共查询到19条相似文献,搜索用时 140 毫秒
1.
2.
《机械工人(冷加工)》1985,(7)
美国通用电气公司特殊材料部于1985年5月20日至21日,在成都工具研究所同我国有关技术人员就复合人造金刚石和复合立方氮化硼进行了技术座谈。该公司的人员介绍了复合人造金刚石和复合立方氮化硼刀具的制造工艺、性能和使用范围。在现场对刀头进 相似文献
3.
金刚石配比对复合基锯片切割特性的影响 总被引:2,自引:0,他引:2
通过生产试验研究了不同金刚石配比复合基圆锯片的切割特性。提出应根据花岗石种类选择金刚石浓度、强度和大小及其相对量。对三刃结构复合基刀头,最佳的金刚石分布密度NA=3.0~3.5粒/mm2,平均间距λ=1.1~1.3mm,金刚石浓度44%~48%。设计刀头时,应着重考虑通过调整金刚石配比,获得最大切屑厚度和切削力间的合理平衡。 相似文献
4.
PCD刀具在非金属材料加工中的应用 总被引:3,自引:2,他引:1
1 引言 PCD刀具泛指用人造复合聚晶金刚石片(简称PCD)制造的切削刀具.人造复合聚晶金刚石片是将聚晶金刚石微粉通过高温高压烧结压制在硬质合金基体上形成的硬质合金-金刚石复合材料.用其制作的PCD刀具既具有金刚石的高硬度、高强度同时又具有硬质合金的韧性. 相似文献
5.
三刃结构金刚石锯片的设计及切割特点 总被引:2,自引:0,他引:2
研制了三刃结构的金刚石圆锯片,其切割特点是锋利、耐磨、平稳。刀头沟槽深度为1.0~1.2mm,金刚石浓度44%~48%,采用复合基胎体。调整锯片进给速度和切深可获得高的切割效率和使用寿命。该锯片可使花岗岩的切割效率提高40%~50%,综合效益提高20%~30%。 相似文献
6.
7.
聚晶金刚石复合片(PCD)可以替代大部分天然单晶金刚石。由于金刚石聚晶是由大量无定向的单晶体聚合而成的多晶体,晶粒呈无序排列状态,相互间有很强的结合力,在刀具制造中避免了繁杂的定向操作,因此刃磨时比天然金刚石刀具方便。 相似文献
8.
9.
10.
聚晶金刚石(PCD)是人造最硬的物质,硬度高,耐磨性好,是制造石油地质钻头、电线电缆模具、切割工具等的理想材料。 聚晶金刚石在制成工具时,常与硬质合金(WC)烧结在一起制成复合材料——聚晶金刚石复合片,然后再将它切割成所需的形状,制成各种各样的工具。然而由于它硬度高、熔点高、电阻率高、耐磨性高,采用机械成形加工非常困难,采用普通的电火花线切割加工也有一定的困难。 本项切割技术是在北京市电加工研究所获国家发明二等奖、日内瓦国际新发明银奖“聚晶金刚石加工技术”的基础上,结合为美国GE公司加工φ50.8mm的紫晶金刚石复合片开始的,针对如何快速切割高质量的聚晶金刚石复合片,在机械装置和加工工艺方面作 相似文献
11.
采用正交回归试验方法,探讨锯切花岗岩参数对金刚石圆锯耐用度的主效应和交互效应,求出试验公式,并对生产实际提出出合理化建议。 相似文献
12.
13.
14.
Multi-wire sawing with a fixed diamond wire is widely used for the mass production of wafers. In this study, a novel electrolyte jet type electroplating method was devised to improve the productivity of these wires. The method is based on increasing the limiting current density (LCD) in the electroplating unit. First, an electrolyte jet type electroplating unit was designed, and the plating characteristics were investigated. To increase the LCD during plating process, the method of decreasing the depletion layer of nickel ions around the core wire was approached. The experimental results indicated that the LCD can be increased by increasing the flow rate of the electrolyte. Next, the influences of composite plating conditions on the state of abrasive distribution and density of the diamond wires were experimentally verified, and the process of selecting the optimal fabricating conditions was clarified. Lastly, the cutting performance of the prototype diamond wires was verified by slicing a polycrystalline silicon ingot. The relationship between the surface roughness of the sliced wafers and the abrasive density of the diamond wires was studied. 相似文献
15.
Friction studies on the process in circular sawing of granites 总被引:3,自引:0,他引:3
An investigation is reported of the friction characteristics of the process in circular sawing of granites with diamond segmented
sawblade. The sawing forces were measured and specific sawing energies were calculated in sawing five types of typical granite
at specific removal rates ranging from 25 to 200 mm2/s. Coupled with SEM observations of the sawn granite surfaces, a quantitative analysis for sawing energy suggests that most
of the sawing energy should be expended by friction of sliding between diamonds and granites. The effect of sliding friction
was discussed by introducing a new quantity which is called mean chip longitudinal area.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
16.
17.
18.
19.
环形电镀金刚石线锯的研制 总被引:1,自引:0,他引:1
研制了一种新型环形电镀金刚石线锯 ,介绍了锯丝基体的制备及锯丝电镀工艺。锯切试验表明该金刚石线锯具有锯切表面质量好、锯切效率高、出材率高等优良性能 ,尤其适合贵重硬脆材料以及各向异性复合材料的切割加工。 相似文献