CN109465517A - A kind of thermal expansion amount control method of NC Flame Cutting part of the steel plate size - Google Patents
A kind of thermal expansion amount control method of NC Flame Cutting part of the steel plate size Download PDFInfo
- Publication number
- CN109465517A CN109465517A CN201811541072.1A CN201811541072A CN109465517A CN 109465517 A CN109465517 A CN 109465517A CN 201811541072 A CN201811541072 A CN 201811541072A CN 109465517 A CN109465517 A CN 109465517A
- Authority
- CN
- China
- Prior art keywords
- steel plate
- cutting
- thermal expansion
- radius
- ratio
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
- B23K7/10—Auxiliary devices, e.g. for guiding or supporting the torch
-
- 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
- B23K7/00—Cutting, scarfing, or desurfacing by applying flames
- B23K7/002—Machines, apparatus, or equipment for cutting plane workpieces, e.g. plates
- B23K7/003—Machines, apparatus, or equipment for cutting long articles, e.g. cast stands, plates, in parts of predetermined length
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Laser Beam Processing (AREA)
Abstract
The present invention discloses a kind of thermal expansion amount control method of NC Flame Cutting part of the steel plate size, comprising: according to molding part size is precut, calculates Ratio of long radius to short radius step；According to the size of the thickness of steel plate and part, shape, part corresponds to the mean temperature T of steel plate when estimating cutting1, calculate temperature difference Δ T=T1Temperature difference step is cut in the calculating of room temperature；According to the Ratio of long radius to short radius of part, the part cutting gap compensation K that Ratio of long radius to short radius is 1.0~1.3 is increased into unilateral temperature compensation amount △ t, Ratio of long radius to short radius is not less than to 1.2~1.3 part minor axis direction cutting gap compensation K1Increase unilateral side temperature compensation amount △ t1, and part major diameter direction cutting gap compensation K2Increase unilateral side temperature compensation amount △ t2Calculating temperature compensation amount step.The present invention increases corresponding temperature compensation amount according to part temperature rise and Ratio of long radius to short radius, to slot, to eliminate adverse effect of the thermal expansion to part size of NC Flame Cutting.
Description
Technical field
The invention belongs to NC Flame Cutting technical fields, and in particular to a kind of control method is simple, cutting parts size
Deviation is small and stablizes, the thermal expansion amount control method for the NC Flame Cutting part of the steel plate size that cutting efficiency is high.
Background technique
The high temperature that gas flame cuttiug (Flame Cutting) is generated using the burning of the imflammable gas such as acetylene, propane, natural gas
Carry out the rough machining method of cutting steel plate.In steel plate gas flame cuttiug field, with the development of science and technology, high-precision, it is easy to control, high
The semi-automatic flame cutting of efficiency and NC Flame Cutting are widely used.
But during actual NC Flame Cutting, cutting ignition temperature is cut on whole steel plate up to 1100~1150 DEG C
After cutting part and having and first have.The temperature near room temperature of steel plate when just cutting, but the cutting speed of part is quickly, especially when part is not
When very big, monolith steel plate also has not enough time to heating, thermal expansion when a part cutting is completed；Although have local heating,
But expansion receives the constraint of surrounding room temperature state steel plate, and the part size cut at this time is more accurate.With the increasing of cutting parts
More, heat continually enters, and steel billet temperature constantly increases, and thermal expansion amount also constantly increases.If not increasing by one to cutting gap compensation K
Fixed unilateral temperature compensation amount △ t, then the part cut again is cooled to room temperature the size measured and first cutting parts
The size measured just has dimensional discrepancy, and deviation increases with the increase of steel plate thermal expansion amount, (cuts until tending to balance
The heat dissipation of the heat input and steel plate cut reach one it is in a basic balance).This is because the thermal expansion that steel plate generates at different temperatures
Amount is different, results in the volume change of steel plate, and is not corrected to cutting gap compensation K and (increase temperature compensation amount △ t), then cuts
Cutting track would not change, then volume will reduce after the part cut is cooling, size will become smaller certainly.
In addition, in cutting process, due to that will make to the effect of the non-uniform heating of steel plate and cooling, material internal stress
Different degrees of bending or displacement --- i.e. thermal deformation occurs for the part cut, and specific manifestation is shape distortion and cut lengths
Deviation.
Currently, generally rule of thumb being cut for dimensional discrepancy caused by the thermal expansion amount during NC Flame Cutting
Darning, which is repaid, increases certain temperature compensation amount △ t on K, there is no feasible theoretical directions.Since each one experience is limited to, heat
The part size deviation that the value of expansion compensation amount △ t is often led to after cutting is larger and unstable, generally requires multiple trial cut
And can be only achieved scheduled precision after adjusting, not only cutting efficiency is low, but also trial cut higher cost, for small lot, high value
Plate does not allow multiple trial cut yet, greatly constrains the dimensional accuracy and production efficiency of NC Flame Cutting.
Summary of the invention
The purpose of the present invention is to provide a kind of control methods simply, cutting parts dimensional discrepancy is small and stablizes, cutting effect
The thermal expansion amount control method of the high NC Flame Cutting part of the steel plate size of rate.
What the object of the invention was realized in: including calculating Ratio of long radius to short radius, calculating the cutting temperature difference, calculating temperature compensation amount
Step specifically includes:
A, it calculates Ratio of long radius to short radius: according to molding part size is precut, calculating the Ratio of long radius to short radius of part；
B, calculate the cutting temperature difference: according to the size of the thickness of steel plate and part, shape, part corresponds to the flat of steel plate when estimating cutting
Equal temperature T1, then calculate temperature difference Δ T=T1Room temperature；
C, temperature compensation amount is calculated: according to the Ratio of long radius to short radius of part, the part cutting gap compensation K for being 1.0~1.3 by Ratio of long radius to short radius
Increase unilateral temperature compensation amount △ t, Ratio of long radius to short radius is not less than to 1.2~1.3 part minor axis direction cutting gap compensation K1Increase
Unilateral temperature compensation amount △ t1, and part major diameter direction cutting gap compensation K2Increase unilateral side temperature compensation amount △ t2。
Compared with the prior art, the invention has the following beneficial effects:
1, the present invention is estimated and the calculating of Ratio of long radius to short radius by the temperature rise to cutting parts, is classified according to the Ratio of long radius to short radius of part and is increased
Add because thermally expanding the compensation rate to slot, so that thermal expansion is to cutting parts size when reducing or even eliminate NC Flame Cutting
Adverse effect.
2, the temperature rise when present invention is when cut according to the line of apsides of part, establishes effective flame-cutting steel plate
The temperature compensation amount mechanism and method of part slot, not only get rid of tradition compensated by operator's experience it is existing
Experience limitation, the parts size precision after cutting are high and reliable and stable；And traditional trial cut can be effectively reduced or even cancel,
So as to improve the efficiency of NC Flame Cutting and reduce the cost.
3, the present invention takes reserved clout respectively, opens and cut also in cutting according to the part shape and material condition of cutting
It kerf, cutting mode and plate is corresponded to part the different modes such as is fixed, to control plate in cutting Shi Yinre
Displacement caused by expansion and deformation achieve the purpose that parts size precision after raising cutting.
Therefore, the present invention is simple with control method, cutting parts dimensional discrepancy is small and stablizes, the spy that cutting efficiency is high
Point.
Detailed description of the invention
Fig. 1 is embodiments of the present invention steel plate ingredient schematic diagram；
Fig. 2 is the Z-shaped curve entrance schematic diagram of the present invention.
Specific embodiment
Below with reference to embodiment, the present invention is further illustrated, but the present invention is limited in any way,
According to the teachings of the present invention any change made by or replacement, all belong to the scope of protection of the present invention.
The present invention includes calculating Ratio of long radius to short radius, calculating the cutting temperature difference, calculate temperature compensation amount step, is specifically included:
A, it calculates Ratio of long radius to short radius: according to molding part size is precut, calculating the Ratio of long radius to short radius of part；
B, calculate the cutting temperature difference: according to the size of the thickness of steel plate and part, shape, part corresponds to the flat of steel plate when estimating cutting
Equal temperature T1, then calculate temperature difference Δ T=T1Room temperature；
C, temperature compensation amount is calculated: according to the Ratio of long radius to short radius of part, the part cutting gap compensation K for being 1.0~1.3 by Ratio of long radius to short radius
Increase unilateral temperature compensation amount △ t, Ratio of long radius to short radius is not less than to 1.2~1.3 part minor axis direction cutting gap compensation K1Increase
Unilateral temperature compensation amount △ t1, and part major diameter direction cutting gap compensation K2Increase unilateral side temperature compensation amount △ t2。
Unilateral temperature compensation amount △ t, △ t in the step C1With △ t2Are as follows:
The unilateral temperature compensation amount=temperature difference Δ T × corresponding length L of material thermal expansion coefficient α × part.
Ratio of long radius to short radius is not less than 1.2~1.3 part minor axis direction cutting gap compensation K in the step C1It is swollen to increase unilateral heat
Swollen compensation rate △ t1, while the temperature compensation amount △ t in major diameter direction2With the temperature compensation amount △ t in minor axis direction1It is total poor
Value 2 × (△ t2-△t1) directly increase in Numerical control cutting program.
As shown in Fig. 2, cut since the clout part of steel plate when the NC Flame Cutting part of the steel plate, or cannot be
When clout is cut, is then cut from steel plate edge and cut a Z-shaped curve entrance at edge.
When the NC Flame Cutting Ratio of long radius to short radius is greater than 2~3 elongate steel plate part, steel plate discharge is in length direction
Reserve the slot of the 5~10mm wide of clout of 2~20mm in one end.
Discharge is 2~10mm in the unilateral reserved clout width of length direction when light plate thickness of the present invention is not more than 100mm,
Steel plate thickness in 100~150mm discharge the unilateral reserved clout width of length direction be 10~20mm.
Light plate thickness of the present invention opens perforation from reserved clout when being not more than 100mm and is cut.
Light plate thickness of the present invention directly opens perforation at reserved clout end in 100~150mm or more than reserved
It drills on material, is cut from bore position and stop cutting and cooling after being cut at the reserved clout of the steel plate other end in the width direction
Cutting width direction again after 10~30min.
In the present invention on NC Flame Cutting steel plate when the length direction of part, the slot along part length direction is at least set
It is equipped with one section of " bridging " to connect two sides part.
It is corresponded on steel plate position in precut part with weight or compression bar pressure before the NC Flame Cutting part of the steel plate
It fastens.
Embodiment
It makes the steel plate of 4 85 tons of ladles and blanking, part of the steel plate row as shown in Figure 1 is carried out with conventional NC Flame Cutting
Material, when cutting gap compensation K is not added in thermal expansion amount △ t, since element size is smaller, quantity is larger, discharge is intensive, cutting
When heat largely input steel plate, dotted portion leads to dimensional discrepancy occur after components are cooling due to thermal expansion in figure.Specific ginseng
Number is as follows:
Blanking moiety by weight are as follows: 139.31 tons, blanking qualification rate is pressed: 95%, plate average price: 5000 yuan/ton, labor wage:
332 yuan/day/people, general consumption: 120 yuan/ton, steel scrap valence: 2500 yuan/ton.
Caused by costing bio disturbance it is as follows:
Size is not inconsistent weight: 139.31 tons × 5%=6.96 ton,
Labor wage: 332 × 6.96 × 2=2312 yuan,
General consumption: 120 × 6.96 × 2=1670.4 yuan,
Steel plate price: 6.96 × 5000=34800 yuan,
Steel scrap value: 6.96 × 2500=17400 yuan,
Total expense: 2312+1670.4+34800-17400=21382.4 yuan,
Calculating: 4 85 tons of ladle plate cutting qualification rates 95% is to sum up stated, it, may if do not implemented effectively to control thermal expansion amount measure
It causes damages: 21382.4 yuan.
The influence for considering part cutting gap compensation K shown in FIG. 1 thermal expansion amount, increases separately unilateral temperature compensation amount,
Detailed process is as follows:
S100: molding part size is precut according to difference, calculates the Ratio of long radius to short radius of part；
S200: according to the size of the thickness of steel plate and part, shape, ingredient density, different parts are estimated respectively in cutting
Mean temperature T1, then calculate temperature difference Δ T=T of part1-20；
S300: according to the Ratio of long radius to short radius of part, the part cutting gap compensation K that Ratio of long radius to short radius is 1.0~1.3 is increased into unilateral thermal expansion
Ratio of long radius to short radius is not less than 1.2~1.3 part minor axis direction cutting gap compensation K by compensation rate △ t1Increase unilateral temperature compensation
Measure △ t1, while the temperature compensation amount △ t in major diameter direction2With the temperature compensation amount △ t in minor axis direction1Total difference 2 ×
(△ t2-△t1) directly increase on cutting process.
Pass through above-mentioned calculating and increases the unilateral temperature compensation amount of different part cutting gap compensation K, each part after cutting
Within the allowable range, there is not overproof waste product in dimensional discrepancy after cooling, cost-saved 21382.4 yuan corresponding.
Claims (10)
1. a kind of thermal expansion amount control method of NC Flame Cutting part of the steel plate size, it is characterised in that including calculating the line of apsides
Than, calculate cutting the temperature difference, calculate temperature compensation amount step, specifically include:
A, it calculates Ratio of long radius to short radius: according to molding part size is precut, calculating the Ratio of long radius to short radius of part；
B, calculate the cutting temperature difference: according to the size of the thickness of steel plate and part, shape, part corresponds to the flat of steel plate when estimating cutting
Equal temperature T1, then calculate temperature difference Δ T=T1Room temperature；
C, temperature compensation amount is calculated: according to the Ratio of long radius to short radius of part, the part cutting gap compensation K for being 1.0~1.3 by Ratio of long radius to short radius
Increase unilateral temperature compensation amount △ t, Ratio of long radius to short radius is not less than to 1.2~1.3 part minor axis direction cutting gap compensation K1Increase
Unilateral temperature compensation amount △ t1, and part major diameter direction cutting gap compensation K2Increase unilateral side temperature compensation amount △ t2。
2. the thermal expansion amount control method of NC Flame Cutting part of the steel plate size according to claim 1, it is characterised in that
Unilateral temperature compensation amount △ t, △ t in the step C1With △ t2Are as follows:
The unilateral temperature compensation amount=temperature difference Δ T × corresponding length L of material thermal expansion coefficient α × part.
3. the thermal expansion amount control method of NC Flame Cutting part of the steel plate size according to claim 1, it is characterised in that
Ratio of long radius to short radius is not less than 1.2~1.3 part minor axis direction cutting gap compensation K in the step C1Increase unilateral temperature compensation amount
△t1, while the temperature compensation amount △ t in major diameter direction2With the temperature compensation amount △ t in minor axis direction1Total difference 2 × (△
t2-△t1) directly increase in Numerical control cutting program.
4. the thermal expansion amount control method of NC Flame Cutting part of the steel plate size according to claim 1, it is characterised in that
It is cut since the clout part of steel plate when the NC Flame Cutting part of the steel plate, or cannot be when clout rises and cuts, then from steel
The cutting of edges of boards edge simultaneously cuts a Z-shaped curve entrance at edge.
5. the thermal expansion amount control method of NC Flame Cutting part of the steel plate size according to claim 1, it is characterised in that
When the NC Flame Cutting Ratio of long radius to short radius is greater than 2~3 elongate steel plate part, steel plate discharge is reserved in length direction one end
The clout of 2~20mm.
6. the thermal expansion amount control method of NC Flame Cutting part of the steel plate size according to claim 5, it is characterised in that
Discharge is 2~10mm in the unilateral reserved clout width of length direction when steel plate thickness is not more than 100mm, steel plate thickness 100~
Discharge is 10~20mm in the unilateral reserved clout width of length direction when 150mm.
7. the thermal expansion amount control method of NC Flame Cutting part of the steel plate size according to claim 6, it is characterised in that
Steel plate thickness opens perforation from reserved clout when being not more than 100mm and is cut.
8. the thermal expansion amount control method of NC Flame Cutting part of the steel plate size according to claim 6, it is characterised in that
Steel plate thickness directly opens perforation at reserved clout end in 100~150mm or drills on reserved clout, from drilling position
Set cut cut at the reserved clout of the steel plate other end in the width direction after stop cutting and cut again after cooling 10~30min
Width direction.
9. the thermal expansion amount control method of NC Flame Cutting part of the steel plate size according to claim 6, it is characterised in that
On NC Flame Cutting steel plate when the length direction of part, along part length direction slot at least provided with one section to connect two
" bridging " of side part.
10. according to claim 1 to the thermal expansion amount controlling party of NC Flame Cutting part of the steel plate size described in 9 any one
Method, it is characterised in that corresponded on steel plate position in precut part with weight or pressure before the NC Flame Cutting part of the steel plate
Bar is fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811541072.1A CN109465517A (en) | 2018-12-17 | 2018-12-17 | A kind of thermal expansion amount control method of NC Flame Cutting part of the steel plate size |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811541072.1A CN109465517A (en) | 2018-12-17 | 2018-12-17 | A kind of thermal expansion amount control method of NC Flame Cutting part of the steel plate size |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109465517A true CN109465517A (en) | 2019-03-15 |
Family
ID=65676058
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811541072.1A Pending CN109465517A (en) | 2018-12-17 | 2018-12-17 | A kind of thermal expansion amount control method of NC Flame Cutting part of the steel plate size |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109465517A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110645953A (en) * | 2019-11-06 | 2020-01-03 | 湖南华菱湘潭钢铁有限公司 | Prediction method for hot-cutting deformation of strip-shaped steel plate |
| CN110666238A (en) * | 2019-09-26 | 2020-01-10 | 太原科技大学 | Shear blade gap adjusting device in hot shearing process of hobbing shear and calculating method thereof |
| CN111302608A (en) * | 2020-03-30 | 2020-06-19 | 苏州胜利精密制造科技股份有限公司 | Processing and forming method of curved surface glass with holes |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0446672A (en) * | 1990-06-14 | 1992-02-17 | Fuaiaaransu Kogyo Kk | Manufacture of lance pipe with connector and lance pipe with connector |
| CN102489823A (en) * | 2011-11-28 | 2012-06-13 | 武汉船用机械有限责任公司 | Flame cutting method of ultra-long single-sided rack |
| CN105728886A (en) * | 2014-12-09 | 2016-07-06 | 重庆金国凯畅机床厂 | Flame cutting technology |
-
2018
- 2018-12-17 CN CN201811541072.1A patent/CN109465517A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0446672A (en) * | 1990-06-14 | 1992-02-17 | Fuaiaaransu Kogyo Kk | Manufacture of lance pipe with connector and lance pipe with connector |
| CN102489823A (en) * | 2011-11-28 | 2012-06-13 | 武汉船用机械有限责任公司 | Flame cutting method of ultra-long single-sided rack |
| CN105728886A (en) * | 2014-12-09 | 2016-07-06 | 重庆金国凯畅机床厂 | Flame cutting technology |
Non-Patent Citations (3)
| Title |
|---|
| 张瑞: "《钢板火焰切割的割件尺寸控制》", 《宽厚板》 * |
| 茅裕芳等: "《浅谈数控火焰切割钢板零件的尺寸保证》", 《金属加工(热加工)》 * |
| 郑叔芳等: "《光学工具法安装技术》", 30 April 1988 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110666238A (en) * | 2019-09-26 | 2020-01-10 | 太原科技大学 | Shear blade gap adjusting device in hot shearing process of hobbing shear and calculating method thereof |
| CN110645953A (en) * | 2019-11-06 | 2020-01-03 | 湖南华菱湘潭钢铁有限公司 | Prediction method for hot-cutting deformation of strip-shaped steel plate |
| CN111302608A (en) * | 2020-03-30 | 2020-06-19 | 苏州胜利精密制造科技股份有限公司 | Processing and forming method of curved surface glass with holes |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109465517A (en) | A kind of thermal expansion amount control method of NC Flame Cutting part of the steel plate size | |
| CN101844215B (en) | Dynamic secondary cooling control method for slab continuous casting based on double-cooling mode | |
| CN101441444B (en) | Sintering status control method in sintering process | |
| CN102560081B (en) | Heating furnace energy-saving control method based on strip steel mechanical property forecasting model | |
| CN103397171B (en) | Method for determining furnace-temperature set value of billet heating furnace | |
| CN103071774B (en) | Method for controlling surface temperature of casting blank at straightening point of continuous casting machine | |
| CN101561224A (en) | Method for controlling combustion atmosphere in large-scale walking beam type plate blank heating furnace | |
| KR101709623B1 (en) | Method for controlling solidification completion position and device for controlling solidification completion position | |
| CN113770318A (en) | Method and device for controlling casting force and roll gap of casting roll in thin strip continuous casting | |
| BR0210466A (en) | Method for Production of High Chromium Seamless Steel Pipe Systems | |
| JP2009090309A (en) | Continuous casting method for medium carbon steel preventing crack of slab by monitoring heat flux of mold copper plate | |
| CN110566962A (en) | Combustion control method of heat accumulating type single-burner aluminum melting furnace with adjustable air-fuel ratio | |
| CN108984943A (en) | Heating furnace steel billet temperature trace model modification method | |
| JP2012045552A (en) | Continuous casting method of steel cast slab | |
| JP5909907B2 (en) | Slab cutting method in continuous casting | |
| CN113878100B (en) | Method for cutting long billet | |
| JP2008183607A (en) | Continuous casting method of steel | |
| EP2977125B1 (en) | Sand casting method | |
| CN112151129B (en) | Technological method for accurately setting width dimension of lower opening of continuous casting slab crystallizer | |
| KR102643833B1 (en) | Method of increasing prediction consistency of steel component during mixed grade continuous casting | |
| JP5119483B2 (en) | Gas cutting method for continuous cast slabs | |
| JP4653623B2 (en) | Steel sheet cooling control method | |
| KR101246195B1 (en) | Method for producing hardened steel slab in heat treatment | |
| CN114990311B (en) | Heating control method for large-section high-carbon chromium bearing steel continuous casting billet | |
| CN117102452A (en) | Method for improving metal yield of casting blank |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190315 |
|
| RJ01 | Rejection of invention patent application after publication |