Production line Problems existing in China's automobile welding production line

Production line China's auto industry product independent development capability is very weak, lagging behind developed countries by 20 years, especially the car research and development capability is weaker, so there is less research on sharing technology platforms between products. Welding is one of the four major processes of automobile production. Its technology and automation level play a vital role in automobile production. At present, the level of domestic welding lines in my country is uneven, which affects the rapid development of automobiles. Keywords: Technology Platform Welding Automation Lack of a common technology platform. The production life of each model will be gradually shortened with the intensification of business wars. The phenomenon that a model is produced for 7-8 years is gone forever, and the sales price of cars will gradually decrease, especially with a wide range of vehicles. For cars in the market space, the profit per car will gradually decrease and approach the world level. The general market trend objectively requires automobile manufacturers to establish a shared technology platform between products, and continuously introduce new bodywork with the least investment to meet the needs of users at all levels, and realize the lower support of all passenger car models with the same position and size. point, to reach the universality of skid and spreader. Through the platform strategy, different models share the same lower part of the body, and the number of stamping parts and welding workload account for a relatively high proportion of the whole vehicle. This reduces the investment in new vehicles.

      Blind pursuit of automation, my country has a large population, low labor costs, and a large amount of surplus labor. There is a certain distance between the industrial base and developed countries, and the quality of many vital parts cannot meet the requirements of automation. This is our national condition. In countries with developed automobile manufacturing industry, the price of labor is high, and the number of employees in each factory is strictly controlled. Comparing the cost of robots and humans, the use of robots will save some, which is the main factor in foreign automation. Hyundai Automobile Factory in Ulsan, South Korea One of the welding workshops is an unmanned workshop, which is fully automated. The senior leaders of some domestic auto factories visited some large auto groups abroad, and most of them demanded that the welding production line should be improved, the degree of automation and the number of robots should be increased, and they blindly learned from the automobiles of developed countries. The result of blind pursuit of automation is to spend a lot of foreign exchange to introduce production lines, and at the same time put forward higher requirements for the maintenance and maintenance of production lines, which increases the difficulty of maintenance. Therefore, my country's current national conditions determine that a large number of robots should not be used in welding production lines, but it is necessary to select robots for welding points and arc welding where the labor intensity of workers is high, manual operation is not easy to be in place, and welding quality is difficult to guarantee. Production line In the production line operation, the production line balance directly restricts the improvement of production efficiency and the quality of the product. In the process of production line configuration, it also depends on the production line balance. Let's take a look at the production line configuration based on the production line balance.

1. First of all, we must know the three basic concepts of production line balance:

a. Production takt: The takt is usually just used to define the unit output time of a specific process or link in a process. b. Basic production unit

c. Production line efficiency.

Second, the steps of the production line balance:

a. Use a flow chart to show the sequence of basic actions. The flow chart consists of circles and arrows. The circles represent a basic unit of work, and the arrows represent the sequence of tasks.

b. Calculate the production takt according to the output

c. Use the formula to calculate the required number of stations, the formula is: number of stations = total effective time divided by production takt

d. Assign basic work units to a workstation

e. Calculate the efficiency and evaluate the effect of the balance of the production line.

f. If not satisfied, further adjust the balance of the production line.

3. Production line configuration: linear and u-shaped

Among them, the main advantages of the U-shape are: providing more possibilities for the balance of the production line, returning to the starting point with the pallets and fixtures of the flowing products in the production line, reducing handling, one person performing multiple operation rooms, and reducing the movement of personnel , without arranging different people to input materials and collect finished products, the logistics green line is smoother.