Company News

• Copper nut introduction

  2020 / 12 / 26

  Copper nut introduction Copper nuts are defined as nuts made of copper material, usually lead brass, such as H59,H62. why copper nuts is widely used in daily production activities? Because copper nut has the advantages of not easy to rust, anti-corrosion, good heat conduction and strong electrical conductivity. Copper brass nut is generally used in anti-rust, high temperature, conductive, heat conduction and other use environment, such as faucet, valve, electrical switch and so on. Another major use of copper nuts is injection molding, which is heat embedded in plastic parts or directly molded. Brass have good thermal conductivity, after heating copper nut embedded,heated copper nut can quickly transfer heat to plastic parts, so that the plastic parts become soft, easy to pressing into. The shape of the copper nut used in injection molding is generally round with various forms of pattern, and the hot melt of the mould is generally cylindrical (as shown below). The shape of the hot pressing or cold pressing copper nut has a certain taper or barbed shape (as shown in above ) Lanejoy workshop have more than 20 pcs CNC lathe to produce various cop

• Classification of springs

  2020 / 12 / 25

  According to the force feature, the spring can be divided into tension spring, compression spring, torsion spring and bending spring. According to the shape, spring can be divided into disc spring, ring spring, plate spring, spiral spring, truncated cone vortex spring and torsion bar spring. Because the common cylindrical spring is simple in manufacture and can be made into various types according to the load condition, the structure is simple, so it is most widely used. Generally speaking, spring manufacturing materials should have high elastic limit, fatigue limit, impact toughness and good heat treatment properties. The commonly used materials are carbon spring steel, alloy spring steel, stainless spring steel, copper alloy, nickel alloy and rubber. Spring manufacturing methods include cold coil method and hot coil method. Spring wire diameter less than 8 mm generally by cold coil method, more than 8 mm by hot coil method. Some springs have to be made after strong pressure or shot penning treatment, can improve the bearing capacity of the spring. Torsional spring is a spring that bears torsional deformation, and its working part is also tightly wound into a spiral shape. The torsion spring end structure is a torsion arm processed into various shapes, not a hook ring. By using the lever principle, the torsion spring has great mechanical energy by twisting or rotating the elastic material with soft and toughness. The tension spring is a spiral spring that bears axial tension. When not under load, the ring and ring of the tensile spring are generally tight without clearance.

• How to solve the small problem in the process of producing spring

  2020 / 12 / 25

  In the processing and production of hardware spring, there are always a variety of small problems, so how to deal with it? If air furnace heating quenching does not protect gas or salt bath deoxidization is not enough, it may cause decarbonization, the solution is air furnace heating quenching should pass protection gas or drop organic solution protection,salt bath should be deoxidized when salt bath furnace heating, impurity BAO mass fraction less than 0.2; strengthen the surface quality inspection of raw materials. 2. if the hardness is insufficient after quenching, the service life of the hardware spring will decrease and the residual deformation. Solution is to choose steel with good harden-ability, improve the cooling capacity of quenching medium, the temperature of metal spring entering quenching medium should be above AR3, raise the heating temperature of quenching properly, and make metallographic structure test after strengthening quenching. 3. temperature overheating will cause coarse grains and increase brittleness. Solution is to do heating and quenching according to the correct temperature of process test; reducing the thermal forming temperature appropriately or strengthening the proofreading of the instrument to ensure the accuracy of temperature measurement. 4. cracking is mostly happen due to high thermal temperature or excessive cooling capacity of quenching medium, surface decarbonization and untimely tempering. Solution is to use isothermal quenching or martensite grading quenching; cold in quenching medium to 250~300 oC take out air cooling; tempering immediately after quenching