南京善工信机械有限公司

南京善工信机械有限公司

专业生产设计各类弹簧、汽车制动器销轴、冲压件、尼龙橡胶件、制动器组件、凸轮轴组件的开发和生产
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Nanjing Shan Gongxin Machinery Co., Ltd.

Nanjing Shan Gongxin Machinery Co., Ltd. specializes in the development and production of various springs, automotive brake pins, stamping parts, nylon rubber parts, brake components, and camshaft components.

 

Mainly sold to domestic auto OEMs, North America, Europe, South America and other domestic and foreign markets

 

The company pursues the tenet of "pursuing excellence, satisfying customers with perfect product quality and service", adheres to the business philosophy of "keep improving, people-oriented", continuously learns and innovates, produces high-quality automotive springs, strives to forge ahead, and sincerely welcomes domestic Foreign new and old customers patronize.

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Talking about the influence of heat treatment on the material of crossed roller bearing

Talking about the influence of heat treatment on the material of crossed roller bearing

Crossed roller bearings have excellent rotation accuracy and greatly save installation space. They are widely used in modern precision machinery and equipment. The reason why bearings have good performance is inseparable from the heat treatment process when processing their materials. Finished product usage plays a vital role. The heat treatment of bearing rings is also a key factor affecting production efficiency and finished product quality. Today, the editor will talk to you about the influence of heat treatment on bearing materials. 1. Quenching cracks There are two types of quenching cracks after bearing quenching: deep cracks and surface cracks. Deep cracks are caused by stresses related to temperature gradients; surface cracks are related to surface decarburization. Another reason for cracks is mainly due to the reduction of the brittle fracture strength of the formed martensite due to the higher quenching temperature. Increasing the quenching temperature will reduce the number of quenching cracks; ℃, can make it more stable. If it is taken out from the hot oil and cleaned immediately, it will induce cracks, and even a mixture of a small amount of water entering the quenching oil will significantly increase the risk of cracks; if the intermediate annealing is not sufficient, or the decarburized layer is not removed. Secondary quenching also increases the possibility of cracks. Surface quenching cracks caused by decarburization are largely related to the depth of the tool marks on the surface after machining, which causes stress concentration. The greater the depth of the tool marks before quenching, the longer the cracks after quenching.

Characteristics of common heat treatment furnaces and introduction of refractory materials for masonry

Characteristics of common heat treatment furnaces and introduction of refractory materials for masonry

Heat treatment furnaces are used to treat metals to change the properties and organization of metals so that they have the required physical and mechanical properties. One of the main equipments in the heat treatment workshop of the heat treatment furnace stone metallurgical factory. Due to the diversity of process requirements of the metal to be processed and the differences in thermal systems and temperature systems, there are many types of heat treatment furnaces. Due to the different process requirements of the heat treatment furnace, the temperature range of the furnace is large. Generally, the furnace temperature higher than 650℃ is called high temperature heat treatment furnace; the furnace temperature lower than 650℃ is called low temperature heat treatment furnace. The commonly used refractory materials for masonry heat treatment furnaces are refractory clay bricks and clay heat insulating refractory bricks. At present, fully lined refractory heat treatment furnaces are very common. Common heat treatment furnaces include chamber heat treatment furnaces, car bottom heat treatment furnaces, roller hearth heat treatment furnaces, bell heat treatment furnaces, tower continuous annealing furnaces, pit heat treatment furnaces, chain heat treatment furnaces, etc. 1. Chamber heat treatment furnace Various types of chamber heat treatment furnaces can be used for heat treatment of small and medium-sized parts. Figure 1-25 is a chamber heat treatment furnace with an area of ​​1.59m2, which is used for annealing and quenching of parts. The fuel is coke oven gas. There are two smoke-returning combustion chambers in the lower part of the furnace, each with a burner. The maximum heating temperature of the furnace is 950°C. The main masonry materials required for the furnace: clay drill 12.9t; diatomite brick 1.1t

The latest air-cooled intermediate frequency equipment is used for induction brazing, preheating before welding, and post welding heat treatment

The latest air-cooled intermediate frequency equipment is used for induction brazing, preheating before welding, and post welding heat treatment

Electromagnetic induction heating technology is highly regarded in the field of induction brazing due to its special working principle, high heating efficiency, environmental protection and other advantages. Although not all working conditions and workpieces are suitable for induction brazing, induction brazing can help enterprises Realize fast, controllable, precise, energy-saving and repeatable brazing connections, and the application fields are also expanding. For example, mining machinery, petroleum machinery, railway transportation, wind power machinery, automobile manufacturing and other industries can see induction heating equipment. . However, with the development of the economy, the prices of raw materials in all walks of life are constantly rising, especially metals and steels, resulting in higher and higher prices of induction heating equipment. Therefore, when choosing induction heating equipment, you must choose cost-effective of. If you are familiar with the induction heating equipment industry, you know that Beichen Yike is a company that has been operating for decades, and has been committed to the research of electromagnetic induction heating equipment, especially the newly developed air-cooled intermediate frequency power supply, which is worthy of everyone's attention.

Welding and heat treatment of Q235B steel plate

Welding and heat treatment of Q235B steel plate

Option 1: Welding preheating, er80s-b2l welding wire, T1G backing, e8018-b2 welding rod, electrode arc welding cover, local heat treatment after welding. Option 2: er80s-b2l welding wire, T1G bottom welding, e309mo-16 welding rod, welding rod filling arc welding cover, no heat treatment after welding. 2 Preparation before welding The welding method of the test piece using the Q235B steel plate 1 welding material is based on the weldability of the Q235B steel plate and the working characteristics of the high-pressure pipeline on site. The specification is φ32525 Before welding, use an angle grinder to polish the inside and outside of the groove and the edge of the groove within 50mm to reveal the metallic luster, and then clean it with acetone. The specimen is in a horizontal fixed position with a butt gap of 4 mm. Six points should be spot welded evenly around the circumference by manual TIG welding. The fixed length of each point of the Q235B steel plate shall not be less than 20mm. Electrode model baking temperature and holding time e8018-b2300℃2he309mo-16150℃1.5h3 Welding process parameters According to the calculation formula of preheating temperature, it should be preheated according to scheme 1 before welding: to=350√ [C] -0.25℃; formula , to the preheating temperature, °C.

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