Tell to everybody today stress numerical control milling cutter

Milling cutter, it is to be used at what milling machines, those who have one or more tooth rotate cutting tool. Each tooth is ordinal when the job the surplus that cuts work by fits. Milling cutter basically is used at planar, step, groove, figuration is being machined on milling machine the surface and cut off workpiece to wait.

Product type edits

Cylindrical milling cutter

Use on horizontal milling machine to machine plane. Tooth distributings in milling cutter circumferential on, by tooth form cent is straight tine and helix tine two kinds. The number that press tine divides thick tine and serration two kinds. Number of tooth of mill of helix tine thick tine is little, tooth intensity is high, the space that hold bit is large, apply to rough machining; Serration milling cutter applies to finish machining.

Face milling cutter

Milling cutter of the pan of a steelyard, use on vertical milling machine, end panel milling machine or planer-type milling machine to machine plane, end panel and circumferential go up to all have tooth, also have the branch of thick tine and serration. Its structure has whole the type, type that mount a tooth-like part of anything and but dislocation type 3 kinds.

Establish milling cutter

Use at machining groove and step face to wait, tooth is in circumferential go up with end panel, when the job cannot edge axial feed. Should stand when there is the end that carries a center to age on milling cutter, but axial feed.

3 blade milling cutter

Use at machining all sorts of groove and step face, its two flank and circumferential go up to all have tooth.

Angle milling cutter

Cut the groove of proper point of view with Yu Xi, horn having sheet and dual role milling cutter two kinds.

Curium a milling cutter

Use at treatment deep chamfer to mix cut off workpiece, its are circumferential on have more tooth. To reduce the attrition when mill is cut, two side have tooth of ° of 15 ′ ~1 deputy slant horn. In addition, still have chamfer of form of milling cutter of keyway milling cutter, swallow end chamfer, T milling cutter and all sorts of figuration milling cutter.

T form milling cutter

Use chamfer of mill T form.

Product structure edits

Rectify form of characters or letters

Cutter hub and tooth make an organic whole.

Type of integral solder tine

Tooth uses hard metal or material of other wear-resisting cutting tool is made, and drill rod solder is on cutter hub.

Set tine pattern

The method that tooth originallies with mechanical clip originallies closely to go up in cutter hub. This kind of tooth that can change can be the knife head of material of integral cutting tool, also can be to solder the knife head of cutting tool material. Knife head installs the milling cutter that grinds in the blade on cutter hub to call the blade inside body to wear type; Knife head wears type in the outside calling system blade that alone blade grinds on clamping apparatus.

But dislocation type

But dislocation cutting tool: This kind of structure is used extensively already at face milling cutter, establish milling cutter and 3 blade milling cutter to wait.

Edit about milling

Relevant knowledge

Understand milling cutter, be about to understand milling knowledge first

When optimizing milling effect, the razor blade of milling cutter is another main factor, the bit number that if attend cutting at the same time,is in when any milling is an advantage a over, but the bit number that joins cutting at the same time is too much it is defect, when cutting each cutting blade is impossible at the same time cutting, more or less are asks power and the cutting blade that attend cutting concerned, cut bits to fashion a process, for cutting blade load and treatment result, milling cutter photograph went to main effect since the position to workpiece. When face mill, make an appointment with than cutting width with big the milling cutter of 30% and approaching milling cutter position the center at workpiece, so change of the ply that cut bits is not big. Cutting those who cut to cut bits ply a few thinner than the cutting ply in a way when central cutting.

Use to ensure enough tall cut bits ply on average / every tine feed, must agree with correctly certainly the number of milling cutter tooth of this working procedure. The pitch of milling cutter is the distance between effective cutting blade. Can divide milling cutter according to this value for 3 types -- milling cutter of especially close tine milling cutter, scanty tine milling cutter, close tine.

Still have the tool cutting edge angle of face milling cutter with what the ply cutting bits of milling concerns, tool cutting edge angle is bit advocate the included angle between cutting blade and workpiece surface, basically 45 is spend, 90 degrees of horn and circular razor blade, the direction of cutting force changes as tool cutting edge angle different will produce very big change: Tool cutting edge angle basically produces radial load for 90 degrees milling cutter, action is in feed direction, this is meant will be not borne to cross much pressure by treatment surface, weaker to milling structure workpiece is more reliable.

Tool cutting edge angle is 45 degrees milling cutter force of its radial cutting and axial are equal roughly, the pressure that generates so is more balanced, lower also to the requirement of machine tool power, special agree with milling generation collapse is broken the work of short bits material that cuts bits.

The milling cutter of circular razor blade means tool cutting edge angle to change continuously to 90 degrees from 0 degrees, this basically depends on cutting deepness. Intensity of blade of cutting of this kind of razor blade is very high, because the edge grows what cutting blade direction arises to cut bits,compare thin, suit big feed so, along bit radial the direction of cutting force is being changed ceaselessly, and the pressure that generates in machining a process will depend on cutting deepness. It is good that the development of form of chamfer of geometry of contemporary razor blade makes circular razor blade has smooth cutting effect, inferior to demand of machine tool power, stability wait for an advantage. It already was a kind of effective thick milling cutter no longer, there is wide application in face mill He Lixi.

Milling means

Have two kinds of kind relative to the direction of rotation of the feed direction at workpiece and milling cutter:

Arrange mill, go against mill

Arrange mill, go against mill

The first kind is suitable mill, the feed direction of the direction of rotation of milling cutter and cutting is identical, when beginning cutting milling cutter is cut with respect to bite into workpiece cut bits finally.

The 2nd kind is to go against mill, the feed direction of the direction of rotation of milling cutter and cutting is contrary, before milling cutter is beginning cutting, slippage must go up in workpiece a paragraph, it is with cutting ply 0 begin, ply of the cutting when ending to cutting is achieved the biggest.

In 3 blade milling cutter, certain when establishing mill or face mill, cutting force has different way. When face mill, milling cutter as it happens is in of workpiece outside side, the direction of cutting force more should special attention. When suitable mill, cutting force approachs work to workbench, force of the cutting when going against mill makes workpiece leaves workbench.

Because the cutting effect of suitable mill is best, normally first selection arranges mill, when the problem that only when problem of clearance of whorl of machine tool existence perhaps suitable mill cannot be solved, just consider to go against mill.

Below ideal situation, milling cutter diameter should compare workpiece width big, line of milling cutter axes should leave a few spaces a little with work center line from beginning to end. When be being placed to cutting center when cutting tool, produce burr extremely easily. Cutting blade enters cutting and the direction that quit force of cutting of the radial when cutting to will change ceaselessly, machine tool main shaft is likely and oscillatory damage, bit is likely disintegrate and treatment surface will be very rough, milling cutter a little deviate center, cutting force direction will fluctuate no longer -- milling cutter will obtain a kind of preload to carry on one's shoulder or back. We can be in central milling than doing driveway center drives.

When every time of milling cutter razor blade enters cutting, cutting blade should bear concussion load, load size depends on material of the cross section that cuts bits, workpiece and cutting type. Cut when be being cut, between cutting blade and workpiece whether can correct occlusive it is an important way.

When the side outside be located in workpiece width completely when line of milling cutter axes, cutting fashionable wallop is by bit most susceptive of outboard point of a knife, this will mean initial concussion load by cutting tool the most sensitive place bears. Milling cutter is final also be leave work with point of a knife, that is to say bit from begin cutting to arrive leave, cutting force all the time action is in most on outboard point of a knife, till till wallop discharge carries on his shoulder or back. When the central line as it happens of milling cutter is located in on workpiece brim line, achieve when the ply that cut bits the biggest when bit breaks away from cutting, cutting load of the concussion when be being cut to achieve the biggest. When line of milling cutter axes is located in in workpiece width, cut blade of fashionable cutting of edge of initial impact load by the distance the place with the most sensitive further point of a knife bears, and the razor blade when retreating a knife is smoother exit cutting.

To each razor blade, the way that leaves work when blade of the cutting when wanting to exit cutting is important. Be close to material of the rest when retreating a knife to may make more or less bit clearance decreases somewhat. Will produce an instantaneous tensile force when face of the knife before cutting razor blade of the edge when bits breaks away from workpiece and often produce burr on workpiece. This tensile force endangers security of the blade that cut bits below hazardous condition.

Use method edits

The outfit of milling cutter is placed

Machining center admits pinchcock suit to place means mostly with milling cutter, cantilever configuration is in when using. Be in milling treatment process, may appear sometimes milling cutter is extended stage by stage from inside knife clip, is as a result complete? Lose, the picture that workpiece of as a result discards as useless, because the knife puts the Kong Yuxi inside knife clip to be in between knife handle external diameter,its cause is commonly oily film, form clamping force not apply be caused by. When milling cutter leaves factory, besmear commonly have antirust oil, if oil of cutting of the dissolve that be not water is used when cutting, the Kong Ye inside knife clip can adhere to oily film of shape of a mist, sell the Dou Cunzheng on knife handle and knife clip to be when oily film, the knife places knife handle of very difficult firm clamp, the milling cutter in be being machined is caused become loose and lose. Be so before clip of milling cutter outfit, should use the opening inside milling cutter petiole and knife clip clear lotion to clean first clean, luggage of the reentry after wiping is placed.

When the diameter when milling cutter is bigger, although knife handle and knife clip are very clean, produce the accident that break a knife possibly still, should choose at this moment lead the knife handle that cuts smooth breach and corresponding flank locking way.

The appears possibly another problem after milling cutter clamp is the milling cutter in treatment placing port place to break off in the knife, because the knife places use time to grow too,its cause is commonly, ministry of knife clip port already wore away cone-shaped be caused by, should change right now new knife mix.

The vibration of milling cutter

Because be put between milling cutter and Dao Gazhi,be in little space, the cutting tool in machining a process so appears likely oscillatory picture. Oscillatory meeting makes milling cutter circumferential the amount of penetration of a cutting tool of blade is uneven, and the quantity that cut enlarge increases than deciding a value formerly, the influence machines precision and cutting tool service life. But the groove width that goes out when treatment slants hour, can make cutting tool purposefully oscillatory, need groove through increasing the quantity that cut enlarge to win place wide, but answer to be the biggest amplitude of milling cutter under 0.02mm below this kind of circumstance, cannot undertake stable cutting otherwise. The oscillatory Yue Xiaoyue of the milling cutter in normal treatment is good.

When occurrence cutting tool is oscillatory, lv of take an examination lowers cutting speed and feed rate, if both already was reduced 40% hind still put bigger vibration, should consider to reduce penetration of a cutting tool to measure.

If machine fragmentary occurrence resonance, its cause may be cutting speed crosses just of speed of big, feed small, cutting tool is fragmentary firm not outfit of apply, workpiece places force not apply and workpiece appearance or workpiece outfit place essentials to wait for element be caused by, should admit mediation right now cutting dosage, add cutting tool the measure such as speed of feed of fragmentary stiffness, progress.

The cutting carrying sword of milling cutter

In the treatment of numerical control milling that waiting for workpiece antrum in the mould, when be nodded to be next sunken parts or deep antrum by cutting, need lengthen milling cutter reach a capacity. If use long knife milling cutter, because the deflection of cutting tool is bigger, easy be pregnant with produces vibration and bring about cutting tool to fold caustic. Because this is in treatment process, if need cutting tool to carry the edge of ministry close to attend cutting only, had better choose cutting tool overall length to spend longer short blade to grow handle milling cutter. When big diameter milling cutter is being used to process work on machine tool of horizontal numerical control, be out of shape as a result of what self-prossessed place be pregnant with produces cutting tool bigger, should pay attention to the cutting that carry sword to exceed the caption that eminent appears very much more. Below the case that using long knife milling cutter without fail, need to lower cutting speed and feed rate substantially.

Of cutting parameter choose

Of cutting speed choose to basically depend on be pledged by the material of treatment workpiece; Of feed speed choose to basically depend on the diameter that is pledged reach milling cutter by the material of treatment workpiece. A few cutting tool of foreign produce the cutting tool example of manufacturer to choose a watch with parameter of cutting tool cutting, can offer reference. But of cutting parameter choose get machine tool, cutting tool again at the same time the influence of element of fragmentary, many sided be waitinged for by treatment workpiece appearance and outfit clip means, should credential practice circumstance is comfortable sell mediation cutting speed and feed rate.

When be first consideration element with cutting tool life, can lower cutting speed and feed rate appropriately; When the situation leaving sword that cuts bits has been owed, can increase cutting rate appropriately.

Of cutting means choose

Admit suitable mill to be beneficial to defence edge covering, can progress cutting tool life. But have demand paid attention to at 2 o'clock:

If ① admits treatment of general accuracy machine tool, should the clearance of orgnaization of feed of idea put an end to;

When the oxidation film that ② has craft of casting, forge to comprise when workpiece appearance remain or other sclerosis layer, appropriate is admitted go against mill

Common problem:

The means of settlement that insufficient essence follows measure:

1. Excessive cutting:

The deepness when bring down cutting reachs width

2. Machine or secure a lack to allow to spend:

Repair a machine to reach fixed

3. Machine or secure a devoid tigidity:

Provide or changing machine \ to secure is cutting set

4. Blade number is too little:

Use much blade to carry milling cutter