CN111967104A

CN111967104A - Mining scraper conveyor sprocket parameterization modeling plug-in components based on UG secondary development

Info

Publication number: CN111967104A
Application number: CN202010833268.9A
Authority: CN
Inventors: 张晓兰; 薛守智; 韩琳; 刘天慧; 王汝元
Original assignee: Qingdao Oake Intelligent System Co ltd
Current assignee: Qingdao Oake Intelligent System Co ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2020-11-20

Abstract

The invention discloses a mining scraper conveyor chain wheel parameterization modeling plug-in based on UG secondary development, which adopts an interactive mode of an x-dll executable file to realize functions, plans and simplifies the chain wheel modeling steps according to the chain wheel structure analysis result, achieves the simplest modeling mode and the highest efficiency, considers the complexity of a built chain wheel model and the characteristics of later-stage convenience in parameter modification and chain wheel stretching, and adopts a sketch plane stretching method to build the model; the invention has the beneficial effects that: the operation process is simple, the UG software does not need to be mastered by an operator, and the sprocket model can be automatically generated by directly inputting corresponding dimension parameters in a plug-in interface; the number of self-defined parameters is provided to the maximum extent, and in the actual production, the self-defined modeling can be carried out on the chain wheel with the size of an individual part different from the national standard.

Description

Mining scraper conveyor sprocket parameterization modeling plug-in components based on UG secondary development

Technical Field

The invention belongs to the technical field of chain wheels of mining scraper conveyors, and particularly relates to a UG secondary development-based parameterized modeling plug-in for the chain wheels of the mining scraper conveyors.

Background

The mining scraper conveyor chain wheel used in the coal industry is different from a common chain wheel and comprises chain nests with the number four times that of teeth; the chain links are arranged in the chain nest during operation, the planes of two adjacent chain links are mutually vertical, the working mode ensures that the structure of the chain link is greatly different from that of a common chain wheel and is very easy to wear, and the cost is high due to the problems of materials and processes. Thus, replacing a completely new sprocket to maintain production is the primary means of addressing the wear of the pocket, and a scrapped sprocket is often only slightly worn at the edge of the pocket, the actual wear volume is not large, and thus replacing the entire sprocket would appear to be "wasteful". The eliminated chain wheel has to be re-melted and re-cast, thereby wasting great resource and time cost and even causing certain pollution to the environment; on the premise, the worn chain wheel is expected to be scanned, the model after scanning and optimizing processing is subjected to Boolean difference calculation with the standard part of the chain wheel of the model to obtain the shape and the size of a worn area, the worn area is repaired by combining a 3D printing mode, and then the worn area is subjected to secondary milling processing, so that the worn area is recycled, and the chain wheel model of the required model can be quickly obtained.

Although the model with the required model can be obtained through UG conventional commands, the complexity of the chain wheel structure makes the modeling difficult, the time consumption is long, the technical requirement on the technical level of drawing personnel is higher, and the bottleneck restricting the next step of work is formed, on the other hand, in the actual equipment production, the chain wheel models are numerous, and most of the used chain wheels are not designed and produced according to the size strictly provided by the national standard, so the modeling work is further difficult, at present, the existing chain wheel parameterized modeling plug-in only provides a fixed model of the national standard chain wheel, and the size of individual parts cannot be customized and planned, so the application value in the actual production is not large, through analyzing the design steps of the chain wheel, the modeling process of the chain wheel is basically consistent, and only the sizes of the individual parts are different, in order to facilitate production and improve production efficiency, parametric development is carried out on the modeling process of the mining scraper conveyor chain wheel, time cost is saved for follow-up work, and great convenience is provided for drawing personnel.

Disclosure of Invention

The invention aims to provide a parameterized modeling plug-in for a chain wheel of a mining scraper conveyor based on UG secondary development, which aims to solve the problems that although a model with a required model can be obtained through conventional commands of UG, the complexity of the structure of the chain wheel causes certain difficulty and long time consumption in modeling, and the requirement on the technical level of a drawing worker is higher, so that the bottleneck restricting the next step of work is formed.

In order to achieve the purpose, the invention provides the following technical scheme: the mining scraper conveyor chain wheel parameterization modeling plug-in based on UG secondary development adopts an interactive mode of a dll executable file to realize functions, plans and simplifies the chain wheel modeling steps according to the chain wheel structure analysis result to achieve the simplest modeling mode and the highest efficiency, considers the complexity of the established chain wheel model, the later convenience for parameter modification and the chain wheel stretching characteristics, and establishes the model by adopting a sketch plane stretching method, wherein the modeling steps are as follows:

the method comprises the following steps: carrying out sketch modeling on the central area of the chain wheel, wherein the central area of the chain wheel is a torus, the sketch is two concentric circles, and the diameter of an excircle is D_iInner circle diameter of D_h；

Step two: carrying out sketch modeling on the shape of the sprocket wheel tooth;

step three: according to the arc radius R of the vertical ring groove₄And the radius R of the arc of the root of the short tooth₅Carrying out corresponding rounding on the model;

step four: obtaining the chain wheel groove, firstly drawing an entity model of the cutter by adopting a Boolean difference solving mode, and then solving the difference of the cutter on the entity subjected to the previous Boolean summation to obtain the required model;

step five: drawing a second sketch required by the sweep;

step six: the boolean differencing tool is derived from two sweeps, the first with radius R₃The semicircle of (2) is a guide line, and the enclosed area enclosed by the straight line (2), the straight line (5), the line segment (6) and the arc (3) is a swept cross section to obtain a swept solid body (1); sweeping by taking the arc 2 as a sweeping guide line and a curved surface surrounded by a closed curve formed by the semi-arc and the line segment 7 as a sweeping section for the second time to obtain a swept entity 2, then performing Boolean summation on the two swept entities, and then performing mirror image solving on the tool after summation through a plane formed by the line segment 1 and a Z axis to obtain the tool required for solving the difference;

step seven: and performing Boolean difference calculation on the Boolean summed stretched entity by using the obtained cutter, so that chain socket grooves are cut on the sprocket teeth of the sprocket, and performing circular array on difference calculation characteristics to obtain a final sprocket model.

As a preferred technical solution of the present invention, in the fourth step, the entity obtained by the tool through two-stage sweep needs to establish two sketches, two guide lines and two section diagrams.

As a preferable technical solution of the present invention, in the sixth step, a single curve mode is adopted when the curve is selected.

In a preferred embodiment of the present invention, in the seventh step, the number is the number N of teeth, and the span is 360 °.

As a preferred technical solution of the present invention, the parameters to be determined are: sprocket tooth number N, chain nominal dimension d, pitch p.

As a preferred technical means of the present inventionThe parameters to be measured are: sprocket outside diameter D_eDiameter D of vertical groove of vertical ring of chain wheel_iWidth l of vertical groove of vertical ring of chain wheel and diameter D of central hole_hAxial thickness of short teeth of chain wheel

Axial thickness of short teeth of chain wheel

The short tooth thickness W.

Compared with the prior art, the invention has the beneficial effects that:

(1) the operation process is simple, the UG software does not need to be mastered by an operator, and the sprocket model can be automatically generated by directly inputting corresponding dimension parameters in a plug-in interface;

(2) the number of self-defined parameters is provided to the maximum extent, and in the actual production, the self-defined modeling can be carried out on the chain wheel with the size of an individual part different from the national standard.

Drawings

FIG. 1 is a schematic view of the interposer interface structure of the present invention;

FIG. 2 is a schematic view of the resulting sprocket effect structure of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 and fig. 2, the present invention provides a technical solution: the mining scraper conveyor chain wheel parameterization modeling plug-in based on UG secondary development adopts an interactive mode of a dll executable file to realize functions, plans and simplifies the chain wheel modeling steps according to the chain wheel structure analysis result to achieve the simplest modeling mode and the highest efficiency, considers the complexity of the established chain wheel model, the later convenience for parameter modification and the chain wheel stretching characteristics, and establishes the model by adopting a sketch plane stretching method, wherein the modeling steps are as follows:

The above procedure is D_iThe diameter is adopted, the orientation matrix is a matrix of the UG sketch, the circle center is (0, 0, 0), circular sketch modeling is carried out, then size constraint and marking are carried out on the circular sketch, an inner circle, namely the sketch of a center hole, can be added in the same step, and in order to ensure that zero parameters can be input, a condition statement is adopted to judge whether the building is carried out;

the above procedure is an operation for stretching the central region of the sprocket, T₁Is the axial thickness of the short teeth of the chain wheel is 1, T₂I.e. the vertical groove width L, T of the vertical ring of the chain wheel₃The axial thickness of the short teeth of the chain wheel is 2, and in order to keep the inner plane of the two teeth symmetrical to the XOY plane, the stretching method can facilitate subsequent operation, and the central torus modeling can be completed by stretching according to parameters input by a user in the Z direction;

line1＝workPart.Curves.CreateLine(startPoint1，endPoint1)：

line2＝workPart.Curves.CreateLine(startPoint2，endPoint2)：

geom1_1.Geometry＝line2：

geom2_1.Geometry＝line1：

sketchGeometricConstraint1＝theSession.ActiveSketch.CreateCoincidentConstraint(geoml_1，geom2_1)：

building two segments, and forming a spline curve by connection constraint;

the above procedure is to limit the angles of two connected line segments in the spline curve, and each model is 15 degrees;

geom2.Geometry＝line1：

sketchGeometricConstraint2＝theSession.ActiveSketch.CreateVerticalConstraint(geom2)：

carrying out vertical constraint on the line segment 1;

Curve[]curves2＝new Curve[1]：

curves2[0]＝line2：

Curve[]curves3＝new Curve[1]：

curves3[0]＝line1：

DatumAxis datumAxis1＝(DatumAxis)workPart.Datums.FindObject(”DATUM_CSYS(0)Y axis”)：

sketchMirrorPatternBuilderi.DirectionObject.Value＝datumAxis1：

nXObject2＝sketchMirrorPatternBuilder1.Commit()：

the operation is to make the two connecting line sections symmetrical about the Y axis to obtain the profiles of the two sides of the gear teeth;

arc2＝workPart.Curves.CreateArc(center，nxmatrix，30，(30*Math.PI/180.0)，(20*Math.PI/180.0))：

geom1_3.Geometry＝arc2：

geom2_3.Geometry＝line1：

sketchGeometricConstraint4＝theSession.ActiveSketch.CreateCoincidentConstraint(geom1_3，geom2_3)：

geom1_4.Geometry＝arc2：

geom2_4.Geometry＝(Line)objects1[1]：

sketchGeometricConstraint5＝theSession.ActiveSketch.CreateCoincidentConstraint(geom1_4，geom2_4)：

the program is characterized in that (0, 0, 0) is used as a circle center, an orientation matrix is a matrix of a UG sketch per se to create an upper gear tooth arc, and two end points of the UG sketch are constrained with upper end points of an upper line segment and a mirror image of the upper line segment through connection constraint;

arc3＝workPart.Curves.CreateArc(center，nxmatrix，180，(40*Math.PI/180.0)，(45*Math.PI/180.0))：

geom1_6.Geometry＝arc3：

geom2_6.Geometry＝line2：

sketchGeometricConstraint7＝theSession.ActiveSketch.CreateCoincidentConstraint(geom1_6，geom2_6)：

geom1_7.Geometry＝arc3：

geom2_7.Geometry＝(Line)objects1[0]：

sketchGeometricConstraint8＝theSession.ActiveSketch.CreateCoincidentConstraint(geom1_7，geom2_7)：

the program is characterized in that (0, 0, 0) is taken as the center of a circle, an orientation matrix is a matrix of a UG sketch per se to create a gear tooth lower arc, and two end points of the gear tooth lower arc and lower end points of a lower line segment and a mirror image of the lower line segment are constrained together through connection constraint;

the above procedures carry out D on the circular arc on the gear tooth_iA size constraint of/2;

the above procedures carry out D on the lower arc of the gear tooth_eA/2 dimensional constraint, up to which the tooth sketch forms a closed curve;

according to the constraint, the line segment 1 and the mirror image thereof are in parallel relation, the distance between the two parallel line segments is subjected to size constraint with the parameter of the thickness W of the short teeth, at the moment, the sketch still needs the last constraint to be completely constrained, and according to the conventional method, the last constraint needs to newly establish two line segments, so that five constraints are added, not only is certain difficulty brought to drawing of the sketch realized, but also the later modeling is very unfavorable;

according to the conventional method, line1, line2 and line3 are indispensable, the sketch can be completely constrained only by the geometrical relations of line1, line2 and line3, but the analysis can show that, because of the definite geometrical relations, the length of line3 can be obtained by the geometrical relations in the program and the sketch can be completely constrained, two line segments can be established less, the steps can be reduced, the operation efficiency and the reliability can be improved, and the analysis is as follows:

knowing that < a > is equal to < b, we need to find the value of h finally, and the value is:

h＝h₃-h₁-h₂

h₃＝H/cos∠a

h₁＝(W×tan∠b)/2

and then carrying out size constraint with the value h on the line3 so as to completely constrain the gear tooth profile sketch, wherein the codes are as follows:

then, taking the origin as the center, and carrying out circular array on the constrained gear tooth closed contour line on an XOY plane, wherein the number is the number of gear teeth N, and the span is 360 degrees;

the program sets the relation between the profiles of the gear to be stretched in advance according to three parameters input by a user, the program automatically stretches twice to obtain the approximate shape of the gear teeth of the chain wheel, two groups of gear teeth which are not necessarily symmetrical to an XOY plane are obtained as a result, and then Boolean summation operation is carried out on the centers of the chain wheel and the gear teeth obtained by the previous three times of stretching, so that subsequent modeling is facilitated;

step four: obtaining the chain wheel groove, firstly drawing an entity model of the cutter by adopting a Boolean difference solving mode, and then solving the difference of the cutter on the entity subjected to the previous Boolean summation to obtain the required model; the cutter is an entity obtained by two-section sweeping, so two sketches need to be established, two guide lines and two section graphs are needed;

the above procedure is based on two points on the newly created blank sketch:

(0.0，0.0，0.0)

(H×sin(π/N)，H×cos(π/N)，0.0)

newly building a line segment 1 (an included angle of 360 degrees (2 XN) between the chain pocket center and the Y axis and a distance H between the chain pocket center and a chain pocket bottom plane, which are determined according to the tooth numbers of chain wheels of different models), and then obtaining a new starting point (the end point of the straight line 1) and an end point according to the chain pocket center distance and the end point position of the line 1;

(H×sin(π/N)-(A/2)×cos(π/N)，H×cos(π/N)+(A/2)×sin(π/N)，0.0)

establishing a straight line 2;

the end point of the line segment 1 and the start point of the line segment 2 are constrained together, and R is biased outwards along the end point direction of the line segment 1 for the line segment 2₂The starting point and the end point of the distance-obtaining straight line3 are respectively

((R₂+H)×sin(π/N)，(R₂+H)×cos(π/N)，0.0)

((R₂+H)×sin(π/N)-(A/2)×cos(π/N)，(R₂+H)×cos(π/N)+(A/2)×sin(π/N)，0.0)

And parallel to line segment 2 and according to R₂For distance parameter constraint size, carrying out size constraint with parameters of H and angle constraint of 360 degrees/2 multiplied by N on the line segment 1, fixing a starting point at a coordinate origin, carrying out size constraint with parameters of A/2 on the line segment 2, constraining the line segment 1 to be vertical to the line segment 2, and operating the line segment 3 by taking a Y axis as a mirror image line to obtain a line segment 4;

the above procedure takes the left end point of the straight line3 as the center of the circle and takes R as the center₁+R₂Making an arc 1 with a radius;

intersection line 4 and point 1;

then using point 1 as the center of circle and R as the center of circle₁Making an arc 2 with a radius;

using the left vertex of the straight line3 as the center of a circle and R₂Drawing an arc 3 for the radius, constraining the arc 1 and the arc 2 to be circumscribed to a point 2 through geometric constraint, trimming the part of the arc 2 below the point 2 and the part of the arc 3 above the point 2, and constraining the arc by respective arc parameters;

taking the point 2 as an end point to make a line segment 6 parallel to the straight line2, and taking the middle point of the straight line2

((startPoint2.X+endPoint2.X)/2，(startPoint2.Y+endPoint2.Y)/2，0.0)

And the middle point of the straight line3

((startPoint3.X+endPoint3.X)/2，(startPoint3.Y+endPoint3.Y)/2，0.0)

Making a line segment 5 perpendicular to the straight line2, cutting the upper half part of the straight line by taking the line segment 6 as a boundary, and cutting the right side of the straight line2 to ensure that the length of the line segment 6 is slightly less than R₃So as to avoid errors in subsequent operations, completely constraining the sketch object by using the data used for drawing the sketch, and finally converting the line segment 1, the line segment 3, the line segment 4 and the circular arc 1 into references to finish drawing the sketch;

step five: drawing a second sketch required by the sweep;

a sketch is newly created by taking a plane passing through the point 2 and perpendicular to the line segment 1, and taking the end point of the line6 as the center of a circle, R₃Creating a new semicircle with a radius of (line6.EndPoint. X, line6.EndPoint. Y, -R₃) Starting point, (line6.EndPoint. X, line6.EndPoint. Y, R₃) Connecting two semicircular end points by a newly-built line segment 7 for the end point (at the moment, automatic judgment constraint needs to be created), wherein the length of the constraint line segment 7 is two times R₃And the Y axis vertical to the sketch is constrained by geometric constraint, and the distance from the end point of the semicircular arc to the center of the sketch is R₃Then using the parameter R₃The size restricts the semi-circle radius and restricts the semi-circle arc to make the semi-circle arc pass through the point 2, so that the sketch can be completely restricted, and the sketch exits;

step six: the boolean difference tool is composed ofTwo sweeps, the first with radius R₃The semicircle of (2) is a guide line, and a closed area enclosed by the straight line (5), the line segment (6) and the arc (3) is a swept section (a single curve mode is adopted when a curve is selected), so that a swept entity (1) is obtained; sweeping by taking the arc 2 as a sweeping guide line and a curved surface surrounded by a closed curve formed by the semi-arc and the line segment 7 as a sweeping section for the second time to obtain a swept entity 2, then performing Boolean summation on the two swept entities, and then performing mirror image solving on the tool after summation through a plane formed by the line segment 1 and a Z axis to obtain the tool required for solving the difference;

step seven: performing Boolean difference calculation on the Boolean summed stretched entity by using the obtained cutter to cut chain socket grooves on the teeth of the sprocket, and performing circular array (the number is N, and the span is 360 degrees) on difference calculation characteristics to obtain a final sprocket model; in order to facilitate subsequent processing, the model is moved to enable the working coordinate system and the reference coordinate system to coincide and enable the Z-axis direction to be the direction of the line segment 1 of the model, and the X-axis is located in the XOY plane of the model

Vector3d xDirection1＝new Vector3d(1，-Math.Tan(Math.PI/N)，-0.0)：

Vector3d yDirection1＝new Vector3d(0.0，0.0，-1.0)：

Finally, the program compiled by the above operations can be stored as a CANSHUHUA.cs file and compiled into a CANSHUA.d 11 executable file through Visual Studio, and the executable file can be used for subsequent operations.

The parameters to be determined are listed below

The dimensions to be measured are shown below

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The mining scraper conveyor chain wheel parametric modeling plug-in based on UG secondary development is characterized in that functions can be realized in an interactive mode of an all-dll executable file, the chain wheel modeling steps are planned and simplified according to the analysis result of the chain wheel structure, the simplest modeling mode and the highest efficiency are achieved, the complexity of a built chain wheel model and the characteristics of later-stage convenience in parameter modification and chain wheel stretching are considered, the model is built by a sketch plane stretching method, and the modeling steps are as follows:

step five: drawing a second sketch required by the sweep;

2. The UG quadratic development-based mining scraper conveyor sprocket parametric modeling plug-in of claim 1, characterized in that: in the fourth step, the entity obtained by the tool through two-stage sweep needs to establish two sketches, two guide lines and two section graphs.

3. The UG quadratic development-based mining scraper conveyor sprocket parametric modeling plug-in of claim 1, characterized in that: in the sixth step, a single curve mode is adopted when the curve is selected.

4. The UG quadratic development-based mining scraper conveyor sprocket parametric modeling plug-in of claim 1, characterized in that: in the seventh step, the number is the number of teeth N, and the span is 360 °.

5. The UG quadratic development-based mining scraper conveyor sprocket parametric modeling plug-in of claim 1, characterized in that: the parameters to be determined are: sprocket tooth number N, chain nominal dimension d, pitch p.

6. The UG quadratic development-based mining scraper conveyor sprocket parametric modeling plug-in of claim 1, characterized in that: parameters to be measured: sprocket outside diameter D_eDiameter D of vertical groove of vertical ring of chain wheel_iWidth l of vertical groove of vertical ring of chain wheel and diameter D of central hole_hAxial thickness of short teeth of chain wheel 1T₁Axial thickness of short teeth of chain wheel 2T₃The short tooth thickness W.