A kind of inner chamber depths inclined hole processing error protection method and device
The invention belongs to field of machining and machinebuilding technology, particularly a kind of inner cavity of component depths inclined hole feed fault and the neighbour that damages
Connect the error protection method and device of hole wall.
Certain type aero-engine pressurized strut cylinder part as depicted in figs. 1 and 2.There are one and master in the right-hand member inner chamber depths of part
The aperture of axis of rotation oblique, small pitch right side is deeper, is joint in the middle part of small end, and joint axis is vertical with main rovolving shaft line to be handed over
Fork, simultaneously with aperture axis square crossing.The processing technique of aperture is：Right-hand member lumen orifice is felt relieved, and right side supports, in a joint
Hole is surely angular, holds out against inner chamber macropore bottom surface, as shown in Figure 3 and Figure 4.
Because processed aperture is inclined hole, the easy deflection in hole, for preventing star drill partially, configuration special fixture simultaneously adopts drill bushing
Improve guiding；Again because aperture is located at inner chamber depths, bore entrance end spaces is positioned heart axle, drill bushing occupies, and the port of export is located at and connects
Head inner chamber depths, in processing, part is placed on Drilling machines bench, highly concordant with operator's trunk, wherein one end coupler bore quilt
Angular alignment pin insertion, joint inner chamber is light tight, and operator is difficult to visually to observe aperture and whether drills through, even if right in the course of processing
The axial direction of drill bit carries out spacing, if stopping means are unreliable or drill bit clamping is tight, aperture will be led to not drill through, or drill bit mistake
Feeding, causes drill bit to damage joint inner chamber hole wall.
Processed hole is Small Inclined Holes, and drill bit is acted on by asymmetric radial force, and drill bit is larger with drill bushing radial pressure, bores
Head is also big with the frictional force of drill bushing, and because aperture is intersected with joint lumen orifice, drills through rear left lower position, drill bit and joint inner chamber
Hole first contacts and contact surface is little, the power of generation less so that operator cannot perceive, the joint inner chamber hole wall thus drill bit is damaged,
Continue feeding, depth of damaging and area increase, and lead to part rejection.
Content of the invention
The technical problem to be solved in the present invention is：A kind of inner chamber depths inclined hole processing error protection method and device is provided, prevents
Only during the processing of inner chamber depths inclined hole, drill bit feeding is out of control and abutting joint inner chamber hole wall of damaging.
Technical scheme is as follows：
A kind of inner chamber depths inclined hole processing error protection method, before drill bit processing inclined, along lumen orifice in joint lumen orifice
Length direction places an auxiliary member being close to internal chamber wall, and one end of auxiliary member exposes to lumen orifice, and the other end exceedes inclined hole and is located
Position, the external diameter of auxiliary member is less than lumen orifice internal diameter.The action principle of auxiliary member be using during drill bit drilling along drill bit itself
Axis direction feeds, and contacts with auxiliary member during feeding, and triggering auxiliary member produces rotation (because the external diameter of auxiliary member is less than interior
Lumen pore diameter, auxiliary member is adherent simultaneously, and the feeding of drill bit can produce rotation to one tangential force with regard to attaching fulcrum of auxiliary member
Moment), then the exposed junction of auxiliary member follows rotation, by hand-held exposed junction, operator sense that drill bit drills through inclined hole,
A kind of auxiliary member processing error protection method for inner chamber depths inclined hole, described auxiliary member is a ring pipe, circle
Respectively there is 1/2 face of cylinder breach at pipe two ends.
Auxiliary member described further is rectilinear tubes.
Further, one end that described rectilinear tubes auxiliary member exposes to lumen orifice is tied with spacing adhesive tape, and spacing adhesive tape is entangled in auxiliary
The outer wall of assistant piece, is used for preventing auxiliary member from slipping in inner chamber, simultaneously works as a spacing work in opposing tabs lumen orifice end
Alternatively, one end that described rectilinear tubes auxiliary member exposes to lumen orifice is convexly curved shape, bending
Position-limiting action had both been played in one end, facilitates operator hand-held again and perception rotates.
In conjunction with the structure of above-mentioned error protection method and auxiliary member, the complete scheme of the present invention is as follows：
(1) manufacture and design auxiliary sleeve pipe：Auxiliary sleeve pipe is managed for ring section, and the outside diameter of auxiliary sleeve pipe is φ d, its length
Spend for length L；The endoporus of joint is Φ D2, and its length is that L3, φ d and Φ D2 coordinate, fit clearance 0.15mm ± 0.1mm, L=
L3+ (10mm～15mm)；The circumference of two ends 1/2 face of cylinder breach of auxiliary sleeve pipe is consistent；In the auxiliary reasonable position of sleeve pipe exposed junction
Put and twine spacing adhesive tape it is ensured that subsidiary conduit comes in and goes out during joint inner chamber, it is oblique that the position of 1/2 face of cylinder breach exceedes processed inner chamber
(2) part is installed：Part is fixed in fixture.
(3) insertion auxiliary sleeve pipe：Auxiliary sleeve pipe is inserted in the inner chamber of joint, spacing adhesive tape is pasted with cylinder joint end face
Close, visually the plane of the exposed junction semicircle of auxiliary sleeve pipe is horizontal.
(4) hole：Help the part being installed in fixture and inserting auxiliary sleeve pipe on the other hand, implement boring, after hole drill leads to,
The cutting tip of drill bit and auxiliary casing-contact, under drill bit effect, auxiliary sleeve pipe produces power and moment, and power and moment are transferred to
The exposed junction of auxiliary sleeve pipe, operator perceives by limbs, terminates drill bit feeding, completes inclined hole and processes it is ensured that joint lumen orifice
Wall is not bruised.
The present invention arranges auxiliary sleeve pipe (auxiliary member) between inclined hole exit and joint lumen orifice, after during drilling, drill bit drills through
First contact with auxiliary sleeve pipe (auxiliary member), generation power and moment, and be transferred to operator on hand, effectively prevent drill bit and damage and connect
Head inner chamber hole wall.
The progressive effect body acupuncture of the present invention proposes a kind of error protection technology to the processing of inner chamber depths inclined hole, by being added
Setting auxiliary sleeve pipe between work hole and joint lumen orifice, prevents inner chamber depths inclined hole from processing joint inner chamber of damaging further, realizes anti-
Mistake, easy to operate.
Fig. 1 is pressurized strut cylinder schematic diagram；
Fig. 2 is A1-A1 schematic cross-section in Fig. 1；
Fig. 3 is pressurized strut cylinder lumen depths inclined hole manufacturing procedure sketch；
Fig. 4 is A2-A2 schematic cross-section in Fig. 3；
Fig. 5 is auxiliary sleeve structure schematic diagram；
Fig. 6 and Fig. 7 is using auxiliary sleeve pipe processing inner chamber depths inclined hole schematic diagram；
Fig. 8 is the auxiliaring piece structure schematic diagram that one end is convexly curved.
In figure, 1 is auxiliary sleeve pipe, and 2 is drill bit, and 3 is pressurized strut cylinder, 4 spacing adhesive tapes；φ d is the cylindrical of auxiliary sleeve pipe 1
Diameter, 11 and 12 is the semicircle at auxiliary sleeve pipe 1 two ends respectively, and L is the length of auxiliary sleeve pipe 1, and L1 is auxiliary sleeve pipe 1 two ends semicircle
Length；31 is the inclined hole of pressurized strut cylinder right-hand member inner chamber depths, the diameter of Φ D inclined hole 31, and 32 is that pressurized strut cylinder 3 inner chamber is fixed
Position hole, Φ D1 is the diameter of inner chamber location hole 32, and 33 is the positioning support end face of pressurized strut cylinder 3, and 34 is pressurized strut cylinder 3
Joint lumen orifice, Φ D2 is the diameter of joint lumen orifice 34, and α is the angle of inclined hole 31 and axle axis of rotation, and L2 is joint inner chamber
The length in hole 34,21 is the cutting tip of drill bit 2.
Refer to the attached drawing 1～4, inclined hole as described in background technology for the processing, damage pressurized strut cylinder for preventing drill bit 2
3 joint lumen orifice 34, present invention employs following technical schemes：
Shown in Fig. 1,2,3,4,6, it is certain type aero-engine pressurized strut cylinder 3 part, right-hand member endoporus Φ D1 diameter is equal to
Φ 32mm, there is inclined hole its inner chamber depths, and inclined hole Φ D diameter is equal to Φ 4mm, and inclined hole is 52 ° with main rovolving shaft line bevel angle α, inclined hole
It is 26.5mm away from right side distance, the two nipple orifice square crossings in the right-hand member centre position of inclined hole and pressurized strut cylinder part, connect
Head length L3 is 35mm, and joint lumen orifice Φ D2 diameter is equal toJoint is symmetrical.
1st, manufacture and design auxiliary sleeve pipe 1：As shown in figure 5, auxiliary sleeve pipe 1 is managed for linear type ring section, auxiliary sleeve pipe 1
Outside diameter is φ d, and its length is length L；The endoporus of joint lumen orifice 34 is Φ D2, and its length is L3, and φ d and Φ D2 joins
Close, fit clearance 0.15mm ± 0.1mm, L=L3+ (10mm～15mm)=40mm；The two ends of auxiliary sleeve pipe 1 are semicircle 11 and 12
(corresponding 1/2 face of cylinder breach), semicircle 11 with 12 circumferential consistent, depth of parallelism 0.10mm of semi-circle plane, semicircle length is L1,
L1=4mm～6mm=5mm；Twine spacing adhesive tape 4 in subsidiary conduit exposed junction rational position it is ensured that subsidiary conduit comes in and goes out in joint
During lumen pore 34, the position of semicircle 11 exceedes processed inner chamber inclined hole.
2nd, part is installed：Part is fixed in fixture.
3rd, insertion auxiliary sleeve pipe 1：Auxiliary sleeve pipe 1 is inserted in the inner chamber of joint lumen orifice 34, spacing adhesive tape and cylinder connect
End surface is fitted, and visually the plane of the exposed junction semicircle 12 of auxiliary sleeve pipe 1 is horizontal.
4th, hole：Help the part being installed in fixture and inserting auxiliary sleeve pipe on the other hand, implement boring, after hole drill leads to,
The taking tangential sections 21 of drill bit 2 are contacted with auxiliary sleeve pipe 1, and under drill bit 2 effect, auxiliary sleeve pipe 1 produces power and moment, power and moment
It is transferred to assist the exposed junction of sleeve pipe 1, operator perceives by limbs, terminates drill bit feeding, complete inclined hole and process it is ensured that joint
Inner chamber hole wall is not bruised.
Alternatively, as shown in figure 8, for the auxiliary sleeve pipe 1 with arc-shaped bend for the one end.