Method to determine value and direction of deformations of vehicle damaged body at straightening out works
FIELD: mechanical engineering; repair of vehicles.
SUBSTANCE: vehicle with damage body is lifted to preset height relative to floor, and check points on body are chosen. Part of points are arranged of sound part of body. Additional check point is marked on floor under bottom of body. Said point should be located at a distance from bottom not less than one fourth of maximum distance between chosen check points. Distances between all check points are measured, and basing on obtained data, three coordinates of all chosen check points are calculated by computer with determination of distribution of said check points in space. Then, by turning, check points of damage body are registered with similar check points in computer data base belonging to body of standard vehicle. Distribution of check points received in measurement is compared with distribution of check points in standard vehicle and, basing on results of measurement, value and direction of deformations of damaged body are determined.
EFFECT: simplified method at preservation of high accuracy of determination of deformations.
1 ex, 3 tbl, 2 dwg
The invention relates to mechanical engineering and can be used in the repair of vehicles at service stations vehicle to determine the nature of deformation of the vehicle.
The known method of controlling the position of points of a body of the vehicle, lying in the same plane, which measure the positions of the points of the deformed body of the car using linear measures of length: tape measure, rulers, calipers and measure distances between points determine the position of points of the body, and the magnitude and direction of deformation of the car body (1).
The disadvantage of this method is the impossibility of obtaining a three-dimensional configuration of points, which reduces the information content of the measurement results, performance and increases the labor costs for the repair of the strain of vehicle.
The known method of controlling the position of points of a body of the vehicle, implemented in the device for controlling the position of the points of the deformed body of the car. This method provides a measure of the position of the control points by using a rotary sensors, frame established by intersecting the axes of the roller and inextensible filaments, one end of which is fixed to the roller, and the other at the control point of the body. Sensors continuously transmit in computer information o n the Board and the length of the elongated filament. Each measured element conveys information about the three coordinates of a single point of the body from a number of controlled reference system associated with the measuring element. Measuring element specifies the coordinates of the points in the spherical coordinate system (2).
The disadvantage of this method is the complexity of the necessity of using a large number of measuring elements and as a consequence of the high cost of equipment for controlling the position of points of a body of the vehicle.
Closest to the invention is a method of controlling the position of points of a body of the vehicle, which define the distance between two measuring elements, which use the laser emitters of the type installed on the matrix and connected to the sensors of rotation in two planes. Bring both beam on one reference point of the body, mentally projecting it on the horizontal plane, build a virtual pyramid, determine the angle between one of the beams and its projection on the horizontal plane and the angle between the projections on the horizontal plane and determine the spatial coordinates of a given point of the body in the given coordinate system. Then put both of the beam at the second point of the body and determine the spatial coordinates of the second point of the body similarly p is pout point, define the distance between two points in three dimensions, which are compared to the reference size. According to the results of the comparisons determine the position of points of the body and this status is determined by the nature of the deformation of the car body (3).
The disadvantage of this method is its complexity due to the use for measuring the coordinates of control points of a special matrix for fastening the measuring elements, and the low accuracy of determining the position of points due to the complexity of visual coincidence of the two beams.
The technical result of the invention is to simplify the method of determining the magnitude and direction of deformation of the damaged body of the vehicle when editing while maintaining the high accuracy of determining the position of points.
This result is achieved in that in the method of determining the magnitude and direction of deformation of the damaged body of the vehicle when editing the vehicle is lifted to a predetermined height relative to the floor, choose control points, some of which are located on the undamaged portion of the underbody of the car body on the floor celebrate an additional control point spaced from the bottom at a distance of not less than one-fourth the maximum distance between control points, measure the distance between all the completed points, enter the values of the measured distances in the database of the computer on which basis by computing the computer unit calculates the three coordinates of all selected control points relative to a given coordinate system, and determine the distribution of these control points in space, by turning combine the obtained distribution of the control points of the body of the vehicle stored in the computer database of the distribution is similar to checkpoint the reference vehicle, compare the distribution of the control points of the body of the vehicle with the distribution of control points of the reference vehicle and the results of the comparison determine the magnitude and direction of deformation of the body of the vehicle.
The possibility of the method of determining the position of points of a body of a vehicle consider the example of determining the position of points of the deformed body of the car.
Figure 1 presents the distribution of the control points of a body in the reference vehicle, stored in the computer database.
Figure 2 - spatial distribution of selected control points in the deformed body of the car.
According to this invention a method of determining the nature on the formation of the body of the car is as follows.
Set the vehicle on a hoist or special stocks. Raise the vehicle to a predetermined height above the floor. Based on the nature of the deformity, choose a reference point on the bottom of the deformed body of the vehicle from the number of control points 1-21 and 11-211listed in the database of the computer (figure 1). Some of them not less than 3 - opt on the undamaged portion of the vehicle body for spatial reference points of the deformed body of the vehicle to the position of the points of a body in the reference vehicle, information of which is stored in the computer database.
Note on the floor under the bottom of the deformed body of the vehicle an additional control point 22. An additional point is chosen at a distance from the bottom of the deformed body of the vehicle not less than one-fourth the maximum distance between the control points of the deformed body of the car.
With the help of measuring tools, such as electronic telescopic line with the probes on the ends, measure all mutual distances between the selected control points. The measurement results are entered into the computer, to avoid error, it is possible with manual input, it is better to use the direct transfer of data from the meter to the computer for example via a cable or radio.
You run hiliterow procedure for finding the three-dimensional distribution of control points in space in accordance with one of the known methods, for example, in accordance with the method of gradient descent (Kalitkin NN. Numerical methods. M.: Nauka, 1978). As a first approximation in the mathematical model in Cartesian coordinates define the "ideal" control points taken from the database of the computer. The program then starts a cyclic traversal of all points of the mathematical model, in turn, for the sample by changing the coordinates of each point on the small size. After each change of coordinates of control points of the mathematical model compares all actually measured distances and the corresponding distances calculated by the points of the mathematical model, and calculates the error. If in the course of the trial displacement of this point, the total error is reduced, this displacement is fixed. If the error has increased, the displacement is performed in the opposite direction. Then moves to the next control point mathematical models, etc. Bypassing all points is repeated until such time as calculated by the model of distance does not coincide with the actually measured. Obtained in this configuration points to be identical in shape to the configuration of the points measured on the model, but can be located in space arbitrarily. Therefore, it is necessary to rotate and align with the reference configuration so that the control points of the body intact h is STI car coincided with the reference as it is possible more precisely.
Obtained the actual location of the control points in space is compared with a reference and the position of the points is determined by the magnitude and direction of deformation of the body.
As an example, the above method of determining the nature of the deformity was conducted with the use of the car HONDA SHUTTLE CR-V, which is mounted on the frame at a predetermined height from the floor.
Figure 1 presents the distribution stored in the computer database.
In the database presents the distribution of control points 1-21 body base reference specified car brand in the right pane (figure 1). Similar control points are located in the left part of the car body. Suppose that damaged the front part of the body to the left. Opt for measurements checkpoint 3, 12, 15 on the right side of the body and similar point 3', 12', 15'. When this right points 3, 12, 15 and left point 12', 15' is selected on the undamaged portion of the vehicle body, and the left point of the 3' to the damaged front of the body.
From the database were obtained three-dimensional coordinates of these points on the Cartesian coordinate system, which are summarized in table 1.
In accordance discussed above under the car at a distance of about 1 meter was on the floor marked with additional control point 22 (figure 2).
Were measured distances between all the above control points, the measurement results are listed in table 2.
On the basis of these measured distances between the control points using the method of gradient descent" were calculated real coordinates all seven control points with respect to the selected Cartesian coordinate system X, Y, Z, and the obtained three-dimensional distribution of the control points of the deformed body of the car, which was rotated so that the four selected control point 12, 15 and 12', 15' better coincided with similar reference points the reference vehicle (figure 1). This has resulted in the following coordinates of the specified points of the deformed car listed in table 3.
From table 3 it can be seen that the checkpoint 3, 12, 12', 15, 15', located on the undamaged part of the body deformed cars, managed to combine with the control points of the reference vehicle with an accuracy of 1 mm, and the problematic point 3', located on the deformed part of the body of the car has deviated from its true location back to the value 2732-2650=82 mm and to the right by the amount 500-450=50 mm, the Deviation of the Z-axis, i.e. vertically in this example did not happen, because the change of the Z-coordinates of 1 mm is placed in measurement errors.
On the basis of the results obtained decides in which direction and with what force should edit the damage of the car body.
This example allows you to ensure that to determine the nature of deformation of the car body does not require any additional means for obtaining three-dimensional distribution of the control points of the deformed body of the vehicle, while ensuring a sufficiently high accuracy in the op is edelenyi nature of the injury, that reduces the labor involved in carrying out edits the body of the car.
Sources of information
1. Acceptance, repair and production of car body repairs cars enterprises repair shop". RD 37.009.024-92, 1992, Moscow, JSC avtoselhozmash-holding.
2. Copyright certificate EN 1706742 A2, IPC 7 21D 1/12, publ. 23.01.2002.
3. Patent RU 2239505 C1, IPC 7 21D 1/12, publ. 10.11.2004.
The method of determining the magnitude and direction of deformation of the damaged body of the vehicle when dressing, characterized in that the vehicle with damaged body raised to a predetermined height relative to the floor, choose a reference point on his body, part of which is located on the undamaged portion of the underbody of the car body on the floor celebrate an additional control point spaced from the bottom at a distance of not less than one-fourth the maximum distance between control points, measure the distance between all control points, put the values of the measured distances in the database of the computer on which basis by computing the computer unit calculates the three coordinates of all selected the control points relative to a given coordinate system, and determine the distribution of these control points in space, by turning combine the received distributed the e checkpoint damaged body stored in the computer database of the distribution is similar to the control points of a body in the reference vehicle, compare the distribution of the control points of the damaged body with the distribution of the control points of a body in the reference vehicle and the results of the comparison determine the magnitude and direction of deformation of the damaged body.
FIELD: the invention refers to control of the state for example of textile materials at their interaction with working parts of technological equipment.
SUBSTANCE: the essence is in scanning the surface of the moving material with the aid of the sensitive element of a piezo-converter. The average value of the current linear sizes of the structural elements are calculated according to the number of the impulses generated by a piezo-converter and defined by the quantity of the elements of the structure (for example by the number of weave units) on the reference length of the part of the moving object. Periodically the received results are compared with the corresponding starting data of the structure of the rigid part of the material.
EFFECT: increases accuracy of the evaluation of the strain-deformed state of the moving easily deformed materials of a grid-type structure with simultaneous simplification of technical realization.
2 cl, 3 dwg
FIELD: transport engineering.
SUBSTANCE: invention relates to self-contained devices for displacement of vehicles. Proposed tipper includes post, platform for vehicle installed for turning in vertical plane and platform lock. Tipper is furnished with non-straight-line guides installed on post which is provided with wheels arranged in vertical plane perpendicular to side of vehicle entry, and power complex to move tipper. Platform contains stationary and movable counterweights, detachable movable and fixed stops for vehicle and speed regulator connected with ground surface or with part of tipper which does not turn together with platform. Platform is connected by flexible coupling with guide. Speed regulator can be made in form of friction brake or anchor mechanism.
EFFECT: reduced cost of device, simplified servicing and repair, improved consumer properties.
3 cl, 3 dwg
FIELD: operation of hardware, possible use for determining how structural features of hardware influence its safety and reliability under operational conditions.
SUBSTANCE: in accordance to the invention, bank of structural, operational and technological unit characteristics as well as bank of structural, operational and technological unit characteristic signs are provided. To first of aforementioned banks, a block for comparing how structural, operational and technological characteristics of units influence safety of hardware, is connected. Block for computing characteristics priority vector of each unit for determining weight of their influence in safety of hardware operation is installed with possible interaction with comparison block and connected to block for determining for determining ratio of compliance of expert estimations for creating vector of unit characteristics priorities. Block for determining strategy of technical maintenance in terms of increasing safety and efficiency of usage of hardware is installed with possible receipt of data from bank of signs of structural, operational and technical characteristics of units and vector of priorities of characteristics of units from block for determining compliance ratio. Block for determining numerical value of unit characteristics signs is connected to block for determining strategy of technical maintenance and made with possible determining of technical maintenance strategy in terms of all characteristics of hardware units with consideration of their priority and weight. Block for selecting value of relative coefficient of unit characteristics is installed with possible receipt of data from block for determining numerical value of unit characteristic signs based on results of selected value of relative unit characteristics coefficient.
EFFECT: increased hardware operation safety.
FIELD: mechanical engineering.
SUBSTANCE: proposed installation for assembling and disassembling of protective device contains base with fitted-on housing, working table with appliance for fixed arrangement of protective device, hydraulic cylinder with hydraulic drive, and control panel. Hydraulic cylinder is mounted in base and is connected with working table. Housing is formed by side posts connected with upper part and is provided with additional table with fixing unit for fastening rigging for longitudinal displacement of device shoes at assembling. Hole made in additional table to pass appliances for action onto cone of device at its assembling, and appliances with magnets for turning the cone and its removal at disassembling. Table are arranged coaxially relative to each other between side posts, and coaxial holes are made in side posts being arranged in pairs under each other for fixed arrangement of additional table at their level and regulated change of distance between additional and working tables.
EFFECT: improved convenience of assembling-disassembling of protective device, simplified design of installation.
FIELD: transport engineering.
SUBSTANCE: invention can be used for locking a vehicle. Proposed wheel lock is assembled of two parts mated to each other and having rectangle in base and sides forming triangle. Slot is made in one part, and projection is made in other and rotating members are installed on top of each part.
EFFECT: simplified design, process of manufacture and usage.
2 cl, 2 dwg
FIELD: transport engineering; measuring and checking facilities.
SUBSTANCE: invention relates to measuring of residual deformation of vehicle body after road accident. Proposed device contains contactless analog distance pickups and thickness measuring pickup. Distance pickups are arranged on bracket displaced in vertical and horizontal planes. Device contains also mount on end of which pickup of ultrasonic precision thickness gauge is found. Use of proposed device reduces labor input in measuring deformation of surfaces of complex form which makes it possible to carry out operative checking at place of road accident for estimating its causes, determining initial speeds of collision of vehicle with other vehicle or obstacle, and evaluating shock and strength properties of vehicle bodies.
EFFECT: reduced labor input in checking deformation of vehicle bodies after collision.
2 cl, 2 dwg
FIELD: railway transport; repair of rail vehicle bogies.
SUBSTANCE: to press axle-box liner to support surface of side frame use is made of spring-loaded pressure plate attached to lower plate of presser. Preliminary curving of laps of liner is done by frames rigidly attached to upper plate of pressure. Aligning of axes of symmetry of device and support surface of side frame at mounting in axle-box aperture is provided automatically by use of two catchers secured on front and rear walls of housing being essentially two pairs of levers with two pairs of pawls. Levers of each pair are intercoupled and their working surfaces are closed by action of spring, distance between them being less than width of guide of axle box. Fastening of device in axle-box aperture is provided by two pairs of grips. At beginning of downwards movement of presser, grips close around side frame and they remain closed during downward movement of presser. After completion of upsetting of liner, with presser moving upwards, pins on end section of shaped slot act onto grips moving them apart releasing side frame from device. To level up forces between holdowns at upsetting of liner, the hold-downs are provided with inserts made of elastic material secured by bolts between replaceable working plates and hold-downs.
EFFECT: increased capacity and improved quality of repair of bogie side frames.
FIELD: transport engineering; filling stations.
SUBSTANCE: proposed automobile fuel filling station contains technological system including filler stand pipe with quick-release sealed couplings and flexible hoses, valve connecting delivery and gas-return pipeline with valve, pipeline to deliver fuel from storage reservoir into filler stand pipe, closed system for filling fuel into fuel servicing truck, system for deaeration and recirculation of forced out fuel fumes from fuel servicing tank into storage reservoir with gas-return-pipeline, system for step-by-step dispensing of fuel at beginning and at end of fuel delivery, set of sensors providing controllable filling of fuel into fuel servicing tank, electric circuit, fuel servicing tank grounding check system, fuel fumes concentration automatic control system for checking amount of fuel fumes in free space of wells and shafts of reservoir, complex for checking capacity of deaeration and recirculation system, system for measuring fuel level, system to prevent combination of draining and filling operations, system for preliminary checking fuel servicing tank to be filled for presence of fuel, system to prevent overfilling of fuel servicing tank in process of filling with provision of automatic cutoff of fuel delivery, and manual delivery switch of diesel fuel.
EFFECT: provision of filling trucks and passenger cars at one filling station, filling of reservoirs of small-size fuel servicing trucks.
2 cl, 2 dwg
FIELD: railway transport; repairs.
SUBSTANCE: method of optimum assembling of friction set of bogie, Model 18-100, when putting out cars after scheduled repair includes measuring of distance between friction strips of side frames, determining completeness of overspring beams and mounting of friction wedges. Friction wedges are subdivided into six size groups and, when assembling the bogie, after measuring distance between friction strips at the top and completeness of overspring beam, having determined difference of said values, wedges of corresponding size group are chosen and installed to provide normalized position of wedges for friction set.
EFFECT: provision of normalized position of wedges of friction sets, putting out of car after repair in due time, prevention of failures in service.
3 tbl, 2 dwg
FIELD: filling of flying vehicle tanks with fuel.
SUBSTANCE: proposed refueling vehicle includes truck tractor 1 with semi-trailer-tank 2 and pneumatic system for control and monitoring and reception and transfer of fuel; control system includes filling valve and pressure relay mounted in bottom part of semi-trailer-tank; vent valve and upper level limiter are mounted in its upper part; provision is made for fuel supply and monitoring system with fuel supply valve and fuel pressure control system. Brake system of truck tractor 1 is connected with brake system of semi-trailer-tank system 2 for blocking motion of truck tractor. Fuel reception and monitoring system is provided with preliminary level limiter. Fuel supply and monitoring system is provided with control unit for emergency discontinuation of refueling.
EFFECT: avoidance of hydraulic shock in filling pipe line.
23 cl, 4 dwg
FIELD: mechanical engineering.
SUBSTANCE: invention can be used for repairing vehicles, namely, for reconditioning of rims and vehicle wheel disks by plastic deformation. Device for reconditioning wheels contains deforming member installed on support, cradle with rollers, at least two blocks and check member. Jack can be used as deforming member, and indicator installed in holder secured on post, or gauge can be used as check member.
EFFECT: facilitated make and application.
2 cl, 2 dwg
FIELD: modification and restoration of metal surfaces of friction units of machine elements whose operation requires high tribotecynical properties.
SUBSTANCE: proposed method consists in grinding crysotile-asbestos in vortex mill at delivery of air to its lower portion at pressure of 2-4 atm followed by continuous successive dividing of powder thus obtained into three fractions: 8-15 mcm, 5-10 mcm and 2-5 mcm. Fractions thus obtained are mixed with organic binder at ratio of 0.1-0.2 g of powder per 5 ml of binder. Mixture thus prepared is placed in between friction surfaces and surfaces of parts are saturated under standard operating conditions with one of mixtures thus obtained depending on clearance between parts.
EFFECT: enhanced economical efficiency; improved properties of friction unit surfaces due to absence of abrasive-like solid particles in modifying compound.
10 cl, 1 dwg
FIELD: machine engineering, possibly restoration of toothed parts.
SUBSTANCE: method comprises steps of removing worn teeth; making tooth blanks for further welding them with body of part; cutting out groove in part body; placing tooth blank in said groove; performing welding along lateral surfaces of groove; at side of effort applying to tooth, forming welded seam from groove base till mean zone of its height and at opposite side of groove forming welded seam from open edge of groove till mean zone of its height.
EFFECT: simplified process for restoring parts with teeth, increased useful life of restored parts.
1 dwg, 1 ex
FIELD: oil production, particularly to recover, repair and commissioning of oil-and-gas pipes, namely casing pipes, flow string and equipment in-situ or at repair station.
SUBSTANCE: method involves cleaning pipes connected with each other through couplings of contaminants; performing all undermentioned technological operations with the use of automatic control system used as expert and/or system control system, namely carrying out input line control, pipe and coupling body diagnostics and analyzing, input complex control, additional technological pipe and coupling marking and so on. Closed threaded coupling connection with pipe, outer and inner pipe and coupling cleaning, pipe body sweeping-up and multiparameter threaded pipe and coupling section control including that in closed pipe-coupling connection, diagnostics of pipe and coupling body sections located under previously closed threads and having wall thicknesses close to minimal ones are carried out before linear control. After that pipes are grouped into potentially repairable ones in accordance with pipe body and thread parameters to obtain predetermined pipe class. Then the pipes are distributed into several flows having individually preset treatment regimes and operation types for following pipe treatment and after that the pipes are subjected to ultrasound and mechanical treatment. As couplings leave technological coupling treatment line and after coupling and multiparameter pipe control termination couplings are screwed together. Then anti-scuffing coating is applied on thread and rust-preventing coating is applied on inner pipe surfaces. Pipes connected with couplings are subjected to hydraulic tests along with acoustic emission control and are dried. Output multiparameter pipe thread control is carried out to control complex characteristics of pipe thread, including threaded sections. Then pipes are automatically marked. Input and output multiparameter control is performed at ultrasonic threaded pipe section treatment stage with the use of ultrasound threaded working tool as measuring gage. Equipment system for said method realization is also disclosed.
EFFECT: increased quality and reliability of preliminary treaded pipe section control during ultrasonic treatment operation, increased productivity and efficiency of pipe preparation for operation, decreased costs and leakage through threaded connections of recovered pipe strings.
186 cl, 7 dwg
FIELD: restoration processes and equipment, namely restoration of heat pipes having flaws in the form of cracking for combustion chambers of gas turbine engines.
SUBSTANCE: method comprises steps of removing flaws in the form of cracking by mechanically removing of material with formation of groove subjected to further welding on; forming groove having width 1 - 3 mm, length exceeding by 2 - 3 mm length of cracking and depth consisting of 0.3 - 0.5 of thickness of cracked portion.
EFFECT: lowered labor consumption, improved operational reliability of restored heat pipe.
2 cl, 3 dwg, 1 ex
FIELD: machine engineering, namely processes for repairing turbocompressors, possibly in machine engineering and restoration engineering plants of agricultural-industrial complex.
SUBSTANCE: method comprises steps of electric spark application of coating onto worn surfaces of parts. In one variant of invention coating is applied onto shaft and onto stopper; in other variant - onto casing of shaft bearing assembly; in third variant coating is applied onto opening of body of mean bearing assembly. In different cases coating is applied in different modes.
EFFECT: possibility of increasing mean value of resource between restoring operations of turbocompressors.
6 cl, 1 tbl