CN214211846U - Titanium alloy hollow blade variable cross-section high-temperature torsion preforming device - Google Patents
Titanium alloy hollow blade variable cross-section high-temperature torsion preforming device Download PDFInfo
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- CN214211846U CN214211846U CN202022468838.7U CN202022468838U CN214211846U CN 214211846 U CN214211846 U CN 214211846U CN 202022468838 U CN202022468838 U CN 202022468838U CN 214211846 U CN214211846 U CN 214211846U
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- 229910001069 Ti alloy Inorganic materials 0.000 title claims abstract description 14
- 238000010438 heat treatment Methods 0.000 claims abstract description 53
- 238000001816 cooling Methods 0.000 claims abstract description 49
- 238000003856 thermoforming Methods 0.000 claims abstract description 43
- 239000000919 ceramic Substances 0.000 claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000009413 insulation Methods 0.000 claims description 51
- 239000000498 cooling water Substances 0.000 claims description 5
- 238000005485 electric heating Methods 0.000 claims description 5
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 24
- 238000013461 design Methods 0.000 description 9
- 238000005452 bending Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
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- 238000012546 transfer Methods 0.000 description 1
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Abstract
The utility model discloses a hollow blade variable cross-section high temperature of titanium alloy twists reverse preforming device, include: a thermoforming machine tool, a tenon clamping fixture, a twisting fixture and a deformation limiting mould; the upper and lower working platforms of the thermoforming machine tool are respectively composed of a heating layer, a heat-resistant ceramic layer and a water cooling layer, a tenon clamping fixture is used for clamping a tenon of a blade blank and fixed in the thermoforming machine tool, and a twisting fixture is used for clamping a blade body of the blade; the rotating shaft of the twisting clamp is parallel to the table surfaces of the upper working platform and the lower working platform of the thermoforming machine tool; the deformation limiting die is installed on a deformation limiting die fixing plate, and the deformation limiting die fixing plate is connected with the lower lifting platform through a lower ejector rod. The utility model is suitable for a different torsion angle and overall dimension's blade high temperature twists reverse the taking shape, can ensure to twist reverse the accurate assembly of back blade in follow-up finishing forming die.
Description
Technical Field
The utility model belongs to the technical field of the accurate plasticity of blade takes shape, specifically indicate a hollow blade variable cross section high temperature of titanium alloy twists reverse preforming device.
Background
The high-performance aircraft engine is an important basis for the development of the modern aviation industry, the wide-chord hollow fan blade can effectively improve the performance of the aircraft engine, high thrust-weight ratio, high thrust and low oil consumption aviation are realized, and the precision forming technology of the wide-chord hollow fan blade is one of the key technologies in the field of the manufacturing of the modern aircraft engine. Because the wide-chord hollow fan blade of the aeroengine has a complex space curved surface shape and a hollow structure inside, the forming is difficult, and the precise manufacturing can not be realized by adopting mechanical processing and additive manufacturing methods. The method combines mechanical processing, adopts a diffusion connection-high temperature torsion-high temperature stamping-high temperature ballooning plastic forming process route, and can effectively and accurately form the hollow blade with a complex structure. Because the hollow blade often has great torsion angle, hollow blade blank can not directly assemble and carry out stamping forming in high temperature stamping die. The transition-shaped blade blank with a certain torsion angle can be obtained through a high-temperature torsion process, so that the blade can be installed in a die for subsequent stamping. In the high-temperature twisting process, the deformation of materials at other parts of the blade except for the twisting clamping part is not limited by a mold, so that the phenomena of over-deformation and insufficient local deformation are easy to occur. The excessive deformation can cause the interference of the local part of the twisted blade and a high-temperature stamping die, so that the blade cannot be accurately positioned in the die, and the local transitional thinning and insufficient material can be caused on the other hand, and finally the part is scrapped. In order to realize the torsional preforming of the hollow blade, special high-temperature torsion equipment needs to be designed and manufactured, and relevant process parameters such as a torsion center, an angle, speed, temperature and the like need to be accurately controlled and optimized. At present, the high-temperature torsion forming method and equipment for the hollow fan blade of the aero-engine with a complex shape mainly adopt the following forms:
(1) and clamping the blade tenon, and pushing the blade into a hole-opening die cavity with a torsional profile die to perform bending forming. The invention has the patent application number of CN201310508213.0, and the name is "hollow blade push-bending forming process", and proposes a high-temperature push-bending forming process and a push-bending forming die, wherein the blade is pushed into a die cavity by clamping a blade tenon to be forced to bend and be twisted and deformed, however, the part of the blade which does not enter the die during the process is not controlled to deform, the resistance borne by the blade in the process of forward push-bending is large, and the blade is easy to be compressed and unstable to cause that the blade cannot be formed.
(2) The tenon end and the tip end of the blade are clamped through the clamp, the tenon end is fixed, and the tip end of the blade rotates to drive the blade body to deform so as to realize torsion. The invention has the Chinese patent application number of CN201510600373.7 and is named as a blade torsion test device, and discloses a method for clamping two ends of a blade, which can realize the accurate small-angle torsion of the blade at high temperature, is suitable for the performance torsion test of the blade in a laboratory and cannot be applied to the torsion forming production application of a large-torsion-angle hollow blade. The Chinese invention patent application number is CN201410809328.8, and is named as a twisting furnace for blade forming, and the method for clamping two ends is disclosed to be capable of twisting the blade in a vacuum furnace at a large angle and high temperature. The accurate high-temperature torsion forming of the clamping position of the blade can be realized through the clamping mode at the two ends, but the middle part of the blade is not limited by the deformation of a clamp in the torsion process, so that the local deformation is insufficient and the over-deformation is easily caused under the driving of the deformation at the two ends, and the twisted blade cannot be accurately positioned in a high-temperature stamping forming die, and the over-deformation can cause the insufficient local material and cannot be formed.
(3) Based on a discretization forming method, a plurality of sets of fixtures are adopted to respectively carry out torsion forming on a plurality of sections or a plurality of dot matrix areas of the blade. The Chinese patent application No. CN201510122613.7 entitled "hollow blade multi-section synchronous torsion forming method" discloses that the torsion deformation of different sections of a blade can be accurately controlled in a plurality of sections through a push rod type torsion device. The Chinese invention patent application number is CN201710895074.X, and the name is 'a hollow blade multi-point synchronous hot twisting forming device and a forming method', which discloses that a blade twisting area is dispersed into a lattice space, and the simultaneous twisting of multiple areas of the blade can be realized through a lattice type punch device. However, in the multi-section or multi-point forming method, a plurality of driving devices need to be controlled to work cooperatively, each twisting device designs a loading process according to the deformation condition of each corresponding region, the coordinated deformation of adjacent regions is not considered, and each twisting device is easy to interfere with each other in the twisting process to cause local deformation defects, so that the blade cannot be formed finally.
Disclosure of Invention
In view of the above-mentioned prior art, an object of the present invention is to provide a titanium alloy hollow blade variable cross-section high-temperature torsion preforming device to solve the problem of deformation defects such as excessive torsion deformation caused by the hollow blade high-temperature torsion forming method in the prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model discloses a hollow blade variable cross section high temperature of titanium alloy twists reverse preforming device, include: a thermoforming machine tool, a tenon clamping fixture, a twisting fixture and a deformation limiting mould;
the upper and lower working platforms of the thermoforming machine tool are composed of a heating layer, a heat-resistant ceramic layer and a water cooling layer, an electric heating rod is arranged in the heating layer for heating, and a cooling water channel is arranged on the water cooling layer for water cooling; the upper working table consists of an upper heating layer, an upper heat-resistant ceramic layer and an upper water cooling layer, the upper water cooling layer is connected with an upper hydraulic cylinder, and the upper hydraulic cylinder is fixed at the top of the support of the thermoforming machine tool; the lower working table consists of a lower heating layer, a lower heat-resistant ceramic layer and a lower water-cooling layer, the lower water-cooling layer is fixed on the column of the lower working table, the bottom of the lower working table is provided with a lower hydraulic cylinder, a lower lifting table and a lower ejector rod, and a heat insulation layer arranged around the thermoforming machine tool and the upper and lower heating layers form a closed heating space; the peripheral heat insulation layer is connected with the opening and closing cylinder, and the opening and closing of the heat insulation layer are realized through the opening and closing cylinder; the left heat insulation layer, the right heat insulation layer, the left opening and closing cylinder and the right opening and closing cylinder are respectively fixed on a support stand column of the thermoforming machine tool, the front heat insulation layer and the front opening and closing cylinder are respectively fixed on a front lifting beam, the front lifting beam is connected with the front lifting cylinder, the rear heat insulation layer and the rear opening and closing cylinder are respectively fixed on a rear lifting beam, and the rear lifting beam is connected with the rear lifting cylinder; the front lifting cylinder and the rear lifting cylinder are fixed on a support upright post of the thermoforming machine tool and drive the front lifting beam, the rear lifting beam, the front opening and closing cylinder and the rear opening and closing cylinder to move up and down, so that the front heat insulation layer and the rear heat insulation layer are lifted;
the tenon clamping fixture is used for clamping the tenon of the blade blank, is fixed in the thermoforming machine tool and comprises an upper tenon fixture and a lower tenon fixture, the upper tenon fixture is connected with the upper supporting frame, the lower tenon fixture is connected with the lower supporting frame, and the upper and lower supporting frames are respectively fixed on an upper heating layer and a lower heating layer of the thermoforming machine tool;
the blade body of the blade is clamped by a twisting clamp, a rotating shaft of the twisting clamp is parallel to the table surfaces of an upper working platform and a lower working platform of a thermoforming machine tool, the input end of the rotating shaft is connected with a twisting stepping motor arranged outside the thermoforming machine tool, the clamping end of the twisting clamp is arranged in the thermoforming machine tool, the twisting angular speed and the twisting angle of the twisting clamp are controlled by a controller, and the blade is twisted in the section of the twisting clamp under the driving of the twisting clamp;
the deformation limiting die is installed on the deformation limiting die fixing plate, the deformation limiting die fixing plate is connected with the lower lifting platform through the lower ejector rod, the lower lifting platform is connected with the lower hydraulic cylinder, the lower hydraulic cylinder drives the lower lifting platform, the lower ejector rod drives the deformation limiting die fixing plate to move up and down with the deformation limiting die, and excessive deformation generated in the blade twisting process is restrained or repaired.
Furthermore, a rectangular hole is formed in the right heat insulation layer of the thermoforming machine tool and used for installing a corrugated plate with a round hole, and the twisting clamp penetrates through the corrugated plate and moves along the length direction of the corrugated plate.
Further, install the water-cooling ring on the anchor clamps that twist reverse for prevent that heat transfer from going into to twist reverse step motor.
Furthermore, the torsion stepping motor is fixed on the two-dimensional horizontal workbench, the two-dimensional horizontal workbench is fixed on the two-dimensional horizontal workbench support, the two-dimensional horizontal workbench moves to realize the planar movement of the torsion stepping motor and the torsion clamp, and then the variable cross section and the variable torsion center torsion of the blade blank are carried out.
Further, the upper working platform comprises: the upper heating layer is connected with the upper heat-resistant ceramic layer through bolts, the upper heat-resistant ceramic layer is connected with the upper water cooling layer through bolts, and the upper water cooling layer is connected with the upper hydraulic cylinder through bolts.
Further, the lower work platform comprises: the lower heating layer is connected with the lower heat-resistant ceramic layer through bolts, the lower heat-resistant ceramic layer is connected with the lower water-cooling layer through bolts, and the lower water-cooling layer is connected with the lower workbench stand column through bolts.
The utility model has the advantages that:
the utility model discloses carry out the high temperature of aeroengine titanium alloy wide chord hollow fan blade and twist reverse the taking shape, can twist reverse the accurate torsion in the chuck realization a plurality of sections through singly to can effectively solve the blade and twist reverse the deformation problem that produces, the blade high temperature that is applicable to different torsion angle and overall dimension twists reverse the taking shape, can ensure to twist reverse the accurate assembly of back blade in follow-up finishing forming die.
Drawings
FIG. 1 is a schematic view of a high temperature torsion forming apparatus of the present invention;
FIG. 2 is a side view of the high temperature twist forming apparatus of the present invention;
FIG. 3 is a cross-sectional view of the high temperature twist forming apparatus of the present invention;
FIG. 4 is a schematic view of the internal structure of the furnace body of the high temperature torsion forming apparatus of the present invention;
FIG. 5 is a schematic view of the high temperature torsion fixture and the bottom deformation limiting mold of the present invention;
FIG. 6 is a perspective view of the blade blank and blade product design profile;
FIG. 7 is a schematic view of a torsional section and a bottom support section;
FIG. 8 is a schematic view of calculation of the torsional center and the torsional angle of the hollow blade in a plane;
FIG. 9 is a schematic view of a blade high temperature torsional deformation limiting die design.
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following examples and drawings, which are not intended to limit the present invention.
Referring to fig. 1 to 5, the utility model discloses a hollow blade variable cross section high temperature of titanium alloy twists reverse preforming device, include: a thermoforming machine tool, a tenon clamping fixture, a twisting fixture and a deformation limiting mould;
the upper and lower working platforms of the thermoforming machine tool are composed of a heating layer, a heat-resistant ceramic layer and a water cooling layer, an electric heating rod is arranged in the heating layer for heating, and a cooling water channel is arranged on the water cooling layer for water cooling; the upper working table consists of an upper heating layer 29, an upper heat-resistant ceramic layer 4 and an upper water cooling layer 30, the upper water cooling layer 30 is connected with an upper hydraulic cylinder 34, and the upper hydraulic cylinder 34 is fixed at the top of a support 32 of the thermoforming machine tool; the lower working table consists of a lower heating layer 20, a lower heat-resistant ceramic layer 19 and a lower water-cooling layer 18, the lower water-cooling layer 18 is fixed on the lower working table column 13, the bottom of the lower working table is provided with a lower hydraulic cylinder 14, a lower lifting table 16 and a lower ejector rod 15, and the heat-insulating layers arranged around the thermoforming machine tool and the upper and lower heating layers form a closed heating space; the peripheral heat insulation layer is connected with the opening and closing cylinder, and the opening and closing of the heat insulation layer are realized through the opening and closing cylinder; the left heat insulation layer 27, the right heat insulation layer 11, the left opening and closing cylinder 24 and the right opening and closing cylinder 35 are respectively fixed on a support upright column 38 of the thermoforming machine tool, the front heat insulation layer 1 and the front opening and closing cylinder 2 are respectively fixed on a front lifting beam 3, the front lifting beam 3 is connected with a front lifting cylinder 17, the rear heat insulation layer 33 and a rear opening and closing cylinder 36 are respectively fixed on a rear lifting beam 31, and the rear lifting beam 31 is connected with a rear lifting cylinder 21; the front lifting cylinder and the rear lifting cylinder are fixed on a support column 38 of the thermoforming machine tool and drive the front lifting beam, the rear lifting beam, the front opening-closing cylinder and the rear opening-closing cylinder to move up and down, so that the front heat insulation layer and the rear heat insulation layer are lifted;
the tenon clamping fixture is used for clamping the tenon of the blade blank, is fixed in a thermoforming machine tool and comprises an upper tenon fixture 26 and a lower tenon fixture 25, the upper tenon fixture 26 is connected with an upper supporting frame 28, the lower tenon fixture 25 is connected with a lower supporting frame, and the upper and lower supporting frames are respectively fixed on an upper heating layer and a lower heating layer of the thermoforming machine tool through bolts and pressing plates;
the twisting fixture 7 is used for clamping the blade body of the blade, the rotating shaft of the twisting fixture is parallel to the table surfaces of the upper working platform and the lower working platform of the thermoforming machine tool, the input end of the rotating shaft is connected with a twisting stepping motor 8 arranged outside the thermoforming machine tool, the clamping end of the twisting fixture is arranged in the thermoforming machine tool, the twisting angular speed and the twisting angle of the twisting fixture are controlled by a controller, and the blade is twisted in the section of the twisting fixture under the driving of the twisting fixture;
the deformation limiting die 12 is mounted on a deformation limiting die fixing plate 23, the deformation limiting die fixing plate 23 is connected with a lower lifting platform 16 through a lower ejector rod 15, the lower lifting platform 16 is connected with a lower hydraulic cylinder 14, the lower hydraulic cylinder 14 drives a lower lifting platform 16, the lower ejector rod 15 drives the deformation limiting die fixing plate 23 and the deformation limiting die 12 to move up and down, and excessive deformation generated in the blade twisting process is restrained or repaired.
A rectangular hole is formed in a right heat insulation layer 11 of the thermoforming machine tool and used for installing a corrugated plate 6 with a round hole, and a twisting clamp 7 penetrates through the corrugated plate and moves along the length direction of the corrugated plate.
Wherein, the twisting fixture 7 is provided with a water cooling ring 37 for preventing heat from being transferred into the twisting stepping motor 8.
The torsion stepping motor 8 is fixed on the two-dimensional horizontal workbench 9, the two-dimensional horizontal workbench 9 is fixed on the two-dimensional horizontal workbench support 10, the two-dimensional horizontal workbench 9 moves to realize the planar movement of the torsion stepping motor 8 and the torsion clamp 7, and then the variable cross section and the variable torsion center torsion of the blade blank are carried out.
Wherein, the upper working platform comprises: the ceramic heating plate comprises an upper heating layer 29, an upper heat-resistant ceramic layer 4 and an upper water cooling layer 30, wherein the upper heating layer 29 is connected with the upper heat-resistant ceramic layer 4 through bolts, the upper heat-resistant ceramic layer 4 is connected with the upper water cooling layer 30 through bolts, and the upper water cooling layer 30 is connected with an upper hydraulic cylinder 34 through bolts.
Wherein, the lower work platform comprises: the heating device comprises a lower heating layer 20, a lower heat-resistant ceramic layer 19 and a lower water-cooling layer 18, wherein the lower heating layer 20 is connected with the lower heat-resistant ceramic layer 19 through bolts, the lower heat-resistant ceramic layer 19 is connected with the lower water-cooling layer 18 through bolts, and the lower water-cooling layer 18 is connected with the lower workbench upright column 13 through bolts.
The utility model discloses a working method of titanium alloy hollow blade variable cross-section high temperature torsion preforming device, the step is as follows:
1) designing a torsion center and a torsion angle of the blade;
the neutral plane 40 of the blade is made in the three-dimensional modeling software according to the design outline 39 of the blade product, which is shown in FIG. 6; as shown in FIG. 7, a blade tenon base plane 51 of the blade product design outline 39 is made in the three-dimensional modeling software; a first bottom support section 41, a second bottom support section 42, a third bottom support section 43, a fourth bottom support section 44 and a fifth bottom support section 45 which are equidistantly parallel are taken as reference by a blade tenon bottom plane 51, and a first torsion section 46, a second torsion section 47, a third torsion section 48, a fourth torsion section 49 and a fifth torsion section 50 which are parallelly equidistant are taken between two adjacent bottom support sections; intersecting lines of the first torsional section 46, the second torsional section 47, the third torsional section 48, the fourth torsional section 49 and the fifth torsional section 50 with the neutral plane 340 of the blade are respectively drawn; the blade blank 5 and the blade product design profile 39 are moved in the three-dimensional modeling software so that the center points of the bottom surfaces of the blade tenons coincide, as shown in figure 8, a projection line 53 of the intersection line of the bottom plane 52 of the tenon of the blade blank, the middle point 52 of the center line, the fifth torsional section and the neutral plane of the blade on the plane 51 is made in the bottom plane 51 of the tenon of the blade blank, an auxiliary line 54 passing through two end points of the projection line 53 is made, an auxiliary line 55 parallel to the auxiliary line 54 and tangent to the projection line 53 is made, the auxiliary line 54 passing through two end points of the projection line 53 and a center line 56 of the auxiliary line 55 parallel to the auxiliary line 54 and tangent to the projection line 53 are made, the center line 52 and the intersection point 56 are the torsional center P in the fifth torsional section 50, and the intersection angle of the center line 56 of the auxiliary line 55 parallel to the center line 52 of the bottom plane of the tenon of the blade blank and the auxiliary line 54 and tangent to the projection line 53 is the torsional angle alpha in the fifth torsional section 50; the twisting centers and twisting angles of the first twisting section 46, the second twisting section 47, the third twisting section 48 and the fourth twisting section 49 are designed in sequence according to the above method.
2) Designing a deformation limiting mold;
a plurality of deformation limiting molds 12 are designed based on the blade product design profile 39, centering around the first bottom support section 41, the second bottom support section 42, the third bottom support section 43, the fourth bottom support section 44 and the fifth bottom support section 45, as shown in fig. 9.
3) Mounting the blade blank on a torsion clamp;
the actions of the front opening-closing cylinder 2, the rear opening-closing cylinder 36, the left opening-closing cylinder 24 and the right opening-closing cylinder 35 are controlled by air pressure, so that a front heat insulation layer 1, a rear heat insulation layer 33, a left heat insulation layer 27 and a right heat insulation layer 11 of the thermoforming machine tool are driven to be in an open state; the front lifting cylinder 17 and the rear lifting cylinder 21 are controlled to act through air pressure, and the front heat insulation layer 1 and the rear heat insulation layer 33 are driven to be in a lifting state; the upper hydraulic cylinder 34 is controlled to act through hydraulic pressure, so that the upper water cooling layer 30, the upper heat-resistant ceramic layer 4 and the upper heating layer 29 are driven to be in a lifting state; the upper support frame 28 and the lower support frame 22 are respectively fixed on the upper heating layer 29 and the lower heating layer 20 through a screw and a pressing plate by utilizing T-shaped grooves on the upper heating layer 29 and the lower heating layer 20; electric heating rods are arranged in the upper heating layer 29 and the lower heating layer 20; the upper tenon jig 26 and the upper support frame 28 are connected by bolts, and the lower tenon jig 25 and the lower support frame 22 are connected by bolts; the lower support frame 22 enables the central rotating shaft of the torsion clamp 7 to be in the same horizontal plane with the central line 52 of the bottom plane of the tenon of the blade blank; the torsion clamp 7 penetrates through a corrugated plate 6 arranged on the right heat insulation layer 11, the input end of a rotating shaft of the torsion clamp 7 is connected with a rotating shaft of a torsion stepping motor 8 through a bolt, and a water cooling ring 37 is arranged between the torsion clamp and the rotating shaft; the torsion stepping motor 8 is connected with a two-dimensional horizontal workbench 9 through a bolt, and the two-dimensional horizontal workbench 9 is fixed on a two-dimensional horizontal workbench support 10 through a bolt; the controller and the driver are used for controlling the two-dimensional horizontal workbench 9 to move, and the torsion clamp 7 is driven to move to one side of the right heat insulation layer 11 to be in contact with the right heat insulation layer; the lower hydraulic cylinder 14 is controlled to act through hydraulic pressure, the lower lifting platform 16, the lower ejector rod 15, the deformation limiting mold fixing plate 23 and the deformation limiting mold 12 are driven to move downwards until the deformation limiting mold fixing plate 23 is contacted with the lower heating layer 20; installing the blade tenon of the blade blank 5 on the lower tenon fixture 25, and driving the upper water-cooling layer 30, the upper heat-resistant ceramic layer 4, the upper heating layer 29, the upper supporting frame 28 and the upper tenon fixture 26 to move downwards by the action of the upper hydraulic cylinder 34 until the upper tenon fixture 26 and the lower tenon fixture 25 close and clamp the blade tenon of the blade blank 5; the controller and the driver are used for controlling the two-dimensional horizontal workbench 9 to move to drive the torsion clamp 7 to move towards one side of the left heat insulation layer 27, so that the chuck of the torsion clamp 7 reaches a fifth torsion section 50 at the position of the initial torsion section, and the central rotating shaft of the torsion clamp 7 is superposed with the rotating central line which passes through the point P and is vertical to the bottom plane 51 of the blade tenon; the front lifting cylinder 17 and the rear lifting cylinder 21 are controlled to act through air pressure, and the front heat insulation layer 1 and the rear heat insulation layer 33 are driven to be in a descending state; the front heat insulation layer 1, the rear heat insulation layer 33, the left heat insulation layer 27 and the right heat insulation layer 11 are driven to be in a closed state by controlling the actions of the front opening and closing cylinder 2, the rear opening and closing cylinder 36, the left opening and closing cylinder 24 and the right opening and closing cylinder 35 through air pressure.
4) Heating the blade blank;
cooling water is introduced into the upper water-cooling layer 30, the lower water-cooling layer 18 and the water-cooling ring 37; controlling the electric heating rods in the upper heating layer 29 and the lower heating layer 20 to be electrified and heated according to a set temperature-time curve by a temperature controller; and after the temperature of the blade blank reaches the designed torsional deformation temperature, preserving the heat to ensure that the temperature field in the blade is uniform.
5) Twisting the blade blank;
controlling a torsion stepping motor 8 to drive a torsion clamp 7 to rotate, and completing torsion of the blade in the fifth torsion section 50 within 10 minutes according to a uniform angular velocity, wherein the torsion angle is alpha; the torsion stepping motor 8 stops rotating and keeps locked, the torsion clamp 7 keeps still in the fifth torsion section 50, the lower hydraulic cylinder 14 is controlled to act through hydraulic pressure, the lower lifting platform 16, the lower ejector rod 15, the deformation limiting mould fixing plate 23 and the deformation limiting mould 12 are driven to move upwards until the upper surface of the deformation limiting mould 12 reaches the position where the design appearance 39 of the blade product is overlapped, and the blade torsion over-deformation is corrected; the lower hydraulic cylinder 14 is controlled to act through hydraulic pressure, the lower lifting platform 16, the lower ejector rod 15, the deformation limiting mold fixing plate 23 and the deformation limiting mold 12 are driven to move downwards, and the straight deformation limiting mold fixing plate 23 is in contact with the lower heating layer 20; controlling the two-dimensional horizontal workbench 9 to move through a controller and a driver, driving the torsion clamp 7 to move towards one side of the right heat insulation layer 11, enabling a chuck of the torsion clamp 7 to reach a fourth torsion section 49, enabling a central rotating shaft of the torsion clamp 7 to coincide with a corresponding torsion center of the fourth torsion section 49, controlling the torsion stepping motor 8 to drive the torsion clamp 7 to rotate, completing torsion of the blade in the fourth torsion section 49 within 10 minutes according to uniform angular velocity, wherein the torsion angle is the torsion angle minus angle alpha in the fourth torsion section 49 obtained in the step 1); the torsion stepping motor 8 stops rotating and keeps locking, the torsion clamp 7 keeps still in the fourth torsion section 49, the lower hydraulic cylinder 14 is controlled to act through hydraulic pressure, the lower lifting platform 16, the lower ejector rod 15, the deformation limiting mould fixing plate 23 and the deformation limiting mould 12 are driven to move upwards until the upper surface of the deformation limiting mould 12 reaches the position where the design appearance 38 of the blade product is overlapped, and the blade torsion over-deformation is corrected; the lower hydraulic cylinder 14 is controlled to act through hydraulic pressure, the lower lifting platform 16, the lower ejector rod 15, the deformation limiting mold fixing plate 23 and the deformation limiting mold 12 are driven to move downwards until the deformation limiting mold fixing plate 23 is contacted with the lower heating layer 20; and according to the steps, sequentially finishing the blade torsion and over-deformation correction in the rest torsion sections.
6) And (3) cooling: and cooling water is introduced into the upper water-cooling layer, the lower water-cooling layer and the water-cooling ring until the temperature in the thermoforming machine tool is reduced to be below 100 ℃.
7) Taking out the twisted blade;
the actions of the front opening-closing cylinder 2, the rear opening-closing cylinder 36, the left opening-closing cylinder 24 and the right opening-closing cylinder 35 are controlled by air pressure, so that a front heat insulation layer 1, a rear heat insulation layer 33, a left heat insulation layer 27 and a right heat insulation layer 11 of the thermoforming machine tool are driven to be in an open state; the front lifting cylinder 17 and the rear lifting cylinder 21 are controlled to act through air pressure, and the front heat insulation layer 1 and the rear heat insulation layer 33 are driven to be in a lifting state; the upper hydraulic cylinder 34 is controlled to act through hydraulic pressure, the upper water cooling layer 30, the upper heat insulation layer 4, the upper heating layer 29, the upper support frame 28 and the upper tenon clamp 26 are driven to move upwards, and the twisted blade is taken out.
The utility model discloses the concrete application way is many, and the above-mentioned only is the preferred embodiment of the utility model, should point out, to ordinary skilled person in this technical field, under the prerequisite that does not deviate from the utility model discloses the principle, can also make a plurality of improvements, and these improvements also should be regarded as the utility model discloses a scope of protection.
Claims (5)
1. A titanium alloy hollow blade variable cross-section high-temperature torsion preforming device is characterized by comprising: a thermoforming machine tool, a tenon clamping fixture, a twisting fixture and a deformation limiting mould;
the upper and lower working platforms of the thermoforming machine tool are composed of a heating layer, a heat-resistant ceramic layer and a water cooling layer, an electric heating rod is arranged in the heating layer for heating, and a cooling water channel is arranged on the water cooling layer for water cooling; the upper working table consists of an upper heating layer, an upper heat-resistant ceramic layer and an upper water cooling layer, the upper water cooling layer is connected with an upper hydraulic cylinder, and the upper hydraulic cylinder is fixed at the top of the support of the thermoforming machine tool; the lower working table consists of a lower heating layer, a lower heat-resistant ceramic layer and a lower water-cooling layer, the lower water-cooling layer is fixed on the column of the lower working table, the bottom of the lower working table is provided with a lower hydraulic cylinder, a lower lifting table and a lower ejector rod, and a heat insulation layer arranged around the thermoforming machine tool and the upper and lower heating layers form a closed heating space; the peripheral heat insulation layer is connected with the opening and closing cylinder, and the opening and closing of the heat insulation layer are realized through the opening and closing cylinder; the left heat insulation layer, the right heat insulation layer, the left opening and closing cylinder and the right opening and closing cylinder are respectively fixed on a support stand column of the thermoforming machine tool, the front heat insulation layer and the front opening and closing cylinder are respectively fixed on a front lifting beam, the front lifting beam is connected with the front lifting cylinder, the rear heat insulation layer and the rear opening and closing cylinder are respectively fixed on a rear lifting beam, and the rear lifting beam is connected with the rear lifting cylinder; the front lifting cylinder and the rear lifting cylinder are fixed on a support upright post of the thermoforming machine tool and drive the front lifting beam, the rear lifting beam, the front opening-closing cylinder and the rear opening-closing cylinder to move up and down;
the tenon clamping fixture is used for clamping the tenon of the blade blank, is fixed in the thermoforming machine tool and comprises an upper tenon fixture and a lower tenon fixture, the upper tenon fixture is connected with the upper supporting frame, the lower tenon fixture is connected with the lower supporting frame, and the upper and lower supporting frames are respectively fixed on an upper heating layer and a lower heating layer of the thermoforming machine tool;
the blade body of the blade is clamped by a twisting clamp, a rotating shaft of the twisting clamp is parallel to the table surfaces of an upper working platform and a lower working platform of a thermoforming machine tool, the input end of the rotating shaft is connected with a twisting stepping motor arranged outside the thermoforming machine tool, the clamping end of the twisting clamp is arranged in the thermoforming machine tool, the twisting angular speed and the twisting angle of the twisting clamp are controlled by a controller, and the blade is twisted in the section of the twisting clamp under the driving of the twisting clamp;
the deformation limiting die is installed on the deformation limiting die fixing plate, the deformation limiting die fixing plate is connected with the lower lifting platform through the lower ejector rod, the lower lifting platform is connected with the lower hydraulic cylinder, the lower hydraulic cylinder drives the lower lifting platform, and the lower ejector rod drives the deformation limiting die fixing plate and the deformation limiting die to move up and down.
2. The titanium alloy hollow blade variable cross-section high-temperature torsion preforming device as claimed in claim 1, wherein a rectangular hole is formed in a right heat insulation layer of the thermoforming machine tool and used for installing a corrugated plate with a circular hole, and the torsion clamp penetrates through the corrugated plate and moves in the length direction of the corrugated plate.
3. The titanium alloy hollow blade variable-section high-temperature torsion preforming device as claimed in claim 1, wherein the torsion stepping motor is fixed on a two-dimensional horizontal workbench, the two-dimensional horizontal workbench is fixed on a support of the two-dimensional horizontal workbench, and the two-dimensional horizontal workbench moves to realize the planar movement of the torsion stepping motor and the torsion clamp, so that the variable-section and variable-torsion center torsion of the blade blank is performed.
4. The titanium alloy hollow blade variable cross-section high temperature torsion preforming device according to claim 1, wherein the upper working platform comprises: the upper heating layer is connected with the upper heat-resistant ceramic layer through bolts, the upper heat-resistant ceramic layer is connected with the upper water cooling layer through bolts, and the upper water cooling layer is connected with the upper hydraulic cylinder through bolts.
5. The titanium alloy hollow blade variable cross-section high temperature torsion preforming device according to claim 1, wherein the lower working platform comprises: the lower heating layer is connected with the lower heat-resistant ceramic layer through bolts, the lower heat-resistant ceramic layer is connected with the lower water-cooling layer through bolts, and the lower water-cooling layer is connected with the lower workbench stand column through bolts.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113857346A (en) * | 2021-09-26 | 2021-12-31 | 北京航空航天大学 | Hollow blade thermal forming method and hollow blade inflating device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113857346A (en) * | 2021-09-26 | 2021-12-31 | 北京航空航天大学 | Hollow blade thermal forming method and hollow blade inflating device |
| CN113857346B (en) * | 2021-09-26 | 2024-01-09 | 北京航空航天大学 | Hollow blade thermoforming method and hollow blade inflation device |
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