Category: Manufacturing Technology knowledge

For metals, in order to improve the use performance of metals, manufacturers will improve the surface treatment of metals. In our daily life, the common metal surface treatment technologies are: pickling purification treatment, electrolytic polishing treatment, degreasing and rust removal treatment, electroplating treatment and chemical treatment. The following is a detailed explanation of the six metal surface treatment technologies of China Standard Parts. Pickling and passivation treatment: It refers to that the process can be completed by immersing metal parts in pickling and passivation solution until the workpiece surface becomes uniform and silvery white. It is not only simple to…

1、 Selection of antirust oil The variety of antirust oil is complex, and the selection principles are as follows: 1. According to the metal type, different antirust oils have different antirust effects on different metal materials. Some have good antirust effects on ferrous metals, but the effect on copper is average. These are often described in the product description of antirust oils, which should be selected carefully. 2. According to the structure and size of metal products, solvent dilution type or grease type can be selected for those with simple structure and large surface area, while oil type is better…

1、 Basic principles for selecting stamping materials: In stamping production, the following basic principles should be followed when selecting raw materials for stamping parts. 1. Stamping die steel shall have usability to ensure the function of parts after stamping. 2. The materials shall have good universality of processing technology, and the selected materials shall adapt to the characteristics of stamping process and be easy for stamping. 3. The materials shall be easy to process, stable in forming, easy to obtain high-quality and high-precision stampings, and shall reach the number of stampings with specified burr height, so as to avoid waste…

Blister: a plastic processing technology. The main principle is to heat and soften the flat plastic hard sheet, and then use vacuum to adsorb it on the mold surface. It is formed after cooling. It is widely used in plastic packaging, lighting, advertising, decoration and other industries. Blister packaging: a general term for plastic products produced by Blister process and packaged with corresponding equipment. Blister packaging products mainly include: blister shell, tray, blister box, synonyms also include: vacuum cover, blister cover, etc. Blister packaging equipment mainly includes: Blister molding machine, punch, sealing machine, high-frequency machine, folding machine. The packaging products…

Fastener standards (DIN German standard, GB national standard, ASME/FI/ANSI American standard, Q standard, PEM standard, JB standard machinery department, EN European standard, ISO international standard, JIS Japanese standard, HG chemical standard, NFE French standard, UNI Italian standard, BS British standard, other commonly used standards. National standards for fasteners: GB/T 1237-2000 Fastener Marking Methods GB/T 152.1-1988 Fasteners - Through holes for rivets GB/T 152.2-1988 Counterbores for Fasteners GB/T 152.3-1988 Fasteners - Counterbores for Cylindrical Heads GB/T 152.4-1988 Fasteners Countersunk Holes for Hexagon Bolts and Hexagon Nuts GB/T 16823.1-1997 Stress Sectional Area and Bearing Area of Threaded Fasteners GB/T 16823.2-1997 General Rules…

Introduction to Hardware Stamping Parts Hardware stamping refers to forming nonferrous metal and other plates into specified shapes by using molds and the press to provide the pressure required for processing at room temperature. Metal stampings are widely used in various fields of our lives, including some electronic devices, auto parts, decorative materials, and so on. Generally speaking, stamping parts refer to cold stamping parts. Characteristics of metal stamping parts 1. Metal stamping parts are manufactured by stamping under the premise of small material consumption. The parts are light in weight and have good stiffness. After plastic deformation of the…

The rubber joint is composed of fabric reinforced rubber parts, flat union, loose metal flange or threaded pipe flange, and is used for vibration isolation and noise reduction and displacement compensation of pipes. It is a pipe joint with high elasticity, high air tightness, medium resistance and weather resistance. It can be divided into concentric equal diameter, concentric reducer and eccentric reducer according to the shape. It can be divided into single sphere, double sphere and elbow sphere according to the structure. It can be divided into flange connection, threaded connection and threaded pipe flange connection according to the connection…

The causes of abnormal machining accuracy are hidden and difficult to diagnose. Five main reasons are summarized: the machine tool feed unit is changed or changed; The zero point offset of each axis of the machine tool is abnormal; Abnormal axial reverse clearance; Motor operation status is abnormal, that is, electrical and control parts are abnormal; Mechanical failure, such as lead screw, bearing, coupling and other components. In addition, the preparation of machining program, the selection of tools and human factors may also lead to abnormal machining accuracy. 1、 Causes of abnormal machining accuracy. The causes of abnormal machining accuracy…

During later processing, the steel plate will be deformed after cutting due to warping, resulting in scrapping of workpieces, affecting the normal use of users, and causing economic losses to the enterprise. The analysis shows that there are residual stresses in the internal and upper and lower surfaces of the steel plate after hot rolling. If the residual stresses are distributed unevenly along the width and length of the steel plate, a moment will be generated on the steel plate section, which will cause the steel plate to warp after cutting. The control measures are: 1. TMCP technology The new…

1、 Stamping parts 1. Sharp edge deburring, stamping notch roughness 6.3 2. Punch surface oxidation treatment: H.Y. or (galvanized dull color on the surface. Zn8. DC.) 3. The limit deviation of dimensions without tolerance indications shall be in accordance with GB/T 1804-92 m level 2、 Castings 1. The casting shall be free of defects such as air hole, slag inclusion and crack. 2. Unspecified casting slope is 1-2.5%% d. 3. The casting tolerance shall comply with GB6414-86CT6 4. Unspecified casting fillet is R1-R2.5. 5. The limit deviation of dimensions without tolerance indications shall be in accordance with GB/T 1804-92 m…