CN203636046U

CN203636046U - Bull mill

Info

Publication number: CN203636046U
Application number: CN201320852844.XU
Authority: CN
Inventors: 杜昌清
Original assignee: CHENGDU BANGPU ALLOY MATERIALS Co Ltd
Current assignee: Chengdu Bangpu Cutting Tools Co ltd
Priority date: 2013-12-23
Filing date: 2013-12-23
Publication date: 2014-06-11
Anticipated expiration: 2023-12-23

Abstract

The utility model discloses a bull mill. The bull mill comprises a blade body, wherein a screw hole is formed in the middle part of the blade body and is formed at the upper end surface, the blade body comprises four side surfaces, two adjacent side surfaces are location surfaces, one side surface is a main rear corner and is provided with a main knife, the other side surface is an auxiliary rear corner and is provided with a rear knife, and circular arc surfaces are respectively arranged at the joint of the main knife and the upper end surface and at the joint of the rear knife and the upper end surface. The shapes of the main knife and the rear knife are improved, the main knife is provided with a convex arc blade and a concave arc blade which are used as processing blades, and when the bull mill is used for processing a deep groove and suspending depth, the cutting force is always constant even if cutting depth changes constantly; due to the improvement of the main rear corner and the auxiliary rear corner, the included angle of the rear corner and the cutting plane is increased, so that the blade is prevented from tipping.

Description

A kind of round nose cutter

Technical field

The utility model relates to machine cut cutter, is specifically related to a kind of round nose cutter.

Background technology

Round nose cutter referred to that the length of circular arc portion was greater than 1/4 circle, was generally embedded structure, and more allowing blade replacement all can make tool dimension generation slight change at every turn, does not have static cutting edge, and the wearing and tearing of blade are also less, and cutter spacing also can strengthen.But, because cutter front end exists blind area, may there is " top cutter " phenomenon at some narrow and small sunk areas.Also have, because the automatically clear angle function of existing machining software is all to scout according to ball cutter, even if the reference cutter that you set is round nose cutter, but always the ball cutter with same diameter carrys out reference in Practical Calculation process, if follow-up direct use automatically clear angle processing, can process not in place at the sunk area of some.

Existing round nose cutter is in working angles, and feed rate can not increase with the degree of depth, and cutting force cutting-in increases and increases.

In order to solve above-mentioned deficiency of the prior art, the utility model proposes a kind of new solution.

Utility model content

The purpose of this utility model is to provide one can improve cutting-in feed rate, makes cutting force be always the round nose cutter of constant force.

For reaching above-mentioned purpose, the technical scheme that the utility model adopts is: a kind of round nose cutter is provided, comprises blade body, the middle part of blade body is provided with screw hole, and screw hole is located at upper surface; Blade body comprises four sides, and wherein two adjacent side are locating surface, and a side is primary clearance, which is provided with operator, and another side is front clearance, which is provided with rear cutter; The junction of described operator and rear cutter and upper surface is equipped with arc surface; Described operator comprises the interconnective arcuate blade limit concaving and cambered outwards camber sword limit.

Preferably, the angle of primary clearance and front clearance and cutting plane is 11 degree.

In sum, the utlity model has following advantage:

1, the utility model improves operator and the shape of rear cutter, and operator is provided with two arcuate blade limits of evagination and indent as processing sword, and in deep trouth processing and outstanding greatly when dark, although cutting-in constantly changes, cutting force is always constant force;

2, by the improvement to primary clearance and front clearance, the angle of relief angle and cutting plane is increased, can avoid blade tipping.

Accompanying drawing explanation

Fig. 1 is schematic diagram of the present utility model.

Wherein, 1, blade body; 2, screw hole; 3, upper surface; 4, locating surface; 5, primary clearance; 6, operator; 7, front clearance; 8, rear cutter; 9, arc surface; 10, arc surface; 11, arcuate blade limit; 12, arcuate blade limit.

The specific embodiment

Below in conjunction with accompanying drawing, the specific embodiment of the present utility model is described in detail.

As shown in Figure 1, the utility model provides a kind of round nose cutter, comprises blade body 1, and the middle part of blade body 1 is provided with screw hole 2, and screw hole 2 is located at upper surface 3; Blade body 1 comprises four sides, and wherein two adjacent side are that 4, one sides of locating surface are primary clearance 5, which is provided with operator 6, and another side is front clearance 7, which is provided with rear cutter 8.Operator 6 and rear cutter 8 are provided with arc surface 9 and arc surface 10 with the junction of upper surface 3.Operator 6 comprises the interconnective arcuate blade limit 11 concaving and cambered outwards camber sword limit 12.

Primary clearance 5 and front clearance 7 are 11 degree with the angle of cutting plane, and wherein cutting plane refers to that lathe tool is adding residing plane in man-hour, and while referring generally to round nose cutter horizontal positioned, upward, vertical plane is now cutting plane in upper surface 3.

In application, overhang according to cutter, suitably reduce the amount of feeding; When carrying out square shoulder milling and cutter part along the edge of work while being positioned at beyond workpiece, feeding reduces half.In the time of helical milling, half is lowered in feeding; Or cutter is in the time of feed withdrawing, and half is lowered in feeding; For vertical machine, suggestion is used air blast, so that iron filings blow away from workpiece.

Although by reference to the accompanying drawings the specific embodiment of the present utility model is described in detail, should not be construed as the restriction of the protection domain to this patent.In the described scope of claims, the various modifications that those skilled in the art can make without creative work and distortion still belong to the protection domain of this patent.

Claims

1. a round nose cutter, is characterized in that: comprise blade body, the middle part of blade body is provided with screw hole, and screw hole is located at upper surface; Blade body comprises four sides, and wherein two adjacent side are locating surface, and a side is primary clearance, which is provided with operator, and another side is front clearance, which is provided with rear cutter; The junction of described operator and rear cutter and upper surface is equipped with arc surface; Described operator comprises the interconnective arcuate blade limit concaving and cambered outwards camber sword limit.

2. round nose cutter as claimed in claim 1, is characterized in that: the angle of described primary clearance and front clearance and cutting plane is 11 degree.