CN203076613U - Special ultimate-ultra-heavy-load large-cutting-depth impact-resistant type blade - Google Patents

Special ultimate-ultra-heavy-load large-cutting-depth impact-resistant type blade Download PDF

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CN203076613U
CN203076613U CN 201320122668 CN201320122668U CN203076613U CN 203076613 U CN203076613 U CN 203076613U CN 201320122668 CN201320122668 CN 201320122668 CN 201320122668 U CN201320122668 U CN 201320122668U CN 203076613 U CN203076613 U CN 203076613U
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blade
cutting
arc
rake face
special
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程耀楠
刘利
吴明阳
何耿煌
孙守慧
胡强
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Harbin University of Science and Technology
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Harbin University of Science and Technology
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Abstract

The utility model discloses a special ultimate-ultra-heavy-load large-cutting-depth impact-resistant type blade, and belongs to the technical field of tools for turning machining, aiming at solving the problems that the existing tools for turning machining are single-edge welded type turning tools and very easy to break due to an impact, a tool-chip bonding phenomenon between the cutting edges of the tools and chips is easy to cause because the tools are not provided with chip-breaking grooves, the tools are low in service life, and increase for the production efficiency is seriously restricted. According to the special ultimate-ultra-heavy-load large-cutting-depth impact-resistant type blade, a long cutting edge and a short cutting edge are machined at the edge of the front blade surface of the blade; a double-arc tool nose is machined at the corner part of the front blade surface of the blade; the projected platform side surface of the front blade surface of the blade is an arc-shaped concave surface; the area encircled by the arc-shaped concave surface and the peripheral side of the front blade surface of the blade forms an arc-shaped chip-breaking groove; a flow guide groove is formed around the bottom of the arc-shaped chip-breaking groove; a tooth-shaped groove is machined in the peripheral side of a fastening screw counter bore; a blade bottom overflow heat dissipation hole is machined in the bottom surface convex column of the blade; and a blade bottom centre heat dissipation hole is formed between two support bosses. The special ultimate-ultra-heavy-load large-cutting-depth impact-resistant type blade disclosed by the utility model is used for large-cutting-depth turning machining in rough machining for large forging blanks.

Description

极限超重载大切深抗冲击型专用刀片Extreme ultra-heavy load, large depth of cut and impact-resistant special blade

技术领域technical field

本实用新型属于车削加工用刀具技术领域,尤其涉及一种极限超重载大切深抗冲击型专用刀片。The utility model belongs to the technical field of cutting tools for turning, in particular to a special impact-resistant blade with extreme super-heavy load and large depth of cut.

背景技术Background technique

大型加氢筒节毛坯是直接锻造而成,重量可达400多吨,待加工表面有很多普通锻件所没有的锻造缺陷,比如:锻造铲沟、氧化皮、锻造裂纹和金属覆盖物等;加氢筒节所用的材料比较特殊,具有很强的高温韧性。目前,加氢筒节荒加工需要进行车削和铣削加工,如车削加工所用刀具是单刃的焊接式车刀,加工过程中锻造缺陷引起的切削用量变化非常大,刀具承受的机械冲击时刻处于动态变化中,切削力最大可达10吨左右,刀具很容易受冲击而断裂,加上目前的刀具没有断屑槽,使加工过程中的切屑难于折断,缠绕在刀具上,使刀具的散热条件变差,从而导致切削区域温度不断升高(可达1000℃)。大量切削热堆积在切削区域上,加速了刀具的软化,从而很容易引起刀具的切削刃与切屑产生刀-屑粘结现象,刀具使用寿命低,严重制约生产效率的提高。The large-scale hydrogenation cylinder blank is directly forged, and the weight can reach more than 400 tons. There are many forging defects on the surface to be processed that ordinary forgings do not have, such as: forging shovels, scale, forging cracks and metal coverings, etc.; The materials used in the hydrogen cylinder section are quite special and have strong high temperature toughness. At present, turning and milling are required for the processing of hydrogenation cylinders. For example, the cutting tool used in turning processing is a single-edged welded turning tool. The cutting amount caused by forging defects during the processing changes greatly, and the mechanical impact on the cutting tool is always dynamic. During the change, the cutting force can reach up to about 10 tons, and the cutting tool is easily broken due to impact. In addition, the current cutting tool does not have a chip breaker, which makes it difficult to break the chips during processing, and winds up on the cutting tool, which makes the cooling condition of the cutting tool change. Poor, resulting in a continuous increase in the temperature of the cutting area (up to 1000 ° C). A large amount of cutting heat accumulates on the cutting area, which accelerates the softening of the tool, which easily causes the cutting edge of the tool and the chip to produce a knife-chip bonding phenomenon, and the service life of the tool is low, which seriously restricts the improvement of production efficiency.

实用新型内容Utility model content

本实用新型的目的是提供一种极限超重载大切深抗冲击型专用刀片,以解决目前车削加工所用刀具为单刃的焊接式车刀,刀具很容易受冲击而断裂,且由于刀具未设置断屑槽,容易引起刀具的切削刃与切屑产生刀-屑粘结现象,刀具使用寿命低,严重制约生产效率提高的问题。The purpose of this utility model is to provide a kind of extreme super-heavy load and large depth of cut impact-resistant special blade to solve the problem that the current turning tool used in turning processing is a single-edged welded turning tool. The tool is easily broken by impact, and because the tool is not set The chip breaker is easy to cause the cutting edge of the tool and the chip to produce a knife-chip bonding phenomenon, and the service life of the tool is low, which seriously restricts the improvement of production efficiency.

为了达到上述目的,本实用新型所采取的技术方案是:In order to achieve the above object, the technical scheme that the utility model takes is:

极限超重载大切深抗冲击型专用刀片,所述刀片的水平截面形状为长方形,所述刀片平行于长度方向的截面以及平行于宽度方向的截面形状均为等腰梯形,刀片底面的面积小于刀片前刀面的面积,刀片前刀面的两个长边缘处分别加工有一长切削刃,刀片前刀面的两个短边缘处分别加工有一短切削刃,刀片前刀面的四个角部分别加工有双弧形刀尖,刀片前刀面的中部设有长方形的突起平台,所述突起平台的面积小于刀片前刀面的面积,突起平台的四个侧面均为圆弧形凹面,由突起平台的四个圆弧形凹面与刀片前刀面外周边围成的区域构成弧形断屑槽,弧形断屑槽底部四周设有导流凹槽,突起平台上位于刀片前刀面的几何中心处沿刀片厚度方向加工有紧固螺钉沉孔,突起平台上位于紧固螺钉沉孔的外周边处均布加工有齿形凹槽,刀片底面沿宽度方向设有两个凸柱,两个凸柱相对于紧固螺钉沉孔的中心对称设置,每个凸柱内沿其长度方向加工有贯通的刀底溢流散热孔,刀底溢流散热孔与紧固螺钉沉孔相通,刀片底面沿长度方向设有两个支撑凸台,两个支撑凸台相对于刀片底面长度方向的中心线对称设置,两个支撑凸台之间的空间与刀片底面之间构成刀底中心散热槽,由支撑凸台的外侧面与刀片底面外周边围成的区域构成刀底周边散热槽,所述刀片的厚度S=8~10mm,所述刀片的后角α0=8°。Extremely heavy load, large depth of cut and impact-resistant special blade, the horizontal cross-section of the blade is rectangular, the cross-section parallel to the length direction and the cross-section parallel to the width direction of the blade are both isosceles trapezoidal, and the area of the bottom surface of the blade is less than The area of the rake face of the blade, the two long edges of the rake face of the blade are respectively processed with a long cutting edge, the two short edges of the rake face of the blade are respectively processed with a short cutting edge, and the four corners of the rake face of the blade Double-arc tool tips are respectively processed, and the middle part of the rake face of the blade is provided with a rectangular raised platform. The area of the raised platform is smaller than that of the rake face of the blade. The area surrounded by the four arc-shaped concave surfaces of the protruding platform and the outer periphery of the rake face of the insert forms an arc-shaped chip breaker, and there are guide grooves around the bottom of the arc-shaped chip breaker. The center of the geometry is processed with fastening screw counterbore along the thickness direction of the blade, and the protruding platform is evenly processed with tooth-shaped grooves at the outer periphery of the fastening screw counterbore. Two convex columns are arranged symmetrically with respect to the center of the counterbore of the fastening screw. Each convex column is processed with a through bottom overflow cooling hole along its length direction. The overflow cooling hole at the bottom of the knife communicates with the counterbore of the fastening screw. The bottom surface is provided with two supporting bosses along the length direction, and the two supporting bosses are arranged symmetrically with respect to the center line of the blade bottom surface in the length direction, and the space between the two supporting bosses and the bottom surface of the blade constitutes a heat dissipation groove in the center of the knife bottom. The area surrounded by the outer surface of the support boss and the outer periphery of the bottom surface of the blade constitutes a cooling groove around the bottom of the blade. The thickness of the blade is S=8-10 mm, and the back angle α 0 of the blade is 8°.

本实用新型的有益效果:The beneficial effects of the utility model:

1、本实用新型采用整体式结构,刀具受冲击不易断裂,由于设置有长切削刃和短切削刃,当对大型锻件毛坯进行大切深车削粗加工时,采用长切削刃可提高切削效率;在不需要大切削深度的情况下选用短切削刃,能提高加工精确度。1. The utility model adopts an integral structure, and the tool is not easy to break due to the impact. Since the long cutting edge and the short cutting edge are provided, when large-scale forging blanks are rough-machined with a large depth of cut, the cutting efficiency can be improved by using the long cutting edge; Short cutting edges are used when a large depth of cut is not required, which can improve machining accuracy.

2、双弧刀尖采用双条曲线圆弧设计方式,在切削过程中能有效降低切削阻力,对生成的切屑边沿进行预挤压,从而提升了弧形断屑槽的断屑效果,并能很好的降低切削噪音和提高刀片抗冲击性能。2. The double-arc tool tip adopts the double-curve arc design method, which can effectively reduce the cutting resistance during the cutting process, and pre-extrude the edge of the generated chips, thereby improving the chip breaking effect of the arc-shaped chip breaker, and can It is very good for reducing cutting noise and improving the impact resistance of the blade.

3、在刀片前刀面紧邻四个双弧形刀尖处设有四个半球形凸起,减少了长切削刃与短切削刃交接处的弧形断屑槽的深度,在小切削深度时对小切屑的卷曲有利,同时能对大切削深度时产生的切屑进行有效的导向并减少了刀尖附近与切屑的接触面积,从而降低了刀-屑在刀尖处的热传递。3. There are four hemispherical protrusions on the rake face of the insert adjacent to the four double-arc tool tips, which reduces the depth of the arc-shaped chip breaker at the junction of the long cutting edge and the short cutting edge. It is beneficial to the curling of small chips, and at the same time, it can effectively guide the chips generated at large cutting depths and reduce the contact area near the tool tip with chips, thereby reducing the heat transfer between the tool and chips at the tool tip.

4、设计弧形断屑槽,且弧形断屑槽的导屑墙(即突起平台的侧面)为圆弧形设计,不仅能有效提升弧形断屑槽的强度和切削过程精准度,同时能有效的对大型切屑进行卷曲和导向,降低大型切屑横行摆动的可能性,防止刀片的切削刃与切屑产生刀-屑粘结现象,延长了刀片的使用寿命,提高了生产效率。4. Design arc-shaped chip breaker, and the chip guide wall of the arc-shaped chip-breaker (that is, the side of the protruding platform) is designed in a circular arc shape, which can not only effectively improve the strength of the arc-shaped chip-breaker and the accuracy of the cutting process, but also It can effectively curl and guide large chips, reduce the possibility of large chips swinging sideways, prevent the cutting edge of the blade and chips from causing knife-chip bonding, prolong the service life of the blade, and improve production efficiency.

5、在弧形断屑槽底部四周设计有导流凹槽,有效的降低了切屑与弧形断屑槽底部的接触面积,同时在有使用切削液的情况下能有效的容积切削液,很好的对刀片切削区域进行散热降温。5. Diversion grooves are designed around the bottom of the arc-shaped chip breaker, which effectively reduces the contact area between chips and the bottom of the arc-shaped chip breaker. At the same time, it can effectively volume cutting fluid when using cutting fluid, which is very It is best to dissipate heat and cool down the cutting area of the blade.

6、突起平台上位于紧固螺钉沉孔的外周边处均布加工有齿形凹槽,该齿形凹槽不仅能容积切削液,同时还能使穿过紧固螺钉沉孔的紧固螺钉帽浸没在齿形凹槽所容积的切削液中,对紧固螺钉的冷却起到很好的作用;同时当切屑流经此处时,能使切削液在齿形凹槽周围形成的液体膜被打破,从而形成新的切削液膜冷却前刀面和紧固螺钉。6. The protruding platform is evenly processed with tooth-shaped grooves on the outer periphery of the fastening screw counterbore. The tooth-shaped groove can not only hold the cutting fluid, but also make the fastening screw passing through the fastening screw counterbore hole The cap is immersed in the cutting fluid contained in the tooth-shaped groove, which plays a good role in cooling the fastening screw; at the same time, when the chips flow through here, it can make the cutting fluid form a liquid film around the tooth-shaped groove is broken, thereby forming a new cutting fluid film to cool the rake face and fasten the screw.

7、刀片底部设计有凸柱,并在其内部开设有与紧固螺钉孔相通的刀底溢流散热孔,进入紧固螺钉孔的切削液和空气可以通过刀底溢流散热孔排出,从而起到冷热交换的作用。7. The bottom of the blade is designed with a convex column, and there is a knife bottom overflow cooling hole connected to the fastening screw hole inside. The cutting fluid and air entering the fastening screw hole can be discharged through the knife bottom overflow cooling hole, thereby Play the role of cold and heat exchange.

8、刀底中心散热槽穿过紧固螺钉孔,不仅增加了刀片底部的有效散热面积,同时也减少了刀片与刀杆的接触面积,降低了刀片与刀杆间的热量传递,并有容积切削液的功能。8. The heat dissipation groove in the center of the knife bottom passes through the fastening screw hole, which not only increases the effective heat dissipation area at the bottom of the blade, but also reduces the contact area between the blade and the knife rod, reduces the heat transfer between the blade and the knife rod, and has a large volume The function of cutting fluid.

9、在刀片底部四周设计有刀底周边散热槽,有效的增加了刀片底部的散热面积,同时能起到容积切削液和引流从刀底溢流散热孔排出的切削液与空气。9. There is a heat dissipation groove around the bottom of the blade, which effectively increases the heat dissipation area of the bottom of the blade, and at the same time can play a role in volume cutting fluid and drainage of cutting fluid and air discharged from the overflow cooling hole of the bottom of the blade.

10、刀片底部与刀杆安装接触的部位设计成刀底支撑凸台,减少了刀片与刀杆间的接触面积,同时降低了安装所需精度要求,并起到很好的抗震作用。10. The part where the bottom of the blade is in contact with the tool bar is designed as a supporting boss at the bottom of the knife, which reduces the contact area between the blade and the tool bar, and at the same time reduces the accuracy required for installation, and has a good anti-seismic effect.

11、本实用新型的刀片能承受的最大切削力可达到100~110KN,最大切削深度可达到30mm,可满足超大型锻件毛坯粗加工过程中工件材料去除量大(最大可达几十吨)需要的大切削深度要求。本实用新型的刀片的使用寿命是普通刀片的1.1倍,加工效率较原先提高30%左右。11. The maximum cutting force that the blade of this utility model can withstand can reach 100-110KN, and the maximum cutting depth can reach 30mm, which can meet the needs of large workpiece material removal (up to tens of tons) during rough machining of ultra-large forging blanks Large depth of cut requirements. The service life of the blade of the utility model is 1.1 times that of the ordinary blade, and the processing efficiency is increased by about 30% compared with the original one.

附图说明Description of drawings

图1是本实用新型的极限超重载大切深抗冲击型专用刀片的主视图,图2是图1的俯视图,图3是图2的A-A剖视图,图4是图1的仰视图,图5是图4的B-B剖视图,图6是本实用新型的极限超重载大切深抗冲击型专用刀片的立体图。Fig. 1 is a front view of the utility model's ultra-heavy load and large depth of cut impact-resistant special blade, Fig. 2 is a top view of Fig. 1, Fig. 3 is a sectional view of A-A of Fig. 2, Fig. 4 is a bottom view of Fig. 1, and Fig. 5 It is the B-B sectional view of Fig. 4, and Fig. 6 is a three-dimensional view of the ultra-heavy load, large depth of cut and impact-resistant special blade of the present utility model.

具体实施方式Detailed ways

具体实施方式一:如图1-图6所示,本实施方式的极限超重载大切深抗冲击型专用刀片,所述刀片的水平截面形状为长方形,所述刀片平行于长度方向的截面以及平行于宽度方向的截面形状均为等腰梯形,刀片底面的面积小于刀片前刀面的面积,刀片前刀面的两个长边缘处分别加工有一长切削刃16,刀片前刀面的两个短边缘处分别加工有一短切削刃17,刀片前刀面的四个角部分别加工有双弧形刀尖1,刀片前刀面的中部设有长方形的突起平台15,所述突起平台15的面积小于刀片前刀面的面积,突起平台15的四个侧面均为圆弧形凹面18,由突起平台15的四个圆弧形凹面18与刀片前刀面外周边围成的区域构成弧形断屑槽3,弧形断屑槽3底部四周设有导流凹槽4,突起平台15上位于刀片前刀面的几何中心处沿刀片厚度方向加工有紧固螺钉沉孔6,突起平台15上位于紧固螺钉沉孔6的外周边处均布加工有齿形凹槽5,刀片底面沿宽度方向设有两个凸柱8,两个凸柱8相对于紧固螺钉沉孔6的中心对称设置,每个凸柱8内沿其长度方向加工有贯通的刀底溢流散热孔7,刀底溢流散热孔7与紧固螺钉沉孔6相通,刀片底面沿长度方向设有两个支撑凸台11,两个支撑凸台11相对于刀片底面长度方向的中心线对称设置,两个支撑凸台11之间的空间与刀片底面之间构成刀底中心散热槽10,由支撑凸台11的外侧面与刀片底面外周边围成的区域构成刀底周边散热槽9,所述刀片的厚度S=8~10mm,所述刀片的后角α0=8°(即刀片后刀面13与竖直面之间的夹角)。Specific Embodiment 1: As shown in Figures 1-6, the extreme super-heavy load and large depth of cut impact-resistant special blade of this embodiment, the horizontal cross-sectional shape of the blade is rectangular, and the cross-section of the blade is parallel to the length direction and The cross-sectional shape parallel to the width direction is an isosceles trapezoid, the area of the blade bottom surface is less than the area of the blade rake face, a long cutting edge 16 is processed respectively at the two long edges of the blade rake face, and the two sides of the blade rake face A short cutting edge 17 is respectively processed at the short edge, and the four corners of the rake face of the blade are respectively processed with double arc-shaped tool tips 1, and the middle part of the rake face of the blade is provided with a rectangular raised platform 15, and the raised platform 15 The area is smaller than the area of the blade rake face, and the four sides of the raised platform 15 are arc-shaped concave surfaces 18, and the area surrounded by the four arc-shaped concave surfaces 18 of the raised platform 15 and the outer periphery of the blade rake face forms an arc Chipbreaker 3, guide groove 4 is provided around the bottom of arc-shaped chipbreaker 3, and the protruding platform 15 is located at the geometric center of the rake face of the blade. The outer periphery of the fastening screw counterbore 6 is uniformly processed with tooth-shaped grooves 5, and the bottom surface of the blade is provided with two protruding posts 8 along the width direction, and the two protruding posts 8 are opposite to the center of the fastening screw counterbore 6. Symmetrically arranged, each protruding column 8 is processed along its length direction with a through knife bottom overflow cooling hole 7, the knife bottom overflow cooling hole 7 communicates with the fastening screw sink hole 6, and the bottom surface of the blade is provided with two along the length direction. Supporting boss 11, two supporting bosses 11 are arranged symmetrically with respect to the centerline of blade bottom surface length direction, the space between two supporting bosses 11 and the blade bottom surface form knife bottom center cooling groove 10, by supporting boss The area surrounded by the outer surface of 11 and the outer periphery of the bottom surface of the blade constitutes the cooling groove 9 around the bottom of the blade, the thickness S of the blade is 8-10 mm, and the relief angle α 0 =8° of the blade (that is, the flank of the blade 13 angle with the vertical plane).

具体实施方式二:结合图1-图3及图5和图6说明,本实施方式所述刀片前刀面上紧邻四个双弧形刀尖1处设有四个半球形凸起2,且半球形凸起2设置在刀片前刀面的对角线上。本实施方式中未公开的技术特征与具体实施方式一相同。Specific embodiment two: In conjunction with Fig. 1-Fig. 3 and Fig. 5 and Fig. 6, four hemispherical protrusions 2 are provided on the rake face of the blade in this embodiment, adjacent to the four double-arc knife tips 1, and The hemispherical protrusion 2 is arranged on the diagonal line of the blade rake face. The undisclosed technical features in this embodiment are the same as those in the first embodiment.

具体实施方式三:本实施方式所述刀片的刃倾角为0°。本实施方式中未公开的技术特征与具体实施方式二相同。Embodiment 3: The blade inclination angle of the blade described in this embodiment is 0°. The undisclosed technical features in this embodiment are the same as those in the second embodiment.

本实用新型的极限超重载大切深抗冲击型专用刀片使用时,刀片通过紧固螺钉固定在刀杆(或刀盘)上。When the ultra-heavy load, large depth of cut and impact-resistant special blade of the utility model is used, the blade is fixed on the cutter bar (or cutter head) by fastening screws.

Claims (3)

1. the special-purpose blade of the big cutting-in shock resistance of a limit super-heavy load type, the horizontal cross sectional geometry of described blade is a rectangle, it is characterized in that: the cross sectional shape that described blade is parallel to the cross section of length direction and is parallel to width is isosceles trapezoid, the area of blade bottom surface is less than the area of blade rake face, two long edges of blade rake face are processed with a long cutting edge (16) respectively, two minor face edge places of blade rake face are processed with a short cutting edge (17) respectively, four bights of blade rake face are processed with two arc points of a knife (1) respectively, the middle part of blade rake face is provided with rectangular raised platform (15), the area of described raised platform (15) is less than the area of blade rake face, four sides of raised platform (15) are arc-shaped concave (18), four arc-shaped concaves (18) by raised platform (15) constitute arc chip-breaker (3) with the zone that blade rake face neighboring surrounds, arc chip-breaker (3) is provided with diversion groove (4) around the bottom, the geometric center place that is positioned at the blade rake face on the raised platform (15) is processed with trip bolt counterbore (6) along the blade thickness direction, be positioned at the uniform profile of tooth groove (5) that is processed with of outer circumference of trip bolt counterbore (6) on the raised platform (15), blade bottom surface broad ways is provided with two projections (8), two projections (8) are symmetrical arranged with respect to the center of trip bolt counterbore (6), be processed with overflow louvre (7) at the bottom of the cutter of perforation along its length direction in each projection (8), overflow louvre (7) communicates with trip bolt counterbore (6) at the bottom of the cutter, the blade bottom surface is provided with two support rims (11) along its length, two support rims (11) are symmetrical arranged with respect to the center line of blade bottom surface length direction, center radiating groove (10) at the bottom of the formation cutter between space between two support rims (11) and the blade bottom surface, the zone that is surrounded by the lateral surface and the neighboring, blade bottom surface of support rim (11) constitutes cutter bottom perimeter radiating groove (9), thickness S=8~the 10mm of described blade, the relief angle α of described blade 0=8 °.
2. according to the special-purpose blade of the big cutting-in shock resistance of the described limit super-heavy load of claim 1 type, it is characterized in that: four two arc points of a knife (1) of next-door neighbour locate to be provided with four hemispherical projections (2) on the described blade rake face, and hemispherical projections (2) is arranged on the diagonal of blade rake face.
3. according to the special-purpose blade of the big cutting-in shock resistance of the described limit super-heavy load of claim 2 type, it is characterized in that: the cutting edge inclination of described blade is 0 °.
CN 201320122668 2013-03-18 2013-03-18 Special ultimate-ultra-heavy-load large-cutting-depth impact-resistant type blade Expired - Fee Related CN203076613U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103128329A (en) * 2013-03-18 2013-06-05 哈尔滨理工大学 Limitation overload large cutting-in impact resistant type dedicated blade
CN104708039A (en) * 2015-03-20 2015-06-17 上海鹤工进出口有限公司 Novel blade and manufacturing method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103128329A (en) * 2013-03-18 2013-06-05 哈尔滨理工大学 Limitation overload large cutting-in impact resistant type dedicated blade
CN104708039A (en) * 2015-03-20 2015-06-17 上海鹤工进出口有限公司 Novel blade and manufacturing method thereof

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