Machining process machining general principles Machining process planning, generally can be divided into two steps. The first is to develop parts processing route, and then determine the size of each process steps, equipment and process equipment and cutting norms, working hours and so on. These two steps are interrelated and should be analyzed comprehensively.
Process route is to develop the overall layout of the process, the main task is to select the surface of the processing methods to determine the processing sequence of the various surfaces, as well as the number of processes throughout the process and so on.
The general principle of the formulation process route
First processing datum
Parts in the process of processing, as the positioning of the surface should be the first to be processed in order to provide follow-up process as soon as possible to provide accurate benchmarks. Called the "benchmark first."
Divided processing stage
High-quality processing requirements of the surface, are divided processing stage, generally can be divided into roughing, semi-finishing and finishing three stages. Mainly to ensure the quality of processing; is conducive to the rational use of equipment; easy to arrange heat treatment processes; and to facilitate the discovery of rough defects.
First back hole
For the box, bracket and connecting rod and other parts should be machined plane after processing holes. This makes it possible to position the holes in a plane, to ensure the positional accuracy of the plane and the holes, and to facilitate the machining of the holes in the plane.
After finishing the workpiece
The main surface of the finishing (such as grinding, honing, grinding, rolling, etc.) should be placed in the final stage of the process line, the surface finish after processing Ra0.8um above, minor collisions will damage the surface in Japan , Germany and other countries in the finishing, should be protected with flannel, must not be allowed to use your hand or other objects directly contact with the workpiece, so as not to finishing the surface, due to transport and installation process between the damage.
The above process for the general arrangements. Some specific circumstances can be handled according to the following principles.
(1) In order to ensure machining accuracy, rough, finishing the best separately. Because roughing, the amount of cutting, the cutting force suffered by the workpiece, clamping force, heat and more, and the processing of the surface there is more significant work hardening phenomenon, the workpiece there is a large internal stress, if the rough, thick Continuous processing, the accuracy of parts after finishing because of the stress redistribution and soon lost. For some high precision machining parts. After roughing and finishing, cryogenic annealing or aging treatments should also be arranged to eliminate the internal stresses.
(2) Reasonable use of equipment. Rough cutting is to cut off most of the machining allowance, does not require a higher machining accuracy, so the roughing should be larger, less accurate machine tool, finishing process requires a higher precision Machine tool processing. Coarse, finishing in different machine tools were processed, both to give full play to equipment capabilities, but also extend the life of precision machine tools.
(3) In the machining process route, often arranged heat treatment process. Heat treatment process positions are as follows: In order to improve the metal cutting performance, such as annealing, normalizing, quenching and tempering, generally arranged before machining. In order to eliminate internal stress, such as aging, quenching and processing, generally arranged after roughing, finishing before. In order to improve the mechanical properties of parts, such as carburizing, quenching, tempering, etc., generally arranged after machining. If the heat treatment after a larger deformation, the final processing must be arranged.
Kunshan City, Pakistani town Fulong mechanical processing plant was established in July 2004, mainly engaged in machinery parts processing and manufacturing. Now has a variety of advanced processing equipment at home and abroad, such as imports of four-axis machining center, milling complex machining centers, MAZAK precision CNC lathes, high-speed CNC, precision grinding machines and wire cutting, EDM. At the same time with a variety of advanced measuring equipment such as three yuan testing, automatic imagers, all kinds of special pneumatic measuring tools.
Based on the business philosophy of "Standard management abides by honesty, pursuing excellence and pragmatic innovation", Fulong Machinery is committed to developing long-term business relationship with its customers and continuously providing customers with cost-effective products and services.