381 results about "Bar stock" patented technology

The invention relates to the technical field of forge piece forming, in particular to a deep-cavity thin-wall support forge piece, a forging die and a forming method.The deep-cavity thin-wall support forge piece is characterized in that a heated round bar is subjected to roll forging to obtain a preformed blank, and oxide skin of the blank obtained after roll forging is removed; putting the prefabricated blank into a pre-forging cavity of a forming die, and performing pre-forging forming; after pre-forging is finished, the pre-forged piece is transferred into a precision forging cavity of the same forming die to be subjected to precision forging forming, and a bilaterally symmetrical precision forging piece is obtained; putting the bilaterally symmetrical precision forgings into a slicing die frame for trimming, and cutting off flashes; cutting the bilaterally symmetrical precision forgings subjected to cold shaping from the shunting bin through a cutting device, and separating the bilaterally symmetrical precision forgings into two independent single forgings; forming defects are eliminated, and the forging yield is improved to the level of stable mass production; the thickness tolerance of the functional surface of the product is ensured, the spot welding current stability and the welding strength are ensured, the assembly requirement is met, and the dependence on subsequent machining is reduced; the material cost is reduced and the mold life is prolonged.

The utility model discloses a full-automatic extruding and cutting integrated device for petuntse bars. The full-automatic extruding and cutting integrated device comprises a mixing box, the two transmission rotating shafts are rotatably mounted in the mixing box, and two rotating blades are fixedly connected to the outer sides of the transmission rotating shafts and used for pushing and extruding the pug downwards; the extrusion pipe is arranged in the mixing box, an extrusion screw rod is installed in the extrusion pipe, and an extrusion die head is installed at the discharging end of the extrusion pipe; the pug cutting device has the advantages that after cutting is completed, the clamping part can accurately clamp pug, the moving part enables the clamped pug to be stacked towards the cart on one side, manual operation is reduced, and production efficiency and safety are improved; the clamping plates are obliquely arranged, the two single-shaft air cylinders drive the clamping plates on the two sides to move towards the middle, pug can be clamped and fixed from the two sides, it is guaranteed that the pug cannot fall off in the carrying process, and the carrying accuracy is guaranteed.

This utility model discloses a bar stock support frame, specifically relating to the field of support frame technology. It includes a support frame with a slanted groove seat fixedly connected to its upper surface. A connecting block is fixedly connected to the lower inclined surface of the slanted groove seat. An adjustment and positioning component is provided on the lower surface of the connecting block. The adjustment and positioning component includes: a support frame fixedly connected to the lower surface of the connecting block; a screw rotatably mounted on the inner wall of the support frame; and two threaded connecting blocks connected to the outer wall of the screw; and a linkage bar fixedly connected to the upper inclined surface of the connecting blocks. The two threads on the outer wall of the screw are opposite and symmetrically arranged. This utility model uses an adjustment and positioning component. The screw drives the two connecting blocks, and under the action of the threaded meshing force, the distance between the two connecting blocks increases, and the distance between the two limiting bars increases. The bar stock can be tilted and adjusted according to its actual position, resulting in better support for the adjusted bar stock.

The application discloses a blade precision forging forming method and a blade, and comprises the following steps: S1: designing a final forging forming die according to M blade type section coordinate parameters provided by a blade part design drawing; S2: designing a pre-forging forming die according to parameters of a cavity of the final forging forming die; S3: designing an extrusion blanking die according to parameters of cavities of the final forging forming die and the pre-forging forming die; and S4: adopting the designed die, sequentially performing extrusion blanking of a bar, pre-forging forming and final forging forming to obtain a final forging piece. According to parameters of the blade part design drawing, the shape and size of the final forging piece, the pre-forging piece and the extrusion blank are accurately designed, and corresponding dies are designed to perform forming processing, so that the bar is gradually deformed according to needs in the forming process, metal materials are gradually distributed according to needs, burrs are not generated between forming steps, the blade die life and the blade size stability can be improved, and the utilization rate of metal raw materials can reach more than 80%.

The utility model relates to the technical field of nickel alloy processing, in particular to a nickel alloy heat treatment furnace convenient to adjust temperature control, which comprises a bottom plate and a furnace body fixedly connected to the upper end of the bottom plate, a rotating shaft is rotatably connected to the rear part of the interior of the furnace body through a bearing, and supporting rods and starting motors are fixedly connected between a plurality of connecting plates and the rotating shaft. The motor drives the second gear to rotate, the second gear drives the first gear to rotate, the first gear drives the rotating rod and the rotating shaft to rotate, the rotating shaft drives the multiple charging barrels to rotate with the rotating shaft as the center, accordingly, the nickel alloy bars in the multiple charging barrels roll, and the multiple through holes are formed in the outer walls of the multiple charging barrels, so that heat circulates; the nickel alloy bar rolling in the charging barrel is matched, heating is more uniform, the heating efficiency is effectively improved, the overall heat treatment efficiency is improved, the PI D controller is responsible for adjusting the heating current in furnace body temperature control, accurate control over the heating process is achieved, and temperature control is convenient.

The utility model relates to the technical field of rust removal devices, and discloses a surface rust removal device for round steel bars, which solves the problem of incomplete rust removal of the rust removal device and comprises a support table, bar support mechanisms are arranged at two ends of the top of the support table, and a movable rust removal mechanism is arranged at the top end of the support table. The movable rust removal mechanism is connected with the supporting table through a movable driving assembly, the bar supporting mechanism is composed of two U-shaped supporting seats, a first carrier roller, a second carrier roller and a rotary driving assembly, and the first carrier roller and the second carrier roller are rotationally connected between the two U-shaped supporting seats; the rotary driving assembly is connected between one U-shaped supporting base and the first carrier roller and between one U-shaped supporting base and the second carrier roller. The movable rust removal mechanism is composed of a movable frame, a supporting plate, a supporting arm, a driving motor, a first belt wheel, a movable arm, a hinge shaft, a second belt wheel and a rust removal abrasive belt. Through the rust removal device, the rust removal convenience and comprehensiveness can be improved.

The application provides a large height-diameter ratio titanium-aluminum alloy blank manufacturing device and method. The method comprises the following steps: S10, designing a blank: designing a forging according to a target titanium-aluminum alloy blade; the forging comprises a blade root part, a blade body part and a blade crown part; presetting the shape and size of the blank according to the forging; S20, obtaining a forming die and a raw material: preparing the forming die according to the preset shape and size of the blank in step S10, and selecting a bar; S30, adopting the forming die to perform upsetting forming on the bar to obtain the blank; and performing hot working on the blank to obtain a target titanium-aluminum alloy blade forging. The large height-diameter ratio titanium-aluminum alloy blank manufacturing method and device can solve the problems of blank instability of a large height-diameter ratio metal bar and high mold cost caused by titanium-aluminum alloy isothermal forming, realize non-isothermal forming of a large height-diameter ratio titanium-aluminum alloy special-shaped part, improve material utilization, reduce waste of titanium-aluminum alloy material, and effectively reduce the machining cost of the blade.

The present application relates to a kind of automatic material dumping and box withdrawing method suitable for AGV car, which adopts the material dumping and box withdrawing structure including material box dumping mechanism, empty box conveying belt being arranged below material box dumping mechanism, material box transfer mechanism capable of transferring material box between material box dumping mechanism and empty box conveying belt, and comprising the following steps: S1, dumping material;S2, exit empty box.The present application realizes AGV car automatic turnover material box to dump bar material on one hand, turnover is stable, ensures that bar material is all fallen on feeding platform, reduces labor intensity and manpower cost;On the other hand, it realizes automatic empty box withdrawal, to facilitate AGV car to carry out next feeding action in time, effectively improves production efficiency;At the same time, opening direction is unchanged when empty box is withdrawn, to facilitate next material preparation.

This invention discloses a short-process bar rolling method and system. The method includes the following steps: S1, heating the billet in a heating furnace; S2, descaling with high-pressure water; S3, completing eight rolling passes in rolling zone one; S4, performing multiple-length segmentation with a first flying shear; S5, performing four rolling passes in rolling zone two; S6, performing multiple-length segmentation with a second flying shear; S7, performing diameter reduction rolling on the bar using a KOCKS mill; S8, a third flying shear; S9, water cooling; S10, cooling; S11, shearing the bar to length; S12, finishing and annealing; S13, magnetic flux leakage testing. This invention can meet the requirements for bar shape and size as well as the requirements for flaw detection, achieving integrated bar heating, controlled rolling and cooling, and flaw detection while saving space. This invention can reduce the number of traditional bar rolling passes, realizing short-process bar production with small space requirements, low power consumption, customization, greenness, and low carbon emissions.

The invention relates to the technical field of bolt machining, in particular to cutting equipment for bolt production and machining, which comprises a support mounting cylinder, and further comprises an adaptive feeding mechanism, a cutting mechanism, a cutting mechanism, a cutting mechanism, a cutting mechanism, a cutting mechanism and a cutting mechanism, the adaptive feeding mechanism comprises a feeding mounting cylinder arranged at one end of the support mounting cylinder, and two groups of adjusting guide modules are symmetrically arranged in the feeding mounting cylinder; a material guide mounting cylinder is arranged at the other end of the supporting mounting cylinder; and the adjusting cutting mechanism comprises a rotating adjusting module, a distance adjusting module and a rotating clamping module, the rotating adjusting module comprises a rotating mounting barrel arranged on one side of the end of the material guiding mounting barrel, and the rotating clamping module comprises a displacement mounting disc right opposite to the rotating mounting barrel. According to the device, processing of bar materials with size difference at the two ends is taken as a core breakthrough point, the self-adaptive feeding, multi-mode clamping and fine adjusting technologies are combined, a machining platform which is flexible in height, stable and reliable is constructed, and the device has remarkable technical progress in the aspects of improving the machining range and improving the production efficiency.

This invention relates to the field of cutting machine technology and discloses an automatic cutting machine tool suitable for multi-specification bars. It includes a feeding mechanism, a planar trimming mechanism, a step trimming mechanism, a conveyor rack, a loading trolley, and an unloading trolley. The planar trimming mechanism and the step trimming mechanism are respectively located at both ends of the feeding mechanism. Both mechanisms include cutting cutter heads, which are used to cut the neutral plane and step of the bar spindle, respectively. The conveyor rack is located at the front end of the feeding mechanism, and a conveying structure is installed above it. The loading trolley is located at the front end of the conveyor rack, and the unloading trolley is located at the rear end of the feeding mechanism. This invention, through its symmetrical planar trimming and step trimming mechanisms, significantly outperforms the eccentricity error of traditional lathes, meets the requirements for multiple specifications, maintains structural stability even during high-speed cutting, extends tool life by 50%, reduces the surface roughness to Ra1.6μm, adapts to bars of different lengths, and achieves a closed-loop loading and unloading system.

The application provides a precision integrated machining system and method for machining tangential hole type centrifugal micro nozzle, which comprises the following steps: firstly, rough turning the end face and the outer circle of the bar stock clamped by the spindle tool system, then machining the tangential micro hole by the tangential micro hole drilling system, machining the coaxial flow channel hole, the part end face and the outer circle clamping face by the spindle tool system, repeating the machining and feed, removing the burrs at the inlet and outlet of the tangential micro hole, then driving the secondary spindle chuck to clamp the outer circle clamping face, rotating the spindle and the secondary spindle synchronously, machining the remaining outer circle by the spindle tool system until the part is cut off from the bar stock, clamping the cut-off part by the secondary spindle chuck, machining the cut-off end by the secondary spindle tool and removing the machining burrs. The application has small error and high production efficiency compared with the traditional machining method.

A method and system for preparing forged structural parts from TC6 material are disclosed. First, TC6 bar stock is sawn, and the β-phase transformation temperature (Tβ) of the sawn TC6 bar billet is measured. Then, the billet is heated to a high temperature (Tβ-40) ±10℃ in an electric furnace and held to obtain a pre-treated TC6 bar billet. Next, the pre-treated TC6 bar billet undergoes a series of processes in sequence: small-end aggregation, flat forging, bending, flat forging, large-end aggregation, flat forging, large-end forming, flat forging, and intermediate billet treatment to obtain a secondary-treated TC6 bar billet. This secondary-treated TC6 bar billet is then heated to a high temperature (Tβ-40) ±10℃ in an electric furnace and held to obtain a billet to be forged. Finally, it is forged using an electric screw press, followed by heat treatment, isothermal annealing, and physicochemical testing to obtain the machined TC6 material structural part. Finally, the parts are inspected, and qualified parts are stored in the warehouse. This process yields qualified structural parts.

The application provides a bar efficient polishing device, belonging to the technical field of metal processing. It comprises a rack, a polishing mechanism arranged on the rack and a feeding mechanism arranged on the rack. The polishing mechanism comprises a plurality of polishing assemblies and a speed reducer one. The polishing assembly comprises an installation body one, a polishing cylinder rotatably connected to one end of the installation body one and a driving gear one rotatably connected to the installation body one. The outer wall surface of the polishing cylinder is provided with a driven gear one. The polishing cylinders are coaxially arranged. The output shaft of the speed reducer one is connected to each driving gear one. The feeding mechanism comprises a plurality of parallel feeding assemblies and a speed reducer two. The feeding assembly comprises an installation body two, a feeding cylinder rotatably connected to one end of the installation body two and a driving gear two rotatably connected to the installation body two. The outer wall surface of the feeding cylinder is provided with a driven gear two. The output shaft of the speed reducer two is connected to each driving gear two. A sliding block is slidingly connected to the rack. The application has the advantages of high polishing efficiency.

The invention belongs to the technical field of bar production, and particularly relates to a steel bar for an engine crankshaft and a production method thereof, and the steel bar comprises the following chemical components in percentage by mass: 0.25%-0.30% of C, 0.20%-0.30% of Si, 1.00%-1.10% of Mn, less than or equal to 0.015% of P, less than or equal to 0.008% of S, 1.20%-1.30% of Cr, less than or equal to 0.25% of Ni, 0.05%-0.09% of Ti, 0.15%-0.20% of Mo, 0.06%-0.10% of V, less than or equal to 0.10% of Cu and the balance of Fe and inevitable impurities. The method has the advantages that the steel bar for the engine crankshaft is produced by adopting the ecological electric furnace + LF + RH + continuous casting smelting process and the rolling process, and the strict requirements of the steel bar for the high-end engine crankshaft in the aspects of obdurability, fatigue life and surface quality are met.

The utility model discloses a bar positioning die and relates to the field of bar machining, the bar positioning die comprises a supporting frame and a bar, a table top is arranged on the supporting frame, a transverse positioning mechanism and a longitudinal positioning mechanism are installed on the table top, and the bar penetrates through the inner side of the transverse positioning mechanism and the inner side of the longitudinal positioning mechanism. The transverse positioning mechanism can limit the two sides of the bar, and the longitudinal positioning mechanism can limit the upper portion and the lower portion of the bar. An adjusting plate located on the upper portion is moved downwards, so that the inner wall of a groove in the adjusting plate on the upper portion is attached to the upper portion of a bar, a second friction pad makes contact with the bar, the friction force of the contact part is increased, the lower portion of the bar is located on the adjusting plate on the lower portion, and then a pushing nut is rotated to move downwards step by step; the upper adjusting plate and the lower adjusting plate are attached to the surface of the upper adjusting plate, the upper adjusting plate is limited, and the bars are limited through the upper adjusting plate and the lower adjusting plate, so that the bars can be prevented from moving longitudinally during machining.

The utility model provides feeding equipment. The feeding equipment comprises a moving platform, a conveying belt device, a pushing device, a machining device and a plurality of guide plates. The multiple guide plates are sequentially arranged at intervals from top to bottom and are all arranged on the rack, and bars are placed between the guide plates; the conveying belt device is arranged on the rack in the vertical direction, a plurality of fixing blocks used for placing bars are arranged on the conveying belt device, and the guide plate is obliquely arranged in the direction of the conveying belt device; the pushing device is connected with the rack, and the pushing device is arranged below the conveying belt device; the machining device is arranged below the output end of the pushing device, and the pushing device is used for pushing the bars into the machining device. The bar positioning device solves the problems that traditional equipment is insufficient in bar positioning precision and limited in conveying efficiency.

A hidden type online material taking turning plate is provided with a material arranging sliding plate, a stacking plane is arranged on the upper portion of the material arranging sliding plate, bar materials enter the stacking plane of the material arranging sliding plate one by one and are arranged in a row in order on the stacking plane, and the material taking turning plate is further arranged on the material arranging sliding plate. The material taking turning plate is hinged to the material discharging sliding plate through a hinge shaft so that the material taking turning plate can rotate relative to the material discharging sliding plate, and a material taking groove is further formed in the material taking turning plate. And the bar material can fall into the material taking groove under the action of gravity through the rotation action of the material taking turning plate relative to the material discharging sliding plate, so that the bar material is separated from the material discharging sliding plate and enters a sampling procedure. According to the technical scheme, the discharging sliding plate is arranged on the product stacking preorder station, the material taking turning plate capable of turning over is arranged on the discharging sliding plate, and online sampling is completed through the turning-over action of the material taking turning plate.

The invention relates to the technical field of turning, in particular to a floating clamp. Existing part blanks such as bearing rings are generally formed by forging on a forging bed after bar blanking, and the parts of the type have large outer circle roundness errors. In automatic equipment, the outer diameter needs to be roughly ground through a grinding machine, and cost is high. A main shaft is provided with a flange plate, backer seats and clamp seats are arranged on the inner side and the outer side of the flange plate, a pull rod is arranged in the main shaft, conical sleeves are arranged in the clamp seats, spring clamps are arranged in the conical sleeves, floating clamping blocks and the spring clamps are arranged in a free floating mode, and the floating amount is controlled by a control piece. A backer is arranged on the backer seat, and a workpiece abuts against the backer and is clamped and loosened by the floating clamping block; whether the position of the workpiece is correct or not is detected by the detection mechanism. According to the floating clamp, when the outer diameter roundness of a machined product is not round, the outer diameter can be clamped to machine the inner diameter. The blank is directly processed on equipment, so that the cost is reduced. Feeding can be achieved under the condition that a machine tool spindle rotates, and efficiency is improved.

This invention discloses a forming method for a car door hinge forging, comprising: preheating and cleaning the surface of the forging bar stock, followed by high-temperature calcination; bending the calcined bar stock into a billet using step-by-step bending, and then subjecting the billet to high-pressure descaling to remove the oxide film on the surface of the billet material; performing initial forging and final forging on the obtained billet to obtain the shaped forging; wherein, during the initial and final forging processes, compressed air is used to blow away the oxide scale inside the forging die cavity, and a lubricant is sprayed onto the surface of the forging die groove; punching and trimming are performed on the shaped forging, followed by normalizing; and shot blasting is performed on the normalized shaped forging to obtain the final shaped product. The car door hinge prepared by the forming method provided by this invention not only improves its mechanical properties but also reduces machining costs, improves product assembly accuracy, and enables the hinge to meet the strength and position requirements of assembly.

The invention relates to a spring bar tail end positioning and conveying mechanism, and belongs to the technical field of spiral spring forming production, the spring bar tail end positioning and conveying mechanism specifically comprises two fixed supports installed on a fixed cross beam and a track beam installed on the two fixed supports, a transverse moving mechanism is installed on the track beam in a sliding mode, and an installation frame is installed on the transverse moving mechanism; two rotating shafts are mounted on the mounting frame, the two rotating shafts are connected through a gear, a rotating control motor is mounted on one rotating shaft, a tail end clamping assembly is mounted on the other rotating shaft, and an angle adjusting mechanism is further mounted between the mounting frame and the tail end clamping assembly; the conveying device is simple in structure, reasonable in design and capable of improving the conveying efficiency and guaranteeing the product quality.

The invention belongs to the field of forging hot working, and particularly relates to a forging method of a large-size GH3625 alloy annular forge piece. Comprising the steps that firstly, a high-temperature alloy bar is put into an electric furnace for heating and heat preservation; the press-down speed is required to be 10-15 mm / s and the deformation is required to be 45%-65% in the cake upsetting and punching process; 2, the rough mold is coated with a heat preservation coating; thirdly, the blank is heated and subjected to heat preservation, the blank is expanded to the preset size after heat preservation, a forge piece is obtained, and the final reaming deformation is not larger than 15%-25%; and fifthly, the forge piece is subjected to solution heat treatment, the heat preservation time is 60 min, and air cooling is conducted.

The application discloses a feeding device of a roll forging machine, and has the characteristics that the feeding device comprises a feeding seat, a feeding module installed on the feeding seat, a moving beam installed on the feeding module and driven by the feeding module to move back and forth along a feeding direction, a clamping assembly fixed on the moving beam, the clamping assembly comprising a driving member and a pair of clamping fingers, the clamping fingers being driven by the driving member to open or close, a clamping groove being formed between the pair of clamping fingers to accommodate a tail end of a bar, and the clamping fingers being closed to narrow the width of the clamping groove to clamp the tail end of the bar, a swing bracket swingably arranged on the feeding seat, the swing bracket being provided with a blank positioning groove for placing and positioning the bar, the swing bracket having a supporting station and a separation station, and a bracket driver having a movable end connected with the swing bracket and used for driving the swing bracket to swing to separate the blank positioning groove from the bar. The feeding device can avoid the surface of the bar from being damaged and improve the product quality.

The invention provides a continuous bar conveying device. The continuous bar conveying device comprises a left conveying mechanism and a right conveying mechanism which are symmetrically arranged left and right. The two mechanisms respectively comprise a front vertical plate, a rear vertical plate, an upper conveying wheel, a lower conveying wheel, a conveying belt and a driving mechanism, and arc-shaped clamping parts are arranged on the outer surface of the conveying belt to jointly form a channel for clamping and conveying bars. During use, bars are arranged at the inlet of the device. After the left and right driving mechanisms are started, the bars enter the conveying channel by means of self weight or thrust. And when the front end of the bar is in contact with the arc-shaped clamping part moving in the same direction, the bar is captured and clamped. The left driving and the right driving cooperate to drive the conveying belt to operate at the same stable linear speed, and continuous conveying of bars is achieved. The left conveying mechanism and the right conveying mechanism which are symmetrically arranged and the arc-shaped clamping conveying belts which are oppositely arranged form a conveying channel, the conveying channel is seamlessly connected with follow-up machining equipment, relay type feeding of bars is achieved, shutdown caused by material changing is avoided, and therefore the product quality can be guaranteed, and the production efficiency is remarkably improved.

The invention relates to the technical field of numerical control sawing machine equipment. The automatic feeding and discharging numerical control sawing machine comprises an elastic clamping mechanism, a rack, an automatic feeding and discharging unit, a sawing unit and a central control system. The elastic clamping mechanism is a core component, comprises a fixing assembly, a lifting assembly and a grabbing and clamping assembly, and can automatically adjust the pressing force according to the diameter of the iron rod. The fixing assembly drives gear transmission through a motor, the stability is enhanced in cooperation with an iron attraction block, and accurate power is provided for the lifting assembly. The lifting assembly drives the grabbing and clamping assembly to accurately align, and the movable disc ensures that the clamping force is uniform. And the grabbing and clamping assembly adopts a linkage structure of three groups of moving rods and rotating shafts, so that flexible clamping is realized, and the bar material is prevented from being damaged. The automatic feeding and discharging unit completes full-automatic transfer of iron rods, the saw cutting unit achieves accurate saw cutting, and the central control system overall plans all the units to work cooperatively, receives detection signals and instructs the clamping mechanism to adjust pressure.

The invention discloses a commercial vehicle connecting rod small flash forging process, and relates to the field of automobile part manufacturing. The round bar material is subjected to deformation and extension in the axial direction through five-pass rolling of a roll forging die, so that the cross section shapes of the round bar material corresponding to a rod body of the connecting rod, the connecting position of the rod body and the large head and the connecting position of the rod body and the small head are sequentially changed from ellipse to circle to ellipse to circle to circle, and a forging stock is obtained; the forging stock is flattened through a flattening die to obtain a flattened piece, the height of the flattened piece is 2-5 mm larger than that of the pre-forged piece, the width of the flattened piece is 1-2 mm smaller than that of the pre-forged piece, the sectional area of each position of the flattened piece is larger than that of the pre-forged piece, and the fillet of each position of the flattened piece is one level larger than that of the pre-forged piece; and a pre-forging and finish-forging process: performing pre-forging and finish-forging treatment on the flattened part to obtain a pre-forged part and a finish-forged part in sequence. The problems of low material utilization rate and short service life of the die are solved by reducing the flash volume and the material consumption.

The present application relates to a kind of production methods of double-layer alloy composite seamless pipe.The outer layer material of double-layer alloy composite seamless pipe is low-carbon steel, the inner layer material is nickel-based alloy, outer layer alloy bar material is continuous casting billet or rolling blank, and inner layer alloy bar material is forging blank.The production steps are: (1) blank preparation; (2) upsetting; (3) blank machining; (4) hot expansion; (5) hot extrusion; (6) heat treatment; (7) surface treatment; (8) cold rolling; (9) finishing treatment.The blank preparation process includes: (1) theoretical calculation; (2) blanking; (3) electroplating; (4) blank assembly; (5) head and tail pad welding.The double-layer alloy composite seamless pipe produced by the present application has firm combination of the inner and outer layers of alloy, reduces the defects of extrusion delamination, the outer layer alloy has high strength, the inner layer alloy has good corrosion resistance, improves the yield rate of processing defects, and reduces material cost.

A discharging, lifting and transferring device of an automatic bar sawing machine comprises a roller track A and a rotating bracket which are arranged on a track rack A. A servo motor B, a roller chain B and a roller B are arranged on the rotating bracket. The roller track C is arranged on the track rack C, and a servo motor C, a roller chain C and a roller C are arranged on the roller track C; a material blocking cylinder is fixed to the side wall of the foundation frame, and the end of a piston rod of the material blocking cylinder is fixedly connected with a piston rod baffle. A push plate cylinder is fixed to the side wall of the roller track C, the end of a piston rod of the push plate cylinder is fixedly connected with a push plate, and a waste slide carriage is arranged between the roller track C and the waste frame; the bottom end of the rotating bracket is fixedly connected to the upper end of the swing cylinder rotating body. Automatic operation is achieved through PLC control, manual intervention is not needed, and the production efficiency and the product quality are greatly improved.

The invention provides a continuous feeding device and method for square bars. The device comprises two roller driving units which are symmetrically arranged on the two sides of a square bar feeding path. Each roller driving unit comprises a box body, a worm rotatably arranged in the box body, at least two worm gears meshed with the worm, rollers coaxially and fixedly connected with the worm gears, and a driving mechanism; the rollers are configured in a manner that the working surfaces of the rollers can accommodate and press the side surfaces of the square bar, and a feeding cavity for clamping the square bar is formed between the corresponding rollers of the two roller driving units; the driving mechanism is connected to the worm and used for driving the worm to rotate. According to the square bar feeding device, a structure that a plurality of worm wheels on the same side are driven by a single worm at the same time is adopted for feeding square bars, stable conveying of the square bars can be achieved, and the problems that the square bars are prone to deflection or torsion in the feeding process, and the feeding precision and stability are difficult to guarantee are solved.

The invention relates to a method for manufacturing a barrel (1) for use in a timepiece, the barrel being arranged to pivot about a pivot axis (D) and comprising a flange portion (3) comprising a bearing surface (30) for bearing an inner ring of a spring, from which bearing surface a hook portion (2) projects to engage in an aperture in the inner ring, and the flange portion comprises an end face (20) serving as a bearing of the eyelet when winding the spring, the flange portion further comprising a groove (4) located upstream of the hook portion in the winding direction (S) of the spring for holding an end of the spring, the method comprising the following steps:-taking a bar; -turning the profile of the bar to form at least one cylindrical portion (13) comprising a vertical surface and a horizontal surface; -machining said cylindrical portion using a broaching tool by a plurality of reciprocating translational movements in the direction of the pivot axis of the strip shaft, to form a flange portion comprising a hook portion, a bearing surface and a groove.