39results about How to "Uniform pitch" patented technology

In a newly manufactured roller chain, the pitch measured from one of two adjacent bushings of any two consecutive inner links of the chain to the other is greater than that measured from any of said inner links of the chain The pitch measured from one of the two bushings on one to the other is a small amount corresponding to the initial lengthening of the chain.

Intended is to provide twisted flat bar manufacturing method and apparatus, which can suppress the dispersion of pitches and which can work even a long flat bar into a twisted flat bar. The twisted flat bar manufacturing method is characterized in that a flat bar (5) is clamped on its two faces by two round bars (7) which are arranged at an equal direction but in different direction with respect the longitudinal direction of the flat bar, in that the two round bars are rotated on that longitudinal direction relative to the flat bar, and in that the flat bar is moved in that longitudinal direction relative to the round bars.

Disclosed are an apparatus for directly drawing a helical annular quartz tube using a continuous smelting method and a method for drawing a helical annular quartz tube using the apparatus. The apparatus comprises a rotating coiler arranged below a material outlet of a continuous smelting furnace, wherein the rotating coiler is fixed onto a support plate via a support frame, a lower part of the support plate is provided with a left / right moving mechanism driving the rotating coiler to move to the left and right, a lower part of the left / right moving mechanism is provided with a front / rear moving mechanism, and a lower end of the front / rear moving mechanism is arranged on a lifting mechanism. The rotating coiler comprises a rotating drum, wherein the rotating drum is fixed on a rotary shaft, the rotary shaft is connected to a driving electric motor via a transmission, and a quartz tube pressing plate is provided on the rotating drum. A quartz tube descent traction machine is provided between the material outlet of the continuous smelting furnace and the rotating coiler, and a quartz tube cutter is provided between the quartz tube descent traction machine and the rotating coiler.

The invention provides a manufacturing method of the sprockets of an alloy zipper, in particular to a manufacturing method of the sprockets of an alloy zipper, which forms the sprockets by a pouring mode, fixes the sprockets on a fabric tape of the zipper and then plates the sprockets. The invention can ensure the problem of the rate of finished products with a certain height. The manufacturing method comprises the following steps of: weaving the fabric tape of the zipper and a static wire; pouring the sprockets; separating the sprockets from a sprue and a pouring gate; and electroplating thesprockets. The invention has the following advantages that: (1) because of adopting a pouring die for forming, the surfaces of the sprockets formed in the pouring die are also smooth and round; (2) when the sprockets are formed, the sprockets are fixedly connected with the fabric tape of the zipper into a whole, the combination is firm and reliable, and the condition that the phenomenon of sprocket fall can not occur is ensured; (3) the rate of finished products is ensured; (4) the accurate positioning of the sprockets and the static wire is ensured, the stability of the point connection between tens of respectively independent sprockets during electroplating is ensured, the success rate of electroplating is ensured, and the fraction defective of the electroplating is greatly lowered; and(5) the appearance is bright, attractive and smooth, the smoothness during pull and combination is increased, and the service life of the alloy zipper is prolonged.

The invention discloses a method for manufacturing a steel strip for a central cooling tube and a method for winding the cooling tube, wherein the method for manufacturing a steel strip for a central cooling tube comprises steps of first annealing, twice cold drawing, second annealing, acid washing, third annealing, twice cold rolling, third annealing and twice cold rolling again. The method for winding the cooling tube comprises the steps of the installation and the correction of a strip guiding wheel, the installation and the correction of a winding tooling, the installation and the correction of a tooling for measuring the external diameter of the cooling tube, the installation and the correction of a synchronous back twisting device, pitch correction, winding and cleaning. The rectangular steel strip manufactured in the invention has fine conformity, and the central cooling tube manufactured by winding the rectangular steel strip has perfect appearance; the surface of the central cooling tube has no lateral reverse curve, and the external diameter and the pitch of the central cooling tube are uniform to fulfill various kinds of tolerance requirements in practical use; the central cooling tube has great continuous winding length, has a wide range of application in the manufacture of a fusion reactor superconductor in the future, and already has practical application especially in the R&D (Research & Development) and preproduction phases of the superconductor in ITER (International Thermonuclear Experimental Reactor) which is the cooperation of 7 parties at present.

This invention relates to whirl compressor multi-line whirl disc, which gets multiple whirl lines by single whirl line for 360 degrees, wherein, whirl discs on compressor comprise double line whirl disc, three-line whirl disc and four-line whirl disc; the static disc multiple lines are connected on extension center into one part; the dynamic disc multiple lines are connected on extension center into one part.

The invention relates to a fixture for winding rectangular-section wire torsional springs. The fixture comprises a bed plate and a guide support arranged above the bed plate. The guide support is connected with the bed plate in a matched manner by a first screw rod, a support moving handle is connected with one end of the first screw rod in a matched manner, and the support can move from left to right on the bed plate by turning the support moving handle. A correction clamp plate is arranged on the right side of the guide support, a groove type guide wheel is arranged on the left side of the guide support, and a wire with a rectangular section sequentially penetrates through the correction clamp plate and the groove type guide wheel to be wound on a torsion mandrel. The invention further provides a method for winding the rectangular-section wire tensional springs. By the aid of the method, appearance quality of the torsional springs can be guaranteed, sizes of outer diameters of the torsional springs are consistent, and pitches are uniform. By the aid of the fixture and the method, accuracy of guiding can be guaranteed, deflection of feeding is effectively prevented, distance between a feeding outlet and the torsion mandrel can be adjusted, consistency and reliability of winding torsional spring forming are guaranteed, deflection and lodging of the torsional springs can be further avoided during winding.

The invention discloses a tread layering method in a tire winding machine forming process. The method comprises the steps of selecting turning points on a tire tread and calculating the coordinates of each turning point in a coordinate system; obtaining equal diversion points of each turning point between a left side edge and a right side edge on a vertical coordinate line, connecting the equal diversion points on each layer as layering points, making horizontal lines parallel to the X axis along the equal diversion points on the vertical coordinate lines of the highest points of the left side edge and the right side edge, and using the intersection points of the horizontal lines and the left side edge and the right side edge as layer points; sequentially writing the layering points into an array according to the outline position and connecting the points on each layer in the array to realize layering of the tread. The method can realize uniform thickness of each layer after layering, so that the screw pitches of the wound model are uniform, and the uniform screw pitch distribution facilitates greatly reducing air bubbles during winding.

The invention relates to the technical field of cables, and discloses a cable for oil platforms with high flame retardancy, comprising a cable body, wherein the cable body includes a conductor located in the middle, the conductor is wound with a wrapping layer, and a plurality of The conductor is covered with an insulating layer, and the insulating layer is covered with an outer sheath. The oil platform cable with high flame retardancy has the advantages of environmental protection, high flame retardancy, strong mechanical performance, mud resistance, oil resistance and cold resistance.

The screw roll fixed-pitch stretching equipment consists of motor, high-speed belt drive stage, low-speed belt wrive stage, driving rubber roller, differential rubber roller, driving conic roller, driven conic roller, speed-regulating screw, shaft and bearings. The motor drives the small belt pulley of high-speed belt drive stage; the driving conic roller, the large belt pulley of high-speed belt drive stage and the driving rubber roller are on the drive shaft; the driven conic roller and the small belt pulley of low-speed belt drive stage are on the middle shaft; the large belt pulley of low-speed belt drive stage and the differential rubber roller are on the driven shaft; there is speed regulating screw with control handle installed between the driving conic roller and the driven conic roller; and the bearings are mounted on the box.

The invention discloses a ceramic metal halogen lamp electrode which comprises a main rod made of thorium-tungsten alloy materials; a yttrium-molybdenum alloy-wire spiral body is wound on one end of the main rod, and a high-purity tungsten wire spiral body is wound on the other end of the main rod; and the main rod end part on which the yttrium-molybdenum alloy-wire spiral body is wound is connected with an outer-lead niobium rod. The invention is a high-effective and environment-friendly ceramic metal halogen lamp electrode and has the advantages of high efficiency, safety, environment protection, even electrode spring, and the like.