200 results about "Centerless grinding" patented technology

The invention relates to the technical field of grinding wheel monitoring, in particular to a centerless grinding machine full-life-cycle grinding wheel state monitoring system and method.According to the centerless grinding machine full-life-cycle grinding wheel state monitoring system and method, through combined difference extraction of a main shaft current mean value fluctuation ratio and a power gradient continuous variation value and assisted by transverse comparison of periodic response intervals, effective recognition of time period boundaries of working condition states is achieved; according to the method, operation stage division does not depend on static threshold judgment any more, a track trend is established through linkage judgment of an amplitude kick point and a slope extreme value, a dynamic evolution path of signal response is clearer, the identification resolution of abnormal changes and local deviation trends is improved, response synchronous identification of parameter state changes is achieved, and the identification accuracy is improved. In multi-signal collaborative analysis, directivity comparison between a temperature rise mutation fragment and a current residual error response is carried out, so that the consistency analysis capability of response logic between different monitoring paths is enhanced, and the real-time performance, stability and anti-interference capability of state identification are improved.

The invention relates to the technical field of industrial control, in particular to an intelligent centerless grinding machine cooling system and method for difficult-to-machine materials, and the system comprises a multi-source sensing unit, an edge calculation module, a decision center module, a precise execution module and a digital immune memory bank; compared with the defects that in the prior art, monitoring depends on a single temperature sensor, thermal field sensing is incomplete, thermal damage early warning lags behind and the like, according to the scheme, grinding power frequency spectrum, acoustic emission signals, triaxial vibration and coolant mass spectrum data are collected in real time through a multi-source sensing unit, and a micron-sized temperature field is reconstructed in combination with an edge end space-time diagram convolutional network; full-dimensional monitoring of the grinding thermal-mechanical coupling effect is achieved, and thermal anomaly recognition sensitivity and early warning timeliness are remarkably improved.

The utility model belongs to the technical field of centerless grinding machines, and particularly relates to a high-precision centerless grinding machine for valve bridge machining, which comprises a grinding machine body, a grinding wheel and a sliding seat are respectively arranged on two sides of the top of the grinding machine body, the sliding seat is transversely and slidably arranged on the grinding machine body, and an adjusting mechanism is arranged between the grinding machine body and the sliding seat. A guide wheel seat sliding transversely is arranged on the sliding seat, an automatic tool retracting mechanism is arranged between the guide wheel seat and the sliding seat, a guide wheel is arranged on the guide wheel seat, and the grinding machine body is provided with a bearing support between the grinding wheel and the guide wheel. Compared with the prior art, the centerless grinding machine has the advantages that on the basis of original manual adjustment of the advancing and retreating stroke, the advancing and retreating stroke of the guide wheel during workpiece replacement is controlled by additionally arranging the high-precision gear and the rack, so that the safety distance of a clamped workpiece is increased, the tool retracting amount and the tool feeding amount can be freely adjusted according to workpieces of different sizes, manual operation steps are reduced, and the working efficiency is improved. And the reloading efficiency of the workpiece is improved, so that the productivity is improved.

The invention discloses a centerless grinding machine grinding wheel guide wheel center height and end face combination adjusting device and a centerless grinding machine, which realize the adjustment of the center height and end face parallel difference of a guide wheel and a grinding wheel, simplify the adjusting process and reduce manual intervention, thereby improving the production efficiency. According to the centerless grinding machine, a guide wheel frame of the centerless grinding machine achieves grinding angle rotation through an eccentric rotation shaft, the eccentric rotation shaft is provided with a centering sliding block, and axial displacement adjustment of a guide wheel main shaft system is achieved through a sliding block displacement adjusting device. A grinding wheel spindle system is arranged on one side of the guide wheel spindle system; an eccentric shaft fastening screw is arranged on the guide wheel main shaft system and is used for fastening the guide wheel frame and the eccentric rotating shaft into a whole; the centering sliding block and the sliding block displacement adjusting screw rod are both installed in the guide wheel frame installation fixing body, the centering sliding block is matched with the fixing body sliding groove, one end of the sliding block displacement adjusting screw rod is connected with the centering sliding block, and the other end of the sliding block displacement adjusting screw rod extends out of the guide wheel frame installation fixing body and is connected with the adjusting screw rod fixing frame.

A centerless grinding machine comprises a supporting piece seat, a grinding wheel and a guide wheel, the supporting piece seat is used for supporting a workpiece and located between the grinding wheel and the guide wheel, the guide wheel makes contact with the workpiece to drive the workpiece to rotate during machining, the grinding wheel conducts grinding machining on the surface of the workpiece, the workpiece to be machined comprises a structure A, and a structure B with the outer diameter larger than that of the structure A is arranged on the structure A; a plurality of slopes used for containing the structure A are arranged on the supporting piece base, a plurality of containing grooves used for containing the structure B are formed in the peripheral sides of the grinding wheel and the guide wheel, and the grinding wheel is used for grinding the peripheral side surface of the structure A. According to the centerless grinding machine, workpieces with at least two continuous or discontinuous areas with different outer diameters in the axial direction can be machined, the limitation that traditional equipment can only machine single cylindrical workpieces is broken through, a plurality of workpieces can be stably supported and machined at a time, and the machining efficiency is greatly improved.

The invention belongs to the field of medical titanium alloy material processing, and particularly relates to a preparation method of a high-strength titanium-zirconium alloy wire. The Ti-Zr alloy comprises the following chemical components in percentage by mass: 13.5-16.5% of Zr, less than or equal to 0.10% of Fe, less than or equal to 0.10% of C, less than or equal to 0.015% of H, less than or equal to 0.6% of O, less than or equal to 0.05% of N and the balance of Ti. Firstly, a round bar blank with a certain size is obtained through the procedures of smelting, forging and drawing; and then a finished wire is prepared in the modes of temperature-controlled drawing, stress relief annealing and centerless grinding. By means of the method, the high-strength titanium-zirconium alloy wire with Rm larger than or equal to 950 MPa and A larger than or equal to 10% can be obtained, the problems that the implant material Ti-Zr alloy is low in strength and the like are solved, the high-strength titanium-zirconium alloy wire for dental products can be produced through the method, and qualified raw materials are provided for the dental implant products.

The utility model provides a tool for a centerless grinding machine to grind bars and wires, and relates to the technical field of metal bar and wire machining, the tool comprises a tool bottom plate and a feeding lifting frame, and the tool bottom plate and the feeding lifting frame are connected through a supporting seat component; the feeding lifting frame comprises an upper guide pressing plate and a lower guide supporting plate which are fixed through a hooping device, the upper guide pressing plate and the lower guide supporting plate are provided with an upper nylon damping plate and a lower nylon damping plate respectively, and a spindle-shaped clamping hole is formed between the upper nylon damping plate and the lower nylon damping plate in a linear penetrating mode in the length direction. The ratio of the length of the feeding lifting frame to the height of the spindle-shaped clamping hole is larger than 50: 1. The upper nylon damping plate and the lower nylon damping plate are used for clamping the to-be-machined metal bar and wire, soft fixing is achieved, based on large-size fixing that the ratio of the length of the feeding lifting frame to the height of the spindle-shaped clamping hole is larger than 50: 1, the bending phenomenon of the to-be-machined metal bar and wire is prevented, straightening is carried out in advance, and straightening cannot directly affect the surface quality of the to-be-machined metal bar and wire.

The application discloses a preparation method of a zirconium alloy rod for a nuclear fuel assembly end plug, and comprises the following steps: first, a zirconium alloy forging rod is subjected to machining and lubrication, heated and kept warm, and then extruded, and after extrusion, the extruded rod blank is obtained by sequentially performing straightening and polishing treatment; second, the extruded rod blank is heated and kept warm again, and then subjected to multi-pass hot rolling, and after hot rolling, the hot-rolled rod blank is obtained by centerless peeling; third, the hot-rolled rod blank is subjected to multi-pass pilger two-roll cold rolling to obtain a cold-rolled rod blank; fourth, the cold-rolled rod blank is subjected to vacuum annealing treatment to obtain an annealed rod blank; and finally, the annealed rod blank is subjected to finishing treatment, which sequentially comprises straightening, centerless grinding and degreasing, so that the target product is obtained; and the key parameters such as temperature, holding time and deformation amount of each step are strictly controlled. The preparation method breaks through the key technology of long rod cold rolling, realizes large plastic deformation of the zirconium alloy rod, significantly reduces deformation passes and intermediate heat treatment, and thus breaks through the problems of non-uniform structure, low production efficiency and insufficient product precision and the like existing in the traditional process.

The invention relates to the technical field of industrial machine tools, discloses an integrated quartz tube processing machine tool based on flexible traction, and aims at solving the problems that when a centerless grinding machine supports a quartz tube through line contact, due to the fact that the surface of a workpiece protrudes abnormally, limiting is poor, movement is prone to occurring, and the processing quality is affected. A guide wheel and a polishing wheel are arranged at the top; an arc-shaped opening is formed in the guide wheel, a flexible traction assembly is arranged in the guide wheel, the guide wheel comprises a flexible conveying belt, two groups of symmetrical limiting assemblies are arranged in the guide wheel and are supported from the inner wall of the flexible conveying belt, so that a semi-wrapped quartz tube workpiece is in surface contact, and a yielding assembly is arranged at the end part of each limiting assembly and comprises a telescopic inner column, an outer cylinder and a proximity sensor; according to the machine tool, the supporting area is enlarged through surface contact, the stability is improved through local yielding of the limiting assembly, targeted polishing and automatic reset of protrusions are achieved in combination with the proximity sensor, the machining precision and smoothness of quartz tubes are improved, the cracking risk and the rejection rate are reduced, and the production efficiency is optimized.

The utility model discloses a centerless grinding machine with a cooling liquid circulating mechanism, which relates to the technical field of machining equipment and comprises a machine body, a control cabinet is fixedly connected to the left side of the machine body, and a guide wheel is fixedly connected to the right side of the top end of the machine body. According to the centerless grinding machine with the cooling liquid circulating mechanism, through the arrangement of the first centrifugal pump, the cooling box, the booster pump and the liquid spraying nozzle, when the centerless grinding machine is used, cooling liquid is sprayed out of the liquid spraying nozzle, high-temperature deformation of workpieces is prevented, the sprayed cooling liquid is gathered downwards and falls into the water receiving pipe, and the cooling liquid is pumped into the cooling box through the first centrifugal pump after being filtered in the filtering box; and finally, the heated cooling liquid is cooled again through cooling inside the cooling box and heat dissipation outside the fan, the cooled cooling liquid is pumped into the sterilization box through the second centrifugal pump, the filtered and cooled cooling liquid in the sterilization box is pumped into the booster pump through the liquid pumping pipe again during next grinding, the cooling liquid is sprayed out downwards from the liquid spraying nozzle, and circulation is repeated.

The utility model relates to a workpiece support of a centerless grinding machine, and relates to the technical field of grinding machines. The workpiece support of the centerless grinding machine comprises a cutting board support and a feeding board support, feeding boards are fixed to the feeding board support, a feeding channel used for conveying workpieces is formed between the two feeding boards, the cutting board support comprises a fixing block and a lower cutting board, the fixing block is fixed to a base of the centerless grinding machine, and the lower cutting board is fixed to the side, away from a guide wheel of the centerless grinding machine, of the fixing block. The feeding plate support comprises a fixed base fixed to a centerless grinding machine base and two coarse adjusting blocks, the two feeding plates are fixed to the upper ends of the two coarse adjusting blocks respectively, a protruding block in the width direction of the feeding channel is fixed to the upper end of the fixed base, and sliding grooves allowing the protruding block to slide are formed in the lower ends of the two coarse adjusting blocks. First fasteners are arranged on the coarse adjusting blocks, and after the two coarse adjusting blocks slide to adjust the distance between the two coarse adjusting blocks, the coarse adjusting blocks and the fixed base are fixed through the first fasteners. The feeding device has the effect of conveniently adjusting the width of the feeding channel.

The automatic feeding device comprises a feeding base assembly connected with the centerless grinding machine, a linear vibrator is arranged at the upper end of the feeding base assembly, an automatic feeding rail is arranged at the upper end of the linear vibrator, a feeding groove is formed in the upper end of the automatic feeding rail, and a feeding groove is formed in the lower end of the automatic feeding rail. The cross section of the feeding groove is in a funnel shape. According to the automatic bar grinding machine, manual feeding is changed into manual feeding, then the straight vibration automatic feeding device is used for feeding, the labor intensity of production personnel is greatly reduced, operation is easy and convenient, the safety performance is high, only a plurality of bars need to be manually placed on the feeding track, the bars enter the machine along with vibration of the feeding track for grinding, and the production efficiency is greatly improved. Meanwhile, manual feeding is replaced with mechanical feeding, the quality problem caused by carelessness of workers is avoided, the production quality can be guaranteed, the production efficiency can be improved, and production personnel can reasonably arrange the operation time.

The utility model relates to a polishing machine material supporting device discloses a centerless grinding machine material supporting and conveying device, including the material discharging box and the fixed plate, the top fixed connection of fixed plate has drive assembly, the top fixed connection of drive assembly has the connecting plate, the top fixed connection of connecting plate has a plurality of stockpile board, the inside fixed connection of material discharging box has a plurality of placement board, the rear side fixed connection of material discharging box has power assembly, the outside fixed connection of power assembly has abrasive roller, the left side fixed connection of power assembly has the rotating wheel no.

A method for fabricating a segmented electrode is provided. The method includes performing a series of progressive die stamping operations on a foil sheet of material to form an initial electrode, and removing portions of the initial electrode using a centerless grinding process to form a segmented electrode including a plurality of circumferentially spaced contacts.

An Inconel 718 dodecagonal countersunk bolt upsetting technology is characterized by comprising the following steps that blanking is conducted, specifically, blanking is conducted through a lathe according to the actual use length and diameter of a bolt; core grinding is conducted, specifically, the outer circle of the blanked blank is ground; lubricating: the blank subjected to centerless grinding is lubricated by adopting copper plating; and upsetting is conducted, specifically, the lubricated blank piece is heated and put into an upsetting mold after reaching the set temperature, upsetting is conducted through a punching machine, the columnar blank piece is subjected to one-time upsetting forming, and the bolt polish rod is machined. According to the technology, one-time upsetting forming can be achieved, the defects caused by traditional multiple-time upsetting forming are overcome, the consistency of the part size and the product quality can be guaranteed, the production efficiency can be improved, the cost can be reduced, and the technology has very high practicability and is suitable for being vigorously popularized.

The utility model relates to the technical field of centerless grinders, and discloses a centerless grinder pneumatic clamping device which comprises a bottom plate, the upper surface of the bottom plate is fixedly connected with a water tank, the upper surface of the water tank is fixedly connected with a back plate, the outer wall of the back plate is fixedly connected with an L-shaped plate, the output end of a first motor is fixedly connected with a first rotating shaft, and the output end of the first motor is fixedly connected with a second rotating shaft. And the outer wall of the second rotating shaft is rotationally connected to the interior of the back plate, a belt is arranged on the outer wall of the second rotating shaft, a third rotating shaft is rotationally connected to the inner wall of the belt, a second grinding wheel is fixedly connected to the outer wall of the third rotating shaft, and a pneumatic assembly is arranged on the outer wall of the back plate. The motor is started to enable the first rotating shaft to drive the second rotating shaft to rotate, then the second rotating shaft drives the first grinding wheel to rotate, the third rotating shaft is driven by the belt to rotate, then the third rotating shaft drives the second grinding wheel to rotate, and at the moment, materials are placed on the upper surface of the supporting plate between the two grinding wheels; and therefore, the effect of placing the materials and better grinding the materials is achieved.

The utility model discloses a quartz tube outer wall polishing device which comprises a centerless grinding machine body, a first adjustable grinding wheel and a second adjustable grinding wheel are installed on the centerless grinding machine body, a clamping assembly is arranged between the first grinding wheel and the second grinding wheel, and the clamping assembly comprises an installation frame installed between the first grinding wheel and the second grinding wheel. The two ends of the mounting frame are each provided with two symmetrically-arranged vertical rods, the tops of the vertical rods are provided with supporting blocks, a bottom supporting plate is arranged between the two symmetrically-arranged supporting blocks, and the bottom supporting plate is connected to the mounting frame through a connecting rod; a filtering assembly is arranged on one side of the centerless grinding machine body and connected with a cutting liquid box of the centerless grinding machine body through a pump. The quartz tube is supported by the supporting block and the supporting plate to prevent the quartz tube from falling off, the quartz tube can be automatically ground and moved under the driving of the grinding wheel, and cutting liquid is filtered and reused by adopting a multi-filtering structure, so that the cost is greatly saved.

The utility model relates to the technical field of bearing ring production, and provides a bearing ring centerless grinding machine which comprises a base, the top of the base is fixedly connected with a containing groove, one end of the containing groove is fixedly connected with a first spring, a baffle is arranged, the baffle can limit the bearing ring at the position of the groove, and therefore the bearing ring can be fixed. The bearing ring is placed in the containing groove and is prevented from moving out of the containing groove, then an electric push rod is opened to push a push block forwards, the push block immediately applies thrust to the bearing ring placed in the containing groove to a containing plate, and due to the fact that one side of a baffle is an inclined face, when the bearing ring moves under thrust, the baffle is controlled through the inclined face of the baffle to extrude a second spring, and the bearing ring is prevented from moving out of the containing groove. The bearing rings are arranged in the containing grooves and hidden in the containing grooves, the bearing rings can conveniently move out of the containing grooves, and after one set of bearing rings is pushed out, the first springs push the remaining bearing rings forwards immediately, so that the next set of bearing rings abut against the containing grooves, and preparation is made for pushing.

The present invention belongs to the technical field of titanium alloy tubes. The present invention provides a titanium alloy fine-diameter thick-wall tube with a low yield ratio and a preparation method thereof. An ultra-low impurity content titanium alloy ingot is successively subjected to blooming and forging, and the obtained titanium alloy round bar is subjected to multi-pass hot extrusion processing, sizing cutting and center hole drilling to obtain a titanium alloy drawing tube blank; the titanium alloy drawing tube blank is subjected to multi-pass composite drawing to obtain a drawn tube; the drawn tube is successively subjected to solution treatment, water quenching and aging treatment to obtain a rough tube; the rough tube is successively subjected to straightening, inner hole cleaning and outer surface centerless grinding and polishing to obtain a titanium alloy fine-diameter thick-wall tube with a low yield ratio. The preparation method of the present invention uses an ultra-low impurity content titanium alloy, so that the overall yield strength of the titanium alloy fine-diameter thick-wall tube is lower, the plasticity is better, and it is easier to carry out extrusion and drawing processing; multi-pass extrusion and drawing processing are carried out to retain the longitudinal processing streamline of the tube to the greatest extent and further reduce the yield ratio.

A composite type pneumatic positioning material returning device suitable for a centerless grinding machine is characterized in that a front positioning component is installed at the front end of a tool apron of the centerless grinding machine and comprises a front positioning air cylinder, a front positioning horizontal adjusting plate and a front positioning vertical adjusting plate, and the front positioning horizontal adjusting plate is fixed to the front installation face of the tool apron of the centerless grinding machine through screws; the front positioning vertical adjusting plate is fixed on the front positioning horizontal adjusting plate mounting surface, and the front positioning cylinder is fixed on the front positioning vertical adjusting plate mounting surface; the rear positioning material returning component is installed at the rear end of the centerless grinding machine tool apron and comprises a material returning push rod, a material returning air cylinder and a positioning air cylinder, the material returning push rod is installed in two vertical adjusting plate installation holes through two oilless bearings, and a push rod fixing plate and the tail end of a piston rod of the positioning air cylinder are fixed through a screw and a nut. The tail end of the positioning cylinder barrel is fixed to the tail end of the material returning cylinder piston rod through a transition connecting plate. The pneumatic front positioning device and the positioning material returning device are used for achieving end face grinding and positioning material returning.

The utility model relates to the technical field of automobile part machining equipment, in particular to a centerless grinding machine for automobile part machining, which comprises a box body, a body and a filter component, the body is mounted above the box body, the filter component comprises a mounting rail, a sliding frame, a fixing plate, a fixing component, filter cotton and a limiting component, and the mounting rail is fixedly connected with the box body. The sliding frame is connected with the mounting rail in a sliding mode and located on the side, away from the box body, of the mounting rail, the fixing plate is fixedly connected with the sliding frame and located on the side, away from the mounting rail, of the sliding frame, the filter cotton is connected with the fixing plate through the fixing component, the fixing component fixes the filter cotton, and the limiting component is installed on the box body. And the limiting component limits the movement of the sliding frame, so that the filter cotton can be replaced more conveniently, and the working efficiency is improved.

The high-precision centerless grinding machine comprises a placing block, a grinding wheel and a guide wheel, the guide wheel is located on the front side of the placing block, the grinding wheel is located on the left side of the guide wheel, an arc-shaped groove is formed in the position, close to the center, of the left side of the placing block, and a fixing plate is fixedly connected to the position, close to the rear side, of the left side of the placing block; a material storage box is fixedly connected to the top of the fixing plate, and a discharging opening is formed in the position, close to the right side, of the bottom of the material storage box. When cylindrical aircraft parts with different diameters need to be machined, a supporting air cylinder can be started, two anti-falling plates can be driven to move when the supporting air cylinder is started, the distance between the anti-falling plates can be increased when the anti-falling plates move, and therefore the purpose of machining the cylindrical aircraft parts with different diameters is achieved.

The utility model relates to the technical field of cylindrical grinding devices, in particular to a centerless grinding cut-in tool rest which comprises a machine frame, and the machine frame is provided with a base and a supporting frame. The outer circle cutter is mounted at the upper end of the supporting frame through a mounting seat; the hinge seat is mounted on the side wall of the support frame and is arranged opposite to the mounting seat; the middle of the hinge assembly is connected with the hinge seat in a hinged mode, one end of the hinge assembly is connected with a synchronous rotating assembly, the synchronous rotating assembly is used for abutting against a workpiece, and the other end of the hinge assembly is provided with an abutting assembly and a reset assembly. The abutting assembly and the reset assembly are located on the two sides of the end of the hinge assembly respectively. The synchronous rotating device is tightly attached to the workpiece and rotates synchronously with the workpiece, and the concentricity of the workpiece is improved.

The utility model discloses a guide wheel driving and transmission mechanism of a centerless grinding machine. The guide wheel driving and transmission mechanism comprises an upper sliding plate, a servo driving motor, a worm and gear speed reducer, a chain transmission shaft, a driving chain wheel, a transmission chain, a driven chain wheel and a guide wheel main shaft, the upper sliding plate provides a guide wheel spindle seat to be mounted on a sliding plate mounting surface in the centerless grinding machine and is matched with a feed screw to adjust the feed distance of a guide wheel; the servo driving motor is connected with the worm and gear reducer, the worm and gear reducer is connected with the chain transmission shaft, the chain transmission shaft is installed in the bearing supporting seat through the front bearing set and the rear bearing set, the driving chain wheel is installed at the tail end of the chain transmission shaft and connected with the transmission chain, and the transmission chain is connected with the driven chain wheel. The driven chain wheel is installed on the guide wheel spindle to drive the guide wheel. The transmission device is stable in transmission and small in assembling and machining difficulty, and the purposes of stable transmission, cost reduction and efficiency improvement are achieved.

The utility model relates to the technical field of centerless grinding machines, and discloses a centerless grinding machine quick replacement die which comprises a grinding machine base and a die holder, first sliding grooves are formed in the two sides of the top end of the grinding machine base respectively, a set of electric control telescopic columns are embedded in the two first sliding grooves respectively, a first limiting frame is installed at the output end of each set of electric control telescopic columns, and a second limiting frame is installed at the output end of each set of electric control telescopic columns. And a group of first rollers are rotationally arranged on the inner sides of the two first limiting frames, and second limiting frames are mounted on one sides of the two first sliding grooves correspondingly. According to the utility model, when the die holder needs to be taken down, the electric control telescopic column extends out to enable the first limiting frame to move upwards, so that the positions of the first roller and the second roller are flush, and then the die holder is pulled outwards, so that the die holder can be taken out, and when the die holder is installed, the two sliding blocks at the bottom end of the die holder are inserted into the tops of the two second limiting frames at the same time; and then the mold base is pushed to the tail end of the first sliding groove, and finally the electric control telescopic column is contracted to the tail end.

The invention provides a lens processing method, and relates to the technical field of optical manufacturing. The lens processing method comprises the following steps: annealing a crystal bar grown from a single crystal; cutting the crystal bar along the radial direction of the crystal bar to obtain a plurality of coarse crystal sections; nesting is conducted on the coarse grain sections in the axial direction of the coarse grain sections to obtain a plurality of fine grain sections; grinding the fine crystal section by using a centerless grinding machine to obtain a blank crystal section; cutting the blank crystal section along the radial direction of the blank crystal section to obtain a plurality of blank wafers; and milling and grinding the blank wafer to obtain the lens. Wherein the annealing of the crystal bar can eliminate internal stress generated in the single crystal growth process; a centerless grinding machine instead of a cylindrical grinding machine in a traditional scheme is used for grinding the fine grain section, and mechanical stress borne by the two ends of the fine grain section when the cylindrical grinding machine conducts axis positioning on the fine grain section can be eliminated. That is to say, thermal stress and mechanical stress in the lens machining process can be effectively reduced, the lens is prevented from being broken in the machining process, the qualified rate of the lens is increased, and the quality and performance of the lens are guaranteed.

The unpowered bearing bracket for the centerless grinding machine comprises a base and a supporting plate, a plurality of driven bearings are arranged on the top of the supporting plate, the length and the height of the base and the supporting plate can be changed according to different machine types, the driven bearings are arranged on a main shaft, and the main shaft is fixed to the top of the supporting plate. A plurality of long circular holes are formed in the surface of the supporting plate, the supporting plate penetrates through the long circular holes through fastening screws and then is fixedly connected with the mounting vertical plate, a mounting bottom plate is arranged at the bottom of the mounting vertical plate, the mounting vertical plate and the mounting bottom plate are matched to form a base, and the mounting bottom plate is used for being fixed to a mounting position of the centerless grinding machine. The friction force of the workpiece is effectively reduced, self-adaptive rotation can be achieved, and the grinding quality is improved.

The invention relates to the technical field of centerless grinding machines, in particular to a centerless grinding machine grinding wheel high-steady-state finishing control method which can stably finish a high-precision grinding wheel in the dynamic process, a machine tool is provided with an MPM dynamic balancing instrument and adopts a marble lathe bed, and a three-phase asynchronous motor or a spindle motor is selected as a grinding wheel motor. A servo motor with the rated rotating speed of 3000r / min is selected as a diamond roller motor; in the process of dressing the grinding wheel by the diamond roller, the same-direction dressing mode that the linear velocity value VRlr when the spindle of the diamond roller rotates divided by the linear velocity value VGW when the spindle of the grinding wheel rotates is a fixed value qd is adopted; the dressing feeding of the grinding wheel dresser is controlled by a U shaft, and a fixed grinding wheel dressing amount is carried out each time of dressing.

The present invention provides a centerless grinding machine for bar grinding, belonging to the technical field of bar grinding. The centerless grinding machine for bar grinding includes a main frame body, on the top surface of which a first workbench and a second workbench are fixedly installed. Inside the first workbench and the second workbench, a second rotating shaft is rotatably installed, and grinding rollers are fixedly installed on the outer surfaces of the second rotating shafts. An automatic feeding component and a driving component are arranged on the top surfaces of the first workbench and the second workbench. In the present invention, when the second connecting rod moves in the extension frame along with the first toothed plate in the direction of the third connecting rod, it can drive the baffle plate to move synchronously inside the feeding frame, that is, the baffle plate moves inside the feeding frame in the direction of the third connecting rod, so that the bars placed in the material bin can fall into the feeding frame, and then can fall between the two grinding rollers through the feeding frame, thus achieving the purpose of automatically adding the bars between the two grinding rollers.

The invention relates to centerless grinding equipment and a technology thereof, and relates to the technical field of centerless grinding equipment.The centerless grinding equipment comprises a rack, a conveying belt, a material receiving disc, a grinding system, a carrier roller system, a supporting system and a transferring system.The conveying belt and the material receiving disc are installed on the two sides of the rack respectively, and the grinding system and the carrier roller system are oppositely installed at the two ends of the rack; a grinding position is formed between the grinding system and the carrier roller system, the supporting system is located at the grinding position, the transferring system moves among the conveying belt, the grinding position and the material receiving disc, the supporting system comprises a clamping device, a jacking vibration device and a rotation stopping sensing device, and the clamping device is installed on the rack and provided with a limiting end. The rotation stopping sensing device is installed on the clamping device, the jacking vibration device is installed on the rack and located at the limiting end, the jacking vibration device is electrically connected with the rotation stopping sensing device, the jacking vibration device is arranged on the lower side of the limiting end, the top of the jacking vibration device is inclined, and the quality of a middle pipe workpiece is guaranteed.