CN108994351A - Switchable drill bit depth drill, processing method and application - Google Patents
Switchable drill bit depth drill, processing method and application Download PDFInfo
- Publication number
- CN108994351A CN108994351A CN201810923678.5A CN201810923678A CN108994351A CN 108994351 A CN108994351 A CN 108994351A CN 201810923678 A CN201810923678 A CN 201810923678A CN 108994351 A CN108994351 A CN 108994351A
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- drill bit
- drill
- drilling rod
- switchable
- rod
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B35/00—Methods for boring or drilling, or for working essentially requiring the use of boring or drilling machines; Use of auxiliary equipment in connection with such methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B41/00—Boring or drilling machines or devices specially adapted for particular work; Accessories specially adapted therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/009—Stepped drills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/02—Connections between shanks and removable cutting heads
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/04—Drills for trepanning
- B23B51/0411—Drills for trepanning with stepped tubular cutting bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/06—Drills with lubricating or cooling equipment
- B23B51/063—Deep hole drills, e.g. ejector drills
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of switchable drill bit depth drill, processing method and applications, switchable drill bit depth drill is greater than 15 for draw ratio and wall thickness is less than the deep hole machining with the level of 5mm, including drilling rod, the drill bit assembly side of drilling rod is equipped with for guiding drill bit along the exchanging structure for being fitted axially on drilling rod and adapting to different radial dimension drill bit switching assembly, and drill bit is assemblied on drilling rod by exchanging structure and is rotated coaxially with drilling rod.The exchanging structure that the drill bit assembly side of drilling rod is equipped with, which can transfer, assembles different radial dimension drill bits, no replacement is required drilling rod, whole use drilling rod matched with major diameter drill bit, substantially reduces the probability that drilling rod blocks, it is high in machining efficiency and without repeating to do the preparation for replacing drilling rod.
Description
Technical field
The present invention relates to field of aerospace fields, particularly, are related to a kind of switchable drill bit depth drill.In addition, this hair
It is bright to further relate to a kind of processing method and application including above-mentioned switchable drill bit depth drill.
Background technique
Depth drill is a kind of technology for being widely used in machinery manufacturing industry, especially aerospace manufacturing industry, the field
The longaxones parts being related to are higher and higher to the requirement of depth drill technical level, especially the thin-wall long and thin axis class zero with stepped hole
Part.Such general draw ratio of part is greater than 15, and wall thickness is generally in 5mm hereinafter, poor rigidity, to the chip removal in depth drill processing, knife
Tool service life, equipment requirement are extremely harsh.It is general to be added again using first machining small when using depth drill technology processing step hole at present
The method of work macropore needs the radial dimension of drill bit of two correspondences and drilling rod, and is equipped with the guidance mutually fitted therewith, and process needs
Preparation twice is done, especially in difficult processing chip breaking material, during machining small, drilling rod easily causes to bore since aperture is small
Bar blocking easily forms tiny step on inner bore of part surface, it is difficult to protect if continuing to process after the iron filings gathered in cleaning finishing drilling bar
Wall-Thickness Difference requirement is demonstrate,proved, and processing efficiency is low, is badly in need of a kind of new switchable drill bit depth drill processing method.
Summary of the invention
The present invention provides a kind of switchable drill bit depth drill, processing method and applications, to solve depth drill processing step
Kong Shi needs the radial dimension of drill bit of two correspondences and drilling rod, and processing efficiency is low and the drilling rod of small-bore holds susceptible to plugging skill
Art problem.
The technical solution adopted by the invention is as follows:
A kind of depth drill of switchable drill bit is greater than 15 for draw ratio and with the level deep hole of the wall thickness less than 5mm adds
Work, including drilling rod, the drill bit assembly side of drilling rod are equipped with for guiding drill bit edge to be fitted axially on drilling rod and adapting to different diameters
To the exchanging structure of the switching assembly of the drill bit of size, drill bit is assemblied on drilling rod by exchanging structure and is coaxially turned with drilling rod
It is dynamic.
Further, exchanging structure include for along axial assembly Small-diameter drill adapting rod, for turning along axial assembly
Extension bar simultaneously carries out in axially directed guiding bar and drill bit assembly side in drilling rod for filling along axial grafting in deep hole
Pilot hole with major diameter drill bit or guiding bar.
Further, between drill bit and adapting rod, between adapting rod and guiding bar, between guiding bar and pilot hole, drill bit
In between pilot hole at least one at connect using at least one of bolt, slot, grafting block or voussoir connection type；It bores
Between head and adapting rod, between adapting rod and guiding bar, between guiding bar and pilot hole, between drill bit and pilot hole at least
Using at least one of Multi-contact transmission, line Contact Transmission or face contact transmission at one；Alternatively, drill bit and adapting rod it
Between, between adapting rod and guiding bar, between guiding bar and pilot hole, between drill bit and pilot hole at least one at use screw thread
It is connected with locating part；Screw thread ridge orientation is consistent with transmission direction, to guarantee drill bit and drilling rod coaxial transmission and prevent adapting rod
It falls off with guiding bar.
Further, adapting rod uses high strength steel or high-temperature alloy steel；Switching pole length is 200mm~400mm；Switching
Bar is suitable for processing step blind hole of the draw ratio less than 25.
Further, at least one of cross section of the cross section of drilling rod, the cross section of drill bit or adapting rod is using inclined
Heart circular shape；Drilling rod end is equipped with for reducing the shock-absorbing sleeve for generating vibration in drill bit process；Adapting rod outside wall surface and/
Or inner wall is equipped with the reinforcement convex ribs for axially and/or circumferentially laying along adapting rod and be used to reinforce adapting rod intensity.
According to another aspect of the present invention, a kind of processing method of switchable drill bit depth drill is additionally provided, including following
Step: major diameter drill bit is connect with drilling rod, the process and assemble hole in the drill bit assembly side of drilling rod, major diameter drill bit is fixed with pilot hole
Connection；Macropore in processing step hole is worked into macropore designated length, exits major diameter drill bit；Major diameter drill bit is torn open from drilling rod
It unloads down；Small-diameter drill is connect with guiding bar, processes the first guide hole of guiding bar；By the first of Small-diameter drill and adapting rod
Free end connection, processes the second guide hole of adapting rod, and the second free end of the first guide hole and adapting rod is connected, and processing turns
The female part of extension bar；Small-diameter drill and guiding piece are linked into an integrated entity by adapting rod, then are fixedly connected with pilot hole, machine table
Aperture in rank hole；It is worked into aperture designated length, exits Small-diameter drill, completes step hole machined.
Further, the absolute depth of the aperture in switchable drill bit depth drill processing step hole is 400mm~600mm；
The absolute depth of macropore in switchable drill bit depth drill processing step hole is 300mm~500mm.
Further, the radial dimension of adapting rod is 5mm~20mm, and the wall thickness of adapting rod is 2mm~3mm；Major diameter drill bit
Radial dimension be 20mm~50mm；The radial dimension of Small-diameter drill is 5mm~20mm.
Further, the surface roughness in switchable drill bit depth drill processing hole is less than 3.2；Switchable drill bit depth drill adds
The straightness in work hole is less than 0.08mm.
According to another aspect of the present invention, a kind of switchable drill bit depth drill answering in aerospace manufacture is additionally provided
With.
The invention has the following advantages:
The depth drill of switchable drill bit of the invention is greater than 15 for draw ratio and wall thickness is less than the depth with the level of 5mm
Hole machined.The exchanging structure that the drill bit assembly side of drilling rod is equipped with, which can transfer, assembles different radial dimension drill bits, and no replacement is required bores
Bar, whole process use drilling rod matched with major diameter drill bit substantially reduce the probability of drilling rod blocking, and without repeating to make replacement drilling rod
Preparation, it is high in machining efficiency.Traditionally drill bit is matched on drilling rod, needs to meet drill bit 2mm's bigger than drilling rod radial dimension
It is required that the design of the exchanging structure of the deep hole of switchable drill bit, Small-diameter drill can be assembled bore in major diameter by exchanging structure
On bar, greatly reduce the expense of drill bit and drilling rod, saves cost.It is assembled between drilling rod, exchanging structure and drill bit using detachable,
Its structure is simple, easy to carry, and blocking probability is low, is suitable for difficult processing chip breaking material.
The processing method of the depth drill of switchable drill bit of the invention, the exchanging structure that the drill bit assembly side of drilling rod is equipped with can
Different radial dimension drill bits are assembled with switching, in processing step hole, can first process macropore reprocessing aperture can both be reduced
The stroke of depth drill, and no replacement is required drilling rod, upgrading synergy is obvious, breaches thin and long shafts part of the traditional processing with stepped hole
Process, and apply also for processing blind hole with the level.Also, the macropore in first processing step hole, macropore can be
The Small-diameter drill of machining small plays the role of guiding, and processing inner bore of part surface is avoided to form tiny step, effective to guarantee
Wall-Thickness Difference improves processing quality, reduces unnecessary error operation.The deep hole assembly of switchable drill bit is quick, process letter
It is single, it can gather materials on the spot at the construction field (site).Its is high in machining efficiency, no replacement is required drilling rod, reduces blocking probability.Switchable drill bit
The surface quality in the processing hole of depth drill reaches surface roughness 3.2 and the technique requirement of straightness 0.08mm.
Other than objects, features and advantages described above, there are also other objects, features and advantages by the present invention.
Below with reference to accompanying drawings, the present invention is described in further detail.
Detailed description of the invention
The attached drawing constituted part of this application is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the depth drill schematic diagram of the switchable drill bit of the preferred embodiment of the present invention；
Fig. 2 is the adapting rod schematic diagram of the preferred embodiment of the present invention；
Fig. 3 is the guiding bar schematic diagram of the preferred embodiment of the present invention；
Fig. 4 is the depth drill schematic diagram of the switchable drill bit with major diameter drill bit of the preferred embodiment of the present invention；And
Fig. 5 is the depth drill schematic diagram of the switchable drill bit with Small-diameter drill of the preferred embodiment of the present invention.
Description of symbols:
1, drilling rod；2, exchanging structure；21, adapting rod；22, guiding bar；23, pilot hole；211, the second guide hole；212, it holds
Interpolating unit；221, the first guide hole；3, major diameter drill bit；4, Small-diameter drill.
Specific embodiment
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Fig. 1 is the depth drill schematic diagram of the switchable drill bit of the preferred embodiment of the present invention；Fig. 2 is the preferred embodiment of the present invention
Adapting rod schematic diagram；Fig. 3 is the guiding bar schematic diagram of the preferred embodiment of the present invention；Fig. 4 is the band of the preferred embodiment of the present invention
There is the depth drill schematic diagram of the switchable drill bit of major diameter drill bit；Fig. 5 be the preferred embodiment of the present invention with Small-diameter drill can
The depth drill schematic diagram of switching drill bit.
As shown in Figure 1, the depth drill of the switchable drill bit of the present embodiment, is greater than 15 for draw ratio and wall thickness is less than 5mm
Deep hole machining with the level, including drilling rod 1, the drill bit assembly side of drilling rod 1 is equipped with for guiding drill bit along being fitted axially into brill
On bar 1 and the exchanging structure 2 that the switching of different radial dimension of drill bits is assembled is adapted to, drill bit is assemblied in by exchanging structure 2
It is rotated coaxially on drilling rod 1 and with drilling rod 1.The depth drill of switchable drill bit of the invention is greater than 15 for draw ratio and wall thickness is small
In the deep hole machining with the level of 5mm.The exchanging structure 2 that the drill bit assembly side of drilling rod 1 is equipped with, which can transfer, assembles different radial directions
Size drill bit, no replacement is required drilling rod 1, whole use drilling rod 1 matched with major diameter drill bit 3, substantially reduce drilling rod 1 block it is general
Rate, and without repeating to do the preparation for replacing drilling rod 1, it is high in machining efficiency.Traditionally drill bit is matched on drilling rod 1, is needed full
Requirement 2mm bigger than 1 radial dimension of drilling rod of sufficient drill bit, the design of the exchanging structure 2 of the deep hole of switchable drill bit can be by turning
Binding structure 2 assembles Small-diameter drill 4 on major diameter drilling rod 1, greatly reduces the expense of drill bit and drilling rod 1, saves cost.Drilling rod 1,
Using detachable assembly between exchanging structure 2 and drill bit, structure is simple, and easy to carry, blocking probability is low, is suitable for difficult processing
Chip breaking material.
As shown in Figure 1, Figure 4 and Figure 5, in the present embodiment, exchanging structure 2 includes for assembling Small-diameter drill 4 along axial
Adapting rod 21, for carrying out axially directed guiding bar 22 along axial assembly adapting rod 21 and in deep hole and in drilling rod 1
Drill bit assembly side on for assembling the pilot hole 23 of major diameter drill bit 3 or guiding bar 22 along axial grafting.Above-mentioned exchanging structure 2 wraps
Adapting rod 21, guiding bar 22 and pilot hole 23 are included, Small-diameter drill 4, adapting rod 21, guiding bar 22 and drilling rod 1 are sequentially connected and added
Aperture in work processing step hole, adapting rod 21 effectively reduce the length of drill bit and drilling rod 1, and saving drill bit makes with drilling rod 1
With material, cost is effectively reduced, and substantially reduces 1 blocking probability of drilling rod, it is high in machining efficiency without repeating replacement drilling rod 1.On
The tissue and stable mechanical performance for stating drilling rod 1 can keep the fastness of the faying face of drilling rod 1 and drill bit, absorb impact load
Ability is strong.
As shown in Figure 1, Figure 4 and Figure 5, in the present embodiment, between drill bit and adapting rod 21, adapting rod 21 and guiding bar 22 it
Between, use between guiding bar 22 and pilot hole 23, between drill bit and pilot hole 23 at least one at using bolt, slot, insert
Connect the connection of at least one of block or voussoir connection type.It is connected, will be acted on by bolt, slot, grafting block or voussoir mode
Power transmission.Optionally, between drill bit and adapting rod 21, between adapting rod 21 and guiding bar 22, guiding bar 22 and pilot hole 23 it
Between, between drill bit and pilot hole 23 at least one at using in Multi-contact transmission, line Contact Transmission or face contact transmission
It is at least one.Transmission effect can be increased using multipoint driving, line transmission or face transmission, and increased between each components
Contact area, so that uniform force, improves the stability of components.Optionally, using use between adapting rod 21 and guiding bar 22
In the scalable connection for adjusting drilling depth.Adjustable adapting rod 21 is relatively long between above-mentioned adapting rod 21 and guiding bar 22
Degree, to adapt to different processing requests,
Between above-mentioned drill bit and adapting rod 21, between adapting rod 21 and guiding bar 22, between guiding bar 22 and pilot hole 23,
In between drill bit and pilot hole 23 at least one at connected using screw thread and locating part.Screw thread ridge orientation and transmission direction one
It causes, to guarantee drill bit and 1 coaxial transmission of drilling rod and prevent adapting rod 21 and guiding bar 22 from falling off.The above-mentioned kind of drive uses screw thread
It is driven, and adjusts the relative length of adapting rod 21 by the way of limited block, increase the stability of screw-driven.Optionally,
Locating part is using at least one of limited block, positive stop strip or gag lever post.
As depicted in figs. 1 and 2, in the present embodiment, adapting rod 21 uses high strength steel or high-temperature alloy steel.Above-mentioned adapting rod
Drill bit is assembled on drilling rod 1 by exchanging structure 2 and is rotated coaxially with drilling rod 1 by 21 use, effective realize.By drilling rod 1
Torsional forces pass to drill bit and do work, and save drill bit and drilling rod 1.Adapting rod 21 uses high strength steel or high temperature alloy
Steel is the relatively conventional raw material in construction site, can take on the spot, interim processing is facilitated to use.And it is possible to save significantly
Save processing cost.Optionally, 21 length of adapting rod is 200mm~400mm.The length for selecting adapting rod 21 suitable, above-mentioned switching
It is thin walled bar that bar 21, which uses, the maximum driving torque and maximum load capacity that can be born according to adapting rod 21, suitable length model
It encloses for 200~400mm.Optionally, adapting rod 21 is suitable for processing step blind hole of the draw ratio less than 25.Above-mentioned adapting rod 21 is suitable
Wider with range, bigger suitable for processing major diameter, wall thickness is smaller, the poor thin-walled longaxones parts of rigidity.
As shown in Figure 1, Figure 4 and Figure 5, in the present embodiment, the cross section of drilling rod 1, the cross section of drill bit or adapting rod 21
At least one of cross section uses eccentric arc shape.The cross section of above-mentioned drilling rod 1, the cross section of drill bit or adapting rod 21
At least one of cross section uses eccentric arc shape, meets the requirement that deep hole turns processing, saves material, facilitates processing real
It applies.1 end of drilling rod is equipped with for reducing the shock-absorbing sleeve for generating vibration in drill bit process.Above-mentioned shock-absorbing sleeve has the work of shock-absorbing
With the stability of switchable drill bit depth drill in process can be improved.It is set on 21 outside wall surface of adapting rod and/or inner wall
There are the reinforcement convex ribs for axially and/or circumferentially laying along adapting rod 21 and be used to reinforce 21 intensity of adapting rod.Above-mentioned 21 knot of adapting rod
Structure span is larger, and the load that 21 wall surface of adapting rod can be born is limited, is equipped on 21 wall surface of adapting rod along axial along adapting rod 21
And/or the reinforcement convex ribs circumferentially laid, in the case where not increasing 21 wall thickness of adapting rod, increase adapting rod 21 intensity and just
Property, overcome the problems, such as that adapting rod 21 because of the deformation caused by wall thickness difference bring unbalanced stress, saves material, mitigates adapting rod
21 mass reduce cost, increase hardness and service life.
According to the another aspect of invention, a kind of processing method of switchable drill bit depth drill is also provided, comprising the following steps:
Major diameter drill bit 3 is connect with drilling rod 1, the process and assemble hole 23 in the drill bit assembly side of drilling rod 1, major diameter drill bit 3 and pilot hole 23
It is fixedly connected；Macropore in processing step hole is worked into macropore designated length, exits major diameter drill bit 3；By major diameter drill bit 3 from brill
It is disassembled on bar 1；Small-diameter drill 4 is connect with guiding bar 22, the first guide hole 221 of guiding bar 22 is processed, path is bored
First 4 connect with the first free end of adapting rod 21, process the second guide hole 211 of adapting rod 21, by the first guide hole 221 and turn
Second free end of extension bar 21 connects, and processes the female part 212 of adapting rod 21；It by Small-diameter drill 4 and is guided by adapting rod 21
Part links into an integrated entity, then is fixedly connected with pilot hole 23, and the aperture in processing step hole is worked into aperture designated length, exits
Small-diameter drill 4 completes step hole machined.The processing method of the depth drill of switchable drill bit of the invention, the drill bit assembly of drilling rod 1
It holds the exchanging structure 2 being equipped with that can transfer and assembles different radial dimension drill bits, in processing step hole, can first process macropore again
Machining small can not only reduce the stroke of depth drill, but also no replacement is required drilling rod 1, and upgrading synergy is obvious, breaches traditional processing band
The process of the thin and long shafts part of stepped hole, and apply also for processing blind hole with the level.Also, first processing step hole
In macropore, macropore can play the role of guiding for the Small-diameter drill 4 of machining small, processing inner bore of part surface is avoided to be formed
Tiny step effectively guarantees Wall-Thickness Difference, improves processing quality, reduces unnecessary error operation.The deep hole of switchable drill bit
Assembly is quick, and process is simple, can gather materials on the spot at the construction field (site).Its is high in machining efficiency, no replacement is required drilling rod 1, reduction
Blocking probability.The surface quality in the depth drill processing hole of switchable drill bit reaches surface roughness 3.2 and straightness 0.08mm
Technique requirement.
Above-mentioned major diameter drill bit 3 and Small-diameter drill 4 are a kind of opposite concept, indicate that exchanging structure 2 assembles different radial rulers
Very little drill bit, not unclear expression.
As shown in Figure 4 and Figure 5, in the present embodiment, the absolute depth of the aperture in switchable drill bit depth drill processing step hole
Degree is 400mm~600mm.The absolute depth of macropore in switchable drill bit depth drill processing step hole is 300mm~500mm.
Switchable drill bit depth drill working depth is longer, and the scope of application is wider, and is used between adapting rod 21 and guiding bar 22
Adjust the scalable connection of drilling depth.Cooperate the processing demand with the level of thin-walled longaxones parts to be processed, progress can
The adjusting for drill bit depth drill entire length of transferring.
Such as Fig. 1, as shown in Figure 4 and Figure 5, in the present embodiment, the radial dimension of adapting rod 21 is 5mm~20mm, adapting rod
21 wall thickness is 2mm~3mm.Above-mentioned adapting rod 21 uses thin-wall part, and radial dimension is that 5mm~20mm can be with the radial ruler of drill bit
It is very little identical, be conducive to transmit torque uniform stressed.The radial dimension of major diameter drill bit 3 is 20mm~50mm.The radial direction of Small-diameter drill 4
Having a size of 5mm~20mm.
As shown in Figure 4 and Figure 5, in the present embodiment, the surface roughness in switchable drill bit depth drill processing hole is less than 3.2.
The straightness in switchable drill bit depth drill processing hole is less than 0.08mm.Above-mentioned switchable drill bit depth drill uses identical drilling rod 1,
Different radial dimension drill bits are connected by exchanging structure 2, same drilling rod 1 is replaced without repeating, in processing step hole, Ke Yixian
Processing macropore reprocessing aperture can both reduce the stroke of depth drill, reduce Wall-Thickness Difference, reduce surface roughness, guarantee to be added
The machining accuracy of the thin-walled longaxones parts of work.
According to the another aspect of invention, a kind of application of switchable drill bit depth drill in aerospace manufacture is also provided.
The increase of whirlpool paddle and whirlpool shafting column engine model and the promotion of performance requirement, as its core driving parts-power long axis
Design structure feature also changes to the direction of multi-step hole, more diameter ranges, big L/D ratio.Switchable drill bit depth drill is adapted to
In processing thin-walled longaxones parts, the Wall-Thickness Difference of long shaft part is effectively controlled by exchanging structure 2, improves power long axis in height
Stability under fast rotary work state.
Preferred embodiment one
1, drill bit selects, and according to the size in power long axis stepped hole to be processed, determines the radial dimension of major diameter drill bit 3
Radial dimension with the radial dimension of Small-diameter drill 4, major diameter drill bit 3 is 25.8mm, and the radial dimension of Small-diameter drill 4 is
15.2mm。
2, the feed speed of process velocity, major diameter drill bit 3 turns for 0.14mm/, and the feed speed of Small-diameter drill 4 is
0.12mm/ turns, it is ensured that bits slag is smoothly discharged, and drilling rod 1 is avoided to block.
3, it positions, is marked in the centre bit point of power long axis stepped hole to be processed, it is ensured that the precision of bore position.
In the markers when heart site, it is ensured that the stepped hole of the vertical processing dynamics long axis of drill bit guarantees that bits slag is smoothly discharged and reduces power
The Wall-Thickness Difference of long axis.
4, major diameter drill bit 3 is connect by processing step hole with drilling rod 1, the absolute length of switchable drill bit depth drill processing macropore
Spending is 406mm, the process and assemble hole 23 in the drill bit assembly side of drilling rod 1, and major diameter drill bit 3 is threadedly coupled with pilot hole 23, is adjusted
Suitable revolving speed, the macropore in processing step hole, when major diameter 3 contact material of drill bit, first slowly feed, after piercing 1~2mm,
It is fed in normal speed, is worked into macropore designated length, exits major diameter drill bit 3；
Major diameter drill bit 3 is disassembled from drilling rod 1；
Small-diameter drill 4 is connect with guiding bar 22, guiding bar 22 is made of high strength steel, length 300mm, radial ruler
Very little is 12.94mm, wall thickness 2.32mm, processes the first guide hole 221 of guiding bar 22.By Small-diameter drill 4 and adapting rod 21
First free end is threadedly coupled, and processes the second guide hole 211 of adapting rod 21, by the of the first guide hole 221 and adapting rod 21
Two free ends are threadedly coupled, and process the female part 212 of adapting rod 21, and limited block is added to female part 212, long needed for adjusting
Degree；
Small-diameter drill 4 is linked into an integrated entity with guiding piece by adapting rod 21, then is threadedly coupled with pilot hole 23, it is switchable
The absolute growth of drill bit depth drill machining small is 440mm, the aperture in processing step hole, when 4 contact material of Small-diameter drill,
First slowly feed after piercing 1~2mm, is fed in normal speed, is worked into aperture designated length, exits Small-diameter drill 4, complete
Step hole machined.
5, drilling terminates, and stops operating, the bits slag on drill bit is understood.
Above-mentioned switchable drill bit depth drill process time is short, high in machining efficiency, and the surface roughness for processing hole is 3.2, adds
The straightness in work hole is 0.08mm.
Preferred embodiment two
1, drill bit selects, and according to the size in power long axis stepped hole to be processed, determines the radial dimension of major diameter drill bit 3
With the radial dimension of Small-diameter drill 4, the radial dimension of major diameter drill bit 3 is 40mm, and the radial dimension of Small-diameter drill 4 is 18mm.
2, the feed speed of process velocity, major diameter drill bit 3 turns for 0.15mm/, and the feed speed of Small-diameter drill 4 is
0.12mm/ turns, it is ensured that bits slag is smoothly discharged, and drilling rod 1 is avoided to block.
3, it positions, is marked in the centre bit point of power long axis stepped hole to be processed, it is ensured that the precision of bore position.
In the markers when heart site, it is ensured that the stepped hole of the vertical processing dynamics long axis of drill bit guarantees that bits slag is smoothly discharged and reduces power
The Wall-Thickness Difference of long axis.
4, major diameter drill bit 3 is connect by processing step hole with drilling rod 1, the absolute length of switchable drill bit depth drill processing macropore
Spending is 430mm, the process and assemble hole 23 in the drill bit assembly side of drilling rod 1, and major diameter drill bit 3 is threadedly coupled with pilot hole 23, is adjusted
Suitable revolving speed, the macropore in processing step hole, when major diameter 3 contact material of drill bit, first slowly feed, after piercing 1~2mm,
It is fed in normal speed, is worked into macropore designated length, exits major diameter drill bit 3；
Major diameter drill bit 3 is disassembled from drilling rod 1；
Small-diameter drill 4 is connect with guiding bar 22, guiding bar 22 is made of high-temperature alloy steel, length 350mm, radial
Having a size of 18mm, wall thickness 2.8mm, the first guide hole 221 of guiding bar 22 is processed.By the of Small-diameter drill 4 and adapting rod 21
One free end is threadedly coupled, and processes the second guide hole 211 of adapting rod 21, by the first guide hole 221 and the second of adapting rod 21
Free end is threadedly coupled, and processes the female part 212 of adapting rod 21, limited block is added to female part 212, length needed for adjusting；
Small-diameter drill 4 is linked into an integrated entity with guiding piece by adapting rod 21, then is threadedly coupled with pilot hole 23, it is switchable
The absolute growth of drill bit depth drill machining small is 500mm, the aperture in processing step hole, when 4 contact material of Small-diameter drill,
First slowly feed after piercing 1~2mm, is fed in normal speed, is worked into aperture designated length, exits Small-diameter drill 4, complete
Step hole machined.
5, drilling terminates, and stops operating, the bits slag on drill bit is understood.
Above-mentioned switchable drill bit depth drill process time is short, high in machining efficiency, and the surface roughness for processing hole is 3.1, adds
The straightness in work hole is 0.07mm.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of depth drill of switchable drill bit is greater than 15 for draw ratio and wall thickness is less than the deep hole machining with the level of 5mm,
Including drilling rod (1), which is characterized in that
The drill bit assembly side of drilling rod (1) is equipped with for guiding drill bit edge to be fitted axially on drilling rod (1) and adapting to different radial directions
The exchanging structure (2) of the switching assembly of the drill bit of size,
Drill bit is assemblied on drilling rod (1) and is rotated coaxially with drilling rod (1) by exchanging structure (2).
2. switchable drill bit depth drill according to claim 1, which is characterized in that
Exchanging structure (2) include for along axial assembly Small-diameter drill (4) adapting rod (21), for assembling adapting rod along axial
(21) and in deep hole it carries out in axially directed guiding bar (22) and drill bit assembly side in drilling rod (1) for along axial direction
The pilot hole (23) of major diameter drill bit (3) or guiding bar (22) is assembled in grafting.
3. switchable drill bit depth drill according to claim 2, which is characterized in that
Between the drill bit and the adapting rod (21), between the adapting rod (21) and the guiding bar (22), the guidance
Between bar (22) and the pilot hole (23), between the drill bit and the pilot hole (23) at least one at using bolt,
The connection of at least one of slot, grafting block or voussoir connection type；Or
Between the drill bit and the adapting rod (21), between the adapting rod (21) and the guiding bar (22), the guidance
Between bar (22) and the pilot hole (23), between the drill bit and the pilot hole (23) at least one at connect using multiple spot
At least one of touching transmission, line Contact Transmission or face contact transmission；Or
Between the drill bit and the adapting rod (21), between the adapting rod (21) and the guiding bar (22), the guidance
Between bar (22) and the pilot hole (23), between the drill bit and the pilot hole (23) at least one at using screw thread and
Locating part connection, screw thread ridge orientation is consistent with transmission direction, to guarantee the drill bit and the drilling rod (1) coaxial transmission and prevent
Only the adapting rod (21) and the guiding bar (22) fall off.
4. switchable drill bit depth drill according to claim 2, which is characterized in that
The adapting rod (21) uses high strength steel or high-temperature alloy steel；
Adapting rod (21) length is 200mm~400mm；
The adapting rod (21) is suitable for processing step blind hole of the draw ratio less than 25.
5. switchable drill bit depth drill according to claim 2, which is characterized in that
At least one of the cross section of the drilling rod (1), the cross section of the drill bit or cross section of the adapting rod (21)
Using eccentric arc shape；
Drilling rod (1) end is equipped with for reducing the shock-absorbing sleeve for generating vibration in the drill bit process；
Adapting rod (21) outside wall surface and/or inner wall are equipped with axial along adapting rod (21) and/or circumferentially lay and be used for
Reinforce the reinforcement convex ribs of adapting rod (21) intensity.
6. a kind of processing method of switchable drill bit depth drill, which comprises the following steps:
Major diameter drill bit (3) is connect with drilling rod (1), it is described in the drill bit assembly side of the drilling rod (1) process and assemble hole (23)
Major diameter drill bit (3) is fixedly connected with the pilot hole (23)；
Macropore in processing step hole is worked into macropore designated length, exits the major diameter drill bit (3)；
The major diameter drill bit (3) is disassembled from the drilling rod (1)；
Small-diameter drill (4) is connect with guiding bar (22), processes the first guide hole (221) of the guiding bar (22)；It will be described
Small-diameter drill (4) is connect with the first free end of adapting rod (21), processes the second guide hole (211) of the adapting rod (21),
First guide hole (221) is connect with the second free end of the adapting rod (21), processes holding for the adapting rod (21)
Interpolating unit (212)；
The Small-diameter drill (4) is linked into an integrated entity with guiding piece by adapting rod (21), then is fixedly connected with pilot hole (23),
Aperture in processing step hole is worked into aperture designated length, exits the Small-diameter drill (4), completes step hole machined.
7. the processing method of switchable drill bit depth drill according to claim 6, which is characterized in that
The absolute depth of aperture in the switchable drill bit depth drill processing step hole is 400mm~600mm；
The absolute depth of macropore in the switchable drill bit depth drill processing step hole is 300mm~500mm.
8. the processing method of switchable drill bit depth drill according to claim 6, which is characterized in that
The radial dimension of the adapting rod (21) is 5mm~20mm, and the wall thickness of the adapting rod (21) is 2mm~3mm；
The radial dimension of the major diameter drill bit (3) is 20mm~50mm；
The radial dimension of the Small-diameter drill (4) is 5mm~20mm.
9. the processing method of switchable drill bit depth drill according to claim 6, which is characterized in that
The surface roughness in the switchable drill bit depth drill processing hole is less than 3.2；
The straightness in the switchable drill bit depth drill processing hole is less than 0.08mm.
10. a kind of application of switchable drill bit depth drill described in any one of claim 1 to 5 in aerospace manufacture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810923678.5A CN108994351B (en) | 2018-08-14 | 2018-08-14 | Rotary joint drill bit deep hole drill, machining method and application |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810923678.5A CN108994351B (en) | 2018-08-14 | 2018-08-14 | Rotary joint drill bit deep hole drill, machining method and application |
Publications (2)
| Publication Number | Publication Date |
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| CN108994351A true CN108994351A (en) | 2018-12-14 |
| CN108994351B CN108994351B (en) | 2020-05-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810923678.5A Active CN108994351B (en) | 2018-08-14 | 2018-08-14 | Rotary joint drill bit deep hole drill, machining method and application |
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| Country | Link |
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| CN (1) | CN108994351B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110159201A (en) * | 2019-07-04 | 2019-08-23 | 交通运输部天津水运工程科学研究所 | A kind of drilling tool suitable for soft soil foundation Man-Hole digging |
| CN111168324A (en) * | 2020-03-16 | 2020-05-19 | 沈阳飞机工业（集团）有限公司 | Drilling method for AF1410 steel part after quenching |
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| CN2638891Y (en) * | 2003-08-25 | 2004-09-08 | 张万里 | Multi-joint expansion drill |
| US20070264094A1 (en) * | 2006-05-09 | 2007-11-15 | Seeley Scott C | Unibit with replacement blade |
| CN103619515A (en) * | 2011-04-21 | 2014-03-05 | 依诺维克私人有限公司 | Chuck tool and bits arrangement |
| US20160059322A1 (en) * | 2014-08-29 | 2016-03-03 | Seth Breslaw | Second stage drill bit |
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| CN2393674Y (en) * | 1999-09-24 | 2000-08-30 | 罗礼红 | Structure of stabilizing and replacing multi-axial drill bits |
| CN2638891Y (en) * | 2003-08-25 | 2004-09-08 | 张万里 | Multi-joint expansion drill |
| US20070264094A1 (en) * | 2006-05-09 | 2007-11-15 | Seeley Scott C | Unibit with replacement blade |
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| US20160059322A1 (en) * | 2014-08-29 | 2016-03-03 | Seth Breslaw | Second stage drill bit |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110159201A (en) * | 2019-07-04 | 2019-08-23 | 交通运输部天津水运工程科学研究所 | A kind of drilling tool suitable for soft soil foundation Man-Hole digging |
| CN110159201B (en) * | 2019-07-04 | 2024-02-27 | 交通运输部天津水运工程科学研究所 | Drilling tool suitable for manual hole guiding of soft soil foundation |
| CN111168324A (en) * | 2020-03-16 | 2020-05-19 | 沈阳飞机工业（集团）有限公司 | Drilling method for AF1410 steel part after quenching |
| CN111168324B (en) * | 2020-03-16 | 2021-07-09 | 沈阳飞机工业（集团）有限公司 | Drilling method for AF1410 steel part after quenching |
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| Publication number | Publication date |
|---|---|
| CN108994351B (en) | 2020-05-15 |
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