CN215145014U

CN215145014U - Double-groove structure composite reaming drill

Info

Publication number: CN215145014U
Application number: CN202121393993.5U
Authority: CN
Inventors: 马锡庆; 邱威宇
Original assignee: Yuantao Changzhou Precision Cutting Technology Co ltd
Current assignee: Yuantao Changzhou Precision Cutting Technology Co ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2021-12-14
Anticipated expiration: 2031-06-22

Abstract

The utility model relates to a compound ream of double flute structure, including cutting portion and stalk portion, the end face center protrusion of cutting portion is formed with a drill point, certainly the drill point radially extends two planar drill point back knife face to cutting portion, is equipped with spiral chip groove and back of a knife blade on the outer peripheral face of cutting portion, the chip groove includes axial rake face and radial rake face, the axial rake face is connected drill point back knife face and is formed main cutting edge, radial rake face is connected the back of a knife blade and is formed vice cutting edge, and every vice cutting edge has three margins, forms a pair chip groove between two liang of margins. The utility model has the drill bit capability and the reaming capability; the cutting part carries out the design of main vice groove multiple-margin, reduces margin width through vice chip groove, has reaming ability and high stable supporting effect concurrently, has compromise the high life when guaranteeing the high accuracy.

Description

Double-groove structure composite reaming drill

Technical Field

The utility model belongs to the technical field of the metal cutting processing technique and specifically relates to a compound ream of double flute structure bores.

Background

At present, in order to ensure high-pressure injection and accurate flow control, a high-pressure common rail system has high precision of each component, the control of each clearance is quite strict, the straightness of part is less than 0.8 micron, the clearance of a matching part is 1.5-3.7 microns, and special working conditions such as inclined plane holes and cross holes exist, so that high requirements are provided for the precision and the service life of drill bit machining. The existing drill bit on the market has short service life and poor machining precision, and the drill bit is broken in a workpiece due to punching deflection, so that the workpiece is directly scrapped, which is a difficult machining problem difficult to solve in the industry.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: overcomes the defects in the prior art and provides a composite reaming drill with a double-groove structure.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a compound ream of double flute structure, includes cutting portion and stalk portion, the end face center protrusion of cutting portion is formed with a drill point, certainly the drill point radially extends two planar drill point back knife face to cutting portion, is equipped with spiral chip groove and back of a knife blade on the outer peripheral face of cutting portion, the chip groove includes axial rake face and radial rake face, axial rake face connects behind the drill point knife face and forms main cutting edge, radial rake face connects the back of a knife blade and forms vice cutting edge, and every vice cutting edge has three bandlets, forms a pair chip groove between two liang of bandlets.

Each secondary cutting edge is provided with three cutting edges, and a plurality of cutting edges form a plurality of point supports, so that the stability during drilling can be greatly improved through the multi-point supports, the high precision of the hole is ensured, and the multi-point support has more advantages particularly in the processing of cross holes and through holes; a pair of chip removal grooves are formed between every two blade zones, so that the chip removal grooves have cooling and chip removal effects, and even if deep holes are machined on externally cooled equipment, the coolant can be ensured to fully flow to a cutting part and smoothly remove chips.

In order to ensure the drill capability, it is further defined that the taper angle of the drill tip is 145 °.

Further, the chip groove is a right spiral chip groove, and the spiral angle of any point on the chip groove is 30 degrees.

So set up, dispersion cutting resistance that can be better to have stronger chip-breaking function, effectual reduction cutting resistance makes cutting process light and fast more, has improved the antidetonation and the resistance to wear of cutter, can carry out high-speed processing and high efficiency cutting.

Further defined, the land is provided with a planar relief angle.

So set up, can reduce or offset because of many margins support the problem that the radial cutting that leads to resists the increase, produce the reaming ability that radial relief angle has had vice sword concurrently simultaneously, guarantee can not appear punching crooked when business turn over hole, the poor problem of hole circularity has improved the smooth finish of pore wall.

Further defined, the shank is an elongated grippable cylindrical shank.

So set up, improved the centre gripping rigidity greatly, guaranteed the reaming life-span.

In order to ensure the rigidity of the reaming drill, the cutting part and the handle part are further defined to be integrally machined by hard alloy.

The utility model has the advantages that: the utility model has the drill bit capability and the reaming capability; the cutting part carries out the design of main vice groove multiple-margin, reduces margin width through vice chip groove, has reaming ability and high stable supporting effect concurrently, has compromise the high life when guaranteeing the high accuracy.

Drawings

The present invention will be further described with reference to the accompanying drawings and embodiments.

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a left-view enlarged schematic view of fig. 1.

In the figure: 1. the cutting tool comprises a cutting part, 2, a handle part, 11, a drill tip, 12, a drill tip rear tool face, 13, a chip groove, 14, a tool back, 15, a blade zone and 16, an auxiliary chip groove.

Detailed Description

The invention will now be further described with reference to the accompanying drawings. The drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.

As shown in fig. 1 and 2, a double-flute composite reaming drill includes a cutting portion 1 and a shank portion 2, a drill tip 11 is formed at the center of the end face of the cutting portion 1 in a protruding manner, two planar drill tip rear tool faces 12 extend from the drill tip 11 to the cutting portion 1 in the radial direction, a spiral chip discharge groove 13 and a back 14 are formed on the outer peripheral face of the cutting portion 1, the chip discharge groove 13 includes an axial front tool face and a radial front tool face, the axial front tool face is connected with the drill tip 11 rear tool face to form a main cutting edge, the radial front tool face is connected with the back 14 to form a secondary cutting edge, each secondary cutting edge has three lands 15, and a secondary chip discharge groove 16 is formed between every two lands 15.

In this embodiment, the taper angle of the drill tip 11 is 145 °. The chip groove 16 is a right spiral chip groove, and the spiral angle of any point on the chip groove 16 is 30 degrees. The land 15 is provided with a planar relief angle. The handle part 2 is an elongated cylindrical tool handle capable of being clamped. The cutting portion 1 and the shank portion 2 are integrally formed of cemented carbide.

Through multiple verification, compared with the traditional drill bit with the service life of 50m (the service life of the drill bit, namely the thickness of the bottom layer drilled by the drill bit until the drill bit is worn, and the unit of meter), the double-groove structure composite reaming drill can stably drill holes of 75m, the straightness of the holes is within 2 microns, the smoothness reaches Ra0.8, the service life of the whole reaming drill is prolonged by about 50%, and the cost is greatly saved.

The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose thereof is to enable people skilled in the art to understand the contents of the present invention and implement the present invention, and the protection scope of the present invention can not be limited thereby, and all equivalent changes or modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.

Claims

1. The utility model provides a compound reaming of double flute structure bores which characterized in that: including cutting portion and stalk portion, the end face center protrusion of cutting portion is formed with a drill point, certainly the drill point radially extends two planar drill point back tool face to cutting portion, is equipped with spiral chip groove and back of a knife blade on the outer peripheral face of cutting portion, the chip groove includes axial rake face and radial rake face, the axial rake face is connected drill point back tool face and is formed main cutting edge, radial rake face is connected the back of a knife blade and is formed vice cutting edge, and every vice cutting edge has three margins, forms a pair chip groove between two liang of margins.

2. The double-flute structured composite reamer of claim 1, wherein: the cone angle of the drill tip is 145 °.

3. The double-flute structured composite reamer of claim 1, wherein: the chip groove is a right spiral chip groove, and the spiral angle of any point on the chip groove is 30 degrees.

4. The double-flute structured composite reamer of claim 1, wherein: the land is provided with a planar relief angle.

5. The double-flute structured composite reamer of claim 1, wherein: the handle part is an elongated cylindrical tool handle capable of being clamped.

6. The double-flute structured composite reamer of claim 1, wherein: the cutting part and the handle part are integrally processed by hard alloy.