Classification editing of metal manufacturing
The forming process of metal materials is divided into cold working (machining, cold rolling, cold forging, stamping, etc.) and hot working (casting, hot rolling, forging, welding, heat treatment, etc.) according to its characteristics.
1. Deformation processing
(1) Plastic forming processing
Plastic (forming) processing refers to plastic deformation of a metal under stress by a mold under high temperature heating.
(2) Solid molding processing
Solid molding processing means that the raw materials used are some metal strips, sheets and other solid forms that can be molded under normal temperature conditions. Processing costs can be relatively cheap.
(3) Pressure processing
The production process of raw materials, blanks or parts having a certain shape, size and mechanical properties is obtained by utilizing the plastic deformation of the metal under the action of an external force, which is called press working.
The basic way of pressure processing: forging, Sheet metal stamping, rolling, extrusion, drawing.
(4) Powder metallurgy
Powder metallurgy A process that can process ferrous metal components as well as non-ferrous metal components. This includes two basic processes of mixing the alloy powder and pressing the mixture into the mold. The metal particles are formed by high temperature heating and sintering. This process does not require machine processing and raw material utilization can reach 97%. Different metal powders can be used to fill different parts of the mold.
2, cutting processing
For parts with high dimensional, shape, and positional accuracy and finer surface roughness, cutting methods are usually used.
A metal cutting machine is a device that uses a tool to cut a metal blank, usually referred to as a machine tool.
3, grinding processing
Grinding is a processing method that uses abrasive to remove material.
Usually classified according to the type of tool, it can be divided into two categories: fixed abrasive processing and free abrasive processing.
Generally speaking, grinding mainly refers to a process for removing material processing by a grinding wheel or an abrasive belt, and it is a highly efficient and precise final processing method which is widely used.
Welding is a process for permanently joining metallic materials. The essence of the welding process is that the separated metal materials are firmly connected by means of heating or pressure, by means of the combination and diffusion of metal atoms.
According to the characteristics of the welding process: melting welding, pressure welding, brazing three major categories.
5, surface treatment
Heat treatment is a process in which a certain degree of mechanical or chemical properties are obtained by heating and cooling a metal under certain conditions.
The main purpose of heat treatment of metal parts is:
Improve hardness, strength and increase wear resistance
Reduce hardness and facilitate machining
Eliminate internal stresses caused during processing
Improve surface wear and corrosion resistance
Metal fabrication features editing
(1) The adaptability to the shape and size of the casting is strong. It can produce blanks of various shapes and sizes, and is particularly suitable for the manufacture of parts with complex internal cavities.
(2) Strong adaptability to materials. It can be adapted to the forming of most metal materials, and has unique advantages for casting materials that are not suitable for forging and welding.
(3) The cost of castings is low. This is because the source of the foundry raw material is rich, and the shape of the casting is close to the part, which can reduce the amount of cutting and reduce the casting cost.
Therefore, casting is one of the most important methods for the production of blanks, such as 60% to 80% by weight of the machine tool and 50% to 60% of the machine by casting. However, due to many casting process steps, a variety of casting defects are easily generated, and the general casting grains are coarse and the mechanical properties are not as good as forgings. Therefore, castings are generally not suitable for making important parts with complex forces and large forces, but mainly for parts that are not stressed or subjected to simple static loads (especially suitable for compressive stress), such as boxes, beds, brackets, Stand and so on.
Metal product industry scope editor
Metal products include: tools, fixtures, general hardware, bearings, locks, molds, mechanical equipment, fasteners, metal, screwdrivers, instrumentation, plumbing hardware, hardware
DESHENGRUI Machinery is a professional CNC manufacturing and Sheet metal fabrication company, including CNC machining services, CNC Turning service, CNC milling services, CNC drilling services, laser cutting services, stamping services, Die casting service, iron casting service and Steel Forging service.