CN214920816U

CN214920816U - CBN round nose milling cutter with negative chamfer design

Info

Publication number: CN214920816U
Application number: CN202120881822.0U
Authority: CN
Inventors: 娄兵占
Original assignee: Kunshan Xiangrun Tool Equipment Co ltd
Current assignee: Kunshan Xiangrun Tool Equipment Co ltd
Priority date: 2021-04-27
Filing date: 2021-04-27
Publication date: 2021-11-30
Anticipated expiration: 2031-04-27

Abstract

The utility model provides a hard round nose milling cutter of CBN whole with design of burden chamfer, includes rake face, back knife face, blade, rake face and back knife face meet, the blade form in rake face and back knife face department of meeting, milling cutter is the hard milling cutter of cubic boron nitride whole, blade department grinds out the burden chamfer of width 0.1-0.15 mm. The utility model discloses following beneficial effect has: the utility model discloses the hard round nose milling cutter of CBN finishing with negative chamfer design, including rake face, back knife face, blade, through setting up the negative chamfer of blade department grinding out, increase cutter wedge angle and improve cutter intensity, optimize the cutter heat dissipation condition simultaneously, can strengthen the cutting edge and make the cutting force increase the durability of cutter on less basis.

Description

CBN round nose milling cutter with negative chamfer design

[ technical field ] A method for producing a semiconductor device

The utility model relates to a mould high accuracy processing technology field, in particular to CBN round nose milling cutter that hardens entirely with negative chamfer design.

[ background of the invention ]

At present, CBN finishing and hard milling cutters still belong to the blank in China, most cutter manufacturers mainly use CBN blades, and the finishing and hard CBN technology threshold is too high and comprises a welding technology, a high-precision centerless grinding technology, a cutting edge grinding technology, a cutter application technology and the like, so that the finishing and hard CBN milling cutters are rarely involved. The CBN finish hard milling cutter can replace the traditional hard alloy finish hard milling cutter, and has obvious advantages in the processing of high-precision and high-hardness dies, no matter the abrasion of the cutter or the surface finish of a workpiece.

When the traditional whole hard milling cutter is used for processing a high-hardness die, the heat dissipation of the cutting edge of the cutter tip is untimely due to the large hardness of the die, and the cutting edge is abraded quickly.

[ Utility model ] content

An object of the utility model is to provide an improve the whole hard round nose milling cutter of CBN that has negative chamfer design of cutter intensity and incorruptibility.

The utility model aims at realizing through the following technical scheme:

the utility model provides a CBN round nose milling cutter entirely with design of burden chamfer, includes rake face, back knife face, blade, rake face and back knife face meet, the blade form in rake face and back knife face department of meeting, milling cutter is the cubic boron nitride blade, the grinding of blade department goes out the burden chamfer of width 0.1-0.15 mm.

In one embodiment, the rake surface forms a rake angle with the working surface, the rake angle being 25-35 °.

In one embodiment, the rake angle is 30 °.

In one embodiment, the milling cutter grinding process adopts a grinding wheel to grind, the grinding wheel comprises a high-gloss grinding wheel, and the negative chamfer is ground by the high-gloss grinding wheel.

In one embodiment, the front tool face and the rear tool face are both polished by the highlight grinding wheel.

In one embodiment, a controller is adopted to control the grinding wheel during grinding of the milling cutter, and the controller controls the grinding wheel to rotate in real time during grinding of the grinding wheel.

In one embodiment, a controller is used to control the rotation speed and feed of the milling cutter during the milling process.

In one embodiment, the milling cutter adopts a high-rotation-speed low-feed grinding mode.

Compared with the prior art, the utility model discloses following beneficial effect has: the utility model discloses the hard round nose milling cutter of CBN finishing with negative chamfer design, including rake face, back knife face, blade, through setting up the negative chamfer of blade department grinding out, increase cutter wedge angle and improve cutter intensity, optimize the cutter heat dissipation condition simultaneously, can strengthen the cutting edge and make the cutting force increase the durability of cutter on less basis.

[ description of the drawings ]

Fig. 1 is a partial schematic view of the CBN hard-and-round nose milling cutter with negative chamfer design of the utility model.

The relevant elements in the figures are numbered correspondingly as follows:

1. a front knife face,

2. a rear knife face is arranged on the front knife face,

3. and (7) cutting edges.

[ detailed description ] embodiments

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientation or positional relationship indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be considered limiting of the scope of the present application. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention of the present application, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art through specific situations.

Referring to fig. 1, a CBN full hard round nose milling cutter with negative chamfer design is a cubic boron nitride milling Cutter (CBN). The CBN milling cutter is a cutter which is formed by grinding after artificial synthesis of superhard Cubic Boron Nitride (CBN) micro powder. CBN is a material that is second only in hardness to diamond, so CBN inserts belong to superhard material cutters. As the cubic boron nitride can bear the high temperature of 1300-1500 ℃, the CBN blade can cut iron series metal at high speed without chemical reaction under the high temperature condition, the processing precision is high, the surface roughness is low, and the cutting life is prolonged by 5-10 times than that of a hard alloy cutter. The CBN full hard round nose milling cutter with the negative chamfer design comprises a front cutter face 1, a rear cutter face 2 and a cutting edge 3. When the milling cutter ball head is machined, the power source drives the milling cutter ball head to rotate around the rotation axis, so that the milling cutter is driven to rotate and feed. Preferably, the shape of the cutting edge 3 is a curve and conforms to the pre-formed structure required by the processing part of the workpiece, so that the highlight effect can be achieved without multiple processing, and the processing precision and the cutting power are improved. The milling cutter is a cubic boron nitride blade, a cutting edge 3 is ground to form a negative chamfer with the width of 0.1-0.15mm, and the negative chamfer is continuously ground.

In order to improve the precision of the milling cutter, in one embodiment, a rake angle is formed between the rake face 1 and the machined surface, and the rake angle is 25-35 °. Preferably, in one embodiment, the rake angle is 30 °.

In order to ensure the final precision of the processing, in one embodiment, the milling cutter is ground by a grinding wheel in the grinding process, the grinding wheel comprises a high-gloss grinding wheel, and the negative chamfer is ground by the high-gloss grinding wheel. The special bonding agent grinding wheel ensures that the CBN cutting edge is well maintained in the grinding process, thereby ensuring the precision and the stability of the cutter. Preferably, in one embodiment, the rake face 1 and the flank face 2 are both polished by a high-gloss grinding wheel.

In order to ensure the final precision of the processing, in one embodiment, a controller is used for controlling the grinding wheel in the milling process of the milling cutter, and the controller controls the grinding wheel to rotate in real time in the grinding process of the grinding wheel. The milling cutter can be selected from Mackino SEIKI tool grinder model SS 7. The processing advantage lies in U axle location, and only A axle and W axle are in the motion when processing circular arc class cutter, and the participation axle number is few, has promoted bulb precision grade greatly. The online dressing of the grinding wheel comprises the matching of the feeding speed and the rotating speed, and the selection of the granularity of the grinding wheel, thereby facilitating the verification of the machining precision and the machining correction.

The profile tolerance is used for describing the dimensional accuracy of the curved surface, and the main index is a profile tolerance error which refers to the variation condition of the measured actual profile relative to the ideal profile. In one embodiment, the controller is used for controlling the rotation speed and the feeding of the milling cutter in the milling process of the milling cutter. Preferably, in one embodiment, the milling cutter is ground by a high-speed low-feed method. The grinding process adopts a high-rotating-speed low-feeding mode as far as possible, the grinding wheel must be trimmed on line, and the vibration is suppressed to the lowest, so that the profile tolerance is controlled within +/-0.001 mm, the precision target and the target effect can be achieved without multiple processing, and the yield of the milling cutter are improved.

In light of the foregoing description of the preferred embodiments according to the present application, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present application is not limited to the contents of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a CBN round nose milling cutter that hardens entirely with design of negative chamfer which characterized in that, includes rake face, back knife face, blade, rake face and back knife face meet, the blade is formed in rake face and back knife face department of meeting, milling cutter is the cubic boron nitride blade, blade department grinds out 0.1-0.15 mm's width negative chamfer.

2. The CBN full hard round nose milling cutter with negative chamfer design according to claim 1, characterized in that the rake face forms a rake angle with the machining face, the rake angle being 25-35 °.

3. The CBN full hard round nose milling cutter with negative chamfer design according to claim 2, characterized in that the rake angle is 30 °.

4. The CBN full hard round nose milling cutter with negative chamfer design according to claim 1, wherein the milling cutter is ground by a grinding wheel during grinding, the grinding wheel comprises a high gloss grinding wheel, and the negative chamfer is ground by the high gloss grinding wheel.

5. The CBN full hard round nose milling cutter with negative chamfer design according to claim 4, wherein the rake face and the flank face are both ground by the high gloss grinding wheel.

6. The CBN full hard round nose milling cutter with the negative chamfer design as claimed in claim 4, wherein a controller is adopted to control the grinding wheel during the milling process of the milling cutter, and the controller controls the grinding wheel to rotate in real time during the grinding process of the grinding wheel.

7. The CBN full hard round nose milling cutter with negative chamfer design according to claim 4, characterized in that a controller is used to control the milling cutter rotation speed and feed during milling of the milling cutter.

8. The CBN full hard round nose milling cutter with negative chamfer design according to claim 7, characterized in that the milling cutter is ground with high rotational speed and low feed.