How to select the proper tool handle in turning milling compound machining
Turning milling compound machining is a multifunctional lathe that uses the joint movement of workpiece rotation and tool rotation to realize the cutting of workpiece. One clamping can complete turning, milling, drilling, three-axis linkage processing, etc., so it is also called "multitask CNC lathe". Because it can complete most or even all processing items in one setting, the processing precision and production efficiency are greatly improved. Although the price is not cheap, it is also accepted by more and more users.
How to choose the handle of such expensive turning milling machine? It must be a concern of many manufacturers. The tool handle of ordinary CNC lathe is very familiar to everyone, but there are still many people who do not understand the tool handle of turning milling cutter. First of all, let's understand the classification of milling composite tool shank.
1. Classification of turning milling composite tool rest
According to the processing method, it can be divided into two categories: one is the milling cutter holder, the other is the turning cutter holder and the milling cutter holder: this category is basically equivalent to the ordinary machining center. There are many kinds of tool handles, including ordinary tool handles, powerful tool handles, hydraulic tool handles, face milling tool handles and boring cutters. I won't repeat them here. Next, we mainly introduce a cutting tool handle.
The turning tool handle has a feature that only the workpiece rotates, and the tool handle does not rotate.
According to the specifications of the taper shank of the lathe spindle, there are mainly three types: BBT (BIG-PLUS), CAPTO and HSK-T.
1) BBT is a double-sided positioning connection system developed on the basis of the original 7:24 taper BT tool handle;
2) CAPTO is a double-sided positioning connection system of 1:20 taper pyramid structure; (The above two are very mature and widely used tool holders and spindle connections.)
3) HSK-T is standardized in recent years. Based on HSK-A (1:10 taper) series, it is improved to meet the requirements of turning and milling composite tool shank type. It is developed on the basis of the original HSK-A. When turning and milling in Dongguan, the width tolerance of the transmission keyway is more strictly controlled to improve the problem of tool tip height change during turning. HSK-A series tool shank can be used for milling.
2. Combined tool rest
The specific types of combined tool rest can be divided into two types: inclined type (45 °) and orthogonal type (90 °).
1. Inclined type: the cutting force is mainly along the axis of the tool holder, and the torque of bearing B is small, which is more favorable for the lathe spindle. Because of the 45 ° inclination angle, the overhang of the cutter bar can be reduced, and the interference between the spindle and the lathe chuck can be easily avoided. It is suitable for turning the end face and the outer circle of shorter or larger diameter workpieces
2. Orthogonal type: it is a general type, with rich left and right tool handles to choose from, and can also be used with ordinary turning tool bars and boring bars, suitable for most turning conditions. For the processing of long workpieces, it is also helpful to avoid disturbing the tailstock of the lathe.
Through the above introduction, I believe that you have a certain understanding of Dongguan turning milling composite processing tool handle, and I believe that when you choose the tool handle, you also know what type of tool handle to use for processing.