Stainless steel wire drawing process based on plastic deformation stability control

Abstract

The invention relates to the technical field of wire manufacturing, and in particular to a stainless steel wire drawing process based on plastic deformation stability control; the process comprises: a pre-drawing process and a finished product drawing process; the pre-drawing process comprises: stainless steel wire rod, molding, continuous drawing, rough drawing, first wire diameter inspection, and rough withdrawal; the finished product drawing process comprises: a thick wire finished product drawing process, a medium-thick wire finished product drawing process, and a thin wire finished product drawing process; the processing diameter parameter of the continuous drawing is determined according to a spline curve bisection test method; by approaching a baseline with both sides of the bisection method, it can be accurately and quickly determined whether there are parameters that make the product wire diameters of continuous drawing (continuous drawing) and rough drawing (rough drawing) more stable outside the baseline, and more optimized non-uniform continuous drawing parameters can be obtained, or uniform continuous drawing can be verified as the optimal continuous drawing parameter.

Description

Technical Field

[0001] The invention relates to the technical field of wire manufacturing, in particular to a stainless steel wire drawing process based on plastic deformation stability control. Background Art

[0002] The main varieties of steel wire ropes include phosphate coated steel wire ropes, galvanized steel wire ropes, stainless steel wire ropes and smooth steel wire ropes, which are made of wire rods and rope cores as the main materials and grease as the auxiliary materials. The steel wire rope production process mainly includes the following parts: steel wire drawing, die repair technology, heat treatment normalizing, quenching process, pickling and phosphating process, steel wire rope production process, steel wire rope core processing process, wooden wheel manufacturing process, steel wire rope packaging process, etc. Among them, the most critical are the three links of steel wire drawing, heat treatment and steel wire rope production, which are often the most likely to affect the quality of steel wire ropes; and cold drawing is to forcibly stretch the steel bar at room temperature with a tensile stress exceeding the original steel bar yield point strength, so that the steel bar produces plastic deformation to achieve the purpose of increasing the steel bar yield point strength and saving steel.

[0003] The related technology of steel wire manufacturing is disclosed in the prior art:

[0004] The Chinese patent with publication number CN116159876A discloses a bright spring steel wire production process; specifically disclosed: comprising the following steps: S1 film treatment: using a film agent to perform online film treatment on the steel wire and drying; S2 primary cold drawing deformation: performing multiple cold drawing deformations on the steel wire treated with S1 film, controlling the semi-finished product to reserve 85-90% of the finished product surface reduction rate relative to the size of the finished product; S3 online bright annealing: using continuous bright heat treatment, first using a cleaning agent to clean after laying out the wire, then washing with water, drying, entering a tubular furnace for online annealing, passing a mixed gas into the tube for protection, water cooling and drying after leaving the furnace; S4 secondary cold drawing deformation: performing multiple cold drawing deformations again, the surface reduction rate is 85-90% of the reserved in step S2, and a spring stainless steel wire semi-finished product is obtained; S5 wire rolling: performing surface wire rolling on the steel wire semi-finished product obtained in step S4 to obtain a spring steel wire finished product, through the wire rolling process, environmental protection and energy saving, and improving the surface quality of the product.

[0005] The Chinese patent with the authorization announcement number CN113560460B discloses a hard stainless steel wire for making a shot blasting line and its processing technology; specifically disclosed: including a steel wire body, the steel wire body includes an inner steel wire and an outer steel wire assembly arranged outside the steel wire body, the outer steel wire assembly includes a protective steel wire, and the protective steel wire is provided with multiple, and the outer side of the inner steel wire is provided with multiple bending grooves at equal intervals along the length direction, and the bending groove is a ring structure. In the present invention, the bending groove is provided to provide a bending space for the bending part of the steel wire, so as to avoid the phenomenon that the bending part of the steel wire is cracked due to the inner side extrusion and the outer side stretching after bending, thereby solving the problem that the bending part of the steel wire is easy to break after bending, and then improving the stability of the steel wire when bending.

[0006] The Chinese patent with the authorization announcement number CN112427482B discloses a method for processing stainless steel / carbon steel bimetallic composite wire; specifically disclosed: comprising the following steps: step 1, blank material processing. The inner and outer walls of the stainless steel tube and the carbon steel material are surface treated, cleaned and dried, and the carbon steel is implanted into the stainless steel tube; step 2, wire rod processing. The blank in step 1 is combined by hot forging, and then hot rolled into a wire rod; step 3, stainless steel / carbon steel bimetallic composite wire roller die drawing. After the wire rod in step 2 is heat treated and surface treated, it is drawn into a wire of a certain diameter by a roller die; step 4, stainless steel / carbon steel bimetallic composite wire hole-type wire drawing. The wire drawn by the roller die in step 3 is then cold-drawn by a hole-type wire drawing die to be a stainless steel / carbon steel bimetallic composite wire. The method has a simple process flow and low cost. The surface quality of the manufactured stainless steel / carbon steel composite wire is stable, the internal stress distribution is uniform, and it is easy to mass produce.

[0007] However, the above prior art still has the following problems:

[0008] 1. The default sampling method of continuous stretching is uniform stretching, that is, the shrinkage amount of each stretching is the same, and it is not known whether uniform stretching is necessarily due to non-uniform stretching;

[0009] 2. A few existing technologies disclose sampling of non-uniform stretching in the continuous stretching process, but the parameters of the non-uniform continuous stretching are arbitrarily controlled, and it is impossible to accurately find the optimal parameters, and it is impossible to confirm or disprove "whether the non-uniform continuous stretching is better than the uniform continuous stretching". Summary of the invention

[0010] In view of the above problems, the object of the present invention is to propose:

[0011] A stainless steel wire drawing process based on plastic deformation stability control includes: a pre-drawing process and a finished product drawing process; the pre-drawing process includes: stainless steel wire rod, molding, continuous drawing, rough drawing, first wire diameter inspection, rough withdrawal; the finished product drawing process includes: a thick wire finished product drawing process, a medium-thick wire finished product drawing process, and a thin wire finished product drawing process; the processing diameter parameter of the continuous drawing is determined according to a spline curve binary test method; the spline curve binary test method includes the following steps:

[0012] S1. Determine the initial wire diameter and the final wire diameter of the continuous stretching process; wherein the initial wire diameter Indicates the wire diameter of the stainless steel wire rod when it is fed into the continuous stretching equipment after film making; the ending diameter It indicates the diameter of the steel wire when it leaves the stretching equipment after being stretched;

[0013] S2. Determine the number of stretching times in the continuous stretching process; Determine the number of stretching times of the steel wire in the continuous stretching process according to the specifications of the continuous stretching equipment. ;

[0014] S3, drawing a coordinate system and a reference line of the continuous stretching process; the coordinate system is an XOY orthogonal coordinate system, and the reference line is a line segment determined according to the initial wire diameter and the terminal wire diameter;

[0015] S4, determine the fixed control points, dynamic control points and spline curve; take the initial line diameter and the final line diameter as fixed control points, stretch the line half of the time The points are used as dynamic control points to draw the spline curve and determine the spline curve function;

[0016] S5. Determine the continuous stretching test parameters based on the spline curve function; substitute the natural number sequence into the spline curve function to determine the stretching diameter sequence as the parameters of the continuous stretching process;

[0017] S6, rough stretching test; inputting the continuous stretching test parameters determined based on the spline curve function in each round into the continuous stretching machine, and testing the wire diameter fluctuation amount after rough stretching of the steel wire stretched by the continuous stretching test parameters;

[0018] S7, cycle test: cyclically execute step S5 and step S6;

[0019] S8, selecting optimal spline curve parameters; selecting a spline curve that minimizes the wire diameter fluctuation as the optimal continuous stretching spline curve, and determining optimal continuous stretching parameters;

[0020] S9. Optimal parameter continuous stretching production; use the optimal continuous stretching parameters for large-scale production.

[0021] Furthermore, step S3 specifically includes:

[0022] S31. Draw an XOY orthogonal coordinate system with the wire diameter as the ordinate and the natural number as the abscissa;

[0023] S32, the two endpoints and Marked on the XOY orthogonal coordinate system;

[0024] S33, a line segment connects two endpoints and , get the baseline of the continuous stretching process;

[0025] S34, the baseline of the continuous stretching process satisfies the function: .

[0026] Furthermore, step S4 specifically includes:

[0027] S41, the two endpoints and Determined as a fixed control point;

[0028] S42, will Determined as a dynamic control line;

[0029] S43, will Dynamic control point, the dynamic control point moves on the dynamic control line;

[0030] in, Indicates The Y-axis coordinate of the dynamic control point determined by the round test, is a natural number, The maximum value is a positive integer that is preset manually ,satisfy:

[0031]

[0032] S44, with two fixed control points and and left dynamic control point Draw a spline curve and determine the left spline function ;

[0033] With two fixed control points and and right dynamic control point Draw a spline curve and determine the right spline function .

[0034] Furthermore, step S5 is specifically: convert the natural number sequence Substitute into the left spline curve function respectively and right spline function , get the left spline curve coordinate point set representing the stretching parameters and the right spline coordinate point set ,in, and Respectively expressed in In the left spline curve and the right spline curve of the round test, The stretching diameter that should be set for the secondary stretching is and ;

[0035] Further, step S6 specifically includes:

[0036] S61, the continuous stretch test parameters determined based on the spline curve function and Input the continuous stretching machine to determine the wire diameter for each stretching;

[0037] S62, after continuous stretching, the steel wire is subjected to rough stretching with fixed parameters;

[0038] S63. Detect the wire diameter of the steel wire after rough stretching and calculate the absolute value of the left cumulative fluctuation of the wire diameter and the absolute value of the right cumulative fluctuation ,satisfy:

[0039]

[0040] in, and Indicates the first The detected value of the wire diameter at each position, Indicates the set value of the wire diameter after rough drawing.

[0041] Further, step S7 is specifically: looping through step S5 and step S6, each loop being once, The value is increased by 1, so that the spline curve approaches the baseline from both sides, and the absolute value of the left cumulative fluctuation of each trial is calculated. and the absolute value of the right cumulative fluctuation , until the preset number of tests is reached .

[0042] Further, step S8 is specifically: select the absolute value of the left cumulative fluctuation Or the absolute value of the right cumulative fluctuation The smallest spline curve is taken as the optimal continuous spline curve, and the optimal continuous parameters are determined. .

[0043] Furthermore, the spline curve is one of an interpolation spline curve, an approximation spline curve, a uniform spline curve, a non-uniform spline curve, a natural spline curve or a B-spline curve.

[0044] The beneficial effects of the present invention are:

[0045] The present invention provides a method for optimizing continuous stretching parameters by approaching a baseline on both sides of a dichotomy. The method is based on the traditional concept of "uniform continuous stretching". On this basis, the stability of the wire diameter after plastic deformation in subsequent rough stretching is used as an investigation parameter. By approaching the baseline on both sides of the dichotomy, it is possible to accurately and quickly determine whether there are parameters outside the baseline that make the product wire diameters of continuous stretching (continuous stretching) and rough stretching (rough stretching) more stable. In this way, more optimized non-uniform continuous stretching parameters can be obtained. Alternatively, if there are no more optimized non-uniform continuous stretching parameters, it can be verified that uniform continuous stretching is the optimal continuous stretching parameter. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Figure 1 It is a schematic diagram of the overall process flow of the present invention. DETAILED DESCRIPTION

[0047] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention. Example

[0048] according to Figure 1 As shown, this embodiment provides a stainless steel wire drawing process based on plastic deformation stability control, including: a pre-drawing process and a finished product drawing process; the pre-drawing process includes: stainless steel wire rod, molding, continuous drawing, rough drawing, first wire diameter inspection, rough withdrawal; the finished product drawing process includes: a thick wire finished product drawing process, a medium-thick wire finished product drawing process, and a thin wire finished product drawing process; the processing diameter parameter of the continuous drawing is determined according to the spline curve binary test method; the spline curve binary test method includes the following steps:

[0049] S1. Determine the initial wire diameter and the final wire diameter of the continuous stretching process; wherein the initial wire diameter Indicates the wire diameter of the stainless steel wire rod when it is fed into the continuous stretching equipment after film making; the ending diameter It indicates the diameter of the steel wire when it leaves the stretching equipment after being stretched;

[0050] S2. Determine the number of stretching times in the continuous stretching process; Determine the number of stretching times of the steel wire in the continuous stretching process according to the specifications of the continuous stretching equipment. ;

[0051] S3, drawing a coordinate system and a reference line of the continuous stretching process; the coordinate system is an XOY orthogonal coordinate system, and the reference line is a line segment determined according to the initial wire diameter and the terminal wire diameter;

[0052] S4, determine the fixed control points, dynamic control points and spline curve; take the initial line diameter and the final line diameter as fixed control points, stretch the line half of the time The points are used as dynamic control points to draw the spline curve and determine the spline curve function;

[0053] S5. Determine the continuous stretching test parameters based on the spline curve function; substitute the natural number sequence into the spline curve function to determine the stretching diameter sequence as the parameters of the continuous stretching process;

[0054] S6, rough stretching test; inputting the continuous stretching test parameters determined based on the spline curve function in each round into the continuous stretching machine, and testing the wire diameter fluctuation amount after rough stretching of the steel wire stretched by the continuous stretching test parameters;

[0055] S7, cycle test: cyclically execute step S5 and step S6;

[0056] S8, selecting optimal spline curve parameters; selecting a spline curve that minimizes the wire diameter fluctuation as the optimal continuous stretching spline curve, and determining optimal continuous stretching parameters;

[0057] S9. Optimal parameter continuous stretching production; use the optimal continuous stretching parameters for large-scale production.

[0058] Furthermore, step S3 specifically includes:

[0059] S31. Draw an XOY orthogonal coordinate system with the wire diameter as the ordinate and the natural number as the abscissa;

[0060] S32, the two endpoints and Marked on the XOY orthogonal coordinate system;

[0061] S33, a line segment connects two endpoints and , get the baseline of the continuous stretching process;

[0062] S34, the baseline of the continuous stretching process satisfies the function: .

[0063] Furthermore, step S4 specifically includes:

[0064] S41, the two endpoints and Determined as a fixed control point;

[0065] S42, will Determined as a dynamic control line;

[0066] S43, will Dynamic control point, the dynamic control point moves on the dynamic control line;

[0067] in, Indicates The Y-axis coordinate of the dynamic control point determined by the round test, is a natural number, The maximum value is a positive integer that is preset manually ,satisfy:

[0068]

[0069] S44, with two fixed control points and and left dynamic control point Draw a spline curve and determine the left spline function ;

[0070] With two fixed control points and and right dynamic control point Draw a spline curve and determine the right spline function .

[0071] Furthermore, step S5 is specifically: convert the natural number sequence Substitute into the left spline curve function respectively and right spline function , get the left spline curve coordinate point set representing the stretching parameters and the right spline coordinate point set ,in, and Respectively expressed in In the left spline curve and the right spline curve of the round test, The stretching diameter that should be set for the secondary stretching is and ;

[0072] Further, step S6 specifically includes:

[0073] S61, the continuous stretch test parameters determined based on the spline curve function and Input the continuous stretching machine to determine the wire diameter for each stretching;

[0074] S62, after continuous stretching, the steel wire is subjected to rough stretching with fixed parameters;

[0075] S63. Detect the wire diameter of the steel wire after rough stretching and calculate the absolute value of the left cumulative fluctuation of the wire diameter and the absolute value of the right cumulative fluctuation ,satisfy:

[0076]

[0077] in, and Indicates the first The detected value of the wire diameter at each position, Indicates the set value of the wire diameter after rough drawing.

[0078] Further, step S7 is specifically: looping through step S5 and step S6, each loop being once, The value is increased by 1, so that the spline curve approaches the baseline from both sides, and the absolute value of the left cumulative fluctuation of each trial is calculated. and the absolute value of the right cumulative fluctuation , until the preset number of tests is reached .

[0079] Further, step S8 is specifically: select the absolute value of the left cumulative fluctuation Or the absolute value of the right cumulative fluctuation The smallest spline curve is taken as the optimal continuous spline curve, and the optimal continuous parameters are determined. .

[0080] Furthermore, the spline curve is one of an interpolation spline curve, an approximation spline curve, a uniform spline curve, a non-uniform spline curve, a natural spline curve or a B-spline curve.

[0081] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. Stainless steel wire drawing process based on plastic deformation stability control, including: Pre-stretching process and finished product stretching process; The pre-stretching process includes: stainless steel wire rod, film making, continuous stretching, rough stretching, first wire diameter inspection, and rough withdrawal; continuous stretching refers to continuous stretching, and rough stretching refers to rough stretching; The finished product stretching process includes: a thick filament finished product stretching process, a medium-thick filament finished product stretching process, and a thin filament finished product stretching process; It is characterized in that: the processing diameter parameter of the continuous stretching is determined according to the spline curve binary test method; The spline curve bisection test method comprises the following steps: S1. Determine the initial wire diameter and the final wire diameter of the continuous stretching process; wherein the initial wire diameter Indicates the wire diameter of the stainless steel wire rod when it is fed into the continuous stretching equipment after film making; the ending diameter It indicates the diameter of the steel wire when it leaves the stretching equipment after being stretched; S2. Determine the number of stretching times in the continuous stretching process; Determine the number of stretching times of the steel wire in the continuous stretching process according to the specifications of the continuous stretching equipment. ; S3, drawing the coordinate system and reference line of the continuous stretching process; the coordinate system is an XOY orthogonal coordinate system, and the reference line is a line segment determined according to the initial wire diameter and the terminal wire diameter; specifically including: S31. Draw an XOY orthogonal coordinate system with the wire diameter as the ordinate and the natural number as the abscissa; S32, the two endpoints and Marked on the XOY orthogonal coordinate system; S33, a line segment connects two endpoints and , get the baseline of the continuous stretching process; S34, the baseline of the continuous stretching process satisfies the function: ; S4, determine the fixed control points, dynamic control points and spline curve; take the initial line diameter and the final line diameter as fixed control points, and stretch half of the times The points are used as dynamic control points to draw a spline curve and determine the spline curve function; specifically including: S41, the two endpoints and Determined as a fixed control point; S42, will Determined as a dynamic control line; S43, will Determined as a dynamic control point, the dynamic control point moves on the dynamic control line; in, Indicates The Y-axis coordinate of the dynamic control point determined by the round test, is a natural number, The maximum value is a positive integer that is preset manually. ,satisfy: ; S44, with two fixed control points and and left dynamic control point Draw a spline curve and determine the left spline function ; With two fixed control points and and right dynamic control point Draw a spline curve and determine the right spline function ; S5. Determine the continuous stretching test parameters based on the spline curve function; substitute the natural number sequence into the spline curve function to determine the stretching diameter sequence as the parameters of the continuous stretching process; S6, rough stretching test; inputting the continuous stretching test parameters determined based on the spline curve function in each round into the continuous stretching machine, and testing the wire diameter fluctuation amount after rough stretching of the steel wire stretched by the continuous stretching test parameters; S7, cycle test: cyclically execute step S5 and step S6; S8, selecting optimal spline curve parameters; selecting a spline curve that minimizes the wire diameter fluctuation as the optimal continuous stretching spline curve, and determining optimal continuous stretching parameters; S9. Optimal parameter continuous stretching production; use the optimal continuous stretching parameters for large-scale production.

2. The stainless steel wire drawing process based on plastic deformation stability control according to claim 1, characterized in that: Step S5 is specifically as follows: The natural number sequence Substitute into the left spline function respectively and right spline function , get the left spline curve coordinate point set representing the stretching parameters and the right spline coordinate point set ,in, and Respectively expressed in In the left spline curve and the right spline curve of the round test, The stretching diameter that should be set for the secondary stretching is and .

3. The stainless steel wire drawing process based on plastic deformation stability control according to claim 2, characterized in that: Step S6 specifically includes: S61, the continuous stretch test parameters determined based on the spline curve function and Input the continuous stretching machine to determine the wire diameter for each stretching; S62, after continuous stretching, the steel wire is subjected to rough stretching with fixed parameters; S63. Detect the wire diameter of the steel wire after rough stretching and calculate the absolute value of the left cumulative fluctuation of the wire diameter and the absolute value of the right cumulative fluctuation ,satisfy: ; in, and Indicates the first The detected value of the wire diameter at each position, Indicates the set value of the wire diameter after rough drawing.

4. The stainless steel wire drawing process based on plastic deformation stability control according to claim 3, characterized in that: Step S7 is specifically: looping through steps S5 and S6, each loop being repeated once. The value is increased by 1, so that the spline curve approaches the baseline from both sides, and the absolute value of the left cumulative fluctuation of each trial is calculated. and the absolute value of the right cumulative fluctuation , until the preset number of tests is reached .

5. The stainless steel wire drawing process based on plastic deformation stability control according to claim 4, characterized in that: Step S8 is specifically: select the absolute value of the left cumulative fluctuation Or the absolute value of the right cumulative fluctuation The smallest spline curve is taken as the optimal continuous spline curve, and the optimal continuous parameters are determined. .

6. The stainless steel wire drawing process based on plastic deformation stability control according to claim 5, characterized in that: The spline curve is one of an interpolation spline curve, an approximation spline curve, a uniform spline curve, a non-uniform spline curve, a natural spline curve or a B-spline curve.

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