• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    This invention is concerned with the production of steel fiber by machining a thick steel plate or block for reinforced concrete, where a milling cutter having a plurality of cutting edges is positioned on the steel plate or block and is moved relatively in the horizontal direction. A surface of said plate or block is machined by the rotating cutting edges to chop steel fibers of approximate triangular in cross section. According to this method, steel fibers of high quality may be economically produced.
    公开号:SU1429946A3
    申请号:SU772486552
    申请日:1977-05-24
    公开日:1988-10-07
    发明作者:Накагава Такео；Аида Кейносука
    申请人:Такео Накагава и Кейносука Аида (JP)；
    IPC主号:
    专利说明:

    1st year

    (/
    ten
    t5
    25
    The invention relates to a material for concrete concrete, the purpose of the invention is to increase the strength and adhesion to concrete, /
    FIG. 1 given perspective view of the shaving material; Fig 2-4 shows the reinforcing material; cross sections J in FIG. 5 and b are diagrams characterizing the methods for producing steel fibers.
    . The reinforcing material is steel fibers in the form of needles 1, twisted in length by 12-43, having:; a triangular cross-section with an area of 0.1-0.4 mm and a relief 2 on one side. Needles 1 are made / length 20-50 m-1.
    The cross-section of steel fibers 1 may be in the form of a straight angle 2Q of which, an obtuse and acute triangle. Steel fibers are obtained by mechanically machining a thick steel sheet or bar with a cutter having multiple blades, the sheet or bar is displaced relative to the rotating cutter in the horizontal direction.
    Steel fiber 1 has a wavy surface 2 along the entire length on the side that is not in contact with the front surface of the cutter blade, thereby increasing the surface area of the specified side and, therefore, improves adhesion with concrete. Steel fiber 1 has a high ductility, which provides the possibility of dense molding without cracking, and its strength is significantly Bbmie than that of the starting material, due to the fact that shearing deformation occurs and the work hardening occurs during milling.
    Example 1. Steel fibers were obtained by a method whose scheme is shown in FIG. 5 and which is characterized by the following parameters: a thick sheet or bar; (thickness 25 mm), SS 41 (material I) j 0.08% C, super-normalized steel (material 11), 0.08% C, super-soft 50 annealed steel (material III),
    thirty
    35
    -
    45
    Cutter parameters: diameter 100, number of blades 12, rake angle Q Oj helix angle 15, 1irin blade – 50 mm.
    Processing mode: - cutting depth t 0.5 mm, feed S per blade
    -
    0.51 mm, V processing speed
    22.6 m / min, rpm 72 rpm
    The sheet or bar was moved using a table at a speed of 440 mm / min.
    The steel fibers obtained under these conditions of each of the materials I, II and III had a length of 30 mm, a rectangular cross section and a twist value of 12 ° / cm.
    Table 1 shows a comparison of the cross-sectional area and strength of 6g for stretching of the proposed steel fibers and steel fibers obtained by cutting with scissors.
    25
    2Q
    50
    thirty
    35
    55
    Example 2. Steel fibers were obtained by a milling method (Fig. 6), in which a thick sheet or bar (thickness 30 MM) SS 41 was used,
    The parameters of the cutter: diameter 100, the number of blades 10, front ugoA Q 0; angle with helix 15, blade width 30 mm.
    Processing mode: cutting depth t 0.45 mm, feed S per blade 0.8, processing speed V 63 m / min, speed 200 rpm, table feed 1.6 r / min.
    The steel fibers obtained under the Ordered Conditions had a length of 30 mm, a twist value of 12 / cm, a cross section of 0.33 mm, and a strength of 6. for a stretch of 71.2 kg / mm.
    D
    These steel fibers were mixed in the amount of 0, 1.0 and 2.5% into concrete (50% water and 50% concrete), the max- mum (the Siman's size of the skeletal matrix, which was 15 mm, resulted in a steel reinforced concrete was obtained in the form of a product with a size of 10 "10 40 cm. This product was tested for flexural strength, the product was installed at both ends on supports at a length of 5 cm, and a load was applied to its middle part. this product was prepared under the same conditions as concrete reinforced with fiber obtained with special cutting scissors and having a size of 0,5x0,5 30 mm. The results showed that the proposed product that has excellent flexural strength. The fibers have high strength, high surface area due to undulation n high soprotiv45
    extraction, due to their twisting.
    Making steel fibers with a cutter with a modified lifting angle shows (Table 2) that as the helix angle increases, the amount of fiber twist and tensile strength increase.
    权利要求:
    Claims (4)
    [1]
    1. The reinforcing material, including steel fibers in the form of needles, twisted in length and with a relief on the surface, characterized in that, in order to increase strength and adhesion to concrete, the needles are made 20-50 mm long, twisted 43 in length and have a triangular cross section with an area of 0.1-0.4 m and a relief on one side.
    [2]
    2. Material u and so, the river section angle.
    [3]
    3. Material u and so, the river section angle.
    [4]
    4. Material u and so, the river section angle.
    POP.1, distinguished by that triangular trans-rectangular trePOP .1, distinguished by that triangular trans-obtuse-angled trePOP .1, distinguished by that triangular by pope-acute triangle
    I was going to live
    15 25
    0.22 0.19
    Table 1
    table 2
    65 72
    12 43
    B - 0 Fig.g
    IPliZ.S
    Rig.Z
    fPuB.
    UZ.6
    类似技术:
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    DE82228C|
    CH251460A|1947-10-31|Process for the production of light metal wool and device for carrying out the process.
    AT204759B|1959-08-10|Saw blade for wood saws and process for its manufacture
    SU859511A1|1981-08-30|Rope
    同族专利:
    公开号 | 公开日
    JPS5341247B2|1978-11-01|
    DE2723382C3|1982-02-04|
    DE2723382A1|1977-12-08|
    JPS52144424A|1977-12-01|
    US4298660A|1981-11-03|
    DE2723382B2|1981-01-22|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP5919076A|JPS5341247B2|1976-05-24|1976-05-24|
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