CN104452500A - Track profiling grinding method - Google Patents

Abstract

The invention relates to the technical field of railway track maintenance, in particular to a track profiling grinding method. A track profiling grinder is arranged at the initial position, the track transverse section where the rotary axis of a grinding head of the grinder is located serves as a datum plane, a rectangular coordinate system is built, coordinate parameters of track profiles and the initial position parameters of the grinder are obtained by measurement, a track profile to be grinded is determined, the straight line, crossed with the datum plane, of the track profile to be grinded serves as a grinding tangent line, the grinding head of the grinder is moved until the rotary axis of the grinding head is perpendicular to the grinding tangent line, the grinding head of the grinder is driven to move in the radial direction of the rotary axis of the grinding head until the lower end face of the grinding head coincides with the grinding tangent line, and the grinding head of the grinder is driven to move along the track profile to be grinded to finish grinding of the track profile to be grinded. According to the track profiling grinding method, the grinding head of the grinder is moved according to the coordinate parameters until the rotary axis of the grinding head is perpendicular to the grinding tangent line, and the effect of adopting the end face of the grinding head for grinding when grinding of any angle is performed is achieved.

Description

A kind of track profiling polishing process

Technical field

The present invention relates to railroad track maintenance technology field, especially a kind of track profile polishing process.

Background technology

Along with the development of railway high speed and heavy duty, rail can produce the defects such as fatigue crack, fat edges and undulatory wear, can affect rolling stock traveling comfort and safety, and above-mentioned defect can be accelerated rail and lost efficacy simultaneously, brings larger economic loss.To rail carry out preventative and corrective maintenance be extend rail life, improve comfortableness, the requisite measure of economy and safety.At present, rail repair mode mainly contains the modes such as polishing, planing, milling and hand lapping, wherein, adopts efficient sander to carry out reparation application to rail the most general.

Current domestic conventional polishing process mainly contains various small-sized sander hand-guided polishing, bistrique is driven or driven by power by gasoline engine, efficiency is extremely low, can only be used on a small scale, track repair among a small circle, in profile copying technology, on original track, by mechanical rollers and rail level, (this rail level neither standard rail level, but band defect rail level) contact profiling, add and manually adjust stock removal, grinding face cannot accomplish specification, standard, and human factor is a lot.

Domestic polishing process comparatively advanced at present adopts external hydraulically powered polishing locomotive to polish, and be greatly improved, but this polishing process has certain defect in the profile copying technology of rail level at grinding efficiency.In existing polishing process, what profiling adopted is hydraulically, bistrique is pressed to track, keep emery wheel and track to have certain pressure, ensure grinding force, but weak to the abrasion homogenization of wave to approach rail, namely still cutting is had at trough place, secondly the profiling of rail level is also realized by hydraulic pressure, so grinding face cannot accomplish specification, standard.

Summary of the invention

1. invent the technical problem that will solve

The present invention aims to provide a kind of multi-section track profiling polishing process, thus realizes more even, stable contact surface polishing to track.

2. technical scheme

A kind of track profiling polishing process of the present invention, specifically comprises the steps:

Step 1, track profiling sander is placed in initial position, with the track cross section at burnishing-head of burnishing machine pivot center place for reference plane, sets up rectangular coordinate system, measure and obtain rail type areal coordinate parameter;

Step 2, measurement obtain track profiling sander initial position parameters;

The coordinate parameters of step 3, measurement track profiling sander, note burnishing-head of burnishing machine is Q point in the axle center that reference plane inner periphery swings, and record Q point initial position co-ordinates, is designated as Q ₀;

Step 4, determine to treat polishing orbit profile, to treat that the polishing orbit profile straight line crossing with reference plane is for polishing tangent line, polishing tangent line is tangential on point of contact Z with track, remembers that the coordinate of point of contact Z is Z ₁, remember that folded by polishing tangent line and horizontal plane, acute angle is β;

Step 5, portable grinder bistrique, to bistrique rotation and polishing tangent line upright position;

Step 6, driving burnishing-head of burnishing machine move radially along bistrique rotating shaft and overlap with polishing tangent line to bistrique lower surface;

Step 7, driving burnishing-head of burnishing machine, along treating that polishing orbit profile is moved, complete the polishing treating polishing orbit profile;

Step 8, employing generating are polished one by one to rail type face, repeat step 4 ~ 7, complete track profiling polishing.

Above-mentioned track profiling polishing process, further, in described step 3, note sander fixed center point is P point, and the coordinate parameters of track profiling sander also comprises P point coordinates, is arranged on directly over rail center by P point.

Above-mentioned track profiling polishing process, further, in described step 5, the method for portable grinder bistrique is specially and comprises the following steps,

Step 5.1, perpendicular to polishing tangent line straight line on get operating point, Q point position when working as sander, operating point coordinate is designated as Q ₁, then Q ₁with Z ₁line with polishing tangent line vertical;

Step 5.2, calculating Q ₁with Z ₁between air line distance, be designated as F, another F ₀≤ F≤(F ₀+ Fx), F ₀for the minimum spacing of burnishing-head of burnishing machine and Q point, to be that burnishing-head of burnishing machine is maximum feed distance to Fx;

Step 5.3, two forks are set between P point and Q point, first fork link is arranged on P point, free end is designated as M point, and the first oscillating bar length is L1, and the second fork link is arranged on Q point, free end is designated as N point, second oscillating bar length is L2, and the first fork is connected by connecting rod with the free end of the second fork, and length of connecting rod is L, second fork is relative with burnishing-head of burnishing machine to be fixedly connected with, and remembers that folded by the second fork and burnishing-head of burnishing machine rotating shaft, acute angle is α;

Step 5.4, according to Q ₁calculate the first fork free end coordinate M when obtaining sander work ₁with the second fork free end coordinate N ₁;

Step 5.5, drive the first fork and the second fork to turn to operating position, portable grinder bistrique is complete.

3. beneficial effect

1, profiling polishing process of the present invention, set up xOy coordinate system, according to coordinate parameters portable grinder bistrique, vertical with polishing tangent line to bistrique rotation, in bruting process, be no matter the upper surface of polishing orbit, or the medial surface of track, because bistrique rotation is vertical with polishing tangent line, the effect of the polishing all adopting bistrique end face to carry out when realizing arbitrarily angled polishing.When the grinding head grinding wheel of sander grinding and feeding driving box driver plate shape rotates polishing, during polishing, the reaction force of pressure is perpendicular to discoidal bistrique end face, be bistrique be stressed along rotor shaft direction, even if apply the pressure strengthened, the motor part also can not rotated impact.

2, profiling polishing process of the present invention, use wheel grinding, the depth of cut is quite small, generally at 0.4-0.05mm, therefore swing link transmission is adopted, by swing arm driving mode, thus realize the grinding head depth of cut and accurately control, swing arm polishing structural volume is little, lightweight, supporting capacity is large, and control accuracy is high, is easy to dock with digital control system.

3, profiling polishing process of the present invention, profiling polishing better effects if.During polishing, sander fixed center point (P point) is arranged on directly over rail center (0 point), therefore, during profiling polishing, grinding head and sander fixed center realize staggering in vertical direction, and overall fixed mechanism forms certain bias.When carrying out sander polishing according to method of the present invention, during the polishing of grinding head high-speed rotation, whole mechanism is that one direction is stressed all the time, the center of rotation of grinding head is departed from the center of gravity position of sander Feed servo system unit, thus solves the problem that vibrations cause mechanism-trouble, polishing weak effect.

Accompanying drawing explanation

Fig. 1 is the specific embodiment principle schematic of the inventive method.

Detailed description of the invention

Embodiment 1

Below in conjunction with accompanying drawing, method of the present invention is illustrated.

Step 1, track profiling sander is placed in initial position, with the track cross section at burnishing-head of burnishing machine 4 pivot center place for reference plane, sets up rectangular coordinate system, measure and obtain rail type areal coordinate parameter, in the present embodiment, with track bottom center's point for initial point, set up x0y rectangular coordinate system.

Step 2, measurement obtain track profiling sander initial position parameters; Note sander fixed center point is P point, and the coordinate parameters of track profiling sander also comprises P point coordinates, is arranged on directly over rail center by P point, then P point coordinates is (0, Yp).

The coordinate parameters of step 3, measurement track profiling sander, note burnishing-head of burnishing machine 4 is Q point in the axle center that reference plane inner periphery swings, and record Q point initial position co-ordinates, is designated as Q ₀(Xq ₀, Yq ₀).

Step 4, determine to treat polishing orbit profile, to treat that the polishing orbit profile straight line crossing with reference plane is for polishing tangent line, polishing tangent line is tangential on point of contact Z with track, remembers that the coordinate of point of contact Z is Z ₁(Xz ₁, Yz ₁), remember that folded by polishing tangent line and horizontal plane, acute angle is β, the β angle namely in Fig. 1.

Step 5, portable grinder bistrique 4, to bistrique rotation and polishing tangent line upright position, the method for portable grinder bistrique 4 is specially and comprises the following steps.

Step 5.1, perpendicular to polishing tangent line straight line on get operating point, Q point position when working as sander, operating point coordinate is designated as Q ₁(Xq ₁, Yq ₁), Q ₁with Z ₁line with polishing tangent line vertical.

Step 5.2, calculating Q ₁with Z ₁between air line distance, be designated as F, another F ₀≤ F≤(F ₀+ Fx), F ₀for burnishing-head of burnishing machine 4 and the minimum spacing of Q point, to be that burnishing-head of burnishing machine 4 is maximum feed distance to Fx.

Step 5.3, between P point and Q point, arrange two forks, the first fork 6 link is arranged on P point, and coordinate is (0, Yp), and free end is designated as M point, and the first fork 6 length is L1; Second fork 8 link is arranged on Q point, free end is designated as N point, second fork 8 length is L2, first fork 6 is connected by connecting rod 7 with the free end of the second fork 8, connecting rod 7 length is L3, second fork 8 is relative with burnishing-head of burnishing machine 4 to be fixedly connected with, and remembers that the second fork 8 is α with acute angle folded by burnishing-head of burnishing machine 4 rotating shaft, the α angle namely in Fig. 1.

Step 5.4, according to Q ₁calculate the first fork free end coordinate M when obtaining sander work ₁with the second fork free end coordinate N ₁.

Concrete computational process and formula as follows:

$\∠\mathrm{ZPQ}=\arctan \left(\frac{{\mathrm{Xq}}_1}{\mathrm{Yp}-{\mathrm{Yq}}_1}\right).$

∠ NQP=alpha-beta-∠ ZPQ, and NQ length is L2, the abscissa of known N1 is Xq ₁-L2*sin (∠ NQP), N ₁ordinate be Yq ₁+ L2*cos (∠ NQP).

PN ₁between length L _pN1=(Xq ₁-L2*sin (∠ NQP)) ²+ (Yp-Yq ₁-L2*cos (∠ NQP)) ².

Can try to achieve according to the cosine law, $\∠P{N}_1{M}_1=\arccos \left(\frac{{L_3}^2+{L_{\mathrm{PN}1}}^2-{L_1}^2}{2\×L_3\×L_{\mathrm{PN}1}}\right).$

Note N ₁intersection point in Y-axis is N ₁₀, then

$\∠P{N}_1{N}_{10}=\arctan \left(\frac{|\mathrm{Yp}-Y{q}_1-L2*\cos (\∠\mathrm{NQP})|}{|{\mathrm{Xq}}_1-L2*\sin (\∠\mathrm{NQP})|}\right).$

∠ M ₁n ₁n ₁₀=∠ PN ₁n ₁₀-∠ PN ₁m ₁, then the horizontal range between M1 and N1 is L3*cos (∠ M ₁n ₁n ₁₀), M ₁with N ₁between vertical distance be L3*sin (∠ M ₁n ₁n ₁₀), known M ₁abscissa be Xq ₁-L2*sin (∠ NQP)+L3*cos (∠ M ₁n ₁n ₁₀), N ₁ordinate be Yq ₁+ L2*cos (∠ NQP)+L3*sin (∠ M ₁n ₁n ₁₀).

Step 5.5, the M obtained according to step 5.4 calculating ₁and N ₁coordinate, the first fork 6 and the second fork 8 can be driven to turn to corresponding operating position, and portable grinder bistrique 4 is complete.

Step 6, driving burnishing-head of burnishing machine 4 move radially along bistrique rotating shaft and overlap with polishing tangent line to bistrique lower surface; In the present embodiment, employing be servomotor 1 by screw nut driven structure 3 drive burnishing-head of burnishing machine 4 linearly guide rail 2 move to the lower surface of burnishing-head of burnishing machine 4 and track 5 profile to be polished is contacted with point of contact Z.

Step 7, driving burnishing-head of burnishing machine 4, along treating that polishing orbit profile is moved, complete the polishing treating polishing orbit profile;

Step 8, employing generating are polished one by one to rail type face, repeat step 4 ~ 7, complete track profiling polishing.

Schematically above be described the present invention and embodiment thereof, this description does not have restricted, and also just one of the embodiments of the present invention shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the invention aim, designing the frame mode similar to this technical scheme and embodiment without creationary, all should protection scope of the present invention be belonged to.

Claims (3)

1. a track profiling polishing process, is characterized in that comprising the steps:

Step 1, track profiling sander is placed in initial position, with the track cross section at burnishing-head of burnishing machine pivot center place for reference plane, sets up rectangular coordinate system, measure and obtain rail type areal coordinate parameter;

Step 2, measurement obtain track profiling sander initial position parameters;

The coordinate parameters of step 3, measurement track profiling sander, note burnishing-head of burnishing machine is Q point in the axle center that reference plane inner periphery swings, and record Q point initial position co-ordinates, is designated as Q ₀;

Step 4, determine to treat polishing orbit profile, to treat that the polishing orbit profile straight line crossing with reference plane is for polishing tangent line, polishing tangent line is tangential on point of contact Z with track, remembers that the coordinate of point of contact Z is Z ₁, remember that folded by polishing tangent line and horizontal plane, acute angle is β;

Step 5, portable grinder bistrique, to bistrique rotation and polishing tangent line upright position;

Step 6, driving burnishing-head of burnishing machine move radially along bistrique rotating shaft and overlap with polishing tangent line to bistrique lower surface;

Step 7, driving burnishing-head of burnishing machine, along treating that polishing orbit profile is moved, complete the polishing treating polishing orbit profile;

Step 8, employing generating are polished one by one to rail type face, repeat step 4 ~ 7, complete track profiling polishing.

2. track profiling polishing process according to claim 1, is characterized in that: in described step 3, and note sander fixed center point is P point, and the coordinate parameters of track profiling sander also comprises P point coordinates, is arranged on directly over rail center by P point.

3. track profiling polishing process according to claim 2, it is characterized in that: in described step 5, the method for portable grinder bistrique is specially and comprises the following steps,

Step 5.1, perpendicular to polishing tangent line straight line on get operating point, Q point position when working as sander, operating point coordinate is designated as Q ₁, then Q ₁with Z ₁line with polishing tangent line vertical;

Step 5.2, calculating Q ₁with Z ₁between air line distance, be designated as F, another F ₀≤ F≤(F ₀+ Fx), F ₀for the minimum spacing of burnishing-head of burnishing machine and Q point, to be that burnishing-head of burnishing machine is maximum feed distance to Fx;

Step 5.3, two forks are set between P point and Q point, first fork link is arranged on P point, free end is designated as M point, and the first oscillating bar length is L1, and the second fork link is arranged on Q point, free end is designated as N point, second oscillating bar length is L2, and the first fork is connected by connecting rod with the free end of the second fork, and length of connecting rod is L, second fork is relative with burnishing-head of burnishing machine to be fixedly connected with, and remembers that folded by the second fork and burnishing-head of burnishing machine rotating shaft, acute angle is α;

Step 5.4, according to Q ₁calculate the first fork free end coordinate M when obtaining sander work ₁with the second fork free end coordinate N ₁;

Step 5.5, drive the first fork and the second fork to turn to operating position, portable grinder bistrique is complete.