CN1301159C - Stainless steel abnormal shaped bar material for strip screen and preparation method - Google Patents
Stainless steel abnormal shaped bar material for strip screen and preparation method Download PDFInfo
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- CN1301159C CN1301159C CNB031340474A CN03134047A CN1301159C CN 1301159 C CN1301159 C CN 1301159C CN B031340474 A CNB031340474 A CN B031340474A CN 03134047 A CN03134047 A CN 03134047A CN 1301159 C CN1301159 C CN 1301159C
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- line segment
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Abstract
The present invention relates to a stainless steel shaped bar material for strip screen meshes and a preparation method for the bar material, which belongs to the design of shaped steel materials and the research of preparation technology. The cross section of the stainless steel shaped bar material is composed of multiple straight line segments and included angles mutually formed by the straight line segments, and is similar to a geometric shape of the longitudinal cross section of a badminton. The technical characteristics of the geometric shape are decided by important technical parameters. The preparation method of the shaped materials comprises: drawing stainless steel wires, cold rolling by a rolling mill with different hole shapes, annealing, pickling, straightening and finishing. Three to five hole shapes similar to the shapes of the cross section of the stainless steel shaped materials form three to five rollers for cold rolling, and the hole shapes are controlled by a technical parameter group formed by a data group. The shaped materials can be used as filter screens in the industry such as paper making, pharmacy, food, etc. The preferable stainless steel shaped materials of the present invention for the industry of paper making is a 00 cr 7Ni13Mo2 material. The shaped materials have the advantages of high production yield, high intensity, large surface hardness and favorable abrasion resistance. Compared with a strip-shaped screen and a circular screen made of the same materials by the existing machine tools, the service life of the present invention is increased by two times.
Description
Technical field:
Belong to the research of design of stainless steel profile shapes and rolling mill practice thereof.The stainless steel heterotype rod and the preparation technology thereof of the bar screen cloth manufacturing of industries such as can be used for papermaking, pharmacy, food are provided especially.
Background technology:
The filter screen cloth that industries such as papermaking at present, pharmacy, food are used in corrosive medium generally adopts corrosion resistant plate to mill out the bar seam or get out the aperture manufacturing with drilling machine with milling machine, and the hardness of screen cloth is low, intensity difference, the shape difference of filtration channel, service life are low.How producing a kind of problem of being convenient to make installation, surface strength height, price is suitable, filtration channel is regular stainless steel heterotype rod is not resolved.
Summary of the invention:
The present invention is directed to the problems referred to above and design the stainless steel heterotype rod of a series of cross sectional shapes, and rolling mill practice, can produce the yield rate height, be convenient to install, the filtration channel performance is good, the stainless steel heterotype rod of material surface hardness height, long service life.
The present invention has designed as accompanying drawing 1,2, the stainless steel heterotype rod of 3 described cross sectional shapes, and its cross section is formed by many straight lines and by a plurality of angles that these straight lines constitute mutually, has formed the geometric figure that is similar to the shuttlecock longitudinal section.Form by root, middle part and upper topside three parts.Root section is nearly rhombus, semicircle or large semi-circular (shown in accompanying drawing 1,2,3) its outermost edge L
3Be of a size of 2.5～3.0mm.Straightway a and b and two the straightway c in their tops and d constituted outside the middle part was radiated open two by root, and the straightway a of these two outsides and b can be symmetrical (as shown in Figures 1 and 2); It also can be asymmetric (as shown in Figure 3).Having formed angle between straightway a and b outside these two, is 30 °～36 °.The junction of middle part and root forms a contraction section L
2, its length 1.3～2.2mm.The contact-making surface that root, middle part and contraction section have been formed when the stainless steel heterotype rod is installed in the future and the screen cloth wheel hub is connected and fixed.Radiating open straightway a and b top on the both sides, middle part respectively has one section Line Segment c and d, and balanced configuration, and its length has nothing in common with each other.Minor face c is 0.4～0.8mm, and long limit d is 1.15～2.0mm.The both sides spacing L of minor face c and long limit d
1Being the wideest position, heterotype rod cross section, is 3.0～4.2mm.The symmetrical center line OA of this two Line Segment c and d
1By the center of circle O of root fillet, be how much very important straight lines of heterotype rod cross section.Long limit d top point O in two Line Segment
1A top top line section e who becomes the heterotype rod at 72 °～75 ° of angles with long sideline section d is arranged.By top point O
1With root fillet center of circle O on line OO
1And, be exactly two rolls contacted straight lines in rolling to the extended line that both direction stretches out.The contacted straight line OO of this two roll
1Symmetrical center line OA with Line Segment c and d
1Intersect at root fillet center of circle O.Angle α between them
5Being very important characteristic parameter of heterotype rod cross section, is 12.5 °～17.1 °.The long sideline section of Line Segment minor face c and adjacent heterotype rod was adjacent when heterotype rod was installed on the wheel hub, and the minor face line segment of the heterotype rod that its parallel lines segment length limit d is adjacent with another is adjacent.Constituted the slit of width between the length sideline section of two adjacent heterotype rods less than 0.05mm.Affect the performance of filter by this slit.By long limit straightway top point O
1Draw one to the root fillet outer rim and be parallel to symmetrical center line OA
1Straight line, with the root fillet outer rim perpendicular to symmetrical center line OA
1Tangent line intersect at O
2. line segment O
1O
2Being the height overall H in heterotype rod cross section, is 6～8mm.
Stainless steel heterotype rod rolling mill practice of the present invention is formed by connecting by several operations.At first 1 passage of the stainless steel wire drawing of soft attitude, make the circle silk in fixed thread footpath, pass through each cold rolling passage of milling train of the different hole shapes shown in accompanying drawing 4,5 again, the linear velocity of roll is controlled at 0.15～0.25m/s when rolling, will use the cooling fluid cooling and lubricating when rolling, cooling fluid can be selected water-based, oiliness or emulsion.After cold rolling 3～5 passages, carry out an annealing softening to stocking and handle.Annealing can be adopted two kinds of different technologies, vacuum annealing or argon shield annealing.To clean section bar before the vacuum annealing, remove the greasy dirt on surface.Under 1050 ℃, carry out solution treatment, make profile shapes softening; This technology annealing softening is effective, but processing cost is higher.The argon shield annealing in process is another kind of annealing process, is 860 ℃ of processing in charging into the annealing furnace of argon gas; 860 ℃ of constant temperature 1～2 hour is slowly lowered the temperature with stove afterwards, reaches the purpose of softening profile shapes.The effect of the softening profile shapes of this technology also is good, but to after annealing, add pickling process one time, remove the oxide layer and the charring layer of material surface, but the mixed economy effect than vacuum annealing process for good, its processing cost only is equivalent to 30% of vacuum annealing process.
For annealing process pickling process under the argon shield, the volume share of the composition of pickle is: hydrofluoric acid 7.6%, nitric acid 15.2%, water 77.2%.
The operation of rolling that enters last hole shape after annealing in process under the general technology program situation, the profile shapes after rolling will be aligned finishing.Aligning tensile stress on the straightener is: greater than the yield limit σ of material
0.2, less than strength degree σ
bBetween a numerical value.
Designed the roll of the milling train of different cross section hole shape in order to roll out the present invention of stainless steel heterotype rod.Will determine the number of hole shape according to the cross section external form of heterotype rod, and each hole shape all to be adjusted hole shape corresponding techniques parameter (it is as shown in the table) according to the cross section and the rolling shedule of heterotype rod.
The adjustment important technological parameters is:
(1) the symmetrical center line OA of middle part upper end Line Segment c and d
1Contact wire OO with two rolls of milling train
1Intersect at the angle α of the fillet center of circle O of cross section root
5, its numerical value be 9 °～18 ° 15 ' between.
(2) root outermost edge size L
3, numerical value is 2.5～3.0mm.
(3) radiate the symmetrical center line OA of open two outsides straightway a and b and upper end Line Segment c and d by root
1Two angle α
4Numerical value is 9 °～19 °, α
6Numerical value is 15 °～21 °.
(4) length of middle part upper end Line Segment c and d, the numerical value of c line segment is 0～1.5mm, the numerical value of d line segment is 1.5～2.0mm.
(5) distance L between upper parallel straightway c and the d
1Numerical value is 3.0～5.6mm.
(6) the symmetrical center line OA of top margin line segment e and upper parallel straightway c and d
1The angle α of vertical line
1, numerical value is 15 °～23.3 °.
(7) top margin line segment e and adjacent radiate angle α between one of the open outside straightway a by root
2Numerical value is 88 °～102 °.
(8) the long limit d in the upper parallel straightway and two roll contact wire OO
1Angle α
3Numerical value be 15 ° 48 '～35 ° 48 '.
(9) top point O
1Vertical range O with root fillet outer rim tangent line
1O
2Be the cross section height overall H of heterotype rod, numerical value is 6～8mm.
(10) the contraction section L that is connected with the middle part of root
2, numerical value is 1.0～3.0mm.
(11), also has a root limit f if root is nearly rhombus
1With contraction edge a
1Angle α
7, numerical value is that 100 °～data more than 300 ° will be formed the data group of same number according to the number of hole shape.
Because the corrosive medium difference of bar screen cloth environment for use, stainless steel heterotype rod can select for use the stainless steel material of different model to come rolling.The material of the heterotype rod that the bar screen cloth of using for the paper industry filter paper pulp is used is to select for use 00Cr17Ni13Mo2 (GB2270-80) for good.
Adopt rolling mill practice of the present invention, find out the compact structure of metal structure through the metal metallographic structure analysis, the finished product rate can reach 97%.Owing to be the rolling profile shapes that obtains, make the materials processing sclerosis in the process, case hardness improves greatly, and the actual measurement average hardness value is more than HRC42.So just make the steel anti-wear performance good, the intensity height.The corrosion resistant plate that the existing use of ratio is the same trade mark mills the screen life-span of making the screen cloth of making and the manufacturing of holing and improves greatly, and prolong more than 2 times its service life.Heterotype rod is mounted to and has formed behind the bar grizzl(e)y completely and smooth less than the 0.05mm slit, helps filtration operation.
Description of drawings:
Accompanying drawing 1,2,3 is cross sectional shapes of three kinds of different stainless steel heterotype rods, and accompanying drawing 1 root is nearly rhombus, and accompanying drawing 2 roots are for most round, and accompanying drawing 3 roots are semicircle.
Accompanying drawing 4,5,6 is the cross sectional shape of three hole shapes in the stainless steel heterotype rod operation of rolling in accompanying drawing 1 cross section, concrete technical parameter is seen hole shape technical parameter data group table.
The specific embodiment:
Stainless steel heterotype rod is as shown in Figure 1 selected 00Cr17Ni13Mo2 (GB2270-80) stainless steel soft-state line blank for use, adopts passage of drawing to make line directly reach 5.2mm.Be cold rolling two passages of roll of passing through hole shape such as accompanying drawing 4,5 on the Φ 130mm milling train at roller diameter again, the roll line speed of roll is 0.2m/s, adopts oily cooling fluid.It is as shown in the table for the technical parameter data group of pass.
Hole shape technical parameter data group table
| Sequence number | Parameter name | First hole shape | Second hole shape | The |
| 1 | Center line OA and OO 1Angle α 5 | 15°48′ | 5°48′ | 5°48′ |
| 2 | Root physical dimension L 3mm | 3.2 | 2.8 | 2.3 |
| 3 | Outer linear section b and OA 1Angle α 4 | 9°59′ | 19° | 17°52′ |
| Outer linear section a and OA 1Angle α 6 | 15°48′ | 19° | 18° | |
| 4 | The length m m of Line Segment minor face c | 0 | 0 | 0.4 |
| The length m m of parallel lines segment length limit d | 1.5 | 1.5 | 1.5 | |
| 5 | The spacing L of Line Segment c and d 1mm | 3.2 | 2.1 | 1.3 |
| 6 | Top margin e and OA 1The angle α of vertical line 1 | 18° | 18° | 18° |
| 7 | Top margin e and outside straightway a angle α 2 | 92°12′ | 89° | 90° |
| 8 | Parallel lines segment length limit d and OO 1Angle α 3 | 35°8′ | 32°45′ | 15°48′ |
| 9 | Top point O 1With root outer rim tangent line vertical range Hmm | 6.4 | 6.5 | 6.5 |
| 10 | The contraction section L that root is linked to be 2mm | 3.2 | 2.1 | 1.3 |
| 11 * | Rhombus root limit f 1With contraction edge a 1Angle α 7 | 130° | 104°31′ | 100° |
*As root section is that semicircle or large semicircle do not have this data
Through the work hardening of two passages cold rolling back profile shapes, to anneal under argon shield with shaft furnace, stove is heated to 860 ℃, is incubated 2 hours, cools off with stove afterwards.Cooling back profile shapes is through overpickling, and pickle volume ratio composition is a hydrofluoric acid 7.6%, nitric acid 15.2%, water 77.2%.Remove the charring layer that the surface forms, carry out the cold rolling of the 3rd hole shape then.Shown in the data of three hole shapes are as above shown.Enter finishing procedure afterwards, on straightener heterotype rod is carried out tension straingtening, aligning stress is 400N/mm
2, last moulding.The finished product rate of this web has reached 97%, and finished surface average hardness value HRC45 is assembled into the drum bar grizzl(e)y through the user and uses in the paper mill, proves that its life-span is higher than same trade mark corrosion resistant plate and mills and make 2.2 times of the screen clothes made.
Claims (4)
1. a stainless steel heterotype rod that is used to make the bar shaped screen cloth is characterized in that being made up of root, middle part and upper topside three parts; Root section is nearly rhombus, semicircle or large semi-circular, its outward flange ultimate range (L
3) be of a size of 2.5-3.0mm; The middle part be by root radiate open two outside straightways (a, b) and two Line Segment in their tops (c d) constitutes, and (a forms angle between b), is 30 °-36 ° for two outside straightways; The middle part forms a contraction section with the junction of root, its distance (L
2) be 1.3-2.2mm; Root, middle part and contraction section have been formed the contact-making surface that stainless steel heterotype rod and screen cloth wheel hub are connected and fixed; (wherein the length of minor face Line Segment (c) is 0.4-0.8mm to the Line Segment that two length in top, middle part are different for c, d) balanced configuration, and the length of long limit Line Segment (d) is 1.5-2.0mm; Spacing (the L of minor face Line Segment (c) and long limit Line Segment (d)
1) be the wideest position, heterotype rod cross section, be 3.0-4.2mm; Two Line Segment (c, symmetrical center line (OA d)
1) by the root fillet center of circle (O), by the top point (O of the long limit Line Segment (d) in two Line Segment
1) a heterotype rod top line segment (e) that becomes 75 ° of-72 ° of angles to intersect with described long limit Line Segment (d) arranged; By top point (O
1) be exactly the straight line (OO that in rolling, contacts with the line and the extended line thereof of the root fillet center of circle (O) with roll
1); This straight line (OO
1) and two Line Segment (c, symmetrical center line (OA d)
1) intersect at the root fillet center of circle (O), the angle (α between them
5) be 12.5 °-17.1 °; Minor face Line Segment (c) when heterotype rod is installed on the wheel hub in two Line Segment is adjacent with the long limit Line Segment of adjacent heterotype rod, article two, the minor face Line Segment of the heterotype rod that the long limit Line Segment (d) in the Line Segment is then adjacent with another is adjacent, constituted the slit of width less than 0.05mm between the length limit Line Segment of adjacent two heterotype rods, the extended line of long limit Line Segment (d) is crossed point of contact (A with the root fillet outer rim
2) perpendicular to symmetrical center line (OA
1) tangent line intersect at (O
2), line segment (O
1O
2) be the height overall (H) in heterotype rod cross section, be 6-8mm.
2. the described preparation method who is used to make the stainless steel heterotype rod of bar shaped screen cloth of claim 1 is characterized in that may further comprise the steps: soft attitude stainless steel wire is pulled out the round steel wire that becomes to have alignment footpath; Pass through each cold rolling 1 passage of milling train of different passes again; After the rolling 3-5 passage stocking being carried out an annealing softening handles; Can select to clean or pickling according to different annealing process, remove greasy dirt, oxide layer, the charring layer of stocking appearance; In the end after rolling the finishing in pass, the bar section bar need be become a useful person at last through aligning, finishing; Aligning stress is at this material yield limit σ
0.2With strength degree σ
bBetween numerical value in choose.
3. the described preparation method who is used to make the stainless steel heterotype rod of bar shaped screen cloth of claim 2, each cold rolling 1 passage of milling train that it is characterized in that the different passes of described process, its pass is the rolling groove according to the cross-sectional shape design of different heterotype rods, and adjusts pass corresponding techniques parameter according to heterotype rod cross section and rolling shedule; The technical parameter of adjusting is: top, middle part parallel straight edge line segment (c, symmetrical center line (OA d)
1) with the straight line (OO that in rolling, contacts with roll
1) intersect at the angle (α in the root fillet center of circle, cross section (O)
5), its numerical value 9 °-18 ° 15 ' between; Root outward flange ultimate range (L
3) numerical value be 2.5-3.0mm; (a is b) with two top parallel straight edge line segments (c, symmetrical center line (OA d) to radiate open two outside straightways by root
1) an angle (α
4) numerical value be 9 °-19 °, another angle (α
6) numerical value be 15 °-21 °; Top, middle part parallel straight edge line segment (c, length d) is: minor face Line Segment (c) is 0-1.5mm, long limit Line Segment (d) is 1.5-2.0mm; Two top parallel straight edge line segments (c, d) spacing (L between
1) be 3.0-5.6mm; Top line segment (e) and two top Line Segment (c, d) symmetrical center line (OA
1) angle (α of vertical line
1) be 15 °-23.3 °; Top line segment (e) and radiate angle (α between the open outside straightway (a) by root
2) be 88 °-102 °; Long limit Line Segment (d) in two Line Segment and the straight line (OO that in rolling, contacts with roll
1) between angle (α
3) be 15 ° 48 '-35 ° 48 '; More than data based pass number form the data group of same number.
4. the described preparation method who is used to make the stainless steel heterotype rod of bar shaped screen cloth of claim 2, it is characterized in that describedly stocking is carried out annealing in process can adopting two kinds of annealing process: vacuum annealing and argon shield annealing process, wherein vacuum annealing process is that the section bar that will clean, remove surface and oil contaminant carries out solution treatment under 1050 ℃; Argon shield annealing is 860 ℃ of processing down under argon shield in annealing furnace, is incubated 1-2 hour and promptly slowly lowers the temperature with stove afterwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031340474A CN1301159C (en) | 2003-09-23 | 2003-09-23 | Stainless steel abnormal shaped bar material for strip screen and preparation method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031340474A CN1301159C (en) | 2003-09-23 | 2003-09-23 | Stainless steel abnormal shaped bar material for strip screen and preparation method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1537684A CN1537684A (en) | 2004-10-20 |
| CN1301159C true CN1301159C (en) | 2007-02-21 |
Family
ID=34323120
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031340474A Expired - Fee Related CN1301159C (en) | 2003-09-23 | 2003-09-23 | Stainless steel abnormal shaped bar material for strip screen and preparation method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1301159C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102451818A (en) * | 2010-10-29 | 2012-05-16 | 赵奎杰 | Profiled bar steel and roller thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US608895A (en) * | 1898-08-09 | Benjamin mcinnerney | ||
| CN2069430U (en) * | 1990-07-20 | 1991-01-16 | 上海造纸机械总厂沪光分厂 | Special-shaped screen board |
| JPH06285509A (en) * | 1993-04-02 | 1994-10-11 | Kawasaki Steel Corp | Manufacture of cold-rolled stainless steel strip |
| JPH07136428A (en) * | 1993-11-19 | 1995-05-30 | Hitachi Metals Ltd | Production of metal filter |
| CN1156065A (en) * | 1995-10-19 | 1997-08-06 | 于西纳·萨西罗公司 | Process for continuous production of rolled stainless steel sheet strip and continuous production line for carrying out process |
| US5727316A (en) * | 1993-12-13 | 1998-03-17 | Cae Screenplates Inc. | Method of manufacturing a screen cylinder and a screen cylinder produced by the method |
| CN1275419A (en) * | 2000-05-30 | 2000-12-06 | 叶红兵 | Technology for preparation of stainless steel board filter screen |
| CN1291922A (en) * | 1998-02-25 | 2001-04-18 | 尤吉纳股份有限公司 | Installation for making cold-rolled stainless steel bands |
-
2003
- 2003-09-23 CN CNB031340474A patent/CN1301159C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US608895A (en) * | 1898-08-09 | Benjamin mcinnerney | ||
| CN2069430U (en) * | 1990-07-20 | 1991-01-16 | 上海造纸机械总厂沪光分厂 | Special-shaped screen board |
| JPH06285509A (en) * | 1993-04-02 | 1994-10-11 | Kawasaki Steel Corp | Manufacture of cold-rolled stainless steel strip |
| JPH07136428A (en) * | 1993-11-19 | 1995-05-30 | Hitachi Metals Ltd | Production of metal filter |
| US5727316A (en) * | 1993-12-13 | 1998-03-17 | Cae Screenplates Inc. | Method of manufacturing a screen cylinder and a screen cylinder produced by the method |
| CN1156065A (en) * | 1995-10-19 | 1997-08-06 | 于西纳·萨西罗公司 | Process for continuous production of rolled stainless steel sheet strip and continuous production line for carrying out process |
| CN1291922A (en) * | 1998-02-25 | 2001-04-18 | 尤吉纳股份有限公司 | Installation for making cold-rolled stainless steel bands |
| CN1275419A (en) * | 2000-05-30 | 2000-12-06 | 叶红兵 | Technology for preparation of stainless steel board filter screen |
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| Publication number | Publication date |
|---|---|
| CN1537684A (en) | 2004-10-20 |
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