Xuan of wheel pair grade is in hydraulic pressure copy do not fall round of application on lathe

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Summary: The article is brief described hydraulic pressure copy model working principle is not falling round of application in lathe, introduced not to fall the working principle that round of lathe copy system uses at machining train wheel pair, the issue that be in is put in summing up copy system to be repaired in wheel pair Xuan according to the practical experience in the job, be aimed at in hydraulic pressure copy model do not fall round of viewpoint that grade Xuan realized to put forward his on lathe. Keyword: Hydraulic pressure copy; Do not fall round of lathe; The Underfloor Wheel Lathe that a line introduced subway of long Guangzhou of wheel pair Xuan to be made by German Hegenscheidt company (do not fall round of lathe) , basically use at the rehabilitate of tread of car wheel pair, its cutting device is according to hydraulic pressure copy principle design. Copy of 1 hydraulic pressure principle does not fall the copy of round of lathe part is comprised by the hydraulic pressure crock of an a fore-and-aft hydraulic pressure crock, perpendicular direction, copy pattern plate, copy head, cutting tool. The structure if (graph 1) be shown: Among them the control part that copy head is copy treatment. It by: Belt explore board copy head (1) , feedback device (2) , hydraulic pressure a powerful person (3) composition. The structure if (graph 2) be shown: From (graph 1) can seeing copy head and cutting tool is one to one correspondence relation, it decides the position of rest of cutting tool, the different treatment area that defines double knife bead to go up in wheel pair. The contrail that copy head has walked along on pattern plate determines the treatment course of cutting tool, make knife bead the wheel pair of appearance rehabilitate tatty according to pattern plate. Explore board (4) dimension decided to be machined the flange dimension of wheel pair, the flange ply that makes treatment goes out is 32 (Mm) . The working principle of hydraulic pressure of whole copy system if (graph 3) be shown, copy control by hydraulic pressure, answer fast, precision is taller, after Xuan is repaired, can make sure dimension of or so wheel pair is in ± 0.

5 (Mm) inside. A powerful person of Nextpage 　 electromagnetism (3) report opens, the hydraulic pressure oil that discharges from hydraulic pump passes scale flow valve (2) enter crock of perpendicular hydraulic pressure (Ⅰ ) (B) antrum and crock of fore-and-aft hydraulic pressure (Ⅱ ) (A) antrum. Right now as a result of pressure valve (4) limitation, hydraulic pressure oil stays in crock of fore-and-aft hydraulic pressure (Ⅱ ) (A) antrum, make crock of fore-and-aft hydraulic pressure cannot move. Copy pattern plate (6) Xiang Fang head (5) mobile. When bring into contact with of copy pattern plate copy head, the force plunger of copy head the position a powerful person from (A) arrive to push (0) . In hydraulic pressure crock (Ⅰ ) (A) the hydraulic pressure oil in antrum is absent pour out of. Perpendicular course suspends campaign. In join crock of perpendicular hydraulic pressure (Ⅰ ) (B) antrum and crock of fore-and-aft hydraulic pressure (Ⅱ ) (A) the pressure of vitta increases between antrum. Pressure a powerful person is reached in oil pressure (4) when the pressure of set is worth, a powerful person is opened. In crock of fore-and-aft hydraulic pressure (Ⅱ ) (B) the hydraulic pressure oil in antrum carries a powerful person (4) flow into gasoline tank, fore-and-aft course begins inward campaign, as a result of the addition of pattern plate gradient, make force plunger moves the position of a powerful person (B) , make hydraulic pressure oil flows into crock of perpendicular hydraulic pressure (Ⅰ ) (A) antrum. The pressure of both sides of crock of perpendicular hydraulic pressure is right now poor, assure tool carrier to move backward according to the gradient stability of pattern plate, the union of two kinds of motion, make cutting tool moves according to the appearance of pattern plate, achieve Xuan to cut the end of wheel pair thereby. Wheel pair of Xuan of grade of 2 wheel pair basically is put in two kinds to wear away, it is tread wears away, 2 it is flange wears away (basically be the wear and tear that points to flange ply) . Current, guangzhou subway statistic of actual wear and tear is wheel pair of car of a line of flange ply wear away want those who compare tread diameter to wear away fast. And the flange ply standard in operation is not less than 26mm, be less than 26mm when flange ply namely when, be about to undertake Xuan annulus restores standard 32mm. The experience formula that measures according to flange wear extent and tread diameter cutting concerns: Wear extent of flange of ≈ of quantity of tread diameter cutting × (4.

5~5.

5) (Mm) 　 can see: Flange ply did not restore 1mm, xuan wants to cut in tread diameter direction 4.

5~5.

5mm, this is existing diametical cutting amount is large, use up fast, the problem with the low utilization rate of wheel pair. Optimal circumstance is to be in while flange wears away to be restricted, tread also wears away to be restricted, wheel pair utilization rate is high, changing wheel pair just is the most scientific. Lathe produces business to consider to use " flange ply to decrease the technology that thin technology " has enormous economic benefits this, use numerical control technology to improve lathe, according to the actual condition of flange ply, choose different flange ply to undertake Xuan is repaired neatly, make full use of the relation of flange ply and tread, as far as possible reduce wheel Xuan to cut an amount. Such, the comprehensive measure index that assured flange already can make full use of again at the same time the deadline of wear and tear of flange and tread, the Xuan of direction of diameter of tread of the wheel when reducing Xuan annulus cuts an amount, can increase a wheel but Xuan annulus frequency, prolong the service life of wheel pair. According to the watch the specification of 1, can see use grade Xuan to repair, in wear away likewise below, achieve different flange ply 26, 28, 30, 4 32 grade, cutting amount is different, with flange ply 32 (Mm) for exemple, flange ply rehabilitate arrives 32 (Mm) , diameter cutting 28 (Mm) , lowered the utilization rate of wheel pair, economic benefits is poor. Be aimed at this problem, according to Guangzhou subway actual condition, make the pattern plate that makes different flange ply, the grade Xuan that realizes wheel pair is repaired. Xuan of grade of 3 wheel pair is in hydraulic pressure copy do not fall if round of implementation method on lathe is used is numerical control lathe, can revise flange ply from software directly, realized grade Xuan conveniently, still can improve treatment efficiency at the same time. A line does not fall round of lathe for hydraulic pressure copy lathe, it and numerical control do not fall round of lathe is different, numerical control lathe generates the wheel outline that grade Xuan writes automatically according to flange ply, and the copy of a line lathe can be repaired according to pattern plate Xuan only, cannot realize grade Xuan directly. To make a line does not fall round of lathe also can realize grade Xuan, be about to design line of mark of accord with syncretic the pattern plate that the flange ply of actual condition differs for 28mm, 30mm, achieve the goal of Xuan of wheel pair grade. (graph 5) . Carry the article elaborate realise, existence of hydraulic pressure copy system is answered fast, treatment precision is advanced advantage, but also exist copy pattern plate is onefold, machine single defect. Be aimed at Guangzhou subway the actual condition of a line, article design gave appropriate copy pattern plate, with hydraulic pressure copy model do not fall round of lathe realized grade Xuan, make every wheel pair OK lengthen use course of development nearly 300 thousand kilometer, have very big practical with economy. CNC Milling CNC Machining