CN103406375B - Multi-blank closed type combination hole pattern drawing method - Google Patents
Multi-blank closed type combination hole pattern drawing method Download PDFInfo
- Publication number
- CN103406375B CN103406375B CN201310373483.5A CN201310373483A CN103406375B CN 103406375 B CN103406375 B CN 103406375B CN 201310373483 A CN201310373483 A CN 201310373483A CN 103406375 B CN103406375 B CN 103406375B
- Authority
- CN
- China
- Prior art keywords
- pass
- cross
- blank
- core rod
- wire
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
Landscapes
- Metal Extraction Processes (AREA)
Abstract
一种多坯料闭式组合孔型拉拔方法，属于金属型材拉拔技术领域。其特征是，2根或2根以上轧尖的金属棒线材坯料以单层形式同轴平行紧贴且均匀排布在一根轧尖的硬质芯杆表面，一同经过拉拔模具孔型，坯料在由拉拔模具孔型壁和硬质芯杆表面构成的闭式组合孔型中发生塑性变形，经过一道次拉拔即可一次获得多根横截面形状相同的异型截面金属线材；根据需要可接着进行一道次单线拉拔，生产高尺寸精度的异型截面金属线材。本发明的优点是，节能降耗，道次变形量大，生产效率高，节省拉拔模具，生产成本低，后续一道次单线拉拔和适当退火处理即可短流程高效生产高质量、高性能的异型截面金属线材，特别适宜横截面轮廓有曲线变化的复杂异型截面金属线材的近终形成形。
The invention relates to a multi-blank closed combined pass drawing method, which belongs to the technical field of metal profile drawing. It is characterized in that two or more sharpened metal rods and wires are coaxially parallel and evenly arranged on the surface of a sharpened hard core rod in a single layer, and pass through the pass of the drawing die together. The blank is plastically deformed in the closed combined pass formed by the pass wall of the drawing die and the surface of the hard core rod. After one drawing, multiple metal wires with the same cross-sectional shape can be obtained at one time; as required It can be followed by a single wire drawing to produce metal wires with special-shaped cross-sections with high dimensional accuracy. The invention has the advantages of energy saving and consumption reduction, large amount of deformation per pass, high production efficiency, saving drawing molds, low production cost, and subsequent single-wire drawing and proper annealing treatment can produce high-quality, high-performance products efficiently in a short process Special-shaped cross-section metal wires, especially suitable for near net forming of complex special-shaped cross-section metal wires with curved cross-sectional profiles.
Description
技术领域technical field
本发明属于金属型材拉拔技术领域，特别是提供了一种多坯料闭式组合孔型拉拔方法。The invention belongs to the technical field of metal profile drawing, and in particular provides a multi-blank closed combined pass drawing method.
技术背景technical background
异型截面金属线材是指横截面为非圆形的金属线材，比如横截面为三角形、六边形、八边形、长方形、正方形、梯形、菱形或半圆形等的异型截面金属线材以及横截面轮廓有曲线变化的复杂异型截面金属线材（如边角为圆弧过渡的扇环截面金属线材）等，在电力传输、电子通信、交通运输、机械零部件、日常用品等领域有着极其广泛的用途。进入21世纪以后，由于资源、能源和环境问题的日益突出，向异型截面金属线材的生产提出了短流程、高效率、节能降耗、低成本等要求。特别是，近年来随着国民经济高新科技和国防军工的快速发展，对异型截面金属线材的需求量不断增大，对产品质量和性能的要求也越来越高。Special-shaped cross-section metal wires refer to metal wires with non-circular cross-sections, such as metal wires with special-shaped cross-sections such as triangles, hexagons, octagons, rectangles, squares, trapezoids, rhombuses, or semicircles, and cross-sections. Metal wires with complex special-shaped cross-sections with curved contours (such as metal wires with fan-ring cross-sections whose corners are arc transitions), etc., have extremely wide applications in the fields of power transmission, electronic communications, transportation, mechanical parts, and daily necessities. . After entering the 21st century, due to the increasingly prominent problems of resources, energy and the environment, the production of special-shaped cross-section metal wires has put forward requirements such as short process, high efficiency, energy saving and low cost. In particular, in recent years, with the rapid development of high-tech national economy and national defense and military industry, the demand for special-shaped cross-section metal wires has been increasing, and the requirements for product quality and performance have also become higher and higher.
现有异型截面金属线材的生产主要采用传统的单线拉拔方法，具有拉拔模具设计简单、加工方便，拉拔工艺参数制定较容易，能获得大量不同横截面形状的异型截面金属线材等优点，也是目前生产横截面轮廓有曲线变化的复杂异型截面金属线材的最重要甚至是唯一的方法。但是，采用传统的单线拉拔方法生产异型截面金属线材时，存在着工艺流程长、拉拔道次多、所需拉拔模具量大、拉拔道次变形量小、模具寿命短、产品表面易划伤和产生裂纹、断线频率高、中间退火次数多、生产效率低、克服摩擦所消耗的能量较大、生产成本高、材料利用率低以及异型截面金属线材的质量和性能的一致性与稳定性难以保证、产品的质量和性能难以满足更高使用要求等问题。The existing production of special-shaped cross-section metal wires mainly adopts the traditional single-wire drawing method, which has the advantages of simple drawing die design, convenient processing, easy drawing process parameters, and a large number of special-shaped cross-section metal wires with different cross-sectional shapes. It is also the most important and even the only method for producing metal wires with complex special-shaped cross-sections with curved cross-sectional profiles. However, when the traditional single-wire drawing method is used to produce special-shaped cross-section metal wires, there are problems such as long process flow, many drawing passes, large amount of drawing dies required, small deformation in drawing passes, short die life, and product surface Easy to scratch and produce cracks, high frequency of wire breakage, many times of intermediate annealing, low production efficiency, large energy consumption to overcome friction, high production cost, low material utilization rate and consistency of quality and performance of special-shaped cross-section metal wires It is difficult to guarantee stability, and the quality and performance of products are difficult to meet higher requirements for use.
为了提高异型截面金属线材的生产效率，研究人员开发了同时将2根或2根以上圆形金属坯料直接同轴平行集束穿过拉拔模具，拉拔成形多根异型截面金属线材的多头拉拔方法。由于采用多头拉拔方法生产异型截面金属线材时，金属坯料是同时在同一工艺下拉拔而成的，处于相同的模具、拉拔力、摩擦、拉拔速度以及其他工艺参数条件下，所获得的多根异型截面金属线材具有非常接近的表面质量、形状尺寸、组织结构以及力学性能等，具有生产效率高、产品质量好、生产成本低等优点。但是，在多头拉拔生产异型截面金属线材时，采取的是将2根或2根以上金属坯料直接同轴平行集束穿过拉拔模具进行拉拔的方式，由于这些金属坯料为同种材质，且是同种状态下的，因此相互之间的性质几乎完全相同，所以在拉拔变形过程中，变形能力相同的这些金属坯料在相互接触的界面处受力平衡，使得横截面处的界面形状为直线，因此拉拔成形所得的异型截面金属线材的横截面轮廓（除了每根坯料与拉拔模具接触的部分外）都为直线，可以获得横截面为三角形、六边形、八边形、长方形、正方形、梯形、菱形或半圆形等的异型截面金属线材产品，而无法直接拉拔获得横截面轮廓有曲线变化的复杂异型截面金属线材（如边角为圆弧过渡的扇环截面金属线材）。若要生产复杂异型截面的金属线材，则需后续多道次单线拉拔，导致工艺流程长，所需拉拔模具较多，生产效率低，生产成本高，产品质量和性能难以满足使用要求。In order to improve the production efficiency of metal wires with special-shaped cross-sections, researchers have developed a multi-head drawing method that simultaneously gathers two or more circular metal blanks coaxially and parallelly through the drawing die to form multiple metal wires with special-shaped cross-sections. method. When the multi-head drawing method is used to produce metal wires with special-shaped cross-sections, the metal blanks are drawn in the same process at the same time, under the same conditions of mold, drawing force, friction, drawing speed and other process parameters, the obtained Multiple metal wires with special-shaped cross-sections have very similar surface quality, shape size, organizational structure and mechanical properties, etc., and have the advantages of high production efficiency, good product quality and low production cost. However, when producing metal wires with special-shaped cross-sections by multi-head drawing, the method of drawing two or more metal blanks directly coaxially and parallelly through the drawing die is adopted. Since these metal blanks are of the same material, And they are in the same state, so the properties are almost identical to each other. Therefore, during the drawing deformation process, these metal blanks with the same deformation capacity are balanced at the interface where they are in contact with each other, so that the interface shape at the cross section It is a straight line, so the cross-sectional profile of the special-shaped cross-section metal wire obtained by drawing (except for the part where each blank is in contact with the drawing die) is a straight line, and the cross-section can be obtained as triangular, hexagonal, octagonal, Special-shaped metal wire products such as rectangle, square, trapezoid, rhombus or semicircle, etc., cannot be directly drawn to obtain complex special-shaped cross-section metal wires with curved cross-sectional profiles (such as fan-ring cross-section metal with rounded corner transitions) wire). To produce metal wires with complex special-shaped cross-sections, subsequent multi-pass single-wire drawing is required, resulting in a long process flow, more drawing dies required, low production efficiency, high production costs, and difficult product quality and performance to meet the use requirements.
因此，开发一种高效率、节能降耗、低成本生产质量和性能高且一致性和稳定性好的复杂异型截面金属线材，特别是还能满足近终形成形横截面轮廓有曲线变化的复杂异型截面金属线材要求的拉拔新方法，具有十分迫切而重要的意义。Therefore, it is necessary to develop a high-efficiency, energy-saving, low-cost production quality, high performance, and good consistency and stability of complex cross-section metal wires, especially complex metal wires with curved cross-sectional profiles that can meet the requirements of the near net shape. The new drawing method required by special-shaped cross-section metal wire has very urgent and important significance.
发明内容Contents of the invention
本发明是在传统固定拉拔模具拉拔方法的基础上，将孔型轧制中的孔型（即两个轧辊的轧槽在轧制面上所形成的孔口）概念引入并发展而提出的。采用硬度远高于金属棒线材坯料的金属线材作为硬质芯杆，多根金属棒线材坯料以单层形式同轴平行紧贴且均匀排布于硬质芯杆的表面，在传统固定拉拔模具拉拔过程中使得金属棒线材坯料和硬质芯杆同步移动，并同时从传统固定拉拔模具孔型中拉拔通过，在此过程中只有金属棒线材坯料在由拉拔模具孔型壁和硬质芯杆表面构成的闭式组合孔型中发生塑性变形，而硬质芯杆只发生弹性变形，不发生塑性变形。通过对固定拉拔模具孔型和硬质芯杆横截面形状的合理设计，使二者之间形状有机组合，实现传统固定拉拔模具和运动硬质芯杆的一体化集成，由拉拔模具孔型壁和硬质芯杆表面构成闭式组合孔型，在拉拔机构的作用下，获得所需横截面形状的异型截面金属线材。在此基础上开发一种将单线拉拔方法和多头拉拔方法合二为一的多坯料闭式组合孔型拉拔方法（又称作“多坯料带芯拉拔方法”），充分利用单线拉拔方法能够成形复杂横截面形状的异型截面金属线材，以及多头拉拔方法生产效率高、产品质量和性能及其一致性与稳定性好等优点，实现最大限度地缩短现有拉拔生产工艺流程，提高拉拔成形异型截面金属线材（特别是复杂异型截面金属线材）的质量和性能，提高成材率和生产效率，降低生产成本，节能降耗，加快拉拔方法的发展及推广应用，拓展拉拔异型截面金属线材的品种和规格以及应用范围等目的，解决目前单线拉拔方法和多头拉拔方法在生产异型截面金属线材时存在的问题。The present invention introduces and develops the concept of the pass in pass rolling (that is, the hole formed by the rolling grooves of the two rolls on the rolling surface) on the basis of the traditional drawing method of the fixed drawing die. of. The metal wire with a hardness much higher than that of the metal rod and wire blank is used as the hard core rod, and multiple metal rods and wire blanks are coaxially parallel and evenly arranged on the surface of the hard core rod in the form of a single layer. During the die drawing process, the metal rod and wire blank and the hard core rod move synchronously, and at the same time, they are drawn through the pass of the traditional fixed drawing die. Plastic deformation occurs in the closed combined pass formed by the surface of the hard core rod and the hard core rod, while the hard core rod only undergoes elastic deformation and does not undergo plastic deformation. Through the reasonable design of the pass type of the fixed drawing die and the cross-sectional shape of the hard core rod, the shapes of the two are organically combined, and the integration of the traditional fixed drawing die and the moving hard core rod is realized. The pass wall and the surface of the hard core rod form a closed combination pass, and under the action of the drawing mechanism, the special-shaped cross-section metal wire with the required cross-sectional shape is obtained. On this basis, develop a multi-blank closed combined pass drawing method (also known as "multi-blank cored drawing method") that combines the single-wire drawing method and the multi-head drawing method, making full use of the single-wire The drawing method can form special-shaped cross-section metal wires with complex cross-sectional shapes, and the multi-head drawing method has the advantages of high production efficiency, product quality and performance, and its consistency and stability, so as to minimize the existing drawing production process. process, improve the quality and performance of drawn metal wires with special-shaped cross-sections (especially metal wires with complex special-shaped cross-sections), improve the yield and production efficiency, reduce production costs, save energy and reduce consumption, accelerate the development and promotion of drawing methods, and expand The purpose of drawing the variety, specification and application range of special-shaped cross-section metal wires is to solve the problems existing in the production of special-shaped cross-section metal wires by the current single-wire drawing method and multi-head drawing method.
一种多坯料闭式组合孔型拉拔方法，其特征在于，将2根或2根以上轧尖的金属棒线材坯料以单层形式同轴平行紧贴且均匀排布在一根轧尖的硬质芯杆的表面，坯料和芯杆集束穿过拉拔模具孔型，一同被夹钳夹紧后进行拉拔，其中坯料总横截面积A0与拉拔模具孔型定径区横截面积A的比值为0<A0/A<1.5、芯杆横截面积A1与拉拔模具孔型定径区横截面积A的比值为0<A1/A<0.95，坯料在被拉过由拉拔模具孔型壁和硬质芯杆表面构成的闭式组合孔型时发生塑性变形，经过一道次拉拔后可一次得到多根横截面形状相同的异型截面金属线材。A multi-blank closed-type combined pass drawing method, characterized in that two or more sharpened metal rods and wire blanks are coaxially paralleled in a single layer and evenly arranged on a sharpened The surface of the hard core rod, the billet and the core rod are bundled through the pass of the drawing die, and are drawn together after being clamped by the clamp. The total cross-sectional area of the billet A 0 is cross-sectional The ratio of the area A is 0<A 0 /A<1.5, the ratio of the cross-sectional area A 1 of the core rod to the cross-sectional area A of the sizing area of the drawing die is 0<A 1 /A<0.95, and the blank is drawn Plastic deformation occurs when passing through the closed combined pass formed by the pass wall of the drawing die and the surface of the hard core rod. After one drawing, multiple metal wires with the same cross-sectional shape can be obtained at one time.
一种多坯料闭式组合孔型拉拔方法，其特征在于，将2根或2根以上轧尖的金属棒线材坯料集束穿过拉拔模具孔型，一同被夹钳夹紧后开始拉拔，在拉拔过程中将一根轧尖的硬质芯杆从拉拔模具孔型入口端插入金属棒线材坯料的中间，并且保证坯料以单层形式均匀排布且紧贴在芯杆表面，通过坯料与芯杆界面之间的摩擦作用将芯杆一同带入拉拔模具孔型进行拉拔，其中坯料总横截面积A0与拉拔模具孔型定径区横截面积A的比值为0<A0/A<1.5、芯杆横截面积A1与拉拔模具孔型定径区横截面积A的比值为0<A1/A<0.95，坯料在被拉过由拉拔模具孔型壁和硬质芯杆表面构成的闭式组合孔型时发生塑性变形，经过一道次拉拔后可一次得到多根横截面形状相同的异型截面金属线材。A multi-blank closed combination pass drawing method, characterized in that two or more sharpened metal rods and wire blanks are bundled through the pass of the drawing die, and the drawing is started after being clamped together by clamps , during the drawing process, a sharpened hard core rod is inserted into the middle of the metal rod and wire blank from the entrance end of the drawing die pass, and the blanks are evenly arranged in a single layer and cling to the surface of the core rod, Through the friction between the interface between the blank and the core rod , the core rod is brought together into the pass of the drawing die for drawing. 0<A 0 /A<1.5, the ratio of the cross-sectional area A 1 of the core rod to the cross-sectional area A of the sizing area of the drawing die is 0<A 1 /A<0.95, the billet is drawn by the drawing die The closed combined pass formed by the pass wall and the surface of the hard core rod undergoes plastic deformation, and after one drawing, multiple metal wires with the same cross-sectional shape can be obtained at one time.
所述金属棒线材坯料的横截面是圆形的或异型的。The cross-section of the metal rod and wire blank is circular or profiled.
所述硬质芯杆为横截面是圆形的或异型的金属线材；所述硬质芯杆的硬度远高于所述金属棒线材坯料，在拉拔过程中只发生弹性变形，不发生塑性变形；所述硬质芯杆根据拉拔需要进行放线和卷取。The hard core rod is a metal wire with a circular or special-shaped cross section; the hardness of the hard core rod is much higher than that of the metal rod and wire blank, and only elastic deformation occurs during the drawing process without plastic deformation. Deformation; the hard core rod is set out and coiled according to drawing requirements.
所述拉拔模具孔型是圆形的或异型的。The hole pattern of the drawing die is circular or profiled.
在多坯料闭式组合孔型拉拔成形结束后，根据需要可接着进行一道次变形量不超过20%的单线拉拔，成形所需尺寸精度的异型截面金属线材。并且，在多坯料闭式组合孔型拉拔成形结束后，或变形量不超过20%的单线拉拔之后，根据需要还可后续适当退火处理，获得高性能的异型截面金属线材。After the multi-blank closed combination pass drawing is completed, if necessary, a single-wire drawing with a deformation of no more than 20% can be carried out to form a special-shaped cross-section metal wire with required dimensional accuracy. Moreover, after the multi-blank closed combined pass drawing is completed, or after the single-wire drawing with the deformation amount not exceeding 20%, it can be followed by appropriate annealing treatment according to needs to obtain high-performance metal wires with special-shaped cross-sections.
本发明的主要优点在于：The main advantages of the present invention are:
1、多坯料闭式组合孔型拉拔过程中只有金属棒线材坯料的外侧与固定拉拔模具孔型壁发生接触，产生有害摩擦；而金属棒线材坯料之间却是相对静止无摩擦的；并且金属棒线材坯料与硬质芯杆之间的摩擦是有用摩擦，节约能源。1. During the multi-blank closed combination pass drawing process, only the outer side of the metal rod and wire blank is in contact with the pass wall of the fixed drawing die, resulting in harmful friction; while the metal rod and wire blanks are relatively static and frictionless; And the friction between the metal rod and wire blank and the hard core rod is effective friction, which saves energy.
2、多坯料闭式组合孔型拉拔的道次变形量大，例如一道次即可将一根横截面为圆形的金属棒线材坯料拉成横截面宽高比超过1.6的有较大凹形的异型截面金属线材；生产效率高。2. Multi-blank closed combination pass drawing has a large amount of deformation in each pass. For example, a metal rod and wire blank with a circular cross-section can be drawn into a large concave with a cross-sectional width-to-height ratio exceeding 1.6 in one pass. Shaped special-shaped cross-section metal wires; high production efficiency.
3、多坯料闭式组合孔型拉拔极大地简化了异型截面金属线材的常规拉拔成形工序，缩短了生产流程；所采用的硬质芯杆可以重复使用，寿命长；不需要采用多套截面渐变的拉拔模具，只需对现有拉拔机进行合理设计改造即可；降低了生产成本和金属消耗，可以高效拉拔成形异型截面金属线材。3. Multi-blank closed combined pass drawing greatly simplifies the conventional drawing process of special-shaped cross-section metal wires and shortens the production process; the hard core rod used can be reused and has a long life; no need to use multiple sets The drawing die with gradual cross-section only needs to be reasonably designed and modified on the existing drawing machine; the production cost and metal consumption are reduced, and metal wires with special-shaped cross-sections can be drawn and formed efficiently.
4、多坯料闭式组合孔型拉拔方法中的闭式组合孔型设计简单，加工方便，只需分别对拉拔模具孔型和硬质芯杆表面形状进行设计及加工即可，模具费用低。4. The closed combination pass in the multi-blank closed combination pass drawing method is simple in design and easy to process. It only needs to design and process the drawing die pass and the surface shape of the hard core rod separately. The mold cost Low.
5、多坯料闭式组合孔型拉拔方法不仅可以生产现有单线拉拔方法和多头拉拔方法能够生产的各种异型截面金属线材，而且还特别适用于近终形生产横截面轮廓有曲线变化的复杂异型截面金属线材。5. The multi-blank closed combined pass drawing method can not only produce various metal wires with special-shaped cross-sections that can be produced by the existing single-wire drawing method and multi-head drawing method, but also is especially suitable for near-net shape production with curved cross-sectional profiles. Variations of metal wires with complex profiled cross-sections.
6、多坯料闭式组合孔型拉拔生产的异型截面金属线材质量和性能高，一致性、均匀性和稳定性好。6. The special-shaped cross-section metal wire produced by multi-blank closed combined pass drawing has high quality and performance, and good consistency, uniformity and stability.
7、一道次多坯料闭式组合孔型拉拔与一道次单线拉拔及适当退火处理相组合的方法极大地简化了复杂异型截面金属线材的传统成形工序，缩短了生产流程，有利于获得高质量、高性能的复杂异型截面金属线材。7. The method of combining one-time multi-blank closed-type combined pass drawing with one-time single-wire drawing and proper annealing treatment greatly simplifies the traditional forming process of metal wires with complex special-shaped cross-sections, shortens the production process, and is conducive to obtaining high-quality High-quality, high-performance metal wire with complex profiled cross-sections.
附图说明Description of drawings
图1为本发明的多根金属棒线材坯料与硬质芯杆一同集束穿过拉拔模具孔型被夹钳夹紧实现多坯料闭式组合孔型拉拔的示意图。其中（1）为金属棒线材坯料；（2）为硬质芯杆；（3）为拉拔模具；（4）为拉拔模具模套；（5）为夹钳。Fig. 1 is a schematic diagram of the invention in which a plurality of metal rods and wire blanks are bundled together with a hard core rod through the pass of a drawing die and clamped by clamps to realize multi-blank closed combined pass drawing. Among them, (1) is a metal rod and wire blank; (2) is a hard core rod; (3) is a drawing die; (4) is a drawing die cover; (5) is a clamp.
图2为图1的A-A剖面图。FIG. 2 is a cross-sectional view along line A-A of FIG. 1 .
图3为本发明的硬质芯杆被多根金属棒线材坯料以摩擦方式带入拉拔模具孔型实现多坯料闭式组合孔型拉拔的示意图。其中（1）为金属棒线材坯料；（2）为硬质芯杆；（3）为拉拔模具；（4）为拉拔模具模套；（5）为夹钳。Fig. 3 is a schematic diagram of the present invention in which the hard core rod is frictionally brought into the pass of the drawing die by multiple metal rods and wire blanks to realize multi-blank closed combined pass drawing. Among them, (1) is a metal rod and wire blank; (2) is a hard core rod; (3) is a drawing die; (4) is a drawing die cover; (5) is a clamp.
图4为图1的A-A剖面图。FIG. 4 is a cross-sectional view along line A-A of FIG. 1 .
具体实施方式detailed description
以下结合实施例对本发明进行具体描述，有必要在此指出的是本实施例只用于对本发明进行进一步说明，不能理解为对本发明保护范围的限制，该领域的熟练技术人员可以根据上述本发明的内容做出一些非本质的改进和调整。The present invention is specifically described below in conjunction with the examples, it is necessary to point out that the present examples are only used to further illustrate the present invention, and can not be interpreted as limiting the protection scope of the present invention, those skilled in the art can according to the above-mentioned present invention Make some non-essential improvements and adjustments to the content.
实施例1：Example 1:
将3根轧尖的完全再结晶退火态圆形横截面铝线坯料（直径5mm）以单层形式同轴平行紧贴且均匀排布在一根直径1.8mm的轧尖的拉拔态圆形横截面高碳钢硬质芯杆的表面，坯料和芯杆集束穿过孔型是圆形的拉拔模具孔型(定径区直径8.5mm)，一同被夹钳夹紧后进行拉拔，其中坯料总横截面积A0与拉拔模具孔型定径区横截面积A的比值为1.04、芯杆横截面积A1与拉拔模具孔型定径区横截面积A的比值为0.04，坯料在被拉过由拉拔模具孔型壁和硬质芯杆表面构成的闭式组合孔型时发生塑性变形，经过一道次拉拔后可一次得到3根横截面形状相同的异型截面铝线材。后续350℃保温1h的退火处理，得到抗拉强度60-90MPa、电导率大于63%IACS的架空导线用异型截面软铝线材。Three sharpened fully recrystallized annealed circular cross-section aluminum wire billets (diameter 5mm) are coaxially parallel and evenly arranged in a single-layer form on a drawn-out round steel wire with a diameter of 1.8mm. The surface of the cross-section high-carbon steel hard core rod, the billet and the core rod bundled through the pass is a circular drawing die pass (the diameter of the sizing area is 8.5mm), and they are clamped together by the clamp before drawing. Wherein the ratio of the total cross-sectional area of the billet A 0 to the cross-sectional area A of the pass sizing area of the drawing die is 1.04, and the ratio of the cross-sectional area A 1 of the core rod to the cross-sectional area A of the pass sizing area of the drawing die is 0.04 , the blank is plastically deformed when it is pulled through the closed combined pass formed by the drawing die pass wall and the surface of the hard core rod. After one pass of drawing, three special-shaped aluminum alloys with the same cross-sectional shape can be obtained at one time. wire. Subsequent annealing treatment at 350° C. for 1 hour to obtain a special-shaped soft aluminum wire for overhead conductors with a tensile strength of 60-90 MPa and an electrical conductivity greater than 63% IACS.
实施例2：Example 2:
将4根轧尖的完全再结晶退火态圆形横截面铝线坯料（直径5mm）集束穿过孔型是圆形的拉拔模具孔型（定径区直径9.75mm），一同被夹钳夹紧后开始拉拔，在拉拔过程中将一根直径3.25mm的轧尖的拉拔态圆形横截面304不锈钢硬质芯杆从拉拔模具孔型入口端插入4根铝线坯料的中间，并且保证坯料以单层形式均匀排布且紧贴在芯杆表面，通过坯料与芯杆界面之间的摩擦作用将芯杆一同带入拉拔模具孔型进行拉拔，其中坯料总横截面积A0与拉拔模具孔型定径区横截面积A的比值为1.05、芯杆横截面积A1与拉拔模具孔型定径区横截面积A的比值为0.11，坯料在被拉过由拉拔模具孔型壁和硬质芯杆表面构成的闭式组合孔型时发生塑性变形，经过一道次拉拔后可一次得到4根横截面形状相同的异型截面铝线材。再接着进行一道次变形量为12.4%的单线拉拔，得到高尺寸精度的异型截面铝线材。后续350℃保温1h的退火处理，得到抗拉强度60-90MPa、电导率大于63%IACS的架空导线用异型截面软铝线材。4 fully recrystallized and annealed aluminum wire blanks (diameter 5mm) with a circular cross-section that are rolled and sharpened are bundled through a circular drawing die pass (diameter of the sizing area is 9.75mm), and are clamped together by the clamp Then start drawing. During the drawing process, a 304 stainless steel hard core rod with a diameter of 3.25mm and a sharpened circular cross-section is inserted into the middle of the four aluminum wire blanks from the entrance end of the drawing die pass. , and ensure that the blanks are evenly arranged in a single layer and cling to the surface of the core rod, and the core rod is brought into the drawing die pass for drawing through the friction between the blank and the core rod interface. The ratio of the area A 0 to the cross-sectional area A of the sizing area of the drawing die is 1.05, and the ratio of the cross-sectional area A 1 of the core rod to the cross-sectional area A of the sizing area of the drawing die is 0.11. Plastic deformation occurs when passing through the closed combination pass formed by the pass wall of the drawing die and the surface of the hard core rod. After one drawing, four special-shaped aluminum wires with the same cross-sectional shape can be obtained at one time. Then, a single-wire drawing with a deformation amount of 12.4% was carried out to obtain a special-shaped cross-section aluminum wire with high dimensional accuracy. Subsequent annealing treatment at 350°C for 1 hour to obtain soft aluminum wire with special-shaped cross-section for overhead conductors with a tensile strength of 60-90 MPa and an electrical conductivity greater than 63% IACS.
实施例3：Example 3:
将5根轧尖的完全再结晶退火态圆形横截面纯铜线坯料（直径5mm）以单层形式同轴平行紧贴且均匀排布在一根直径4.9mm的轧尖的拉拔态圆形横截面高碳钢硬质芯杆的表面，坯料和芯杆集束穿过孔型是圆形的拉拔模具孔型（定径区直径11.4mm），一同被夹钳夹紧后进行拉拔，其中坯料总横截面积A0与拉拔模具孔型定径区横截面积A的比值为0.96、芯杆横截面积A1与拉拔模具孔型定径区横截面积A的比值为0.18，坯料在被拉过由拉拔模具孔型壁和硬质芯杆表面构成的闭式组合孔型时发生塑性变形，经过一道次拉拔后可一次得到5根横截面形状相同的异型截面纯铜线材。Five sharpened fully recrystallized annealed circular cross-section pure copper wire blanks (5mm in diameter) are coaxially parallel and evenly arranged in a single-layer form on a drawn-out circle with a diameter of 4.9mm The surface of the high-carbon steel hard core rod with a rectangular cross-section, the billet and the core rod bundled through the pass is a circular drawing die pass (the diameter of the sizing area is 11.4mm), and they are clamped together by the clamp before drawing , wherein the ratio of the total cross-sectional area of the billet A 0 to the cross-sectional area A of the drawing die pass sizing area is 0.96, and the ratio of the core rod cross-sectional area A 1 to the cross-sectional area A of the drawing die pass sizing area is 0.18, the blank is plastically deformed when it is pulled through the closed combined pass formed by the drawing die pass wall and the surface of the hard core rod. After one drawing, five special-shaped cross-sections with the same cross-sectional shape can be obtained at one time Pure copper wire.
实施例4：Example 4:
将6根轧尖的完全再结晶退火态圆形横截面纯铝线坯料（直径5mm）以单层形式同轴平行紧贴且均匀排布在一根直径6.5mm的轧尖的拉拔态圆形横截面中碳钢硬质芯杆的表面，坯料和芯杆集束穿过孔型是圆形的拉拔模具孔型（定径区直径13mm），一同被夹钳夹紧后进行拉拔，其中坯料总横截面积A0与拉拔模具孔型定径区横截面积A的比值为0.89、芯杆横截面积A1与拉拔模具孔型定径区横截面积A的比值为0.25，坯料在被拉过由拉拔模具孔型壁和硬质芯杆表面构成的闭式组合孔型时发生塑性变形，经过一道次拉拔后可一次得到6根横截面形状相同的异型截面纯铝线材。再接着进行一道次变形量为10.6%的单线拉拔，获得高尺寸精度的异型截面纯铝线材。6 sharpened fully recrystallized annealed circular cross-section pure aluminum wire blanks (diameter 5mm) are coaxially parallel and evenly arranged in a single-layer form on a drawn-out circle with a diameter of 6.5mm The surface of the carbon steel hard core rod in the cross-section, the billet and the core rod bundled through the pass is a circular drawing die pass (the diameter of the sizing area is 13mm), and they are pulled together after being clamped by the clamp. Wherein the ratio of the total cross-sectional area of the billet A 0 to the cross-sectional area A of the pass sizing area of the drawing die is 0.89, and the ratio of the cross-sectional area A 1 of the core rod to the cross-sectional area A of the pass sizing area of the drawing die is 0.25 , the billet is plastically deformed when it is pulled through the closed combination pass formed by the drawing die pass wall and the surface of the hard core rod. After one pass of drawing, six special-shaped cross-sections with the same cross-sectional shape can be obtained at one time. Aluminum wire. Then, a single-wire drawing with a deformation amount of 10.6% is carried out to obtain a special-shaped cross-section pure aluminum wire with high dimensional accuracy.
Claims (7)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310373483.5A CN103406375B (en) | 2013-08-23 | 2013-08-23 | Multi-blank closed type combination hole pattern drawing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310373483.5A CN103406375B (en) | 2013-08-23 | 2013-08-23 | Multi-blank closed type combination hole pattern drawing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103406375A CN103406375A (en) | 2013-11-27 |
| CN103406375B true CN103406375B (en) | 2015-05-13 |
Family
ID=49599442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310373483.5A Expired - Fee Related CN103406375B (en) | 2013-08-23 | 2013-08-23 | Multi-blank closed type combination hole pattern drawing method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103406375B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115782283A (en) * | 2022-11-11 | 2023-03-14 | 宁夏永威炭业有限责任公司 | Hollow carbon electrode forming method, forming module and special mandrel for forming |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3807026A (en) * | 1971-07-07 | 1974-04-30 | Sumitomo Electric Industries | Method of manufacturing fine metallic filaments |
| JPS5788914A (en) * | 1980-11-21 | 1982-06-03 | Hitachi Cable Ltd | Method for drawing multicore superconductive wire |
| FR2584955A1 (en) * | 1985-01-08 | 1987-01-23 | Vaujours Ste Metallurg | Method for manufacturing a drawing die made from tungsten carbide, intended for drawing steel sections, of curvilinear geometry in the form of a V |
| JP2527671B2 (en) * | 1992-09-14 | 1996-08-28 | 新日本製鐵株式会社 | Hexagonal steel pipe manufacturing method |
| JPH0947810A (en) * | 1995-08-02 | 1997-02-18 | Fujikura Ltd | Method for manufacturing aluminum-coated steel composite wire |
| CN101157097A (en) * | 2007-11-23 | 2008-04-09 | 江苏亚太轻合金科技股份有限公司 | Polyhead preform continue drawing machine |
| JP2009301928A (en) * | 2008-06-16 | 2009-12-24 | Hitachi Cable Ltd | Method for manufacturing superconducting wire |
| CN202343604U (en) * | 2011-11-17 | 2012-07-25 | 蔡芳华 | Rotary die |
-
2013
- 2013-08-23 CN CN201310373483.5A patent/CN103406375B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN103406375A (en) | 2013-11-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203751013U (en) | Cold-drawing outer mold and cold-drawing mold for seamless steel tube | |
| CN102407244A (en) | A continuous extrusion mold for producing high-width-thick-ratio profiles | |
| CN103846628B (en) | A kind of cold-heading sleeve processing technique | |
| CN101518872A (en) | Method for preparing Cu-Nb monofilamentary composite wire | |
| CN101968976A (en) | Unequal wall thickness hollow wire of rotor winding and processing technology thereof | |
| CN106448799B (en) | A kind of preparation method of graphene enhancing copper niobium Multicore composite material | |
| CN203886955U (en) | Cold-drawing inner die and cold-drawing die of seamless steel pipe | |
| CN202779246U (en) | Die for extruding special-shaped copper bar of water turbine generator set | |
| CN204288931U (en) | A kind of molded line draws uses positioning module mounting | |
| CN203678888U (en) | Metal wire drawing machine | |
| CN103406375A (en) | Multi-blank closed type combination hole pattern drawing method | |
| CN202183274U (en) | Pressing and drawing die for processing round copper stranded wire of cable | |
| CN204892590U (en) | Copper alloy wire combination formula forming device | |
| CN202700994U (en) | Continuous production device for micro wire rod | |
| CN105575472B (en) | Silver-coated aluminum composite flat microfilament and preparation method thereof | |
| CN103612122B (en) | A kind of cold drawn shaping is obturaged pad manufacture method | |
| CN115945621A (en) | Die for aluminum alloy oil pipeline valve body die forging and forming method thereof | |
| CN202129290U (en) | Continuously squeezing combined type die | |
| CN104637572A (en) | Special-shaped cast alloy copper bar production process | |
| CN204700686U (en) | A kind of copper coin alligatoring device | |
| CN202258398U (en) | Compressing circular aluminum conductor | |
| CN212724955U (en) | Silicon crystal composite stereo transformer core | |
| CN208565171U (en) | A retractable aluminum rod | |
| CN221608163U (en) | A copper alloy pipe grain refinement device | |
| CN202087618U (en) | Continuous extrusion oxygen-free copper bar mold structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150513 |