CN1626309A - Technical method for producing pick type cutting bit - Google Patents

Technical method for producing pick type cutting bit Download PDF

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Publication number
CN1626309A
CN1626309A CN 200310114444 CN200310114444A CN1626309A CN 1626309 A CN1626309 A CN 1626309A CN 200310114444 CN200310114444 CN 200310114444 CN 200310114444 A CN200310114444 A CN 200310114444A CN 1626309 A CN1626309 A CN 1626309A
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tooth
head
carbide
method according
surface
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CN 200310114444
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CN100343011C (en
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李惠琪
孙玉宗
姬强
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泰安市科大金纳等离子科技有限公司
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Abstract

A technology for manufacturing the cutting pick includes such steps as blanking, forging, machining, ion beam smelting for covering antiwear alloy layer on its surface, quenching, low-temp tempering, refining the blind hole, installing hard alloy tip, and anticorrosion treating.

Description

一种镐型截齿的生产工艺方法 One kind of the pick process for the production of the pick

技术领域 FIELD

:本发明涉及一种螺旋滚筒采煤机镐型截齿的生产工艺方法,属于机械加工领域。 : The present invention relates to a process for producing the pick shearer A spiral pick belongs to the field of mechanical processing.

背景技术 Background technique

:目前螺旋滚筒式采煤机普遍采用镐型截齿作为采煤刀具。 : Currently spiral shearer commonly used as the pick mining pick tool. 根据MT246-1996煤矿截齿标准,截齿的齿体材料推荐选用35CrMnSiA,42CrMo等优质合金结构钢。 The standard MT246-1996 coal picks, tooth material pick recommended use 35CrMnSiA, 42CrMo alloy and steel and the like. 镐型截齿由齿体和柱状硬质合金齿尖所组成,柱状硬质合金齿尖用硬钎焊(如铜焊或银焊)的方法镶焊在齿体头部顶端的盲孔内。 The pick and the pick by the teeth columnar body composed of a cemented carbide tooth tip, the tooth tips of columnar cemented carbide by brazing (silver brazing or welding, such as) a method inserts welded to the top blind bore in the head of the tooth body. 现在普遍采用以下工序进行生产:①齿体下料→②锻造→③机械加工→④钎焊硬质合金齿尖→⑤截齿整体调质热处理或盐浴等温淬火→⑥表面防腐处理。 Is now widely used for the following production steps: ① → ② cutting tooth body forged surface temperature quenching → ⑥ → ③ → ④ machining brazed carbide prongs → ⑤ pick overall quality heat treatment or other anti-corrosion treatment bath. 截齿整体调质热处理或盐浴等温淬火是提高齿体强韧性与齿体头部表面耐磨性能的必要步骤。 Other pick overall quality heat treatment or austempering salt bath is a necessary step to improve the strength and toughness of the head body gear tooth surface wear resistance thereof. 但是调质热处理(即淬火加高温回火)及盐浴等温淬火过程中的加热和冷却,会在钎焊缝及硬质合金中产生显微裂纹,损害截齿使用寿命。 However, transfer of heat treatment (i.e., quenching and tempering) and austempering salt bath during heating and cooling, microcracks occur in the cemented carbide and brazed seam damage pick life. 钎焊过程对齿体头部的剧烈加热,也会引发硬质合金内部裂纹增生,并导致齿体头部产生过热组织。 Heating the brazing process to severe tooth element head, internal cracks will lead to the proliferation of cemented carbide and lead to overheating of the head body of the tooth tissue. 另外,截齿整体调质热处理或等温淬火对提高包覆硬质合金的齿体头部表面的耐磨性十分有限,因此在使用过程中齿体头部表面早期磨损,使硬质合金过早暴露出来并脱落,导致了截齿的急剧磨损破坏。 Further, the pick overall quality heat treatment or austempering very limited wear resistance of the tooth surface of the head body to improve the coating the cemented carbide, the head surface of the tooth body so early in the course of wear, premature cemented carbide exposed and off, leading to a sharp pick wear damage. 因此,围绕硬质合金周边齿体头部表面的耐磨性问题,人们开展了大量的工作,申报的相关专利如下所述。 Thus, wear around the peripheral surface of the head tooth problems carbide body, there have been a lot of work, the following patents declared.

申请号为89101285.0的专利“高硬耐磨涂层截齿及工艺”中,论述了在齿体头部喷焊一层高硬度耐磨合金的方法。 Patent Application No. 89101285.0 "high wear resistant hard coating process and pick", the method discussed in the body of the tooth head spray a layer of high hardness of the wear-resistant alloy. 该方法对表面前处理要求严格,而且在喷焊时不能对齿头进行冷却,否则潮湿的表面严重影响涂层结合力,喷焊时合金粉末散失严重成本高,喷焊层与基体主要是机械嵌合,难以承受高冲击负荷。 The method for treating the surface of the front strict requirements, but can not be cooled at the tooth head spray, or seriously affected the wet surface adhesion coating, spray alloy powder is lost when the high cost of serious, spray layer and the substrate mainly mechanical chimeric, bear high impact loads. 申请号为98110589.0的专利“采煤机用截齿及工艺”中,论述了在齿体表面渗碳、碳氮共渗或喷镀提高齿体耐磨性的方法。 Patent Application No. 98110589.0 of the "pick and Shearer process" in discusses the tooth element carburizing, carbonitriding or the wear resistance of the teeth to improve the spraying body. 申请号为98243585.1的专利“采煤机用镐型截齿”中,论述了利用上述专利方法生产的一种镐型截齿。 Patent Application No. 98243585.1 of "shearer with a tooth-pick" in the pick discusses a pick produced by the above patented process. 该方法中喷镀缺陷如前面所述的喷焊,而渗碳或碳氮共渗加热时的高温会丧失掉齿体调质的强韧化效果,钎焊加热又会丧失掉齿头渗碳或碳氮共渗的硬化效果,如果最终为渗碳或碳氮共渗,则又削弱了钎焊缝与硬质合金的强度。 The spraying process defects as previously described spray, and high temperature carburizing or carbonitriding heat gets lost tooth element will temper the toughening effect, brazing heating will gets lost tooth head carburizing or carbonitriding hardening effect, if the final carburizing or carbonitriding is, in turn weakens the braze seam and carbide.

综上所述,目前尚未有一种既保持齿体、钎焊缝、硬质合金齿尖的强韧性,又能大幅度提高硬质合金齿尖周边齿头表面耐磨性的简便可靠的生产方法。 In summary, there is a not yet while maintaining the tooth body, the brazing weld toughness carbide tooth tip, the tooth head can greatly improve the wear resistance of a cemented carbide surface of the peripheral prongs simple and reliable production methods .

发明内容 SUMMARY

:本发明的目的,在于提供一种即保持截齿齿体、钎焊缝、硬质合金齿尖的强韧性,又能大幅度提高硬质合金齿尖周边齿体头部表面硬度和抗冲击磨损性能的高效率低成本镐形截齿生产方法。 : Object of the present invention, i.e. to provide a tooth pick holder body, a brazing weld toughness carbide tooth tip, the tooth tip can greatly improve the carbide tooth member surrounding the head surface hardness and impact wear properties cost efficient conical bits production process.

本发明的生产工序如下:①齿体下料→②锻造→③机械加工→④齿头表面离子束熔覆耐磨合金防护层→⑤齿体热处理→⑥精修盲孔→⑦冷装硬质合金齿尖→⑧表面防腐处理。 Production process of the present invention is as follows: ① → ⑥ heat finishing cutting tooth element blind bore forging → ② → ③ → ④ machining the tooth surfaces of the ion beam head protective layer resistant alloy cladding → ⑤ → ⑦ tooth element mounted cold hard → ⑧ alloy tooth tip surface corrosion treatment.

本发明各工序的具体实施工艺方法是:①齿体下料:选用20CrMnTi、20CrMnMo等低碳低合金结构钢棒为原料,下料体积按照截齿毛坯体积计算;②锻造:始锻温度为1200℃,终锻温度为≥800℃,热锻出齿体毛坯;③机械加工:在车床上按照图纸要求切削出齿体外形;④齿头表面离子束熔覆耐磨合金防护层:采用压缩电弧等离子束熔覆机床,把截齿夹持在旋转装置上,工作时齿头呈水平状态旋转,用压缩电弧等离子束从齿头上表面加热熔化,在瞬间依次形成的齿头表面熔池内,注入由Cr、Ni、W、Mo、V、Ti、C、B、Si以及WC、TiC等成分组成的混合粉末,粉末熔化后与基体熔合并凝固,形成硬面冶金涂层,同时在齿头底部设冷却装置对齿头进行冷却;⑤齿体热处理:淬火加低温回火,淬火温度为880℃,碱液淬火,回火温度为200℃,以获得低碳板条状马氏体组织,等 Specific embodiments of the process for each step of the present invention are: ① cutting tooth element: the choice 20CrMnTi, 20CrMnMo other low-carbon low-alloy structural steel bars as a raw material, calculated according to the volume of cutting picks blank volume; ② Forging: initial forging temperature of 1200 ℃, final forging temperature is ≥800 ℃, the hot forged gear blank body; ③ machined: a lathe cutting teeth in accordance with the outer shape of drawings; ④ ion beam tooth tip surface protective layer of wear-resistant alloy cladding: a compressed arc plasma beam cladding machine, the pick holder in the rotational device, when the working tooth rotary head in a horizontal state, the plasma beam compression arc heating and melting the head from the tooth surface, the first surface of the bath in the inner teeth sequentially formed instantaneously injected the components Cr, Ni, W, Mo, V, Ti, C, B, Si and WC, TiC and other components of the mixed powder, the powder melted and fused and solidified matrix formed hardface metallurgy, while at the bottom of the tooth head The cooling device is provided for cooling the tooth head; tooth element ⑤ heat treatment: quenching and tempering, quenching temperature of 880 deg.] C, lye quenching and tempering temperatures of 200 ℃, to obtain a low carbon lath martensite, etc. 子束熔覆合金层不受影响;⑥精修盲孔:在镗床或车床上精修齿体头部顶端的盲孔至过盈装配尺寸;⑦冷装硬质合金齿尖:在压力机上把柱状硬质合金齿尖压入齿体头部的盲孔内;⑧表面防腐处理:对截齿检查后进行涂油防锈包装。 Beamlet cladding alloy layer is not affected; Refinement blind hole ⑥: in a blind hole boring or lathe finishing tooth tip interference fit to the head body size; ⑦ cold loaded carbide prongs of: in press columnar carbide tooth tip is pressed into the head of the blind bore tooth element; ⑧ surface corrosion treatment: after checking the pick oiling rust-proof packaging.

本发明的技术特点是:与传统的生产工序相比,在第④道工序中采用了等离子束流熔覆合金或金属陶瓷涂层技术。 Technical features of the invention are: compared with conventional production processes, the use of the plasma beam cladding alloy or cermet coating technology described in step ④ track. 其技术原理是:在压缩电弧等离子束流扫描下,金属零件表面依次高速熔化形成熔池,同步向熔池中定量送入合金或金属陶瓷粉末,合金或金属陶瓷粉末与熔池一起混合、扩散、反应、凝固,形成所需厚度的呈冶金结合的高抗冲击耐磨保护层。 The technical principle is: in a compressed arc plasma beam scanning, a high speed to melt the metal parts of the surface sequentially forming a molten pool, is clocked into the alloy or cermet powders, metal alloy or ceramic powders into the bath with the bath quantitatively mixed together, diffusion , the reaction solidified, high impact wear protection is formed as a metallurgically bonded layer of desired thickness. 由于熔覆同时有冷却装置冷却齿头和齿尖,因此截齿整体仍处于室温状态下;另外,将原钎焊硬质合金齿尖改为冷装硬质合金齿尖,并把原来的截齿整体调质热处理改为只对截齿齿体热处理,这样即消除了钎焊对齿体和硬质合金的损害,也消除了整体热处理对钎焊缝和硬质合金的损害,同时解决了包覆硬质合金的齿头表面耐磨性问题。 Since the cladding while cooling device for cooling the tooth head and a tooth tip, so overall pick still under room temperature; In addition, the original tooth tip brazed carbide carbide prongs mounted to the cold, and the original cut thermal refining whole tooth to tooth picks only subjected to heat treatment, i.e., so to eliminate damage to the tooth brazing cemented carbide body and also eliminates damage to the overall heat treatment of the cemented carbide and brazed seam, while addressing the coating the tooth surface wear problems carbide head.

本发明的积极效果是:1、由于采用了低碳低合金结构钢作为齿体材料,比传统应用的中碳超高强度合金钢锻造温度区间宽,不易锻裂,提高了锻造效率和成品率;2、由于对齿体单独进行热处理,不会对硬质合金质量产生影响,且获得的低碳板条状马氏体具备高强度和高韧性,有效发挥了低碳低合金结构钢的性能潜力,节约了成本;3、所采用的等离子束熔覆技术,可获得厚度、成分组织与性能均匀一致的合金硬化层,与熔覆层底部的低碳马氏体硬化层一起,提高了对硬质合金的包覆支撑力,大幅度提高了齿头表面的耐磨性,有效地保护了硬质合金,也进一步提高了齿头的抗弯强度;4、由于以冷装代替钎焊,消除了钎焊料和钎焊缝,提高了工效,降低了成本,消除了钎焊热影响。 The positive effect of the invention is: 1, the use of low-carbon low-alloy steel material as the tooth, than the conventional ultra high strength carbon steel applications forging temperature range width, forging crack easily, improving the efficiency and yield of forging ; 2, since the body heat of the teeth alone, does not affect the quality of the cemented carbide, and obtain a low carbon lath martensite with high strength and high toughness, effectively play the performance of the low-carbon low-alloy steel potential cost savings; with 3, and the like used low carbon martensitic hardened ion beam cladding layer, the thickness can be obtained, and uniform composition organization properties of the alloy hardened layer, and a bottom cladding layer, to improve the coated carbide supporting force greatly improve the wear resistance of the tooth surface of the head, effectively protect the cemented carbide, but also further improve the bending strength of the tooth head; 4, since the cooling means instead of soldering, It eliminates solder and brazing weld, improve efficiency, reduce cost, eliminate the thermal influence brazing. 因此齿体、硬质合金齿尖都保持了最佳性能状态,大幅度提高了截齿的使用寿命,生产成本低,效率高,能够批量稳定生产。 Thus the tooth body, the carbide tooth tip remains the best performance state to significantly improve the pick life, low cost, high efficiency, capable of stable production batch.

为了证明本发明的效果,把用该方法试验生产的镐型截齿安装到1.6米直径双螺旋滚筒采煤机的其中一个滚筒上(共36把),把按照传统工艺生产的截齿安装到另外一个滚筒上,在同等条件下进行对比采煤试验。 To demonstrate the effect of the present invention, the pick of the pick with the test method of producing a roller which is mounted to the double helix diameter of 1.6 meters shearer drum (36 total), according to the traditional technology, picks mounted Further on a drum were compared under the same test conditions mining. 试验结果表明,经等离子束熔覆耐磨强化的截齿使用寿命提高了4倍。 The results showed that the plasma beam via the reinforcing cladding wear life picks increased four times.

Claims (6)

1.一种镐型截齿的生产工艺方法,它按以下工序进行:①齿体下料→②锻造→③机械加工→其特征还包括④齿头表面离子束熔覆耐磨合金防护层→⑤齿体热处理→⑥精修盲孔→⑦冷装硬质合金齿尖→⑧表面防腐处理。 A type of pick-ho method of production technology, it is performed in the following steps: ① → ② cutting tooth body forging machining → ③ → ④ characterized by further comprising ion beam tooth tip surface protective layer of wear-resistant alloy cladding → intensive heat treatment → ⑥ blind bore ⑤ → ⑦ cold tooth element mounted → ⑧ carbide tooth tip surface corrosion treatment.
2.如权利要求1所述的方法,其特征在于,采用低碳低合金结构钢作为截齿齿体毛坯材料。 2. The method according to claim 1, wherein the low carbon low alloy steel material as the truncated teeth of blank material.
3.如权利要求1所述的方法,其特征在于齿体毛坯的始锻温度为1200℃,终锻温度为800℃。 The method according to claim 1, characterized in that the tooth element blank initial forging temperature of 1200 deg.] C, the final forging temperature of 800 ℃.
4.如权利要求1所述的方法,其特征在于,齿体头部表面等离子束熔覆高合金防护层的方法是:采用压缩电弧等离子束熔覆机床使截齿夹持在旋转装置上,熔覆时齿头呈水平状态旋转,压缩电弧等离子束从齿头上表面加热熔化,在瞬间依次形成的熔池内,注入由Cr、Ni、W、Mo、V、Ti、C、B、Si以及WC、TiC等成分组成的混合粉末,粉末熔化后与基体熔合并凝固,形成硬面冶金涂层,同时,在齿头底部设冷却装置对齿头表面进行冷却。 4. The method according to claim 1, characterized in that the tooth element method head surface plasma beam of high-alloy cladding of the protective layer is: a compressed arc plasma beam cladding machine so that the rotary cutting bit holding means, when the cladding tooth head rotating in a horizontal state, compression arc plasma beam head from the tooth surface heated and melted instantaneously in the bath formed sequentially, injected from Cr, Ni, W, Mo, V, Ti, C, B, Si, and the mixed powder WC, TiC and other ingredients, the powder melted and fused with the substrate is coagulated to form hardface metallurgy, while provided in the bottom of the tooth head cooling means for cooling the surface of the tooth head.
5.如权利要求1所述的方法,其特征在于,冷装硬质合金齿尖时先在镗床或车床上精修盲孔,再在压力机上把柱状硬质合金齿尖压入盲孔内,即硬质合金齿尖采用过盈配合冷装的方法。 5. The method according to claim 1, wherein, in the first finishing lathe or boring a blind hole, in the press and then the columnar carbide is pressed into the blind bore prongs cold loaded carbide prongs , i.e., a method through the use of carbide tooth tip interference fit cold package.
6.如权利要求1所述的方法,其特征还在于齿体热处理时的淬火温度为880℃,碱液淬火,回火温度为200℃。 6. The method according to claim 1, further characterized in that the quenching temperature heat treatment at 880 deg.] C tooth element, lye quenching and tempering temperatures of 200 ℃.
CNB200310114444XA 2003-12-09 2003-12-09 Technical method for producing pick type cutting bit CN100343011C (en)

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CN102744342A (en) * 2012-06-11 2012-10-24 盐城理研精密锻造有限公司 Method for forging cutting-tooth forge piece
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CN103866222A (en) * 2014-03-06 2014-06-18 西安交通大学 Coating material and cutting tooth body with coating layer of coal cutter and preparation method of coating layer
CN103898501A (en) * 2014-04-01 2014-07-02 安庆市灵宝机械有限责任公司 Cutting tooth plasma beam surface metallurgy process
CN103909190A (en) * 2014-03-24 2014-07-09 大丰市中德精锻件有限公司 Cold extrusion forming process of ribbed pick forgings
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CN104451352A (en) * 2014-12-26 2015-03-25 沈阳工业大学 Process for novel preparing cutting tooth of coal cutter
CN106593439A (en) * 2016-11-30 2017-04-26 安徽省皖江机电设备制造有限公司 High-abrasion-resistance and high-impact-resistance mining cutting teeth and machining method thereof

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CN101920442B (en) 2010-06-20 2011-12-07 大丰市中德精锻件有限公司 Process for coldly extruding, reducing and pressing bit body and hard alloy head
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CN103866222B (en) * 2014-03-06 2016-04-27 西安交通大学 A kind of coating material, with the coal winning machine cutting bit denticle of coat and preparation method
CN103866222A (en) * 2014-03-06 2014-06-18 西安交通大学 Coating material and cutting tooth body with coating layer of coal cutter and preparation method of coating layer
CN103909190A (en) * 2014-03-24 2014-07-09 大丰市中德精锻件有限公司 Cold extrusion forming process of ribbed pick forgings
CN103898501A (en) * 2014-04-01 2014-07-02 安庆市灵宝机械有限责任公司 Cutting tooth plasma beam surface metallurgy process
CN104148885A (en) * 2014-06-16 2014-11-19 黄河科技学院 Polycrystalline diamond pick-rod machining process
CN104148885B (en) * 2014-06-16 2016-07-20 黄河科技学院 Polycrystalline diamond pick rod processing technique
CN104451352A (en) * 2014-12-26 2015-03-25 沈阳工业大学 Process for novel preparing cutting tooth of coal cutter
CN106593439A (en) * 2016-11-30 2017-04-26 安徽省皖江机电设备制造有限公司 High-abrasion-resistance and high-impact-resistance mining cutting teeth and machining method thereof

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