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introduction： The quenching equipment is high pressure and high flow rate real air quenching furnace，Vacuum quenching process。 (1)prequenching：The heat balance method is adopted，Improve the overall consistency of mold heating and cooling。For any thin-walled hole that affects this、groove、cavity，They all have to be filled、Block off，Try to make the mold can be balanced heating and cooling；meanwhile，Pay attention to the furnace loading method，Prevent the deformation of die casting mold caused by its own weight at high temperature。 (2)Heating of die：Heat slowly during the heating process(with200℃／hHeat up)，The two-stage preheating method is adopted，Prevent rapid heating caused inside the mold、outside
2015-01-16 Reading quantity 2821
introduction：In machining，Tapping with a common tap is often encountered，The so-called tapping is to process the internal thread with a tap。It is one of the most widely used internal thread machining methods，For small size internal threads，Tapping is almost the only machining method。Based on several years of work experience，In threading，Methods and precautions for tapping thread、Common problems and causes in the process of tapping、The methods of solving the problem and the common methods of taking out the broken tap are summarized。 1Common tap tapping methods and precautions Methods and precautions for manual tapping with ordinary tap
2015-01-16 Reading quantity 2809
introduction：1.Seal up and prevent rust The rust prevention cycle of mechanical equipment depends on the ambient temperature、humidness、Corrosive ingredients vary，According to our factory machinery and equipment into the warehouse、Deliver goods、Running condition，The mechanical equipment is oiled and packed into the box1-2Years or above。 2. Introduction of anti-rust agent： Mechanical equipment rust treatmentPSA-008Storage type rust inhibitor。The oil film of the antirust agent is thin、Uniform transparency，Strong rust resistance，Suitable for steel、iron、copper、aluminum、galvanize、Long-term oil seals made of various metals such as cadmium plating and its components；The oil has good fluidity，Moderate viscosity，Spray available、leaching、Brush and other methods to seal，For complex structures
2015-01-16 Reading quantity 1475
introduction：Physical properties of stainless steel Comparison of physical properties data of stainless steel and carbon steel，Carbon steel has a slightly higher density than ferritic and martensitic stainless steel，And slightly lower than Austenitic stainless steel；Resistivity according to carbon steel、ferriform、The order of martensitic and austenitic stainless steels increases；The order of the magnitude of the coefficient of linear expansion is similar，Austenitic stainless steel is the highest and carbon steel the smallest；Carbon steel、Ferritic and martensitic stainless steels are magnetic，Austenitic stainless steel is non-magnetic，However, magnetic properties will be generated when it is cold-worked and hardened to form a tensitic phase transition，Heat treatment can be used to remove the martensitic structure and restore its non-magnetic properties。
2015-01-15 Reading quantity 2938
introduction：The structure of electric forklift 1、Drive system The driving system is one of the key components of electric forklift truck。There are great differences in the structure of the drive system of various forklifts，There are also differences in the form of single motor arrangement。Because it is double motor drive，Good acceleration and climbing performance，High traction，Electronic speed adjusting system is adopted，Replace the original mechanical differential system，Usability has been greatly improved。 2、gantry At present，Most of the electric forklifts at home and abroad have adopted wide field of view gantry，The lifting hydraulic cylinder is placed on both sides from the middle。There are two positions for placing the hydraulic cylinder
2015-01-15 Reading quantity 2980
introduction：l)specification These are two different grades of lubricant,inGB 7631.2one87All are lubricants used in a wide temperature range。Both types of oils have low pour points,Excellent wear resistance、Low temperature fluidity and low temperature pumping。HV、HSAccording to the base oil, the lubricant is divided into mineral oil type and synthetic oil type,According to the40。CKinematic viscosity,HⅤOil content15、22、32、46、68、100Six grades，HSOil content15、32、32、46Four brands。 2)use (l)HⅤLow temperature lubricants are mainly used in cold areas or large temperature range and work
2015-01-15 Reading quantity 1595
introduction： The use of four-color printing machine color printed matter belongs to wet printing，Because yellow ink is the most used，If it is the first color, it will be stripped by the second color，Therefore, the yellow ink should be placed in the last color for printing，The amount of black ink is the smallest，It should be printed in the first color。therefore，The color sequence commonly used in Chinas four-color offset press is：black—Sky orchid—magenta—Yellow or black—magenta—Sky orchid—yellow，At this time, the yellow ink must be transparent benzidine yellow。The color order of magenta and blue mainly depends on their respective graphic area，The main color of the picture，Such as：Print with characters in the main（Can be called warm tone）The magenta can be printed after the sky blue，One color sequence before press
2015-01-15 Reading quantity 2815
introduction：An important measure to extend the service life of lubricants is the implementation of a comprehensive lubricant analysis program，By comparing the analysis results with previous analysis reports，The trend of its key wear characteristics can be understood。Such an analysis plan would help to discover the contamination status of the lubricant、Deterioration of lubricating oil、Abnormal machine wear and problems with sampling operations。 1.Learn about developments in the field of machine lubrication Lubrication products and technologies are constantly evolving，So you need to keep up to date。Knowledge of the plants lubrication system by managers and employees is essential to prevent shutdowns、Equipment maintenance、Avoid heavy losses
2015-01-15 Reading quantity 1583
introduction：Numbering and representation of steel ①Chemical components are represented by international symbols for chemical elements and national symbols，Use Arabic letters to indicate the content of ingredients： Such as：China、Russia 12CrNi3A ②A fixed digit number to represent a steel series or number；Such as：America、Japan、300Department of、400Department of、200Department of； ③Use Latin letters and order to form serial numbers，Use only。 Numbering rules of our country ①Use element notation ②use、Chinese pinyin，Open-hearth steel：P、 Rimmed steel：F、 Killed steel：B、A-class steel：A
2015-01-15 Reading quantity 2908
introduction： 1.Use reasonable cooling methods：The influence of the cooling process on the deformation of metal after quenching is also a very important cause of deformation。Hot oil quenching has less deformation than cold oil quenching，Generally controlled in100±20℃。The cooling capacity of the oil is also critical to deformation。The mixing method and speed of quenching affect the deformation。The faster the metal heat treatment cooling speed，The more uneven the cooling，The greater the stress generated，The greater the deformation of the mold。Can ensure the mold hardness requirements under the premise，Use pre-cooling whenever possible；The use of fractional cooling quenching can significantly reduce the heat stress generated during metal quenching
2015-01-15 Reading quantity 1456
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