CN106843158B - CAM system of stamping frame connecting plate equipment and processing method - Google Patents
CAM system of stamping frame connecting plate equipment and processing method Download PDFInfo
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- CN106843158B CN106843158B CN201710283148.4A CN201710283148A CN106843158B CN 106843158 B CN106843158 B CN 106843158B CN 201710283148 A CN201710283148 A CN 201710283148A CN 106843158 B CN106843158 B CN 106843158B
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- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/4097—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by using design data to control NC machines, e.g. CAD/CAM
Abstract
A CAM system of a stamping frame connecting plate device and a processing method are characterized by comprising the following modules: the system comprises a pretreatment and die library management module, an automatic adaptation die module, an optimization module, an automatic edge searching module, an NC program creating module and an analog simulation module; the pretreatment and die library management module respectively puts the connecting plate data and the die library data into corresponding arrays; the automatic adaptation mould module automatically adapts moulds for all effective data in the array according to a traditional adaptation mould method or a long circular hole adaptation mould method, and writes the effective data back to a connecting plate graphic library; the optimization module reads data of the automatic adaptive die to process the die adaptive to the traditional adaptive die or the long round hole adaptive die respectively, the automatic edge searching module processes the special-shaped plate, then steps such as NC program creation, simulation and the like are carried out, a punching program suitable for punching connecting plate equipment is formed, and the punching program is transmitted to connecting plate numerical control punching equipment to be produced and processed.
Description
Technical Field
The invention relates to the technical field of mechanical design, control systems and computer-aided manufacturing of numerical control punching equipment, in particular to a CAM (computer-aided manufacturing) system of punching equipment for automobile frame connecting plates.
Background
The frame is an installation foundation of each part on the automobile, generally consists of a longitudinal beam and a cross beam, is connected with each part of the automobile and bears various loads from the inside and the outside of the automobile; the connecting plate (i.e. the beam) is an important component of the frame, and the connecting plate is characterized in that the hole positions are more than ten to dozens of different holes, and the novel connecting plate is provided with one or more long round holes which are usually arranged in the horizontal or vertical direction; secondly, a plurality of connecting plates are special-shaped parts, the processing of the parts of the connecting plates usually adopts manual punching by a punch press or drilling by an electric drill, the precision is poor, the efficiency is low, the punching of the connecting plates is processed by numerical control hydraulic plate punching equipment along with the requirements of the quality and the safety of the automobile, because the numerical control hydraulic plate punching equipment is designed aiming at standard plates, special-shaped plates are difficult to automatically position and are usually positioned manually, so that the speed efficiency of the connecting plate numerical control punching equipment is influenced. The invention takes the numerical control punching equipment for the connecting plate as a research target, and the punching mode of the numerical control punching equipment for the automobile connecting plate at present has the following defects: 1. the irregular plates (special-shaped parts) are difficult to position; 2. the long round hole can not be automatically matched with a cutter; 3. the die is easy to break due to unbalance loading, and the service life is influenced.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the CAM system of the equipment for stamping the frame connecting plate, the technical innovation is carried out on the defects that the traditional connecting plate equipment cannot process special-shaped plates, the automatic positioning is realized by automatically finding edges, and a novel automatic tool matching solution is provided for long round holes, so that the aims of adapting to the characteristics of high speed, high performance and high efficiency of connecting plate stamping, improving the punching speed and precision and prolonging the service life of a die are fulfilled.
The scheme is realized by the following technical measures: a CAM system of punching press frame tie plate equipment, characterized by that it includes: pretreatment and die library management module: the pretreatment and die library management module defines common variables, a punching array D, an optimization array D and a die library array M, CAM layer; establishing connection with a CAD system; reading data of an external mold library file, establishing a mold block graph for each mold in a block form, and putting the data of each mold into a mold library array M; reading the graph of the CAD connecting plate graph library, obtaining the layer, color, line shape, plate shape and graph data of the CAD graph, and if the graph is not a long round hole, not processing the graph at this step; if the long circular hole pattern is the CAD pattern, forming a surface area for the long circular pattern formed by two arcs of the long circular hole and two straight lines in the CAD pattern, wherein the layer of the surface area is the same layer as the arcs, the color is the same as the color of the arcs, and the shape of the surface area is written back to a CAD part connecting plate pattern library; reading all pixels of a CAD part connecting plate graphic library after the oblong holes are processed, screening out pixel data needed by adapting a mold and automatically searching edges, and converting the pixel data into a punching array D; outputting the data of the stamping array D to an automatic adaptive die module and an automatic edge searching module;
the automatic edge searching module receives the shape of the plate transmitted by the pretreatment and die library management module, and processes the plate according to the traditional plate if the plate is in a standard rectangle shape; if the plate is irregular (special-shaped plate), automatic edge searching is adopted, and a processing result is output to an NC program creating module;
automatically adapting the die module: the automatic adaptive mold module comprises a traditional adaptive mold module and a long circular hole adaptive mold module, adapts the mold according to a traditional adaptive mold method or a long circular hole adaptive mold method for all graphic data, and writes the mold graphic after the mold adaptation back into a CAD part connecting plate graphic library; the automatic adaptation mould module obtains punching press array D from the preprocessing and mould library management module: the long round hole adaptation mould module obtains long round hole data from the front processing and mould library management module, and the adaptation mould is correspondingly adapted with the horizontally placed long round mould or the vertically placed long round mould due to the fact that the long round hole of the connecting plate has the horizontally placed or vertically placed characteristic; the traditional adaptive die module acquires data from a stamping array D output by the front processing and die library management module; firstly, taking data of a group of circles, and judging whether the diameter of the circle in the stamping array D is equal to the diameter of the die (No. 1-9) in the die array: if so, writing back the die graph of the die number to a CAM layer in a graph database, and continuously taking the next group of data in the punching array D; if not, taking down one die and judging; if all the molds can not be matched with the circle, outputting that the circle has no proper mold and displaying the coordinate value and the diameter of the circle center; then, the next circle in the punching array D is taken to carry out the operations until the data in the punching array D are all adapted; and outputting the result of the automatic adaptation mould to an optimization module;
an optimization module: the optimization module reads all the die graphs output to the CAM layer of the connecting board graph library by the automatic adaptive die module, and puts the die information, the coordinate values of the die graphs, the die adaptation types and other parameters into an optimization array D defined by the pretreatment and die library management module for optimization sequencing; outputting the sorting result to an NC program creating module;
an NC program creating module: and the NC program creating module converts the data of the array into an output statement format in sequence according to the sorting result output by the optimizing module, displays the output statement format in an output window, writes the output statement format into an NC program file, and outputs the NC program to a numerical control system of the frame connecting plate equipment for punching.
The invention is characterized in that the automatic edge searching processing means that the automatic edge searching module obtains all vertical lines (90-degree or 270-degree lines) of x =0 from the CAD connecting plate graphic library from the front processing and die library management module, if a plurality of vertical lines of x =0 exist, the line with the maximum Y value is taken as the left line of the part, and the length of the line is taken;
if the length of the left sideline is equal to the plate width, treating according to the traditional plate;
if the length of the left sideline is less than 100, the plate moves downwards by 15 mm;
if the length of the left edge > =100 and is less than the sheet width, the sheet moves to the middle of the left edge.
The automatic edge searching for the special-shaped plate is realized by moving the left side line of the special-shaped plate up and down to contact with the positioning pin, so that the Y axis of the workpiece is determined, the edge clamped by the clamp is the X axis, and the coordinate system of the workpiece is determined.
The algorithm of the long circular hole fitting die method is as follows:
setting the total length of the long round hole as L80And an angle A, horizontally placing and taking the X direction, and vertically placing and taking the Y direction; length of the long round die is L30(X direction is horizontally placed and Y direction is vertically placed) to obtain the difference L of two lengths67=L80-L30Length L of straight line part of die17Calculating L67Is divided by L17DS (i.e., the number of stamping times of the die);
if the angle A of the long round hole is horizontally placed and horizontally placed long round mould adaptation
If DS =1, performing single punching in the middle of the long round hole
If DS =2, the first knife X1= at the center point X-L of the oblong hole80Half of the length of/2 + knife
Y1= at the centre point Y of the oblong hole
Second knife X2= at the center point X + L of the oblong hole80Half of the/2-blade length
Y2= at the centre point Y of the oblong hole
If DS =3, the first knife X1= in lengthCenter point X-L of circular hole80Half of the length of/2 + knife
Y1= at the centre point Y of the oblong hole
Second knife X2= at the center point X + L of the oblong hole80Half of the/2-blade length
Y2= at the centre point Y of the oblong hole
Punching at the center of the long round hole by a third cutter
If DS>3 the first knife X1= at the center point X-L of the oblong hole80Half of the length of/2 + knife
Y1= at the centre point Y of the oblong hole
Last knife Xmax= at the center point X + L of the oblong hole80Half of the/2-blade length
Ymax= at the centre point Y of the oblong hole
The middle knives are circularly realized by the number of the rest knives = DS-2 and the rest length = L80-2xL30
Step length = remaining length/number of knives remaining
When the number of remaining knives > =1
X of impact pointi= X of first tool impact point1+ step size
Yi= at the centre point Y of the oblong hole
Punching point adaptive cutter
Number of remaining knives = number of remaining knives-1
Unconditionally transferring to the above cycle judgment until the number of the remaining knives is less than 1;
if the angle A of the oblong hole is vertically arranged, the oblong hole is matched with the vertically arranged oblong die
If DS =1, performing single punching in the middle of the long round hole
If DS =2, the first knife Y1= at the centre point Y-L of the oblong hole80Half of the length of/2 + knife
X1= at the centre point X of the oblong hole
Second knife Y2= at the centre point Y + L of the oblong hole80Half of the/2-blade length
X2= at the centre point X of the oblong hole
If DS =3, the first knife Y1= at the centre point Y-L of the oblong hole80Half of the length of/2 + knife
X1= at the centre point X of the oblong hole
Second knife Y2= at the centre point Y + L of the oblong hole80Half of the/2-blade length
X2= at the centre point X of the oblong hole
Punching at the center of the long round hole by a third cutter
If DS>3 the first knife Y1= at the centre point Y-L of the oblong hole80Half of the length of/2 + knife
X1= at the centre point X of the oblong hole
Last knife Ymax= at the centre point Y + L of the oblong hole80Half of the/2-blade length
Xmax= at the centre point X of the oblong hole
The middle knives are circularly realized by the number of the rest knives = DS-2 and the rest length = L80-2×L30
Step length = remaining length/number of knives remaining
When the number of remaining knives > =1
Y of impact pointi= Y + step length of first tool punching point
Xi= at the centre point X of the oblong hole
Punching point adaptive cutter
Number of remaining knives = number of remaining knives-1
Unconditionally shifting to the above loop judgment until the number of the remaining knives is less than 1
Finally, the matched die graph is written back to the CAD part connecting plate graph library.
The invention also provides a CAM processing method of the stamping frame connecting plate equipment, which is characterized by comprising the following steps:
pretreatment and die library management steps: defining public variables, a punching array D, an optimizing array D and a die library array M, CAM layer in the pretreatment and die library management steps; establishing connection with a CAD system; reading data of an external mold library file, establishing a mold block graph for each mold in a block form, and putting the data of each mold into a mold library array M; reading the graph of the CAD connecting plate graph library, obtaining the layer, color, line shape, plate shape and graph data of the CAD graph, and if the graph is not a long round hole, not processing the graph at this step; if the long circular hole pattern is the CAD pattern, forming a surface area for the long circular pattern formed by two arcs of the long circular hole and two straight lines in the CAD pattern, wherein the layer of the surface area is the same layer as the arcs, the color is the same as the color of the arcs, and the shape of the surface area is written back to a CAD part connecting plate pattern library; reading all pixels of a CAD part connecting plate graphic library after the oblong holes are processed, screening out pixel data needed by adapting a mold and automatically searching edges, and converting the pixel data into a punching array D; outputting the data of the stamping array D to an automatic adaptation mould step and an automatic edge searching step;
the automatic edge searching step receives the plate shape transmitted by the pretreatment and die library management steps, and if the plate shape is a standard rectangle, the plate is processed according to the traditional plate; if the plate is irregular, namely, a special-shaped plate, automatic edge searching is adopted, and a processing result is output to the NC program creating step;
and (3) automatically adapting the die: the step of automatically adapting the die comprises the steps of traditionally adapting the die and the step of adapting the long round hole die, adapting the die for all graphic data according to a traditional adaptation die method or a long round hole adaptation die method, and writing the die graphics after the die is adapted back to a CAD part connecting plate graphic library; the automatic adaptation mould step obtains punching press array D from the preprocessing and mould storehouse management step: the long round hole adaptation mould step obtains the long round hole data from the previous processing and mould library management step, and the adaptation mould is correspondingly adapted with the horizontally placed long round mould or the vertically placed long round mould due to the fact that the long round hole of the connecting plate has the characteristic of being horizontally placed or vertically placed; the traditional step of adapting the die acquires data from a stamping array D output from the steps of preprocessing and die library management; firstly, taking data of a group of circles, and judging whether the diameter of the circle in the stamping array D is equal to the diameter of the die in the die array: if so, writing the die graph of the die number back to a CAM layer in a graph database and continuously taking the next group of data in the punching array D; if not, taking down one die and judging; if all the molds can not be matched with the circle, outputting that the circle has no proper mold and displaying the coordinate value and the diameter of the circle center; then, the next circle in the punching array D is taken to carry out the operations until the data in the punching array D are all adapted; outputting the result of automatically adapting the mould to the optimization step;
and (3) optimizing: the optimization step reads all the die graphs output to the CAM layer of the connecting plate graph library in the automatic die adapting step, and puts the parameters such as die information, coordinate values of the die graphs, die adapting types and the like into an optimization array D defined by the pretreatment and die library management steps for optimization sequencing; outputting the sorting result to an NC program creating step;
an NC program creating step: and the NC program creating step converts the data of the array into an output statement format in sequence according to the sorting result output by the optimizing step, displays the output statement format in an output window, writes the output statement format into an NC program file, and outputs the NC program to a numerical control system of the frame connecting plate equipment for punching.
The automatic edge searching processing means that all vertical lines of x =0, namely 90-degree or 270-degree lines, are selected from a CAD connecting plate graphic library obtained in the front processing and die library management steps in the automatic edge searching step, if a plurality of vertical lines of x =0 exist, the line with the maximum Y value is taken as the left line of the part, and the length of the line is taken;
if the length of the left sideline is equal to the plate width, treating according to the traditional plate;
if the length of the left sideline is less than 100, the plate moves downwards by 15 mm;
if the length of the left edge > =100 and is less than the sheet width, the sheet moves to the middle of the left edge.
The algorithm of the long circular hole fitting die method is as follows:
setting the total length of the long round hole as L80And an angle A, horizontally placing and taking the X direction, and vertically placing and taking the Y direction; length of the long round die is L30Horizontally placing the glass tube in the X direction, vertically placing the glass tube in the Y direction, and calculating the difference L between the two lengths67=L80-L30Length L of straight line part of die17Calculating L67Is divided by L17DS (i.e., the number of stamping times of the die);
if the angle A of the long round hole is horizontally placed and horizontally placed long round mould adaptation
If DS =1, performing single punching in the middle of the long round hole
If DS =2, the first knife X1= at the center point X-L of the oblong hole80Half of the length of/2 + knife
Y1= at the centre point Y of the oblong hole
Second knife X2= at the center point X + L of the oblong hole80Half of the/2-blade length
Y2= at the centre point Y of the oblong hole
If DS =3, the first knife X1= at the center point X-L of the oblong hole80Half of the length of/2 + knife
Y1= at the centre point Y of the oblong hole
Second knife X2= at the center point X + L of the oblong hole80Half of the/2-blade length
Y2= at the centre point Y of the oblong hole
Punching at the center of the long round hole by a third cutter
If DS>3 the first knife X1= at the center point X-L of the oblong hole80Half of the length of/2 + knife
Y1= at the centre point Y of the oblong hole
Last knife Xmax= at the center point X + L of the oblong hole80Half of the/2-blade length
Ymax= at the centre point Y of the oblong hole
The rest cutters are circularly usedResidual length of = DS-2 = L80-2xL30
Step length = remaining length/number of knives remaining
When the number of remaining knives > =1
X of impact pointi= X of first tool impact point1+ step size
Yi= at the centre point Y of the oblong hole
Punching point adaptive cutter
Number of remaining knives = number of remaining knives-1
Unconditionally transferring to the above cycle judgment until the number of the remaining knives is less than 1;
if the angle A of the oblong hole is vertically arranged, the oblong hole is matched with the vertically arranged oblong die
If DS =1, performing single punching in the middle of the long round hole
If DS =2, the first knife Y1= at the centre point Y-L of the oblong hole80Half of the length of/2 + knife
X1= at the centre point X of the oblong hole
Second knife Y2= at the centre point Y + L of the oblong hole80Half of the/2-blade length
X2= at the centre point X of the oblong hole
If DS =3, the first knife Y1= at the centre point Y-L of the oblong hole80Half of the length of/2 + knife
X1= at the centre point X of the oblong hole
Second knife Y2= at the centre point Y + L of the oblong hole80Half of the/2-blade length
X2= at the centre point X of the oblong hole
Punching at the center of the long round hole by a third cutter
If DS>3 the first knife Y1= at the centre point Y-L of the oblong hole80Half of the length of/2 + knife
X1= at the centre point X of the oblong hole
Last knife Ymax= at the centre point Y + L of the oblong hole80Half of the/2-blade length
Xmax= at the centre point X of the oblong hole
The middle knives are circularly realized by the number of the rest knives = DS-2 and the rest length = L80-2*L30
Step length = remaining length/number of knives remaining
When the number of remaining knives > =1
Y of impact pointi= Y + step length of first tool punching point
Xi= at the centre point X of the oblong hole
Punching point adaptive cutter
Number of remaining knives = number of remaining knives-1
Unconditionally shifting to the above loop judgment until the number of the remaining knives is less than 1
Finally, the matched die graph is written back to the CAD part connecting plate graph library.
Compared with the prior art, the invention has the beneficial effects that:
(1) the CAM system of the equipment for stamping the frame connecting plates, disclosed by the invention, is used for inventing a special-shaped part processing method, namely automatic edge finding, aiming at the defects existing in the traditional equipment, realizing automatic positioning, improving the processing speed of the equipment (each connecting plate is shortened by 1 minute), and improving the efficiency by 20%.
(2) According to the CAM system of the equipment for stamping the vehicle frame connecting plate, the traditional long round hole adaptive die is used for stamping by selecting the die with the area approximate to the same area according to the radius, the length and the width of the long round hole, the long round hole is usually very long in a connecting plate graph, the equipment is generally stamped by the long round die for multiple times due to the fact that the number of die stations is small and the tonnage is limited, and a novel automatic tool matching method is adopted for the long round hole with the special length, so that the punching speed is improved, the eccentric load of the die is overcome, the service life of the die is prolonged, and the cost is saved.
Drawings
The invention is further illustrated with reference to the figures and examples.
FIG. 1 is a system block diagram of a CAM system of a stamping frame web apparatus.
Fig. 2 is a layout view of a die magazine of the apparatus for punching a vehicle frame connecting plate.
Fig. 3 is a data flow diagram of a CAM system of a stamping frame web apparatus.
Fig. 4 is a process flow diagram of a slotted hole fitting die.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and examples.
FIG. 1 is a system diagram of a CAM system of a stamping frame connection plate device, which comprises three major parts, wherein a CAD part is a graph for drawing a connection plate; the CAM part is the core content and has the functions of reading a connecting plate drawing of a connecting plate graphic library, automatically adapting a mold, optimizing and creating an NC program; the third part program execution object is the stamping connecting plate numerical control punching equipment.
A CAM system for a stamped vehicle frame web apparatus, comprising:
pretreatment and die library management module: defining a die library array M, a stamping array D, an optimized array D, CAM layer, a simulation layer and a public variable; reading parameters of a setting window, storing the parameters in a common variable defined by a data definition module, wherein the parameters comprise a program number, a connecting plate length, a connecting plate width, a thickness, an X stroke, a Y stroke and the like; establishing connection between a CAD (computer aided design) and a CAM (computer aided manufacturing), reading all pixels of a connecting plate graphic library, screening out entities with pixel names equal to a circle, a straight line with x =0 and a long circular hole, and acquiring attribute values of the entities, wherein the attributes of the circle comprise a circle center and a straight line, the attributes of the straight line comprise a start point coordinate, an end point coordinate, a line angle and a line length, the attributes of the long circular hole comprise a circular arc radius, a total length, a center point coordinate, an angle and a straight line part length, and the attributes are converted into each column of a punching array D; reading data of an external mold library and putting the data into the mold library data; and the array and the public variable are transmitted to each functional module such as an automatic adaptive mould module, an optimization module, an automatic edge searching module, an analog simulation module, an NC program creating module and the like.
Data structures for punching array D and optimizing array D, Public D (3000, 7) As STRING
D (i,0) is a pixel type (circle, straight line and oblong hole), D (i,1) is an X coordinate value or a starting point X value of the straight line or a central coordinate X D (i,2) of the oblong hole, a Y coordinate value or a starting point Y value of the straight line or a central coordinate Y D (i,3) of the oblong hole, a diameter of the circle, an arc diameter of the oblong hole or an end point X value D (i,4) of the straight line stored in a punching array D, and an end point Y value D (i,5) of the straight line stored in a straight line length or an oblong hole length D (i,6) stored in a straight line or an oblong hole angle; storing the mold number D (i,4) in the optimized array D, wherein x + x is deviated from D (i,5) and y + y is deviated from D (i, 4); the automatic edge searching module is used for a functional module such as an automatic adaptation mould module, an optimization module, an automatic edge searching module, an analog simulation module, an NC program creating module and the like.
The mold library array M is a two-dimensional array, Public M (9, 8) As Variant' stores the mold library: the tool position number (mold number), type, dimension X, dimension Y, dimension R, diameter, angle, X-direction offset and Y-direction offset are used for automatically adapting to functional modules such as a mold module, an optimization module, an analog simulation module and an NC program creation module.
Public variable Public PROGNUM As String' program number
Public BANLENTH As String' sheet length
Width of Public BANWIDTH As String' plate
Thickness of Public HOUDU As String
Public CLQD As Double' Material Strength
More than 100 Public PNum As Integer' effective hole counts are used for each functional module.
Automatically adapting the die module: respectively adapting the dies for the data in the stamping array D output by the preprocessing and die library management module according to the traditional die adapting method and the long round hole die adapting method, and writing die patterns into a pattern library; including conventional adapter die modules and slotted hole adapter die modules.
(1) And the traditional adaptive die module is used for respectively adapting the die to the round hole and the long round hole punched at one time according to the type of the die library and the pixel type in the punching array D.
Attribute values of the round holes and the long round holes and mould data are provided by a stamping array D and a mould array output by the pretreatment and mould library management module, and mould graphs are written into a graph library after the moulds are adapted; for reading by the optimization module.
(2) The long round hole is matched with the mould module: for the long round hole which can not be punched at one time, the figure is adapted to the mould according to a calculation method of two, three and multiple times of punching, the attribute value of the long round hole and the mould data are provided by a punching array D and a mould array which are output by a pretreatment and mould library management module, and the mould figure is written into a figure library after the mould is adapted; for the optimization module to read; the following is a model of a main calculation method for a large slotted hole horizontally placed and requiring more than 3 cutters to be matched with a slotted hole mold:
L80= total length of long round hole on graph
L30Length of long round mould
L67= L80 - L30' Difference of two lengths
L17= length of straight part of die
DS=int(L67/ L17+ 0.99)' to obtain L67Is divided by L17DS (i.e., the number of stamping times of the die);
if DS>3 the first knife X1= at the center point X-L of the oblong hole80Half of the length of/2 + knife
Y1= at the centre point Y of the oblong hole
Punching point adaptive cutter
Last knife Xmax= at the center point X + L of the oblong hole80Half of the/2-blade length
Ymax= at the centre point Y of the oblong hole
Punching point adaptive cutter
The middle knives are circularly realized by the number of the rest knives = DS-2 and the rest length = L80 -2* L30
Step length = remaining length/number of knives remaining
Do While remaining number of knives > =1
X of impact pointi= X + step length of first tool punching point
Yi= at the centre point Y of the oblong hole
Punching point adaptive cutter
Number of remaining knives = number of remaining knives-1
Loop
Unconditionally shifts to the above loop judgment until the number of remaining knives is less than 1. A Do while.
The traditional optimization module: the optimization module reads the coordinate values and the die numbers of all block insertion points of the CAM layer of the graphic library written back by the automatic adaptive die module to be placed in an optimization array D, the coordinate values and the die numbers are sorted from small to large according to X + die offset, and if the X + offset is the same, Y is arranged according to the nearest distance; and outputting the sorted optimized array D data to an NC program creating module and an analog simulation module.
An automatic edge searching module: the automatic edge searching module judges whether the workpiece is a special-shaped plate according to parameters set by the plate in the pretreatment and die library management module and data of a straight line with the pixel type of X =0 in the punching array D, the special-shaped plate contacts a left side line of a special-shaped piece with a positioning pin by moving up and down so as to determine a Y axis of the workpiece, and the edge clamped by a clamp is an X axis so as to determine a coordinate system of the workpiece; and outputting the workpiece movement data to the NC program creation module.
An NC program creating module: and the NC program creating module converts the data of the array into an output statement format in sequence according to the sorting result output by the optimizing module, displays the output statement format in an output window, writes the output statement format into an NC program file, and transmits the output statement format to a program execution object for processing and running or performs analog simulation in a visual window.
An analog simulation module: and reading data of the NC program, sequentially carrying out visual simulation display in a connecting plate graphic library, exiting the die and entering normal display.
Fig. 2 is a layout diagram of a mold warehouse, wherein the mold structure is a layout structure of two rows, the back row is used for placing large molds and only 4 molds, the front row is used for placing small molds and 5 molds, and the total number of the molds is 9.
Offset placement angle in X direction of size of station number die type die
1 circular knife 900
2 circular knife 1550.50
3 circular knife 171010
4 circular knife 13151.50
5 circular knife 112020
6 circular knife 3560
7 round knife 40660
8 round knife 501310
9 long circular knife 40X 301960 or 90
As shown in fig. 3, the CAM system of the punching frame connection board device mainly has two data streams, the first data stream is written back to the CAD part connection board pattern library from the CAD pattern through the automatic adapting die module, so as to realize the functions of the preprocessing and die library management module and the automatic adapting die module. A graph of a connecting plate is read into a pixel set (comprising a circle, a line, a dimension mark, a polygon, a rectangle, an arc, an ellipse and the like) by a preprocessing and die library management module, the pixel set is filtered into a set of three pixels by a screening circle, a line and a long round hole, the set of the three pixels obtains attribute values, the attribute of the circle has a circle center and a straight line, the attribute of the straight line has a start point coordinate, an end point coordinate, a line angle and a line length, the attribute of the long round hole has an arc radius, a total length, a center point coordinate, an angle and a straight line part length to form an attribute set, the attribute set is given to a punching array D by numerical value conversion, plate data is also put into the punching array D, the punching array D is sorted into an ordered self-defined array according to pixel type items, all pixels of the ordered self-defined array transmit data according to three data flow directions, one, the pixels corresponding to the traditional adaptive die module are circles and long round holes punched at one time, and after comparison and judgment, a die block is formed and written into a CAD part connecting plate graphic library;
the long round holes taken out of the punching array D (namely the long round holes punched for more than two times need to be processed) are matched with the die modules through the long round holes, the long round hole matching die modules need to read in data of a die library, the long round holes of the array are defined in order, dies with the same diameter are matched, and all matched dies form die blocks and are written into a CAD part connecting plate pattern library; for the optimization module to read;
the automatic edge searching module needs to read in plate information, namely, a straight line with X =0 is searched for judging the special-shaped plate, special-shaped plate processing (automatic edge searching) is carried out, and a processing result (workpiece moving data) is written into an NC program;
the second data flow is to realize a traditional optimization module, an NC program creating module and an analog simulation module, the coordinate values and the mold numbers of all block insertion points of the connecting board graphic library are written back to the creating NC program from the first data flow, the traditional optimization module becomes a mold set by reading the mold blocks of the connecting board graphic library, the mold set obtains the coordinates of the insertion points and the mold numbers of the mold blocks, then the X coordinate passing through the insertion points is assigned to the 1 st item of the optimization array D, the Y coordinate of the insertion points is assigned to the 2 nd item of the optimization array D, the mold numbers are assigned to the 3 rd item of the optimization array D, the X coordinate of the insertion points and the mold offsets are assigned to the 4 th item of the optimization array D, the record numbers are assigned to the 0 th item of the optimization array D, the number of the molds with the same size is assigned to the 6 th item of the optimization array D to form the optimization array D, the optimization array D is sorted according to the size of the mold numbers, and forming an ordered optimization array D, and if the ordered optimization array D is a die matched by partitions, directly sending the ordered optimization array D to an ordered queue and then to simulation demonstration or NC program output.
FIG. 4 is a flowchart of the process for oblong hole fitting the mold; the function of realizing the long round hole adaptive mold module comprises the following steps:
the 401 oblong holes are matched with the die modules to achieve the purpose of taking the sizes of the data dies from the die warehouse and putting the sizes of the data dies into the die warehouse array M.
402 realize the data corresponding to each bit of the die library array M: m (i,0) is a station number; m (i,1) the type of mold; m (i,2) is the length in the X direction; m (i,3) the width in the Y direction; m (i,4) the radius of the arc; m (i,5) circle diameter; m (i,6) is the placing angle.
403 implement the join graph library, screen the punched pixels and put into the 1, 2 bits of the punched array D.
404 implement the 3-6 bits of the punching array D for the pixel screening related data.
405 to 427 realize the circle finding and the long circular hole matching mould, and the circle finding and the long circular hole matching are realized by circulation; the detailed steps are as follows: 405 implements j with an initial value of 1. 406, the J-row data of the stamped array D and the optimized array D are taken, namely D (J,0), D (J,1), D (J,2), D (J,3), D (J,4), D (J,5) and D (J, 6). 407, judging whether the hole is a long round hole or not, and if so, judging the stamping times; if not, judging whether the circle is formed, and fitting the mold in the center of the circle. 408, judging whether the long round hole can be punched at one time, if the long round hole can be matched with a die in the center of the long round hole, and if the long round hole cannot be punched, calculating the punching times. 409 to 410 realizes one-time punching treatment of the oblong holes. 411, to determine the long circle angle. 412 to 417 realize a horizontally placed oblong hole treatment. 418 to 423 enable a vertically placed oblong hole treatment. 424, determine if it is a circle, if 425, implement fitting the mold in the center of the circle, if not directly read the next line of data without processing (straight line). 426 implements data line plus 1. 427 implementing a cyclic incremental transfer; all round and oblong holes are fitted to the die and are finished 428.
Claims (4)
1. A CAM system of punching press frame tie plate equipment, characterized by that it includes:
pretreatment and die library management module: the pretreatment and die library management module defines common variables, a punching array D, an optimization array D and a die library array M, CAM layer; establishing connection with a CAD system; reading data of an external mold library file, establishing a mold block graph for each mold in a block form, and putting the data of each mold into a mold library array M; reading the graph of the CAD connecting plate graph library, obtaining the layer, color, line shape, plate shape and graph data of the CAD graph, and if the graph is not a long round hole, not processing the graph at this step; if the long circular hole pattern is the CAD pattern, forming a surface area for the long circular pattern formed by two arcs of the long circular hole and two straight lines in the CAD pattern, wherein the layer of the surface area is the same layer as the arcs, the color is the same as the color of the arcs, and the shape of the surface area is written back to a CAD part connecting plate pattern library; reading all pixels of a CAD part connecting plate graphic library after the oblong holes are processed, screening out pixel data needed by adapting a mold and automatically searching edges, and converting the pixel data into a punching array D; outputting the data of the stamping array D to an automatic adaptive die module and an automatic edge searching module;
the automatic edge searching module receives the shape of the plate transmitted by the pretreatment and die library management module, and processes the plate according to the traditional plate if the plate is in a standard rectangle shape; if the plate is irregular, namely, a special-shaped plate, automatic edge searching is adopted, and a processing result is output to an NC program creating module;
automatically adapting the die module: the automatic adaptive mold module comprises a traditional adaptive mold module and a long circular hole adaptive mold module, adapts the mold according to a traditional adaptive mold method or a long circular hole adaptive mold method for all graphic data, and writes the mold graphic after the mold adaptation back into a CAD part connecting plate graphic library; the automatic adaptation mould module obtains punching press array D from the preprocessing and mould library management module: the long round hole adaptation mould module obtains long round hole data from the front processing and mould library management module, and the adaptation mould is correspondingly adapted with the horizontally placed long round mould or the vertically placed long round mould due to the fact that the long round hole of the connecting plate has the horizontally placed or vertically placed characteristic; the traditional adaptive die module acquires data from a stamping array D output by the front processing and die library management module; firstly, taking data of a group of circles, and judging whether the diameter of the circle in the stamping array D is equal to the diameter of the die in the die array: if so, writing the die graph of the die number back to a CAM layer in a graph database and continuously taking the next group of data in the punching array D; if not, taking down one die and judging; if all the molds can not be matched with the circle, outputting that the circle has no proper mold and displaying the coordinate value and the diameter of the circle center; then, the next circle in the punching array D is taken to carry out the operations until the data in the punching array D are all adapted; and outputting the result of the automatic adaptation mould to an optimization module;
an optimization module: the optimization module reads all the die graphs output to the CAM layer of the connecting board graph library by the automatic adaptive die module, and puts the die information, the coordinate values of the die graphs, the die adaptation types and other parameters into an optimization array D defined by the pretreatment and die library management module for optimization sequencing; outputting the sorting result to an NC program creating module;
an NC program creating module: the NC program creating module converts the data of the arrays into output statement formats in sequence according to the sorting result output by the optimizing module, displays the output statement formats in an output window, writes the output statement formats into an NC program file, and outputs the NC program to a numerical control system of the frame connecting plate equipment for punching;
the automatic edge searching processing means that the automatic edge searching module obtains all vertical lines of x =0, namely 90-degree or 270-degree lines, from a CAD connecting plate graphic library from the front processing and mold library management module, and if a plurality of vertical lines of x =0 exist, the line with the maximum Y value is taken as the left line of the part, and the length of the line is taken;
if the length of the left sideline is equal to the plate width, treating according to the traditional plate;
if the length of the left sideline is less than 100, the plate moves downwards by 15 mm;
if the length of the left edge > =100 and is less than the sheet width, the sheet moves to the middle of the left edge.
2. The CAM system of claim 1, wherein the slotted hole fit die method is as follows:
setting the total length of the long round hole as L80And an angle A, horizontally placing and taking the X direction, and vertically placing and taking the Y direction; length of the long round die is L30Horizontally placing the glass tube in the X direction, vertically placing the glass tube in the Y direction, and calculating the difference L between the two lengths67=L80-L30Length L of straight line part of die17Calculating L67Is divided by L17The number of ends DS, i.e. the number of stamping times of the die;
if the angle A of the long round hole is horizontally placed and horizontally placed long round mould adaptation
If DS =1, performing single punching in the middle of the long round hole
If DS =2, the first knife X1= at the center point X-L of the oblong hole80Half of the length of/2 + knife
Y1= at the centre point Y of the oblong hole
Second knife X2= at the center point X + L of the oblong hole80Half of the/2-blade length
Y2= at the centre point Y of the oblong hole
If DS =3, the first knife X1= at the center point X-L of the oblong hole80Half of the length of/2 + knife
Y1= at the centre point Y of the oblong hole
Second knife X2= at the center point X + L of the oblong hole80Half of the/2-blade length
Y2= at the centre point Y of the oblong hole
Punching at the center of the long round hole by a third cutter
If DS>3 the first knife X1= at the center point X-L of the oblong hole80Half of the length of/2 + knife
Y1= at the centre point Y of the oblong hole
Last knife Xmax= at the center point X + L of the oblong hole80Half of the/2-blade length
Ymax= at the centre point Y of the oblong hole
The middle knives are circularly realized by the number of the rest knives = DS-2 and the rest length = L80-2xL30
Step length = remaining length/number of knives remaining
When the number of remaining knives > =1
X of impact pointi= X of first tool impact point1+ step size
Yi= at the centre point Y of the oblong hole
Punching point adaptive cutter
Number of remaining knives = number of remaining knives-1
Unconditionally transferring to the above cycle judgment until the number of the remaining knives is less than 1;
if the angle A of the oblong hole is vertically arranged, the oblong hole is matched with the vertically arranged oblong die
If DS =1, performing single punching in the middle of the long round hole
If DS =2, the first knife Y1= at the centre point Y-L of the oblong hole80Half of the length of/2 + knife
X1= at the centre point X of the oblong hole
Second knife Y2= at the centre point Y + L of the oblong hole80Half of the/2-blade length
X2= at the centre point X of the oblong hole
If DS =3, the first knife Y1= at the centre point Y-L of the oblong hole80Half of the length of/2 + knife
X1= at the centre point X of the oblong hole
Second knife Y2= at the centre point Y + L of the oblong hole80Half of the/2-blade length
X2= at the centre point X of the oblong hole
Punching at the center of the long round hole by a third cutter
If DS>3 the first knife Y1= at the centre point Y-L of the oblong hole80Half of the length of/2 + knife
X1= at the centre point X of the oblong hole
Last knife Ymax= at the centre point Y + L of the oblong hole80Half of the/2-blade length
Xmax= at the centre point X of the oblong hole
The middle knives are circularly realized by the number of the rest knives = DS-2 and the rest length = L80-2*L30
Step length = remaining length/number of knives remaining
When the number of remaining knives > =1
Y of impact pointi= Y + step length of first tool punching point
Xi= at the centre point X of the oblong hole
Punching point adaptive cutter
Number of remaining knives = number of remaining knives-1
Unconditionally shifting to the above loop judgment until the number of the remaining knives is less than 1
Finally, the matched die graph is written back to the CAD part connecting plate graph library.
3. A CAM processing method of a stamping frame connecting plate device is characterized by comprising the following steps:
pretreatment and die library management steps: defining public variables, a punching array D, an optimizing array D and a die library array M, CAM layer in the pretreatment and die library management steps; establishing connection with a CAD system; reading data of an external mold library file, establishing a mold block graph for each mold in a block form, and putting the data of each mold into a mold library array M; reading the graph of the CAD connecting plate graph library, obtaining the layer, color, line shape, plate shape and graph data of the CAD graph, and if the graph is not a long round hole, not processing the graph at this step; if the long circular hole pattern is the CAD pattern, forming a surface area for the long circular pattern formed by two arcs of the long circular hole and two straight lines in the CAD pattern, wherein the layer of the surface area is the same layer as the arcs, the color is the same as the color of the arcs, and the shape of the surface area is written back to a CAD part connecting plate pattern library; reading all pixels of a CAD part connecting plate graphic library after the oblong holes are processed, screening out pixel data needed by adapting a mold and automatically searching edges, and converting the pixel data into a punching array D; outputting the data of the stamping array D to an automatic adaptation mould step and an automatic edge searching step;
the automatic edge searching step receives the plate shape transmitted by the pretreatment and die library management steps, and if the plate shape is a standard rectangle, the plate is processed according to the traditional plate; if the plate is irregular, namely, a special-shaped plate, automatic edge searching is adopted, and a processing result is output to the NC program creating step;
and (3) automatically adapting the die: the step of automatically adapting the die comprises the steps of traditionally adapting the die and the step of adapting the long round hole die, adapting the die for all graphic data according to a traditional adaptation die method or a long round hole adaptation die method, and writing the die graphics after the die is adapted back to a CAD part connecting plate graphic library; the automatic adaptation mould step obtains punching press array D from the preprocessing and mould storehouse management step: the long round hole adaptation mould step obtains the long round hole data from the previous processing and mould library management step, and the adaptation mould is correspondingly adapted with the horizontally placed long round mould or the vertically placed long round mould due to the fact that the long round hole of the connecting plate has the characteristic of being horizontally placed or vertically placed; the traditional step of adapting the die acquires data from a stamping array D output from the steps of preprocessing and die library management; firstly, taking data of a group of circles, and judging whether the diameter of the circle in the stamping array D is equal to the diameter of the die in the die array: if so, writing the die graph of the die number back to a CAM layer in a graph database and continuously taking the next group of data in the punching array D; if not, taking down one die and judging; if all the molds can not be matched with the circle, outputting that the circle has no proper mold and displaying the coordinate value and the diameter of the circle center; then, the next circle in the punching array D is taken to carry out the operations until the data in the punching array D are all adapted; outputting the result of automatically adapting the mould to the optimization step;
and (3) optimizing: the optimization step reads all the die graphs output to the CAM layer of the connecting plate graph library in the automatic die adapting step, and puts the parameters such as die information, coordinate values of the die graphs, die adapting types and the like into an optimization array D defined by the pretreatment and die library management steps for optimization sequencing; outputting the sorting result to an NC program creating step;
an NC program creating step: the NC program creating step converts the data of the array into an output statement format in sequence according to the sorting result output by the optimizing step, displays the output statement format in an output window, writes the output statement format into an NC program file, and outputs the NC program to a numerical control system of the frame connecting plate equipment for punching;
the automatic edge searching processing means that all vertical lines of x =0, namely 90-degree or 270-degree lines, are selected from a CAD connecting plate graphic library obtained in the front processing and die library management steps in the automatic edge searching step, if a plurality of vertical lines of x =0 exist, the line with the maximum Y value is taken as the left line of the part, and the length of the line is taken;
if the length of the left sideline is equal to the plate width, treating according to the traditional plate;
if the length of the left sideline is less than 100, the plate moves downwards by 15 mm;
if the length of the left edge > =100 and is less than the sheet width, the sheet moves to the middle of the left edge.
4. The CAM processing method of a stamping frame connection plate device as claimed in claim 3, wherein an algorithm of the slotted hole fitting die method is as follows:
setting the total length of the long round hole as L80And an angle A, horizontally placing and taking the X direction, and vertically placing and taking the Y direction; length of the long round die is L30Horizontally placing the glass tube in the X direction, vertically placing the glass tube in the Y direction, and calculating the difference L between the two lengths67=L80-L30Length L of straight line part of die17Calculating L67Is divided by L17The number of ends DS, i.e. the number of stamping times of the die;
if the angle A of the long round hole is horizontally placed and horizontally placed long round mould adaptation
If DS =1, performing single punching in the middle of the long round hole
If DS =2, the first knife X1= at the center point X-L of the oblong hole80Half of the length of/2 + knife
Y1= at the centre point Y of the oblong hole
Second knife X2= at the center point X + L of the oblong hole80Half of the/2-blade length
Y2= at the centre point Y of the oblong hole
If DS =3, the first knife X1= at the center point X-L of the oblong hole80Half of the length of/2 + knife
Y1= at the centre point Y of the oblong hole
Second knife X2= at the center point X + L of the oblong hole80Half of the/2-blade length
Y2= at the centre point Y of the oblong hole
Punching at the center of the long round hole by a third cutter
If DS>3 the first knife X1= at the center point X-L of the oblong hole80Half of the length of/2 + knife
Y1= at the centre point Y of the oblong hole
Last knife Xmax= at the center point X + L of the oblong hole80Half of the/2-blade length
Ymax= at the centre point Y of the oblong hole
The middle knives are circularly realized by the number of the rest knives = DS-2 and the rest length = L80-2xL30
Step length = remaining length/number of knives remaining
When the number of remaining knives > =1
X of impact pointi= X of first tool impact point1+ step size
Yi= at the centre point Y of the oblong hole
Punching point adaptive cutter
Number of remaining knives = number of remaining knives-1
Unconditionally transferring to the above cycle judgment until the number of the remaining knives is less than 1;
if the angle A of the oblong hole is vertically arranged, the oblong hole is matched with the vertically arranged oblong die
If DS =1, performing single punching in the middle of the long round hole
If DS =2, the first knife Y1= at the centre point Y-L of the oblong hole80Half of the length of/2 + knife
X1= at the centre point X of the oblong hole
Second knife Y2= at the centre point Y + L of the oblong hole80Half of the/2-blade length
X2= at the centre point X of the oblong hole
If DS =3, the first knife Y1= at the centre of the oblong holePoint Y-L80Half of the length of/2 + knife
X1= at the centre point X of the oblong hole
Second knife Y2= at the centre point Y + L of the oblong hole80Half of the/2-blade length
X2= at the centre point X of the oblong hole
Punching at the center of the long round hole by a third cutter
If DS>3 the first knife Y1= at the centre point Y-L of the oblong hole80Half of the length of/2 + knife
X1= at the centre point X of the oblong hole
Last knife Ymax= at the centre point Y + L of the oblong hole80Half of the/2-blade length
Xmax= at the centre point X of the oblong hole
The middle knives are circularly realized by the number of the rest knives = DS-2 and the rest length = L80-2*L30
Step length = remaining length/number of knives remaining
When the number of remaining knives > =1
Y of impact pointi= Y + step length of first tool punching point
Xi= at the centre point X of the oblong hole
Punching point adaptive cutter
Number of remaining knives = number of remaining knives-1
Unconditionally shifting to the above loop judgment until the number of the remaining knives is less than 1
Finally, the matched die graph is written back to the CAD part connecting plate graph library.
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| CN101211174A (en) * | 2006-12-26 | 2008-07-02 | 天津昊拓汽车装备技术有限公司 | Method for processing normal direction hole using three axis numerically controlled machine |
| CN102707669A (en) * | 2009-11-27 | 2012-10-03 | 济南铸造锻压机械研究所有限公司 | Method for constructing CAM (computer-aided manufacturing) system for punching for automobile girders |
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| CN101211174A (en) * | 2006-12-26 | 2008-07-02 | 天津昊拓汽车装备技术有限公司 | Method for processing normal direction hole using three axis numerically controlled machine |
| CN102707669A (en) * | 2009-11-27 | 2012-10-03 | 济南铸造锻压机械研究所有限公司 | Method for constructing CAM (computer-aided manufacturing) system for punching for automobile girders |
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