252 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 invention provides a high-strength pure titanium rod wire and a preparation method thereof, and relates to the technical field of biomedical metal materials, and the preparation method comprises the following steps: preparing materials according to industrial pure titanium components, carrying out vacuum consumable smelting to obtain a titanium ingot blank, and carrying out cogging forging and continuous rolling on the titanium ingot blank to obtain a coiled rod blank; the coiled bar blank is subjected to hot drawing to obtain a pure titanium bar, and the pure titanium bar subjected to hot drawing is sequentially subjected to scaling treatment, heat treatment, cold drawing, sliding block straightening, stress relief annealing and centerless grinding to obtain a finished product of the high-strength pure titanium bar wire. According to the method, the surface reduction rate is controlled through cold drawing, the performance of the rod wire is adjusted through a reasonable heat treatment system, metastable structures in the alloy are obviously deformed and close to each other through cold drawing, the deformation amount of cold drawing is continuously increased, grain boundaries and dendritic grain boundaries are close to each other, the interface distance is gradually reduced, grains and the metastable structures are refined, and the yield of the rod wire is increased. Due to the increase of dislocation density and grain refinement, the yield strength and tensile strength of the cold-drawn pure titanium rod wire are 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 invention belongs to the technical field of centerless grinding machines, and particularly relates to a high-efficiency numerical control centerless grinding machine and a using method thereof.The high-efficiency numerical control centerless grinding machine comprises a grinding machine body, a grinding assembly and an adjusting assembly, a supporting dust removal assembly is installed between the grinding assembly and the adjusting assembly, and limiting assemblies are installed at the tops of the grinding assembly and the adjusting assembly. The supporting side discs and the supporting bottom disc on the two sides of the top of the supporting box support the bottom of a grinding workpiece, when the grinding wheel grinds the grinding workpiece, the stability of the grinding workpiece is high, and even on the premise that the radial sizes of the grinding workpiece are different, the grinding workpiece can still be supported by adjusting the adjusting roller assembly; and the moving space of the polished workpiece on the supporting dust removal assembly is reduced.

The utility model belongs to the technical field of grinding machines, and particularly refers to a center hole-free pressure wheel device; it comprises a first guide wheel seat and a second guide wheel seat which are arranged side by side, a first spindle is rotatably arranged in the first guide wheel seat, and a second spindle is rotatably arranged in the second guide wheel seat, one end of the first spindle and the second spindle are driven to rotate synchronously by a first driving mechanism, and the other end is respectively provided with a first guide wheel and a second guide wheel, a placement position for a workpiece is formed between the first guide wheel and the second guide wheel, a workpiece adjustment frame is arranged on the first guide wheel seat and the second guide wheel seat, a limiting rod which abuts against one end of the workpiece is arranged on the workpiece adjustment frame, a second driving mechanism is arranged on one side of the first guide wheel seat or the second guide wheel seat, the second driving mechanism is connected to the pressure wheel seat, and a pressure wheel which can be pressed onto the workpiece is arranged on the pressure wheel seat; the utility model can be used in conjunction with an ordinary external cylindrical grinder to process a workpiece without a center hole, and can greatly reduce the processing cost compared with the need to use centerless grinding in the prior art.

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 invention relates to an ultra-long air valve alloy and a grinding method and device thereof, and belongs to the technical field of air valve alloy manufacturing. The method comprises the steps that a feeding table and a discharging table are placed on the left side and the right side of the centerless grinding machine correspondingly, and supporting devices used for fixing the air valve alloy are arranged on the sides, away from the centerless grinding machine, of the feeding table and the discharging table correspondingly; the air valve alloy sequentially passes through a feeding table, a centerless grinding machine and a discharging table and is fixed through the supporting device; grinding the air valve alloy by using a centerless grinding machine, wherein the grinding process comprises a rough grinding procedure and a fine grinding procedure which are sequentially carried out; the rough grinding procedure comprises a first rough grinding procedure and a second rough grinding procedure which are sequentially carried out; the grinding amount of each time of grinding is controlled to be the same, it is guaranteed that fluctuation generated by air valve alloy in the grinding process is relatively small, and roundness and straightness are guaranteed. And finally, accurate grinding treatment is conducted, and it is guaranteed that the surface quality and roughness of the air valve alloy meet the requirements.

The utility model discloses a self-cleaning centerless grinding machine, which belongs to the technical field of centerless grinding machines and comprises a box body, a flow guide seat is fixed in the middle of the top end of the box body, a plurality of groups of through holes are formed in the upper end of the flow guide seat in an array manner, a bearing seat is fixed in the middle of the flow guide seat, a filter drum is arranged below the flow guide seat, and a limiting ring is mounted on the outer side wall of the filter drum. By designing a group of centrifugal spin-drying cleaning mechanism consisting of the filter cartridge, the gear ring, the gear and the servo motor, the servo motor drives the gear ring to rotate through the gear and further drives the filter cartridge to rotate in the process of filtering cooling liquid and sweeps, so that the sweeps in the filter cartridge can be subjected to centrifugal force, and the residual cooling liquid on the surface of the sweeps can be thrown out; on one hand, the separation effect is guaranteed, on the other hand, subsequent manual cleaning of cooling liquid on the surfaces of the scraps is not needed, manpower and material resources are saved, and the using effect of the device is effectively improved.

The utility model relates to the technical field of centerless grinding machines, and discloses an automatic centerless grinding machine which comprises a grinding machine body, a surrounding plate is fixedly installed at the top of the grinding machine body, a liquid outlet box is fixedly installed at the left end of the grinding machine body, a water pump is fixedly installed at the left end of the liquid outlet box, and a machining mechanism is arranged outside the grinding machine body. A discharging mechanism is arranged on the front face of the grinding machine body, through arrangement of a first hydraulic rod, the position of an adjusting wheel can be conveniently adjusted, under cooperation of a grinding wheel and a workpiece support, a workpiece can be conveniently ground, when the grinding wheel rotates, a knocking block is made to knock a flexible screen, and therefore the grinding wheel is driven to rotate; according to the metal scrap collecting device, metal scraps are prevented from being clamped in a flexible screen, under cooperation of a collecting box, the metal scraps can be conveniently collected, through arrangement of a positioning base, a threaded block and a baffle, an L-shaped base can be conveniently positioned and limited, and under cooperation of universal wheels, the conveying device can be conveniently moved.

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 feeding device for the centerless grinding machine comprises two chain wheel assemblies which are symmetrically arranged front and back, each chain wheel assembly comprises a driving chain wheel, a driven chain wheel and a chain which is in transmission connection with the driving chain wheel and the driven chain wheel, and each chain comprises a plurality of chain links. A follow-up supporting piece is arranged on one chain link of every two adjacent chain links, the supporting pieces on the two chains are arranged in a one-to-one correspondence mode, and positioning grooves with upward groove openings are formed in the supporting pieces. The two axial baffles are symmetrically arranged front and back, and the supporting piece is arranged between the two axial baffles; and a soft rubber sheath for covering the positioning groove is wrapped on the supporting sheet. The feeding device has the characteristics of convenience in feeding and reference positioning, and is complete in overall function and high in practicability.

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 invention discloses a processing technology for high-precision cemented carbide rods, and relates to the technical field of cemented carbide processing. A centerless grinder is used to grind the original cemented carbide rod at least three times, which are the first grinding, the second grinding, and the third grinding. The centerless grinder includes a guide wheel and a grinding wheel that rotate synchronously in different phases. Grinding fluid is used for cooling during grinding, and the grinding fluid after grinding enters a filtering system for filtration and recycling. The invention uses a centerless grinder to grind the rod in multiple passes, gradually releasing the processing stress in the rod. At the same time, different grinding processes are used to control the grinding amount of the rod, and the grinding fluid filtering system is combined to reduce the defects of annular thread lines on the surface of the rod caused by sand particles or cuttings after grinding, thereby obtaining a high-precision cemented carbide rod.

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 utility model discloses a centerless grinding machine cut-in grinding fast adjusting support which comprises a fixing support, an installation block and an adjusting supporting assembly, the installation block is installed on the fixing support, the adjusting supporting assembly is installed on the installation block, and the adjusting supporting assembly comprises at least one set of adjusting supports. The adjusting supports are symmetrically arranged on the mounting block and can rotate relative to the mounting block. During adjustment, the adjusting support is rotated, then the position and the angle of the workpiece are adjusted, adjustment is more convenient and faster, the adjusting time is saved, meanwhile, the adjusting support has a stable bearing function, and the technical problems that in the prior art, the adjusting efficiency is low, and the grinding stability is poor are effectively solved.