Strong cut into parts and the energy that figuration combination uses develops technology

1. Craft is summarized in recent years, use machine without cutting, board material treatment becomes structural part, have important sense more and more. The ply board makings to 15mm, with coiled strip or the form of makings, as strong what semifinished product uses is increasing also. Essence of life serves as a kind of board makings to process technique to the technology, have special advantage, it can be like embossing with figuration craft, curve the assorted application such as the forge that reach Dui, open up produces a way newly, it is namely in situation of very few a few labor, can machine the functional part that gives high quality, accordingly some cast or the part that pulverous metallurgy makes, can be developed by essence of life replace, inevitable machine treatment lowers lowermost rate. A kind of success that manufactures technology is used, want to rely on its to resolve the appeal of respect of processing technique problem not only, and rely on its economy finally to decide even. Strong geometrical appearance is increasing appearance is changed, and its production lot has many little. One kind machines craft, have high flexibility already only, the spare parts that can make sure treatment gives high quality again at the same time ability is competitive. As corresponding as this, of the mould bases changing a pattern that can pass the part that uses standardization, standardization now and automation send makings and discharge orgnaization, solve one part problem. In addition, we notice essence of life developed craft to expand apparently to use range, but this should rely on to solve a few problems below: (The structural design of 1) workpiece should satisfy the requirement of respect of its function sex, and want comfortable at treatment. (2) first-rate material chooses. (Structure of 3) first-rate mould. The structural design of component part should satisfy function and the requirement that machine a respect, this is the premise with its treatment the basiccest socioeconomic. Want to understand this spare parts to fulfil what kind of function locally in what above all, mix in quality characteristic again next most between treatment method of economy, seek first-rate to combine an aspect. In the structural design of the spare parts, because local demand public errand is strict,do not want, ask the public errand of whole workpiece strict; Because the spare parts is local,also cannot ask the material of high strenth, use whole work the material of high strenth. Pass the real function that knows work only, the treatment method that uses possibly and the public errand that its can achieve ask, what use the property of material, such ability find first-rate to settle the way of the problem. 2. 3 case are cited below applied example, be aimed at a graph 1 in a few kinds of shows spirit are strong, undertake an expatiation. (The control motherboard graph in 1) hydraulic pump shows the control motherboard in be hydraulic pump 2 times, material is 31CrMol2G, ply 8.

5mm, there is chamfer of 6 waists form above, width 5.

75mm, dimension public errand is ± 0.

05mm. Strength of this hardware data is high, groove is wide compare size with makings large bearing very small, this develops difficulty with respect to the essence that decided it; The requirement of public errand of dimension of chamfer of 6 waists form on the spare parts is very strict, when so that be in,turning round this control plate, can control constant oily flow accurately; In addition, the spare parts is all the surface ought to be bright and clean, exterior surface roughness is worth very small, and ask very wear-resisting. Pure cutting treatment is made before this spare parts, it is to use good stuff to cut off first, get chamfer of central aperture, mill next, convert after essence of life develops treatment, contrast economy, because all public errand and function are OK,achieve. The treatment technology with this current part is: With 8.

The 31crM012G metal strip with thick 5mm undertakes in compound model essence of life rushs, go burr, with temper by dipping in water of surface of aeriform nitriding law hard. All developing the bright and clean range that reduces a face to be L00 ％ , exterior surface roughness is worth the maximum Ra=1 that asks under place greatly. 61.

6 μ M, can achieve Ra=0 commonly.

5 μ M. Controlling the treatment key of motherboard to nod is all and bright and clean, exterior surface roughness is worth very small. (Graph of hub of 2) car clutch is shown 3 times for car clutch hub, the avulsion of 10 ％ takes be patient of. The functional surface of this hub if inside tine ministry, the radial edge of square aperture, inside groove and outside circumferential the protruding ear that go up, its public errand is compared relatively big, for ± 0. 1mm, asks exterior surface roughness is worth the Ra=2 that it is feet.

4 μ M, such public errand already can make sure the functional sex of hub asks completely. The bear that bears to often change as a result of this spare parts and bigger wear away, below this kind of circumstance the intensity of material asks ability is the most important, the value of tensile strength Rm of material ought to be between 850 ～ 1050MPa. If choose anneal mild steel to undertake essence of life rushs, next reheat processing, be out of shape as a result of its and cannot take. Choose QStE500 of steel of structure of high strenth fine grain to prove be a success now, the spare parts undertakes in compound model essence of life rushs, going can be being used at assembling after burr. If cutting tool of Nextpage (3) can rushs to constitute treatment with figuration craft with essence of life, criterion the choice of material has important sense more, because be in usually, want above all material figuration, can produce cold good appearance right now, adverse to entering the essence of travel to rush finally. The graph shows the treatment of cutting tool 4 times, it is example of material metabolic extreme, this knife is to be in double platoon is successive and compound be versed in with 6 the pace passes figuration and essence for many times to come out to treatment in the model. This knife is used in dynamoelectric can implement on, no matter from its geometry appearance, in light of the intensity property that still asks from place, should belong to rush complexly. Outside because workpiece is divided,asking dimension common difference is very little, workpiece itself character if clamp position is very large, position of point of a knife is very weak, it is good that workpiece core wants tenacity, and hardness of blade ministry requirement is tall, these make begin to think difficult come out at using pure figuration method to machine. But pass essence of life to develop the assorted technology with figuration now, use double platoon successive and compound model is machined (platoon master drawing sees graph 5) already can come true, and the spare parts does not need follow-up machine treatment. This spare parts machines craft and mould principle now (6) seeing a picture is as follows: Use Ck10 name steel, thick (2 ± 0. The soft anneal of 05)mm makings treatment, tensile strength Rm390MPa, constituent structure is 95 ％ ～ 100 ％ bulbiform cementite all cloth, fixed position aperture, cut rushs in situation of the 1st labor, press beforehand in situation of the 2nd labor form, strong chamfer of situation of the 3rd labor and appearance (bent part) should undertake after the rough sketch that gives a knife to treatment with essence of life is mixed, situation of the 4th labor presses figuration for essence of life, situation of the 5th labor is bend 90. , situation of the 6th labor rushs for the essence of the spare parts fall makings. Pass arenaceous area next grinder goes after burr, the nitrogen that use carbon in all ooze law makes the exterior hardness of the knife achieves 60HRC, undertake plating chromium finally. 3. 3 case that the choice of mould material and case hardening craft choose from above place can see apparently, work is more intricate taller to the requirement of material. Today, on armor plate of thick 20mm of common construction program, can realize punching of essence of life; And go up in the armor plate of high strenth, develop the work with complex external form, have special demand character to the material of rolled steel. The steel of structure of microalloy fine grain that develops in recent years for example, its tensile strength exceeds Rm=800MPa, and its essence develops property still very good. The intensity of material is high, the load that means a mould is high, this not only the structure setting juice that can affect a pattern, and the choice that affects mould data. Process the type of type and mould material, decided to rush quality and mould cost. Hind the wear away and requires lot of both and mould, collective influence solves the economy of the problem. Be based on this kind of reason, to small lot production, general peace can choose simpler mould, increase when necessary additional working procedure; And the production to large quantities of quantities, be worth to introduce the successive combination model of multistage, its job component wants to be machined carefully, make its wear away lower the minorrest rate, reach the tall life of the mould in order to assure. To improve mould life, besides the case hardening craft such as the nitriding that uses a convention and ooze boron, the surface of the working component of the mould is OK the horniness material such as Tu Fu TiN and Tic. Below a lot of circumstances, using hard alloy to regard a mould as material also is very successful, use at making to have the element of figuration working procedure especially, because of figuration when, the plasticity that has workpiece stuff flows, make the mould wears away strongly. The technology sense of coating, depend on making the base material of the mould maintains tenacity, and surface layer material is wear-resisting layer. The outstanding characteristic of horniness material coating, it is to reduce grind bead to wear away, the hot load of the mould is small, the exterior surface roughness of workpiece is worth in Ra=0.

5 μ M is the following. Law of coating of avery kind of has its actor drawback, of the mould life that its can reach rising also is different. Although use CvD method (law of deposit of chemical gas phase) the adhere sex of generated coating and matrix compares PvD standard (deposit of physical gas phase) be close friends, but the component of die of essence of life that makes to using mould steel has coat, just also give below certain and special situation only use. The program of CvD law coating is quench, coating, below the reaction temperature of more than 1000 ℃ , quench can cause quench be out of shape, this is the dimension change with bigger unallowed of strong to essence of life technology. Now, use relatively young PvD law to undertake Tu Fu, get more and more attention, because have PvD way when, the temperature of exterior coating maintains it is under 550 ℃ , the dimension of the organization of mould material and mould won't produce change. CNC Milling