100results about How to "Stable processing" patented technology

The application discloses a laser engraving processing device and method based on a five-axis engraving machine, relates to the field of laser engraving equipment control, and loads a three-dimensional CAD model and a process task of a workpiece to be processed, distributes the process task to machining paths of each laser processing assembly, respectively predicts time-space collision of paths of five laser processing assemblies, adjusts speed or paths of low-priority laser processing assemblies through a priority avoidance algorithm when collision risk is predicted, and generates a collision-free pre-planned path. Through reasonable path planning and a collision avoidance mechanism, the application effectively avoids collision risk between multiple laser processing assemblies and guarantees stability of a machining process. Through establishment of a thermal influence monitoring grid and a thermal dose accumulation model, laser machining parameters are adjusted in real time, workpiece deformation caused by thermal dose superposition is avoided, and machining quality is improved. A focal point dynamic following mechanism ensures that the focal point is always in an optimal machining position, and further improves engraving precision.

The application relates to the field of gear machining, in particular to a high-precision gear machining device and process, which comprises a workbench, a clamping fixture, a calibration assembly, a machining assembly and a transmission assembly, the clamping fixture is connected to the end face of the workbench, the transmission assembly is connected to the end face of the workbench, the machining assembly and the calibration assembly are both connected to the driving end of the transmission assembly, the calibration assembly comprises a calibration bench and a calibration table, the calibration bench is connected to the driving end of the transmission assembly, the calibration table is connected to the end face of the calibration bench, and a controller is connected between the calibration table and the transmission assembly; when the flatness of the gear end face measured by the calibration table is less than a preset value, the controller drives the transmission assembly to drive the machining assembly to approach the clamping fixture. In the application, the calibration table and the controller are arranged, separation of defective products and qualified products is realized, a worker does not need to hold a detection device to detect the flatness of the gear end face, the machining steps of gear machining are reduced, the work burden of the worker is reduced, and the machining cost of the gear is reduced.

The utility model discloses a full-automatic die-cutting machine for processing high-grade gift boxes, which comprises a workbench, an automatic feeding component is arranged at the top end of the workbench, a first rotating roller is rotatably connected in the top end of the workbench, a second rotating roller is rotatably connected in the top end of the workbench, first belt pulleys are symmetrically and fixedly mounted on the periphery of the first rotating roller, and second belt pulleys are symmetrically and fixedly mounted on the periphery of the second rotating roller. A narrow conveying belt is arranged in the middle of the first belt wheel and the middle of the second belt wheel, a rotating motor is fixedly installed at one end of the workbench, and an output end shaft of the rotating motor penetrates through the workbench and is fixedly installed on the first rotating roller. Fixing is completed by automatically bouncing the reset spring into the embedding rod, additional tools are not needed, the installation efficiency is improved, the scraping plate makes contact with the narrow conveying belt, scraps adsorbed by static electricity can be scraped off in time, the surface of the conveying belt is kept clean, the service life of equipment is prolonged, and it is guaranteed that high-grade gift boxes are machined efficiently and stably; the production benefit and the product quality are improved.

The present application relates to helical slot processing technical field, disclose a kind of helical slot bevel cutting mechanism and processing method, including linear module and two processing tool bits, the linear module and two processing tool bits are all installed on machine tool, the moving seat of the linear module is fixedly connected with support plate, the outside of the support plate is fixedly connected with two mounting brackets, the outside of the mounting bracket is provided with rotating mechanism and chip removal mechanism, the rotating mechanism includes motor, the motor is installed on the outside of mounting bracket, the output of the motor is fixedly connected with mounting sleeve, the inside of the mounting sleeve is slidably connected with sliding rod. By two processing tool bits simultaneously to the both sides of part helical slot processing, cooperate with the rotation of part and the position of overall structure to move, realize the accurate control of cutting path, compared with the traditional single tool rotation angle cutting, can effectively improve processing efficiency, and ensure helical slot cutting seam precision is more stable, improve processing quality.

The laser type milk box edge cutting and grinding machine comprises a rack, the rack comprises a workbench, a dividing plate capable of rotating is installed on the workbench, and a plurality of jigs used for containing milk boxes and distributed in an annular array are arranged on the surface of the dividing plate; a calibration assembly and an edge cutting assembly with a laser cutting head are arranged on the portion, on one side of the index plate, of the workbench, and the direction from the calibration assembly to one side of the edge cutting assembly is the autorotation direction of the index plate. The jig comprises a positioning unit for positioning the milk box and a calibration limiting unit capable of finely adjusting the position of the milk box, and the positioning unit and the calibration limiting unit are clamped on the two sides of the milk box. A positioning plate is arranged at the bottom between the positioning unit and the calibration limiting unit and fixed to the surface of the index plate. The flash is in a to-be-machined posture through clamping and fine adjustment, the flash is accurately cut off through laser after being positioned through the calibration assembly, the trimming precision and efficiency are improved, and the appearance quality and the yield are remarkably improved.

The utility model belongs to the technical field of power tool turrets, and particularly relates to a numerical control machine tool slant bed power tool turret turning and milling composite machine tool which comprises a numerical control turning and milling composite machine tool body, a power tool turret is arranged on the inner wall of the numerical control turning and milling composite machine tool body, and a motor installation groove is formed in the inner wall of the power tool turret. Servo motors are installed on the inner wall of the power tool turret, one servo motor is installed on the inner wall of the motor installation groove, a thermal shrinkage tool handle is installed at the output end of the servo motor, and a tool bit is movably connected to the inner wall of the thermal shrinkage tool handle. By arranging the thermal shrinkage cutter handle and utilizing the principle of thermal expansion and cold contraction, the cutter head is installed during heating and tightly held after cooling, vibration transmission can be reduced, the machining precision can be improved, errors can be automatically compensated, the coaxiality is ensured, the service life of the cutter head is prolonged, the surface quality is improved, the clamping force is higher, the cutter head can be effectively prevented from loosening, and the machining yield of fragile materials is improved.

The application discloses an active unloading type liquid static pressure spindle and relates to the technical field of liquid static pressure spindles.The active unloading type liquid static pressure spindle comprises a spindle, a tray is fixedly arranged at the upper end of the spindle, a conical roller bearing is fixedly arranged at the lower part of the spindle, a radial bearing is fixedly arranged between the tray and the conical roller bearing on the spindle, an inner shell is sleeved outside the radial bearing and the conical roller bearing, a ring-shaped groove is oppositely formed in the middle of the upper and lower end faces of the inner shell, and an upper cover plate and a lower cover plate are respectively fixedly installed in the ring-shaped groove.The radial bearing limits the spindle in the radial direction, the conical roller bearing limits the spindle in the radial direction and the axial direction, the spindle is prevented from being displaced in the axial direction and the radial direction during operation, the transmission efficiency of the spindle and the stability of operation are improved, the machining precision of the machined objects on the tray is prevented from being affected, the appearance of defective products caused by precision is reduced, and the machining quality is improved.

The utility model relates to mechanical processing auxiliary equipment field especially, and is split type bearing shell drilling positioning frock, including split type bearing shell drilling positioning frock, including base, clamping component, and clamping mechanism includes T type clamp plate, and T type clamp plate includes connecting plate and clamp plate, and the clamp plate is located split type bearing shell mounting hole, and the bottom fixed position column of connecting plate tail end, and the base is fixed with hollow tube, and the inner chamber diameter of hollow tube is greater than the outer diameter of position column, and the hollow tube position column rotation connects, and the vertical installation adjusting screw rod on base, and the central hole is set up in connecting plate, and adjusting screw rod passes through the hole and penetrates T type clamp plate, and the adjusting screw rod is screwed adjusting nut, and adjusting nut is located T type clamp plate top. Through the matching of arc locating groove and split type bearing shell connecting lug outer arc surface, avoid the vibration when punching and cause bearing shell to shake, improve drilling processing accuracy. Compression spring can play the role of saving strength when replacing bearing shell, and the labor intensity of operating personnel is reduced.

The utility model discloses a metal material cutting device which is suitable for semicircular pipe fitting type workpieces and comprises a machine frame. The middle guide rail, the left side guide rail and the right side guide rail are installed on the rack, fan-shaped supporting plates are installed at the two ends of the middle guide rail through sliding blocks, and opposite axial sawing motors are installed on the left side guide rail and the right side guide rail through sliding blocks; the rotating motors are installed at the two ends of the middle guide rail through sliding blocks and used for driving the radial sawing motor to rotate; the rotating shaft rod is mounted on the rack and located on the upper sides of the left guide rail and the right guide rail, and the end of the rotating shaft rod is connected with a gear motor through a reduction gearbox; and the pressing rods are locked on the rotating shaft rod in a sleeving manner and are used for fixing the pressing gaskets through bolts. A semicircular pipe workpiece is supported through the fan-shaped supporting plate, the upper end of the semicircular pipe workpiece is pressed and locked through the gear motor driving the pressing rod, then the side face of the semicircular pipe workpiece is sawn through the axial sawing motor and the radial sawing motor, cutting and trimming of the workpiece are completed, machining is stable, and efficiency is high.

This utility model discloses an integrated chamfering and edge grinding machine, relating to the field of machining technology. It includes a conveyor frame, an edge grinding frame, a clamping assembly, a lifting mechanism, and an edge grinding assembly. In use, the conveyor motor, chamfering drive motor, clamping motor, lifting mechanism, and edge grinding motor are activated separately via a controller. First, the output shaft of the clamping motor drives the clamping drive shaft to rotate. A clamping gear, mounted on the clamping drive shaft, rotates along with it. The clamping gear meshes with the serrated teeth of a misaligned clamping rod, causing the misaligned clamping rod to move under the drive of the clamping gear, thus opening and closing the clamping jaws. When the clamping jaws are closed, they firmly clamp the part to be processed, providing stable support for the chamfering operation. After the part is clamped by the clamping jaws, the chamfering drive motor starts, and its output shaft is connected to the clamping assembly to perform the chamfering operation on the part.

To address the issues of insufficient performance and high cost associated with integral casting and additive manufacturing methods for parts with small-entry elliptical gradient deep cavities, and the difficulties, low efficiency, and high cost of metal removal methods, this invention proposes a machining method for elliptical gradient deep cavities with small entry points. The method involves first rough drilling and rough turning to obtain a deep hole. Then, a step-by-step machining approach is adopted, dividing the part into regions and machining them axially and radially. First, the part is tilted to machine the regions on both sides of the major axis of the ellipse. Then, the part is turned upright to machine the regions on both sides of the minor axis of the ellipse. During the upright machining, a radial layering and thin-cutting fast-running method is used. Several layers are machined using the first toolpath until the machining residue in the undercut and triangular regions is removed. Then, a second toolpath is used for contour machining to obtain a gradient deep cavity with an elliptical cross-section. Finally, the gradient deep cavity is precision milled until its internal dimensions and surface roughness meet the design requirements.

The application discloses a double-side open type grain anti-adhesion multi-stage grinding equipment and a grinding method, and belongs to the technical field of grain grinding, and comprises a stand part; a feeding part and a discharging part are respectively arranged at the top and the bottom of the stand part; an outer grinding part is arranged in butt joint between the feeding part and the discharging part, the outer grinding part can realize multi-stage fine grinding and can be opened downward from left and right sides; a rotatable inner grinding part is arranged in the outer grinding part, the inner grinding part can always keep a running state and can prevent grain adhesion to the inner wall in a synchronous vibration mode during running. The outer grinding part of the grinding equipment can be opened downward from left and right sides, and is more convenient to maintain regularly; when grain is discharged, the grain falls onto the rotating inner grinding part, and the grain uniformly slides into a grinding gap under the action of centrifugal force; the inner grinding part prevents grain adhesion to the inner wall in a synchronous vibration mode during running, so that the whole processing process is more smooth.

This invention discloses a machine for machining slotted round nuts, comprising a frame and a worktable. The worktable is equipped with a feeding unit, a clamping unit, a moving unit, and a machining unit. The feeding unit includes a drive assembly and a material box inclinedly mounted on one side of the drive assembly. A turntable is located at the center of the material box, and a waiting plate is located on one side of the material box. One end of the waiting plate is connected to the turntable via a guide plate. The waiting plate includes a horizontal plate and two vertical plates. One end of the horizontal plate has a through hole, and a material drop pipe is located below the through hole. The clamping unit is located below the material drop pipe. The moving unit drives the clamping unit to transport the material to the machining unit. The machining unit is mounted on the worktable via a bracket and includes a lifting assembly and a spindle fixed to the lifting assembly for mounting cutting tools. In this invention, the various units cooperate closely, resulting in more continuous workpiece machining, reducing manual intervention, and improving the continuous operation capability of the equipment.

The utility model discloses a clamping device for packing box processing, and relates to the technical field of clamping devices, the clamping device for packing box processing comprises a collecting box, the surface of the collecting box is fixedly connected with a filter screen, the surface of the collecting box is fixedly connected with a portal frame, and the surface of the portal frame is fixedly provided with a motor; a guide groove is formed in the surface of the portal frame, an output shaft of the motor is fixedly connected with a two-way threaded rod, the two-way threaded rod is rotationally connected with the inner wall of the guide groove, the surface of the two-way threaded rod is in threaded connection with a guide block, the guide block is slidably connected with the inner wall of the guide groove, and the surface of the guide block is fixedly connected with a guide block. The surface of the fixing plate is fixedly connected with a clamping plate, cleaning cotton slides downwards to clean the surface of the packaging box, then when the packaging box is used subsequently, the surface of the packaging box is cleaner and tidier, and then foreign matter and dust are prevented from being attached to the surface of the packaging box.

The utility model provides a battery fixing clamp, which relates to the technical field of battery processing, and comprises a turnover mechanism, a driving mechanism is arranged at the bottom of the turnover mechanism, a clamping mechanism is arranged on one side of the turnover mechanism, the clamping mechanism comprises a mounting plate, one side of the mounting plate is fixedly connected with a sliding groove plate, and the sliding groove plate is fixedly connected with the turnover mechanism. A fixing pipe is arranged on the side, away from the fixing pipe, of the sliding groove plate, a connecting plate is arranged on one side of the fixing pipe, and a connecting pipe is fixedly connected to the bottom of the fixing pipe. According to the utility model, the overturning of the clamped battery can be realized through the designed fixed clamping mechanism capable of overturning, and the bottom of the battery can be processed without taking down the battery again and positioning and clamping the battery again, so that the process of processing the battery by a worker is more convenient, the processing time is shortened, and the working efficiency is improved through the designed gear capable of manually adjusting the overturning. And the inclination angle of the clamping mechanism can be adjusted, so that workers can process the battery at different angles more conveniently.

The utility model discloses a bending tool, which relates to the technical field of steel structure processing and manufacturing, and adopts the technical scheme that the bending tool comprises a base, a positioning groove for a plate to penetrate is formed in the base, two sides of the base are fixedly connected with baffles, two sides of the base are rotatably connected with driving arms, and the driving arms are fixedly connected with the positioning groove. The driving arm is located on the side, away from the base, of the baffle, a first limiting groove and a second limiting groove which are formed in a penetrating mode are formed in the baffle and the driving arm respectively, a rolling roller abutting against the surface of the base is arranged on the base, and a rotating shaft of the rolling roller is located in the first limiting groove and the second limiting groove at the same time. Through the arrangement of the structure, the rolling roller can be driven by rotating the driving arm, so that rolling bending of a plate in the positioning groove is achieved, and in the process, the rolling roller abuts against the surface of the base all the time, so that the bending quality of the plate is guaranteed.

This invention relates to the field of gear machining technology, specifically to a novel CNC high-speed gear milling machine. Its features include a gear milling machine base, a fully enclosed outer shell mounted on top of the base, and a gear milling cutter holder, gear milling cutters, a cutter holder mounting base, a cutter base, and a workpiece fixing table mounted on the base within the fully enclosed outer shell. The workpiece fixing table is rotatably connected to the top of the base via a workpiece rotation C-axis, which is controlled by a servo motor within the base. The lower end of the cutter holder has a mounting slot for mounting the gear milling cutters, and the cutter holder is connected to the right end face of the lower end of the cutter holder mounting base via a cutter holder adjustment mechanism. This invention, through the design of the cutter holder adjustment mechanism, enables precise adjustment of the gear milling cutter, allowing for smooth machining of helical gears while ensuring machining accuracy.

The application provides a method and a die for realizing heading forming of a fastener head structure, and comprises the following steps: adopting the die to perform one-time heading on the fastener head structure to obtain a rough heading head type; and adopting the die to perform two-time heading on the rough heading head type to obtain a fine heading head type.The application has the beneficial effects that: the product size consistency is good; the new forming method is adopted, the product head type is replaced by heading instead of turning, the influences of unstable clamping, tool wear and unstable personnel operation during turning are avoided, the product processing process is stable, and the size consistency is good; the material utilization rate is high; the product head type is replaced by heading instead of turning, the head type size is directly formed by heading, the original turning head type condition is avoided, and the material utilization rate is improved from less than 80% to 100%.

The utility model relates to electromagnetic valve processing equipment technical field, and disclose a kind of overturning tool based on electromagnetic valve threading hole processing, including perforating machine and the base connected on perforating machine, by the mutual cooperation of workbench, handle, T-shaped plate and rectangular slide hole, the batch adding function of the electromagnetic valve to be processed is realized, by rotating handle, electromagnetic valve can be sequentially rotated to the perforating machine below and is perforated, improve work efficiency, so that processing process is more smooth, the structure is simple, convenient to operate, and practicality is strong;By the mutual cooperation of first gear, first rack, worm, worm wheel, second gear and L-shaped plate, the clamping and perforation of electromagnetic valve are realized, first rack drives L-shaped plate to clamp electromagnetic valve, worm worm wheel self-locking ensures clamping stability, while second rack drives L-shaped plate to open and take piece, and operation process is simple and efficient: piece, clamping, perforation, take piece, replace electromagnetic valve conveniently and quickly.

This application relates to the field of switch box manufacturing, and in particular to a switch box assembly device, which includes a platform, a feeding assembly, a flipping assembly, and a positioning assembly. The feeding assembly is fixedly connected to the platform, and has a loading port and a unloading port at both ends. The feeding assembly is used to transport workpieces from the loading port to the unloading port. The flipping assembly is fixedly connected to the feeding assembly and is located near the loading port. The flipping assembly is used to flip the workpiece. The positioning assembly is fixedly connected to the feeding assembly and is located on the side of the flipping assembly away from the loading port. The positioning assembly is used to position the workpiece. The workpiece is fed from the loading port, the flipping assembly flips the workpiece so that the receiving groove of the workpiece faces upward, the feeding assembly transports the workpiece, and the positioning assembly positions the workpiece, facilitating the installation of various components in the receiving groove and improving production efficiency.

The utility model relates to food processing technical field, concretely discloses a kind of chicken feet bone removal device, including bone removal box, rotary motor is equipped in bone removal box, rotary motor's output shaft is fixedly equipped with carousel, the circumferential of carousel is uniformly arranged with multiple fixtures, positioning slot is opened in fixture, bone removal box is sequentially arranged with chicken feet opening mechanism, chicken feet bone removal mechanism and bone removal chicken feet clamping mechanism along the circumferential of carousel;Wherein, chicken feet opening mechanism includes three groups of main toe opening components and a group of big toe opening components, chicken feet bone removal mechanism includes big toe stripping component, three main toe stripping components and leg bone stripping component, along the circumferential of carousel is uniformly and continuously arranged, and is correspondingly equipped with pressing mechanism above fixture;Bone removal chicken feet clamping mechanism is correspondingly arranged above fixture.The utility model improves production efficiency, realizes the continuous, assembly line type automatic processing of chicken feet bone removal, reduces equipment injury risk.

The utility model discloses a positioning clamp for machining, and belongs to the technical field of machining. A placement block is welded to the top face of the bottom plate, limiting assemblies are installed on the two opposite sides of the top face of the bottom plate, each limiting assembly comprises a first electric push rod, a limiting rod is installed at the top end of each first electric push rod, and a fixing screw is connected to each limiting rod in a penetrating and threaded mode. A positioning assembly is installed in the middle of the top face of the bottom plate and comprises an outer frame. The two opposite sides of the outer wall of the outer frame are each provided with two adjusting grooves, one side of the top face of the outer frame is fixedly connected with a connecting plate, a second electric push rod is installed on one side of the connecting plate, a limiting block is installed at the bottom end of the second electric push rod, and adjusting screws are connected to the adjusting grooves in a penetrating and threaded mode. Through cooperation of the limiting assembly and the positioning assembly, the first electric push rod drives the limiting rod to vertically move so as to adapt to workpieces with different heights, the design that the fixing screw rod is combined with the notch facilitates position calibration and locking in the vertical direction, and the positioning precision is guaranteed.

This invention discloses a worm gear and forming wheel composite gear grinding machine for processing large gears, including a bed and a workpiece clamping mechanism and a composite machining mechanism arranged opposite to each other on the bed. The composite machining mechanism includes a column, a column slide plate, and a rotary table. The column is slidably mounted on the bed, and the column slide plate is slidably connected to the column. One side of the rotary table is rotatably connected to the column slide plate, and the other side of the rotary table is connected to a grinding feed assembly and a dressing feed assembly. The grinding feed assembly includes a grinding slide plate that slides along a first direction, a grinding spindle mounted on the grinding slide plate, and a grinding wheel. The dressing feed assembly includes a dressing slide plate that slides along a second direction and a dressing assembly. The grinding feed assembly and the dressing feed assembly are used for workpiece processing and grinding wheel dressing, respectively. This invention integrates grinding and dressing on the same rotary table, shortens the transmission chain, and realizes rapid switching between processing and online grinding wheel dressing.

The utility model belongs to the field of printed cloth desizing, and particularly relates to a digital printed cloth desizing machine which comprises a working box, a PLC (programmable logic controller) control device is fixedly connected to the outer side of the working box, four anti-abrasion rollers are rotatably connected into the working box, the four anti-abrasion rollers are divided into two groups, and an unwinding device is fixedly connected to the outer side of the working box. A first motor drives a first transmission rod to rotate so as to drive a transmission frame to rotate, so that a connecting rod is driven to move, a mounting roller is driven to move, a sliding cylinder is driven to move, a striking block is in contact with fabric, the striking block retracts, a sliding rod moves, and a spring is driven to retract; and meanwhile, the connecting rod and the mounting rod which continuously move can drive a solution to shake, so that the fabric and the solution are continuously impacted, the solution can more thoroughly clean away slurry on the fabric, and smooth proceeding of subsequent processing is guaranteed.

The invention discloses a large-current flat plug terminal forming device and process, relates to the technical field of flat plug terminal processing, and aims to solve the problem that the automation degree of existing large-current flat plug terminal production is low. The large-current flat plug terminal forming device comprises an operation table, the bottom of the operation table is fixedly connected with a support, the exterior of the operation table is fixedly connected with a top cover, and a rotating disc is arranged above the operation table; and an integrated processing module is arranged outside the rotating disc, and a plurality of copper sheets which are circumferentially distributed at equal intervals are arranged outside the rotating disc. According to the large-current flat plug terminal forming equipment and process disclosed by the invention, when the device is used for processing a copper sheet, operations such as secondary punching processing, linear cutting, primary punching and bending in the processing steps of the copper sheet are integrated, so that the copper sheet can be processed on the same equipment; the turnover degree of the copper sheets on different devices is reduced, the automation degree of the devices is remarkably improved, the copper sheets are machined more smoothly, and the overall machining efficiency of the copper sheets is improved.

This invention relates to a biodegradable anti-stick film and its preparation method. The biodegradable anti-stick film comprises a top layer, a middle layer, and a bottom layer arranged sequentially. The top layer comprises polyadipate, polylactic acid, polybutylene butyrate, a compatibilizer, a chain extender, and a dual-antibiotic masterbatch. The middle layer comprises polyadipate, polyglycolic acid, polybutylene butyrate, a compatibilizer, a chain extender, and a dual-antibiotic masterbatch. The bottom layer comprises polyadipate, polylactic acid, polybutylene butyrate, a compatibilizer, a chain extender, and a dual-antibiotic masterbatch. Its advantages lie in the following: adding a compatibilizer to each layer improves the compatibility of the raw materials, thereby reducing the brittleness of the biodegradable anti-stick film; adding PBAT-carrier dual-antibiotic masterbatch to each layer controls the degradation rate of the biodegradable anti-stick film; adjusting the blending ratio of each layer component improves the mechanical properties, processing flowability, and biodegradability of the biodegradable anti-stick film; and coating the top layer with a UV-curable release coating ensures the application requirements of the biodegradable anti-stick film.

This utility model discloses a production and processing equipment for diamond mesh security screens, belonging to the field of screen processing technology. It includes a workbench with mounting grooves on both sides of its upper surface. Each mounting groove is rotatably connected to a threaded screw via bearings. Each threaded screw has a mounting seat threaded onto its surface. A clamping plate is fixedly connected to the upper end of each mounting seat. Each clamping plate has sliding grooves at both ends, and sliding rods are movably connected inside the sliding grooves. This utility model, by setting up clamping plates, ensures the window frame's stable position and precise positioning during processing, improving the equipment's versatility and practicality. By setting up positioning components, the device can flexibly meet the positioning needs of different corners of the security screen, achieving effective positioning of each corner of the security screen, ensuring the security screen remains stable during processing, and improving the overall quality and aesthetics of the product.

This invention discloses a gas turbine cylinder block machining positioning device, belonging to the field of machining clamping technology. The gas turbine cylinder block includes an outer cylinder, an inner cylinder, a star-shaped support, and a support ring. Multiple height-adjustable support mechanisms include support seats and movable supports. The movable supports are provided with normal positioning parts and tangential positioning parts. The top protection mechanism includes a guide plate, a first variable diameter plate, multiple sector plates, and multiple second positioning parts that can move synchronously radially. The guide plate is provided with multiple first straight grooves and second straight grooves. The first variable diameter plate is provided with multiple first arc-shaped grooves and connected to a second drive assembly. The multiple sector plates are stacked, and the sector plates are provided with first pins that cooperate with the first straight grooves and first arc-shaped grooves and second pins that cooperate with the second straight grooves. This invention uses height-adjustable support mechanisms to position the outer cylinder, resist shear force and axial force, and ensure support rigidity. It also cooperates with the top protection mechanism to make the axes of the support ring, outer cylinder, and inner cylinder collinear.

The application discloses a start-up activation method of a hydrocracking catalyst, and the method comprises the process that the hydrocracking catalyst is reduced after being subjected to a sulfidation treatment, the hydrocracking catalyst comprises a carrier containing Y molecular sieve, metal molybdenum, organic nickel and an organic metal additive, the metal additive is at least one or more of zinc, copper, magnesium and gallium, the mass content of the organic nickel is 0.1% to 4.0% in terms of the nickel element in the final hydrocracking catalyst, preferably 0.2% to 3.0%, and further preferably 0.5% to 2.0%; and the mass content of the organic metal additive is 0.05% to 2.5% in terms of the metal additive element, preferably 0.1% to 2.0%, and further preferably 0.2% to 1.5%. The start-up activation method of the hydrocracking catalyst can significantly improve the activity stability when processing sulfur-free raw materials, low-sulfur raw materials and other types of raw materials, meanwhile, the hydrocracking catalyst has excellent aromatic hydrocarbon saturation performance, and can meet the hydrocracking process of the above-mentioned types of raw materials.

The application provides a crankshaft double-end face turning and milling machine tool, and relates to the technical field of numerical control machine tools. The machine tool comprises a machine tool main body, a main machine clamping piece, an auxiliary clamping piece, a transverse movement linear module, a longitudinal movement linear module, a lifting assembly, a functional piece, a cutting piece, a passive piece and a cleaning assembly. The machine tool main body is provided with a controller. The main machine clamping piece is arranged on one side of the machine tool main body and is used for providing clamping force and self-rotation force for the crankshaft. The auxiliary clamping piece is arranged on the other side of the machine tool main body and is used for assisting the self-rotation of the crankshaft. The transverse movement linear module is arranged on the upper portion of the machine tool main body and is used for providing transverse movement function. The functional piece can provide turning and milling functions with adjustable inclination angles, so that the milling operation of the inclined hole of the crankshaft can be met, and the crankshaft double-end face can be turned and milled.