CN113578984A - Average partial compression ratio die matching method for water tank wire drawing - Google Patents
Average partial compression ratio die matching method for water tank wire drawing Download PDFInfo
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- CN113578984A CN113578984A CN202110795032.5A CN202110795032A CN113578984A CN 113578984 A CN113578984 A CN 113578984A CN 202110795032 A CN202110795032 A CN 202110795032A CN 113578984 A CN113578984 A CN 113578984A
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- compression ratio
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
- B21C1/02—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums
- B21C1/04—Drawing metal wire or like flexible metallic material by drawing machines or apparatus in which the drawing action is effected by drums with two or more dies operating in series
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- 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
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/30—Computing systems specially adapted for manufacturing
Abstract
The invention discloses an average partial compression ratio die matching method for water tank wire drawing, which comprises the steps of firstly calculating a total compression ratio Q, calculating an average partial compression ratio according to Q, and calculating the sum of the compression ratios of all passes according to the average partial compression ratio; and calculating the compression ratio of the intermediate pass part according to the average part compression ratio, and calculating the compression ratio of the first pass part and the compression ratio of the last pass part according to the compression ratio of the intermediate pass part and the sum of the compression ratios of all passes. The problem that the wire outlet quality and the production efficiency (wire breakage rate) of the steel wire are influenced by the die matching is solved, the service lives of the wire drawing cone pulley and the die are prolonged, and the energy consumption is reduced; meanwhile, the method can rapidly determine the main parameters of the die matching process through an EXCEL table.
Description
Technical Field
The invention belongs to the technical field of production and manufacturing of a metal wire product in a wet drawing process, and particularly relates to an average partial compression ratio die matching method for water tank drawing.
Background
Most of the existing water tank wire drawing machines draw steel wires through a plurality of dies, and the die matching process is to determine various parameters in the drawing process according to various conditions and constraints. The die matching method of the wire drawing machine mainly comprises the following steps: the method comprises six kinds of matching curves, namely uniform sliding coefficient matching, partial compression ratio matching, absolute coefficient matching, sliding rate matching, sliding coefficient equal ratio sequence matching, low sliding coefficient matching and the like. The die matching theories used by the die matching modes have certain differences, different die matching process parameters can be obtained by adopting different die matching modes, the die matching methods are various and have more problems, and some methods are not suitable for drawing production of high-carbon steel wire drawing superfine wires (such as silicon wafer cutting wire drawing).
Disclosure of Invention
The invention aims to provide a novel die matching method for wire drawing of a sliding water tank, namely a die matching method for average partial compression ratio, and solves the problems of die matching influence, particularly high-carbon steel wire drawing superfine steel wire outlet quality and wire breakage rate.
In order to achieve the aim, the invention provides a partial compression ratio die matching method for water tank wire drawing, which comprises the following steps:
according to
Calculating the total compression ratio Q, dkThe diameter d of the steel wire in the pass of the finished product0The diameter of the incoming wire is defined, and k is the drawing pass;
according to
Calculating an average partial compression ratio;
according to the formula A ═ k · qcpCalculating the sum of the compression ratios of all the passes;
according to q2＝q3＝……＝qk-1＝qcp×K2Calculating the compression ratio of the middle pass part;
according to q1＝K1×[A-(k-2)×qk-1]Calculating the first pass partial compression ratio, K1Is a coefficient;
according to qk＝A-q1-(k-2)×qk-1And calculating the compression ratio of the k-th pass part.
Further, the partial compression ratio of each pass is obtained through a formula dn＝dn-1×SQRT(1-qn) The wire diameter of each pass is determined, n is any pass, and 1, 2, 3, … … and k are taken.
Further, the diameter of each pass of steel wire is reserved with three decimal places according to a formula dn＝dn-1×SQRT(1-qn) Correcting each pass partial compression ratio qn。
Further, according to dnThe elongation coefficient mu of each pass is obtainedn：μn＝(dn-1/dn)2。
Further, said K2Taking 1.013-1.025.
Further, said K1Taking 0.51-0.53.
Compared with the prior art, the invention has the following advantages: the method for distributing the dies with the average partial compression rate solves the problem that the distribution of the dies influences the outgoing quality and the breakage rate of the high-carbon steel wire drawn superfine steel wire, and simultaneously prolongs the service life of the drawing cone pulley and the dies; meanwhile, the method can rapidly determine the main parameters of the die matching process through an EXCEL table.
Drawings
FIG. 1 is a graph of compression ratio for a compression ratio match correction of an average partial compression ratio according to the present invention;
FIG. 2 is a graph of the compression ratio of the uniform sliding coefficient matched mold;
FIG. 3 is a graph of slip ratio and compression ratio.
Detailed Description
The invention will be more clearly understood from the following detailed description of the invention taken in conjunction with the accompanying drawings and specific examples, which are not to be construed as limiting the invention.
The sliding coefficient, the machine coefficient and the elongation coefficient are the three most critical parameters in the water tank wire drawing machine die matching process. The die matching calculation is one of the most important parts in the drawing process, and the quality of the die matching not only influences the wire outlet quality of the steel wire, but also influences the wire breakage rate, and simultaneously influences the service lives of a cone pulley and a die of a wire drawing machine.
The main die matching technological parameters influencing the drawing quality of the steel wire comprise: the drawing machine comprises a machine body, a local sliding coefficient, a compression ratio, a drawing speed, a drawing pass, a machine coefficient, a cone pulley diameter, a rotating speed gradient and the like, wherein the following drawing pass, the machine coefficient, the cone pulley diameter, the rotating speed gradient and the like are determined by the structure of the machine body.
According to the analysis of the factor of the interruption rate of the steel wire drawing process, the main parameters influencing the die matching quality are as follows: sliding coefficient, local compression ratio and safety factor; the main parameters for evaluating the excellence of the mold matching scheme are as follows: local compressibility, slip coefficient and safety factor.
The die matching method of the wire drawing machine mainly comprises the following steps: the method comprises the following steps of uniform sliding coefficient matching, partial compression ratio matching, absolute coefficient matching, sliding rate matching, sliding coefficient equal ratio sequence matching, low sliding coefficient matching and the like. Different die matching process parameters can be obtained by adopting different die matching modes. The final purpose of die matching is to arrange a complete drawing theory, unify die matching parameters, select an optimal die matching mode, obtain a local compression ratio, further control a sliding coefficient and control a wire breakage rate so as to adapt to industrial production. The invention adopts the average partial compression ratio die matching, namely a method for distributing the compression ratios of all passes according to the average compression ratio, the compression ratio of the last pass part is minimum, the compression ratio of the first pass part is the second, and the compression ratio of the middle pass part adopts an equal die matching method, and the specific method is as follows:
according to
Calculating the total compression ratio Q, dkThe diameter d of the steel wire in the pass of the finished product0The diameter of the incoming wire is known, k is the drawing pass, and k is generally 21, 23 or 25;
according to
Calculating an average partial compression ratio;
according to the formula A ═ k · qcpCalculating the sum of the compression ratios of all the passes;
q2＝q3＝……＝qk-1＝qcp×K2the compression ratio of the middle pass part is equal, K2Taking 1.013-1.025
q1＝K1×[A-(k-2)×qk-1]＝K1×[A-(k-2)×qcp×K2]；
In which K is1Take 0.51-0.53
qk＝A-q1-(k-2)×qk-1
And (5) obtaining the partial compression ratio of each pass by using an Excel spreadsheet.
By dn＝dn-1×SQRT(1-qn) Obtaining the die drawing diameter of the steel wire in each pass by using an Excel spreadsheet, wherein n is any pass and 1, 2, 3, … … and k are taken;
all the steel wire diameters of each pass are reserved with three decimal places, so that the partial compression ratio q of each pass is correctedn。
Then according to dnThe elongation coefficient [ mu ] of each pass is determinedn：μn＝(dn-1/dn)2. (n is any pass, 1, 2, 3 … …, k can be taken);
according to the invention, by optimizing the die matching method, the problems that the die matching influences the wire outlet quality and the wire breakage rate of the steel wire are solved, meanwhile, the service lives of the wire drawing cone pulley and the die are prolonged, and the energy consumption and the like are reduced; meanwhile, the method can rapidly determine the main parameters of the die matching process through an EXCEL table.
Further details are set forth below in connection with specific examples.
4 groups of cone pulleys and 23-pass water tank wire drawing machines; the wire inlet is 0.85mm, and the wire outlet is 0.11 mm; the outgoing speed of the finished steel wire is 10 m/s.
By adopting the invention, the average partial compression ratio is matched, namely, the compression ratios of all passes are distributed according to the average compression ratio: the first pass and the last pass are minimum, the middle passes are average, and the compression ratio of each pass is determined.
Calculating the total compression ratio
Calculating average pass compressibility
Calculating the sum of the compression ratios of each pass
A＝k·qcp＝23×16.29％＝374.67％
According to the formula q2＝q3＝……＝qk-1＝qcp×K2Calculating the compression ratio of the middle pass part to be 16.70%, and then calculating the compression ratios of the first pass and the last pass to be q1＝12.47％，q2311.50%, so
12.47％+16.70％×21+11.50％＝374.67％＝A
By the formula
Obtaining:
so d23＝0.110mm
……
d0＝0.850mm
All the pass die-matching diameters are reserved with three decimal places, so that the partial compression ratio q of each pass is correctedn
All the correction results are summarized in Table 1, and
A'＝12.52％+16.61％+…+11.61％＝374.42％≈A
calculating the elongation coefficient mu of each passn
μn＝(dn-1/dn)2
The compression ratio using the average portion is matched as shown in table 1.
Table 123 average pass partial compression ratio matched die
The mean slip coefficient is matched as shown in Table 2
Table 223 pass average sliding coefficient matching die
The slip ratio profile (i.e., low slip coefficient profile) is shown in Table 3
Table 323 pass sliding rate die
Fig. 1 is a graph of compression ratio of the mean partial compression ratio die matching correction of the present invention, fig. 2 is a graph of mean slip coefficient die matching compression ratio, and fig. 3 is a graph of slip ratio die matching compression ratio. It can be seen that the compression ratio curve of the local compression ratio die matching of the invention is smoother, and the die matching effect is better.
Claims (6)
1. A method for matching average partial compression ratio for water tank wire drawing is characterized in that: the die matching method comprises the following steps:
according to
Calculating the total compression ratio Q, dkThe diameter d of the steel wire in the pass of the finished product0The diameter of the incoming wire is defined, and k is the drawing pass;
according to
Calculating an average partial compression ratio;
according to the formula A ═ k · qcpCalculating the sum of the compression ratios of all the passes;
according to q2＝q3＝……＝qk-1＝qcp×K2Calculating the partial compression ratio of the middle pass, K2Is a coefficient;
according to q1＝K1×[A-(k-2)×qk-1]Calculating the first pass partial compression ratio, K1Is a coefficient;
according to qk＝A-q1-(k-2)×qk-1And calculating the compression ratio of the k-th pass part.
2. The method for matching average partial compression ratio for drawing wire in water tank according to claim 1, wherein: according to the partial compression ratio of each pass through a formula dn＝dn-1×SQRT(1-qn) The wire diameter of each pass is determined, n is any pass, and 1, 2, 3, … … and k are taken.
3. The method for matching average partial compression ratio for drawing wire in water tank according to claim 2, wherein: all the steel wire diameters of all the passes are kept three decimal places according to a formula dn＝dn-1×SQRT(1-qn) Correcting each pass partial compression ratio qn。
4. According to claim 2The average partial compression ratio die matching method for water tank wire drawing is characterized by comprising the following steps of: according to dnThe elongation coefficient mu of each pass is obtainedn：μn＝(dn-1/dn)2。
5. The partial compression rate die-matching method for water tank drawing according to claim 1, characterized in that: said K2Taking 1.013-1.025.
6. The method for matching average partial compression ratio for drawing wire in water tank according to claim 1, wherein: said K1Taking 0.51-0.53.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114888105A (en) * | 2022-05-10 | 2022-08-12 | 江西中臻通讯科技有限公司 | Mould ratio detection device is used in production of phosphor bronze alloy line |
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