CN109773437A

CN109773437A - A kind of processing technology of drill

Info

Publication number: CN109773437A
Application number: CN201910234466.0A
Authority: CN
Inventors: 王广银
Original assignee: Danyang Danying Tool Manufacturing Co Ltd
Current assignee: Danyang Danying Tool Manufacturing Co Ltd
Priority date: 2019-03-26
Filing date: 2019-03-26
Publication date: 2019-05-21

Abstract

The invention discloses a kind of processing technologys of drill, including blanking, corase grinding outer circle, for the first time rolling, half fine cylindrical, second of rolling, heat treatment, fine cylindrical, grinding spiral groove and put the first edge on a knife or a pair of scissors, two symmetrical helicla flutes are wherein processed on blank in rolling for the first time, and stay 50-80 surpluses in the unilateral of helicla flute；Two symmetrical helicla flutes are processed on blank in rolling for the first time, and stay 15-25 surpluses in the unilateral of helicla flute；Then through fine cylindrical and using outer circle as benchmark grinding spiral groove in place, using twice rolling plus grinding operation, can prepare excellent cutting performance faster rolls mill fluted drill.

Description

A kind of processing technology of drill

Technical field

The present invention relates to a kind of processing technologys of drill.

Background technique

Fluted drill is the rotary cutting by its relatively fixed axis with the tool of the circular hole of drilling workpiece.Because of its chip pocket It is spiral and be similar to fried dough twist and gain the name.It is such fried dough twist through rolled spiral drill that existing domestic fluted drill, which more has 60% or more, It is drilled to that type is fast, good physical performance, but disadvantage is also obvious, i.e. fluted drill spiral groove surface is coarse, influences to consider to be worth doing out, helicla flute Cross-sectional geometry is poor, precision is low, and the symmetry of two helicla flutes is usually scrapped because standard is not achieved, and is only used for coarse hole Processing.

In view of the above problems, solution relatively broad at this stage is to be commonly called as using the production method ground afterwards is first rolled Roll ditch mill back technology, the essence of this method is by chip pocket and knife spine all using processing by the way of being ground in place, to solve Certainly rolling is bored the problem of being easily broken off, but the fluted drill produced lose after rolling physical property uniformly, interior tissue has Fiber continuity and the advantage that crystal grain refinement, distribution of carbides are uniform, red hardness is high, and the stock removal of subsequent helicla flute is often It is larger, it be easy to cause later process to take a long time, so as to cause the overall processing time compared with complete wear is bored, is not much different, and fiber crops Flower bores quality and also cannot effectively be promoted.

Summary of the invention

The purpose of the present invention is to solve the above the deficiencies in the prior art, provide a kind of processing technology of drill.

A kind of processing technology of drill, comprising the following steps:

1) blanking: carrying out batch line to more bars with fast wire winding and cut, and line is polished the end of blank with hand mill after cutting；

2) it roughly grinds outer circle: using centreless grinding, blank is ground, the oxide layer of blank surface is removed；

3) it rolls for the first time: using hot-rolling mill, pre-rolling is carried out to blank, processes two symmetrical helicla flutes, and Unilateral in helicla flute stays 50-80 surpluses；

4) half fine cylindrical: it is ground blank outer circle using peripheral milling, and there are surpluses；

5) it rolls for second: using hot-rolling mill, pre-rolling is carried out to blank, rolls helicla flute, and in the unilateral of helicla flute Stay 15-25 surpluses；

6) it is heat-treated: blank being heat-treated using salt bath furnace；

7) it fine cylindrical: using cutting fluid, is ground outside drill by the amount of feeding of 0.002-0.005mm Circle, until excircle dimension is in place；

8) grinding spiral groove: on the basis of outer circle, refining helicla flute, until helicla flute is of the required size；

9) it puts the first edge on a knife or a pair of scissors: processing of putting the first edge on a knife or a pair of scissors being carried out to drill using numerical control tapping machine, and drill finished product is made.

The clamping of centreless grinding head is inconvenient in order to prevent, further includes turning over sand paper removal blank both ends in the step 2) Burr.

It further include that deburring processing is carried out to drill using shot-blasting machine after step 8) to reduce surface spikes.

In order to which the antirust grade for enhancing surface hardness and promoted product further includes carrying out to drill after step 9) Electroplating surface.

It further include that drill is successively packaged, is carved characters and is sealed after step 9) in order to facilitate identifying and selling Dress.

The utility model has the advantages that

1, using the manufacture craft ground afterwards is first rolled, compared with traditional compacting is bored, structural stability is more preferable, also reduces The difficulty of rolling mill practice, and improve the service life of drill bit；With it is traditional grind brill compared with, process time greatly contracts It is short, the product in batch can be processed in a relatively short period of time.

2, first with pre-rolling that drill bit is preforming in place by the way of secondary rolling, then half fine ginding is carried out to foreign round, The unilateral surplus of helicla flute can be controlled well when rolling for second at 15-25 or so, to facilitate subsequent mill It cuts, and reduces grinding time-consuming, to improve the yield in unit time of product.

Specific embodiment

In order to deepen the understanding of the present invention, the present invention will be described in further detail with reference to the examples below, the embodiment For explaining only the invention, it is not intended to limit the scope of the present invention..

A kind of processing technology of drill, comprising the following steps:

2) it roughly grinds outer circle: using centreless grinding, blank is ground, removes the oxide layer of blank surface, then gone with sand paper Except the flanging burr at blank both ends；

6) it is heat-treated: blank being heat-treated using salt bath furnace；

8) grinding spiral groove: on the basis of outer circle, helicla flute is refined, until helicla flute is of the required size, then uses ball blast Machine carries out deburring processing to drill；

9) it puts the first edge on a knife or a pair of scissors: processing of putting the first edge on a knife or a pair of scissors being carried out to drill using numerical control tapping machine, and drill finished product is made；

10) it is electroplated: electroplating surface is carried out to drill；

11) drill is successively packaged, is carved characters and is encapsulated.

The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.

Claims

1. a kind of processing technology of drill, which comprises the following steps:

3) it rolls for the first time: using hot-rolling mill, pre-rolling is carried out to blank, processes two symmetrical helicla flutes, and in spiral shell The unilateral of spin slot stays 50-80 surpluses；

5) it rolls for second: using hot-rolling mill, pre-rolling is carried out to blank, rolls helicla flute, and stay 15- in the unilateral of helicla flute 25 surpluses；

6) it is heat-treated: blank being heat-treated using salt bath furnace；

7) fine cylindrical: using cutting fluid, it is ground drill outer circle by the amount of feeding of 0.002-0.005mm, directly In place to excircle dimension；

2. a kind of processing technology of drill according to claim 1, which is characterized in that in the step 2), further include With the flanging burr at sand paper removal blank both ends.

3. a kind of processing technology of drill according to claim 1, which is characterized in that after step 8), further include Deburring processing is carried out to drill using shot-blasting machine.

4. a kind of processing technology of drill according to claim 1, which is characterized in that after step 9), further include Electroplating surface is carried out to drill.

5. a kind of processing technology of drill according to claim 1, which is characterized in that after step 9), further include Drill is successively packaged, is carved characters and is encapsulated.