【文章內(nèi)容簡介】 coordinate values set by the memory, reset back to zero run is no longer working, will need to rerun the tool and reset to XαZβ location G50. If it is production, processing, after the End of a return to the starting point for continued processing under the G50 is, in the process some errors on the work piece coordinate system may be modified. In view of the first sentence of the above procedures using G50 work piece coordinate system set up many defects, I will want to approach the work piece coordinate system fixed on the machine will process the first sentence changed to G50 XαZβ after G00 Xα Zβ, problem solved. The course of its operation only to find G50 using the abovementioned fivestep process before, that is, 1,2,3,4,5 steps to achieve, it will run the tool to a safe location, out of process, and can run automatically. Even if power outages and other unforeseen circumstances occur, restart the system, in the Edit mode to move the cursor without affecting the safe processing of the work piece processing process program segment, according to automate the processing can continue. First sentence of the above procedure to replace G50 with G00 is the substance of the work piece coordinate system fixed on the machine, no longer limited to the origin G50 Xα Zβ process constraints, without changing the work piece coordinate system, easy operation, reliability, and received an unexpected effect. Chinese metal processing online Second, control of dimensional accuracy skills 1. To amend the value of a knife up to ensure dimensional accuracy First on the knife because of error or other causes beyond the work piece work piece error tolerance, can not meet the processing requirements, can be added by modifying the knife so that the work piece size to meet the requirement to ensure that the radial dimensions are as follows: a. absolute coordinate input method According to the big decrease, a small increase principle, a knife up at 001 ~ 004 modified. Such as cut off on the 2nd slot at a big size work piece , and 002 showed up knives are , may enter the , to reduce the knife on the 2nd meeting. b. the relative coordinate method as in the previous case, enter 002 knife fill , also the same result. Similarly, the axial size of the control also and so on. Such as cylindrical with a knife on the 1st axis somewhere above processing, size, long , can be pleted at 001 knife enter . 2. Semifinishing to ensure that the impact of the elimination of screw gap dimensional accuracy For the majority of CNC lathe using a longer time, because of the effects of screw space and processing of the work piece dimensions are often unstable situation. At this time, we can rough after finishing a halfspace to 機(jī)械專業(yè)中英文文獻(xiàn)翻譯 eliminate the effects of screw. 1, such as a knife with G71 cylindrical rough, you can fill in the 001 knife enter , call the G70 a fine car, parking measurements, and then fill in the 001 knife enter , once again calling a G70 Finish . Finish a half after this time, eliminating the effects of screw clearance to ensure the stability of the dimensional accuracy. 3. To ensure dimensional accuracy Programmer a. to ensure dimensional accuracy absolute programming there is an absolute and relative programming. Programming refers to the relative curve in the processing, the location of the end of the line segment to the starting point for the coordinates of the segment and to determine the origin of the coordinate system. In other words, programming is relatively often at the origin of the coordinates transform, continuous displacement is bound to result in a cumulative error, the absolute programming are in the processing of the whole process, have a relatively unified reference point, that is, coordinates of the origin, so the accumulated error over the relative Programming small. CNC turning work piece, the work piece precision radial dimension than the axial size of the general high precision, it is in the preparation of procedures, the use of the radial size of the absolute best programming, taking into account the processing and the convenience of programming, often used sizes of axial relative programming, but the essential axial size, the use of the absolute best programming. b. to ensure dimensional accuracy numerical conversion A lot of cases, the pattern on the size of the baseline and benchmark the size of the required programming inconsistent and should be first on the base pattern size coordinates converted to programming in size. Figure 2b, in addition to size of , the rest is marked directly by Figure 2a and size to be converted by the program size. One of, , φ16mm and the three dimensions of respectively limit the size of two average size after the programming. 4. Modify the program and control the size of premium knives CNC Machining, we often encounter such a situation: the procedure to run automatically after stopping measurement and found that fail work piece size, size irregular Change. Such as a knife with 1 cylindrical work piece processing as shown in Figure 3, the postroughing and semifinishing parking measurements, the size of the radial axis paragraph as follows: , and . In this connection, I used a knife to amend the procedures and methods make up the remedy, as follows: a. modify the program X30 original program unchanged, X23 changed , X16 changed , As a result, are in excess of the shaft above the name of tolerance uniform size 。 b. knife to fill Knife on the 1st at 001 imported premium . After these procedures and a twopronged knife revised up, and then call the refined procedures, the general size of the work piece can be effectively guaranteed. CNC Turning CNC program is based on automated processing, the actual processing, and the operator only has a strong ability to use the program instructions and a wealth of practical skills i