V is in fork-lift truck advocate the application on knife plate

Wear away formal analysis fork-lift truck regards a kind of main project as machinery, its basically work bits of cubic meter of earth, arenaceous to seeming stone, coal, hard metal (for instance slag) etc. The abrasive of these types falls in pressure action, to bucket advocate knife plate undertakes microscopical cutting, arose to wear away namely. The information that feedbacks to the market again is analysed, conclude advocate knife plate basically wears away the form wears away for abrasive, still put in concussion to wear away when exercise chunk arenaceous stone next. 2.

Rupture the form analyses pair of fork-lift truck that produce on the market advocate of knife plate rupture the circumstance has observation, discovery ruptures area is from what solder to heat affects an area or cast blemish area to begin, be in advocate in knife plate use process, regular meeting begins to rupture from these fragile area, expand quickly next, cause advocate knife plate is fragile break. Through be opposite advocate process of knife plate production undertakes an analysis, fish causes advocate the ingredient that knife plate produces fragile section basically has: (1) advocate knife plate has cast blemish, when bucket is used incidental rupture. (The 2) influence because of the element such as work efficiency, field, advocate temperature of the warm-up when knife plate solders is insufficient or time of the heat preservation after solder is short wait for technology measure not to reach the designated position. (3) solders craft parameter is undeserved, hot input amount is too large, make solder overheat area is mechanical function drops quickly. Fork-lift truck is used undeserved, rise abruptly with individual bucket tooth merely especially when great weight stock, get power too concentration. 2, experiment process 1.

The choice of test data advocate knife plate base material chooses mechanical property the Q345 (16 Mn) of steel of low alloy structure with tall, good weldability. Basis advocate of knife plate wear away form and characteristic, our choice can bear to pound load certainly and the alloy of Cr - Mo - V of wear-resisting caustic fastens v welding rod material. The course searchs a data with all possible means, we chose material of 3 kinds of welding rod to have a test, it is D227 of welding rod of v of wear-resisting of city carry out, F W respectively, 4102 and the welding rod XM that improves on D227 alloy foundation, 6. 2.

V craft (① of the preparation before 1) v advocate knife plate groove needs to come out with planer machine treatment, treat v area surface not be patient of is oxidation skin, rustily, smeary wait for contamination. ② v needs stoving before welding rod solder, ℃ of 350 of ～ of stoving temperature 300, heat preservation 1h. When ③ v, use power source of straight solder drifting arc, use reversal sex to receive a standard. (① of point of 2) v craft to make v layer achieves best wear-resisting status, prevent wear-resisting layer alloying element transfers and attenuant, v divides a layer, every solder the 1 seeing a table such as track pitch of dimension of parameter, welding line, solder. ② asks whole v process undertakes continuously, shorten as far as possible every discontinuous time, in order to assure the temperature between the layer. Clear after solder of welding line of the line before ③ skin of coating, oxidation; If have the weld defects such as incomplete fusion, can undertake local solder fills, solder hind uses pearl powder or 6h of silicate heat preservation. Overall height of ④ v layer spends 5mm of 3 ～ , solder hind uses school of oil pressure machine to make the same score. 3, v effect is analysed 1.

Metallic analysis uses apply of v layer frit to read spectrometer to undertake to v layer metal chemical composition is analysed continuously, specific data sees watch 2. By the watch 2 can see, welding rod D227 and XM, 6 photographs to FW, 4102 basically be the Mn that decreased to be able to make frit apply metal machines sclerosis; At the same time opposite at FW, 4102 increased to be able to make with cast steel the Mo of aggrandizement of dispersion of frit apply metal and V. 2.

Sample wears away the analysis is right on experiment machine the frit apply metal of 3 kinds of v and test block of former cast steel undertake wearing away experimenting, wearability is measured through wear extent. According to bucket advocate object of knife plate exercise, choose 3 kinds of abrasive to undertake wearing away experimenting, it is thick corundum abrasive, fine Shi Shiying respectively sanded abrasive and thick river sanded abrasive, wear away time is 4h, the locomotive rate of experiment machine is constant. Wear away test result sees 5 of 4 of graph 3, graph, graph respectively, the basis is right of test block wear away analysis, the decision chooses XM, 6 v welding rod. 3.

Although cost analysis needs to be opposite before v advocate knife plate undertakes the makings below cut and machine are machined, but decreased advocate the heat preservation after knife plate and the warm-up before fighting body to solder and solder, so v advocate knife plate compares cast steel data still a lot of cheaper, and expect at cast steel material function rises greatly again relatively, reduced after service. Additional, will tell from cost, v advocate knife plate also material of excel former cast steel, express 3 be advocate cost of knife plate production is comparative. 4.

The welding rod XM that analysis of market feedback information uses make choice of, 6 make v material, first experiment 100 fork-lift truck, market survey undertook to experiment fork-lift truck after using 3 months. The result makes clear, after v advocate knife plate is mirrorred in the market good, wearability has before relatively very big rise, especially advocate knife plate ruptures the problem has been put an end to. 4, epilogue v advocate knife plate replaces cast steel advocate knife plate rose not only advocate the wearability of knife plate, and still from go up at all solved cast steel advocate the problem that knife plate ruptures, raised the performance characteristics of fork-lift truck. CNC Milling CNC Machining