High precisionMilling combination machine tool

High precision milling combination machine tool

High precision milling combination machine toolStructural characteristics
1. Long hole boring, represented by the coaxial hole system of box parts, is one of the important contents in metal cutting. Although there are still examples of using boring molds, guide sleeves, desktop milling and boring machines to support long boring bars on the rear columns, or manually aligning workpieces to rotate 180 ° for long hole boring, in recent years, on the one hand, due to the widespread use of CNC milling and boring machines and machining centers, the positioning accuracy of various horizontal milling and boring machines and the indexing accuracy of worktable rotation have been greatly improved. Long hole boring has gradually been efficiently carried out by turning the worktable 180 ° for self positioning. On the other hand, with the widespread production and application of ordinary or CNC milling and boring machines with bed layouts, turning the worktable 180 ° for self positioning has almost become the method of boring long holes on this type of machine tool.
2. The coaxiality error and compensation of the column feeding into the turning hole
The main factors affecting the coaxiality of the turning and boring of milling and boring machines are the same as those of desktop milling and boring machines, which are the indexing error da of the worktable turning 180 ° and the positioning error dx2 required for the worktable to move laterally (x) Lx=2lx in order to make the axis of the half long hole d1 that was already bored before turning coincide with the axis of the boring shaft again after turning and boring the other half of the long hole d2. Moreover, when the worktable rotates 180 °, the inclination error df generated in the xy coordinate plane, the inclination error dy generated in the yz plane, and the translation error dy generated in the y direction are also important factors affecting the coaxiality of the turning and boring holes in the planer milling and boring machine. However, the influence of the spatial position of the boring axis on the coaxiality of the turning boring hole is significantly different from that of the boring machine with a worktable that is usually longitudinally moved by a worktable and fed into the boring machine with a planer and boring machine that is usually fed into the column to complete the full length boring of the hole.
3. Reasonable determination of the longitudinal position of the column during boring shaft feeding
When encountering specific situations, the milling and boring machine must fix the column in a suitable position on the longitudinal bed, and use the boring shaft with the tool extended as the feeding form for boring. The intersection angle error db between the boring shaft axis and the nominal axis of the boring hole in the xz plane and the intersection angle error dg in the yz plane, like the desktop milling and boring machine, have an important impact on the coaxiality of the turning boring hole. As the length of the boring shaft feeding increases, the deflection deformation of the boring bar caused by the self weight of the boring shaft also has a significant impact on the coaxiality of the turning boring hole. Unlike the desktop milling and boring machine, when the boring shaft of the planer desktop milling and boring machine extends to the boring hole, the longitudinally movable column must be fixed in a determined position on the longitudinal bed, and it is important that this determined position can and should be selected.
4. Reasonable determination of tool position on boring machine
When using a column to feed and turn the boring hole on a boring machine, the boring tool clamped on the tool bar of the boring shaft should have a reasonable position along the Z direction. On the one hand, the distance between the tool tip rotation center and the front end face of the spindle box should be slightly greater than half of the total length of the hole (if it is too small, the long hole cannot be bored through, and if it is too large, the stiffness of the boring shaft will decrease); On the other hand, it is also necessary to meet the requirement of placing the center of rotation of the tool tip at the intersection point O of the boring axis and the longitudinal displacement line of the column.

Yancheng Jiejia Machinery Manufacturing Co., Ltd. has various large and medium-sized metal cutting equipment and a team of highly skilled employees with strong design, processing, assembly, testing and debugging capabilities for the production of combination machine tools. Over the years, Jiejia Machinery has taken the path of technological development and continuously developed and produced various combination milling machines. The common components of combination milling machines include milling power heads, mechanical hydraulic sliding tables, lubrication pumps, vertical and horizontal combination milling machines, gantry milling machines, and other specialized machine tools. The products cover domestic industries such as automobiles, tractors, diesel engines, construction machinery, textile machinery, aviation, agricultural and sideline processing machinery, molds, etc., and have received unanimous praise from a large number of users. Consultation hotline:.