44results about How to "No dross" patented technology

The invention relates to manufacturing process and equipment for the upset forging of flanges, relating to manufacturing process and equipment for flanges. The manufacturing process comprises the following steps of: making materials into flange metal semicircles, evenly heating and butting the flange metal semicircles by adopting upset forging equipment, wherein the pressure on an extrusion surface is 40 to 70MP and the heating temperature is 500 to 1300 DEG C; and quickly connecting the two semicircles after the extrusion through the upset forging equipment to obtain a product. The inventionhas the advantages of capability of producing various annular steel flanges and aluminum flanges with different specifications only by using the upset forging equipment and simple matched moulding beds so that the investment in equipment and the energy consumption only account for a fraction or one of dozens of that of traditional equipment, cost is saved by more than 30% and production efficiency is increased by several times.

The invention provides a zinc chemical surface treatment technology, which is characterized in that: the zinc chemical surface treatment technology comprises the following steps of: carrying out deoiling, rust-removing, washing and drying treatment for surfaces of a steel screw workpiece; preparing a zinc penetrating agent; carrying out zinc penetrating treatment on the steel screw workpiece; cooling the steel screw workpiece; carrying out flushing and polishing treatment, passivating treatment and air-drying treatment on the steel workpiece; and electroplating the steel screw workpiece at 20-30 DEG C under a condition of 2.0A / dm2 of current density, wherein the steel screw workpiece needed to be electroplated is used as a cathode, a zinc plate is used as an anode, an area ratio of the anode to the cathode is 2:1, and an electroplating solution is an alkaline and cyanide-free galvanizing solution. The zinc chemical surface treatment technology combines the zinc penetrating technology and a galvanizing technology to carry out surface treatment on a steel screw, and combines advantages of the two technologies, and the treated steel screw has advantages of brightening surface, no zinc slag, no zinc flow, accurate dimension, good zinc layer thickness and good antirust effect.

This invention discloses an industrial fuel gas used for metal cutting and welding. Additive and dimethyl enther are added to cylinder to make-up the fuel, dimethyl enther is 40~99.9% and other rest additive. The additive is consisted by one or any several kind of following fuels as arbitrary proportion, petroleum liquefied gas, propane, butane, propylene, pentane, clean oil, methanol, ethanol. This invention has good burning property, security, environmental protection capability and extra high burning flame temperature. Comparing to acetylene, it is not easy to bomb, and its storage, transportation, using and management is more convenient and safe. There is no pollution to environment and operator. Its preheating and cutting velocity is fast, welding and welding line quality is good, oxygen consumption is low, so it improves work efficiency and reduces cost.

The invention discloses a red copper crucible welding method, and belongs to the technical field of red copper crucible welding. Welding joints are high in quality, air flow is protected to be stable, surrounding air can be effectively isolated, a weld pool is stable during welding, flashing is little, air holes are not generated easily, argon arc welding heat is concentrated, temperature is high, welding speed is high, and arcs are stable. When a red copper crucible is welded in an argon arc welding mode, no slag or splashing is generated, the weld pool and the electric arcs are good in resolvability, and operation is convenient.

The invention discloses novel industrial cutting gas with dimethyl ether as a main component. The novel industrial cutting gas comprises (but not limited to) the following components in percentage by mass: 60-99.99% of the dimethyl ether, 0.01-40% of additives and the like, wherein the additive is prepared from tert-butylferrocene, diethyl ether, aromatic hydrocarbon, solvent oil No.6, tert-butyl alcohol and potassium permanganate according to a certain proportion. Auxiliary gas can also be added into the cutting gas and is one or some of acetylene, propane, propylene, butane and butylene. The novel industrial cutting gas disclosed by the invention presents strong advantages in the aspects of economy, safety, environment friendliness and cutting performance.

The invention relates to a combustion synergist for natural gas and liquefied petroleum gas used for cutting and welding of metals. The combustion synergist comprises a solvent, a solubilizing agent, a combustion catalyst, a combustion improver and a dispersant. The combustion synergist provided in the invention can substantially improve combustion temperature, heat and speed of industrial fuel gas, enables a high flame temperature, a short preheating time, a fast cutting speed, a smooth cutting surface of metals and no adherent dross to be obtained during cutting of metals, can be fully mixed with industrial fuel gas, promotes complete combustion of industrial fuel gas, does not produce black smoke, residues or pollutants and has the advantages of safety, convenience, environmental friendliness, convenient popularization and application, etc. The combustion synergist can be widely used for a variety of industrial fuel gas and is especially applicable to natural gas and liquefied petroleum gas.