WO2023098123A1 - 一种单齿履带板开坯孔型及热轧方法 - Google Patents

一种单齿履带板开坯孔型及热轧方法 Download PDF

Info

Publication number
WO2023098123A1
WO2023098123A1 PCT/CN2022/109504 CN2022109504W WO2023098123A1 WO 2023098123 A1 WO2023098123 A1 WO 2023098123A1 CN 2022109504 W CN2022109504 W CN 2022109504W WO 2023098123 A1 WO2023098123 A1 WO 2023098123A1
Authority
WO
WIPO (PCT)
Prior art keywords
plane
slope
billet
inclined plane
hole
Prior art date
Application number
PCT/CN2022/109504
Other languages
English (en)
French (fr)
Inventor
霍喜伟
孙晓庆
尚国明
纪进立
李承�
雷刚
Original Assignee
山东钢铁股份有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 山东钢铁股份有限公司 filed Critical 山东钢铁股份有限公司
Publication of WO2023098123A1 publication Critical patent/WO2023098123A1/zh

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/08—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling structural sections, i.e. work of special cross-section, e.g. angle steel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
    • B21B27/02—Shape or construction of rolls
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Definitions

  • the invention relates to the technical field of section steel production, in particular to a single-tooth track shoe blanking pass and a hot rolling method.
  • Crawler is a commonly used walking part of construction machinery. Compared with tires, crawler can be used in various harsh working environments, and has the advantages of wear resistance and impact resistance.
  • Track shoes are metallurgical products necessary for the production of tracks, and there are various forming methods, such as casting forming, stamping forming, machining forming and rolling forming. Compared with casting, stamping and machining methods, the rolling forming method has high efficiency, low cost and excellent comprehensive performance, so it has been more and more widely used.
  • the molding of track shoes, especially single-tooth track shoes with high degree of asymmetry has to be produced by manually assisting the biting of rolling parts, which greatly increases the risk of personal injury accidents.
  • Chinese patent CN201310393973.1 discloses a single-tooth track shoe semi-open and semi-closed billet mold and a single-tooth track shoe forging method. Its purpose is to provide a single-tooth track shoe semi-open and semi-closed billet mold which can be used for single-tooth track shoe pre-forging billet, and the obtained forgings are easier to carry out final forging, and to provide a forging process, A single-tooth track shoe forging method that can be used for forging a single-tooth track shoe. The forging method produces track shoes, and the yield is low and the cost is high.
  • the production efficiency is low and the energy consumption is high.
  • 4 holes, 5 holes, and 8 holes all have unstable support at the bottom of the rolled piece, and it is easy to tilt or fall over after turning over the steel, which affects the outstanding problems of subsequent rolling. Not only is the dimensional accuracy difficult to control, but also the rolled piece needs to rely on manual assistance. Biting in is not conducive to the improvement of production rhythm and safety risk control.
  • the object of the present invention is to provide a single-tooth track shoe billet opening pass and hot rolling method. While obtaining a good intermediate billet shape, the bottom of the billet can be supported stably, and it will not tilt or fall over after turning over the steel, without manual assistance. High-efficiency hot-rolled production of single-tooth track shoes can be realized.
  • the present invention provides the following technical solutions:
  • a single-tooth track shoe blanking pass type including a first blanking hole and a second blanking hole, the first blanking hole is formed by the first upper roller and the first lower roller of the blanking machine, and the first blanking hole
  • the second billet hole is formed by the second upper roll and the second lower roll of the billet machine, wherein the first billet hole is the front hole, and the first billet hole is used to extrude the rectangular continuous casting billet into a mountain-shaped intermediate billet comprising a right-curved limb, a first central column, and a left-curved limb; the second billet hole is a rear hole, and the second billet hole is used to extrude the mountain-shaped intermediate billet into Inverted T-shaped intermediate blank including right level leg, second center column and left level leg.
  • the lower surface of the first upper roller includes a first slope, a first plane, a second slope, a second plane, a third slope, a third plane and The fourth slope, the first slope, the first plane, the second slope, the second plane, the third slope, the third plane and the fourth slope are sequentially connected, the The first plane and the third plane are located on the same horizontal plane, the first inclined plane, the second inclined plane, the third inclined plane and the fourth inclined plane are located above the first plane, and the second inclined plane is located above the first plane.
  • the plane is parallel to the first plane, and the second slope, the second plane and the third slope form trapezoidal grooves on the lower surface of the first upper roller.
  • the upper surface of the first lower roller includes a fifth inclined plane, a fourth plane and a sixth inclined plane, and the fifth inclined plane, the fourth plane and the sixth plane
  • the sixth slope is connected in sequence, and the fifth slope and the sixth slope are both located above the fourth plane; preferably, the angle ⁇ between the fifth slope and the fourth plane is 50°-88°, the angle ⁇ between the fourth plane and the sixth slope is 50°-88°; preferably, between the fifth slope and the fourth plane, the sixth
  • the arcs with a radius of 25mm-60mm make a smooth transition between the four planes and the sixth slope.
  • the lower surface of the second upper roller includes a seventh inclined plane, an eighth inclined plane, a ninth inclined plane, a fifth plane, a tenth inclined plane and an eleventh inclined plane and the twelfth slope, the seventh slope, the eighth slope, the ninth slope, the fifth plane, the tenth slope, the eleventh slope and the twelfth slope in turn Connection;
  • the fifth plane is arranged horizontally, the lower ends of the seventh slope and the twelfth slope are located on the same horizontal plane, and the eighth slope and the eleventh slope are both located above the twelfth slope , the ninth slope and the tenth slope are located above the eleventh slope, the ninth slope, the fifth plane and the tenth slope are on the lower surface of the second upper roller Form trapezoidal grooves.
  • the angle ⁇ between the seventh inclined plane and the horizontal plane is 60°-88°; the included angle ⁇ between the eighth inclined plane and the horizontal plane is 0°-30°; the angle ⁇ between the ninth slope and the fifth plane is 70°-88°; the angle ⁇ between the tenth slope and the fifth plane is 70° -88°; the angle ⁇ between the eleventh slope and the horizontal plane is 0°-30°; the angle ⁇ between the twelfth slope and the horizontal plane is 60°-88°; preferably, the first Between the seventh inclined plane and the eighth inclined plane, between the ninth inclined plane and the fifth plane, between the fifth plane and the tenth inclined plane, between the eleventh inclined plane and the twelfth inclined plane, all pass through an arc with a radius of 10mm-30mm Smooth transition: the transition between the eighth slope and the ninth slope, and between the tenth slope and the eleventh slope is smooth through a circular arc with a radius of 50mm
  • the upper surface of the second lower roller includes a sixth plane, an arc segment and a seventh plane, and the sixth plane, the arc segment and The seventh plane is connected sequentially, the sixth plane and the seventh plane are located on the same horizontal plane, the arc segment is located above the sixth plane, the radius of the arc segment is 50 mm to 120 mm, and the circle The length of the arc segment is 80mm-200mm.
  • the width of the continuous casting billet is not less than the width W1 of the fourth plane on the upper surface of the first lower roll, and the width of the continuous casting billet The width is not greater than the width W2 of the first billet hole, and the ratio of height to width of the continuous casting billet is 0.7-1.3.
  • a hot-rolling method for a single-tooth track shoe which uses the above-mentioned single-tooth track shoe blanking pass, including the following steps:
  • Step 1) Use the blanking machine to open the rectangular continuous casting billet.
  • the continuous casting billet is successively rolled from 1 to 4 first billet opening holes, and the continuous casting billet is gradually rolled out of the right curved limb, the first middle The column and the left curved limb, the first inclined plane and the first plane cooperate with the fifth inclined plane and the fourth plane to form the right bent limb, the second inclined plane, the second plane and the third inclined plane cooperate with the fourth plane to form the first center column, the fifth The three planes and the fourth inclined plane form the left curved limb with the fourth plane and the sixth inclined plane, and the cross-section of the continuous casting billet changes from a rectangle to a mountain shape to obtain a mountain-shaped intermediate billet;
  • step 2) the mountain-shaped intermediate billet obtained in step 1) is further opened by using a blanking machine, and the mountain-shaped intermediate billet is rolled by 1-4 second blanking holes, and the seventh inclined plane and the eighth inclined plane are connected with the sixth inclined plane.
  • Plane fit so that the right curved limb of the mountain-shaped intermediate billet is gradually straightened and thinned to form a right flat limb;
  • the ninth inclined plane, the fifth plane and the tenth inclined plane cooperate with the arc section, so that the first center column is gradually thinned ,
  • the long height forms the second center column, and the fourth plane is pressed out of the arc segment;
  • the eleventh inclined plane and the twelfth inclined plane cooperate with the seventh plane, so that the left curved limb is gradually straightened and thinned to form a left flat Limbs, the cross section of the mountain-shaped intermediate billet changes from the mountain-shaped to the inverted T-shaped, and the inverted T-shaped intermediate billet is obtained;
  • Step 3 Rough rolling the inverted T-shaped intermediate billet obtained after billeting through the first billet hole and the second billet hole, reducing the thickness of the billet and increasing the width of the billet;
  • Step 4) Perform finish rolling on the billet after rough rolling in step 3), and accurately form the parts of the billet corresponding to the main plate, side wings and tooth plate of the single-tooth track shoe to obtain a single-tooth track shoe, wherein, the right flat The limb is rolled into the main plate of the single-tooth track shoe, the second center column is rolled into the flank of the single-tooth track shoe, and the left flat leg is rolled into the tooth plate of the single-tooth track shoe.
  • the present invention discloses a single-tooth track shoe blanking pass and a hot rolling method.
  • the rectangular continuous casting billet is blanked through the first blanking hole and the second blanking hole of the blanking machine, and the billet after blanking The billet is then subjected to rough rolling and finish rolling to obtain the single-tooth track shoe.
  • the invention significantly reduces the dependence on the size of the billet, and can use a smaller billet to produce a larger-sized single-tooth track shoe, which has a better effect of energy saving and consumption reduction;
  • the unique design of the first billet opening and the second billet opening eliminates the problems of low efficiency, poor safety, and poor dimensional accuracy caused by billet instability, and realizes the efficient production of single-tooth track shoes.
  • Fig. 1 is a schematic structural diagram of a first blank opening hole according to an embodiment of the present invention.
  • Fig. 2 is a schematic structural view of a second blank opening hole according to an embodiment of the present invention.
  • Fig. 3 is a schematic structural view of a single-tooth track shoe according to an embodiment of the present invention.
  • Fig. 4 is another structural schematic diagram of the first blank opening hole according to an embodiment of the present invention.
  • Fig. 5 is another structural schematic diagram of the second blank opening hole according to an embodiment of the present invention.
  • a single-tooth track shoe opening pattern is provided.
  • one end of the side wing 53 is connected to one end of the main board 51
  • the other end of the side wing 53 extends away from the main board 51
  • one end of the tooth plate 52 is connected to the lower surface of the main board 51 .
  • the blanking pass type includes a first blanking hole 1 and a second blanking hole 3, the first blanking hole 1 is formed by the first upper roll and the first lower roll of the blanking machine, and the second blanking hole 3 is formed by the blanking machine.
  • the second upper roll and the second lower roll of the billet machine are formed, wherein the first billet hole 1 is the front hole, and the first billet hole 1 is used to extrude the rectangular continuous casting billet to include the right curved limb 11, the second A mountain-shaped intermediate blank of a central column 12 and a left curved limb 13; the second blank opening hole 3 is a rear hole, and the second blank opening hole 3 is used to extrude the mountain-shaped intermediate blank to include the right flat limb 31, the second middle blank The inverted T-shaped intermediate blank of the post 32 and the left level leg 33.
  • the lower surface of the first upper roller comprises a first slope 14, a first plane 15, a second slope 16, a second plane 17, a third slope 18, a third plane 19 and a fourth slope 20.
  • the first slope 14, the first plane 15, the second slope 16, the second plane 17, the third slope 18, the third plane 19 and the fourth slope 20 are connected in sequence, and the first plane 15 and the third plane 19 are located at the same Horizontal plane, the first slope 14, the second slope 16, the third slope 18 and the fourth slope 20 are all located above the first plane 15, the second plane 17 is parallel to the first plane 15, the second slope 16, the second plane 17 and the third slope 18 form trapezoidal grooves on the lower surface of the first upper roller.
  • the upper surface of the first lower roller comprises the fifth inclined plane 21, the fourth plane 22 and the sixth inclined plane 23, the fifth inclined plane 21, the fourth plane 22 and the sixth inclined plane 23 are connected successively, and the fifth inclined plane 21 and the sixth inclined plane 23 are both Located above the fourth plane 22 .
  • the first bevel 14 and the first plane 15 cooperate with the fifth bevel 21 and the fourth plane 22 to form the right bent limb 11 of the first blanking hole 1, the second bevel 16, the second plane 17 and the third bevel 18 and the fourth bevel
  • the plane 22 cooperates to form the first central column 12 of the first blanking hole 1, and the third plane 19 and the fourth inclined surface 20 form the left curved limb 13 of the first blanking hole 1 with the fourth plane 22 and the sixth inclined surface 23.
  • Both the curved limb 11 and the left curved limb 13 are curved structures, and the curved design of the right curved limb 11 and the left curved limb 13 can make the parts corresponding to the main board 51, the tooth plate 52 and the side wings 53 of the blank and the single-tooth track shoe 5
  • the width and height are maximized, and the single-tooth track shoe 5 can be rolled out of a smaller billet. The rolling passes and passes are less, the production process is efficient, and the energy consumption is low, which is in line with the national green and low-carbon industrial policy.
  • the combination of the fifth slope 21, the fourth plane 22 and the sixth slope 23 makes the bottom of the first opening hole 1 form a groove structure, so that the first upper roller and the first lower roller of the blanking machine can firmly clamp the blank, Ensure the stable support state of the bottom of the billet, realize stable rolling, and then realize the control of the dimensional accuracy of the billet, effectively reduce the degree of torsion and bending of the billet during the rolling process, and prevent the influence of subsequent billets due to tilting or overturning Rolling does not need to rely on manual assistance to bite the rolled piece, the production rhythm is effectively improved, and the safety risk is reduced.
  • the angle ⁇ between the first slope 14 and the first plane 15 is 30°-70° (such as: 30°, 35°, 40°, 45°, 50°, 55° , 60°, 65°, 70°), the design of the inclination angle of the first inclined plane 14 can make the billet rolling stable in the first blanking hole 1, and provide a suitable length for the right flat leg 31 of the second blanking hole 3 blank to prevent insufficient or excessive metal;
  • the angle ⁇ between the second slope 16 and the first plane 15 is 65°-88° (for example: 65°, 67°, 70°, 72°, 74° °, 76°, 78°, 80°, 82°, 84°, 86°, 88°);
  • the angle ⁇ between the third slope 18 and the third plane 19 is 65°-88° (for example: 65° , 67°, 70°, 72°, 74°, 76°, 78°, 80°, 82°, 84°, 86°, 88°);
  • the included angle ⁇ between the fifth inclined plane 21 and the fourth plane 22 is 50°-88° (such as: 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 88° ), the angle ⁇ between the fourth plane 22 and the sixth slope 23 is 50°-88° (for example: 50°, 55°, 60°, 65°, 70°, 75°, 80°, 85°, 88°); in an embodiment of the present invention, ⁇ is 45°, ⁇ is 75°, ⁇ is 75°, ⁇ is 45°, ⁇ is 62°, and ⁇ is 62°.
  • Appropriate arc transitions are adopted between the second slope 16 and the second plane 17 and between the second plane 17 and the third slope 18 .
  • a radius of 10mm-30mm (such as: 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm) arc smooth transition.
  • the length of the first slope 14 is B1
  • the vertical distance between the second plane 17 and the first plane 15 is H1
  • B1:H1 0.7 ⁇ 2:1
  • the design of the inclination angle and length of the first bevel 14 can make the billet rolled stably in the first billet opening 1, and provide a billet with a suitable length for the right flat leg 31 of the second billet opening 3, preventing metal deficiency or excess. many phenomena.
  • the design of the inclination angle and length of the fourth inclined plane 20 can make the billet rolling stable in the first billet opening 1, and provide a billet with a suitable length for the left flat leg 33 of the second billet opening 3, so as to prevent metal deficiency or A plethora of phenomena.
  • the lower surface of the second upper roller includes a seventh slope 34 , an eighth slope 35 , a ninth slope 36 , a fifth plane 37 , a tenth slope 38 , an eleventh slope 39 and a tenth slope.
  • the second inclined plane 40, the seventh inclined plane 34, the eighth inclined plane 35, the ninth inclined plane 36, the fifth plane 37, the tenth inclined plane 38, the eleventh inclined plane 39 and the twelfth inclined plane 40 are sequentially connected;
  • the fifth plane 37 is arranged horizontally,
  • the lower ends of the seventh inclined plane 34 and the twelfth inclined plane 40 are located on the same horizontal plane, the eighth inclined plane 35 and the eleventh inclined plane 39 are located above the twelfth inclined plane 40, and the ninth inclined plane 36 and the tenth inclined plane 38 are located on the eleventh inclined plane.
  • Above the slope 39 , the ninth slope 36 , the fifth plane 37 and the tenth slope 38 form trapezoidal grooves on the lower surface of the second upper roller.
  • the upper surface of the second lower roller includes a sixth plane 41, an arc segment 42 and a seventh plane 43, the sixth plane 41, the arc segment 42 and the seventh plane 43 are connected in sequence, and the sixth plane 41 and the seventh plane 43 are located at On the same horizontal plane, the arc segment 42 is located above the sixth plane 41, and the radius of the arc segment 42 is 50mm to 120mm (for example: 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm, 105mm, 110mm, 115mm, 120mm), the length of the arc segment 42 is 80mm ⁇ 200mm (80mm, 90mm, 100mm, 110mm, 120mm, 130mm, 140mm, 150mm, 160mm, 170mm, 180mm, 190mm, 200mm).
  • the radius of the arc segment 42 is 50mm to 120mm (for example: 50mm, 55mm, 60mm, 65mm, 70mm, 75mm, 80mm, 85mm, 90mm, 95mm, 100mm,
  • the setting of the arc segment 42 makes the lower part of the billet extrude into a bridge shape with flat sides and a raised middle.
  • the second upper roll and the second lower roll of the blanking machine can firmly clamp the billet, and the state of the billet is It is stable, will not shake or fall over, eliminates the shortcomings of low efficiency, poor safety, and poor dimensional accuracy caused by the instability of the billet, and realizes the efficient production of single-tooth track shoe 5.
  • the seventh bevel 34 and the eighth bevel 35 cooperate with the sixth plane 41 to form the right flat leg 31 of the second opening hole 3, and the ninth bevel 36, the fifth plane 37 and the tenth bevel 38 cooperate with the arc segment 42 to form the first
  • the second central column 32 of the second blank hole 3 cooperates with the eleventh inclined surface 39 and the twelfth inclined surface 40 and the seventh plane 43 cooperate to form the left flat leg 33 of the second blank hole 3, the second blank hole 3 of the second
  • the shape of the second central column 32 is similar to the shape of the first central column 12 of the first billet hole 1, which can make the state of the mountain-shaped intermediate billet stable when rolling in the second billet hole 3; the right side of the second billet hole 3
  • the design of the flat limb 31 and the left flat limb 33 can straighten the corresponding parts of the mountain-shaped intermediate blank and the right curved limb 11 and the left curved limb 13 of the first billet opening 1 while reducing the thickness of the billet, which can further promote the mountain shape.
  • the position corresponding to the main plate 51 and the tooth plate 52 of the single-tooth track shoe 5 between the intermediate blank and the tooth plate is increased.
  • the design of the circular arc section 42 of the second blanking hole 3 can promote the metal to flow from this position to the upper part of the second central column 32 of the second blanking hole 3, promote its heightening, and provide a size close to that of the following rolling. , Easy-to-bite shape.
  • the sixth plane 41 and the seventh plane 43 of the second billet opening 3 cooperate with the arc section 42 to make the lower part of the billet extrude a bridge shape with flat sides and a raised middle.
  • the state of the billet is stable during the rolling process and will not Shaking or overturning eliminates the disadvantages of low efficiency, poor safety, and poor dimensional accuracy caused by the instability of the billet, and realizes the efficient production of the single-tooth track shoe 5.
  • the angle n between the seventh inclined plane 34 and the plane is 60°-88° (for example: 60°, 62°, 64°, 66°, 68°, 70°, 72° , 74°, 76°, 78°, 80°, 82°, 84°, 86°, 88°);
  • the angle ⁇ between the eighth slope 35 and the plane is 0°-30° (for example: 0°, 5°, 10°, 15°, 20°, 25°, 30°);
  • the angle ⁇ between the ninth inclined plane 36 and the fifth plane 37 is 70°-88° (such as: 70°, 72°, 74° °, 76 °, 78 °, 80 °, 82 °, 84 °, 86, 88 °);
  • the angle ⁇ between the tenth inclined plane 38 and the fifth plane 37 is 70 °-88 ° (such as: 70 °, 72°, 74°, 76°, 78°, 80°, 82°,
  • the circular arcs of 50mm-80mm are smooth transition.
  • the setting of the above parameters can make the joints of various parts of the billet deform uniformly, and can accurately control the state of the billet, so as to realize the stable rolling of the second billet hole 3 .
  • the setting of the above parameters can straighten the right curved limb 11 and the left curved limb 13 of the mountain-shaped intermediate blank while reducing the thickness of the blank, and can further promote the growth of the main plate 11 and tooth plate 52 of the single-tooth track shoe 5 .
  • the width of the continuous casting blank is not less than the width W1 of the fourth plane 22 of the upper surface of the first lower roll, the width of the continuous casting blank is not greater than the width W2 of the first opening hole 1, and the height of the continuous casting blank is the same as
  • the width ratio is 0.7-1.3 (for example: 0.7, 0.8, 0.9, 1.0, 1.1, 1.2, 1.3).
  • the design of the above-mentioned width and height of the continuous casting billet can realize the goal that the main plate 51, the tooth plate 52 and the flank 53 of the single-tooth track shoe 5 are well formed, reduce the dependence on the size of the billet, and use a smaller billet to produce a larger specification
  • the single-tooth track shoe 5 has a good effect of energy saving and consumption reduction, and saves costs.
  • the present invention also discloses a hot rolling method for the single-toothed track shoe 5, using the above-mentioned single-toothed track shoe 5 to open the billet pass, including the following steps:
  • Step 1) Use a blanking machine to open a rectangular continuous casting billet.
  • the continuous casting billet is sequentially rolled from 1 to 4 first billet opening holes 1, and the continuous casting billet is gradually rolled out of the right curved limb 11, the first A central column 12 and left curved limb 13, the first slope 14 and the first plane 15 cooperate with the fifth slope 21 and the fourth plane 22 to form the right curved limb 11, the second slope 16, the second plane 17 and the third slope 18 Cooperate with the fourth plane 22 to form the first central column 12, the third plane 19 and the fourth slope 20 form the left curved limb 13 with the fourth plane 22 and the sixth slope 23, and the cross section of the continuous casting billet changes from a rectangle to a mountain shape , to get the mountain-shaped intermediate billet;
  • step 2) the mountain-shaped intermediate billet obtained in step 1) is further opened by using a blanking machine.
  • the mountain-shaped intermediate billet is rolled by 1-4 second blanking holes 3, and the seventh inclined plane 34 and the eighth inclined plane 35 are rolled.
  • Cooperate with the sixth plane 41 so that the right curved limb 11 of the mountain-shaped intermediate billet is gradually straightened and thinned to form the right flat limb 31;
  • the ninth inclined plane 36, the fifth plane 37 and the tenth inclined plane 38 cooperate with the arc segment 42 , so that the first center column 12 is gradually thinned and grows taller to form the second center column 32, and the fourth plane 22 is pressed out of the arc segment 42;
  • the eleventh bevel 39 and the twelfth bevel 40 and the seventh plane 43 cooperation the left curved limb 13 is gradually straightened and thinned to form the left flat limb 33, and the cross section of the mountain-shaped intermediate blank changes from the mountain-shaped to the inverted T-shaped, and the inverted T-shaped intermediate blank
  • Step 3 Rough rolling the inverted T-shaped intermediate billet obtained after billeting through the first billet hole 1 and the second billet hole 3 to reduce the thickness of the billet and increase the width of the billet;
  • Step 4) Finish rolling the billet after rough rolling in step 3), and accurately forming the parts of the billet corresponding to the main plate 51, tooth plate 52 and flank 53 of the single-tooth track shoe 5 to obtain a single-tooth track shoe 5.
  • the right flat leg 31 is rolled into the main plate 51 of the single-tooth track shoe 5
  • the second center column 32 is rolled into the side wing 53 of the single-tooth track shoe 5
  • the left flat leg 33 is rolled into the side of the single-tooth track shoe 5. Tooth plate 52.
  • the rectangular continuous casting blank passes through the first blanking hole 1 and the second blanking hole 3 of the blanking machine for blanking. After the blanking, the blank is subjected to rough rolling and finishing rolling to obtain a single-tooth track shoe 5.
  • the blank is connected with the first blanking hole
  • the position of the second central column 32 of the second blank hole 3 is made into the design of the side wing 53, which solves the disadvantages that the side wing 53 is easily overfilled and difficult to adjust in the prior art; the blank and the left flat leg 33 of the second blank hole 3
  • the design of the toothed plate 52 at the corresponding position overcomes the defects of insufficient metal and poor molding of the toothed plate 52 in the prior art.
  • a single-tooth track shoe blanking pass and hot rolling method the rectangular continuous casting billet passes through the first blanking hole 1 and the second blanking hole 3 of the blanking machine for blanking, and the billet after blanking is then passed through the rough
  • the single-tooth track shoe 5 is obtained by rolling and finishing rolling.
  • the present invention significantly reduces the dependence on the size of the billet, and can use a smaller billet to produce a larger-sized single-tooth track shoe 5, which has a better effect of energy saving and consumption reduction; the first development
  • the unique design of the blank hole 1 and the second blank opening hole 3 eliminates the disadvantages of low efficiency, poor safety, and poor dimensional accuracy caused by the instability of the blank, and realizes the high-efficiency production of the single-tooth track shoe 5 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Metal Rolling (AREA)

Abstract

本发明提供一种单齿履带板开坯孔型及热轧方法，包括第一开坯孔和第二开坯孔，所述第一开坯孔由开坯机的第一上辊和第一下辊形成，所述第二开坯孔由开坯机的第二上辊和第二下辊形成，所述第一开坯孔为前孔，所述第一开坯孔用于将矩形的连铸坯料挤压成包括右弯肢、第一中柱和左弯肢的山型中间坯；所述第二开坯孔为后孔，所述第二开坯孔用于将所述山型中间坯挤压成包括右平肢、第二中柱和左平肢的倒T型中间坯。本发明显著降低了坯料尺寸的依赖，可以采用较小的坯料生产较大规格的单齿履带板，具有较好的节能降耗效果；第一开坯孔和第二开坯孔的独特设计消除了坯料不稳定带来的效率低、安全性差、尺寸精度差等不足，实现了单齿履带板的高效生产。

Description

一种单齿履带板开坯孔型及热轧方法 技术领域
本发明涉及型钢生产技术领域，特别涉及一种单齿履带板开坯孔型及热轧方法。
背景技术
履带是工程机械常用的行走部件，与轮胎相比，履带能够应用于各种恶劣的工作环境，且具有耐磨、耐冲击等优点。履带板是生产履带必须的冶金产品，成型方法多种多样，如铸造成型、冲压成型、机械加工成型和轧制成型等。轧制成型方法与铸造和冲压、机加工方法相比，效率高、成本低、综合性能优，因而得到越来越广泛的应用。但另一方面，由于履带板横截面形状复杂不对称，轧件在开坯轧制过程中变形控制难度较大，易弯曲、扭转、倒钢和堆钢，难以实现自动化生产。因此，履带板尤其是不对称程度高的单齿履带板成型不得不采用人工辅助轧件咬入的方式生产，大大增加了人身伤害事故风险。
中国专利CN201310393973.1公开了一种单齿履带板半开半闭式制坯模及单齿履带板锻造方法。其目的是为了提供一种能用于单齿履带板预锻制坯的、得到的锻件较易进行终锻的单齿履带板半开半闭式制坯模和提供一种使用锻造工艺的、能够用于单齿履带板的锻造的单齿履带板锻造方法。该锻造方法生产履带板，产量低，成本高。
《钢铁钒钛》2009年7月30卷第3期发表论文《履带钢轧制过程有限元仿真》中涉及一种履带钢轧制工艺指出，单齿履带钢断面形状复杂，轧制过程中容易出现扭转、翘曲、侧弯等现象，影响轧制的顺行。针对履带钢切深孔轧制扭转严重的问题，优化孔型参数，使履带钢切深孔轧制过程扭转角从135.6°减小到13.85°，满足后续道次正常咬入的要求，保证了生产的顺利进行。该文献涉及的轧制工艺除文中提到的6孔存在的扭转严重问题外，还另设有1孔、2孔、3孔共3个箱型孔用来缩料，增加了轧辊长度和道次， 生产效率低，能耗高。另外，4孔、5孔、8孔均存在轧件底部支撑状态不稳定，翻钢后易倾斜或翻倒，影响后续轧制的突出问题，不仅尺寸精度难以控制，且需依赖人工辅助轧件咬入，不利于生产节奏的提高和安全风险控制。
发明内容
本发明的目的在于提供一种单齿履带板开坯孔型及热轧方法，在获得良好的中间坯形状的同时，使坯料底部支撑稳定，翻钢后不会倾斜或翻倒，无需人工辅助即可实现单齿履带板高效热轧生产。
为了实现上述目的，本发明提供如下技术方案：
一种单齿履带板开坯孔型，包括第一开坯孔和第二开坯孔，所述第一开坯孔由开坯机的第一上辊和第一下辊形成，所述第二开坯孔由开坯机的第二上辊和第二下辊形成，其中，所述第一开坯孔为前孔，所述第一开坯孔用于将矩形的连铸坯料挤压成包括右弯肢、第一中柱和左弯肢的山型中间坯；所述第二开坯孔为后孔，所述第二开坯孔用于将所述山型中间坯挤压成包括右平肢、第二中柱和左平肢的倒T型中间坯。
进一步地，在上述的单齿履带板开坯孔型中，所述第一上辊的下表面包括第一斜面、第一平面、第二斜面、第二平面、第三斜面、第三平面和第四斜面，所述第一斜面、所述第一平面、所述第二斜面、所述第二平面、所述第三斜面、所述第三平面和所述第四斜面依次连接，所述第一平面和所述第三平面位于同一水平面，所述第一斜面、所述第二斜面、所述第三斜面和所述第四斜面均位于所述第一平面的上方，所述第二平面与所述第一平面平行，所述第二斜面、所述第二平面和所述第三斜面在所述第一上辊的下表面形成梯形凹槽。
进一步地，在上述的单齿履带板开坯孔型中，所述第一斜面与所述第一平面之间的夹角α为30°-70°；所述第二斜面与所述第一平面之间的夹角β为65°-88°；所述第三斜面与所述第三平面之间的夹角γ为65°-88°；所述第四斜面与所述第三平面之间的夹角δ为30°-70°；优选地，所述第二斜面与所述第二平面之间、所述第二平面与所述第三斜面之间均通过半径为10mm-30mm的圆弧平滑过渡；所述第一斜面与第一平面之间、所述第一平面与所述第二斜面之间、所述第三斜面与所述第三平面之间、所述第三平面 与所述第四斜面之间均通过半径为25mm-60mm的圆弧平滑过渡；优选地，所述第一斜面的长度B1，所述第二平面与所述第一平面之间的垂直距离为H1，B1∶H1＝0.7～2∶1；所述第四斜面长度为B2，B2∶H1＝0.5～1.2∶1。
进一步地，在上述的单齿履带板开坯孔型中，所述第一下辊的上表面包括第五斜面、第四平面和第六斜面，所述第五斜面、所述第四平面和所述第六斜面依次连接，所述第五斜面和所述第六斜面均位于所述第四平面的上方；优选地，所述第五斜面与所述第四平面之间的夹角ε为50°-88°，所述第四平面与所述第六斜面之间的夹角ζ为50°-88°；优选地，所述第五斜面与所述第四平面之间、所述第四平面与所述第六斜面之间均通过半径为25mm-60mm的圆弧平滑过渡。
进一步地，在上述的单齿履带板开坯孔型中，所述第二上辊的下表面包括第七斜面、第八斜面、第九斜面、第五平面、第十斜面、第十一斜面和第十二斜面，所述第七斜面、所述第八斜面、所述第九斜面、所述第五平面、所述第十斜面、所述第十一斜面和所述第十二斜面依次连接；所述第五平面水平设置，所述第七斜面和所述第十二斜面的下端位于同一水平面，所述第八斜面和所述第十一斜面均位于所述第十二斜面的上方，所述第九斜面和所述第十斜面均位于所述第十一斜面的上方，所述第九斜面、所述第五平面和所述第十斜面在所述第二上辊的下表面形成梯形凹槽。
进一步地，在上述的单齿履带板开坯孔型中，所述第七斜面与水平面之间的夹角η为60°-88°；所述第八斜面与水平面之间的夹角θ为0°-30°；所述第九斜面与所述第五平面之间的夹角ι为70°-88°；所述第十斜面与所述第五平面之间的夹角κ为70°-88°；所述第十一斜面与水平面之间的夹角λ为0°-30°；所述第十二斜面与水平面之间的夹角μ为60°-88°；优选地，第七斜面与第八斜面之间、第九斜面与第五平面之间、第五平面与第十斜面之间、第十一斜面与第十二斜面之间均通过半径为10mm-30mm的圆弧平滑过渡；所述第八斜面与所述第九斜面之间、所述第十斜面与所述第十一斜面之间均通过半径为50mm-80mm的圆弧平滑过渡。
进一步地，在上述的单齿履带板开坯孔型中，所述第二下辊的上表面包括第六平面、圆弧段和第七平面，所述第六平面、所述圆弧段和所述第七平面依次连接，所述第六平面和第七平面位于同一水平面，所述圆弧段位于所 述第六平面的上方，所述圆弧段的半径为50mm～120mm，所述圆弧段的长度为80mm～200mm。
进一步地，在上述的单齿履带板开坯孔型中，所述右平肢的长度为B3，所述第五平面与所述第六平面之间的垂直距离为H2，B3∶H2＝1～2∶1；所述左平肢的长度为B4，B4∶H2＝0.6-1.2∶1。
进一步地，在上述的单齿履带板开坯孔型中，所述连铸坯料的宽度不小于所述第一下辊的上表面的所述第四平面的宽度W1，所述连铸坯料的宽度不大于所述第一开坯孔的宽度W2，且所述连铸坯料的高度与宽度比为0.7-1.3。
另一方面，提供了一种单齿履带板的热轧方法，利用上述的单齿履带板开坯孔型，包括如下步骤：
步骤1)采用开坯机对矩形的连铸坯料进行开坯，连铸坯料由1-4个第一开坯孔依次进行轧制，连铸坯料逐渐被轧制出右弯肢、第一中柱和左弯肢，第一斜面和第一平面与第五斜面和第四平面配合形成右弯肢，第二斜面、第二平面和第三斜面与第四平面配合形成第一中柱，第三平面和第四斜面与第四平面和第六斜面形成左弯肢，连铸坯料的横断面从矩形变为山型，得到山型中间坯；
步骤2)，采用开坯机对步骤1)得到的山型中间坯进一步开坯，山型中间坯由1-4个第二开坯孔进行轧制，第七斜面和第八斜面与第六平面配合，使山型中间坯的右弯肢被逐渐压直、变薄形成右平肢；第九斜面、第五平面和第十斜面与圆弧段配合，使第一中柱被逐渐压薄、长高形成第二中柱，并使第四平面被压出圆弧段；第十一斜面和第十二斜面和第七平面配合，使左弯肢被逐渐压直、变薄形成左平肢，山型中间坯的横断面从山型变成倒T型，得到倒T型中间坯；
步骤3)对经第一开坯孔和第二开坯孔开坯后得到的倒T型中间坯进行粗轧，减小坯料厚度，增加坯料宽度；
步骤4)对步骤3)粗轧后的坯料进行精轧，对坯料与单齿履带板的主板、侧翼和齿板相对应的各部位进行精确成型后制得单齿履带板，其中，右平肢轧制成单齿履带板的主板，第二中柱轧制成单齿履带板的侧翼，左平肢轧制成单齿履带板的齿板。
分析可知，本发明公开一种单齿履带板开坯孔型及热轧方法，矩形的连铸坯料经过开坯机的第一开坯孔和第二开坯孔进行开坯，开坯后的坯料经过再经过粗轧和精轧得到单齿履带板，本发明显著降低了坯料尺寸的依赖，可以采用较小的坯料生产较大规格的单齿履带板，具有较好的节能降耗效果；第一开坯孔和第二开坯孔的独特设计消除了坯料不稳定带来的效率低、安全性差、尺寸精度差等不足，实现了单齿履带板的高效生产。
附图说明
构成本申请的一部分的说明书附图用来提供对本发明的进一步理解，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。其中：
图1为本发明一实施例的第一开坯孔的结构示意图。
图2为本发明一实施例的第二开坯孔的结构示意图。
图3为本发明一实施例的单齿履带板的结构示意图。
图4为本发明一实施例的第一开坯孔的另一结构示意图。
图5为本发明一实施例的第二开坯孔的另一结构示意图。
附图标记说明：1第一开坯孔；11右弯肢；12第一中柱；13左弯肢；14第一斜面；15第一平面；16第二斜面；17第二平面；18第三斜面；19第三平面；20第四斜面；21第五斜面；22第四平面；23第六斜面；3第二开坯孔；31右平肢；32第二中柱；33左平肢；34第七斜面；35第八斜面；36第九斜面；37第五平面；38第十斜面；39第十一斜面；40第十二斜面；41第六平面；42圆弧段；43第七平面；5单齿履带板；51主板；52齿板；53侧翼。
具体实施方式
下面将参考附图并结合实施例来详细说明本发明。各个示例通过本发明的解释的方式提供而非限制本发明。实际上，本领域的技术人员将清楚，在不脱离本发明的范围或精神的情况下，可在本发明中进行修改和变型。例如，示为或描述为一个实施例的一部分的特征可用于另一个实施例，以产生又一个实施例。因此，所期望的是，本发明包含归入所附权利要求及其等同物的 范围内的此类修改和变型。
在本发明的描述中，术语“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本发明而不是要求本发明必须以特定的方位构造和操作，因此不能理解为对本发明的限制。本发明中使用的术语“相连”、“连接”、“设置”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接；可以是直接相连，也可以通过中间部件间接相连，对于本领域的普通技术人员而言，可以根据具体情况理解上述术语的具体含义。
所附附图中示出了本发明的一个或多个示例。详细描述使用了数字和字母标记来指代附图中的特征。附图和描述中的相似或类似标记的已经用于指代本发明的相似或类似的部分。如本文所用的那样，用语“第一”、“第二”和“第三”等可互换地使用，以将一个构件与另一个区分开，且不旨在表示单独构件的位置或重要性。
如图1至图5所示，根据本发明的实施例，提供了一种单齿履带板开坯孔型，如图3所示，单齿履带板5包括主板51、齿板52和侧翼53，侧翼53的一端与主板51的一端连接，侧翼53的另一端向远离主板51的方向延伸，齿板52的一端与主板51的下表面连接。
该开坯孔型包括第一开坯孔1和第二开坯孔3，第一开坯孔1由开坯机的第一上辊和第一下辊形成，第二开坯孔3由开坯机的第二上辊和第二下辊形成，其中，第一开坯孔1为前孔，第一开坯孔1用于将矩形的连铸坯料挤压成包括右弯肢11、第一中柱12和左弯肢13的山型中间坯；第二开坯孔3为后孔，第二开坯孔3用于将山型中间坯挤压成包括右平肢31、第二中柱32和左平肢33的倒T型中间坯。在利用开坯机的第一开坯孔1和第二开坯孔3对单齿履带板5进行轧制的过程中，能够消除了坯料不稳定带来的效率低、安全性差、尺寸精度差等不足，实现了单齿履带板5的高效生产。
进一步地，如图1所示，第一上辊的下表面包括第一斜面14、第一平面15、第二斜面16、第二平面17、第三斜面18、第三平面19和第四斜面20，第一斜面14、第一平面15、第二斜面16、第二平面17、第三斜面18、第三平面19和第四斜面20依次连接，第一平面15和第三平面19位于同一水平 面，第一斜面14、第二斜面16、第三斜面18和第四斜面20均位于第一平面15的上方，第二平面17与第一平面15平行，第二斜面16、第二平面17和第三斜面18在第一上辊的下表面形成梯形凹槽。第一下辊的上表面包括第五斜面21、第四平面22和第六斜面23，第五斜面21、第四平面22和第六斜面23依次连接，第五斜面21和第六斜面23均位于第四平面22的上方。
第一斜面14和第一平面15与第五斜面21和第四平面22配合形成第一开坯孔1的右弯肢11，第二斜面16、第二平面17和第三斜面18与第四平面22配合形成第一开坯孔1的第一中柱12，第三平面19和第四斜面20与第四平面22和第六斜面23形成第一开坯孔1的左弯肢13，右弯肢11和左弯肢13均为弯曲结构，右弯肢11和左弯肢13的弯曲设计可使坯料与单齿履带板5的主板51、齿板52和侧翼53相对应的各部位的宽度和高度最大限度增大，实现采用较小的坯料轧制出单齿履带板5，轧制孔型和道次少，生产过程效率高，能耗低，符合国家的绿色低碳产业政策。第五斜面21、第四平面22和第六斜面23组合使第一开坯孔1的底部形成槽型结构，使开坯机的第一上辊和第一下辊能够稳稳夹住坯料，保证坯料底部支撑状态稳定，实现稳定轧制，进而能够实现对坯料的尺寸精度的控制，有效减轻了坯料在轧制过程中的扭转和弯曲的程度，并防止由于坯料倾斜或翻倒而影响后续轧制，无需依赖人工辅助轧件咬入，生产节奏有效提高，降低了安全风险。
进一步地，如图4所示，第一斜面14与第一平面15之间的夹角α为30°-70°(比如：30°、35°、40°、45°、50°、55°、60°、65°、70°)，第一斜面14倾斜角度的设计可以使坯料在第一开坯孔1轧制稳定的同时，为第二开坯孔3的右平肢31提供长度合适的坯料，防止出现金属不足或过多的现象；第二斜面16与第一平面15之间的夹角β为65°-88°(比如：65°、67°、70°、72°、74°、76°、78°、80°、82°、84°、86°、88°)；第三斜面18与第三平面19之间的夹角γ为65°-88°(比如：65°、67°、70°、72°、74°、76°、78°、80°、82°、84°、86°、88°)；第四斜面20与第三平面19之间的夹角δ为30°-70°(比如：30°、35°、40°、45°、50°、55°、60°、65°、70°)，第四斜面20倾斜角度设计可以使第一开坯孔1对坯料稳定轧制的同时，为第二开坯孔3的左平肢33提供长度合适的坯料，防止出现金属不足或过多的现象。第五斜面21与第四平面22之间的夹角ε为50°-88°(比如：50°、55°、60°、65°、70°、 75°、80°、85°、88°)，第四平面22与第六斜面23之间的夹角ζ为50°-88°(比如：50°、55°、60°、65°、70°、75°、80°、85°、88°)；在本发明的一实施例中，α为45°、β为75°、γ为75°、δ为45°、ε为62°、ζ为62°。
第二斜面16与第二平面17之间、第二平面17与第三斜面18之间均采用适当的圆弧过渡。优选地，第二斜面16与第二平面17之间、第二平面17与第三斜面18之间均通过半径为10mm-30mm(比如：10mm、12mm、14mm、16mm、18mm、20mm、22mm、24mm、26mm、28mm、30mm)的圆弧平滑过渡。第一斜面14与第一平面15之间、第一平面15与第二斜面16之间、第三斜面18与第三平面19之间、第三平面19与第四斜面20之间、第五斜面21与第四平面22之间、第四平面22与第六斜面23之间均通过25mm-60mm(比如：25mm、30mm、35mm、40mm、45mm、50mm、55mm、60mm)的圆弧平滑过渡。上述参数的设置能够使坯料各部位连接处均匀变形、减小切分阻力，同时还能够使第一中柱12尽可能增长到理想高度，满足对单齿履带板5成品的侧翼53的尺寸控制需要。
优选地，如图4所示，第一斜面14的长度为B1，第二平面17与第一平面15之间的垂直距离为H1，B1∶H1＝0.7～2：1；第四斜面20长度为B2，B2∶H1＝0.5～1.2:1。第一斜面14倾斜角度与长度的设计可以使坯料在第一开坯孔1轧制稳定的同时，为第二开坯孔3的右平肢31提供长度合适的坯料，防止出现金属不足或过多的现象。第四斜面20的倾斜角度与长度的设计可以使坯料在第一开坯孔1轧制稳定的同时，为第二开坯孔3的左平肢33提供长度合适的坯料，防止出现金属不足或过多的现象。
进一步地，如图2所示，第二上辊的下表面包括第七斜面34、第八斜面35、第九斜面36、第五平面37、第十斜面38、第十一斜面39和第十二斜面40，第七斜面34、第八斜面35、第九斜面36、第五平面37、第十斜面38、第十一斜面39和第十二斜面40依次连接；第五平面37水平设置，第七斜面34和第十二斜面40的下端位于同一水平面，第八斜面35和第十一斜面39均位于第十二斜面40的上方，第九斜面36和第十斜面38均位于第十一斜面39的上方，第九斜面36、第五平面37和第十斜面38在第二上辊的下表面形成梯形凹槽。第二下辊的上表面包括第六平面41、圆弧段42和第七平面43，第六平面41、圆弧段42和第七平面43依次连接，第六平面41和第七平面 43位于同一水平面，圆弧段42位于第六平面41的上方，圆弧段42的半径为50mm～120mm(比如：50mm、55mm、60mm、65mm、70mm、75mm、80mm、85mm、90mm、95mm、100mm、105mm、110mm、115mm、120mm)，圆弧段42的长度为80mm～200mm(80mm、90mm、100mm、110mm、120mm、130mm、140mm、150mm、160mm、170mm、180mm、190mm、200mm)。圆弧段42的设置使坯料下部挤压出两侧平整、中间凸起的桥形，轧制过程中，开坯机的第二上辊和第二下辊能够稳稳夹住坯料，坯料状态稳定，不会晃动或翻倒，消除坯料不稳定带来的效率低、安全性差、尺寸精度差等不足，实现了单齿履带板5的高效生产。
第七斜面34和第八斜面35与第六平面41配合形成第二开坯孔3的右平肢31，第九斜面36、第五平面37和第十斜面38与圆弧段42配合形成第二开坯孔3的第二中柱32，第十一斜面39和第十二斜面40和第七平面43配合形成第二开坯孔3的左平肢33，第二开坯孔3的第二中柱32的形状与第一开坯孔1的第一中柱12形状近似，可使山型中间坯在第二开坯孔3中轧制时状态稳定；第二开坯孔3的右平肢31和左平肢33的设计可在减薄坯料厚度的同时将山型中间坯与第一开坯孔1的右弯肢11和左弯肢13对应的部位矫直，能够进一步促进山型中间坯与单齿履带板5的主板51和齿板52对应的部位增长。第二开坯孔3的圆弧段42的设计可促使金属从该部位向与第二开坯孔3的第二中柱32的上部流动，促进其增高，同时为后面的轧制提供尺寸接近、易于咬入的形状。第二开坯孔3的第六平面41、第七平面43和圆弧段42配合，使坯料下部挤压出两侧平整、中间凸起的桥形，轧制过程中坯料状态稳定，不会晃动或翻倒，消除坯料不稳定带来的效率低、安全性差、尺寸精度差等不足，实现了单齿履带板5的高效生产。
进一步地，如图5所示，第七斜面34与平面之间的夹角η为60°-88°(比如：60°、62°、64°、66°、68°、70°、72°、74°、76°、78°、80°、82°、84°、86°、88°)；第八斜面35与平面之间的夹角θ为0°-30°(比如：0°、5°、10°、15°、20°、25°、30°)；第九斜面36与第五平面37之间的夹角ι为70°-88°(比如：70°、72°、74°、76°、78°、80°、82°、84°、86、88°)；第十斜面38与第五平面37之间的夹角κ为70°-88°(比如：70°、72°、74°、76°、78°、80°、82°、84°、86、88°)；第十一斜面39与平面之间的夹角λ为0°-30°(比 如：0°、5°、10°、15°、20°、25°、30°)；第十二斜面40与平面之间的夹角μ为60°-88°(比如：60°、62°、64°、66°、68°、70°、72°、74°、76°、78°、80°、82°、84°、86、88°)；在本发明一实施例中，η为80°、θ为5°、ι为80°、κ为80°、λ为10°、μ为80°。
第七斜面34与第八斜面35之间、第九斜面36与第五平面37之间、第五平面37与第十斜面38之间、第十一斜面39与第十二斜面40之间均采用适当的圆弧过渡，优选地，第七斜面34与第八斜面35之间、第九斜面36与第五平面37之间、第五平面37与第十斜面38之间、第十一斜面39与第十二斜面40之间均通过半径为10mm-30mm(比如：10mm、12mm、14mm、16mm、18mm、20mm、22mm、24mm、26mm、28mm、30mm)的圆弧平滑过渡。第八斜面35与第九斜面36之间、第十斜面38与第十一斜面39之间均通过50mm-80mm(比如：50mm、55mm、60mm、65mm、70mm、75mm、80mm)的圆弧平滑过渡。上述参数的设置能够使坯料各部位连接处均匀变形，并能够准确的控制坯料的状态，实现第二开坯孔3的稳定轧制。
进一步地，右平肢31的长度为B3，第五平面37与第六平面41之间的垂直距离为H2，B3∶H2＝1～2∶1；左平肢33的长度为B4，B4∶H2＝0.6～1.2∶1。上述参数的设置可在减薄坯料厚度的同时将山型中间坯的右弯肢11和左弯肢13矫直，并能够进一步促进单齿履带板5的主板11和齿板52的增长。
进一步地，连铸坯料的宽度不小于第一下辊的上表面的第四平面22的宽度W1，连铸坯料的宽度不大于第一开坯孔1的宽度W2，且连铸坯料的高度与宽度比为0.7-1.3(比如：0.7、0.8、0.9、1.0、1.1、1.2、1.3)。连铸坯料的上述宽度和高度的设计，能够实现单齿履带板5的主板51、齿板52和侧翼53成型良好的目标，降低了坯料尺寸的依赖，可以采用较小的坯料生产较大规格的单齿履带板5，具有较好的节能降耗效果，节约了成本。
本发明还公开了一种单齿履带板5的热轧方法，利用上述的单齿履带板5开坯孔型，包括如下步骤：
步骤1)采用开坯机对矩形的连铸坯料进行开坯，连铸坯料由1-4个第一开坯孔1依次进行轧制，连铸坯料逐渐被轧制出右弯肢11、第一中柱12和左弯肢13，第一斜面14和第一平面15与第五斜面21和第四平面22配合形成右弯肢11，第二斜面16、第二平面17和第三斜面18与第四平面22配 合形成第一中柱12，第三平面19和第四斜面20与第四平面22和第六斜面23形成左弯肢13，连铸坯料的横断面从矩形变为山型，得到山型中间坯；
步骤2)，采用开坯机对步骤1)得到的山型中间坯进一步开坯，山型中间坯由1-4个第二开坯孔3进行轧制，第七斜面34和第八斜面35与第六平面41配合，使山型中间坯的右弯肢11被逐渐压直、变薄形成右平肢31；第九斜面36、第五平面37和第十斜面38与圆弧段42配合，使第一中柱12被逐渐压薄、长高形成第二中柱32，并使第四平面22被压出圆弧段42；第十一斜面39和第十二斜面40和第七平面43配合，使左弯肢13被逐渐压直、变薄形成左平肢33，山型中间坯的横断面从山型变成倒T型，得到倒T型中间坯；
步骤3)对经第一开坯孔1和第二开坯孔3开坯后得到的倒T型中间坯进行粗轧，减小坯料厚度，增加坯料宽度；
步骤4)对步骤3)粗轧后的坯料进行精轧，对坯料与单齿履带板5的主板51、齿板52和侧翼53相对应的的各部位进行精确成型后制得单齿履带板5，其中，右平肢31轧制成单齿履带板5的主板51，第二中柱32轧制成单齿履带板5的侧翼53，左平肢33轧制成单齿履带板5的齿板52。
矩形的连铸坯料经过开坯机的第一开坯孔1和第二开坯孔3进行开坯，开坯后的坯料经过再经过粗轧和精轧得到单齿履带板5，坯料与第二开坯孔3的第二中柱32的部位制成侧翼53的设计，解决了现有技术中侧翼53容易过充满且调整困难的不足；坯料与第二开坯孔3的左平肢33对应的部位制成齿板52的设计，克服了现有技术中齿板52金属不足，成型不良的缺陷。
从以上的描述中，可以看出，本发明上述的实施例实现了如下技术效果：
一种单齿履带板开坯孔型及热轧方法，矩形的连铸坯料经过开坯机的第一开坯孔1和第二开坯孔3进行开坯，开坯后的坯料再经过粗轧和精轧得到单齿履带板5，本发明显著降低了坯料尺寸的依赖，可以采用较小的坯料生产较大规格的单齿履带板5，具有较好的节能降耗效果；第一开坯孔1和第二开坯孔3的独特设计消除了坯料不稳定带来的效率低、安全性差、尺寸精度差等不足，实现了单齿履带板5的高效生产。
以上所述仅为本发明的优选实施例，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则 之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种单齿履带板开坯孔型，其特征在于，包括第一开坯孔和第二开坯孔，所述第一开坯孔由开坯机的第一上辊和第一下辊形成，所述第二开坯孔由开坯机的第二上辊和第二下辊形成，其中，
    所述第一开坯孔为前孔，所述第一开坯孔用于将矩形的连铸坯料挤压成包括右弯肢、第一中柱和左弯肢的山型中间坯；
    所述第二开坯孔为后孔，所述第二开坯孔用于将所述山型中间坯挤压成包括右平肢、第二中柱和左平肢的倒T型中间坯。
  2. 根据权利要求1所述的单齿履带板开坯孔型，其特征在于，
    所述第一上辊的下表面包括第一斜面、第一平面、第二斜面、第二平面、第三斜面、第三平面和第四斜面，所述第一斜面、所述第一平面、所述第二斜面、所述第二平面、所述第三斜面、所述第三平面和所述第四斜面依次连接，所述第一平面和所述第三平面位于同一水平面，所述第一斜面、所述第二斜面、所述第三斜面和所述第四斜面均位于所述第一平面的上方，所述第二平面与所述第一平面平行，所述第二斜面、所述第二平面和所述第三斜面在所述第一上辊的下表面形成梯形凹槽。
  3. 根据权利要求2所述的单齿履带板开坯孔型，其特征在于，
    所述第一斜面与所述第一平面之间的夹角α为30°-70°；
    所述第二斜面与所述第一平面之间的夹角β为65°-88°；
    所述第三斜面与所述第三平面之间的夹角γ为65°-88°；
    所述第四斜面与所述第三平面之间的夹角δ为30°-70°；
    优选地，所述第二斜面与所述第二平面之间、所述第二平面与所述第三斜面之间均通过半径为10mm-30mm的圆弧平滑过渡；
    所述第一斜面与第一平面之间、所述第一平面与所述第二斜面之间、所述第三斜面与所述第三平面之间、所述第三平面与所述第四斜面之间均通过半径为25mm-60mm的圆弧平滑过渡；
    优选地，所述第一斜面的长度B1，所述第二平面与所述第一平面之间的 垂直距离为H1，B1∶H1＝0.7～2∶1；
    所述第四斜面长度为B2，B2∶H1＝0.5～1.2∶1。
  4. 根据权利要求1所述的单齿履带板开坯孔型，其特征在于，
    所述第一下辊的上表面包括第五斜面、第四平面和第六斜面，所述第五斜面、所述第四平面和所述第六斜面依次连接，所述第五斜面和所述第六斜面均位于所述第四平面的上方；
    优选地，所述第五斜面与所述第四平面之间的夹角ε为50°-88°，所述第四平面与所述第六斜面之间的夹角ζ为50°-88°；
    优选地，所述第五斜面与所述第四平面之间、所述第四平面与所述第六斜面之间均通过半径为25mm-60mm的圆弧平滑过渡。
  5. 根据权利要求1所述的单齿履带板开坯孔型，其特征在于，
    所述第二上辊的下表面包括第七斜面、第八斜面、第九斜面、第五平面、第十斜面、第十一斜面和第十二斜面，所述第七斜面、所述第八斜面、所述第九斜面、所述第五平面、所述第十斜面、所述第十一斜面和所述第十二斜面依次连接；
    所述第五平面水平设置，所述第七斜面和所述第十二斜面的下端位于同一水平面，所述第八斜面和所述第十一斜面均位于所述第十二斜面的上方，所述第九斜面和所述第十斜面均位于所述第十一斜面的上方，所述第九斜面、所述第五平面和所述第十斜面在所述第二上辊的下表面形成梯形凹槽。
  6. 根据权利要求5所述的单齿履带板开坯孔型，其特征在于，
    所述第七斜面与水平面之间的夹角η为60°-88°；
    所述第八斜面与水平面之间的夹角θ为0°-30°；
    所述第九斜面与所述第五平面之间的夹角ι为70°-88°；
    所述第十斜面与所述第五平面之间的夹角κ为70°-88°；
    所述第十一斜面与水平面之间的夹角λ为0°-30°；
    所述第十二斜面与水平面之间的夹角μ为60°-88°；
    优选地，第七斜面与第八斜面之间、第九斜面与第五平面之间、第五平 面与第十斜面之间、第十一斜面与第十二斜面之间均通过半径为10mm-30mm的圆弧平滑过渡；
    所述第八斜面与所述第九斜面之间、所述第十斜面与所述第十一斜面之间均通过半径为50mm-80mm的圆弧平滑过渡。
  7. 根据权利要求5所述的单齿履带板开坯孔型，其特征在于，
    所述第二下辊的上表面包括第六平面、圆弧段和第七平面，所述第六平面、所述圆弧段和所述第七平面依次连接，所述第六平面和第七平面位于同一水平面，所述圆弧段位于所述第六平面的上方，所述圆弧段的半径为50mm～120mm，所述圆弧段的长度为80mm～200mm。
  8. 根据权利要求7所述的单齿履带板开坯孔型，其特征在于，
    所述右平肢的长度为B3，所述第五平面与所述第六平面之间的垂直距离为H2，B3∶H2＝1～2∶1；
    所述左平肢的长度为B4，B4∶H2＝0.6-1.2∶1。
  9. 根据权利要求4所述的单齿履带板开坯孔型，其特征在于，
    所述连铸坯料的宽度不小于所述第一下辊的上表面的所述第四平面的宽度W1，所述连铸坯料的宽度不大于所述第一开坯孔的宽度W2，且所述连铸坯料的高度与宽度比为0.7-1.3。
  10. 一种单齿履带板的热轧方法，利用权利要求1～9任一项所述的单齿履带板开坯孔型，其特征在于，包括如下步骤：
    步骤1)采用开坯机对矩形的连铸坯料进行开坯，连铸坯料由1-4个第一开坯孔依次进行轧制，连铸坯料逐渐被轧制出右弯肢、第一中柱和左弯肢，第一斜面和第一平面与第五斜面和第四平面配合形成右弯肢，第二斜面、第二平面和第三斜面与第四平面配合形成第一中柱，第三平面和第四斜面与第四平面和第六斜面形成左弯肢，连铸坯料的横断面从矩形变为山型，得到山型中间坯；
    步骤2)，采用开坯机对步骤1)得到的山型中间坯进一步开坯，山型中 间坯由1-4个第二开坯孔进行轧制，第七斜面和第八斜面与第六平面配合，使山型中间坯的右弯肢被逐渐压直、变薄形成右平肢；第九斜面、第五平面和第十斜面与圆弧段配合，使第一中柱被逐渐压薄、长高形成第二中柱，并使第四平面被压出圆弧段；第十一斜面和第十二斜面和第七平面配合，使左弯肢被逐渐压直、变薄形成左平肢，山型中间坯的横断面从山型变成倒T型，得到倒T型中间坯；
    步骤3)对经第一开坯孔和第二开坯孔开坯后得到的倒T型中间坯进行粗轧，减小坯料厚度，增加坯料宽度；
    步骤4)对步骤3)粗轧后的坯料进行精轧，对坯料与单齿履带板的主板、侧翼和齿板相对应的各部位进行精确成型后制得单齿履带板，其中，右平肢轧制成单齿履带板的主板，第二中柱轧制成单齿履带板的侧翼，左平肢轧制成单齿履带板的齿板。
PCT/CN2022/109504 2022-07-26 2022-08-01 一种单齿履带板开坯孔型及热轧方法 WO2023098123A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210887603.2A CN115007641B (zh) 2022-07-26 2022-07-26 一种单齿履带板开坯孔型及热轧方法
CN202210887603.2 2022-07-26

Publications (1)

Publication Number Publication Date
WO2023098123A1 true WO2023098123A1 (zh) 2023-06-08

Family

ID=83080288

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/109504 WO2023098123A1 (zh) 2022-07-26 2022-08-01 一种单齿履带板开坯孔型及热轧方法

Country Status (2)

Country Link
CN (1) CN115007641B (zh)
WO (1) WO2023098123A1 (zh)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4420962A (en) * 1981-09-02 1983-12-20 Walker Forge, Inc. Method of cold coining a toothed segment for an endless track wheel and two-piece die therefor and article formed thereby
SU1676689A1 (ru) * 1989-10-16 1991-09-15 Орско-Халиловский металлургический комбинат Калибр дл прокатки башмаков
CN102321841A (zh) * 2011-10-08 2012-01-18 攀钢集团攀枝花钢铁研究院有限公司 抗拉强度达到1300MPa的履带板用钢及其制造方法
CN103350114A (zh) * 2013-07-19 2013-10-16 莱芜钢铁集团有限公司 履带型钢轧辊双孔型及轧制方法
CN103447443A (zh) * 2013-08-30 2013-12-18 衡水中铁建铸锻有限公司 单齿履带板半开半闭式制坯模及单齿履带板锻造方法
CN105458002A (zh) * 2015-11-30 2016-04-06 山东钢铁股份有限公司 一种热轧履带板用粗轧机孔型系统以及履带板的热轧方法
CN212639190U (zh) * 2020-05-12 2021-03-02 中冶南方工程技术有限公司 型钢码垛线及型钢轧制生产线
CN215785675U (zh) * 2021-08-25 2022-02-11 山东钢铁股份有限公司 用于轧制双齿履带钢的轧辊组件和轧机

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202343561U (zh) * 2011-11-23 2012-07-25 莱芜市东远型钢有限公司 小型轧机轧制推土机用履带板型钢的左旋孔型轧辊
CN113560341A (zh) * 2021-08-25 2021-10-29 山东钢铁股份有限公司 用于轧制双齿履带钢的轧辊组件和轧机

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4420962A (en) * 1981-09-02 1983-12-20 Walker Forge, Inc. Method of cold coining a toothed segment for an endless track wheel and two-piece die therefor and article formed thereby
SU1676689A1 (ru) * 1989-10-16 1991-09-15 Орско-Халиловский металлургический комбинат Калибр дл прокатки башмаков
CN102321841A (zh) * 2011-10-08 2012-01-18 攀钢集团攀枝花钢铁研究院有限公司 抗拉强度达到1300MPa的履带板用钢及其制造方法
CN103350114A (zh) * 2013-07-19 2013-10-16 莱芜钢铁集团有限公司 履带型钢轧辊双孔型及轧制方法
CN103447443A (zh) * 2013-08-30 2013-12-18 衡水中铁建铸锻有限公司 单齿履带板半开半闭式制坯模及单齿履带板锻造方法
CN105458002A (zh) * 2015-11-30 2016-04-06 山东钢铁股份有限公司 一种热轧履带板用粗轧机孔型系统以及履带板的热轧方法
CN212639190U (zh) * 2020-05-12 2021-03-02 中冶南方工程技术有限公司 型钢码垛线及型钢轧制生产线
CN215785675U (zh) * 2021-08-25 2022-02-11 山东钢铁股份有限公司 用于轧制双齿履带钢的轧辊组件和轧机

Also Published As

Publication number Publication date
CN115007641B (zh) 2023-04-28
CN115007641A (zh) 2022-09-06

Similar Documents

Publication Publication Date Title
WO2006102835A1 (fr) Procede de coulage et de laminage en continu d’une tole moyenne
CN103386419B (zh) 大展宽比钢板头尾宽度的控制方法
WO2022111191A1 (zh) 一种帽型钢轧制方法及帽型钢
CN100467147C (zh) 一种单机架无槽轧制大规格方钢的方法
CN105665443A (zh) 一种宽厚板轧机生产极限规格管线钢的轧制工艺
CN100538150C (zh) J字形冷弯型钢结构及轧制工艺
CN201150930Y (zh) 一种用于带钢轧制的强迫展宽孔型结构
WO2023098123A1 (zh) 一种单齿履带板开坯孔型及热轧方法
CN110860561A (zh) 短流程冷、热轧协调控制电工钢平直截面的方法
CN112872027A (zh) 一种大型h型钢轧制新工艺
WO2012019515A1 (zh) 一种矩形铸坯结晶器
KR20240094014A (ko) 단일 톱니 트랙 슈 코깅 홀형 및 열간 압연 방법
CN114653907B (zh) 基于全新压下模式改善高碳钢小方坯铸坯均质性的方法
CN104504169A (zh) 实现多向大塑性应变棒材轧制的m型新型孔型结构设计
CN215467046U (zh) 角钢孔型
CN210648414U (zh) 一种方坯拉矫机铸轧辊
CN203621418U (zh) 一种组合式结晶器连续变截面形状的窄边铜板
CN210023250U (zh) 一种轧制h250×255型钢粗轧机开口平轧孔型
CN108396241B (zh) 一种420MPa级LP钢板及其生产方法
CN109622905A (zh) 一种大方坯连铸拉矫机高次多项式曲线凸型辊设计方法
JPS6044101A (ja) Ｕ形鋼矢板の圧延方法
CN2576370Y (zh) 槽钢轧件矫直机
CN109775560A (zh) 一种新型断面异型钢及其生产方法
CN109647880B (zh) 一种人防用门框钢的热轧成型工艺
CN114749481B (zh) 一种铁塔用60°角钢的热轧生产工艺

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22899943

Country of ref document: EP

Kind code of ref document: A1