High-ductility alloy steel fiber melting wiredrawing forming process

Abstract

The invention relates to a high-ductility alloy steel fiber melting wire-drawing forming process applied to the field of wire-drawing forming, which comprises a coating unit and a wire-drawing unit, the process can simplify the process flow and improve the production efficiency by directly drawing molten alloy steel; the forming quality of steel fibers can be effectively improved by wiredrawing under the condition that the microstructure of the alloy steel is not shaped, and the wiredrawing aperture is adaptively and dynamically adjusted according to the wiredrawing speed by utilizing the characteristic that the wiredrawing module deforms along with the temperature, so that the wiredrawing quality of the steel fibers is effectively improved; and the wire drawing oil mixed with the fluorescent agent is coated on the steel wire at intervals, so that the consumption of the wire drawing oil can be saved, the wire drawing speed can be monitored in real time, the wire drawing aperture can be automatically regulated and controlled according to the detected wire drawing speed, and the steel wire is effectively prevented from being locked.

Description

Technical Field

[0001] The invention relates to a high-ductility alloy steel fiber melt wire drawing forming process, in particular to a high-ductility alloy steel fiber melt wire drawing forming process applied in the wire drawing forming field. Background Art

[0002] Steel fiber is a reinforcing material widely used in the fields of construction and engineering, and is mainly used to improve the mechanical properties of composite materials such as concrete. At present, there are many methods for forming steel fibers, and a suitable forming method is selected according to the characteristics of the steel fibers. For example, a device and method for producing end hook steel fibers with publication number CN114247768B discloses a method for forming end hook steel fibers.

[0003] Wire drawing is also one of the methods for forming steel fibers. For example, a method for preparing stainless steel long fibers with publication number CN1060103C discloses a method for producing steel fibers using a bundle drawing method. Although this method can improve the tensile strength of steel fibers, it requires temperature control and has relatively high requirements for operating accuracy.

[0004] Moreover, in the existing wire drawing forming method, the wire drawing speed is crucial to the forming of steel fibers. Both too fast and too slow speeds are not conducive to the forming of steel fibers. Too fast speeds will lead to increased friction, increased temperature and uneven stress distribution, while too slow speeds will lead to increased elongation and easy breakage of steel fibers. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to adapt to different wire drawing speeds by dynamically adjusting the aperture of the wire drawing die during the wire drawing process.

[0006] In order to solve the above problems, the present invention provides a high ductility alloy steel fiber melt drawing forming process, comprising the following forming steps: S1. Melting and transfer: The alloy material is melted in a metallurgical furnace, and after completion, the molten steel is poured into a ladle and transferred by the ladle; S2, multi-stage wire drawing: Move the ladle to the top of the casting mold, pour molten steel into the mold to form a rough steel wire, first use the wire drawing die to draw the wire in one stage to make the wire diameter uniform, then use wire drawing dies of different specifications to draw the wire in multiple stages from large to small, so that the diameter of the wire reaches 1-2 cm; S3, final wire drawing and processing: let the target steel wire pass through the wire drawing unit for final wire drawing into steel fiber, cut or do other processing on the steel fiber according to the demand, set a coating unit before the wire drawing unit to coat the steel wire at intervals to ensure the lubricity of wire drawing; The coating unit includes a liquid-containing turntable driven by a driving motor to rotate at a constant speed, and the interior of the liquid-containing turntable is filled with drawing oil, and the side wall of the liquid-containing turntable is fixedly connected with a plurality of release arms distributed around at equal intervals, and a release hole is opened at one end of the release arm away from the liquid-containing turntable, and a liquid-sealing magnetic ball is magnetically attracted at the inner port of the release hole, and a touch rod penetrating to the outside of the release hole is fixedly connected to the side wall of the liquid-sealing magnetic ball; The wire drawing unit includes a wire drawing die base and a wire drawing die group penetrating the wire drawing die base and arranged concentrically with the wire drawing die base. The side wall of the wire drawing die base is fixedly connected with two symmetrically distributed cooling channels, and the interior of the wire drawing die base is filled with a coolant circulating through the two cooling channels.

[0007] In the above-mentioned high-ductility alloy steel fiber melt drawing forming process, the production efficiency is effectively improved through multi-stage continuous drawing, and the aperture of the drawing die can be adaptively adjusted according to the drawing speed, effectively improving the forming quality.

[0008] As a further improvement of the present application, the wire drawing module includes a plurality of memory alloy segments distributed in an interval and a yielding segment located between two adjacent memory alloy segments. The yielding segment includes a high-temperature resistant heat-resistant elastic cover and a shaped inner supporting conductive mesh placed inside the heat-resistant elastic cover.

[0009] As a further improvement of the present application, the memory alloy segment is composed of multiple monomers with the same phase change temperature but different phase change amplitudes, and the phase change amplitudes of the multiple monomers are arranged in a gradient along the wire drawing direction.

[0010] As a further improvement of the present application, a fluorescent agent is also mixed in the wire drawing oil, and the mixing ratio of the wire drawing oil and the fluorescent agent is 5-10:2. The interior of the heat-resistant elastic cover is also filled with electrorheological fluid. A fluorescent sensor for detecting the fluorescent agent is also provided between the coating unit and the wire drawing unit, and the fluorescent sensor controls the power on and off of the electrorheological fluid through the control processor.

[0011] As a further improvement of the present application, the inner wall of the wire drawing die base facing the memory alloy segment is also fixedly connected to a plurality of electrostrictive control segments which are equally spaced and distributed around and fixedly connected to the memory alloy segment, and the fluorescent sensor also controls the power on and off of the electrostrictive control segment through the control processor.

[0012] As another improvement of the present application, the wire drawing unit also includes an elastic heat conductive connection layer fixedly connected between the wire drawing die base and the wire drawing die group, and the inner wall of the elastic heat conductive connection layer is fixedly inlaid with multiple semiconductor cooling plates facing the wire drawing die group.

[0013] As another improvement of the present application, an image recognition unit is further provided behind the wire drawing unit, and the image recognition unit is connected to the fluorescence sensor signal.

[0014] As a further improvement of the present application, the fluorescent sensor is also signal-connected to an alarm, and the alarm is set to have multiple working modes with different alarm frequencies according to the moving speed of the steel wire.

[0015] In summary, by directly drawing the molten alloy steel, not only can the process flow be simplified and production efficiency be improved, but also the forming quality of the steel fiber can be effectively improved by drawing when the alloy steel microstructure is not finalized. The characteristic of the drawing module deforming with temperature is utilized to allow the drawing aperture to be adaptively and dynamically adjusted according to the drawing speed, thereby effectively improving the drawing quality of the steel fiber. By periodically applying drawing oil mixed with fluorescent agent on the steel wire, not only can the amount of drawing oil be saved, but the drawing speed can also be monitored in real time, and the drawing aperture can be automatically adjusted according to the detected drawing speed, thereby effectively preventing the steel wire from locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a process flow chart of the first embodiment of the present application; Figure 2 This is a pictogram of the wire drawing process according to the second embodiment of the present application; Figure 3 This is a three-dimensional diagram of a wire drawing unit according to a first embodiment of the present application; Figure 4 This is a front cross-sectional view of a wire drawing unit according to a third embodiment of the present application; Figure 5 This is a side view of the wire drawing die set according to the first embodiment of the present application; Figure 6 This is a dynamic change diagram of the wire drawing die set before and after deformation in the first embodiment of the present application; Figure 7 A side cross-sectional view of the yielding section of the second embodiment of the present application; Figure 8 This is a front cross-sectional view of the coating unit of the first embodiment of the present application; Fig. 9 for Figure 8 A magnified view of the structure at center A; Fig.10 This is a top view of the coating unit of the second embodiment of the present application after coating on the steel wire.

[0017] Description of the numbers in the figure: 1 liquid-containing turntable, 101 drawing oil, 102 fluorescent agent, 2 release arm, 201 release hole, 3 sealing liquid magnetic ball, 4 touch rod, 5 drawing die base, 6 drawing die set, 601 memory alloy segment, 602 yielding segment, 6021 heat-resistant elastic cover, 6022 electrorheological fluid, 6023 shaping inner supporting conductive mesh, 7 elastic thermal conductive connection layer, 8 cooling channel, 9 coolant, 10 electrostrictive control segment, 11 fluorescent sensor. DETAILED DESCRIPTION

[0018] Three implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0019] The first implementation method: like Figure 1 , 2 As shown, the molding steps include: S1. Melting and transfer: The alloy material is melted in a metallurgical furnace, and after completion, the molten steel is poured into a ladle and transferred by the ladle; S2, multi-stage wire drawing: Move the ladle to the top of the casting mold, pour molten steel into the mold to form a rough steel wire, first use the wire drawing die to draw the wire in one stage to make the wire diameter uniform, then use wire drawing dies of different specifications to draw the wire in multiple stages from large to small, so that the diameter of the wire reaches 1-2 cm; S3, final wire drawing and processing: let the target steel wire pass through the wire drawing unit for final wire drawing into steel fiber, cut or do other processing on the steel fiber according to the demand, set a coating unit before the wire drawing unit to coat the steel wire at intervals to ensure the lubricity of wire drawing; Among them, Figure 2 , 8 and Fig. 9 As shown, the coating unit includes a liquid-containing turntable 1 driven by a driving motor (the prior art) to rotate at a uniform speed, and the interior of the liquid-containing turntable 1 is filled with drawing oil 101, and the side wall of the liquid-containing turntable 1 is fixedly connected with a plurality of release arms 2 that are equally spaced and distributed around, and a release hole 201 is opened at one end of the release arm 2 away from the liquid-containing turntable 1, and a liquid-sealing magnetic ball 3 is magnetically attracted at the inner port of the release hole 201, and a feeler rod 4 that penetrates to the outside of the release hole 201 is fixedly connected to the side wall of the liquid-sealing magnetic ball 3, and the coating unit is located directly above the steel wire, and the feeler rod 4 is aligned with the steel wire. While the steel wire is advancing, the liquid-containing turntable 1 rotates at a uniform speed, and when the feeler rod 4 contacts the steel wire, it drives the liquid-sealing magnetic ball 3 to retract, thereby opening the release hole 201 to release the drawing oil 101, so that the drawing oil 101 will be intermittently applied to the steel wire during the uniform rotation of the liquid-containing turntable 1, which can save the amount of the drawing oil 101 and effectively avoid waste; like Figure 3 , 4As shown, the wire drawing unit includes a wire drawing die base 5, and a wire drawing die group 6 that penetrates the wire drawing die base 5 and is concentrically arranged with the wire drawing die base 5. The side wall of the wire drawing die base 5 is fixedly connected with two symmetrically distributed cooling channels 8, and the interior of the wire drawing die base 5 is filled with a coolant 9 that circulates through the two cooling channels 8 (liquid nitrogen is preferably used for cooling, and other coolants can also be selected according to actual conditions, which will not be described in detail here). The cooling channels 8 are connected to an external circulating liquid supply device (the circulating liquid supply device is a prior art), so that the coolant 9 can circulate inside the wire drawing die base 5 through the two cooling channels 8, thereby achieving the purpose of cooling the wire drawing unit, and the wire drawing die group 6 plays a role in drawing steel fibers.

[0020] This embodiment can effectively improve the performance of steel fiber by subjecting the molten steel wire to multi-stage wire drawing while the alloy steel microstructure is in an unformed state, and uses a coating unit to intermittently coat the steel wire with drawing oil 101, which not only saves the amount of drawing oil 101 but also lays the foundation for subsequent monitoring of the speed of the steel wire.

[0021] The second implementation method: Based on the first embodiment, this embodiment further improves the wire drawing module 6, so that the wire drawing unit can be adaptively adjusted dynamically when the wire drawing speed is too fast, effectively preventing the wire drawing speed from being too fast and causing the friction of the steel fiber to increase, thereby causing uneven stress distribution; like Figure 5 , 7 As shown, the wire drawing module 6 includes a plurality of memory alloy segments 601 that are distributed around each other at intervals, and a yielding segment 602 located between two adjacent memory alloy segments 601. The yielding segment 602 includes a heat-resistant elastic cover 6021 that is resistant to high temperatures (polyurethane elastic material is preferably selected, and other materials can also be selected according to actual needs), and a shaped inner supporting conductive mesh 6023 placed inside the heat-resistant elastic cover 6021. When the wire drawing speed of the memory alloy segment 601 is too fast, the heat generated by the friction force is increased to deform itself, thereby expanding the wire drawing aperture and effectively reducing the friction force, thereby ensuring uniform stress distribution inside the steel fiber. The yielding segment 602 can provide deformation space for the memory alloy segment 601 when it is deformed and expanded, and the shaped inner supporting conductive mesh 6023 plays a shaping role to prevent the memory alloy segment 601 from being dislocated during deformation and affecting the steel fiber molding effect; like Figure 6As shown, the memory alloy segment 601 is composed of multiple segments of monomers with the same phase change temperature but different phase change amplitudes (the specific phase change temperature is selected according to the actual situation and will not be described in detail here), and the phase change amplitudes of the multiple segments of monomers are set in a gradient along the drawing direction, so as to allow the steel fiber to have a gradient deformation process, effectively avoiding the uneven stress distribution caused by the instantaneous deformation of the steel fiber. It should be additionally explained that the phase change amplitudes of the multiple segments of monomers can be gradually reduced or gradually increased along the drawing direction, and the aperture of the memory alloy segment 601 can be increased or decreased during the drawing process. The specific setting is determined according to the specific characteristics of the steel wire. In the present application, according to the characteristic of high ductility of alloy steel, the aperture of the memory alloy segment 601 is enlarged when the wire drawing is too fast, and the phase change amplitudes of the multiple segments of monomers are gradually reduced along the drawing direction; like Fig.10 As shown, the wire drawing oil 101 is also mixed with a fluorescent agent 102, and the mixing ratio of the wire drawing oil 101 and the fluorescent agent 102 is 5-10:2, the heat-resistant elastic cover 6021 is also filled with an electrorheological fluid 6022, and a fluorescent sensor 11 for detecting the fluorescent agent 102 is also arranged between the smearing unit and the wire drawing unit, and the fluorescent sensor 11 controls the power on and off of the electrorheological fluid 6022 through the control processor (the specific control structure and working principle are well-known technologies for technicians in the relevant field and are not described in detail here). The fluorescent agent 102 is mixed in the wire drawing oil 101, and the effects of applying lubricant and marking points are achieved at the same time. In this way, during the movement of the steel wire, the fluorescent sensor 11 can monitor the wire drawing speed of the steel wire in real time by detecting the speed of two adjacent marking points, and then When the wire drawing speed is too low and the steel fiber is about to get stuck and pause, the aperture of the wire drawing module 6 is regulated. The specific regulation method is: in the normal wire drawing state, the fluorescent sensor 11 control circuit always energizes the electrorheological fluid 6022. At this time, the electrorheological fluid 6022 is in a solid state, so that the aperture of the yielding segment 602 can remain stable during the wire drawing process. When the fluorescent sensor 11 detects that the wire drawing speed is too low, the fluorescent sensor 11 can cut off the power to the electrorheological fluid 6022 in advance. At this time, the electrorheological fluid 6022 is in a fluid state, which can provide a yielding space for the memory alloy segment 601 to prevent the steel fiber from being over-stretched when the wire drawing speed is too low. After the memory alloy segment 601 completes the deformation, the electrorheological fluid 6022 is energized again to restore it to a solid state, which can effectively maintain the stability of the aperture of the memory alloy segment 601.

[0022] The present embodiment focuses on monitoring the wire drawing speed of the steel wire and adjusting the aperture of the memory alloy segment 601 according to the monitored wire drawing speed, so as to achieve the effect of dynamically adjusting the wire drawing aperture according to the wire drawing speed.

[0023] The third implementation method: This embodiment further improves the control of the memory alloy segment 601 on the basis of the first and second embodiments, mainly to effectively prevent the steel wire from getting stuck during the wire drawing process, and the rest of the parts are consistent with the first and second embodiments; like Figure 4 As shown, the inner wall of the wire drawing die base 5 facing the memory alloy segment 601 is also fixedly connected with a plurality of electrostrictive control segments 10 that are distributed around and fixedly connected to the memory alloy segment 601 at equal intervals, and the fluorescent sensor 11 also controls the power on and off of the electrostrictive control segment 10 through the control processor. When the fluorescent sensor 11 detects that the steel fiber will be locked during the wire drawing process, and the speed of the steel fiber is low before it is about to be locked, the fluorescent sensor 11 triggers the electrostrictive control segment 10 by monitoring the low speed before it is about to be locked, and energizes the electrostrictive control segment 10 to make it contract, and the electrostrictive control segment 10 then pulls the memory alloy segment 601 outward to enlarge its aperture, thereby preventing the steel fiber from being locked. The fluorescent sensor 11 energizes the electrostrictive control segment 10 while also de-energizing the electrorheological fluid 6022, and the two synchronously cooperate to complete the expansion of the aperture of the memory alloy segment 601; like Figure 4 As shown, the wire drawing unit also includes an elastic heat-conducting connection layer 7 fixedly connected between the wire drawing die base 5 and the wire drawing die set 6, and the inner wall of the elastic heat-conducting connection layer 7 is fixedly inlaid with a plurality of semiconductor cooling plates facing the wire drawing die set 6. The elastic heat-conducting connection layer 7 serves to connect the wire drawing die base 5 and the wire drawing die set 6, and in the process of the aperture change of the wire drawing die set 6, the elastic heat-conducting connection layer 7 serves to give way to prevent the aperture of the wire drawing die set 6 from being restricted and unable to be dynamically adjusted. In addition, the semiconductor cooling plates inside the elastic heat-conducting connection layer 7 cool down the friction heat generated by the wire drawing die set 6 during wire drawing, effectively ensuring the service life of the wire drawing die set 6; An image recognition unit (specific structure and operation are prior art) is also provided at the rear of the wire drawing unit, and the image recognition unit is connected to the signal of the fluorescent sensor 11. Scratches and tiny cracks will appear on the steel fiber during the wire drawing process, especially when the wire drawing speed is too fast, too slow, or about to be locked. Therefore, when the fluorescent sensor 11 detects that the wire drawing speed is in the above three states, the fluorescent sensor 11 immediately starts the image recognition unit to perform image inspection on the steel fiber. When an abnormality is detected, the image recognition unit triggers an alarm. Since the coating unit has coated the fluorescent agent 102 on the steel wire, the staff uses a lamp to make the fluorescent agent 102 light up to assist in visual inspection, thereby effectively ensuring the quality of the steel fiber. The fluorescent sensor 11 is also connected to an alarm signal, and the alarm is set to multiple working modes with different alarm frequencies according to the moving speed of the steel wire. The fluorescent sensor 11 triggers the alarm according to the detected wire drawing speed. If the wire drawing speed is too fast, the alarm frequency of the alarm increases. If the wire drawing speed is too slow, the alarm frequency of the alarm decreases. If the wire drawing is about to get stuck, the alarm frequency of the alarm becomes moderate. It should be additionally explained that the alarm frequency of the alarm can be set according to the specific situation, and the alarm mode can also be adjusted, and the alarm can be coordinated with light and voice.

[0024] In summary, by directly drawing the molten alloy steel, not only can the process flow be simplified and the production efficiency be improved, but also the forming quality of the steel fiber can be effectively improved by drawing when the alloy steel microstructure is not finalized. The characteristic of the drawing module 6 that deforms with temperature is utilized to allow the drawing aperture to be adaptively and dynamically adjusted according to the drawing speed, thereby effectively improving the drawing quality of the steel fiber. By periodically applying drawing oil mixed with a fluorescent agent on the steel wire, not only can the amount of drawing oil be saved, but the drawing speed can also be monitored in real time, and the drawing aperture can be automatically adjusted according to the detected drawing speed, thereby effectively preventing the steel wire from locking.

[0025] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. A high ductility alloy steel fiber melt drawing process, characterized in that: The molding process includes the following steps: S1. Melting and transfer: The alloy material is melted in a metallurgical furnace, and after completion, the molten steel is poured into a ladle and transferred by the ladle; S2, multi-stage wire drawing: Move the ladle to the top of the casting mold, pour molten steel into the mold to form a rough steel wire, first use the wire drawing die to draw the wire in one stage to make the wire diameter uniform, then use wire drawing dies of different specifications to draw the wire in multiple stages from large to small, so that the diameter of the wire reaches 1-2 cm; S3, final wire drawing and processing: let the target steel wire pass through the wire drawing unit for final wire drawing into steel fiber, cut or do other processing on the steel fiber according to the demand, set a coating unit before the wire drawing unit to coat the steel wire at intervals to ensure the lubricity of wire drawing; The smearing unit comprises a liquid-containing turntable (1) driven by a driving motor to rotate at a constant speed, and the interior of the liquid-containing turntable (1) is filled with wire drawing oil (101), and the side wall of the liquid-containing turntable (1) is fixedly connected to a plurality of release arms (2) distributed around the turntable at equal intervals, and a release hole (201) is formed at one end of the release arm (2) away from the liquid-containing turntable (1), and a liquid-sealing magnetic ball (3) is magnetically attracted at the inner port of the release hole (201), and a touch rod (4) penetrating to the outside of the release hole (201) is fixedly connected to the side wall of the liquid-sealing magnetic ball (3); The wire drawing unit comprises a wire drawing die base (5), and a wire drawing die group (6) penetrating the wire drawing die base (5) and arranged concentrically with the wire drawing die base (5); the side wall of the wire drawing die base (5) is fixedly connected to two symmetrically distributed cooling channels (8), and the interior of the wire drawing die base (5) is filled with a coolant (9) circulating through the two cooling channels (8).

2. The high ductility alloy steel fiber melt drawing process according to claim 1, characterized in that: The wire drawing die set (6) comprises a plurality of memory alloy segments (601) distributed in an intermittent manner, and a clearance segment (602) located between two adjacent memory alloy segments (601); the clearance segment (602) comprises a high temperature resistant heat-resistant elastic cover (6021), and a shaped inner supporting conductive mesh (6023) placed inside the heat-resistant elastic cover (6021).

3. The high ductility alloy steel fiber melt drawing process according to claim 2, characterized in that: The memory alloy segment (601) is composed of multiple segments of monomers having the same phase change temperature but different phase change amplitudes, and the phase change amplitudes of the multiple segments of monomers are arranged in a gradient along the wire drawing direction.

4. The high ductility alloy steel fiber melt drawing process according to claim 2, characterized in that: The wire drawing oil (101) is also mixed with a fluorescent agent (102), and the mixing ratio of the wire drawing oil (101) and the fluorescent agent (102) is 5-10:

2. The heat-resistant elastic cover (6021) is also filled with an electrorheological fluid (6022). A fluorescent sensor (11) for detecting the fluorescent agent (102) is also provided between the coating unit and the wire drawing unit, and the fluorescent sensor (11) controls the power on and off of the electrorheological fluid (6022) through a control processor.

5. The high ductility alloy steel fiber melt drawing process according to claim 4, characterized in that: The inner wall of the wire drawing die base (5) facing the memory alloy segment (601) is also fixedly connected to a plurality of electrostrictive control segments (10) which are distributed around the memory alloy segment (601) at equal intervals and fixedly connected to the memory alloy segment (601), and the fluorescent sensor (11) also controls the power on and off of the electrostrictive control segment (10) through the control processor.

6. The high ductility alloy steel fiber melt drawing process according to claim 1, characterized in that: The wire drawing unit further comprises an elastic heat-conducting connection layer (7) fixedly connected between the wire drawing die base (5) and the wire drawing die set (6), and a plurality of semiconductor cooling sheets facing the wire drawing die set (6) are fixedly embedded on the inner wall of the elastic heat-conducting connection layer (7).

7. The high ductility alloy steel fiber melt drawing process according to claim 4, characterized in that: An image recognition unit is also provided behind the wire drawing unit, and the image recognition unit is signal-connected to the fluorescence sensor (11).

8. The high ductility alloy steel fiber melt drawing process according to claim 4, characterized in that: The fluorescent sensor (11) is also signal-connected to an alarm, and the alarm is set to have multiple working modes with different alarm frequencies according to the moving speed of the steel wire.

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