CN201089027Y

CN201089027Y - Drilling-milling combined tools

Info

Publication number: CN201089027Y
Application number: CNU2007201442902U
Authority: CN
Inventors: 闵家康
Original assignee: SHANGHAI HUIDA MANUFACTURING Co Ltd
Current assignee: SHANGHAI HUIDA MANUFACTURING Co Ltd
Priority date: 2007-11-06
Filing date: 2007-11-06
Publication date: 2008-07-23
Anticipated expiration: 2017-11-06

Abstract

The utility model provides a drilling and milling combined cutting tool, comprising a drill bit and a milling cutter connected with the drill bit into a whole. The transitional section C from the tail end of a ligament of a drill bit to the front end of the of the milling cutter is in a concave-down shape along the circumferential direction; the length of the transitional section C from the tail end of a ligament of a drill bit to the front end of the milling cutter is larger than the thickness L of the wall of a through hole. The drilling and milling combined cutting tool solves the problem that when processing holes and planes, the common combined cutting tool is likely to give rise to processing vibration lines on processed surfaces, and increases the pass rate of products.

Description

Brill mills gang tool

Technical field

The utility model relates to a kind of gang tool, and particularly a kind of brill mills gang tool.

Background technology

Along with the development of auto manufacturing, in the production of auto parts and components,, improve working (machining) efficiency in order to reduce production costs, gang tool has obtained using widely.The precondition of using gang tool is that lathe, anchor clamps, part must have enough rigidity, but at present a lot of auto parts and components all are aluminium alloy castingses, wall is thin, out-of-shape and rigidity are relatively poor, when with general gang tool on these parts simultaneously when machining hole and plane, effect is very undesirable, the plane that is processed is easy to occur chatter mark, caused in batches and done over again, so that production cost improves greatly, and how utilizing the relatively poor parts of gang tool processing rigidity is problems needing solution badly.

The utility model content

The utility model provides a kind of brill to mill gang tool, is intended to solve common gang tool in the man-hour that adds to hole and plane, is prone to the problem of processing chatter mark on the surface that is processed.

Technical scheme provided by the utility model is as follows:

A kind of brill mills gang tool, comprises drill bit and the milling cutter that is connected as a single entity with it, it is characterized in that:

Circumferencial direction along the drill bit ligament ends to milling cutter front end changeover portion C is recess, and described bit diameter A is greater than the diameter D of changeover portion;

Described drill bit ligament ends arrives the length of milling cutter front end changeover portion C greater than through hole wall thickness L.

Adopt said structure, when drill bit pierces processed part, because the diameter along the drill bit ligament ends to milling cutter front end changeover portion is less than bit diameter, make the add man-hour of milling cutter to the part plane, boring can not produce interference to the changeover portion that enters in the boring, therefore milling cutter is unaffected to the plane processing work of part, guaranteed the surface quality on hole and plane, reduced the generation of chatter mark, the first-time qualification rate of product greatly improves, and process time is only than having increased about 1 second common process time.

Description of drawings

Be further detailed below in conjunction with accompanying drawing:

Fig. 1 bores the structural representation that mills gang tool for the utility model.

Fig. 2 bores the working state figure that mills gang tool for the utility model.

Among the figure 1, drill bit 2, milling cutter 3, bore and mill combined cutter 4, part A, bit diameter B, milling cutter end diameter C, drill bit ligament ends to milling cutter front end changeover portion D, changeover portion diameter, L, through hole wall thickness

The specific embodiment

As shown in Figure 1, the utility model bores and mills gang tool, the milling cutter 2 that comprises drill bit 1 and be connected as a single entity with it; As shown in Figure 2, when using this brill to mill gang tool, at first 1 pair of part of drill bit carries out the processing in hole, after drill bit 1 is finished boring work, drill end passes boring, milling cutter 2 beginning processing planes, at this moment the drill bit ligament ends is in the hole to milling cutter front end changeover portion C, because this changeover portion diameter D is less than bit diameter A, the length of transitioning end C is greater than the through hole wall thickness L of institute's process component, this moment, drill bit 1 no longer contacted with institute processing parts 4, bored and milled the work of two steps and do not disturb mutually, and the processing plane work of one side milling cutter 2 is unaffected, chatter mark seldom appears processing in plane surface, also guaranteed the surface quality of institute's machining hole on the other hand, such hole that processes and plane surface quality all are improved, and have improved the first-time qualification rate of product greatly.

Claims

1. bore and mill gang tool, the milling cutter (2) that comprises drill bit (1) and be connected as a single entity with it, it is characterized in that: the circumferencial direction along the drill bit ligament ends to milling cutter front end changeover portion C is recess, described bit diameter A is greater than the diameter D of changeover portion, and described drill bit ligament ends arrives the length of milling cutter front end changeover portion C greater than through hole wall thickness L.