News
You are here: Home > News > Content

Technical Requirements For Flanges Production

Edit: Jingjiang Jinlun Machine Manufacturing Co.,Ltd    Date: Sep 05, 2017

Technical Requirements for Flanges Production
       Flanges in the forging plant production, the rational size of the steel ingot before the furnace should be calibrated its smelting furnace number, steel, billet weight, size, and check the surface quality, remove the surface defects. Record the location of the furnace, do the actual production of Flanges production records.
       The position of the ingot used in the furnace shall be determined by the distance from the furnace, the front and rear walls, the burner, etc., depending on the furnace type, the bottom size, the furnace type and the weight of the heated ingot. It is forbidden to direct the flame to the surface of the Flanges metal. The Flanges should be used to heat the wrought before forging. The height of the horn should not be lower than the height of the furnace under the burner. Diameter or side length of less than 150mm Flanges billet heating can not use horn.
       Flanges used in the furnace into the furnace before the surface temperature is lower than 400 ℃ called cold steel ingots, 400-550 ℃ called semi-hot steel ingots, higher than 500 ℃ called hot steel ingots. Hot and cold steel ingot (billet) with a furnace, the spacing between the material must be greater than a blank diameter or side length. Should try to avoid mixed hot and cold steel ingots a furnace.
       It is strictly forbidden to put cold steel ingots (blanks) beside the heated Flanges blanks. It is forbidden to heat the ingot (billet) directly with the actual temperature of the spindle below 0 ℃. Inspection of qualified hot steel ingot transported to the Flanges production workshop, should avoid cold air straight blow, should be fashionable furnace, shall not delay the furnace time.
 The preparation of the Flanges before forging includes raw material selection, calculation, cutting, heating, calculation of deformation force, selection of equipment, design mold. Forging before the need to choose a good lubrication methods and lubricants.
      Forging materials involved in a wide range, both a variety of grades of steel and high temperature alloys, and aluminum, magnesium, titanium, copper and other nonferrous metals; both after a processing into different sizes of bars and profiles, there are a variety of Specifications of the ingot; in addition to a large number of domestic materials suitable for China's domestic materials, but also from foreign materials. Most of the Flanges material has been included in the national standard, there are many development, trial and promotion of new materials. As we all know, the quality of the Flanges products are often closely related to the quality of raw materials, so the workers of the Flanges factory, must have the necessary knowledge of the material, to be good at the process requirements to choose the most suitable material.
 Calculation and cutting is to improve the utilization of Flanges materials, to achieve one of the important aspects of rough refining. Excessive material not only causes waste, but also increases the mold wear and energy consumption. If you leave a little margin, will increase the difficulty of process adjustment, increase the rejection rate. In addition, the quality of the end of the material on the quality of the process and Flanges also have an impact.
      The purpose of heating is to reduce the forging deformation force and improve the metal plasticity. But the heating also brings a series of problems, such as oxidation, decarbonization, overheating and overgrowth. Accurately control the initial forging and final forging temperature, the product organization and performance have a great impact.
      Flame furnace heating has the advantages of low cost, strong applicability, but the heating time is long, easy to produce oxidation and decarburization, labor conditions also need to improve. The induction heating has the advantages of rapid heating and less oxidation, but it has poor adaptability to the product shape size and material change.
      Flanges forming is generated under the action of external force, therefore, the correct calculation of deformation force, is the choice of equipment, the basis for mold verification. Stress and strain analysis of the interior of the deformable body is also indispensable for optimizing the process and controlling the performance of the Flanges.
      There are four main methods of deformation analysis. Although the main stress method is not very tight, but relatively simple and intuitive, you can calculate the total pressure and Flanges and tool contact surface stress distribution. The slip line method is strict for the plane strain problem, and the stress distribution is more intuitive for the local deformation of the high parts, but the application range is narrow. The upper limit method can give an overvalued load, and the upper limit element can also be expected to change the Flanges shape when deformed. Finite element method can not only give the external load and Flanges shape changes, but also can give the internal stress and strain distribution, the disadvantage is that the computer with more machine time, especially in the elastic-plastic finite element solution, the need for larger computer capacity , The machine is longer. There have been recent trends using joint methods to analyze problems, for example. With the upper limit method for rough calculation, in the key parts with finite element calculation.
      Reduce friction, not only can save energy, but also can improve the die life. As the deformation is relatively uniform, help to improve the organizational properties of Flanges products, one of the important measures to reduce friction is to use lubrication. Due to the different forging processing of the Flanges and the difference in operating temperature, the lubricants used are also different. Glass lubricants are used for high temperature alloys and forged alloys. For steel hot forging, water-based graphite is a widely used lubricant, for cold forging, due to high pressure, forging before the need for phosphate or oxalate treatment.

Jingjiang Jinlun Machine Manufacturing Co.,Ltd