The manual winch is a machine with a winch drum installed vertically, which can wind but not store ropes under power drive. The hand winch also refers to the winch whose rotation axis is perpendicular to the deck. It is a self-protection and traction device for vehicles and ships. It can carry out self rescue and rescue in harsh environments such as snow, swamp, desert, beach and muddy mountain roads, and remove obstacles and under other conditions dragging goods and installing facilities are indispensable safety devices for military and police, petroleum, hydrology, environmental protection, forestry, transportation, public security, border defense, fire control and other outdoor sports.
The traction force of the manual hand winch is set in pounds and can be converted into tons or kilograms through conversion. It is best to choose a winch with a high number of pounds, because the weight of the trapped vehicle is often much higher than the daily vehicle weight. Do not tow objects that exceed the winch's traction.
The more turns the steel cable of the hand winch is wound on the reel, the smaller the tension of the outer ring. The portable hand winch with long reel can reduce the number of turns to increase the traction of the outer ring. For the same winch, the outer ring traction force of shorter steel cable is greater than that of longer steel cable.
Hand Winch,Manual Winch,Portable Hand Winch,Manual Hand Winch Taizhou Haoxin Electric Power Machine Co., Ltd. , https://www.hxstringingequipments.com
The mold is the basic process equipment of the automobile industry. More than 90% of parts and components in automobile production rely on mold forming. About 1500 sets of molds are needed to make an ordinary car, and about 1,000 sets of stamping dies are used. In the development of new models, 90% of the workload is based on changes in the body profile of the new model development costs, about 60% for the body and stamping process and equipment development. About 40% of the vehicle manufacturing cost is the cost of the body stamping and its assembly.
In the development of the automotive mold industry at home and abroad, mold technology presents the following development trends.
First, the three-dimensional design status of the mold can be consolidated Three-dimensional design of the mold is an important part of the digital mold technology, to achieve the integration of mold design, manufacturing and inspection basis. Toyota, U.S. General Motors and other companies have achieved three-dimensional design of molds and achieved good results. Some practices taken abroad in the three-dimensional design of molds are worth learning from. In addition to facilitating the realization of integrated manufacturing, the three-dimensional design of the mold has another advantage that it is convenient for interference checking and can perform motion interference analysis, solving a problem in two-dimensional design.
Second, the simulation of the stamping process (CA E) has become more prominent In recent years, with the rapid development of computer software and hardware, the simulation technology (CA E) of the stamping process has played an increasingly important role. In developed countries such as USA, Japan and Germany, CA E technology has become a necessary part of the mold design and manufacturing process. It is widely used to predict molding defects, optimize the stamping process and mold structure, improve the reliability of mold design, and reduce the test time. Many domestic auto mold enterprises have also made significant progress in CA E applications and have achieved good results. The application of CA E technology can greatly save the cost of trial moulds and shorten the development cycle of stamping moulds. It has become an important means to ensure the quality of moulds. CA E technology is gradually changing the mold design from experience design to scientific design.
Third, digital mold technology has become the mainstream of the rapid development of digital mold technology in recent years to solve the many problems in the automotive mold development is an effective way. The so-called digital mold technology is the application of computer technology or computer-aided technology (CA X) mold design and manufacturing process. Summarizes the successful experience of computer-aided technology applied by domestic and foreign automotive mold companies. The digital automotive mold technology mainly includes the following aspects: 1 Design for manufacturability (DFM) is to consider and analyze manufacturability during design and ensure the success of the process. 2 Assist technology for mold surface design, development of intelligent surface design technology. 3CA E assists in the analysis and simulation of the press forming process, predicting and resolving possible defects and forming problems. 4 Replace traditional 2D designs with 3D mold design. 5 Mold manufacturing process using CA PPCA M and CA T technology. 6 Deal with the problems that arise in the trial moulding process and stamping production under the guidance of digital technology.
Fourth, rapid development of mold processing advanced processing technology and equipment is an important basis for improving productivity and ensuring product quality. It is not uncommon for advanced automotive mold companies to use CNC machine tools with dual-tables, automatic machining systems for automatic tool changer (ATC), and on-line measurement systems for workpieces. CNC machining has evolved from simple profile machining to full-scale machining of surface and structural surfaces, from low-to-middle-speed machining to high-speed machining, and processing automation technology has developed rapidly.
Fifth, high-strength steel stamping technology is the future direction of development High-strength steel due to the yield strength ratio, strain hardening characteristics, strain distribution capacity and collision energy absorption, etc. have excellent characteristics, the use of the car continues to increase. At present, the high-strength steels used in automotive stampings include paint-hardened steel (BH steel), dual phase steel (DP steel), phase change induced plasticity steel (PIP steel), and the like. ULSA B projects that 97% of ULSA BAVC's advanced concept vehicles will be high-strength steel in 2010. The proportion of advanced high-strength steel plates in the vehicle will exceed 60%, of which dual-phase steel The proportion will account for 74% of the car steel plate
Nowadays, a large number of mild steel series, mainly IF steels, will be replaced by high-strength steel plate series, and high-strength low-alloy steels will be replaced by dual-phase steels and ultra-high-strength steel plates. At present, the application of high-strength steel plates for domestic auto parts is still limited to structural parts and beam parts, and the tensile strength of the materials used is mostly below 500 MPa. Therefore, to quickly grasp the high-strength steel stamping technology, the country's auto mold industry an urgent problem to be solved.
Sixth, the new mold products launched at the right time With the development of automotive stamping production efficiency and automation, progressive die in the production of automotive stamping parts will be more widely used. The complex shape stamping parts, especially the small and medium-sized complicated stamping parts which need to be punched in the order of many pairs of punches in the conventional process, are more and more adopting progressive die forming. Progressive die is a high-tech die product, which has great technical difficulty, high manufacturing precision, and long production cycle. Multi-position progressive die will be one of the key development products of the country.
Seven, mold material and surface treatment technology will be subject to re-use mold material quality and performance is an important factor affecting mold quality, life and cost. In recent years, in addition to the continuous availability of many high-toughness and high-abrasion cold work die steels, flame quenching cold work die steels, and powder metallurgy cold work die steels, foreign countries have used cast iron materials in large and medium-sized punching dies. The development trend. Ductile iron has good toughness and wear resistance, its welding performance, processability, surface quenching performance are also better, and the cost is lower than the alloy cast iron, so more applications in the automotive stamping die.
VIII. Scientific and informational management is the development direction of mold enterprises Another important aspect of the development of automotive mold technology is the scientific and informatization of management. The scientization of management has enabled mold companies to continue to develop in the direction of Just-in-Time Manufacturing and Lean Product. Enterprise management is more accurate, production efficiency has increased dramatically, and ineffective institutions, processes, and personnel have continued to be streamlined. With the development of modern management technology, many advanced information management tools, including enterprise resource management system (ERP), customer relationship management (CRM) supply chain management (SCM) project management (PM), etc., mold enterprises have been widely used.
Nine, the refinement of mold manufacturing is an inevitable trend of the so-called mold fine manufacturing, the mold development process and manufacturing results in terms of the specific performance of the stamping process and mold structure design rationalization, high precision mold processing, mold products High reliability and technical management rigor. In fact, mold fine manufacturing is not a single technology, and it is a comprehensive reflection of design, processing, and management technology. In addition to technological excellence, the realization of the refinement of mold manufacturing must be ensured by strict management.
The mold is the basic process equipment of the automobile industry. More than 90% of parts and components in automobile production rely on mold forming. About 1500 sets of molds are needed to make an ordinary car, and about 1,000 punching dies are used...