Abstract: Aiming at the oil storage and transportation process, as the high-pressure pipe were analyzed in the study by Wang hammering of the production process, and the design of new fixture into traditional processing into and increase efficiency.
In the process of oil extraction and storage, as oil pipelines in important fittings hammer union has an extremely important role in the structure of the complex (Figure 1), the material is difficult machining applications in the high-pressure oil pipelines in part on the strength, precision and high sealing requirements, the use of modern CNC machining technology to make manufacturing union hammering, hammering developed under CNC machining conditions by the manufacturing process and equipment design and manufacture of parts Wang method bring innovative ideas into the traditional production process is important.

Figure 1 hammer union Chart
NC programming process analysis is the process of preliminary preparation work, whether manual or automatic programming programming, the programming is required prior to the processing of parts for process analysis. If ill-considered process analysis, process design often result in unreasonable, causing repeated programming workload doubled, sometimes reinvent the wheel phenomenon, causing some unnecessary losses, serious or even cause CNC machining errors. Give full play to the function and potential of CNC machine tools, reduce labor intensity of workers, improve processing efficiency, improve product quality, extend the service life of the machine, the original process improvement study.
1.Analysis of the current process hammer union status
Traditional process (see Table 1): roughing, quenching, sandblasting, magnetic particle inspection, fine cars hole, fine cars trapezoidal thread, trapezoidal thread milling headend 1/3 residual buckle.
Table 1, the contents of the existing union process steps

In step 70, using the ordinary three-jaw chuck platen presses CNC milling machine table, to clamp the workpiece, blessing disadvantage of this approach are: greater impact of human factors, relying on operator proficiency to ensure production efficiency and product quality.
2.Hammer union New technology research process on the basis of existing
In line with the basic principles of the existing machinery manufacturing process technology "base first, coarse and fine after the first, after the first surface of the hole, after the first primary times' However for the continuous improvement of product quality and economic efficiency requirements, used for many years in the production process should be improvements. fixture is an important part of the process equipment, is one of the most active factor in the process, and the direct impact on the quality of the product, production efficiency and processing costs. in the current process, the jig is used jaw chuck, three-jaw chuck and there are many limitations when applied to the vertical milling machine.
In the beginning of the trapezoidal thread milling residue 1/3 deduction procedure used in this device is a vertical milling machine, jig is a traditional three-jaw chuck. First, the three-jaw chuck is fixed in a vertical milling machine table, the operator on the workpiece chuck, circumferential rotation, alignment with the visual method, so trapezoidal thread starting reference point is aligned with the chuck, then Folder tight to begin processing. Complete the processing time is about 210 a 260 s (see Table 2).
Table 2 traditional process each time analysis process

According to the above analysis, the process being used there is room for improvement. Change the traditional machining thinking is the key, although three-jaw chuck is widely used in traditional fixture, but invested in special fixtures used in the process is very important. Therefore proposed to use special fixtures.
Hammer union special fixture (Figure 2) design requirements: to ensure processing requirements, improve production efficiency. So the idea is not only to ensure accuracy and reducing the operator's manual.

Figure 2 Schematic fixture
According to the characteristics of the workpiece, the clamp body is designed as two separate upper and lower portions, the lower half of the T-bolts and nuts mounted to the table, the upper and lower portions connected by a buttress thread. When clamping the workpiece, the workpiece according to the location of the installation shown in FIG. 3, the circumferential direction of the workpiece uniformly distributed on the three projecting portions of the jig to the upper part of the corresponding recess placed, and then, clockwise rotating jig, clamping the workpiece . This will not only quickly workholding, but accurate positioning.

Figure 3 piece installation diagram
3.Hammer union prospect of new technology in the production of application analysis
The introduction of new production technology, tool cutting workpiece time-invariant, loading and unloading time of a job have significantly reduced the analysis to estimate: the traditional production process per average time of 210 - 220 s, using new technology fixtures reduce 40 ~ 60 s average time per piece , average cost per production can be reduced 22.7% with a 23.8%, the efficiency of a 31% increase 29%.
4.Conclusion
The introduction of new production technology, change the traditional production and processing ideas, productivity increased by 29% a 31%, operator expenditure on wages Pingjunmeijian reduced by 20%. Therefore, the application of new production processes not only increase productivity, reduce costs, people can bring new ideas in the traditional production concepts, the innovative ideas integrated into the traditional production process is critical.