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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…

The aluminum laser cutting equipment used are optical fiber laser cutting machine and YAG laser cutting machine. These two types of equipment have excellent performance in cutting aluminum or other materials, such as stainless steel and carbon steel. From the experience of laser cutting aluminum materials for many years, the difference between the two is still large, which can be divided into three levels: first, the quality of cutting, second, the cutting speed, and third, the production cost (the production cost here is mainly the life loss of equipment). 1. Cutting quality Aluminum profiles are highly reflective materials, so neither…

As the main technology of steel structure fabrication and connection, welding has been widely used in the fabrication and installation of steel structures. However, the deformation problem generated in welding not only affects the appearance and service performance of steel structures, but also even leads to the scrapping of weldments if it is serious, causing direct economic losses to enterprises. Especially in the welding of large steel structures, this problem is particularly prominent. In view of this, it is necessary to comprehensively analyze the different types and causes of welding deformation, and take effective measures to control the amount of…

Modern sensors vary in principle and structure. How to reasonably select sensors according to the specific measurement purpose, measurement object and measurement environment is the first problem to be solved when measuring a certain quantity. After the sensor is determined, the corresponding measurement method and equipment can be determined. The success or failure of the measurement results, to a large extent, depends on whether the sensing is reasonable. 1. Determine the type of sensor according to the measurement object and measurement environment To carry out a specific measurement, it is necessary to first consider which principle of sensor to use,…

1、 Opening direction and parting line The opening direction and parting line of each injection molding product must be determined at the beginning of design to ensure that the core pulling slider mechanism is reduced as much as possible and the influence of parting line on the appearance is eliminated. 1. After the mold opening direction is determined, the stiffeners, buckles, bulges and other structures of the product shall be designed to be consistent with the mold opening direction as much as possible to avoid core pulling, reduce the seam line and extend the life of the mold. 2. After…

Reducing the internal stress of products is the key to the injection molding of heat-resistant ABS. In this paper, the author shared the processing points of heat-resistant ABS resin molding from five aspects, including mold design, material drying, molding temperature, holding pressure and time, and mold temperature. The heat resistance of ordinary ABS is not good enough. Now, by adding ɑ- A series of heat-resistant ABS resins have been developed with heat-resistant agents such as methyl styrene copolymer and N-phenyl maleimide copolymer. The HDT is 90-120 ℃. For example, the Economic&Easy series heat-resistant ABS resin of Shanghai Jinhu Rili can…

Mold manufacturing technology A new precision and high processing and forming method In modern processing and manufacturing, mold parts are generally formed in three ways, namely, removing forming, adding/stacking forming, and net/forced forming. The technology of RP_rapidprototyping, which appeared in the late 1980s, belongs to the addition/accumulation molding in object forming. Rapid prototyping technology is a very important kind of modern advanced manufacturing technology. It can quickly respond to market demand in the manufacturing of molds, and is the most significant innovation in the field of manufacturing technology in the past 20 years. Based on the principle of discrete manufacturing,…

（1） Influence of Surface Quality on Wear Resistance of Parts The wear resistance of parts is related to the materials, lubrication and surface quality of friction pairs. The wear process can be divided into three stages. The first stage is called the initial wear stage. At this time, the two surfaces only contact at the top of some peaks. The actual contact area is much smaller than the theoretical contact area, and the peak contact part will generate greater pressure. The rougher the surface, the smaller the actual contact area, and the greater the pressure at the crest, so the…

Common Sense I of Die Casting: Analysis of Damage Causes of Die Casting Die Mold damage analysis: In die casting production, the most common forms of mold damage are cracks and cracks. Stress is the main cause of die damage. Thermal, mechanical, chemical and operational shocks are all sources of stress, including mechanical stress and thermal stress. The stress is generated from: 1. During mold processing and manufacturing 1) Quality problems of blank forging Some molds have cracks after only a few hundred pieces are produced, and the cracks develop rapidly. It is possible that only the external dimensions are…

The full name of bearing steel is rolling bearing steel. It has high compressive strength and fatigue limit, high hardness, high wear resistance and certain toughness, good hardenability, and strict control on sulfur and phosphorus. It is a kind of high-grade and high-quality steel that can be used as cold tool steel. Specific gravity: 7.81 （1） Forging temperature of bearing steel (1) Initial forging temperature: 1150 (1120), final satin temperature: 850 (800) degrees. (2) The surface defects shall be removed before forging, and it shall be heated rapidly after preheating as far as possible. (3) During warm processing, the blue…