56results about How to "Cut off stability" patented technology

The invention discloses an intelligent numerically-controlled hydraulic sheet shearing machine, and belongs to the technical field of sheet shearing machines. The machine comprises a base, spring telescopic columns, a conveying mechanism, a fixing frame, a pressing mechanism, a workbench and an extruding mechanism; the base is transversely arranged on a bottom surface; the multiple spring telescopic columns are vertically fixed to the top of the base; the pressing mechanism comprises pressing rods symmetrically arranged on the two sides of a sheet shearing cutter; the workbench is fixed to themiddle of the base, the interior of the workbench is of a hollow structure, the top of the workbench is provided with a sheet shearing opening part, and the rear inner wall of the workbench is provided with a transverse sliding groove; and the extruding mechanism comprises a sliding block arranged in the sliding groove. According to the machine, the inventive concept is ingenious and the practicability is high; when a mounting base moves downwards, the sheet shearing cutter can be driven to move downwards so as to shear a steel sheet, the folded edge of the cut steel sheet can be extruded tobe flat, and burrs at the cut position can be polished; and the application range is wide, and the machine is suitable for application and popularization.

The present invention relates to a method for cutting a thin strip of an alloy that contains initial ultrafine crystals and has a structure in which ultrafine crystal grains having an average grain diameter of 30 nm or smaller have been dispersed in an amorphous matrix phase in an amount of 5-30 vol.%. The method comprises placing the thin strip on a flexible bed that can be sharply deformed by local pressing, bringing the blade of a cutter into horizontal contact with the surface of the thin strip, pressing the cutter against the thin strip, so that a pressure is evenly applied to the thin strip, and thereby bending the thin strip along the blade edge of the cutter to brittlely cut the thin strip.

A sewing machine with a cutter, which supports the cutter shaft of the movable cutter, and supports the cutter stand on which the fixed cutter is installed on the base base in a foldable and movable manner in the direction of the shaft length through a support cylinder protruding from one side. On the support frame, on the rear side of the cutting table and the support frame, cooperate with the screw shaft screwed in the screw hole of the sewing machine base, and engage the operation dial set on the screw shaft with the surrounding support tube The engaging groove of the cutting board constitutes an adjustment device, and the shaft screw is screwed in by operating the dial, which can easily and accurately adjust the position of the cutting table in the left and right directions, and can flexibly correspond to the change of the cutting position of the sewn fabric .

A steel material which has been rid of surface scale and which contains Si: 0.08 to 0.20%, Al: more than 0.03% to 0.08%, and one or more of P, Ti and V and satisfies the relationships: ¢Al / Si=0.45! and ¢262(Al / Si)+197(P / Si)+225(Ti / Si) +50(V / Si)>123! wherein each symbol of element represents the content of the element. The steel material permits high-speed stable thermal cutting and is usable as the material for laser beam cutting, plasma arc cutting, and gas cutting. The steel material may have an inorganic zinc primer coat on the surface.

The invention discloses a cutting-off device for an armored cable, and relates to the technical field of cable cutting-off equipment. The cutting-off device comprises a rack, wherein the rack is provided with a bearing table, and the upper end face of the bearing table is used for storing the cable; and the rack is further provided with a sliding base, the sliding base is located above the bearing table and connected to the rack in a sliding mode in the vertical direction, the sliding base is provided with a cutting-off assembly, and the sliding base moves downwards to enable the cutting-off assembly to cut off the cable on the bearing table. By arranging the bearing table and the cutting-off assembly, the cable can be cut off more conveniently and quickly.

The present invention provides an electroformed thin edge grinding wheel for use in cutting an electronic material part such as a QFN (quad flat non-leaded package), an optical transmission module (IrDA) or an LED work, not only restraining the generation of burr, but also having high linearity to achieve high-accuracy cutting, further superior in wear resistance and peeling resistance to attain a long life of a grinding wheel and stably maintain a high grade to the cut electronic material part. This electroformed thin edge grinding wheel includes a thin edge abrasive layer 1 formed by dispersing abrasive grains 3 in a metal plated phase 2, wherein the thin edge abrasive grain layer 1 has first to fifth abrasive grain layers 1A to 1E sequentially stacked in the direction of a layer thickness. Among these, the content of abrasive grains 3 in the first, third and fifth abrasive grain layers 1A, 1C, 1E is set larger than that of abrasive grains 3 in the second and fourth abrasive grain layers 1B, 1D.

The invention discloses preparation equipment and a preparation method for novel composite fibers for a high-altitude operation. The preparation equipment comprises a winding device, wherein the winding device comprises a material cutting assembly, a winding roller, a first material storage mechanism and a second material storage mechanism; the winding roller is located below the material cutting assembly, so that the composite fibers can be vertically conveyed downwards, and the conveying speed of the composite fibers is equal to the winding speed of the winding roller; the first material storage mechanism is arranged above the material cutting assembly, the first material storage mechanism is used for storing materials when the material cutting assembly cuts off the composite fibers and discharging the materials when the material cutting assembly resets after cutting off, and the material storage speed and the material discharging speed are both equal to the conveying speed of the composite fibers; and the second storage mechanism is arranged between the material cutting assembly and the winding roller, the second storage mechanism is used for discharging materials when the material cutting assembly cuts off the composite fibers and storing the materials when the material cutting assembly resets after cutting off, and the material discharging speed and the material storage speed are both equal to the winding speed of the winding roller.

The invention relates to a device for achieving continuous supply of films automatically. The device is simple in structure, high in working efficiency and capable of achieving automation film connection. The device comprises a machine frame, more than two unreeling rollers arranged on the machine frame in a rotary mode, a fusing device arranged in front of the unreeling rollers and used for cutting off the packaging films, a hot melting jointing device arranged in front of the fusing device and used for connecting two packaging films, and an electrical control system, wherein the fusing device comprises a support arranged on the machine frame, a fusing base arranged on the support, and a fusing driving device arranged on the support, two press-fit bases are arranged on the support and located above and below the fusing base respectively, the two press-fit bases can get away from or approach the fusing base under the driving of the fusing driving device, fusing wires communicated with an external power supply are arranged on the upper side and the lower side of the fusing base respectively, and the unreeling rollers, the hot melting jointing device, the fusing wires and the fusing driving device are all connected with the electrical control system.

The invention provides a synchronous bearing and an electric shaft driving system of a vehicle. The synchronous bearing (B) comprises an inner ring (B1), an outer ring (B2), rolling bodies (B3) and aretainer (B4), the outer circumferential surface of the inner ring (B1) is sunken towards the radial inner side to define a plurality of grooves (G), the rolling bodies (B3) are accommodated in the grooves (G), the grooves (G) are provided with deep parts (G1) and shallow parts (G2, G3) with different radial depths, the retainer (B4) can abut against the inner ring (B1) to move in the axial direction and the circumferential direction at the same time, the rolling bodies (B3) move between the deep portion (G1) and the shallow portions (G2, G3), and therefore the rolling bodies (B3) can roll freely or be locked by the inner ring (B1) and the outer ring (B2). According to the synchronous bearing, the structure is simple, operation is convenient, and the torque transmission or cut-off processof an input shaft and an output shaft can be stably conducted.

The invention discloses an annularly-arranged double-frustum friction type automatic stepless speed change device and belongs to the technical field of mechanical transmission. The annularly-arranged double-frustum friction type automatic stepless speed change device comprises a box, an input shaft and an output shaft. The axis of the input shaft is parallel to the axis of the output shaft. A friction disc of a frustum-shaped structure is arranged at one end of the input shaft, and the friction disc slides along the input shaft under the action of a hydraulic propeller. A big bevel gear is arranged at one end of the output shaft. The friction disc and the big bevel gear are located in the box. Driven shafts are further arranged on the side wall of the box. The axes of the driven shafts are perpendicular to the input shaft. Small bevel gears are fixed to the driven shafts. The driven shafts are sleeved with frustums. The frustums slide along the driven shafts under the action of springs. The friction disc is in sliding fit with the surfaces of the frustums. The big bevel gear is engaged with the small bevel gears. According to the annularly-arranged double-frustum friction type automatic stepless speed change device, by continuously changing the radius of the contacting section of the friction disc and the annularly-arranged friction frustums, stable stepless speed change within a wide speed change range is achieved, transmission is stable, large torque can be transmitted, and the annularly-arranged double-frustum friction type automatic stepless speed change device is suitable for high-power engines.

Disclosed is a connector assembly which enables electrically safe disconnection and disconnection because it is possible to ensure a time interval between a disconnection time point of an interlock terminal and a disconnection time point of a power supply terminal when a connector is disconnected. To disconnect and separate the female connector and the male connector, the connector assembly may include an intermediate locking mechanism that restricts a lever for disconnecting the connectors in a state in which the interlock terminals of the two connectors are separated from each other and the power terminals of the two connectors are in contact with each other, in this way, a two-step disconnection can be achieved in which the power supply is switched off after the lever is limited in the intermediate locked state and then the connector is completely disconnected by the additional operating lever.

A semiconductor device, wherein a substrate (51) is formed in a rectangular shape with four sides along dicing lines, and a jetty part (56) is formed to surround all the peripheries of an actuator element (50) and electrode pads (54) and (55) for input / output. The jetty part (56) is formed in a rectangular shape with four sides, and each side thereof is continuously extended parallel with each side of the substrate (51). Since the adhesion of a protective tape (9) can be increased by the jetty part (56), foreign matters (104) produced in dicing can be prevented from adhering to the actuator element (50) and the electrode pads (54) and (55).

The invention discloses a mechanical electromagnetic type fuel gas emergency shut-off valve which comprises a valve body, a shell, a valve deck, a valve element, a valve clack, reset springs and an actuating mechanism, wherein the valve element comprises a mandrel, a connecting rod, a cam and a pothook; the lower part of the mandrel is connected with the valve clack; the middle of the mandrel is mounted on the valve body in a sliding and sealing manner; the upper part of the mandrel stretches into the shell to be hinged to the lower end of the connecting rod; the cam and the pothook are rotatably mounted on the shell; one end of the cam is hinged to the upper end of the connecting rod, and a lug matched with the pothook is arranged at the other end of the cam; the lower part of the pothook abuts against the actuating mechanism, and the upper end of the pothook is hooked on the lug of the cam through the reset spring II. The mechanical electromagnetic type fuel gas emergency shut-off valve can be rapidly started under any circumstance, can resist against complex pipeline pressure, and is simple in structure, safe and reliable, unlikely to damage, long in service life, and applicable to popularization and application.

The invention discloses a sheet metal stamping die based on flat demoulding. Its structure includes an upper die, a die column, and a lower die. structure, the stamping structure is composed of top plate, middle plate, bottom plate and plate column, the top plate, middle plate and plate column are welded, the middle plate and the bottom plate are matched, and the bottom plate is equipped with a stripping device. The size is transmitted through the outer structure or the inner circle structure, and the inner square structure can be adjusted. The outer square frame can be adjusted to move on the outer square cone to realize the size reduction of the adjustable outer square frame. The inner square cone can be adjusted. Moving on the circle realizes the reduction of the diameter of the telescopic ring; then, when the mold is demoulded, the mold and the plate will not fit closely, and the local upward movement of the plate will not occur when the mold is demoulded, and the micro deformation of the plate will not occur.