43results about How to "Uniform and symmetrical distribution" patented technology

An RF diathermy coil assembly, including a generally elastically deformable patient conforming garment and a conductive coil secured to the garment. The conductive coil having a woven wire construction such that the coil can deform as the garment elastically deforms. The RF diathermy coil assembly can be used for wound healing in conjunction with muscle stimulation.

The invention discloses a fireworks inner tank for displaying caption pattern in the sky, comprising a tank body, a sealing layer and a timing lead; wherein the tank body inner cavity is filled with glowing medicament and connected with the timing lead, the tank body is provided with a plurality of small through holes, and the external port of the small through hole is sealed by a fireproof paperlayer. The fireworks inner tank for displaying the caption pattern in the sky can form bright spots without explosion and can realize accurate positioning in the sky when combining the caption pattern in the sky.

The present invention provides one kind of continuous metal bar zone refining and crystal fining process, and belongs to the field of metal material heat processing technology. The present invention features that the descending or ascending metal bar is made to pass through induction heating system for continuous zone smelting, while pulse current is applied to the metal bar via the pulse power source connected to the ends of the metal bar, with pulse current frequency being 1-10 KHz, applied voltage 50-1000 V, current peak value 50-5000 A, metal bar diameter 5-100 mm and moving rate of the metal bar 0.1-10 mm / s.

The invention discloses a technology for improving the dissimilar metal Mg-Fe spot welding quality through microalloying. The technology comprises the steps that firstly, Mn powder, Al powder and a volatile solvent serve as raw materials to prepare an alloy pulp cluster; secondly, when the alloy pulp cluster has proper viscosity, the alloy pulp cluster is scraped to the lap joint connector position of a to-be-welded Mg material and a to-be-welded Fe material, and accordingly the to-be-welded materials are subjected to pretreatment; and thirdly, a lap joint connector of the Mg material and the Fe material is subjected to spot welding. Adoption of the technology for improving the dissimilar metal Mg-Fe spot welding quality through microalloying has the obvious beneficial effects that the size of molten cores between the dissimilar metal Mg and Fe after spot welding is increased, distribution of the molten cores between Mg and Fe is uniform and symmetric, the anti-shearing performance between the dissimilar metal Mg and Fe after spot welding is obviously improved, and the spot welding quality between the dissimilar metal Mg and Fe is improved.

The invention relates to opposite roller spinning equipment, in particular to opposite roller spinning equipment for forming a large thin-walled cylindrical part, and aims to solve the problems that existing die spinning equipment is high in cost, poor in universality and long in manufacturing period as a core die is needed. A chuck substrate fixing base is installed on a rack between an internal rotation guide rail and an external rotation guide rail, a chuck substrate is installed on the chuck substrate fixing base, an external rotation mechanism fixing base is installed on the external rotation guide rail in a sliding mode, and an external rotation disc is installed on the external rotation mechanism fixing base; a bottom plate is installed on an internal rotation guide rail, a lifting motor is installed at the lower end of the bottom plate, one end of a lifting lead screw penetrates through the bottom plate, and the other end of the lifting lead screw is connected with a base; an internal rotation device fixing base is installed on the bottom plate, a worm and gear assembly is installed on the chuck substrate, a three-claw chuck is installed on the worm and gear assembly, multiple pull rods are connected with the external rotation disc, the chuck substrate and the base, an internal rotation device is installed in the internal rotation device fixing base, and the external rotation device is installed in the external rotation disc. The opposite roller spinning equipment is suitable for carrying out opposite roller spinning on the large thin-walled cylindrical part.

The invention provides a photocathode ultrafast electron gun wherein the cathode is of an axis-symmetrical structure and comprises a first cylindrical side face, a round bottom face and a first connection face to have the first cylindrical side face connected with the round bottom face. The center of the round bottom face is provided with a light penetration hole. The outer side of the round bottom face is provided with a round groove to hold a metal film. The anode is of an axis-symmetrical structure and comprises a round top face, a second cylindrical side face, a round bottom face and a second connection face to have the round top face and the second cylindrical side face connected. The round bottom face extends outwardly in the radius direction of the lower edge of the second cylindrical side face. The center of the round top face is provided with a through hole and the first connection face is provided with a round chamfer angle, and the second connection face is provided with an elliptical chamfer angle.

The invention discloses a method of improving Al-Cu spot welding quality. The method comprises the following steps: one, Mn powder and Zn powder are weighed according to a mass ratio of (6-10):(1-3); two, the Mn powder and the Zn powder are proportionally mixed uniformly, a volatile solvent is added, and an alloy powder paste is formed through blending; three, the alloy powder paste is stirred, after the viscosity of the alloy powder paste is 0.5-0.55Pa.s, overlap joints of a Al material and a Cu material which are to be welded are subjected to knife coating with the alloy powder paste, and alloy powder paste layers are formed at the Al material and the Cu material; and four, the overlap joints of the Al material and the Cu material are subjected to spot welding. The method has the significant effects that the cast nugget size of dissimilar metal Al-Cu is increased, cast nuggets are distributed uniformly and symmetrically between Al and Cu, the shearing resistance of the dissimilar metal Al-Cu is improved significantly, and thus the spot welding quality of the dissimilar metal Al-Cu is improved.

The invention relates to the technical field of steering knuckles, in particular to a method for improving the elongation rate and shrinkage rate of a steering knuckle rod. , a transition arc is provided at the junction of the rod part of the steering knuckle and the disk part, and the transition arc forms an annular surface around the axis of the rod part, and the radius of the transition arc on the side of the annular surface close to the long ear of the steering knuckle is R 1 , the R 1 is a fixed value, the radius of the transition arc on the side of the annular surface close to the short ear of the steering knuckle is R 2 , taking the plane where the shaft axis of the steering knuckle and the axis of the king pin hole are located as the reference plane, the R 2 uniformly decreases to R with the deviation from this reference plane 1 , the present invention can facilitate the filling of the rod part, reduce the shear damage of the internal metal streamline during the forming process of the steering knuckle rod part, and avoid the reduction of the mechanical performance of the rod part; Symmetrical; improved stress distribution at the junction of the knuckle stem and disc.

The invention discloses an internal rotation feeding device for large thin-wall cylindrical part pair wheel spinning equipment, relates to an internal rotation feeding device, and aims to solve the problems of high mold cost, weak generality and long manufacturing period in traditional mold spinning equipment. A conical wedge block coats a feeding lead screw; multiple internal rotation wheel bases are annularly and uniformly mounted on the conical wedge block; one rotating shaft is vertically and rotationally mounted in each internal rotation wheel base; one internal rotation wheel is mounted on each rotating shaft; cross chutes are respectively formed in a rotating base guide sleeve and a wedge block guide sleeve, and are mutually aligned and buckled up and down; a transition sleeve coats the feeding lead screw, and is positioned at the upper end of the wedge block guide sleeve; an upper cross beam is mounted on the transition sleeve; an internal rotation motor is mounted on a speed reducer for transferring power to a speed reducer; and the speed reducer drives the feeding lead screw to rotate. The internal rotation feeding device is suitable for the thin-wall cylindrical part pair wheel spinning equipment.