K1000 rail welder promotes the development of tumour knife

Summary: Developed use multilayer the K1000 rail welder of v craft turns tumour knife, characteristic of the material option that introduced this knife that push tumour, structure and treatment want a place. 1 foreword to build railroad of the first high speed of our country -- Qin Huang island, special railway line of Shenyang passenger transport, one bureau imported iron in the K1000 rail welder that the institute produces a Wukelanbadu, be used at rail of this special railway line without seam change base to solder. K1000 rail welder turns tumour knife is to be used after rail solders to soldering the Yu Gaojin after the solder of contact is machined all right (push tumour) namely. Solder through pushing tumour knife to be opposite the treatment of contact, the workload of burnish of the foreword after can decreasing, make welding line surface shapes beautiful, solder quality rises. The need after using period of time as a result of welder changes fragile, and the knife that push tumour is one of spare partses of the easiest attaint on K1000 rail welder, import from abroad not only costly and the price is periodic longer, satisfy manufacturing need hard. Accordingly, what the author was in an unit to begin the knife that push tumour is homebred change research. The design of the 2 knives that push tumour because the movement pushing tumour of K1000 rail welder is solder in rail undertake instantly after the end, because this turns tumour knife,be the job below the high temperature environment that controls in 1000 ℃ ; And the knife that push tumour is surrounding the sub loop of welder, because sub loop electric current is very big, to reduce electromagnetism loss, prevent to push tumour knife to give out heat, must consider to turn the antimagnetic performance of tumour knife material. The basis turns the abominable work environment of tumour knife and working case, 3 respects ask under main when the design consideration: ① material should have very tall red rigid, wear-resisting caustic, tenacity is good, intensity is high; The rail connect surface that ② machines is slick, hind foreword allowance is lesser and allowance is even; ③ pushs tumour knife to should have bits function and antimagnetic function. 2.

The place when 1 material chooses welder to import deserves to turn tumour knife (the institute produces Wukelanbadu) Т of С of О of Г of the Russia before rolled steel brand is 12$18%10&(the steel in 5632 standards, for austenite form stainless steel and refractory steel, can use at making high temperature resistant component and non-magnetic component) , through inquiring a data, discovery to it corresponding homebred steel brand is the 1Cr18Ni9Ti in GB/T1221. The chemical composition of 10 Т and 1Cr18Ni9Ti reachs 18 Н of 12 Х mechanical function contrasts to see a table respectively 1 with the watch 2. 18 Н of Х of watch 1 12 the chemical composition of 10 Т and 1Cr18Ni9Ti contrasts ≤ of 5632) of Т of С of О of Г of steel grade CSiMnPSCrNiMoWTi12X18H10T(0.

12 ≤ 0.

8 ≤ 2.

00 ≤ 0.

035 ≤ 0.

0217.

00 ～ 19.

009.

00 ～ 11.

00 ≤ 0.

30 ≤ 0.

5 × of 20 ≥ C%1Cr18Ni9Ti(GB/T1221) ≤ 0.

12 ≤ 1.

0 ≤ 2.

00 ≤ 0.

035 ≤ 0.

0317.

00 ～ 19.

008.

00 ～ 11.

00 -- 5 × (C%-0.

02) ～ 0.

18 Н of Х of 80 watches 2 12 the mechanical function of 10 Т and 1Cr18Ni9Ti contrasts steel grade heat treatment σ B(MPa) σ 0.

Hardness of 2(MPa) δ 5(%)Ø(%) (1100 ℃ of ～ of 5632)1050 of Т of С of HB)12X18H10T(Г О , empty, oil or water-cooling 5101954055, 1Cr18Ni9Ti(GB/T1221) solid dissolve 1150 ℃ of 920 ～ , fast cold 5202054050 ≤ work below the 187 high temperature environments that because turn tumour knife,control in 1000 ℃ , because this must undertake specific finishing to blade. Via working to turning tumour knife environment and treatment requirement undertake an analysis, the choice is multilayer v craft undertakes blade finishing. Use v craft to be able to increase blade wearability and corrosion resistance, prolong life of the knife that push tumour thereby; In the meantime, nicer in tenacity mother capable person (the metallic appearance that takes a tall hardness is made on 1Cr18Ni9Ti) , can win combination of first-rate material function. The temper that when choosing blade v material, should consider in high temperature working environment issues a likelihood to cause sclerosis of blade v metal to organize or the temporary bate that stabilize an organization, aggravate that because generation photograph changes,makes its hardness and brittleness produce change and likelihood to cause oxidizes or have like the scales of a fish. In addition, the hot exhaustion that because thermal stress brings about blade v to organize,the alternant change of temperature still meets or thermal shock are destroyed. Because cobalt radical alloy controls the hardness that still can keep taller in 650 ℃ , have fight abrade high ability and low coefficient of friction and taller fight oxidisability, corrosion resistance and heat-resisting function, accordingly, can choose cobalt radical alloy to regard the exterior v of blade as material. Through integrated consideration, the refractory steel 1Cr18Ni9Ti that chooses to have antimagnetic to change pushs tumour knife cutter hub as K1000 rail welder, choose cobalt radical alloy to regard the exterior v of blade of the knife that push tumour as material. Graph 1 graph 2 graphs 3 graphs 4 graphs 52.

The knife pushing tumour of welder of rail of K1000 of 2 structures design is overall the structure sees a picture 1. Cent of the knife that push tumour is two or so, sell through whorl fixed go up in tool carrier, by oil pressure crock control tool carrier is made two razor blade shut, apart and complete the action that push tumour. The useless bits after because welder pushs tumour,the choice breaks bits structure is shown close condition and temperature is higher (2a) seeing a picture, get off from very long rail hard, must break the useless bits that close two paragraphs of above, so that clear. Two side are choice rail bottom bits mouth, make course bottom abandons bits to be able to drop automatically, rail head and waist abandon bits also but easily winkle (in complex special 3 paragraphs of above can cut useless bits on the machine that push tumour, make all useless bits all can drop automatically) . Can use bits knife to machine a law (machine fracture surface to be in first) or the method that fracture surface place takes bit will realize the two side end course to break bits. The knife that break bits machines a law: Outside bottom of course of the knife that push tumour side place increases two swords that break bits (3a) seeing a picture, the Yu Gaolai after using bits knife to machine the solder that bits is in first achieves bit (the appearance breaking bits after treatment sees graph 2b) . But the space that the welder when using this kind of method must want to installation breaks bits knife. Fracture surface handles way taking bit: Retraction of blade of the two side end the path that will choose tumour knife (3b) seeing a picture, make ministry of the place blade machines the Yu Gao after solder, will achieve bit (the appearance breaking bits after treatment sees graph 2c) . Use this kind of method to will solder in rail the two side end contact course leave the Yu Gao after having a few solder, need classics burnish eliminate. Graph 3 compare two kinds of afore-mentioned methods, stay considering K1000 rail welder dimensional position can install bits knife, push the burnish workload after tumour to decrease, improve treatment efficiency, because this chooses bits knife to machine a law (methodological ① , machine fracture surface to be in) first. Two knives that break bits secure the or so bit that shoving tumour knife to go up respectively by fixed position bolt (1) seeing a picture. The horn after deciding is pulled to prevent to promote appearance of the welding line after tumour, make sure welding line connect shapes beautiful, the crucial point that push tumour is due and certain hind horny α ; Considering blade hardness difficult treatment avoids to reduce the intensity of blade at the same time, horny α should be apart from point after L(of a paragraph of distance sees graph 4) . Graph 4 graphs of dimension of blade of dimension of 5 certain the crucial point is the key that realizes the treatment that push tumour certainly: If blade size is too large, the burnish workload that after pushing tumour, stays is too big, lost the sense that pushs tumour; If blade size is too small, mother course is injured likely when pushing tumour, cause a loss. In addition, as a result of occupation standard of our country railroad " rail type dimension " in formulary rail waist is the biggest tolerance amounts to 1mm, the biggest tolerance is other part commonly 0.

5mm, rail dimension also is not completely consistent, because this must choose proper blade measure. Through the analysis, size of certain the crucial point is larger than dimension of standard rail type 1 ～ 1.

5 Mm. Use of blade ply certainly multilayer when v craft, require performance to make sure v layer has place, be opposite considering mother capable person the attenuant action of v layer (namely the influence) of attenuant rate, blade ply should increase appropriately; And considering v material the price of cobalt radical alloy is high, blade ply should decrease as far as possible. After integrated consideration, ply of certain the crucial point is taken commonly for 8 ～ 12mm. The following problem basically should note when the treatment of the 3 knives that push tumour machines K1000 rail welder to turn tumour knife: Dimension of blade of the knife that push tumour is dimension of copy rail type, form is more complex and the horn after needing to machine, accordingly the fiducial choice of its key working procedure should agree, machine on corresponding numerical control machine tool. Executive blade is multilayer when v, lead to reduce v layer dilute, should use lesser electric current to make short arc solder, increase transverse wobbly frequency. To prevent craze of blade v layer, warm-up of the knife that push tumour is answered to come before soldering 400 ℃ of 200 ℃ ～ ; Soldering in the process, every solder is over a few should undertake stress is handled elimination; The heat preservation in sweatbox should be put instantly after v of blade of the knife that push tumour is finished, have delay cold treatment next. After soldering to prevent, had been out of shape big, soldering answer to be press fitting of the knife that push tumour on appropriative tool in the process, make its to solder metabolic turns over direction to arise to be out of shape S(sees graph 5) beforehand, until after soldering, cool completely. The makes layer of v of alloy of cutter hub, cobalt radical make the crucial point with refractory steel knife pushing tumour that I develop 4 epilogue, via Qin Shenke the rail of use line for special use solders treatment carries out a proof, satisfy the integral performance requirement of K1000 rail welder completely, can replace an entrance completely to turn tumour knife. CNC Milling