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Metal-ceramic composite pick with continuous gradient structure for mine roadheader and manufacturing method

A metal-ceramic composite, gradient structure technology, applied in cutting machinery, earthwork drilling, coating, etc., can solve the problems of high production cost of picks, welding stress concentration, etc., to save manufacturing costs, solve thermal stress concentration, The effect of avoiding welding structural defects

Active Publication Date: 2019-07-16
JIAMUSI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In order to solve the problem of welding stress concentration between the pick head and the pick shank of the existing roadheader pick and the problem of high production cost of the uniformly manufactured pick, the present invention proposes a continuous gradient for mine roadheader. Structural metal-ceramic composite pick and manufacturing method

Method used

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  • Metal-ceramic composite pick with continuous gradient structure for mine roadheader and manufacturing method
  • Metal-ceramic composite pick with continuous gradient structure for mine roadheader and manufacturing method

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specific Embodiment approach 1

[0033] 矿山掘进机用连续梯度结构的金属陶瓷复合截齿,截齿的主体为三维连续梯度网络开孔结构的陶瓷骨架;三维连续梯度网络开孔结构的陶瓷骨架材料包括陶瓷粉体和烧结助剂,陶瓷粉体为碳化硼、碳化硅、硼化钛、氧化铝的一种或多种,烧结助剂为稀土类氧化物、氧化铝、氧化硅的多种;截齿的三维连续梯度网络开孔结构的陶瓷骨架从截齿齿头开始依次为齿头骨架1、齿中骨架2和齿尾骨架3;齿头骨架1、齿中骨架2和齿尾骨架3为连续的整体结构,且齿头骨架1的骨架孔径小于齿中骨架2的骨架孔径小于齿尾骨架3的骨架孔径;截齿的三维连续梯度网络开孔结构的陶瓷骨架上涂覆有过渡层;在涂覆过渡层的三维连续梯度网络开孔结构的陶瓷骨架表面涂覆有涂层材料,或者在三维连续梯度网络开孔结构的陶瓷骨架的孔径之间浇铸有涂层材料,涂层材料为碳化钨、碳化钛、氧化锆、钴合金、镍合金、铬粉的一种或多种。

[0034]Compared with the prior art, the pick of the present invention can realize the integrated design and manufacture under the continuous gradient structure, which can fully guarantee the needs of high strength and high hardness, and the continuous gradient structure can be compared with the uniform structure section under its own manufacturing process conditions. The tooth saves more than 5% of the manufacturing cost. Although the present invention is a continuous gradient structure, it can fully realize the integrated design in the structure, and at the same time, it can design and manufacture the ceramic...

specific Embodiment approach 2

[0040] A method for manufacturing a metal-ceramic composite pick with a continuous gradient structure for a mine roadheader, comprising the following steps:

[0041] Step 1, the manufacture of the ceramic skeleton of the three-dimensional continuous gradient network opening structure:

[0042] Step 1.1, manufacture the polyurethane foam material formwork according to the shape and structure of the tooth pick, the pore diameter of the first part of the tooth head skeleton corresponding to the polyurethane foam material formwork is smaller than the pore diameter of the second part of the middle skeleton of the tooth and smaller than the skeleton aperture of the third part of the tooth tail skeleton, And the polyurethane foam material template is a continuous overall structure; according to the force analysis and use of different parts of the pick in the experiment, the pore size gradient is pre-calculated according to the experiment and computer simulation; and then made into pol...

specific Embodiment approach 3

[0050] The materials used to prepare the ceramic skeleton with a three-dimensional continuous gradient network open-pore structure described in step 1.2 of this embodiment include ceramic powder and sintering aids, and the ceramic powder is one of boron carbide, silicon carbide, titanium boride, and alumina or more, and the sintering aid is a variety of rare earth oxides, aluminum oxide, and silicon oxide. Using boron carbide, silicon carbide, titanium boride and other ceramic powders to make a ceramic skeleton with a three-dimensional continuous gradient network opening structure has the advantages of high hardness and wear resistance of ceramic materials. The sintering aid can be determined according to the selected ceramic powder, so that the overall three-dimensional continuous gradient network open-pore structure of the ceramic skeleton has sufficient strength and hardness. This selection process can be determined through experiments, so that the material components and p...

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Abstract

The invention discloses a metal / ceramic composite pick with a continuous gradient structure for a mine roadheader and a manufacturing method thereof, and relates to the field of mining equipment manufacturing, in particular to a pick for a mine roadheader and a manufacturing method thereof. The invention aims to solve the problem of welding stress concentration between the pick head and the pick shank of the prior roadheader pick and the problem of high production cost of the uniformly manufactured pick. The main body of the tooth pick of the present invention is a ceramic skeleton with a three-dimensional continuous gradient network opening structure. The ceramic skeleton is the tooth head skeleton, the tooth middle skeleton and the tooth tail skeleton from the tooth head of the pick, and the tooth head skeleton, the tooth middle skeleton and the tooth tail. The skeleton is a continuous overall structure, and the aperture of the tooth head skeleton is smaller than that of the tooth middle skeleton and the tooth tail skeleton; the ceramic skeleton is coated with a transition layer; the surface of the ceramic skeleton coated with the transition layer is coated with a wear-resistant material , or a wear-resistant material is cast between the apertures of the ceramic skeleton of the three-dimensional continuous gradient network opening structure. The design and manufacture of the pick of the present invention.

Description

technical field [0001] 本发明涉及采矿设备制造领域,尤其涉及一种矿山掘进机用截齿及其制造方法。 Background technique [0002] 在现有技术中掘进机的采掘截齿是目前大型采掘机上的关键部件,随着煤矿、采石场、地下铁路、开山隧道等需求的不断增长,大型掘进机的应用越来越广泛。因此,开发高性能的新型采掘截齿成为当前亟待解决的重要研究课题。普遍的采掘截齿多采用截齿柄和截齿头两部分的组合结构设计,截齿头焊接于截齿柄的一端。目前所采用的截齿柄的耐磨性能较差,优先于截齿头过早地损坏,进而导致整个截齿的断裂失效,由此造成的问题包括:(1)由于截齿的整体失效而导致的使用寿命过短,必须要频繁地更换截齿部件,更换过程中必须停机操作,直接结果就是设备的利用率过低,不能充分发挥设备的利用效率;(2)作为关键部件,即便有少数的截齿失效,仍需要停机更换。过多的失效截齿必然导致其设备维护成本明显增加。 [0003] 即使对截齿柄的耐磨性能进行强化处理,但由于焊接技术自身的缺陷而导致的材料在焊接过程中产生的应力集中以及后期的热处理过程均有可能造成截齿的结构损伤,造成截齿的整体性能下降。 [0004] 掘进机是矿山、冶金、公路、隧道等行业应用较为普遍的一种装备,截齿是掘进机中最为关键的一种组合式耐磨损设备零件。目前国内使用的截齿材料通常为金属陶瓷颗粒或金刚石,其中金属主要是高铬钢,高锰钢等材料,通过在金属融液中引入不同类型的添加元素如Cr、Co、Ti、V等来提高其耐磨性能。采用高铬钢作为截齿时,其耐磨性好,但耐冲击性差,实用过程中容易断裂;而采用改进的高锰钢作为截齿时,在使用过程中具有较好的韧性,但其耐磨性较差,使用过程中需要经常更换。 [0005] 截齿头引入耐磨损的金刚石涂层或陶瓷颗粒,金刚石涂层本身就存在制造成本昂贵的问题,截齿材料制造过程中引入一定含量的陶瓷颗粒,也能适当提高截齿材料的实用寿命,然而,不可避免的问题是由于陶瓷颗粒与金属基体之间存在应力失配问题,导致陶瓷颗粒从金属基体上脱落。从而引起截齿失效。 [0006] 现有的截齿除截齿头以外一般都是均一结构,这样还存在着过多使用制造材料导致的生产成本较高。 Contents of the invention [0007] 本发明为解决现有掘进机...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21C35/183C04B35/10C04B35/563C04B35/565C04B35/58C04B35/64C04B41/51C09D1/00
Inventor 张云龙宋春梅李成海周嵬张瑞霞魏绪树
Owner JIAMUSI UNIVERSITY
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