel to move along the axial direction of the lead screw.

[0020] Preferably, the mechanical arm comprises a multi-dimensional moving arm and a clamping jaw mechanism;

[0021] The multi-dimensional motion arm comprises a horizontal mechanical arm module and a vertical mechanical arm module, the base of the horizontal mechanical arm module is connected with the top of the shielding bin, the moving direction of the horizontal mechanical arm module is the arrangement direction of the wire rod polishing process, the base of the vertical mechanical arm module is connected with the sliding seat of the horizontal mechanical arm module, and the sliding seat of the vertical mechanical arm module is connected with the clamping jaw mechanism.

[0022] Preferably, the clamping jaw mechanism comprises two clamping jaw cylinders, the two clamping jaw cylinders are arranged at intervals along the axial direction of the wire rod, two opposite clamping jaws are arranged on the clamping jaw cylinders, a clamping block is arranged on each clamping jaw, and a clamping groove is arranged on the clamping block.

[0023] Preferably, the polishing device comprises a plurality of polishing wheels with different roughnesses.

[0024] Preferably, the elastic balancing structure comprises an elastic device and a fixing member.

[0025] The fixing member is connected with the main shaft, the elastic device is located between the fixing member and the end of the floating sleeve, the elastic device is used for applying a pushing force to the floating sleeve and making the floating sleeve in a balanced position.

[0026] Preferably, the shielding bin is connected with a dust suction device.

[0027] Compared with the prior art, the full-automatic wire rod polishing system has the following beneficial technical effects:

[0028] The full-automatic wire rod polishing system of the present application realizes high automation of the wire rod polishing process by integrating key components such as a shielding bin, a polishing platform, a mechanical arm and a polishing device. The work step moving device and the top-holding work step on the polishing platform can accurately position and move the wire rod, ensuring the stability and accuracy of the polishing process. The multi-dimensional motion capability of the mechanical arm enables the wire rod to be flexibly transferred between the polishing platform, the feeding device and the discharging device, greatly improving the production efficiency. In particular, the multi-dimensional moving device and the floating main shaft design in the polishing device not only realize the multi-dimensional movement of the polishing wheel, but also ensure the close adhesion of the polishing wheel to the surface of the wire rod through the dynamic adjustment function of the floating main shaft, thereby improving the polishing precision. In addition, the design of the shielding bin effectively prevents the escape of dust generated during the polishing process, protecting the health of the operators, and the addition of the dust suction device further improves the dust handling capacity and reduces environmental pollution. In summary, the full-automatic wire rod polishing system has the characteristics of high efficiency, precision and environmental protection, and has shown significant technical advantages in the field of wire rod machining. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and for those of ordinary skill in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0030] Figure 1 It is a structure schematic view of the operating side of the screw rod polishing system of the present application.

[0031] Figure 2 It is a structure schematic view of the back side of the screw rod polishing system of the present application.

[0032] Figure 3 It is a structure schematic view of the screw rod polishing system of the present application.

[0033] Figure 4 It is a structure schematic view of the screw rod transmission device of the present application.

[0034] Figure 5 It is a structure schematic view of the internal structure of the transmission device of the present application.

[0035] Figure 6 It is a structure schematic view of the chain and the fixed block of the present application.

[0036] Figure 7 It is a structure schematic view of the polishing platform of the present application.

[0037] Figure 8 It is a structure schematic view of the screw rod step moving device of the present application.

[0038] Figure 9 It is a structure schematic view of the top holding device of the present application.

[0039] Figure 10 It is a structure schematic view of the polishing device and the mechanical arm of the present application.

[0040] Figure 11 It is a structure schematic view of the polishing device of the present application.

[0041] Figure 12 It is a structure schematic view of the floating spindle of the present application.

[0042] Figure 13 It is an axial sectional view of the floating spindle of the present application.

[0043] Figure 14 It is a structure schematic view of the mechanical arm of the present application.

[0044] In the figure: 1, main shaft; 2, profiled polishing wheel; 3, rotating shaft sleeve; 4, inner baffle; 5, floating sleeve; 6, compression spring; 7, outer baffle; 8, shaft pressing plate; 9, connecting sleeve; 10, wheel clamping plate; 11, wheel pressing plate; 12, large organ cover; 13, small organ cover; 14-16, bolts; 17, lock nut; 100, feeding device; 101, base; 102, fixed block; 103, conveying device; 104, driven shaft; 105, chain; 106, driving shaft; 107, guide groove; 200, polishing platform; 210, base; 220, work step moving device; 230, moving platform; 240, top holding device; 231, moving module; 232, fixed table; 233, fixed frame; 234, support block; 241, top holding moving module; 242, rotating device; 243, center; 300, discharging device; 400, mechanical arm; 410, suspension frame; 420, mechanical arm horizontal module; 430, mechanical arm vertical module; 440, clamping jaw cylinder; 450, clamping block; 500, polishing device; 510, polishing horizontal module; 520, polishing vertical module; 530, servo motor; 540, floating main shaft; 600, dust collection device; 700, steering screw; 800, suspension frame. DETAILED DESCRIPTION

[0045] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations.

[0046] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0047] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, thus, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0048] Reference Figures 1-14 An automatic screw rod polishing system includes a shielding bin, and a polishing platform 200, a mechanical arm 400, and a polishing device 500 arranged inside the bin;

[0049] The mechanical arm 400 and the polishing device 500 are suspended on the top of the polishing platform 200, and the polishing platform 200 is provided with the feeding device 100 and the discharging device 300 at two ends respectively, and the ends of the feeding device 100 and the discharging device 300 extend to the outside of the shielding bin.

[0050] The polishing platform 200 comprises a step moving device 220 and a plurality of top holding steps, the top holding step comprises two moving centers arranged coaxially and arranged on the two sides of the moving device respectively, the two moving centers are used for top holding at the two ends of the lead screw, and the step moving device 220 is used for moving the lead screw to the next step.

[0051] The mechanical arm 400 comprises a multi-dimensional motion arm and a clamping jaw mechanism, the fixed end of the multi-dimensional motion arm is connected with the top of the shielding bin, and the clamping jaw mechanism is connected with the moving end of the multi-dimensional motion arm, and the clamping jaw mechanism is used for moving the lead screw to the polishing platform, the feeding device 100 or the discharging device 300.

[0052] The polishing device 500 comprises a multi-dimensional moving device and a floating spindle 540, the fixed end of the multi-dimensional moving device is connected with the top of the shielding bin, the moving end of the multi-dimensional moving device is connected with the floating spindle 540 through a servo motor, and the floating spindle is provided with a polishing wheel.

[0053] Referring to Figure 1 and 2 , the shielding bin is used for preventing dust from escaping during polishing, the operation side of the shielding bin is provided with a shielding door, the polishing state of the lead screw can be detected by opening the shielding door, and the polishing lead screw can also be checked, the shielding door can be a sliding door or a flat sliding door, and preferably a sliding door, and the sliding door is installed on the operation side of the shielding bin through a track.

[0054] The dust collection device comprises a dust collection device and a plurality of dust collection pipes, the plurality of dust collection pipes are arranged on the top of the shielding bin in the direction of the polishing step at intervals, the plurality of dust collection pipes are communicated with a main pipeline, the main pipeline is connected with the dust collection device, the dust collection device adopts a negative pressure principle to adsorb dust in the shielding bin and recycle to a dust accumulation bin, so as to solve the problem of dust escaping and polluting the environment during polishing.

[0055] The two ends of the shielding bin are provided with mounting holes, the discharging end of the feeding device extends into the shielding bin through the mounting holes, and the feeding end of the discharging device 300 extends into the shielding bin through the mounting holes, so that the feeding and discharging of the lead screw are located outside the shielding bin during the entire polishing process, workers are prevented from entering the shielding bin, and the problem of dust affecting health is solved.

[0056] Referring to Figure 4 and 5 , the feeding device 100 and the discharging device 300 have the same structure, and only the structure of the feeding device will be described in detail below.

[0057] The feeding device 100 comprises a base 101, a conveying module and a fixing block 102;

[0058] The conveying module is arranged on the top of the base 101, the transmission direction of the conveying module is the arrangement direction of the polishing steps, and a plurality of fixing blocks are symmetrically arranged on the two sides of the conveying module, the top of the fixing block is provided with a V-shaped groove, and the two ends of the lead screw are respectively overlapped on the two fixing blocks.

[0059] The conveying module is a chain wheel transmission module, which comprises a conveying device 103, a driven shaft 104, a chain 105, a driving shaft 106 and a guide groove 107; the driven shaft 104 and the driving shaft 106 are respectively arranged at the two ends of the conveying device 103, the driven shaft 104 and the driving shaft 106 are connected through the chain 105, the driving shaft 106 is connected with the motor, a plurality of fixing blocks are arranged on the chain 105 at intervals, the chain rotates to drive the fixing blocks to move, thereby realizing the feeding and discharging of the lead screw.

[0060] In this embodiment, sprockets are arranged at the two ends of the driven shaft and the driving shaft, and chains are arranged on the sprockets, the two chains are arranged at intervals along the axial direction of the driving shaft, the lead screw is supported on the fixing blocks of the two chains, and the transmission of the lead screw is realized.

[0061] Referring to Figures 7-9 The polishing platform comprises a base 210, a step moving device 220, a moving platform 230 and a top holding device 240.

[0062] The middle part of the base 210 is provided with a groove, the length direction of the groove extends along the arrangement direction of the steps, the step moving device 220 is arranged in the groove, the moving platform 230 is installed on the top of the step moving device 220 through the lifting device, a plurality of top holding steps are arranged at intervals along the moving direction of the moving platform 230, and the two moving tips of each top holding step are coaxially arranged on the base and located on the two sides of the moving platform.

[0063] It can be understood that the number of top holding steps is directly related to the polishing process of the lead screw, for example, the polishing of the lead screw includes rough polishing, medium polishing and fine polishing, and three polishing steps are correspondingly arranged, and three polishing devices are correspondingly arranged; for another example, the polishing of the lead screw includes rough polishing and fine polishing, and two polishing steps are correspondingly arranged, and two polishing devices are correspondingly arranged. Similarly, one polishing step can also be arranged to only perform rough polishing or fine polishing of the lead screw.

[0064] Referring to Figure 8 The step moving device 220 comprises a moving module 231, a fixed table 232, a fixed frame 233 and a supporting block 234; the moving module 231 is a lead screw sliding block module, the lead screw is connected with the motor, the sliding block is arranged on the track, the sliding block is rotatably connected with the lead screw, the fixed table is fixedly connected with the sliding block, and the rotation of the lead screw drives the sliding block to move the fixed table.

[0065] The fixing table is provided with a plurality of lifting devices, the fixing frame is fixed on the top of the lifting device, a plurality of supporting blocks are symmetrically arranged on both sides of the fixing frame, and the supporting blocks are provided with V-shaped grooves for fixing the lead screws.

[0066] Referring to Figure 9 , the mobile center includes a top-holding mobile module 241, a rotating device 242 and a center 243;

[0067] The top-holding mobile module 241 is a lead screw sliding block mobile module, which has the same structure as the mobile module 231, only the model is different, the rotating device 242 is arranged on the sliding table of the top-holding mobile module 241, the rotating shaft end of the rotating device 242 is provided with a chuck, and the center 243 is connected with the chuck.

[0068] The rotating device 242 includes a motor and a rotating shaft, the output shaft of the motor is engaged with the rotating shaft through a gear set, the chuck is connected with the rotating shaft, and in the polishing process, the rotating shaft drives the lead screw to rotate.

[0069] The two mobile centers are coaxially and spaced apart, in the polishing process, the two centers move towards the lead screw, the center is on both ends of the lead screw, and the lead screw is driven to rotate, and the polishing device polishes the lead screw.

[0070] In another embodiment, the other mobile center is a driven center, which includes a shaft seat, a rotating shaft is installed in the shaft seat, the shaft seat is installed on the sliding table of the top-holding mobile module 241, and the rotating shaft is driven to rotate by the lead screw.

[0071] The lifting device is an electric push rod or an electric lifting rod, the fixed frame is driven to move by the lifting device, in the polishing process, the fixed frame is lowered, so that the supporting block is separated from the lead screw.

[0072] Referring to Figure 10 , the mechanical arm 400 and the polishing device 500 are installed at the bottom of the suspension frame 800, the suspension frame 800 is installed at the top of the shielding bin, and the mechanical arm 400 and the polishing device 500 are located at the top of the polishing platform 200.

[0073] The feeding device 100 and the discharging device 300 are arranged apart from the polishing platform, the mechanical arm 400 is used to move the lead screw from the feeding device 100 to the polishing platform, and after the polishing is completed, the lead screw is moved from the polishing platform to the feeding device by the mechanical arm 400, so that the lead screw is fully automatically polished.

[0074] Referring to Figure 14 , the two mechanical arms are arranged at both ends of the suspension frame, and are used to feed and discharge the lead screw respectively, the mechanical arm 400 includes a multi-dimensional motion arm and a clamping jaw mechanism.

[0075] The multi-dimensional motion arm comprises a suspension frame 410, a horizontal mechanical arm module 420 and a vertical mechanical arm module 430; the upper end of the suspension frame 410 is connected with the suspension frame 800, the base of the horizontal mechanical arm module 420 is fixedly connected with the lower end of the suspension frame 410, the base of the vertical mechanical arm module 430 is connected with the sliding base of the horizontal mechanical arm module 420, the sliding base of the vertical mechanical arm module 430 is connected with the fixed plate, and the clamping jaw mechanism is connected with the fixed plate.

[0076] The horizontal mechanical arm module 420 and the vertical mechanical arm module 430 are the same in structure, and are both linear modules of a screw sliding block, and the difference lies in the installation direction, the sliding base of the horizontal mechanical arm module 420 moves horizontally, the sliding base of the vertical mechanical arm module 430 moves vertically, and the two-dimensional movement of the clamping jaw mechanism is realized.

[0077] The clamping jaw mechanism comprises two clamping jaw cylinders 440, the two clamping jaw cylinders 440 are arranged in the axial direction of the screw and are spaced apart, two clamping jaws that move relative to each other are arranged on each clamping jaw cylinder 440, a clamping block 450 is arranged on each clamping jaw, and a clamping groove in a C-shaped structure is arranged on the clamping block.

[0078] Referring to Figure 11 , a plurality of polishing devices are arranged on the suspension frame, and the number of the polishing devices depends on the number of polishing steps, that is, the number of polishing processes.

[0079] The polishing device comprises a multi-dimensional movement device and a floating spindle 540, and the multi-dimensional movement device comprises a polishing horizontal module 510, a polishing vertical module 520 and a servo motor 530.

[0080] The base of the polishing horizontal module 510 is fixed on the cross beam of the suspension frame through a clamping plate 550, the sliding base of the polishing horizontal module 510 is connected with the base of the polishing vertical module 520, the lower end of the sliding base of the polishing vertical module 520 is connected with the servo motor 530 through a connecting disc, and the output shaft of the servo motor 530 is connected with the floating spindle.

[0081] The polishing horizontal module 510 and the polishing vertical module 520 are the same in structure, and are both linear modules of a screw sliding block, and the difference lies in the installation direction, the sliding base of the polishing horizontal module 510 moves horizontally, the sliding base of the polishing vertical module 520 moves vertically, and the two-dimensional movement of the floating spindle 540 is realized.

[0082] Referring to Figure 12 and 13 , an axial floating spindle comprises a spindle 1, a floating sleeve 5 and an elastic balance structure.

[0083] The floating sleeve 5 is sleeved on the spindle, the floating sleeve 5 can move in the axial direction of the spindle and is circumferentially positioned, the two ends of the floating sleeve 5 are respectively provided with the elastic balance structure, and the elastic balance structure is connected with the spindle 1.

[0084] The elastic balance structure comprises elastic devices and fixing members;

[0085] The fixing members are connected with the main shaft, and the elastic devices are located between the fixing members and the ends of the floating sleeve 5, and are used for applying a pushing force to the floating sleeve and keeping the floating sleeve in a balanced position.

[0086] The axial floating main shaft is provided with a floating sleeve, and elastic devices are arranged at both ends of the floating sleeve, the floating sleeve is kept in a balanced position by the pushing force applied by the two elastic devices, and when the floating main shaft is applied to a polishing machine, the axial position of the profiled polishing wheel is dynamically adjusted, the profiled polishing wheel is self-corrected and positioned with the steering screw rod, and the polishing precision of the steering screw rod is improved.

[0087] The floating sleeve 5 is connected with the main shaft through splines, so that the floating sleeve 5 can move along the axial direction of the main shaft and be positioned in the circumferential direction.

[0088] At least one spline is arranged on the outer surface of the main shaft 1 in the axial direction, the floating sleeve 5 has a sleeve structure, and a spline groove matched with the spline is arranged in the inner hole of the floating sleeve, the floating sleeve is sleeved on the main shaft, and the spline and the spline groove are matched, so that the floating sleeve can move along the axial direction of the main shaft, and the spline can position the floating sleeve in the circumferential direction.

[0089] The elastic devices are spiral compression springs 6, disc springs and elastic rubbers, and preferably are compression springs.

[0090] The compression spring 6 is sleeved on the main shaft, one end of the compression spring 6 abuts against the fixing member, the other end of the compression spring 6 abuts against the end of the floating sleeve, and the two compression springs are located at the two ends of the floating sleeve respectively, so that a pushing force is applied to the floating sleeve and the floating sleeve is kept in a balanced position, and the balanced position is the matching position of the profiled polishing wheel and the groove of the steering screw rod.

[0091] The fixing members are baffles, and are an inner baffle 4 and an outer baffle 7, the inner baffle 4 is arranged at one end of the main shaft close to the driving source, the outer baffle 7 is arranged at one end of the main shaft away from the driving source, the baffles have a circular ring structure, the two baffles are fixedly sleeved on the two ends of the main shaft, and the ends of the compression springs abut against the end faces of the baffles; for example, nuts are arranged at the two ends of the baffles to fix the baffles.

[0092] The elastic balance structure is provided with a protection device to prevent dust in polishing from entering between the main shaft and the floating sleeve.

[0093] The protection device is an organ case, and is a large organ case 12 and a small organ case 13, the organ case is sleeved on the main shaft and located outside the compression spring, one end of the organ case is connected with the end of the floating sleeve, the other end of the organ case is connected with the baffle through a wheel pressing plate 8, and the end of the main shaft is further provided with a lock nut 17, and the lock nut 17 is in contact with the wheel pressing plate 8.

[0094] The main shaft is sleeved with a rotating shaft sleeve 3, and the floating sleeve is sleeved on the rotating shaft sleeve 3 through a spline, the main shaft and the floating sleeve are isolated through the rotating shaft sleeve 3, the floating sleeve moves axially on the rotating shaft sleeve, the rotating shaft sleeve is fixedly connected with the main shaft, and the compression spring is sleeved on the rotating shaft sleeve, so that the main shaft and the floating sleeve are isolated through the rotating shaft sleeve, the wear of the main shaft is avoided, the maintenance cost of the main shaft is reduced, and the polishing precision is improved.

[0095] Optionally, one end of the main shaft is provided with a connecting structure for connecting a transmission shaft of a servo motor.

[0096] The floating sleeve is provided with a polishing wheel fixing device, and the polishing wheel fixing device is connected with the profiling polishing wheel.

[0097] The polishing wheel fixing device comprises wheel clamping plates 10 and wheel pressing plates 11 which are arranged at intervals and are fixedly sleeved on the floating sleeve, the profiling polishing wheel 2 is press-fitted between the wheel clamping plates 10 and the wheel pressing plates 11, and the wheel clamping plates 10 and the wheel pressing plates 11 are connected through bolts 15.

[0098] The floating sleeve 5 is fixedly sleeved with a connecting sleeve 9, one end of the connecting sleeve 9 is provided with an end plate, the wheel clamping plate 10 is in contact with the end plate, the bolts 15 are sequentially connected through the wheel pressing plate 11, the wheel clamping plate 10 and the end plate, and the connecting sleeve 9 is connected with the annular ear plate at the end of the floating sleeve through a bolt 16.

[0099] In work, the main shaft is connected with the output shaft of the servo motor, the main shaft is driven to rotate by the servo motor, the polishing wheel is driven to rotate synchronously by the rotating sleeve, the floating sleeve and the polishing wheel fixing device, the polishing wheel can axially float under the action of the two compression springs on both sides of the rotating sleeve, the polishing wheel remains in a balanced position when it is not subjected to an axial force, when the polishing wheel is not aligned with the groove of the lead screw, the polishing wheel axially slides under the action of the axial force of the lead screw groove until it is aligned with the groove, and the polishing wheel returns to the balanced position under the action of the two compression springs when it is separated from the groove of the lead screw.

[0100] Next, the working principle of the full-automatic lead screw polishing system is described in detail by taking the lead screw 700 as an example.

[0101] Firstly, the lead screw is placed on the fixed block of the feeding device, the two ends of the lead screw are overlapped in the V-shaped groove of the fixed block, the motor of the conveying module is started, the motor drives the driving wheel to rotate, the driving wheel and the driven wheel drive the chain to rotate, and then the fixed block moves the lead screw to the polishing platform.

[0102] When the steering screw moves to the front end of the feeding device, the mechanical arm starts to work. The horizontal module 420 and the vertical module 430 of the mechanical arm cooperate with each other to move the clamping jaw mechanism to the position of the steering screw. The two clamping jaw cylinders are closed to realize the movement of the screw. Then the vertical module of the mechanical arm rises, and the horizontal module of the mechanical arm moves to the polishing platform, moving the steering screw to the top of the polishing platform.

[0103] The lifting device drives the moving platform to rise, and the mechanical arm places the steering screw on the support block of the moving platform. The work step moving device 220 moves to horizontally move the steering screw to the first top holding work step. The two moving modules 241 of the moving top center drive the top center 243 to move to the end of the steering screw until the top center is in contact with the end of the steering screw and remains. Then the lifting device drives the moving platform to descend, so that the support block is separated from the steering screw.

[0104] The polishing horizontal module 510 and the polishing vertical module 520 of the polishing device move to align the polishing wheel with the position of the steering screw. The servo motor drives the polishing wheel to rotate to polish the steering screw. At the same time, the steering screw rotates under the drive of the rotating shaft. In the polishing process, the polishing horizontal module 510 controls the polishing wheel to move in the axial direction of the moving feed shaft to realize the polishing of the steering screw.

[0105] When the rough polishing of the steering screw is completed, the lifting device drives the moving platform to rise so that the steering screw is located on the support block. Then the two moving top centers move in the opposite direction to separate from the steering screw. The moving module 231 drives the steering screw to move downward to the work step, and the above-mentioned top holding and polishing process is repeated. When all the polishing processes are completed, another mechanical arm moves the steering screw to the discharging device. The moving process is the same as the movement of the steering screw to the polishing platform, which will not be described here. The discharging device completes the output of the steering screw, and thus the whole automatic polishing process of the steering screw is completed.

[0106] The automatic steering screw polishing system realizes high-precision automatic polishing of the steering screw through the precise cooperation of the mechanical arm and the polishing device. The design of the floating spindle enables the polishing wheel to dynamically adjust the axial position, realizing self-calibration positioning with the steering screw, thereby improving the polishing precision. The design of the shielding bin effectively prevents the dust generated during polishing from escaping, protecting the health of the operators. The dust suction device further enhances the dust handling capacity and reduces environmental pollution.

[0107] The automatic operation process of the automatic steering screw polishing system reduces manual intervention and significantly improves the polishing efficiency. The system can continuously and stably perform polishing work, shortening the production cycle. Automatic polishing avoids the problem of inconsistent polishing precision caused by manual operation, so that each screw can achieve a high degree of consistent polishing standard. This helps to improve the overall quality of the steering screw and meets the demand of high-precision steering system of new energy vehicles.

[0108] The initial investment of the full-automatic polishing system can be high, but in the long run, it can reduce labor costs and rework costs caused by quality problems. At the same time, the efficient operation of the system also reduces energy consumption and maintenance costs. Avoiding long-term exposure of workers to harsh polishing environments reduces the risk of occupational diseases. The mechanized operation process reduces the possibility of human operation errors and improves job safety.

[0109] In summary, the full-automatic lead screw polishing system not only improves polishing precision and production efficiency, but also improves the working environment, guarantees product quality, reduces production costs, and improves safety. These advantages make the system have broad application prospects and important market value in the new energy automobile industry.

[0110] The above content only illustrates the technical idea of the utility model, and cannot limit the protection scope of the utility model, and any modification made on the basis of the technical scheme according to the technical idea of the utility model falls within the protection scope of the utility model claim.

Claims

1. A fully automated ball screw polishing system, characterized by, The polishing platform, the mechanical arm and the polishing device are arranged in the shielding bin. The polishing platform comprises a step moving device and a plurality of top holding steps, the top holding step comprises two coaxially arranged moving centers and is arranged on both sides of the step moving device, the two moving centers are used for top holding at both ends of the screw rod, and the step moving device is used for moving the screw rod to the next step. The mechanical arm is used for moving the screw rod to the polishing platform or moving out of the polishing platform. The polishing device comprises a multi-dimensional moving device and a floating spindle, a moving end of the multi-dimensional moving device is connected with the floating spindle through a servo motor, and a polishing wheel is arranged on the floating spindle. The floating spindle comprises a spindle, a floating sleeve and an elastic balancing structure. The floating sleeve is sleeved on the spindle, the floating sleeve can move along the axial direction of the spindle and is circumferentially positioned, both ends of the floating sleeve are respectively provided with the elastic balancing structure, and the elastic balancing structure is connected with the spindle.

2. The fully automatic ball screw polishing system according to claim 1, wherein Both ends of the polishing platform are respectively provided with a chain wheel transmission device, a plurality of fixed blocks are arranged on the chain of the chain wheel transmission device at intervals, and a positioning groove for fixing the screw rod is arranged on the fixed block.

3. The fully automated ball screw polishing system of claim 1, wherein, The step moving device comprises a moving module, a fixed table, a fixed frame and a supporting block. The moving module is a screw block module, the fixed table is connected with the sliding block of the screw block module, the fixed table is provided with a lifting device, the fixed frame is fixed on the top of the lifting device, a plurality of supporting blocks are symmetrically arranged on both sides of the fixed frame, and a V-shaped groove for fixing the screw rod is arranged on the supporting block.

4. The fully automated ball screw polishing system of claim 1, wherein, The moving center comprises a top holding moving module, a rotating device and a center. The rotating device is arranged on the sliding table of the top holding moving module, the rotating shaft end of the rotating device is provided with a chuck, and the center is connected with the chuck.

5. The fully automated ball screw polishing system of claim 1, wherein, The multi-dimensional moving device comprises a polishing horizontal module and a polishing vertical module, and the polishing horizontal module and the polishing vertical module are linear modules. The base of the polishing horizontal module is connected with the suspension frame, the sliding base of the polishing horizontal module is connected with the base of the polishing vertical module, the lower end of the sliding base of the polishing vertical module is connected with the servo motor, the output shaft of the servo motor is connected with the floating spindle, and the polishing horizontal module is used for driving the polishing wheel to move along the axial direction of the screw rod.

6. The fully automated ball screw polishing system of claim 1, wherein, The mechanical arm comprises a multi-dimensional motion arm and a clamping jaw mechanism. The multi-dimensional motion arm comprises a mechanical arm horizontal module and a mechanical arm vertical module, the base of the mechanical arm horizontal module is connected with the top of the shielding bin, the moving direction of the mechanical arm horizontal module is the arrangement direction of the screw rod polishing process, the base of the mechanical arm vertical module is connected with the sliding base of the mechanical arm horizontal module, and the sliding base of the mechanical arm vertical module is connected with the clamping jaw mechanism.

7. The fully automated ball screw polishing system of claim 6, wherein, The clamping jaw mechanism comprises two clamping jaw cylinders, the two clamping jaw cylinders are arranged at intervals along the axial direction of the screw rod, the clamping jaw cylinder is provided with two oppositely moving clamping jaws, each clamping jaw is provided with a clamping block, and the clamping block is provided with a clamping groove.

8. The fully automated ball screw polishing system of claim 1, wherein, The number of the polishing devices is multiple, and the multiple polishing devices are provided with polishing wheels with different roughnesses.

9. The fully automated ball screw polishing system of claim 1, wherein, The elastic balancing structure comprises an elastic device and a fixing piece. The fixing piece is connected with the spindle, the elastic device is located between the fixing piece and the end of the floating sleeve, the elastic device is used for applying a pushing force to the floating sleeve and making the floating sleeve in a balanced position.

10. The fully automated ball screw polishing system of claim 1, wherein, The shielding bin is connected with the dust collection device.

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