CN105057418A - Forming fixture and method for manufacturing arc-shaped parts by bending high-temperature alloy thin-wall rectangular pipes - Google Patents
Forming fixture and method for manufacturing arc-shaped parts by bending high-temperature alloy thin-wall rectangular pipes Download PDFInfo
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- CN105057418A CN105057418A CN201510419854.8A CN201510419854A CN105057418A CN 105057418 A CN105057418 A CN 105057418A CN 201510419854 A CN201510419854 A CN 201510419854A CN 105057418 A CN105057418 A CN 105057418A
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Abstract
The invention provides a forming fixture and method for manufacturing arc-shaped parts by bending high-temperature alloy thin-wall rectangular pipes. The forming fixture comprises a rolling plate, a positioning ring, a stressing mechanism and a circumferential positioning and clamping mechanism. Manual bending of the rectangular thin-wall pipes is achieved through the rolling plate, the positioning ring and the stressing mechanism. The structure is simple, the fixture and the method are easy to realize, convenient to use and practical, operation is easy and convenient, safety and reliability are achieved, machining condition requirements are not high, and production cost is low. Meanwhile, after the rectangular thin-wall pipes are bent and formed, the bending radius is controlled within +/-1. Section deformation is controlled within 0.3. Pipe surfaces of bent parts are flat and smooth, wrinkles and creases are not generated, and the shape and the size of machined parts meet the requirements of a design drawing.
Description
[technical field]
The present invention relates to sheet-metal formed field, specifically provide shaping jig and the method for a kind of high temperature alloy bending thin-wall rectangular tube part in the arc-shaped.
[background technology]
Certain aero-engine thin-wall rectangular bent pipe parts material is high temperature alloy GH536, wall thickness is 0.6mm, the bending radius of part is R495.56, has the rectangular tube of 28.63 × 21.89mm to be bent into the circular arc part of radius R 495.56 by cross section specification, and its processability requires high.Aero-engine annual output quantity is little, and part mostly is single-piece production, considers and saves production cost, and this part adopts the method for manual bending to process.If adopt traditional brake forming processing method, because thin-wall rectangular tubular construction is special, shaping shape difficulty is large compared with round tube, and when rectangular tube bends, the material outside of shaping area more easily causes wall thickness reduction serious by tangential stress; Inside material causes seriously wrinkling by circumferential compressive force, and in BENDING PROCESS, rebound phenomenon is obvious, causes exterior cross-section to distort, and bending radius dimensional requirement is difficult to ensure.Therefore adopt traditional brake forming processing method to be difficult to realize.
[summary of the invention]
For solving the problem, the invention provides a kind of shaping jig that is easy to operate, high temperature alloy bending thin-wall rectangular tube part in the arc-shaped fast and accurately and method, there is not wrinkling, depression defect and dimensionally stable in the bent pipe parts outward appearance of processing.
For achieving the above object, technical scheme of the present invention is as follows:
The shaping jig of high temperature alloy bending thin-wall rectangular tube part in the arc-shaped, comprises rolling disk, locating ring, boosting mechanism and circumferential positioning and clamping mechanism; Described boosting mechanism comprises rolling wheel support, roller is arranged on rolling wheel support by pin, rolling wheel support to be fixed on rolling disk by back shaft and can to rotate around back shaft, locating ring is arranged on rolling disk coordinates with rolling disk and forms rectangular tube detent, the roller of boosting mechanism is in detent open side, make roller along rectangular tube cylindrical rolling force, rectangular tube be bent to locating ring inner circle locating surface by boosting mechanism, circumferential positioning and clamping mechanism is fixed on rolling disk for limiting the position of circumferencial direction when rectangular tube bends.
Further, described circumferential positioning and clamping mechanism comprises the support plate 9 be fixed on rolling disk, and be provided with the groove holding rectangular tube in support, slot opening side is provided with pressing plate by housing screw, compresses rectangular tube by pressing plate.
Further, described rolling wheel support is provided with handle.
Further, described locating ring and rolling disk adopt screw to be connected and fixed.
Further, the exradius of described locating ring is more smaller than finished product arc radius.
Further, described locating ring exradius about 80 ~ 120mm less of finished product circular arc.
Further, described rolling disk center hole is used for back shaft to be passed through, and back shaft and rolling disk center hole fit clearance are not more than 0.02mm.
The forming method of high temperature alloy bending thin-wall rectangular tube part in the arc-shaped, comprises the following steps:
(1) clean: rinse rectangular tube pipe surfaces externally and internally, check pipe surfaces externally and internally, tube chamber foreign;
(2) prepare: the housing screw unclamping circumferential positioning and clamping mechanism, and roller is moved to circumferential positioning and clamping mechanism side;
(3) clamping: be put in the groove under roller by rectangular tube blank, makes rectangular tube end face near circumferential positioning and clamping mechanism, and tightens housing screw;
(4) afterburning: to be exerted a force by handle and steadily twist boosting mechanism, rectangular tube is slowly flowed in rolling disk detent under pressure, and boosting mechanism continues to drive roller to rotate, make rectangular tube completely and rolling disk outer ring be adjacent to;
(5) complete: the housing screw unclamping circumferential positioning and clamping mechanism, take out finished parts.
Further, after step (1) has cleaned rectangular tube, in rectangular tube, fill full rosin; Block rosin is added in melting channel after fusing, fill with in the sub-rectangular tube of inlet pipe and ensure to fill up inner chamber; To carrying out of rectangular tube rosin operation after step (5) completes, after melting rosin, rectangular bend is cleaned up, carries out water blast, ensure that bend pipe surfaces externally and internally remains without rosin.
The present invention has following beneficial effect:
Bending thin-wall rectangular tube shaping jig of the present invention, by rolling disk, locating ring, boosting mechanism and circumferential positioning and clamping mechanism composition, by rolling disk, locating ring, boosting mechanism realizes the manual bending of rectangle thin wall pipe, structure is simple, is easy to realize, convenient and practical, easy and simple to handle, safe and reliable, processing conditions is less demanding, and production cost is low; After thin-wall rectangular brake forming can being reached simultaneously, bending radius controls in ± 1 scope, and section deformation controls in 0.3 scope, and the fractal tube-surface of bend is smooth, smooth, do not produce wrinkling, folding line phenomenon, the part shape processed and size all meet design drawing requirement.
This employing boosting mechanism exerts a force shaping method, and method is reliable, and part working (machining) efficiency is high, and the defects such as wrinkling, depression do not appear in the bent pipe parts outward appearance of processing, and dimensionally stable, on average every 3 minutes shaping one parts.Solve this type of aero-engine high temperature alloy bending thin-wall rectangular tube and become the unmanageable technical barrier of round shape part.Simultaneously also for similar aero-engine high temperature alloy bending thin-wall rectangular tube becomes the shaping manufacture of round shape part to provide valuable experience for reference, have broad application prospects and good promotional value.
[accompanying drawing explanation]
Fig. 1 shaping jig structural representation
Fig. 2 is that the B-B of Fig. 1 is to sectional view
Fig. 3 roller structure schematic diagram
Fig. 4 locating ring and rolling disk structural representation
Fig. 5 circumference positioning and clamping mechanism schematic diagram
Fig. 6 is bend pipe structure schematic diagram
Fig. 7 is that the A-A of Fig. 6 is to sectional view
In figure: rolling disk (1), locating ring (2), rolling wheel support (3), roller (4), pin (5), back shaft (6), circumferential positioning and clamping mechanism (7), handle (8), support plate (9), pressing plate (10), housing screw (11), rectangular tube (12).
[detailed description of the invention]
Below in conjunction with drawings and Examples, the present invention is further illustrated, but the present invention is not limited to following examples.
As depicted in figs. 1 and 2, the present invention is by research design of part feature, dimension precision requirement, formulate bending process scheme, by design specialized bending fixture, shaping jig mainly comprises roller 4, locating ring 2, circumferential positioning and clamping mechanism 7, rolling disk 1 and boosting mechanism.Rectangular bend blank coordinates the groove formed locate by rolling disk 1 in fixture with locating ring 2, the clearance control blank of dependence roller 4 and rolling disk 1 flows, guarantee blank when brake forming can not wrinkling with tear.Boosting mechanism is fixed on rolling disk 1 by back shaft 6, and guides the assembling of whole fixture upper and lower part.Locating ring 2 and rolling disk 1 adopt screw to be connected and fixed, and avoid blank to misplace in forming process.By the force to handle 8, roller 4 is fitted with rectangular tube 12 surface, rectangular tube 12 is fitted rolling disk 1 gradually.After brake forming completes, the housing screw 11 of circumferential positioning and clamping mechanism 7 is unclamped, take out part.
Described boosting mechanism achieves the steady precise forming of part.Wherein boosting mechanism is made up of handle 8, rolling wheel support 3, pin 5 and roller 4.
Described roller 4 effect is under the effect of boosting mechanism, exerts a force along rectangular tube 12 cylindrical, realize rectangular tube 12 when bending and locating ring 2 inner circle locating surface fit.Roller 4 structure as shown in Figure 3.
Described locating ring 2 effect is arc radius when ensureing that rectangular tube bends.Consider the rebound phenomenon in BENDING PROCESS, the exradius of locating ring 2 should be more smaller than the bending radius of rectangular tube.According to material behavior and processing experience, determine that locating ring 2 exradius is that tube bending radius reduces about 80 ~ 120mm.Locating ring 2 width is determined by the width of rectangular tube, adopts the matched in clearance being less than 0.10, with the deflection in effective control rectangle pipe cross section when bending during design.Locating ring 2 active section length should meet the requirement of round shape angle length dimension.Locating ring 2 and rolling disk 1 are as shown in Figure 4.
Described rolling disk 1 effect is that the side compressing blank prevents it wrinkling.Rolling disk 1 profile is circular, and center hole is used for back shaft 6 to be passed through, for fixed idler whell support 3 and rolling disk 1.Back shaft 6 and rolling disk 1 center hole ensure that fit clearance is not more than 0.02mm.Rolling disk 1 external diameter should meet the design drawing requirement of rectangular tube round shape part internal diameter, and active section length should meet the requirement of round shape angle length dimension.
Described circumferential positioning and clamping mechanism 7 effect is the position limiting circumferencial direction when rectangular tube bends, and is with dynamic pressure plate 10 to compress rectangular tube by housing screw 11, prevents rectangular tube from producing when bending mobile.Circumference positioning and clamping mechanism 7 as shown in Figure 5.
Part is as follows at the forming step of shaping jig:
(1) clean: rinse pipe surfaces externally and internally, check pipe surfaces externally and internally, tube chamber foreign.
(2) fill with rosin: the present invention adopts the method for filling rosin, strengthen intensity during bending thin-wall rectangular tube, the distortion in rectangular tube cross section during to reduce bending.Added by block rosin in melting channel, temperature is adjusted to rosin fusion temperature 120 DEG C ~ 150 DEG C.After rosin melts completely, rosin is continuously filled with into tube cavity.After rosin cooling, confirm in pipe, whether rosin fills up.
(3) prepare: shaping jig is placed on smooth vice bench, unclamps the housing screw 11 of circumferential positioning and clamping mechanism 7, and roller 4 is moved to circumferential positioning and clamping mechanism 7 side.
(4) clamping: be put in the groove under roller by rectangular tube blank, makes rectangular tube end face near circumferential positioning and clamping mechanism 7, and tightens housing screw 11.
(5) afterburning: both hands are held with a firm grip handle 8 circumferentially apply pulling force clockwise, steady twisting boosting mechanism, part blank slowly flows in rolling disk cavity under pressure, and boosting mechanism continues to drive roller to rotate, make part blank completely and rolling disk outer ring be adjacent to.
(6) complete: the housing screw 11 unclamping circumferential positioning and clamping mechanism 7, take out part, put into the brake forming that another rectangular tube blank can proceed next part.
(7) rosin is changed: to carrying out of rectangular tube rosin operation.
(8) water blast: rectangular bend cleaned up, carries out water blast, ensures that bend pipe surfaces externally and internally remains without rosin.
(9) check: check the bending radius of bend pipe, sectional dimension and presentation quality.
For certain engine duct part: blank rectangular tube material is high temperature alloy GH536, section A 1 × B1 is 28.63 × 21.89mm, and wall thickness is 0.6mm, and the bending radius of part is R495.56 ± 8.As shown in accompanying drawing 6 and Fig. 7.
Due to rectangular tube bend mainly through bending fixture realize, consider the rebound phenomenon in BENDING PROCESS, the exradius of locating ring 2 should be more smaller than the bending radius of rectangular tube.According to material behavior and processing experience, determine that fixture locating ring 2 exradius Ф D is 849-0.1.
Brake forming process is as follows:
(1) clean: rinse pipe surfaces externally and internally with 180# gasoline, and dry up with clean clean compressed air, check pipe surfaces externally and internally, tube chamber foreign.
(2) fill with rosin: the present invention adopts the method for filling rosin, strengthen intensity during bending thin-wall rectangular tube, the distortion in rectangular tube cross section during to reduce bending.Operating procedure is as follows:
A, in rosin groove, add enough block rosins.
B, energising, be adjusted to rosin fusion temperature 120 DEG C ~ 150 DEG C by the temperature of rosin groove.
C, after the rosin in groove melts completely, the rosin of fusing continuously to be filled with into tube cavity (fill with rosin before pipe other end asbestos cord block).
D, until rosin cooling after, observe confirm pipe in rosin whether fill up, need continue during as do not filled up add fusing rosin.
After e, rosin condensation, the pit of surperficial self-assembling formation is normal, is not more than 10mm allows after rosin solidifies from the distance of the mouth of pipe.
F, filled with rosin after, the rosin of outer tube surface is cleaned out.Rosin groove power supply disconnects.
(3) prepare: shaping jig is placed on smooth vice bench, unclamps the housing screw 11 of circumferential positioning and clamping mechanism 7, and roller is moved to circumferential positioning and clamping mechanism 7 side.
(4) clamping: be put in the groove under roller by rectangular tube blank, makes rectangular tube end face near circumferential positioning and clamping mechanism 7, and tightens housing screw 11.
(5) afterburning: both hands are held with a firm grip handle 8 circumferentially apply pulling force clockwise, steady twisting boosting mechanism, part blank slowly flows in rolling disk cavity under pressure, and boosting mechanism continues to drive roller to rotate, make part blank completely and rolling disk outer ring be adjacent to.
(6) complete: the housing screw unclamping circumferential positioning and clamping mechanism 7, take out part.
(7) rosin is changed: to carrying out of rectangular bend rosin operation.When changing rosin, pipe is placed in rosin stove, when putting pipe, tubular direction should be noted, premised on rosin can freely flow out under gravity.Rosin furnace temperature is adjusted to 120 DEG C ~ 150 DEG C, is incubated 2 ~ 4 hours.Close rosin stove power supply, confirm that temperature drops to the bend pipe of less than the 30 DEG C rear complete rosin of taking-upization.
(8) water blast: rectangular bend cleaned up, carries out water blast, ensures that bend pipe surfaces externally and internally remains without rosin.
(9) to check: bending radius is R495.56 ± 1, section deformation is not more than ± and 0.3, smooth in appearance, without wrinkling, folding line phenomenon.
Claims (9)
1. the shaping jig of high temperature alloy bending thin-wall rectangular tube part in the arc-shaped, is characterized in that: comprise rolling disk (1), locating ring (2), boosting mechanism and circumferential positioning and clamping mechanism (7), described boosting mechanism comprises rolling wheel support (3), roller (4) is arranged on rolling wheel support (3) by pin (5), rolling wheel support (3) is fixed on rolling disk (1) by back shaft (6), and can rotate around back shaft (6), locating ring (2) is arranged on and rolling disk (1) upper cooperation with rolling disk (1) forms rectangular tube (12) detent, the roller (4) of boosting mechanism is in detent open side, roller (4) is made along rectangular tube cylindrical rolling force, rectangular tube to be bent to locating ring inner circle locating surface by boosting mechanism, circumference positioning and clamping mechanism (7) is fixed on rolling disk (1) for limiting the position of circumferencial direction when rectangular tube bends.
2. the shaping jig of high temperature alloy bending thin-wall rectangular tube according to claim 1 part in the arc-shaped, it is characterized in that: described circumferential positioning and clamping mechanism comprises the support plate 9 (9) be fixed on rolling disk (1), the groove holding rectangular tube is provided with in support (9), slot opening side is provided with pressing plate (10) by housing screw (11), compresses rectangular tube by pressing plate (10).
3. the shaping jig of high temperature alloy bending thin-wall rectangular tube according to claim 1 part in the arc-shaped, is characterized in that: described rolling wheel support (3) is provided with handle (8).
4. the shaping jig of high temperature alloy bending thin-wall rectangular tube according to claim 1 part in the arc-shaped, is characterized in that: described locating ring (2) and rolling disk (1) adopt screw to be connected and fixed.
5. the shaping jig of high temperature alloy bending thin-wall rectangular tube according to claim 1 part in the arc-shaped, is characterized in that: the exradius of described locating ring (2) is more smaller than finished product arc radius.
6. the shaping jig of high temperature alloy bending thin-wall rectangular tube according to claim 1 part in the arc-shaped, is characterized in that: described locating ring (2) exradius about 80 ~ 120mm less of finished product circular arc.
7. the shaping jig of high temperature alloy bending thin-wall rectangular tube according to claim 1 part in the arc-shaped, it is characterized in that: described rolling disk (1) center hole is used for back shaft to be passed through, and back shaft and rolling disk center hole fit clearance are not more than 0.02mm.
8. carry out the forming method of high temperature alloy bending thin-wall rectangular tube part in the arc-shaped based on claim 1-7 shaping jig, it is characterized in that comprising the following steps:
(1) clean: rinse rectangular tube pipe surfaces externally and internally, check pipe surfaces externally and internally, tube chamber foreign;
(2) prepare: the housing screw (11) unclamping circumferential positioning and clamping mechanism (7), and roller (4) is moved to circumferential positioning and clamping mechanism side;
(3) clamping: be put in the groove under roller by rectangular tube (12) blank, makes rectangular tube end face near circumferential positioning and clamping mechanism, and tightens housing screw (11);
(4) afterburning: steadily to twist boosting mechanism by handle (8) force, rectangular tube (12) is made slowly to flow in rolling disk (1) detent under pressure, boosting mechanism continues to drive roller (4) to rotate, make rectangular tube (12) completely and rolling disk (1) outer ring be adjacent to;
(5) complete: the housing screw (11) unclamping circumferential positioning and clamping mechanism, take out finished parts.
9. forming method according to claim 8, is characterized in that: after step (1) has cleaned rectangular tube, fills full rosin in rectangular tube; Block rosin is added in melting channel after fusing, fill with in the sub-rectangular tube of inlet pipe and ensure to fill up inner chamber;
To carrying out of rectangular tube rosin operation after step (5) completes, after melting rosin, rectangular bend is cleaned up, carries out water blast, ensure that bend pipe surfaces externally and internally remains without rosin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510419854.8A CN105057418A (en) | 2015-07-16 | 2015-07-16 | Forming fixture and method for manufacturing arc-shaped parts by bending high-temperature alloy thin-wall rectangular pipes |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510419854.8A CN105057418A (en) | 2015-07-16 | 2015-07-16 | Forming fixture and method for manufacturing arc-shaped parts by bending high-temperature alloy thin-wall rectangular pipes |
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| CN105057418A true CN105057418A (en) | 2015-11-18 |
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| CN201510419854.8A Pending CN105057418A (en) | 2015-07-16 | 2015-07-16 | Forming fixture and method for manufacturing arc-shaped parts by bending high-temperature alloy thin-wall rectangular pipes |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106002103A (en) * | 2016-06-22 | 2016-10-12 | 湖北三江航天江北机械工程有限公司 | Forming method for iron-based high-temperature alloy distributing ring |
| CN108642258A (en) * | 2018-05-17 | 2018-10-12 | 苏州罗克莱堆焊科技有限公司 | A kind of bimetal metallurgy composite-curve heat treatment process |
-
2015
- 2015-07-16 CN CN201510419854.8A patent/CN105057418A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106002103A (en) * | 2016-06-22 | 2016-10-12 | 湖北三江航天江北机械工程有限公司 | Forming method for iron-based high-temperature alloy distributing ring |
| CN108642258A (en) * | 2018-05-17 | 2018-10-12 | 苏州罗克莱堆焊科技有限公司 | A kind of bimetal metallurgy composite-curve heat treatment process |
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Application publication date: 20151118 |
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