CN202845951U - Tool for machining hole bottom reverse chamfering - Google Patents

Tool for machining hole bottom reverse chamfering Download PDF

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Publication number
CN202845951U
CN202845951U CN 201220508086 CN201220508086U CN202845951U CN 202845951 U CN202845951 U CN 202845951U CN 201220508086 CN201220508086 CN 201220508086 CN 201220508086 U CN201220508086 U CN 201220508086U CN 202845951 U CN202845951 U CN 202845951U
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tool
cutting head
eccentric
angle
reverse
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徐忠兰
黄华栋
顾晋
滕琦
李春雷
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Suzhou Vocational Institute of Industrial Technology
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Abstract

本实用新型提供了一种用于加工孔底反倒角的刀具,该刀具包括一体相连的刀柄、刀杆、切削头,以及套接于刀柄外侧的偏心套,与切削头一体相连的硬质合金刀片,所述刀柄、刀杆及切削头零偏心同步转动,该切削头与偏心套之间存在具可调性的偏心e,满足

Figure DEST_PATH_IMAGE001
,其中D为反倒角内孔的直径,d为切削头带合金刀片刀刃处的直径,h是反倒角的高度、α为反倒角的角度。本实用新型刀具的研制,可根据工件内孔的孔径大小,设计不同偏心e的偏心套,利用偏心与NC程序控制,即可在CNC上高精度、高效自动加工不同孔径的反倒角。

Figure 201220508086

The utility model provides a tool for machining reverse chamfering at the bottom of a hole. The tool includes a tool handle integrally connected, a tool bar, a cutting head, an eccentric sleeve sleeved on the outer side of the tool handle, and a hard tool integrally connected with the cutting head. High-quality alloy blades, the tool holder, tool bar and cutting head rotate synchronously with zero eccentricity, and there is an adjustable eccentricity e between the cutting head and the eccentric sleeve, which meets the

Figure DEST_PATH_IMAGE001
, where D is the diameter of the inner hole of the reverse chamfer, d is the diameter of the edge of the cutting head with the alloy blade, h is the height of the reverse chamfer, and α is the angle of the reverse chamfer. The development of the tool of the utility model can design eccentric sleeves with different eccentricities according to the diameter of the inner hole of the workpiece, and use the eccentricity and NC program control to automatically process the reverse chamfers of different diameters on the CNC with high precision and high efficiency.

Figure 201220508086

Description

用于加工孔底反倒角的刀具Tools for chamfering the bottom of holes

技术领域 technical field

本实用新型涉及一种金属切削工具,尤其涉及一种用于加工金属工件孔底反倒角的切削工具。 The utility model relates to a metal cutting tool, in particular to a cutting tool used for machining reverse chamfering of the hole bottom of a metal workpiece.

背景技术 Background technique

在常规的金属工件加工中,加工内孔的正面倒角是比较方便的,可在机床上用带角度的倒角刀,也可徒手用刮刀刮。但加工内孔反倒角就困难多了。对加工零件内孔反倒角,传统上靠手工刮刀刮,或用小五金专用倒角器倒角。这样不仅效率低,而且容易划伤工件。如图1所示,是一种待加工工件的结构剖视图,图示中工件1具有上、下两个与内腔通透的内孔11、内孔12,特别是对内孔端面与工件内腔筋壁距离L非常近,倒角111、112要求较高时,小五金专用倒角器无法伸展,刮刀无法深入。尤其是当孔较深时,刀具强度难以得到保证。 In conventional metal workpiece processing, it is more convenient to process the front chamfering of the inner hole. You can use an angled chamfering knife on the machine tool, or scrape it with a scraper by hand. However, it is much more difficult to process the reverse chamfering of the inner hole. For the reverse chamfering of the inner hole of the processed parts, it is traditionally scraped with a manual scraper, or chamfered with a special chamferer for small hardware. This is not only inefficient, but also easy to scratch the workpiece. As shown in Figure 1, it is a structural cross-sectional view of a workpiece to be processed. In the illustration, the workpiece 1 has two upper and lower inner holes 11 and 12 that are transparent to the inner cavity. The rib wall is very close to L, and when the chamfering 111 and 112 are highly required, the special chamfering device for hardware cannot be stretched, and the scraper cannot go deep. Especially when the hole is deep, it is difficult to guarantee the tool strength.

发明内容 Contents of the invention

本实用新型公开了一种高强度偏心套式硬质合金孔底反倒角刀具,是针对某些精密零件内孔均需反向倒角,特别是对倒角的角度、深度有较高要求时,也能解决有些零件需倒角的端面与内筋壁距离非常近状态下反倒角加工问题。 The utility model discloses a high-strength eccentric sleeve type cemented carbide hole bottom reverse chamfering tool, which is aimed at the inner holes of some precision parts requiring reverse chamfering, especially when there are higher requirements for the angle and depth of the chamfering , It can also solve the problem of reverse chamfering when the distance between the end face of some parts that needs to be chamfered and the inner rib wall is very close.

本实用新型实现上述目的的技术解决方案是:一种用于加工孔底反倒角的刀具,其特征在于,所述刀具包括一体相连的刀柄、刀杆、切削头,以及套接于刀柄外侧的偏心套,与切削头一体相连的硬质合金刀片,所述刀柄、刀杆及切削头零偏心,所述切削头与偏心套之间存在具可调性的偏心e,满足                                                

Figure 555508DEST_PATH_IMAGE001
,其中D为反倒角内孔的直径,d为切削头带合金刀片刀刃处的直径,h是反倒角的高度、α为反倒角的角度。 The technical solution of the utility model to achieve the above purpose is: a tool for machining reverse chamfering at the bottom of a hole, characterized in that the tool includes a tool handle, a tool bar, a cutting head that are integrally connected, and a tool that is sleeved on the tool handle The eccentric sleeve on the outside, the cemented carbide blade integrally connected with the cutting head, the shank, the shank and the cutting head have zero eccentricity, and there is an adjustable eccentricity e between the cutting head and the eccentric sleeve, which satisfies
Figure 555508DEST_PATH_IMAGE001
, where D is the diameter of the inner hole of the reverse chamfer, d is the diameter of the edge of the cutting head with the alloy blade, h is the height of the reverse chamfer, and α is the angle of the reverse chamfer.

进一步地,所述偏心套包括偏心范围介于1.5~5mm的M型偏心套和偏心范围介于5~17mm的N型偏心套。 Further, the eccentric sleeve includes an M-type eccentric sleeve with an eccentric range of 1.5-5 mm and an N-type eccentric sleeve with an eccentric range of 5-17 mm.

进一步地,所述刀杆为断面呈橄榄形的淬火钢杆体。 Further, the cutter rod is a quenched steel rod body with an olive-shaped section.

进一步地,所述偏心套设有具偏心e的套孔,所述刀柄与套孔相滑配,且刀柄通过穿透偏心套的平头螺钉紧固在套孔内。 Further, the eccentric sleeve is provided with a sleeve hole with an eccentric e, the handle of the knife is slipped into the sleeve hole, and the handle of the knife is fastened in the sleeve hole by a grub screw penetrating the eccentric sleeve.

进一步地,所述偏心套朝向切削头的一面设有位置刻线。 Further, the side of the eccentric sleeve facing the cutting head is provided with a position marking line.

应用本实用新型技术方案后,其显著的技术效果体现为:该刀具可根据工件内孔的孔径大小,设计不同偏心e的偏心套,利用偏心与NC程序控制,即可在CNC上高精度、高效自动加工不同孔径的反倒角,提升了特殊应用下金属切削加工工具的灵活性、精度。 After applying the technical solution of the utility model, its remarkable technical effect is embodied as follows: the cutting tool can design eccentric sleeves with different eccentricities according to the diameter of the inner hole of the workpiece, and use eccentricity and NC program control to achieve high-precision, Efficient and automatic processing of reverse chamfers of different apertures improves the flexibility and precision of metal cutting tools for special applications.

以下便结合实施例附图,对本实用新型的具体实施方式作进一步的详述,以使本实用新型技术方案更易于理解、掌握。 The specific implementation of the utility model will be described in further detail below in conjunction with the accompanying drawings of the embodiments, so as to make the technical solution of the utility model easier to understand and grasp.

附图说明 Description of drawings

图1是一种待加工工件的结构剖视图。 Fig. 1 is a structural sectional view of a workpiece to be processed.

图2是本实用新型刀柄、刀杆、切削头的一体化结构示意图。 Fig. 2 is a schematic diagram of the integrated structure of the utility model tool handle, tool bar and cutting head.

图3是本实用新型M型偏心套的结构示意图。 Fig. 3 is a structural schematic diagram of an M-type eccentric sleeve of the present invention.

图4是本实用新型N型偏心套的结构示意图。 Fig. 4 is a structural schematic diagram of an N-type eccentric sleeve of the present invention.

图5是本实用新型刀具加工反倒角的工作状态示意图。 Fig. 5 is a schematic diagram of the working state of the utility model tool for machining reverse chamfering.

具体实施方式 Detailed ways

本实用新型公开了一种高强度偏心套式硬质合金孔底反倒角刀具,是针对某些精密零件内孔均需反向倒角,特别是对倒角的角度、深度有较高要求时,也能解决有些零件需倒角的端面与内筋壁距离非常近状态下反向倒角。 The utility model discloses a high-strength eccentric sleeve type cemented carbide hole bottom reverse chamfering tool, which is aimed at the inner holes of some precision parts requiring reverse chamfering, especially when there are higher requirements on the angle and depth of the chamfering , It can also solve the reverse chamfering when the end face of some parts that needs to be chamfered is very close to the inner rib wall.

如图2至图4所示,该种用于加工孔底反倒角的刀具,一体相连的刀柄21、刀杆22、切削头23,以及套接于刀柄外侧的偏心套,与切削头23一体相连的硬质合金刀片24。其中该刀柄21、刀杆22及切削头23零偏心,而切削头23与偏心套之间存在具可调性的偏心e,满足

Figure 331703DEST_PATH_IMAGE001
,其中D为反倒角内孔的直径,d为切削头带合金刀片刀刃处的直径,h是反倒角的高度、α为反倒角的角度。无特别要求时,可简化公式计算:
Figure 728750DEST_PATH_IMAGE002
。 As shown in Fig. 2 to Fig. 4, this kind of cutting tool for processing the reverse chamfering of the bottom of the hole, the integrally connected tool handle 21, tool bar 22, cutting head 23, and the eccentric sleeve sleeved on the outside of the tool handle, and the cutting head 23 integrally connected hard alloy blades 24. Wherein the tool handle 21, tool bar 22 and cutting head 23 have zero eccentricity, and there is an adjustable eccentricity e between the cutting head 23 and the eccentric sleeve, which satisfies
Figure 331703DEST_PATH_IMAGE001
, where D is the diameter of the inner hole of the reverse chamfer, d is the diameter of the edge of the cutting head with the alloy blade, h is the height of the reverse chamfer, and α is the angle of the reverse chamfer. When there is no special requirement, the formula calculation can be simplified:
Figure 728750DEST_PATH_IMAGE002
.

由刀柄、刀杆、切削头组成的刀体需淬火HRC50,偏心套淬火HRC48。硬质合金刀片钎焊在切削头上,焊接牢固,不得有裂纹,硬质合金的材质根据被加工零件选定,如YG6X、YL10.2、YT14等。根据偏心数值的大小差异,偏心套分为偏心范围介于1.5~5mm的M型偏心套(如图3所示)和偏心范围介于5~17mm的N型偏心套(如图4所示)。图3所示可见,该M型偏心套31具有偏心的套孔311,且穿透偏心套设有穿孔。图4所示可见,该N型偏心套32具有偏心的套孔321,且穿透偏心套设有穿孔。刀柄与套孔相滑配,且刀柄通过穿透偏心套的平头螺钉紧固在套孔内,上述穿孔用于平头螺钉穿接并压紧锁固刀柄。需要说明的是,上述所谓偏心e,指的是加工中心主轴中心线与偏心套所设套孔的中心线的距离偏差,而套孔的中心线与刀体之间零偏心。 The tool body consisting of tool handle, tool bar and cutting head needs to be quenched to HRC50, and the eccentric sleeve is quenched to HRC48. The cemented carbide blade is brazed on the cutting head, and the welding is firm without cracks. The material of the cemented carbide is selected according to the parts to be processed, such as YG6X, YL10.2, YT14, etc. According to the difference in eccentric value, eccentric sleeves are divided into M-type eccentric sleeves with an eccentric range of 1.5-5mm (as shown in Figure 3) and N-type eccentric sleeves with an eccentric range of 5-17mm (as shown in Figure 4) . As can be seen in FIG. 3 , the M-shaped eccentric sleeve 31 has an eccentric sleeve hole 311 , and a perforation is provided through the eccentric sleeve. As shown in FIG. 4 , it can be seen that the N-type eccentric sleeve 32 has an eccentric sleeve hole 321 , and a perforation is provided through the eccentric sleeve. The knife handle is slippery matched with the sleeve hole, and the knife handle is fastened in the sleeve hole by the grub screw penetrating the eccentric sleeve. The above-mentioned perforation is used for the grub screw to penetrate and press to lock the handle. It should be noted that the above-mentioned so-called eccentricity e refers to the distance deviation between the center line of the spindle of the machining center and the center line of the hole set by the eccentric sleeve, and there is zero eccentricity between the center line of the hole and the tool body.

特别地,上述刀杆22为断面呈橄榄形的淬火钢杆体。刀杆的长度应略长于需反倒角内孔的深度,其断面为橄榄状。橄榄形断面是由两个相同圆弧交叉组成的,其半径要略小于切削头带合金刀片刀刃处的半径。 In particular, the above-mentioned knife rod 22 is a hardened steel rod body with an olive-shaped section. The length of the tool bar should be slightly longer than the depth of the inner hole to be chamfered, and its section is olive-shaped. The olive-shaped section is formed by the intersection of two identical arcs, and its radius is slightly smaller than the radius of the cutting head with alloy blade.

本实用新型刀具在工作时:首先需要编程设定将CNC主轴旋转停止时始终固定在一特定位置。然后根据内孔的直径和所需加工的反倒角的规格选择合适的偏心套。并将刀柄装接在偏心套的套孔中,要求硬质合金刀头平行于偏心套端面所设的位置刻线312、322,刀刃在短的位置刻线方向上。该位置刻线通常宽0.2mm、深0.1mm,并涂红色。校正后采用内六角平头螺钉将刀柄锁固在套孔内。继而将偏心套装接在CNC主轴中,伸入待加工工件的内孔中并调整位置,启动主轴,走刀并按孔深方向提升刀具,利用偏心e反倒角至所需的规格。最后通过调整刀具位置,可在不破坏内孔表面的情况下将刀具退出,完成一次反倒角的加工。 When the tool of the utility model is working: firstly, programming is required to fix the CNC spindle at a specific position when it stops rotating. Then select the appropriate eccentric sleeve according to the diameter of the inner hole and the specifications of the reverse chamfer to be processed. And the handle of a knife is assembled in the sleeve hole of eccentric sleeve, requires hard alloy cutter head to be parallel to the position scribe line 312,322 that eccentric sleeve end face is established, and blade is on the short position scribe line direction. The engraved line at this position is usually 0.2mm wide and 0.1mm deep, and is painted red. After correction, use the hexagon socket flat head screw to lock the handle in the sleeve hole. Then connect the eccentric sleeve to the CNC spindle, extend it into the inner hole of the workpiece to be processed and adjust the position, start the spindle, move the tool and lift the tool in the direction of the hole depth, and use the eccentric e to chamfer to the required specification. Finally, by adjusting the position of the tool, the tool can be withdrawn without damaging the surface of the inner hole, and a reverse chamfering process can be completed.

本实用新型是采用橄榄形断面的刀杆,利用偏心套结构的硬质合金刀具,通过NC程序控制,能在加工中心(镗床、立铣也可)轻松、正确反倒角,即使工作范围狭窄或内孔较深,均可工作,适宜在¢12-¢42内孔范围反倒角,若改变偏心套的偏心距e与切削头部相关尺寸,也能加工其它孔径的反倒角。 The utility model adopts the cutter bar with olive-shaped cross section, utilizes the cemented carbide cutter with eccentric sleeve structure, and through the control of NC program, it can easily and correctly reverse the chamfering in the machining center (boring machine and vertical milling machine), even if the working range is narrow or The inner hole is deep and can work. It is suitable for reverse chamfering in the range of ¢12-¢42 inner hole. If the eccentric distance e of the eccentric sleeve and the related size of the cutting head are changed, the reverse chamfering of other hole diameters can also be processed.

本实用新型还可以有其它实施方式。凡采用等同替换或等效变换形成的技术方案,均落在本实用新型要求的保护范围。 The utility model can also have other embodiments. All technical solutions formed by equivalent replacement or equivalent transformation fall within the scope of protection required by the utility model.

Claims (5)

1. be used at the bottom of the machining hole the instead cutter at angle, it is characterized in that, described cutter comprises handle of a knife, knife bar, the cutting head that one links to each other, and the eccentric bushing that is socketed on the handle of a knife outside, the carbide chip that links to each other with the cutting head one, there is the eccentric e of tool adjustability in described handle of a knife, knife bar and cutting head zero eccentric synchronous the rotation between described cutting head and the eccentric bushing, satisfy , wherein D is the diameter of angle endoporus instead, and d is the diameter at cutting headband alloy blade blade place, and h is that the height, α at instead angle is the angle at angle instead.
2. according to claim 1 for the cutter at angle instead at the bottom of the machining hole, it is characterized in that: described eccentric bushing comprises that extent of the error is between the M of 1.5~5mm type eccentric bushing and the extent of the error N-type eccentric bushing between 5~17mm.
3. according to claim 1 for the cutter at angle instead at the bottom of the machining hole, it is characterized in that: described knife bar is that section is the olivary hardened steel body of rod.
4. according to claim 1 for the cutter at angle instead at the bottom of the machining hole, it is characterized in that: described eccentric bushing is provided with the trepanning of the eccentric e of tool, and described handle of a knife and trepanning are slippery, and handle of a knife is fastened in the trepanning by the flat head screw that penetrates eccentric bushing.
5. according to claim 1 for the cutter at angle instead at the bottom of the machining hole, it is characterized in that: described eccentric bushing is provided with the position groove towards the one side of cutting head.
CN 201220508086 2012-09-27 2012-09-27 Tool for machining hole bottom reverse chamfering Expired - Fee Related CN202845951U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102873352A (en) * 2012-09-27 2013-01-16 苏州工业职业技术学院 Cutter for machining reverse chamfer at hole bottom
CN103433562A (en) * 2013-08-15 2013-12-11 无锡蠡湖叶轮制造有限公司 Reverse rose reamer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102873352A (en) * 2012-09-27 2013-01-16 苏州工业职业技术学院 Cutter for machining reverse chamfer at hole bottom
CN103433562A (en) * 2013-08-15 2013-12-11 无锡蠡湖叶轮制造有限公司 Reverse rose reamer

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