CN107052548A - The control method of supervisor's hole cutting process plasma cutting gun height of welding groove - Google Patents
The control method of supervisor's hole cutting process plasma cutting gun height of welding groove Download PDFInfo
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- CN107052548A CN107052548A CN201710308127.3A CN201710308127A CN107052548A CN 107052548 A CN107052548 A CN 107052548A CN 201710308127 A CN201710308127 A CN 201710308127A CN 107052548 A CN107052548 A CN 107052548A
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- 238000005520 cutting process Methods 0.000 title claims abstract description 105
- 238000003466 welding Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000010354 integration Effects 0.000 claims abstract description 4
- 230000010152 pollination Effects 0.000 claims abstract description 4
- 238000010586 diagram Methods 0.000 claims description 7
- 238000004364 calculation method Methods 0.000 claims description 3
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- 241000208340 Araliaceae Species 0.000 description 2
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K10/00—Welding or cutting by means of a plasma
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F30/00—Computer-aided design [CAD]
- G06F30/10—Geometric CAD
- G06F30/17—Mechanical parametric or variational design
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Abstract
The invention discloses a kind of control method of supervisor's hole cutting process plasma cutting gun height of welding groove, according to the cutting parameter of input, automatically calculate burning torch height of the plasma cutting gun on cutting track, and then calculate the track of burning torch end, cutting process is generated by digital control system, finally cut according to the cutting process of generation, improve the precision stability of cutting, rate of effectively reducing the number of rejects and seconds.Its step of is：Article on plasma burning torch carries out mathematical modeling that is abstract and setting up burning torch and workpiece, it is determined that related input parameter；Set up the mathematical modeling of welding groove；During beveling and cutting, the control method of plasma cutting gun height；By the plasma cutting gun high integration after planning into trajectory planning, and then generate cut-sytle pollination program.
Description
Technical field
The present invention relates to the control method of plasma cutting gun height in a kind of supervisor's hole cutting process of welding groove.
Background technology
In the pipeline engineering such as oil, chemical industry, water conservancy, fire-fighting application, cutting that Guan Guanxiang is passed through and welding be one very
Important task, in some commercial Applications, often pipeline can be stored with liquid or gaseous material, and these materials are to pipeline
Air-tightness and barotolerance require very high, and some materials even have corrosivity, therefore, in these occasions, tubing connection
Welding quality be an important investigation target.As the preliminary preparation of continuous line welding, mutually pass through two-tube cutting with
Post-processing technique can directly influence clamping error and the quality of welding.In order to ensure the air-tightness of tubing connection and resistance to
It is voltage resistance, the connected mode of interpolation type is used between pipeline, which is to the precision of cutting and the treatment technology requirement of tangent plane
It is higher, typically can be in supervisor or branch pipe bevel, if branch pipe takes interpolation type to connect in order to improve the quality of continuous line welding
Connect, then need the bevel on supervisor.
Rapid development is obtained since plasma cutting technique self-application, by cutting speed is fast, workpiece deformation is small etc.
Advantage, disclosure satisfy that high-quality split requirement.But at the same time, plasma cut is different from common cutter and cut, wait from
Certain gap must be kept to ensure the stabilization of arc voltage between sub- burning torch and workpiece, when burning torch is highly bigger than normal, workpiece compared with
Thick position, which occurs, cuts impermeable phenomenon；When burning torch is highly less than normal, it is easy to collided at a certain position of workpiece,
Damage the precision that burning torch even cuts equipment influence cutting.
Therefore, need the height of article on plasma burning torch to be controlled in cutting process, especially beveling and cutting when burning torch
The planning of height, the invention discloses a kind of controlling party of plasma cutting gun height in supervisor's hole cutting process with root face groove
Method.
The content of the invention
The purpose of the present invention is exactly to solve the above problems, the supervisor hole cutting process for providing a kind of welding groove is medium
The control method of ion burning torch height, we define burning torch end (including protective cover) and the vertical range of workpiece surface is defined as
Burning torch height (such as Fig. 2), because during beveling and cutting, theoretical plasma cutting gun track is that complicated intersection is (main
The space curve that inside pipe wall and the intersection of branch pipe outer wall formation are constituted), by carrying out homogeneous transformation and right to intersection track
Burning torch highly carries out planning control, has obtained the final position of burning torch and posture, and it is according to the desired height value of user and phase
The cutting parameter of pass, automatically calculates the burning torch height value of each position on cutting track, can effectively ensure plasma arc voltage
Stabilization and avoid the collision between workpiece, improve cutting precision, reduce workpiece percent defective.
To achieve the above object, the present invention is adopted the following technical scheme that：
A kind of welding groove supervisor hole cutting process in plasma cutting gun height control method, it the step of be：
The first step：Article on plasma burning torch carries out geometrical model that is abstract and setting up burning torch and workpiece, it is determined that related input
Parameter, including the radius of plasma cutting gun, the upper bottom radius of burning torch nozzle and round platform cone angle, the radius of beam-plasma；
Second step：The geometrical model of welding groove is set up, the parameter and cutting parameter of welding groove is determined；
3rd step：It is determined that the plasma cutting gun height after planning；
4th step：By the plasma cutting gun high integration after planning into trajectory planning, and then generate cut-sytle pollination journey
Sequence；Control system is cut according to the cutting process to supervisor hole.
In the first step, desired burning torch height d is given0(assuming that suitable), in order to prevent collision, burning torch is with supervisor's
Minimum spacing g0(g0＜ d0), the exterior radius of supervisor is Ro, inwall radius is Ri, the height of root face is h, by plasma cutting gun etc.
Imitate as cylinder, radius is Rg, the nozzle of burning torch end is equivalent to round platform, and bottom radius surface is identical with the radius of cylinder, on
Bottom surface radius is rg, round platform cone angle is Ψ, and the radius of beam-plasma is m；
In the second step, set up the geometrical model of welding groove, as shown in figure 1, model parameter include groove angle γ and
Tube wall gap b, and the cutting parameter of correlation is determined, it is included in intersection cutting process the dihedral angle w of any on intersection.
In 3rd step, in beveling and cutting, the burning torch after planning is highly：
Wherein σ=arcsin (sin (φ-γ))；
φ is that the section of any is with supervisor in the dihedral angle in the section of the point on intersection for branch pipe, and γ is cutting ginseng
Groove angle in number.
Specific analysis method is as follows：
In the case of beveling and cutting, the burning torch after note planning is highly D, the actual spacing between plasma cutting gun and supervisor
For g, the angle between the center line and workpiece tangent plane of burning torch be defined as burning torch angle σ (definition from straight line and plane included angle,All the time set up), the calculation formula at burning torch angle is：σ=arcsin (sin (φ-γ)), wherein, φ is that branch pipe exists
The section of any is with supervisor in the dihedral angle in the section of the point, and γ is the groove angle in cutting parameter, both at known
Parameter.
Below, situation discussion is divided：When burning torch angle than it is larger when, i.e. d0Sin σ ＞ g0Set up, now, the burning torch after planning is high
Degree D is highly identical with desired burning torch, and actual spacing g is more than burning torch and the minimum spacing of supervisor, will not collide；Work as burning torch
When angle is gradually reduced in cutting process, a critical point σ can be reached0, now, D=d0, g=g0Establishment, i.e. burning torch and workpiece
Distance is just equal to minimum spacing g0, will not collide, by the method shown in schematic diagram, can calculate critical just
Point：
Reduce with the continuation at burning torch angle, in order that the distance of burning torch and workpiece keeps minimum spacing constant, can only increase
Actual burning torch height D, by the method shown in schematic diagram, the actual height that can calculate burning torch isTo sum up
Described, in beveling and cutting, the burning torch after planning is highly：
Its general principles are：According to the cutting parameter of input, plasma cutting gun is automatically calculated in cutting rail
Burning torch height on mark, and then the track of burning torch end is calculated, cutting process is generated by digital control system, finally according to generation
Cutting process is cut.
The beneficial effects of the invention are as follows：Before generation procedure, pass through the supervisor hole cutting process of welding groove
The control method of middle plasma cutting gun height automatically calculates burning torch height of the plasma cutting gun on cutting track, and by counting
Control system generate procedure, can (1) certain gap is kept between plasma cutting gun and workpiece to ensure the stabilization of arc voltage；
(2) avoid a certain position with workpiece in cutting process from colliding, damage the essence that burning torch even cuts equipment influence cutting
Degree；(3) precision of cutting is ensure that, the welding quality in later stage can be effectively improved.
Brief description of the drawings
Fig. 1 is the geometrical model of welding groove；
Fig. 2 is plasma cutting gun model and incision principle schematic diagram；
Fig. 3, Fig. 4 are that plasma cutting gun highly plans schematic diagram.
Embodiment
The present invention will be further described with embodiment below in conjunction with the accompanying drawings.
In Fig. 1,2,3, planing method of the invention is：
The first step：Article on plasma burning torch carries out geometrical model that is abstract and setting up burning torch and workpiece, it is determined that related input
Parameter, including the ginseng such as the radius of plasma cutting gun, the upper bottom radius of burning torch nozzle and round platform cone angle, the radius of beam-plasma
Number；
Second step：The geometrical model of welding groove is set up, the parameter of welding groove, i.e. groove angle and tube wall gap is determined；
3rd step：During beveling and cutting, the control method of plasma cutting gun height；
4th step：By the plasma cutting gun high integration after planning into trajectory planning, and then generate cut-sytle pollination journey
Sequence；Control system is cut according to the cutting process to supervisor hole.
In the first step, desired burning torch height d is given0(assuming that suitable), in order to prevent collision, burning torch and the minimum of supervisor
Spacing g0(g0＜ d0), the exterior radius of supervisor is Ro, inwall radius is Ri, the height of root face is h, and plasma cutting gun is equivalent to
Cylinder, radius is Rg, the nozzle of burning torch end is equivalent to round platform, and bottom radius surface is identical with the radius of cylinder, upper bottom surface
Radius is rg, round platform cone angle is Ψ, and the radius of beam-plasma is m；
In second step, the geometrical model of welding groove is set up, as shown in figure 1, model parameter includes groove angle γ and tube wall
Gap b, and the cutting parameter of correlation is determined, it is included in intersection cutting process the dihedral angle of any on intersection.
In 3rd step, in the case of beveling and cutting, the burning torch after note planning is highly D, plasma cutting gun and supervisor
Between actual spacing be g, the angle between the center line and workpiece tangent plane of burning torch is defined as burning torch angle σ (by straight line and plane
Knowable to the definition of angle,All the time set up), the calculation formula at burning torch angle is：σ=arcsin (sin (φ-γ)),
Wherein, φ is that the section of branch pipe on one point is the groove in cutting parameter with being responsible for the dihedral angle in the section of the point, γ
Angle, both at known parameters.
Below, situation discussion is divided：When burning torch angle than it is larger when, i.e. d0Sin σ ＞ g0Set up, now, the burning torch after planning is high
Degree D is highly identical with desired burning torch, and actual spacing g is more than burning torch and the minimum spacing of supervisor, will not collide；Work as burning torch
When angle is gradually reduced in cutting process, a critical point σ can be reached0, now, D=d0, g=g0Establishment, i.e. burning torch and workpiece
Distance is just equal to minimum spacing g0, will not collide, by the method shown in schematic diagram, can calculate critical just
Point：
Reduce with the continuation at burning torch angle, in order that the distance of burning torch and workpiece keeps minimum spacing constant, can only increase
Actual burning torch height D, by the method shown in schematic diagram, the actual height that can calculate burning torch isTo sum up
Described, in beveling and cutting, the burning torch after planning is highly：
Claims (5)
1. the control method of plasma cutting gun height in a kind of supervisor's hole cutting process of welding groove, it is characterized in that, it
Step is：
The first step：Article on plasma burning torch carries out geometrical model that is abstract and setting up burning torch and workpiece, it is determined that related input parameter,
The upper bottom radius and round platform cone angle, the radius of beam-plasma of radius including plasma cutting gun, burning torch nozzle；
Second step：The geometrical model of welding groove is set up, the parameter and cutting parameter of welding groove is determined；
3rd step：It is determined that the plasma cutting gun height after planning；
3rd step：It is determined that the plasma cutting gun height after planning；
4th step：By the plasma cutting gun high integration after planning into trajectory planning, and then generate cut-sytle pollination program；Control
System processed is cut according to the cutting process to supervisor hole.
2. the control method of plasma cutting gun height in supervisor's hole cutting process of welding groove as claimed in claim 1,
It is characterized in that, in the first step, give desired burning torch height d0, set burning torch and the minimum spacing g of supervisor0(g0＜ d0),
The exterior radius of supervisor is Ro, inwall radius is Ri, the height of root face is h, plasma cutting gun is equivalent into cylinder, radius is
Rg, the nozzle of burning torch end is equivalent to round platform, and bottom radius surface is identical with the radius of cylinder, and upper bottom surface radius is rg, round platform cone
Angle is Ψ, and the radius of beam-plasma is m.
3. the control method of plasma cutting gun height in supervisor's hole cutting process of welding groove as claimed in claim 1,
It is characterized in that, described welding groove parameter includes groove angle and tube wall gap；Described cutting parameter is included in intersection and cut
The dihedral angle of any on intersection during cutting.
4. the control method of plasma cutting gun height in supervisor's hole cutting process of welding groove as claimed in claim 2,
It is characterized in that, in the 3rd step, in beveling and cutting, the burning torch after planning is highly：
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Wherein σ=arcsin (sin (φ-γ))；
φ is that the section of branch pipe on one point is the groove in cutting parameter with being responsible for the dihedral angle in the section of the point, γ
Angle.
5. the control method of plasma cutting gun height in supervisor's hole cutting process of welding groove as claimed in claim 4,
It is characterized in that, in beveling and cutting, the specific determination method of burning torch height after planning is as follows：
In the case of beveling and cutting, the burning torch after note planning is highly D, and the actual spacing between plasma cutting gun and supervisor is g,
Angle between the center line and workpiece tangent plane of burning torch is defined as burning torch angle σThe calculation formula at burning torch angle is：
σ=arcsin (sin (φ-γ)), wherein, φ is the section of branch pipe on one point with being responsible in two faces in the section of the point
Angle, γ is the groove angle in cutting parameter, both at known parameters；
When burning torch angle σ than it is larger when, i.e. d0Sin σ ＞ g0Set up, the burning torch height D after planning is highly identical with desired burning torch,
Actual spacing g is more than burning torch and the minimum spacing of supervisor, will not collide；
When burning torch angle is gradually reduced in cutting process, a critical point σ can be reached0, now, D=d0, g=g0Set up, that is, cut
The distance of rifle and workpiece is just equal to minimum spacing g0, will not collide, by the method shown in schematic diagram, can calculate just
Draw critical point：
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Reduce with the continuation at burning torch angle, in order that the distance of burning torch and workpiece keeps minimum spacing constant, reality can only be increased
Burning torch height D, the actual height that can calculate burning torch is
In summary, in beveling and cutting, the burning torch after planning is highly：
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2
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115922040A (en) * | 2022-12-12 | 2023-04-07 | 山东大学 | Self-adaptive compensation method and system for Y-shaped groove of intersecting branch pipe for plasma cutting |
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| CN101081461A (en) * | 2006-05-30 | 2007-12-05 | 天津钢管集团有限公司 | Technological process of incising pipes and chamfering by using intersecting cutter |
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| CN115922040A (en) * | 2022-12-12 | 2023-04-07 | 山东大学 | Self-adaptive compensation method and system for Y-shaped groove of intersecting branch pipe for plasma cutting |
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