CN107952969B - A kind of hard alloy valve base lathe tool and its application - Google Patents
A kind of hard alloy valve base lathe tool and its application Download PDFInfo
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- CN107952969B CN107952969B CN201711226043.1A CN201711226043A CN107952969B CN 107952969 B CN107952969 B CN 107952969B CN 201711226043 A CN201711226043 A CN 201711226043A CN 107952969 B CN107952969 B CN 107952969B
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- 239000000956 alloy Substances 0.000 title claims abstract description 33
- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 32
- 238000005520 cutting process Methods 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 18
- 239000007787 solid Substances 0.000 claims abstract description 16
- 239000010935 stainless steel Substances 0.000 claims abstract description 15
- 229910001220 stainless steel Inorganic materials 0.000 claims abstract description 15
- 238000000034 method Methods 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 17
- 238000000576 coating method Methods 0.000 claims description 17
- 229910000601 superalloy Inorganic materials 0.000 claims description 13
- 238000005452 bending Methods 0.000 claims description 3
- 229910017052 cobalt Inorganic materials 0.000 claims description 3
- 239000010941 cobalt Substances 0.000 claims description 3
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims description 3
- 229910000997 High-speed steel Inorganic materials 0.000 description 11
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 229910052759 nickel Inorganic materials 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
- B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
- B23B27/141—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness
- B23B27/145—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness characterised by having a special shape
- B23B27/146—Means to improve the adhesion between the substrate and the coating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Auxiliary Devices For Machine Tools (AREA)
- Turning (AREA)
Abstract
本发明提供一种硬质合金活门座车刀，其所述的硬质合金活门座车刀材料采用精细粒度硬质合金，晶粒度≤0.5μm；所述的硬质合金活门座车刀采用整体硬质合金；刀柄有上、下两平面，便于装夹；前角刃口与刀柄平面平行，保证刀具装夹后，刀具的切削位置正确；所述的硬质合金活门座车刀加工不锈钢活门座时，车刀的切削速度为680～720转/分，线速度14.5～20.5米/分，进给速度0.035～0.045mm/转；所述的硬质合金活门座车刀加工高温合金活门座时，车刀的切削速度为280～320转/分，线速度6.8～8.0米/分，进给速度0.025～0.035mm/转。本发明所述的硬质合金活门座车刀具有硬度高、耐磨性好、加工效率高、使用寿命长等优点。
The invention provides a turning tool for a cemented carbide valve seat, wherein the material of the hard alloy valve seat turning tool is fine-grained cemented carbide, and the grain size is ≤0.5 μm; the hard alloy valve seat turning tool is made of Solid carbide; the tool handle has upper and lower planes for easy clamping; the rake edge is parallel to the plane of the tool handle to ensure that the cutting position of the tool is correct after the tool is clamped; the above-mentioned carbide valve seat turning tool When processing the stainless steel valve seat, the cutting speed of the turning tool is 680-720 rpm, the linear speed is 14.5-20.5 m/min, and the feed speed is 0.035-0.045mm/rev; When the alloy valve seat is used, the cutting speed of the turning tool is 280-320 rpm, the linear speed is 6.8-8.0 m/min, and the feed speed is 0.025-0.035 mm/rev. The cemented carbide valve seat turning tool of the invention has the advantages of high hardness, good wear resistance, high processing efficiency, long service life and the like.
Description
技术领域technical field
本发明涉及一种硬质合金刀具的加工，具体涉及一种航天发动机阀门的 硬质合金活门座车刀及其应用。The present invention relates to the processing of a kind of cemented carbide cutting tool, in particular to a kind of cemented carbide valve seat turning tool of aerospace engine valve and its application.
背景技术Background technique
在航天发动机的制造中，大部分材料均属难加工材料。难加工材料的切 削加工问题一直是金属切削界重点研究内容。高速钢刀具具有十分出色的强 度和韧性，抗震性能高；但是红硬性(在切削高温下保持硬度的能力)较低， 切削温度不能太高。阀门是航天发动机上的极为重要的批量产品，而活门座 是阀门的关键密封结构件，其加工质量对产品密封性能至关重要。目前，航 天发动机活门座材料包括铝、不锈钢、钛合金、高温合金等。In the manufacture of aerospace engines, most materials are difficult to process. Machining of difficult-to-machine materials has always been a key research topic in the metal cutting field. High-speed steel cutting tools have excellent strength and toughness, and high shock resistance; but the red hardness (the ability to maintain hardness at high cutting temperatures) is low, and the cutting temperature should not be too high. The valve is an extremely important batch product on the aerospace engine, and the valve seat is the key sealing structure of the valve, and its processing quality is crucial to the sealing performance of the product. At present, the valve seat materials of aerospace engines include aluminum, stainless steel, titanium alloys, superalloys, etc.
但是由于加工刀具的限制(目前采用高速钢刀具)，活门座的加工效率 较低，加工出活门的光洁度和型面不理想，尤其是低温阀门的活门座还需经 过研磨交付，影响产品可靠性。以高温合金终点的镍基高温合金为例：镍基 高温合金在切削加工时刀具磨损严重，切削温度高，加工硬化严重，生产效 率低，大部分的高速钢刀具几乎无法加工镍基高温合金。However, due to the limitation of processing tools (high-speed steel tools are currently used), the processing efficiency of the valve seat is low, and the smoothness and profile of the processed valve are not ideal, especially the valve seat of the cryogenic valve needs to be ground and delivered, which affects product reliability. . Take the nickel-based superalloy at the end of the superalloy as an example: the tool wear of the nickel-based superalloy is severe during cutting, the cutting temperature is high, the work hardening is serious, and the production efficiency is low. Most high-speed steel tools can hardly process the nickel-based superalloy.
发明内容Contents of the invention
本发明的目的在于提供一种硬质合金活门座车刀及其应用，其能替代高 速钢活门座车刀，加工发动机中的不锈钢、钛合金材料和高温合金活门座密 封型面。The object of the present invention is to provide a kind of cemented carbide valve seat turning tool and application thereof, which can replace the high speed steel valve seat turning tool, and process stainless steel, titanium alloy material and superalloy valve seat sealing profile in the engine.
实现本发明目的的技术方案：The technical scheme that realizes the object of the present invention:
本发明所述的一种硬质合金活门座车刀，其所述的硬质合金活门座车刀 材料采用精细粒度硬质合金，晶粒度≤0.5μm；所述的硬质合金活门座车刀 采用整体硬质合金；刀柄有上、下两平面，便于装夹；前角刃口与刀柄平面 平行，保证刀具装夹后，刀具的切削位置正确；车刀前角5～7°，车刀后角 沿型面10～12°。A kind of cemented carbide valve seat turning tool according to the present invention, the hard alloy valve seat turning tool material adopts fine-grained cemented carbide, and the grain size is ≤0.5 μm; the cemented carbide valve seat turning tool The tool is made of solid carbide; the tool handle has two planes, upper and lower, for easy clamping; the rake edge is parallel to the plane of the tool handle to ensure that the cutting position of the tool is correct after the tool is clamped; the rake angle of the turning tool is 5-7° , The rear angle of the turning tool is 10-12° along the profile.
本发明所述的一种硬质合金活门座车刀的应用，其所述的硬质合金活门 座车刀材料采用精细粒度硬质合金，晶粒度≤0.5μm；所述的硬质合金活门 座车刀采用整体硬质合金；刀柄有上、下两平面，便于装夹；前角刃口与刀 柄平面平行，保证刀具装夹后，刀具的切削位置正确；车刀前角5～7°，车 刀后角沿型面10～12°；所述的硬质合金活门座车刀加工不锈钢活门座时， 车刀的切削速度为680～720转/分，线速度14.5～20.5米/分，进给速度 0.035～0.045mm/转；所述的硬质合金活门座车刀加工高温合金活门座时，车 刀的切削速度为280～320转/分，线速度6.8～8.0米/分，进给速度 0.025～0.035mm/转。The application of a kind of cemented carbide valve seat turning tool according to the present invention, the material of the cemented carbide valve seat turning tool adopts fine-grained cemented carbide, and the grain size is ≤0.5 μm; the described cemented carbide valve The seat turning tool is made of solid carbide; the tool handle has two planes, upper and lower, for easy clamping; the rake edge is parallel to the plane of the tool handle to ensure that the cutting position of the tool is correct after the tool is clamped; the rake angle of the turning tool is 5~ 7 °, the back angle of the turning tool is 10～12 ° along the profile; when the hard alloy valve seat turning tool processes the stainless steel valve seat, the cutting speed of the turning tool is 680～720 rpm, and the linear speed is 14.5～20.5 meters /min, feed speed 0.035～0.045mm/rotate; When described cemented carbide valve seat turning tool processes superalloy valve seat, the cutting speed of turning tool is 280～320 rev/min, line speed 6.8～8.0 m/min Min, feed speed 0.025～0.035mm/rev.
如上所述的一种硬质合金活门座车刀及其应用，其所述的硬质合金活门 座车刀材料为T10MG(德国TIGRA牌)。所述的T10MG是晶粒度为0.5μ m，含钴量为10％的精细粒度硬质合金材料：硬度为92.5HRA，抗弯强度 3800N/mm2，强度为512psi。A kind of cemented carbide valve seat turning tool and application thereof as above, its described cemented carbide valve seat turning tool material is T10MG (Germany TIGRA brand). The T10MG is a fine-grained cemented carbide material with a grain size of 0.5 μm and a cobalt content of 10%. The hardness is 92.5HRA, the bending strength is 3800N/mm2, and the strength is 512psi.
如上所述的一种硬质合金活门座车刀及其应用，其所述的硬质合金活门 座车刀采用整体硬质合金；整体硬质合金活门座车刀可以修磨，重复使用。A kind of cemented carbide valve seat turning tool and application thereof as above, its described cemented carbide valve seat turning tool adopts solid carbide; The solid carbide valve seat turning tool can be repaired and reused.
如上所述的一种硬质合金活门座车刀及其应用，其所述的车刀的刀颈为 细长杆，便于活门座孔径较小的深孔加工。A kind of cemented carbide valve seat turning tool and application thereof as above, the knife neck of its described turning tool is a slender rod, which is convenient for the less deep hole processing of the valve seat aperture.
如上所述的一种硬质合金活门座车刀及其应用，其所述的硬质合金活门 座车刀型面内侧采取了铲背形式，铲背后角半径略小于活门孔半径，避免加 工时发生干涉。A kind of hard alloy valve seat turning tool and its application as mentioned above, the inner side of the surface of the hard alloy valve seat turning tool is in the form of shovel back, and the radius of the back corner of the shovel is slightly smaller than the radius of the valve hole, so as to avoid Interference occurs.
如上所述的一种硬质合金活门座车刀及其应用，其所述的硬质合金活门 座车刀上涂覆有涂层，该涂层采用纳米蓝涂层。A kind of hard alloy valve seat turning tool as above and application thereof, be coated with coating on its described cemented carbide valve seat turning tool, this coating adopts nanometer blue coating.
如上所述的一种硬质合金活门座车刀及其应用，其所述的硬质合金活门 座车刀加工不锈钢1Cr18Ni9Ti活门座时，切削速度为700转/分，线速度17.5 米/分，进给速度0.04mm/转。A kind of cemented carbide valve seat turning tool and its application as above, when its described cemented carbide valve seat turning tool processes stainless steel 1Cr18Ni9Ti valve seat, the cutting speed is 700 rev/min, line speed 17.5 m/min, Feed speed 0.04mm/rev.
如上所述的一种硬质合金活门座车刀及其应用，其所述的硬质合金活门 座车刀加工高温合金GH4169活门座时，车刀的切削速度为300转/分，线速 度7.5米/分，进给速度0.03mm/转。A kind of cemented carbide valve seat turning tool and its application as above, when its described cemented carbide valve seat turning tool processes the superalloy GH4169 valve seat, the cutting speed of the turning tool is 300 rpm, and the line speed is 7.5 m/min, feed speed 0.03mm/rev.
本发明的效果在于：Effect of the present invention is:
本发明所述的硬质合金活门座车刀，具有硬度高、耐磨性好、加工效率 高、使用寿命长等优点。前期工艺试验表明，采用硬质合金车刀加工的活门 座具有更好的轮廓度(100倍显微镜下观测)和表面光洁度，此外，加工效 率能提高50％以上，刀具使用寿命也能够提高一倍以上。The cemented carbide valve seat turning tool of the present invention has the advantages of high hardness, good wear resistance, high processing efficiency and long service life. The preliminary process test shows that the valve seat processed by cemented carbide turning tool has better contour (observed under 100 times microscope) and surface finish. In addition, the processing efficiency can be increased by more than 50%, and the service life of the tool can also be doubled. above.
硬质合金活门座车刀加工的不锈钢活门座型面的表面比高速钢加工的纹 路均匀、细腻，光洁度高两个等级，粗糙度能够达到Ra0.2。The surface of the stainless steel valve seat processed by the carbide valve seat turning tool is more uniform and finer than the surface of the high-speed steel, and the finish is two grades higher, and the roughness can reach Ra0.2.
加工不锈钢(1Cr18Ni9Ti)硬质合金活门座车刀的切削速度为700转/ 分(线速度17.5米/分)，进给速度0.04mm/转；高速钢活门座车刀300转/ 分(线速度7.5米/分)进给速度0.03mm/转，加工效率提高1倍以上。The cutting speed of the machining stainless steel (1Cr18Ni9Ti) carbide valve seat turning tool is 700 rpm (line speed 17.5 m/min), and the feed rate is 0.04mm/rev; the high-speed steel valve seat turning tool is 300 rpm (line speed 7.5 m/min) The feed speed is 0.03mm/rev, and the processing efficiency is more than doubled.
加工高温合金(GH4169)硬质合金活门座车刀的切削速度为300转/ 分(线速度7.5米/分)，进给速度0.03mm/转；高速钢活门座车刀50转/分(线 速度1.25米/分)，进给速度0.02mm/转，加工效率提高2倍以上。The cutting speed of processing superalloy (GH4169) carbide valve seat turning tool is 300 rev/min (line speed 7.5 m/min), feed speed 0.03mm/rev; high speed steel valve seat turning tool 50 rev/min (line speed The speed is 1.25 m/min), the feed speed is 0.02mm/rev, and the processing efficiency is increased by more than 2 times.
高速钢活门座车刀加工不锈钢活门型面15件，硬质合金活门座车刀加工 的不锈钢活门型面50件，硬质合金活门座车刀加工的不锈钢活门型面的耐用 度提高3倍以上。15 pieces of stainless steel valve surfaces processed by high-speed steel valve seat turning tools, 50 pieces of stainless steel valve surfaces processed by carbide valve seat turning tools, and the durability of stainless steel valve surfaces processed by carbide valve seat turning tools is increased by more than 3 times .
高速钢活门座车刀加工高温合金活门型面2件(加工困难，基本加工不 动)，硬质合金活门座车刀加工的高温合金活门型面20件，耐用度提高10 倍，而且切削轻快，光洁度较好，基本没有毛刺。2 pieces of high-temperature alloy valve profiles processed by high-speed steel valve seat turning tools (difficult to process, basically not moving), 20 pieces of high-temperature alloy valve profiles processed by carbide valve seat turning tools, the durability is increased by 10 times, and the cutting is light , the finish is good, basically no burrs.
在30倍镜头下硬质合金刀具加工的型面轮廓非常清晰；高速钢刀具加工 的型面轮廓略有模糊。Under the 30 times lens, the profile of the carbide tool is very clear; the profile of the high-speed steel tool is slightly blurred.
附图说明Description of drawings
图1为本发明所述的一种硬质合金活门座车刀主视图；Fig. 1 is a kind of carbide valve seat turning tool front view of the present invention;
图2为本发明所述的一种硬质合金活门座车刀俯视图；Fig. 2 is a kind of cemented carbide valve seat turning tool top view of the present invention;
图3为本发明所述的一种硬质合金活门座车刀左视图；Fig. 3 is a left side view of a hard alloy valve seat turning tool according to the present invention;
图4为图2的局部放大图。FIG. 4 is a partially enlarged view of FIG. 2 .
图中：1.刀柄；2.前角刃口；3.刀颈。In the figure: 1. The handle of the knife; 2. The rake edge; 3. The neck of the knife.
具体实施方式Detailed ways
下面结合附图和具体实施例对本发明所述的一种硬质合金活门座车刀及 其应用作进一步描述。A kind of cemented carbide valve seat turning tool of the present invention and its application are further described below in conjunction with accompanying drawing and specific embodiment.
实施例1Example 1
本发明所述的一种硬质合金活门座车刀材料采用精细粒度硬质合金，晶 粒度≤0.5μm；例如：材料为T10MG(德国TIGRA牌)，T10MG是晶粒度 为0.5μm，含钴量为10％的精细粒度硬质合金材料：硬度为92.5HRA，抗弯 强度3800N/mm2，强度为512psi。A kind of cemented carbide valve seat turning tool material of the present invention adopts fine-grained cemented carbide, grain size≤0.5 μm; For example: material is T10MG (Germany TIGRA brand), and T10MG is that grain size is 0.5 μm, contains Fine-grained cemented carbide material with 10% cobalt content: the hardness is 92.5HRA, the bending strength is 3800N/mm2, and the strength is 512psi.
所述的硬质合金活门座车刀采用整体硬质合金；整体硬质合金活门座车 刀可以修磨，重复使用。Described cemented carbide valve seat turning tool adopts solid carbide; The solid carbide valve seat turning tool can be repaired and reused.
如图1和图2所示，刀柄1有上、下两平面，便于装夹；前角刃口2与 刀柄1平面平行，保证刀具装夹后，刀具的切削位置正确；刀颈3为细长杆， 便于活门座孔径较小的深孔加工。车刀前角5°，车刀后角沿型面10°。As shown in Figure 1 and Figure 2, the tool handle 1 has two planes, upper and lower, which are convenient for clamping; the rake edge 2 is parallel to the plane of the tool handle 1 to ensure that the cutting position of the tool is correct after the tool is clamped; the knife neck 3 It is a slender rod, which is convenient for deep hole processing with small hole diameter of the valve seat. The rake angle of the turning tool is 5°, and the back angle of the turning tool is 10° along the profile.
如图3所示，硬质合金活门座车刀型面内侧采取了铲背形式，铲背后角 半径略小于活门孔半径，避免加工时发生干涉。本发明硬质合金活门座车刀 相对于高速钢活门座车刀增加了刃部的厚度，去掉后了后刀面R5沟槽，提高 了刀具的强度。铲背后角有效避免了加工时的干涉问题，提高了刀具的强度 和耐用度，降低了后角的加工难度，并提高了活门座的加工质量。As shown in Figure 3, the inner side of the turning tool profile of the carbide valve seat adopts the form of shovel back, and the radius of the back corner of the shovel is slightly smaller than the radius of the valve hole to avoid interference during processing. Compared with the high-speed steel valve seat turning tool, the hard alloy valve seat turning tool of the present invention has increased the thickness of the blade portion, removed the flank R5 groove, and improved the intensity of the cutter. The back angle of the shovel effectively avoids the interference problem during processing, improves the strength and durability of the tool, reduces the processing difficulty of the back angle, and improves the processing quality of the valve seat.
本发明硬质合金活门座车刀上涂覆有涂层，该涂层采用纳米蓝涂层，使 得刀具的耐磨度提高30％左右。纳米蓝涂层为高铝涂层，同时添加了Si元素， 使得刀具硬度更高；还含有Cr元素，保证纳米蓝涂层具有高硬度的同时，还 具有良好的附着力，更加不易脱落。The cemented carbide valve seat turning tool of the present invention is coated with a coating, and the coating adopts a nano-blue coating, so that the wear resistance of the tool is increased by about 30%. The nano-blue coating is a high-aluminum coating, and Si is added to make the tool harder; it also contains Cr to ensure that the nano-blue coating has high hardness and good adhesion, making it more difficult to fall off.
所述的硬质合金活门座车刀加工不锈钢1Cr18Ni9Ti活门座时，切削速度为 700转/分，线速度17.5米/分，进给速度0.04mm/转。When described cemented carbide valve seat turning tool processes stainless steel 1Cr18Ni9Ti valve seat, cutting speed is 700 rev/min, line speed 17.5 meters/min, feed speed 0.04mm/rev.
所述的硬质合金活门座车刀加工高温合金GH4169活门座时，车刀的切 削速度为300转/分，线速度7.5米/分，进给速度0.03mm/转。When described cemented carbide valve seat turning tool processes superalloy GH4169 valve seat, the cutting speed of turning tool is 300 revs/min, line speed 7.5 meters/min, feed speed 0.03mm/rev.
实施例2Example 2
本发明所述的一种硬质合金活门座车刀材料采用精细粒度硬质合金，晶 粒度≤0.5μm；A kind of cemented carbide valve seat turning tool material of the present invention adopts fine-grained cemented carbide, and grain size≤0.5 μ m;
所述的硬质合金活门座车刀采用整体硬质合金；整体硬质合金活门座车 刀可以修磨，重复使用。Described cemented carbide valve seat turning tool adopts solid carbide; The solid carbide valve seat turning tool can be repaired and reused.
如图1和图2所示，刀柄1有上、下两平面，便于装夹；前角刃口2与 刀柄1平面平行，保证刀具装夹后，刀具的切削位置正确；刀颈3为细长杆， 便于活门座孔径较小的深孔加工。车刀前角6°，车刀后角沿型面11°。As shown in Figure 1 and Figure 2, the tool handle 1 has two planes, upper and lower, which are convenient for clamping; the rake edge 2 is parallel to the plane of the tool handle 1 to ensure that the cutting position of the tool is correct after the tool is clamped; the knife neck 3 It is a slender rod, which is convenient for deep hole processing with small hole diameter of the valve seat. The rake angle of the turning tool is 6°, and the back angle of the turning tool is 11° along the profile.
本发明硬质合金活门座车刀上涂覆有涂层，该涂层采用纳米蓝涂层。The hard alloy valve seat turning tool of the present invention is coated with a coating, and the coating adopts a nanometer blue coating.
所述的硬质合金活门座车刀加工不锈钢1Cr18Ni9Ti活门座时，切削速度为 680转/分，线速度14.5米/分，进给速度0.035mm/转。When described cemented carbide valve seat turning tool processes stainless steel 1Cr18Ni9Ti valve seat, cutting speed is 680 revs/min, line speed 14.5 meters/min, feed speed 0.035mm/rev.
所述的硬质合金活门座车刀加工高温合金GH4169活门座时，车刀的切 削速度为280转/分，线速度6.8米/分，进给速度0.025mm/转。When described cemented carbide valve seat turning tool processes superalloy GH4169 valve seat, the cutting speed of turning tool is 280 revs/min, linear speed 6.8 meters/min, and feed speed 0.025mm/rev.
实施例3Example 3
本发明所述的一种硬质合金活门座车刀材料采用精细粒度硬质合金，晶 粒度≤0.5μm；A kind of cemented carbide valve seat turning tool material of the present invention adopts fine-grained cemented carbide, and grain size≤0.5 μ m;
所述的硬质合金活门座车刀采用整体硬质合金；整体硬质合金活门座车 刀可以修磨，重复使用。Described cemented carbide valve seat turning tool adopts solid carbide; The solid carbide valve seat turning tool can be repaired and reused.
如图1和图2所示，刀柄1有上、下两平面，便于装夹；前角刃口2与 刀柄1平面平行，保证刀具装夹后，刀具的切削位置正确；刀颈3为细长杆， 便于活门座孔径较小的深孔加工。车刀前角7°，车刀后角沿型面12°。As shown in Figure 1 and Figure 2, the tool handle 1 has two planes, upper and lower, which are convenient for clamping; the rake edge 2 is parallel to the plane of the tool handle 1 to ensure that the cutting position of the tool is correct after the tool is clamped; the knife neck 3 It is a slender rod, which is convenient for deep hole processing with small hole diameter of the valve seat. The rake angle of the turning tool is 7°, and the back angle of the turning tool is 12° along the profile.
本发明硬质合金活门座车刀上涂覆有涂层，该涂层采用纳米蓝涂层。The hard alloy valve seat turning tool of the present invention is coated with a coating, and the coating adopts a nanometer blue coating.
所述的硬质合金活门座车刀加工不锈钢1Cr18Ni9Ti活门座时，切削速度为 720转/分，线速度20.5米/分，进给速度0.045mm/转。When described cemented carbide valve seat turning tool processes the stainless steel 1Cr18Ni9Ti valve seat, the cutting speed is 720 revs/min, 20.5 meters/min of line speed, and 0.045mm/rev of feed speed.
所述的硬质合金活门座车刀加工高温合金GH4169活门座时，车刀的切 削速度为320转/分，线速度8.0米/分，进给速度0.035mm/转。When described cemented carbide valve seat turning tool processes superalloy GH4169 valve seat, the cutting speed of turning tool is 320 revs/min, linear speed 8.0 meters/min, and feed speed 0.035mm/rev.
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