机械理论（Mechanical theory）.docVIP

机械理论（Mechanical theory） 1. The finishing edge of the boring tool can reduce the residual area height of the machining surface, so the longer the finishing blade, the better the light effect. (wrong) 2. In the production process, the selection of the fixture should first consider whether the machine can be used with the universal fixture and accessories. (to) 3. Before boring internal threads, determine the size of internal thread hole. (to) The larger the pitch, the larger the thread Angle. (wrong) The size of the outside thread is the same as the basic size and the use of the size you are in. (wrong) 6. The maximum impact of boring speed on tool life. (to) 7. Boring with boring tool can correct all kinds of deviation caused by drilling and reaming. (to) When boring and boring with carbide tool head, low cutting speed and large quantity of feed, good hole shape precision and fine roughness are obtained. (wrong) 9. In the process of production, collision, demagnetization, dynamic balance, packing and other contents should not be included in the process of machining process. (wrong) 10. Measuring force is the contact pressure between the measuring head and the surface of the measured object in contact measurement engineering. (to) 11. The outer ring of rolling bearing is the machine shaft system. (to) 12. With precision and precision, all positioning accuracy has been used in conjunction with the above. (X) 13. No process card is required for numerical control processing. (X) Using local coordinate system, the programmer can reduce some computation work and make programming easy. (Y) 15. When using user macro program, because can use variables instead of specific values, and in the same class of workpieces, just put the actual values assigned to variables, without the need for every parts make up a program. (Y) The plane Settings in the processing program are available G17, G18, G19. (Y) 17. The numerical control machine tool can be divided into: economic type, all-pu