readx;? Genius One Second Remember, for you to provide a wonderful novel to read. Pen Fun Pavilion wWw. ｂiquge。 ｉｎfo

ps Yesterday it was a little off.,I'm sorry.,And the bottom of the law should be the detroit.,Sorry to everyone again.,

In fact, sometimes you really can't blame men, sometimes men have physiological reactions because they hold urine, and just when Jin Minghao was in the bathroom, the two fought openly and secretly, and the two began to look at each other, comparing them in terms of figure, face, temperament, and all aspects, and after Jin Minghao solved it, he washed his hands and walked out, "Okay, you two will go to your own room, tomorrow, we will go to the factory." Heather and Gao Enmin were reluctant to leave Kim Myung-ho, especially when the other party was there, but under Kim Myung-ho's gaze, the two of them went out, and Kim Myung-ho could only shake his head helplessly. Kim Myung-ho closed the door, and after closing the door chain, he lay on the bed to rest, hey, hard work. Soon the time came, and at nine o'clock in the morning, Kim Myung-ho slowly opened his eyes. Jin Minghao rubbed his eyes and opened the door, as soon as he opened the door, Jin Minghao was jumped by two people, the two stood together, they were waiting at the door, Jin Minghao was speechless, he simply didn't even eat, Jin Minghao asked Heather to call Pete and make a helicopter to Detrojin.

And why not make an airplane, to be honest, domestic aviation in the United States is really not much better, it is better to go in your own helicopter, at this time Heather has already put on makeup. After calling Pete, the four of them boarded a helicopter and flew to Detroit, where they arrived at the factory just outside of Detroit. After getting off the helicopter, after everyone solved the physiological problems, Jin Minghao did not directly ask Pete to call the representative of the union, but asked Pete to tell him what was going on with car manufacturing, at that time, Jin Minghao only bought Land Rover and Jaguar because cars were easy to make money, Xie Now that he has come to the factory, he naturally has to understand the automobile industry. After Pete immersed himself for a while, he took Kim Myung-ho to a room, and the two of them did it, while Heather and Ko Eun-min began to tour the factory, and then under Pete's narration, Kim Myung-ho learned how the car was made. The production process of automobiles includes the manufacturing of blanks, the machining of parts, the assembly of heat treatment assemblies of blanks and parts, and the assembly of automobile products.

Process refers to the process of changing the shape, size, relative position and properties of the production object to make it a finished or semi-finished product in production. In the process of automobile manufacturing, it includes the process of blank, heat treatment, machining of parts, assembly or components and assembly of automobile products.

The blank manufacturing process manufactures raw materials into castings and forgings through the methods of casting and forging, which are called casting and forging processes, respectively.

Machining process: The process of using cutting tools or other tools on machine tools to process blanks or workpieces into parts using mechanical force.

Assembly process: according to the specified assembly technical requirements, the parts or assemblies are matched and connected to make it a semi-finished product or finished product, which is a part of the process that is completed by a group of workers on a working place and connecting the same or several workpieces at the same time. The small part of the process that is completed by a single clamping process in a single operation. Station: In order to complete a certain process content, after a clamping, the workpiece and the movable part of the machine tool fixture or equipment together with the position of the fixed part of the tool or equipment are changed to the position of the tool or the fixed part of the equipment to complete the part of the process that is completed. The part of the process that is continuously completed on the machined surface, the spindle speed and feed in the cutting tool and the cutting amount remain unchanged.

Methods for obtaining the size of the workpiece: 1 cutting test method, 2 static adjustment method, active and automatic measurement control method In the process of processing,

Method of obtaining the shape of the workpiece: 1. Definition of trajectory method: A method that relies on the movement trajectory of the tool to obtain the desired shape of the workpiece. 2. Forming tool method: the method of using a forming tool to obtain the shape of the workpiece, such as using a thread turning tool to cut the external thread on a lathe 3 envelope method: in the process of relative motion between the tool and the workpiece, the trajectory of the continuous movement of the cutting edge of the tool is enveloped into the shape of the workpiece. There are two types, one is the transient envelope method, also known as the expansion method, and the other is the non-transient envelope method.

The guarantee of the position tolerance of the workpieceThe guarantee of the position tolerance between the surfaces of the machined parts is related to many factors. Including: the manufacturing accuracy of the machine tool, the clamping accuracy of the workpiece on the special machine tool fixture, the manufacturing accuracy of the special machine tool fixture itself and the accuracy of its installation on the machine tool, the accuracy of the cutting tool relative to the tool setting between the special machine tool fixtures, etc.

Processing economic accuracy and surface roughness refer to the tolerance grade and surface roughness that can be guaranteed by a certain processing method under normal production conditions by using equipment, process equipment and workers who use standard technical grades without extending the processing time. Generally, the dimensional tolerance value of the machined surface is small, and the surface roughness value must be smaller, but the surface roughness value required by some machined surfaces is smaller, and the size tolerance value is not necessarily smaller.

Positioning clamping and clamping

Machining: A machining method that uses a metal cutting machine tool to complete the specified size, shape and accuracy requirements of the parts by removing the metal.

Datums are used to determine the points, lines, and surfaces on which the geometric relationships between geometric elements on a production object are based

Process system: In machining, the machine tool, machine tool fixture, tool and workpiece form a complete processing system. Design datum: The datum used on the design drawing. Process Benchmark: The benchmark used in the process

Process datum: The datum used to determine the processing size and position tolerance of the surface to be processed in this process diagram on the process diagram

Positioning datum: A datum that determines the correct position of a workpiece on the machine or in the machine fixture during machining. It is divided into coarse datum and fine datum.

Measurement datum: The datum used to check the dimensional and positional accuracy of the machined surface

Assembly datum: It is used to determine the relative position of the V part or part in the product during assembly

Error recurrence law: the unevenness of the machining allowance and the hardness of the material will cause the change of the cutting force, and the process system will change the size of the deformation due to the difference in the amount of force, which will lead to the error of the size and geometry of the workpiece, and the shape of the processed workpiece is similar to the shape of the blank. This kind of law is called, and the resulting error is called the repeat error.

Due to the deformation of the process system, the error of the blank is partially reflected on the workpiece, which is called "error re-reflection"

The reason for the error repetition law: the shape and size error of the workpiece will cause the change of cutting depth in machining, the change of cutting depth will cause the change of cutting force, the change of cutting force, and the system stiffness is constant, it will cause the change of pressure shift, so that the shape error of the system workpiece is copied.

The machining process specification is a process document that stipulates the manufacturing process and operation method of the parts.

The machining process specification should meet both technical and economic requirements.

The formulation of the process specification includes two parts: drawing up the process route and determining the specific content of each process.

The main process documents are the process process

Machining process

The main functions of machining process regulations: 1. The basis for production preparation and technical preparation before new products are put into production. 2. Organize important technical documents for production and program management. 3. Basis for new or expanded factories.

The division of processing stages: roughing, semi-finishing, finishing

When Pete kept talking to Jin Minghao about the various processes in the automobile industry, Jin Minghao stopped, Nima is too much, and he really can't understand it if he is not a professional.

ps This chapter is to avoid examining the party, don't mind. (To be continued.) Mobile phone users, please browse and read, a better reading experience.