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China Automotive Stamping Die Technology Development Analysis

 

Editor's note: Stamping is a process, one of the four vehicle manufacturers, body depends largely on the manufacture of precision stamping and assembly accuracy. Stamping process from the development of mass production and needs, in particular the development of the automotive industry, and now remains the same.

1, automotive stamping Technology Development Status

Technological development of China's automotive stamping the status quo in the following aspects.

1. Outer covering parts higher degree of automation

Outer covering parts of the surface of high quality requirements can only rely on automation. China's motor vehicles, covering parts of the automated production, while not high-speed stamping, but the degree of automation is high. This is mainly manifested in the widespread adoption of automation into a line of stamping area.

Into a line of stamping presses range from 4 units to form a complete closure of punch lines, the middle robot automatic feed and pick-up, production is about 10 ~ 15 beats / min, typically is the first dual-action 1630T and follow-up of the 800T press formed.

2. Floor, roof covering parts within the category of automatic or semi-automated production

Mainly by the volume of these parts to determine its mode of production, the general use of automation or semi-automated production. In addition to joint-venture companies, local enterprises are basically starting with the first semi-automatic stamping of production.

Semi-automatic stamping presses made on the specific requirements. First of all, press the table should be large; Secondly, since forming force is too large, the need for the 2000T's first press, or 2400T, follow-up press for the 1000T or 1250T and above.

3. Chassis frame-piece Multi-parts enterprises from the manufacturing

Many pieces of the chassis frame components manufactured by the concurrent to the OEMs. Into the size of the parts companies generally have six punch lines, taking into account the ease of quality control and OEM production logistics management, these companies have welded parts and even the follow-up the paint or spray process, and thus able to directly provide OEMs a total into parts.

4. Precision stamping technology is developing rapidly

Precision stamping technology, along with the development of manufacturing watches and clocks originated in Switzerland, is the automotive industry in the development of key technologies, one of a number of assemblies in the automotive manufacturing has important applications, such as door hinge assembly, such as glass lift assy. Such parts material thickness 3-5mm, require spare parts, high precision, high strength, smooth and reliable assembly moves.

After years of development, precision stamping technology in China's automobile industry has made encouraging achievements, the current number of China's emerging strength of the fine blanking company.

Typical Enterprise: Dongfeng Mold Chong

Simple mold industry is a technology-intensive, capital-intensive, labor-intensive industries, large investment and long payback period, it is difficult to rapidly expand in simple punching is relatively easy to big business but the lack of core technical support. Dongfeng Mold Stamping Technology Co., Ltd. by big business to support the stamping die faster development of business to achieve die, stamping interaction, mutual promotion.

Dongfeng Mold Chong is the integration of the original three companies owned Dongfeng die and punch set up welding manufacturing resources, scope of business has changed from a single product expansion for the current mold, stamping, welding integrated products that can provide different for different users products and wider range of services. Company's total assets over one billion, nearly 2,000 employees in 2008 sales revenue 740 million yuan.

At present, the "digital manufacturing" has to cover the company's full-mold design and manufacturing process chain, PDM technology applications to achieve the whole process of collaborative management. Overall, the wind die Chong already have an annual development, design, manufacture 1.5 Vehicle body assembly tooling and stamping and welding overall strength is to serve an important force in China's automobile industry.

Second, automotive stamping technology, problems in the development

1, the mainstream of the current domestic die stamping process or a linear production model, as special forming process, such as hydroforming, we often hear a similar presentation and report, but mainly stays in the laboratory condition.

2, hydraulic forming technology industry, mainly used in tube fittings forming abroad are mainly used in very small quantities of personalized automobile parts manufacturing. The current panel forming, the domestic has no application.

Hydroforming has a more prominent advantages: First, from the principles of speaking, the technology is equal pressure forming, rely on high-pressure media to change the shape of sheet metal, sheet metal in France to be under pressure for the three-force status, can be better improvement of local shape, or that is conducive to forming a more complex panel; secondly, its forming principle and liquid medium, has changed the traditional steel - steel contact forming method can effectively reduce the scratch sheet, to improve the surface quality is extremely beneficial to ; and third, to improve the traditional stamping stamping right direction constraints; fourth, one may be forming more technology content, which will help to reduce the number of processes and mold; fifth, forming the cold-hardening help improve the strength of workpieces. Meanwhile, the foreign application from the current situation, its production does not slow tempo. However, hydraulic forming technique is also inadequate. Limits its application is obvious: the need for external liquid medium and its corresponding device; and the need to weld the part before the follow-up treatment; take into account the environmental impact of on-site operations, is not suitable for high-volume parts machining.

3, auto cover mold problems

Auto cover both internal and external of the other, with a corresponding inside and outside the coverage of mold are also divided. The surface quality of parts inside the cover mainly resilience and distortion problems, mold is stable and reliable is to prevent injury and improve the workpiece warpage and deformation; outer covering parts of the surface quality is mainly scratches, holes and edges of the burr, Local depression, laminate surface forming quality, assembly parts assembled in space and other issues, mold requested the working part of the production well, the assembly precision and smooth movements such as mold. Mold Network CEO, Shenzhen mold expert members of the Romanian Institute of Technology 100-hui, China has been fully equipped to create a complete mid-size car body molds capacity and technology, but mold is not a mass production, regardless of any set of molds from Which Mold Factory manufacturing, the final or by the specific commitment to its design and manufacture of specific personnel to complete the task. We can accumulate and standardization of the overall experience a lot of work, but because a single piece of production, so in fact or by the individual level decision. LAW 100-hui said that the current vehicle plant in China within the coverage of mold completed mainly by domestic production, while some outside the coverage of the key mold to take to outsourcing. Outsourcing is based on the experience of foreign countries is more abundant, party awarding the quality of the product life cycle and have greater expectations. Outsourcing production of the mold is also a matter of fact there are many problems, but the party issuing the contract terms, from the psychological would think that more domestic issues.

All in all, automotive panel dimensions large, into line with production methods, the use of molds into the line; small and medium sized stampings more widespread use of foreign multi-position progressive die, high efficiency. With the continuous development of the domestic automobile industry, China's automobile mold industry has been steadily progressing, foreign auto mold factory will also be a competitive advantage have been weakening, in the end will be increasingly recognized domestic molds.

4, automotive stamping die design looking forward to improve the CAD / CAE system integration technology

Currently on the market general-purpose CAD / CAE system, compared with 10 years ago, has been great changes in the past, are more generalized system for mold manufacturing are currently made a lot of adaptability of the actual development or conversion, this is undoubtedly a huge progress.

Now on the market a number of typical CAD / CAE system function is very powerful, but in practical applications, due to changes in the environment is always difficult to achieve the desired results, or where there is a little unsatisfactory. In the long run, from the lower cost and service point of view, if it made a powerful CAD / CAM system is better. LAW 100-hui, CAD / CAE integration will be a need or trend, in fact, now there are many such attempts, but look at application effect is not yet very satisfactory. CAD / CAE system developers need to cover the mold design ideas to make some sort of special detail, analysis and features of treatment, and then from the point of the software system to find a point. In this regard, to do more remarkable is the Thinkdesign system, the system can achieve a good rebound handling engineer's intentions.

The integration between software systems are always constantly move forward, the physical address on the network has no problem, and now a number of mold factory has been achieved under the PDM environment, CAD / CAM integration. But the system development and mold factory industrial applications of this relationship is the point of view, there is no more mature industrial applications, there is no experience to be shared, mold factory to be applied on the need to invest, and investment revenues needed. At the same time, the training of personnel is also an unavoidable issue.

5, automotive stamping die manufacturer of machine tools and tool requirements

A. equipment requirements of machine tools

Automotive stamping mold manufacturing equipment requirements, mainly reflected in the stability and reliability.

The equipment is now increasingly dependent on equipment installation staff skills and professionalism, equipment installation personnel must take the equipment installed, commissioning to the best state, in the training of the operators when equipment must be stressed that the use and maintenance of the main points and What it brings results. Mold manufacturing enterprises to spend huge amounts of money to buy equipment, high expectations, which requires all parties to work to achieve its intended goals and achieving win-win situation and harmony. If the equipment manufacturers to pay a return visit on a regular basis users and on-site service, and even some major repairs and rehabilitation services, and so on, will prosper.

B. the requirements of the tool

The tool requirements, mainly in the following points:

① quality. Quality is the prerequisite, but also the quality requirement is never-ending. Total life and a life of grinding is its measure.

② price. The more fully competitive field, the role of prices becomes greater. Cost-effective is its measure.

③R & D capabilities. The introduction of new capacity to contain at least two aspects: First, ability to respond to customer needs, the user afraid to ignore their needs cutting tool supplier, such as the products needed by customers temporarily suppliers are strongly recommended, customers are looking for but the delay in I offer solutions, it is confusing. But now have been greatly improved in this respect, we have seen a number of sophisticated targeted solutions; second is the design of new manufacturing capacity, which is a supplier of technology, manufacturing strength test.

Of course, not all the requirements of customers are reasonable or feasible, but the suppliers (including our own, as someone else's suppliers) is indeed an obligation to carefully analyze the client's needs and based on the existing level of technology to provide customers with professional solutions. Therefore, based on the existing level of technology can provide customers with a professional or targeted technology solutions provider has become the test of R & D capabilities of a very important and very real aspects.
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