CN105108204A - Method for processing special deep holes - Google Patents

Method for processing special deep holes Download PDF

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Publication number
CN105108204A
CN105108204A CN201510584146.XA CN201510584146A CN105108204A CN 105108204 A CN105108204 A CN 105108204A CN 201510584146 A CN201510584146 A CN 201510584146A CN 105108204 A CN105108204 A CN 105108204A
Authority
CN
China
Prior art keywords
drill bit
length
processing
hole
holes
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201510584146.XA
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Chinese (zh)
Inventor
孙鹏
高美娜
王韧强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shenyang Aircraft Industry Group Co Ltd
Original Assignee
Shenyang Aircraft Industry Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shenyang Aircraft Industry Group Co Ltd filed Critical Shenyang Aircraft Industry Group Co Ltd
Priority to CN201510584146.XA priority Critical patent/CN105108204A/en
Publication of CN105108204A publication Critical patent/CN105108204A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23BTURNING; BORING
    • B23B41/00Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
    • B23B41/02Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor for boring deep holes; Trepanning, e.g. of gun or rifle barrels

Abstract

The invention discloses a method for processing special deep holes. The method comprises the following steps: (1) determining the lengths of fine holes to be processed; (2) preparing more than or equal to 4four ordinary drill bits, in which the diameters of the drill bits is are equal to that of holes to be processed, the lengths of the drill bits isare increased in sequence, and the length of the longest drill bit is greater than the depth of the holes to be processed; (3) processing the drill bits; and (4) processing the holes to be processed in sequence by using the drill bits with the lengths from small to large. Through the method, appropriate tools are used for processing the deep holes with high processing requirements; the excellent economic benefit is brought to the single-piece small-batch production with lack of special processing equipment; the accuracy requirements of the processed holes can be ensured; the technical problems that the processing cost is increased by the additionally-arranged special cutters and the process requirements cannot be met by ordinary cutters in the prior art can be solved.

Description

A kind of processing method of special deep hole
Technical field
The present invention relates to a kind of processing method of special deep hole, belong to mechanical manufacturing field.
Background technology
Machinery manufacturing industry is the mainstay of the national economy, and hole machined is again the important branch of in machine-building, its wherein deep hole machining account for again 40% of hole machined.In aircraft manufacturing field, 5mm is limited to when processing a diameter in needs high-strength stainless steel material, and the degree of depth is when being greater than the special deep hole of 170mm, due to this hole store precision and Geometrical Tolerance Principle strict, increase auxiliary equipment and special tool add trade union's raising and add cost, are not increasing the precision and the stability that are difficult to ensure deep hole machining under the prerequisite adding auxiliary equipment and special tool by existing hole forming method.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of processing method of special deep hole, first prepare many diameter to be equaled for machining hole diameter, and length increase successively many drill bit, again drill bit being processed, make the requirement of drill bit blade combination process, from being short to the long drill bit that uses, hole being processed successively afterwards, solve the increase special tool existed in prior art and can increase processing cost, use universal cutter can not meet the technical problem of technological requirement.
To achieve these goals, the technical solution used in the present invention is: a kind of processing method of special deep hole, is characterized in that:
1), determine to process this pore length;
2), prepare to be more than or equal to the normal drill bit of 4, the diameter of drill bit equals the diameter for machining hole, and the length of drill bit increases successively, and the length of most long drill bit is more than or equal to the degree of depth for machining hole, and it is dark that the length of all the other drill bits is less than for machining hole;
3), machining drill bit:
3a), main cut reconditioning place second sharp angle on cutting edge, its number of degrees are less than or equal to 75 °;
3b), grind out the excessive sword of circular arc of both sides R0.2-0.5 at outer rim nose angle place, roughness reaches below Ra0.4um, and two excessive blades are symmetrical, highly unanimously;
3c), by narrow for seamed edge mill in front end, only retain the width of 0.1-0.2m, reconditioning length is 4-5mm;
3d), reconditioning front cutting edge, rake face and rear knife face, make its various piece fineness at below Ra0.4um;
4), use length drill bit from small to large, process successively for machining hole.
The beneficial effect of the invention is: the invention provides a kind of processing method of special deep hole, first prepare many diameter to be equaled for machining hole diameter, and length increase successively many drill bit, again drill bit is processed, making the requirement of drill bit blade combination process, from being short to the long drill bit that uses, hole being processed successively afterwards.The present invention passes through said method, adopt proper implements, the deep hole higher to requirement on machining accuracy is processed, good economic benefit is had to shortage special processing equipment or Single unit job lot production, and the required precision of machining hole can be ensured, solve the increase special tool existed in prior art and can increase processing cost, use universal cutter can not meet the technical problem of technological requirement.
Detailed description of the invention
A processing method for special deep hole, the steps include:
1), determine to process this pore length;
2), prepare to be more than or equal to the normal drill bit of 4, the diameter of drill bit equals the diameter for machining hole, and the length of drill bit increases successively, and the length of most long drill bit is more than or equal to the degree of depth for machining hole, and it is dark that the length of all the other drill bits is less than for machining hole;
3), machining drill bit:
3a), main cut reconditioning place second sharp angle on cutting edge, its number of degrees are less than or equal to 75 °;
3b), grind out the excessive sword of circular arc of both sides R0.2-0.5 at outer rim nose angle place, roughness reaches below Ra0.4um, and two excessive blades are symmetrical, highly unanimously;
3c), by narrow for seamed edge mill in front end, only retain the width of 0.1-0.2m, reconditioning length is 4-5mm;
3d), reconditioning front cutting edge, rake face and rear knife face, make its various piece fineness at below Ra0.4um;
4), use length drill bit from small to large, process successively for machining hole.
During deep hole machining, the most scabrous problem is exactly chip removal problem.Be in closed state during deep hole machining, operator directly can not observe cutting and the wear condition of cutter, and cooling-lubricant not easily enters cutting zone, and heat in metal cutting is not easily fallen apart to unofficial biography, and cutting temperature will increase.If chip removal situation is bad, just makes cutting temperature raise too fast, be easy to make drill bit jammed.If chip removal method in adopting, cooling-lubricant is flowed into from drilling rod cylindrical and workpiece hole wall gap, discharge together with chip at drilling rod center, so drilling rod external diameter will increase (hole size must reach in more than 16) although the rigidity of cutter is strengthened, cooling chip removal effect is also better, but lathe device accumulator and fluid-tight also must must set up a set of liquid-supplying system.Obviously, from cost aspect and applicability aspect not very good.If adopt external chip discharging method, cooling-lubricant is flowed into from drilling rod center, discharged together with chip by the gap between drilling rod with hole wall, although do not need special purpose machine tool and Special assisting tool, burr and chip clearance and chip space are also larger, but need to customize special drilling rod, add processing cost.When there is no special cutter and corresponding necessary equipment, realize processing tasks smoothly.
Specific embodiments is as follows:
(1) determine processes strategy: due to the particularity of deep hole, the operation determining this hole of processing is important procedure, likely meets accident in this operation, therefore, when formulating technological principle, we determine first to process this elongated hole, and then operation after carrying out, risk is dropped to minimum.
(2) preparation of cutting element: when deep hole processing, need in principle to adopt special deep hole tools, special deep hole tools will there be guiding measure and device, to improve the rigidity of cutter, ensure drill bit guiding problem at work, under the prerequisite not having special deep hole tools, as: need processing diameter to be 4mm, the degree of depth is the deep hole of 187.5mm, 4 can be adopted to be 4mm diameter, length is respectively the normal drill bit of 50mm, 90mm, 140mm, 190mm, along with the increase of machining hole length, can increase the number using drill bit as required.
(3) determination of drill sharpening parameter: because dimension precision requirement is higher, so the sharpening of drill bit is extremely important, bit grinding obtain OK directly affect dimensional accuracy and the surface roughness of last fraising, therefore, special process to be done to the sharpening of drill bit, namely improve the geometric parameter of drill bit.One is that reconditioning goes out the second sharp angle on two main cutting edges, generally be no more than 75, and the excessive sword of circular arc of R0.2 ~ 0.5, both sides is ground out at outer rim nose angle place, roughness reaches below Ra0.4um, and two excessive swords are symmetrical, highly unanimously, to increase intensity and the abrasion resistance at point of a knife outer rim place, improve radiating condition, reduce the revolution mark height of hole wall.Two is that only retain the width of 0.1 ~ 0.2mm, reconditioning length is 4 ~ 5mm, to reduce the friction of seamed edge and hole wall by narrow for seamed edge mill in front end.Three is reconditioning front cutting edge, rake face and rear knife face, requires that, with the grinding of more than 320# oilstone, best more than 400#, grinds each position fineness and reach Ra0.4 ~ Ra0.2um and following.
(4) enforcement of processing scheme.The shortest drill bit is first utilized to process this elongated hole, after reaching certain length, change the short drill bit of length second successively and continue processing, like this, the hole processed by the shortest drill bit can become the locating hole of the short drill bit of length second, the like, like this, drill bit can not make drill bit depart from center when processing this hole, serves the effect eliminating deviation, thus ensures linearity and the machining accuracy in hole.

Claims (1)

1. a processing method for special deep hole, is characterized in that:
1), determine to process this pore length;
2), prepare to be more than or equal to the normal drill bit of 4, the diameter of drill bit equals the diameter for machining hole, and the length of drill bit increases successively, and the length of most long drill bit is more than or equal to the degree of depth for machining hole, and it is dark that the length of all the other drill bits is less than for machining hole;
3), machining drill bit:
3a), main cut reconditioning place second sharp angle on cutting edge, its number of degrees are less than or equal to 75 °;
3b), grind out the excessive sword of circular arc of both sides R0.2-0.5 at outer rim nose angle place, roughness reaches below Ra0.4um, and two excessive blades are symmetrical, highly unanimously;
3c), by narrow for seamed edge mill in front end, only retain the width of 0.1-0.2m, reconditioning length is 4-5mm;
3d), reconditioning front cutting edge, rake face and rear knife face, make its various piece fineness at below Ra0.2um;
4), use length drill bit from small to large, process successively for machining hole.
CN201510584146.XA 2015-09-15 2015-09-15 Method for processing special deep holes Pending CN105108204A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201510584146.XA CN105108204A (en) 2015-09-15 2015-09-15 Method for processing special deep holes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201510584146.XA CN105108204A (en) 2015-09-15 2015-09-15 Method for processing special deep holes

Publications (1)

Publication Number Publication Date
CN105108204A true CN105108204A (en) 2015-12-02

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Family Applications (1)

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CN201510584146.XA Pending CN105108204A (en) 2015-09-15 2015-09-15 Method for processing special deep holes

Country Status (1)

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CN (1) CN105108204A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107900616A (en) * 2017-11-14 2018-04-13 珠海市魅族科技有限公司 The processing method and terminal in terminal horn hole

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1268417A (en) * 1999-03-24 2000-10-04 叶小宁 Processing method of superlong precision deep bore and its equipment
CN201295783Y (en) * 2008-08-14 2009-08-26 句容市昌明齿轮制造有限公司 Special lengthened drill bit for processing parallel macroaxis hole
JP2011056603A (en) * 2009-09-08 2011-03-24 Toshiba Mach Co Ltd Method and device for machining deep hole
CN103286339A (en) * 2013-06-18 2013-09-11 哈电集团(秦皇岛)重型装备有限公司 Method and device for machining deep holes through boring miller

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1268417A (en) * 1999-03-24 2000-10-04 叶小宁 Processing method of superlong precision deep bore and its equipment
CN201295783Y (en) * 2008-08-14 2009-08-26 句容市昌明齿轮制造有限公司 Special lengthened drill bit for processing parallel macroaxis hole
JP2011056603A (en) * 2009-09-08 2011-03-24 Toshiba Mach Co Ltd Method and device for machining deep hole
CN103286339A (en) * 2013-06-18 2013-09-11 哈电集团(秦皇岛)重型装备有限公司 Method and device for machining deep holes through boring miller

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
彭海: "钛合金及高温合金的小直径深孔加工", 《新技术新工艺》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107900616A (en) * 2017-11-14 2018-04-13 珠海市魅族科技有限公司 The processing method and terminal in terminal horn hole

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Application publication date: 20151202