CN206104625U - Device in straight flange hole is made to turning up on hollow closed part of complicated curved surface - Google Patents
Device in straight flange hole is made to turning up on hollow closed part of complicated curved surface Download PDFInfo
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- CN206104625U CN206104625U CN201621118288.3U CN201621118288U CN206104625U CN 206104625 U CN206104625 U CN 206104625U CN 201621118288 U CN201621118288 U CN 201621118288U CN 206104625 U CN206104625 U CN 206104625U
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- mandrel
- hole
- needle roller
- conical section
- needle
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Abstract
The utility model discloses a device in straight flange hole is made to turning up on hollow closed part of complicated curved surface belongs to the accurate forming technology field of board pipe part. The device includes needle bush, kingpin and dabber, the dabber carries out rotation and axial feed under the drive of lathe, the dabber rotation drives the needle bush and the kingpin uses the dabber to rotate as the center, and the kingpin carries out the rotation under the effect of dabber frictional force and component hole wall frictional force simultaneously, and needle bush, kingpin and dabber three mutually support and realize hole flanging on prefabricated swell of part. First prefabricated swell the on the part during hole flanging, then impress the hole flanging device gradually and will treat that processing material digs in the prefabricated hole hole, after sizing and school shape completion hole flanging technology. The utility model discloses the hole flanging device is simple, effectively reduces and make the technology degree of difficulty in straight flange hole to turning up on hollow closed part, and the frictional force effect between device and the part is less, and hole flanging size precision is higher, can effectively prevent hole flanging edge fracture.
Description
Technical field
This utility model is related to plate pipe part Precision Forming Technology field, and specially one kind is in complex-curved hollow closing
The device in turned-out straight flange hole processed on part.
Background technology
The tubulose of closing, tabular or other shapes hollow unit generally need to turn over straight flange processed when being connected with other parts
Hole, hole flanging generally include pilot hole, location hole, electrophoretic coating hole etc., part of this kind with straight flange hole extensively application and aviation,
The fields such as space flight, nuclear power and auto manufacturing, such as automobile accessory frame are on typical hollow parts and turn over all kinds processed
Hole is connected with miscellaneous part, generally adopts inner high voltage process forming pipe fitting, and then the mode of hydro piercing shapes hole flanging, then for example
The mode that multiple outside straight flange hole flangings are processed on nuclear power industry application annular pipe fitting is subsequently welded with miscellaneous part, to pass
Leading liquid medium carries out energy exchange.
And traditional handicraft mainly has the direct punching of common drift, light-wall pipe without progressive hole flanging of mould etc..For the tubulose of closing
Or during other special-shaped hollow unit hole flangings, frequently with common hole-punching method by direct punching, Chinese patent application on the outside of pipe fitting
CN201510360700.6 discloses this kind of process forming method, but problem is that the forming technology can only realize inside hole flanging, and
The outside hole flanging of hollow closing part cannot be realized, and hollow closing part generally needs to carry out welding etc. even with outside miscellaneous part
Mode is connect, and outside hole flanging side wall is needed as connection medium；And complex-curved hole flanging, due to hole flanging basal plane band it is cambered
With certain turning, after the material passage of diverse location, dependent variable is different, and the direct hole flanging of instantaneous drift can cause hole flanging edge
Local Cracking, affects the rigidity and service life of product.
Chinese patent application CN201510167803.0 discloses a kind of employing without the progressive flange hole technology of mould, and the method is led to
The high speed spinning motion for crossing the less tool heads of diameter and the circumferential movement around hole flanging central shaft for matching, with local facet
The mode of product contact gradually shapes hole flanging, and the technology can shape the hole flanging of common process complex surface difficult to realize, but
Its forming efficiency is low, forming tool complicated movement, and higher to supplemental equipment requirement, in addition, local asymmetry single-contact shape
The problems such as state causes hole flanging area discontinuity, forming accuracy to be difficult to ensure that.
Additionally, in both the above process, the friction mode between hole-flanging device and part is sliding friction, friction
Power is larger, and friction condition is poor, easily causes hole flanging inwall and scratches and the problems such as poor dimensional precision.Larger frictional force meeting in addition
Along with corresponding frictional heat, the thermal accumlation can aggravate the oxidation of hole flanging side-wall material to a certain extent, reduce piece surface matter
The problems such as amount and hole wall decay resistance.
Utility model content
In order to solve prior art in flange hole technology, the deficiency for especially existing during hole flanging on hollow closing part it
Place, the purpose of this utility model be provide it is a kind of it is complex-curved it is hollow closing part on turned-out straight flange hole processed device and
Method, this utility model forming device is simple, production efficiency is high, forming quality is excellent, difficulty of processing is low.
For achieving the above object, the technical scheme adopted by this utility model is as follows：
A kind of device in the turned-out straight flange hole processed on complex-curved hollow closing part, the device are tied for mechanical combination
Structure, including needle bush, needle roller and mandrel；Wherein：The needle bush is set on the outside of the mandrel, is provided with the side wall of needle bush
The equally distributed die cavity of four circumferences, the needle roller is placed in the die cavity simultaneously to be carried out to the needle roller spacing；The mandrel and institute
The side surface for stating needle roller contacts；The mandrel carries out rotation and axial feed under the drive of lathe, and mandrel rotation drives rolling
Needle guard and needle roller are rotated centered on mandrel, while needle roller carries out rotation, needle roller with the effect of hole in piece part wall friction power in mandrel
Realize completing hole flanging in the prefabricated bulge of hollow closing part under the mating reaction of set, needle roller and mandrel three.
The needle roller is one of the forming structure, is made up of with the needle roller conical section on top the needle roller cylindrical section of bottom, needle roller
Cylindrical section is used to turn over rounding hole, and needle roller conical section is for correcting shape to hole flanging；During work, needle roller side surface and needle bush and core
Axle contact with each other finishing device rotary motion and axial feed.
The mandrel is made up of two different conical sections of cone angle, is mandrel conical section I and mandrel conical section II respectively,
Wherein：Mandrel conical section I for being engaged with needle roller conical section, matched somebody with somebody for being contacted with needle roller cylindrical section by mandrel conical section II
Close；The mandrel is engaged the constrained realized to needle roller with needle bush.
The bevel angle and part stress situation of the device conical section meets relational expression (1)：
σf=μ σN(0<μ<1)；
In relational expression (1)：σfFor the frictional force between device conical section and hole wall, σNFor pressure of the device conical section to hole wall
Stress, σsFor the yield stress of part material, θ is the bevel angle of the device conical section, and μ is to rub between device conical section and hole wall
Wipe coefficient；Described device conical section refers to II corresponding device part of mandrel conical section, and the bevel angle of described device conical section is
Cone angle (taper surface and axial angle) for mandrel conical section II.Hole flanging in the prefabricated bulge of part is defined by relational expression (1)
Stress suffered by axially is less than the yield stress of part material, outwards can be realized in the prefabricated bulge of part under this condition
Turn over straight flange hole processed, and not be collapsed hole side wall.
In the device, the middle and upper part of the mandrel is provided with cannelure, for storing lubricating oil, realizes effective profit of device
It is sliding.
The hole flanging is referred to, coordinated with the height of device
Fast spinning motion, device were progressively fed with the time, were gradually completing flange hole technology.Using said apparatus in complex-curved hollow closing
On part, the method in turned-out straight flange hole processed, specifically includes following steps：
(1) the prefabricated drum on hollow closing part shaping structure and being of the required size using modes such as hydroformings
Bag；
(2) mandrel conical section I and mandrel cone are calculated according to the sized data of the physical dimension and institute's hole flanging of prefabricated bulge
The bevel angle of shape section II, needle roller taper segment length, needle roller cylindrical section length parameter；
(3) will treat that hole flanging part is fixed on workbench, and make pre-drilled cavity center be directed at mandrel axis；
(4) mandrel of the device is rotated and is fed axially downwards, make needle roller cylindrical section and part location contacts to be processed,
Rounding hole is turned over gradually；
(5) continue to keep hole-flanging device axial feed (providing axial power to hole-flanging device), treat needle roller conical section with
After straight wall hole Jing digging completely attaches to, the 8～10s of rotary motion of holding meanss realizes further sizing and school shape；
(6) reversely lift hole-flanging device so as to progressively disengage part, complete flange hole technology process, take out processing part.
During above-mentioned hole flanging, motivation structure based on mandrel in the forming device, and needle roller is in moulding material and mandrel
Common pressure and frictional force effect issue be conigenous turn and around the revolution motion of mandrel, needle bush be needle roller revolution act on
It is lower to be promoted and mandrel friction speed rotation in the same direction.
The beneficial effects of the utility model are as follows：
1st, the contact condition between the hole-flanging device and part in this utility model is rolling friction, relative to traditional cunning
The dynamic friction way of contact, its Frotteurism have clear improvement, and are conducive to improving the forming quality and precision of hole flanging inner surface, adopt
The mode of four needle rollers and parts locally juxtaposition metamorphose, plastic force needed for can effectively reducing hole flanging process realize progressive molding
Effect, can improve deformed area stress, reduce acting on the extra temperature rise that part is all contacted and produced because of device.
2nd, this utility model device is radial symmetric structure, device and hole flanging symmetric contact, improves non-right in traditional handicraft
Claim the defect of contact, prevent the unstability of deformed area hole wall in deformation process, improve the circularity and dimensional accuracy in turned over rounding hole.
3rd, the simple structure of this utility model device, is made up of several simple shape parts, and device forms of motion is single, only
Rotary motion and axial feed around central shaft need to be provided, the manipulation request to corollary equipment is substantially reduced；Production efficiency is higher,
Rolling friction is realized between hole-flanging device and part, it is possible to achieve the rotary motion of fair speed, coordinates larger axial feed,
Can further improve production efficiency.
Description of the drawings
Fig. 1 is that this utility model apparatus structure in turned-out straight flange hole processed on complex-curved hollow closing part is illustrated
Figure；Wherein：(a) front view；(b) upward view；(c) axial sectional view, (d) two conical section front views of mandrel.
Fig. 2 is the overall schematic in this utility model device turned-out straight flange hole processed on curve hollow part.
Fig. 3 be on the closed complex-curved hollow unit with prefabricated bulge turned-out straight wall hole can realize it is shoulded
The condition and fundamental diagram of satisfaction.
Fig. 4 is the outside process chart of hole flanging in prefabricated bulge in embodiment 1；Wherein：A () is in hole-flanging device alignment
Mandrel position work step；B () feeds progressively hole flanging work step axially downwards for hole-flanging device；C () enters to hole flanging side wall for hole-flanging device
Row school shape work step；D () terminates hole-flanging device for shaping and reversely exits machined piece surface；In figure (a)-(d)：Left figure and right figure
For the profile of different visual angles.
In figure：1- hole-flanging devices；The prefabricated bulges of 2-；11- needle bushes；12- needle rollers；121- needle roller conical sections；122- needle rollers
Cylindrical section；13- mandrels；131- mandrels conical section I；132- mandrels conical section II；3- initial blanks；4- fixtures.
Specific embodiment
The present invention is elaborated below in conjunction with drawings and Examples.But the present invention is not limited to following being embodied as
Mode.
This utility model is the device in the turned-out straight flange hole processed on complex-curved hollow closing part, i.e. hole-flanging device 1,
Its structure is as shown in Figure 1.The hole-flanging device 1 includes needle bush 11, needle roller 12 and mandrel 13；Needle bush 11 is set in outside mandrel 13
Side, is provided with the equally distributed die cavity of four circumferences on the side wall of needle bush 11, place the needle roller 12 and to needle roller 12 in die cavity
It is spacing, it is ensured that in the course of work, needle roller can prevent needle roller circumferentially or axially appoint back and forth around the rotary shaft rotation of itself
Meaning play；The mandrel 13 is contacted with the side surface of the needle roller 12, and mandrel 13 carries out rotation and axle under the drive of lathe
To feeding, 13 rotation of mandrel drives needle bush 11 and needle roller 12 to rotate (revolution) centered on mandrel, while needle roller 12 is in mandrel
13 carry out rotation with the effect of hole in piece part wall friction power, realize under needle bush 11, the mating reaction of 13 three of needle roller 12 and mandrel
Hole flanging is completed in the prefabricated bulge 2 of part.
The needle roller is one of the forming structure, by 121 groups of the needle roller conical section on needle roller cylindrical section 122 and the top of bottom
It is used to turning over rounding hole into, needle roller cylindrical section 122, needle roller conical section 121 is for correcting shape to hole flanging；The mandrel is the device
The power resources of rotation, mandrel generation spinning motion under the rotarily driving of lathe；Mandrel is by two different tapers of cone angle
Duan Zucheng, is mandrel conical section I 131 and mandrel conical section II 132 respectively, mandrel conical section I 131 for needle roller conical section
121 are engaged, and mandrel conical section II 132 is for being engaged with needle roller cylindrical section 122；Mandrel is engaged realization with needle bush
Constrained to needle roller.The middle and upper part of the mandrel is provided with cannelure, for storing lubricating oil, realizes effective profit of device
It is sliding；Outside axial force increase during, needle bush moves further locking mandrel and needle roller upwards, it is possible to achieve mandrel with
Being fully contacted for needle roller, completes hole flanging shaping.
The bevel angle and part stress situation of the device conical section meets relational expression (1)：
σf=μ σN(0<μ<1)；
In relational expression (1)：σfFor the frictional force between device conical section and hole wall, σNFor pressure of the device conical section to hole wall
Stress, σsFor the yield stress of part material, θ is the bevel angle of the device conical section, and μ is to rub between device conical section and hole wall
Wipe coefficient；Described device conical section refers to II corresponding device part of mandrel conical section, and the bevel angle of described device conical section is
Cone angle (taper surface and axial angle) for mandrel conical section II.Described device can realize the outside hole flanging in prefabricated bulge,
Do not limited by closed hollow part inner space is narrow and small, forming effect is notable.Belong to continuous between the device and parts to be processed
Point contact (instantaneous local 4 points contact), coordinate with the high speed spinning motion of device, device was progressively fed with the time, completed to turn over
Hole progressive molding, is finally completed hole flanging.
Using the schematic diagram such as Fig. 2 in said apparatus turned-out straight flange hole processed on complex-curved hollow closing part, hole flanging
Process is as follows：
(1) structure and the prefabricated bulge being of the required size are shaped using modes such as hydroformings；
(2) mandrel conical section I and mandrel cone are calculated according to the sized data of the physical dimension and institute's hole flanging of prefabricated bulge
The bevel angle of shape section II, needle roller taper segment length, needle roller cylindrical section length parameter；
(3) will treat that hole flanging part is fixed on workbench, and make pre-drilled cavity center be directed at mandrel axis；
(4) mandrel of the device is rotated and is fed axially downwards, make needle roller cylindrical section and part location contacts to be processed,
Rounding hole is turned over gradually；
(5) continue to keep hole-flanging device axial feed (providing axial power to hole-flanging device), treat needle roller conical section with
After straight wall hole Jing digging completely attaches to, the 8～10s of rotary motion of holding meanss realizes further sizing and school shape；
(6) reversely lift hole-flanging device so as to progressively disengage part, complete flange hole technology process, take out processing part.
Embodiment 1：
Treat in the present embodiment that hole flanging workpiece is hollow closing part, and surface is space curved surface structure, specially annular
Closing pipe (Fig. 2).Before carrying out flange hole technology, under the cooperation of appropriate internal high pressure forming technique, to ring seal pipe
The hydraulic expanding-forming under mould constraint state, prefabricated hole flanging bulge are carried out, and keeps 1 axis of hole-flanging device and hole flanging axis weight
Close.In order to ensure normal outside hole flanging of the device to prefabricated bulge part, outside hole-flanging device work in the prefabricated bulges of such as Fig. 3
Shown in schematic diagram, described device need to meet relational expression σf=μ σN(0<μ<1)；Prevent
By the be collapsed failure of device axial direction, when only there are enough support force components along radial direction, prefabricated drum could be realized before digging in hole
Wrap outside hole flanging.Fig. 1 is the preferred two-dimensional structure schematic diagram of the present embodiment device, and the device is radial symmetric structure, can by Fig. 1
Know, 11 upper and lower ends of needle bush are ring seal structure, and middle part is provided with four uniform needle roller limiting holes, rolls four during use
Pin 12 loads the inside of needle bush 11 from core, constrains its radial displacement, needle roller limiting holes and needle roller 12 by needle roller limiting holes
Between be sliding friction, provide lubrication by lubricating oil；Core of the mandrel 13 through needle bush 11, limits in the taper of needle bush 11
The lower mandrel 13 of effect reaches axial limit position, and two conical sections and the outer surface of four needle rollers 12 of mandrel 13 are fully contacted,
Mandrel 13 and 11 top of needle bush are threadedly attached.It is if Fig. 4 is outwards hole flanging technological process in prefabricated bulge, first
First structure and the prefabricated bulge being of the required size are processed using modes such as hydroformings；Then the structure according to prefabricated bulge
The data such as size, the diameter of pre-drilled cavity, hole flanging height calculate the key parameter of device, mainly have the taper of mandrel conical section I
Angle, the bevel angle of mandrel conical section II, needle roller taper segment length and needle roller cylindrical section length parameter, from dimension size
Hole-flanging device；Initial blank 3 is fixed on the table using corresponding fixture 4, the equipment that adjusting clamping has hole-flanging device makes
Device axis is coincided with the axis of hole flanging pre-manufactured hole；Start the rotary motion needed for equipment offer device and axially downwardly enter
Give, after the top edge that device conical section (part residing for mandrel conical section II) outer surface contacts prefabricated bulge, suitably adjust axle
To feed speed, under the rotation and revolution mating reaction of needle roller 12, the bulge edge of prefabricated band opening radially extends,
Hole flanging is constantly carried out；When the Upper cylindrical section (part residing for mandrel conical section I) of hole-flanging device is contacted with bulge inwall, stop
Axial feed, keeps mandrel to rotate 8～10s, hole flanging inwall is corrected shape；School shape turns axial feed direction after terminating, make
Needle roller departs from the inwall for having turned over drilling, and the rotation and axially-movable of arresting stop are unclamped fixture and remove machined part.
Above-described embodiment technology design only to illustrate the invention and feature, its object is to allow person skilled in the art
Scholar will appreciate that present disclosure and implement according to this, can not be limited the scope of the invention with this.It is all according to the present invention
Equivalence changes or modification that spirit is made, should all be included within the scope of the present invention.
Claims (5)
1. a kind of in the complex-curved hollow device for closing turned-out straight flange hole processed on part, it is characterised in that：The device is machine
Tool combinative structure, including needle bush, needle roller and mandrel；Wherein：The needle bush is set on the outside of the mandrel, the side of needle bush
The equally distributed die cavity of four circumferences is provided with wall, the needle roller is placed in the die cavity simultaneously to be carried out to the needle roller spacing；It is described
Mandrel is contacted with the side surface of the needle roller；The mandrel carries out rotation and axial feed under the drive of lathe, and mandrel is certainly
Turn to drive needle bush and needle roller to rotate centered on mandrel, while effect of the needle roller in mandrel frictional force and hole in piece part wall friction power
Under carry out rotation, needle bush, needle roller and mandrel triple interaction realize turned-out in the prefabricated bulge of hollow closing part
Straight flange hole processed.
2. according to claim 1 in the complex-curved hollow device for closing turned-out straight flange hole processed on part, its feature
It is：The needle roller is one of the forming structure, is made up of with the needle roller conical section on top the needle roller cylindrical section of bottom, needle roller cylinder
, for turning over rounding hole, needle roller conical section is for correcting shape to hole flanging for section；During work, needle roller side surface and needle bush and mandrel phase
Rotary motion and the axial feed of finishing device are contacted mutually.
3. according to claim 2 in the complex-curved hollow device for closing turned-out straight flange hole processed on part, its feature
It is：The mandrel is made up of two different conical sections of cone angle, is mandrel conical section I and mandrel conical section II respectively, its
In：, for being engaged with needle roller conical section, mandrel conical section II is for being engaged with needle roller cylindrical section for mandrel conical section I；
The mandrel is engaged the constrained realized to needle roller with needle bush.
4. according to claim 3 in the complex-curved hollow device for closing turned-out straight flange hole processed on part, its feature
It is：The bevel angle and part stress situation of the device conical section meets relational expression (1)：
σf=μ σN(0<μ<1)；
In relational expression (1)：σfFor the frictional force between device conical section and hole wall, σNFor compressive stress of the device conical section to hole wall,
σsFor the yield stress of part material, θ is the bevel angle of the device conical section, and μ is friction system between device conical section and hole wall
Number；Described device conical section refers to II corresponding device part of mandrel conical section, and the bevel angle of described device conical section is core
The cone angle of axle conical section II.
5. according to claim 4 in the complex-curved hollow device for closing turned-out straight flange hole processed on part, its feature
It is：The middle and upper part of the mandrel is provided with cannelure, for storing lubricating oil, realizes the effectively lubricating of device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621118288.3U CN206104625U (en) | 2016-10-12 | 2016-10-12 | Device in straight flange hole is made to turning up on hollow closed part of complicated curved surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621118288.3U CN206104625U (en) | 2016-10-12 | 2016-10-12 | Device in straight flange hole is made to turning up on hollow closed part of complicated curved surface |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206104625U true CN206104625U (en) | 2017-04-19 |
Family
ID=58529357
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621118288.3U Withdrawn - After Issue CN206104625U (en) | 2016-10-12 | 2016-10-12 | Device in straight flange hole is made to turning up on hollow closed part of complicated curved surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206104625U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238539A (en) * | 2016-10-12 | 2016-12-21 | 中国科学院金属研究所 | A kind of device and method in turned-out straight flange hole processed on complex-curved hollow closing part |
-
2016
- 2016-10-12 CN CN201621118288.3U patent/CN206104625U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106238539A (en) * | 2016-10-12 | 2016-12-21 | 中国科学院金属研究所 | A kind of device and method in turned-out straight flange hole processed on complex-curved hollow closing part |
| CN106238539B (en) * | 2016-10-12 | 2019-01-04 | 中国科学院金属研究所 | The device and method in turned-out straight flange hole processed on complex-curved hollow closing part |
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| GR01 | Patent grant | ||
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| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170419 Effective date of abandoning: 20190104 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20170419 Effective date of abandoning: 20190104 |