48results about How to "Uniform wall thickness distribution" patented technology

A method of the drawing / ironing of a resin-coated metal sheet which comprises drawing a resin-coated metal sheet comprising a metal sheet and an organic resin with which at least one side of the sheet is coated and then ironing it with a punch and adjacent dies to thereby mold a can comprising a bottom, a side-wall part, and a flange-forming part. By the method, barrel breakage accompanying a reduction in the thickness of the can side wall can be effectively prevented. Furthermore, a drawn and ironed can having a thickness reduced to a predetermined value can be efficiently molded.

The invention discloses a device and method for hot forming of a titanium alloy corrugated pipe through current assistance, and relates to a device and method for hot forming of a corrugated pipe. The device and method for hot forming of the titanium alloy corrugated pipe through current assistance solve the problem that an existing titanium alloy corrugated pipe is difficult to manufacture, and high in cost and low in production efficiency. According to the device, the positive pole and the negative pole of an electrode (3) tightly sleeve the upper end and the lower end of a tube blank (10), a low-voltage high-current power source (5) is connected with the positive pole and the negative pole of the electrode (3) through a wire (4), a gas cylinder (7) is connected with a gas guide pipe (11) on the tube blank (10) through a gas pipe (6), and a forming die (2) is placed on a working platform of a press machine (1). The method comprises the steps that the first step, the tube blank (10) is manufactured; the second step, die setting is conducted; the third step, device installation is conducted; the fourth step, the corrugated pipe is formed; the fifth step, discharging is conducted; the sixth step, post-processing is conducted. The device and method are used for manufacturing the titanium alloy corrugated pipe.

The invention relates to a preparation method of a stainless steel / carbon steel chip core composite board, which comprises the following steps that: (1). stainless steel pipes and chips produced by carbon steel machining are used as raw materials; (2) the carbon steel chips are pressed into the stainless steel pipes to be made into bimetal composite billets; (3) the press-mounted stainless steel / carbon steel chip core composite billets are placed into a heating furnace to be heated at a heating temperature of 1100 to 1200 DEG C for insulation of 30 to 60 minutes; (4) the heated composite billets are rolled on a rolling mill; and (5) after being rolled to the required size, the composite billets are cut with a constant length. The method provided by the invention is simple, is low in cost, and is suitable for industrial mass production, the metallurgical bonding is formed between carbon steel chips and between stainless steel and carbon steel chips in the prepared stainless steel / carbon steel chip core composite board, the structure of the carbon steel chip core is continuous and dense, the surface quality of the composite board is good, and the wall thickness of the stainless steel is uniformly distributed. Compared with the stainless steel composite board produced by other methods, the stainless steel / carbon steel chip core composite board has more excellent performance-price ratio.

There is provided a method for manufacturing a seamless pipe or tube that is capable of making more uniform the wall thickness distribution of a pipe or tube along the longitudinal direction of the pipe or tube than the prior art. The method for manufacturing a seamless pipe or tube according to the present invention comprises a first step of measuring the outside diameter distribution of thg mandrel bar B along the longitudinal direction of the mandrel bar at normal temperature; a second step of measuring the temperature distribution of the mandrel bar along the longitudinal direction of themandrel bar in the mandrel bar after it being used for a drawing and rolling step in a mandrel mill M; and a third step of measuring the wall thickness distribution of the pipe or tube in the hot state after it being subjected to drawing and rolling with the mandrel bar being inserted thereinto, along the longitudinal direction of the pipe or tube. And the method comprises a fourth step of calculating the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar at the time of being used for drawing and rolling on the basis of the respective parameters which have been obtained at the first to third steps, and a fifth step of adjusting the setting position of the grooved roll R in the rolling direction on the basis of the outside diameter distribution of the mandrel bar along the longitudinal direction of the mandrel bar when the mandrel bar is inserted into the inside of a pipr or tube at the next timing for being used for drawing and rolling.

Disclosed is a several-time drawing formation device for a deep-cylinder-shaped piece. The several-time drawing formation device for the deep-cylinder-shaped piece comprises an upper die base and a lower die base. The upper die base and the lower die base are connected with guide pillars through ball bearing guide bushings, a protrusion locating piece is fixedly installed on the upper die base, nitrogen cylinders are arranged on the lower end of the protrusion locating piece, piston rods of the nitrogen cylinders and blank holders tightly press blank materials through a groove at the lower end of a rubber block, a protrusion main body is installed on the protrusion locating piece and is composed of a protrusion die, a polyurethane elastomer, a locating ring, a pressing plate and a protrusion die connecting piece, a cone-shaped concave mould is fixed on the lower die base, and an ejector rod ejects out a workpiece after several-time drawing are finished. Due to the fact that a nitrogen cylinder flange pressing device and the polyurethane elastomer are both used on the several-time drawing formation device for the deep-cylinder-shaped piece, efficiency and quality of drawing formation can be ensured.