What does industry design bore craft to have? About bore technology common sense comprehensive and analytic

What does industry design bore craft to have? About bore technology common sense comprehensive and analytic there are a such common technologies between industrial design, whether had you understood? No matter be furniture design, still be digital products plan, industrial product products plan, need bore, the quality of bore depends on fixed position whether accurate, aperture bright and clean. A such common and extremely common craft are holding significant position among industrial design undoubtedly, whether do you have sufficient understanding and knowledge to a such craft? Design with furniture for, stiletto is the indispensable craft in technology of production of board type furniture, organization of technology of spare parts stiletto is reasonable, affect manufacturing efficiency and manufacturing cost directly. Actor concept announces industry to design bore craft what to have for you below, and inside the industry about bore technology common sense analytic. Broach regards Kong Jia as the most common cutting tool in labour, in be being applied extensively at machinery to make, especially to cooling device, generate electricity the treatment of the spare parts aperture such as the tube plate of equipment and vapour generator, it is important that applied face is mixed extensively particularly. One, get cut characteristic broach to have two normally advocate cutting blade, when treatment, broach undertakes cutting at the same time in revolving. Of broach before part comes by central axes outside the reason is bigger and bigger, the cutting rate of round part broach outside be close to more is higher, decrease successively to central cutting speed, the whirl of broach central cutting speed is 0. The horizontal blade of broach is located in near axes of centre of turning circle, of horizontal blade deputy before part is larger, without the space that hold bit, cutting rate is low, the axial with meeting consequently larger generation fights force. If point of will horizontal blade repairs wear DIN1414 medium A or C, the cutting blade near central axes is before horn, can reduce cutting to fight force, improve cutting performance significantly. What wait according to workpiece appearance, material, structure, function is different, broach can be divided for a lot of sort, for example high-speed steel broach (twist drill, group auger, flat auger) , broach of integral hard alloy, but dislocation shallow Kong Zuan, deep Kong Zuan, set makings getting and can change head broach to wait. Bore craft characteristic: 1.

Broach is easy and deflective. Because the influence centering of horizontal blade forbids, cut fashionable broach is brought easily slant; And the tigidity of broach and oriented action are wronger, the broach when cutting bends easily. When the bore on drilling machine, the axes deflection that causes aperture easily and not straight, but bore diameter does not have marked change; When the bore on lathe, cause the change of bore diameter easily, but the axes of aperture is remained straight. Accordingly, answer to machine end panel first before bore, use bit or central getting drills an awl hole beforehand, so that broach centering. Get alveolus and deep Kong Shi, the axes deflection to prevent opening and not straight, answer to use workpiece circumgyrate means to undertake bore as far as possible. 2.

Bore diameter expands easily. Get the bit when cutting radial load of two cutting blade differs will cause bore diameter to expand; When center lathe bore cut bring slanting also is the main reason that bore diameter enlarges; In addition the reason that the radial of broach beats etc also is to cause bore diameter to expand. 3.

The exterior quality of aperture is poorer. Auger cut cut bits wider, be forced to coil inside aperture for helix shape, the with attrition of hole wall happening scratch when pouring out of already machined the surface. 4.

Get muscularity of the axial when cutting. This basically is caused by the horizontal blade of broach. The of 50% axial force when bore and the torque of 15% arise by horizontal blade. Accordingly, when 30mm of ﹥ of bore diameter D, general component second undertake getting cutting. Get for the first time (0.

5~0.

7)d, get needs aperture the 2nd times. Because horizontal blade does not attend cutting the 2nd times, reason can use bigger feed, make the exterior quality of aperture and productivity all get rising. 2, the cutting that breaks bits and platoon bits broach is in the space narrow Kongzhong undertakes, cut bits must eduction of channel of classics broach blade, because this cuts bits figure,affect to the cutting function of broach very big. The common form that cut bits has a state bits, bits tubal account, acicular bits, cone-shaped helix bits, banding bits, sector bits, farinaceous bits. Get the key that cuts treatment- - when the control that cut bits should cut bits appearance impropriety, will produce the following problem: ① is subtle channel of blade of the block that cut bits, affect bore precision, lower broach life, make broach breaks off even (wait for) like farinaceous bits, sector bits; ② is long cut bits to worry bit, cloggy exercise, cause broach to fold caustic or fluid of block up cutting to enter hole inside (like helix bits, banding the) such as bits. How to solve the problem of impropriety of the appearance that cut bits: ① can part or use jointly increase feed, intermittent feed, repair the blade that grind a horizontal stroke, outfit to break bits implement wait for a method to improve bits and platoon bits result, eliminate the problem that poses because of cutting bits. ② can use stiletto of professional the broach that break bits. For example: The sword breaking bits that increases a design in the groove of broach will cut bits to interrupt become what keep clear of more easily is drossy. Eliminate drossy and smoothly along groove, won't happen in the phenomenon that jams inside groove. Consequently new-style broke bits getting to obtain fluenter than traditional broach a lot of cutting effects. At the same time short refrigerative fluid sorts broken iron filings more easily to get a tip, improved treatment process to come loose mediumly further hot effect and cutting function. And the whole groove that wore bit because of the sword breaking bits that increases newly, its appearance and function still can maintain after be being ground through be being repaired for many times. Outside be being improved except afore-mentioned functions, be worth what carry is this design aggrandizement the tigidity that gets system, increased sheet significantly second the amount that builds the bore before grinding. 3, the precision of bore precision aperture basically is spent by precision of bore diameter dimension, position, coaxial, the element such as surface roughness of circularity, surface and orifice burr is formed. Get the influence when cutting treatment to be machined the element of aperture precision: The outfit of ① broach places precision and cutting condition, fluid of speed of the clip that be like a knife, cutting, feed, cutting; ② broach dimension reachs figure, wait like the figure of department of broach length, blade, appearance that get core; ③ workpiece appearance, if orifice flank appearance, orifice appearance, ply, outfit blocks condition,wait. ▼ 1.

Reaming reaming is by the broach in treatment swing those who cause. The knife places swing to be affected to the fixed position precision of bore diameter and aperture very big, because this wears away when knife clip serious when should change in time new knife clip. Get when cutting alveolus, wobbly measurement and adjust all more difficult, had better use blade ministry and petiole coaxial to spend bit of better diameter of wide authority small blade so. Use when grinding broach to machine again, because,causing the cause that aperture precision drops is more from the back appearance asymmetry be caused by. Control blade tall difference can control the amount cutting enlarge of aperture effectively. 2.

The circularity of aperture because the vibration of broach, the pass that gets shows polygon very easily, the grain that resembles rifling appears on hole wall. Common polygonal Kong Duo is a triangle or pentagonal. The account that produces triangular aperture is the broach when bore has two centre of turning circle, they press every interval the 600 frequency that exchange are oscillatory, oscillatory reason basically is cutting fights force lopsided, when broach roll turns hind, because the aperture circularity of treatment is bad, cause the 2nd turn force is fought when cutting lopsided, repeat again last oscillatory, but oscillatory and phasic have certain deflection, cause appear on hole wall rifling grain. After bore deepness reachs certain level, the attrition of face of arris of broach first flank and hole wall increases, oscillatory attenuation, rifling disappears, circularity ameliorates. This kind of pass sees orifice show funnel from fore-and-aft section plane model. Same reason, pentagonal, heptagonal aperture still may appear to wait in cutting. To eliminate this appearance, differ except height of blade of oscillatory to collet, cutting, from the back outside reaching the element such as asymmetry of blade valve appearance to undertake controlling, still should adopt raise broach tigidity, raise every to turn the feed, horn after reducing, write the measure such as the blade that grind a horizontal stroke. 3.

The range of penetration of a cutting tool that reachs bit of the bore on curved surface in oblique plane or get when appearing a face to be oblique plane, curved surface or a flight of stairs, fixed position precision is poorer, because right now broach is radial and bosseyed penetration of a cutting tool, make cutting tool life is reduced. To raise fixed position precision, can take the following step: A.

Drill central hole first; B.

With establish milling cutter hole milling; C.

Choose the bit with cut good into the gender, tigidity good; D.

Lower feed rate. 4.

The processing of burr is gotten in cutting treatment, can appear in the entrance of aperture and exit burr, when machining the stuff with old tenacity and thin plate especially. Its reason is be about to get when broach when appearing, be out of shape by treatment material occurrence plasticity, after the triangular part of cutting of point of share of the predestined relationship outside answering to be stood by by broach originally at this moment suffers effect of axial cutting strength, be out of shape outward side bends, below the action that pours horn and face of first flank arris in the predestined relationship outside broach farther curly, form an edge or Mao Bian. 4, get cut treatment condition general broach product has what arrange by treatment material in appearance book catalog " reference expresses basic cutting dosage " , the cutting dosage that the user can consult its are offerred chooses to get the cutting condition that cuts treatment. The choice of cutting condition is proper, should pass try cutting, wait for an element to be judged integratedly according to machining life of efficiency of precision, treatment, broach. 1.

Broach life and treatment efficiency are satisfying the premise that is asked by treatment work skill to fall, the use of broach is proper, basically answer to be measured integratedly according to broach service life and treatment efficiency. The evaluation index of broach service life can choose cutting distance; The evaluation index that machines efficiency can choose feed career. To high-speed steel broach, the effect that broach service life suffers slewing speed is bigger, suffer every to turn the influence of feed is minor, can turn through increasing every so feed will improve treatment efficiency, assure longer broach life at the same time. But should notice: If every turn feed is too big, the meeting that cut bits is added thick, cause bits difficulty, because this must be cut through trying,can break bits smoothly surely truly every turn feed limits. To hard alloy broach, way of the part before cutting blade is lost is ground have bigger pour wine cup, every turn the optional scope of feed is less than high-speed steel broach, if every turn in treatment,feed exceeds this range, can lower broach service life. As a result of the broach of high-speed steel of hear resistance prep above of hard alloy broach, slewing speed is very small to the influence of broach life, because this can use the method that increases slewing speed to improve the treatment efficiency of hard alloy broach, assure broach life at the same time. 2.

The cutting of the reasonable use broach of cutting fluid is in the space narrow Kongzhong undertakes, because the sort of this cutting fluid is reached,give the treatment precision that notes means to reach aperture to broach life to have very big effect. Cutting fluid can be divided for water-solubility and blame water-solubility two kinds big. The lubricity that is not water-solubility cutting fluid, wellability and fight stick it is better to receive a gender, still have antirust effect at the same time. The cooling sex of water-solubility cutting fluid is better, do not send smoke and without combustibility. Stem from the consideration to environmental protection, the use amount of water-solubility cutting fluid is larger in recent years. But, if the attenuant fold of water-solubility cutting fluid is undeserved or cutting fluid is degenerative, can shorten greatly cutting tool service life, in be being used so, must try to notice. It is water-solubility or fluid of blame water-solubility cutting no matter, in using, must make cutting fluid reachs cutting point adequately, be opposite at the same time number of the discharge of cutting fluid, pressure, nozzle, cooling means (inside cold or outside cold) wait to must be controlled strictly. 5, the differentiate standard that the new blade of broach grinds broach to grind differentiate broach to need new blade to grind again is: 1.

The wear extent of face of arris of cutting blade point, horizontal blade, first flank; 2.

By the dimension precision of treatment aperture and exterior surface roughness; 3.

Cut the color of bits, figure; 4.

Cutting fights force (the main shaft electric current, noise, indirect value such as vibration) ; 5.

Treatment amount. The basis answers in be being used actually particular case, determine accurate, convenient differentiate level from inside afore-mentioned index. When using wear extent to regard differentiate as the standard, should find out economy best optimal grind again period. Because main blade grinds place to be,mix at the back of the head horizontal blade, if broach wear extent is too big, when blade wear and tear much, grinding amount is large, can grind a frequency to decrease again (the × of cutting tool life after the = of total service life of cutting tool is ground again can grind frequency) again, can shorten instead the total service life of broach; When using level of differentiate be servinged as by the dimension precision of treatment aperture, use column plan or be restricted compasses is not the quantity cutting enlarge that examines aperture, straight degree etc, once exceed control value, should new blade is ground on the horse; When using cutting to fight force to regard differentiate as the standard, can use what set bounds to be worth more than (like main shaft electric current) stay the way such as machine automatically instantly; When using treatment amount limit to manage, should integrated afore-mentioned differentiate content, set differentiate standard. The blade of broach grinds a method when new blade worries bit, blade of best use broach grinds special machine tool or all-purpose tool grinding machine, this pair makes sure broach service life and treatment precision are very important. If be gotten so model treatment position is good, can press get formerly model grind again; If be gotten formerly model have drawback, can improve appropriately by use purpose from the back appearance and undertake horizontal blade is repaired grind. The following should notice when blade grinds: 1.

Prevent overheat, avoid to reduce broach hardness; 2.

The injury that should get on broach (especially the injury of position of side of first flank arris) all eliminate; 3.

Get model should symmetrical; 4.

Blade is ground in the attention does not touch point, answer the burr after eliminate blade is ground; 5.

To hard alloy broach, blade grinds appearance to be affected to broach function very big, when leaving factory auger model it is classics science design, experiment repeatedly those who reach is optimal auger model, yuan Ren should maintain commonly when because this is new,blade is ground model. Products plan cost is all sorts of different designs that wait for a respect according to technology, craft, equipment, quality, function, function plan, business accounting and the different cost level that calculate new product to be achieved possibly after formal put into production, it is pair of new product development and old product transform the main component that undertakes feasibility is analysed, the purpose depends on proving the economy of products plan, effectiveness and feasibility. Regard products plan as division, be familiar with and understand all sorts of material technology common sense to shape finally to the product dozen of edition appear on the market to having undoubtedly urge action actively CNC Milling