CN113878013A - Isothermal extrusion process for titanium alloy profile - Google Patents
Isothermal extrusion process for titanium alloy profile Download PDFInfo
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- CN113878013A CN113878013A CN202111192921.9A CN202111192921A CN113878013A CN 113878013 A CN113878013 A CN 113878013A CN 202111192921 A CN202111192921 A CN 202111192921A CN 113878013 A CN113878013 A CN 113878013A
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- titanium alloy
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/022—Stamping using rigid devices or tools by heating the blank or stamping associated with heat treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
- B21D22/025—Stamping using rigid devices or tools for tubular articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/01—Selection of materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/14—Particular arrangements for handling and holding in place complete dies
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/16—Heating or cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/02—Advancing work in relation to the stroke of the die or tool
- B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
- B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
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- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
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- Thermal Sciences (AREA)
- Forging (AREA)
- Extrusion Of Metal (AREA)
Abstract
The invention relates to a titanium alloy profiled bar isothermal extrusion process, which belongs to the technical field of metal material forming, and comprises the steps of heating a titanium alloy blank, heating a die, automatically discharging, performing isothermal extrusion and automatically taking materials, wherein the steps of preheating the titanium alloy blank and the forming die respectively, and then keeping the temperature of the titanium alloy blank constant in the extrusion forming process by using an isothermal mechanism are adopted, so that the problem of uneven deformation caused by large temperature difference between the surface and the core when the titanium alloy blank is subjected to extrusion forming in the prior art is solved, the titanium alloy blank is subjected to extrusion treatment after being preheated, the stress resistance of the titanium alloy blank is improved, the defects that the titanium alloy blank is easy to crack and form unevenly under the action of a compression bar are effectively avoided, in addition, the titanium alloy blank adopts a hollow tubular titanium alloy blank, so that the titanium alloy blank is not easy to stack in the processing process, the utilization rate of the titanium alloy blank is improved.
Description
Technical Field
The invention belongs to the technical field of metal material forming, and particularly relates to an isothermal extrusion process for a titanium alloy profiled bar.
Background
Titanium alloys are widely used in medical, aerospace, military, automotive and electronic product manufacturing industries due to their low density, high strength and corrosion resistance. Parts in electronic products are different in shape, so that processing is more difficult, and the casting process of the titanium alloy is not mature enough, so that the product performance cannot be ensured, and therefore, the extrusion process is a better choice for the production of special-shaped parts.
However, because the titanium alloy has low heat conductivity, the temperature difference between the surface temperature and the core temperature of the titanium alloy blank is large, the titanium alloy blank is easy to deform unevenly, and the material is easy to crack and form unevenly under the action of stress.
Disclosure of Invention
The invention aims to provide an isothermal extrusion process for a titanium alloy profile, which solves the problems that the titanium alloy blank is not uniformly deformed due to large temperature difference between the surface and the core of the titanium alloy blank, the material is more easily cracked under the action of stress, and the forming is not uniform in the prior art.
The purpose of the invention can be realized by the following technical scheme:
the isothermal extrusion process of the titanium alloy profile comprises the following steps:
step S1, heating the titanium alloy blank: placing the titanium alloy blank on a clamping mechanism, and extending the clamping mechanism into a heating furnace to heat the titanium alloy blank;
step S2, mold heating: installing a forming die in the isothermal mechanism, and heating the forming die;
step S3, automatic discharging: moving the clamping mechanism from the heating furnace to the inside of the isothermal mechanism, and putting the titanium alloy blank in the clamping mechanism into the forming die;
step S4, isothermal extrusion: closing the isothermal mechanism through a material pressing mechanism, and then performing closed heat preservation and pressure maintaining on the forming dies to complete extrusion forming of the titanium alloy blank;
step S5, automatic material taking: and resetting the pressing mechanism, opening the isothermal mechanism, and taking out the titanium alloy molded part in the molding die by using the clamping mechanism to finish isothermal extrusion processing of the titanium alloy profiled bar.
Preferably, the titanium alloy blank is a hollow pipe titanium alloy blank, and the titanium alloy blank is heated to 880-900 ℃.
Preferably, the forming die is installed through a die changing mechanism, and the forming die is heated to 580-620 ℃.
Preferably, the forming die is made of K403 nickel-based superalloy.
Preferably, a heater and a temperature sensor are arranged in the isothermal mechanism, and the heater and the temperature sensor are both electrically connected with the relay through conducting wires.
Preferably, the isothermal extrusion process for the titanium alloy profile adopts integrated processing equipment for processing, the integrated processing equipment comprises a rack and a support located in the middle of the rack, a material pressing mechanism is arranged at the top of the rack, an isothermal mechanism is arranged at the bottom of the rack, a forming die is arranged inside the isothermal mechanism, and a clamping mechanism and a die changing mechanism are respectively arranged on two sides inside the support.
Preferably, the isothermal mechanism comprises an upper isothermal cover and a lower isothermal cover, two sides of the upper isothermal cover are fixedly connected with the bottom of the movable frame through bolts, the bottom of the lower isothermal cover is fixedly connected with the bottom of the frame, a closed ring is arranged at the bottom of the upper isothermal cover, the peripheral surface of the closed ring is matched with the inside of the lower isothermal cover, the titanium alloy blank is placed into the forming die when the upper isothermal cover and the lower isothermal cover are separated, and then the upper isothermal cover and the lower isothermal cover are closed through a material pressing mechanism, so that isothermal extrusion forming processing of the titanium alloy blank is realized;
the inner wall of the upper isothermal cover and the inner wall of the lower isothermal cover are both provided with a heat insulation pad, the top of the upper isothermal cover inner wall is provided with a first mounting frame, the bottom of the first mounting frame is fixedly connected with the top of the pressure rod through a connecting assembly, the bottom of the lower isothermal cover inner wall is provided with a second mounting frame, the top of the second mounting frame is provided with a placing groove matched with a female die, the female die is located inside the placing groove, and an electric heating wire is arranged below the inside of the second mounting frame and the placing groove.
Preferably, in step S2, the step of installing and heating the molding die is as follows:
placing the top of the pressure lever into the bottom of the first mounting frame, connecting the thread block with the first mounting frame in a threaded manner, and matching one side of the connecting block with a connecting groove on the side surface of the pressure lever to finish the mounting of the pressure lever in the first mounting frame;
then an electric push rod driving shaft in the die changing mechanism is pressed downwards, two servo electric cylinder two driving shafts in the fixing frame move to drive two clamping jaws to be matched with connecting grooves on two sides of the female die, the movable frame is moved to the left side in the support to be above the lower isothermal cover, the fixing frame descends, the clamping jaws are removed from being matched with the connecting grooves, the female die is placed in the placing groove, and the female die is installed in the mounting frame two;
and a driving shaft of the hydraulic cylinder is pressed downwards to drive the movable frame and the upper isothermal cover to move downwards until the upper isothermal cover and the lower isothermal cover are matched, an electric heating wire power switch in the second mounting frame is opened, the heating temperature of the electric heating wire is set to be 600 ℃, the temperature is kept for 10-15min, and the heating of the forming die is completed.
Preferably, swager constructs including the pneumatic cylinder that is located the frame top, the one end of pneumatic cylinder drive shaft runs through frame and fixedly connected with adjustable shelf, the both sides at adjustable shelf top all are provided with the slide bar, the both sides at frame top all are provided with the sliding sleeve, the top of two slide bars respectively with the inside sliding connection of two sliding sleeves, the frame is inside all be provided with the carriage all around, and the equal sliding connection in one side of four carriages has the sliding block, four sliding block one side all with the side fixed connection of adjustable shelf, utilize the surface slip of four sliding blocks at four carriages, guarantee the stability of adjustable shelf at the downward displacement in-process, and then improve isothermal cover and the accuracy nature of complex between the isothermal cover down.
Preferably, in step S4, the extrusion molding step of the titanium alloy billet is as follows:
the clamping mechanism sends the heated titanium alloy blank into the female die and then resets, the driving shaft of the hydraulic cylinder presses downwards to enable the port of the upper isothermal cover to be in contact with the closed ring at the bottom of the lower isothermal cover, pre-closing between the upper isothermal cover and the lower isothermal cover is completed, the bottom end of the pressure rod applies pressure to the titanium alloy blank in the female die, the temperature of the female die is kept at 600 ℃ by the electric heating wire, the driving shaft of the hydraulic rod continues to apply pressure until the upper isothermal cover and the lower isothermal cover are completely closed, heating is kept for 5-6min, and extrusion forming of the titanium alloy blank is completed.
The invention has the beneficial effects that:
(1) the titanium alloy blank and the forming die are respectively preheated, then the temperature of the titanium alloy blank is kept constant in the extrusion forming process in the forming die by utilizing the isothermal mechanism, the problem of uneven deformation caused by poor temperature difference between the surface and the core when the titanium alloy blank is subjected to extrusion forming in the prior art is solved, the titanium alloy blank is subjected to extrusion treatment after being preheated, the stress resistance of the titanium alloy blank is improved, the defects that the titanium alloy blank is easy to crack and is not uniformly formed under the action of a compression bar are effectively overcome, in addition, the titanium alloy blank adopts a hollow tube titanium alloy blank, the titanium alloy blank is not easy to stack in the processing process, and the utilization rate of the titanium alloy blank is improved.
(2) Through setting up fixture and retooling mechanism, utilize servo electric cylinder one to drive the movable claw and contract, the movable claw carries out the centre gripping to the titanium alloy blank, fixture displacement on the support realizes the heat treatment to the titanium alloy blank in the heating furnace, with the inside of titanium alloy blank transfer to isothermal mechanism in the heating furnace to and take out the titanium alloy formed part from the automation in forming die, utilize two jack catchs to the forming die in the inside of isothermal mechanism tear open and trade, improved the work efficiency of whole equipment effectively, and equipment operation management is simple.
(3) The upper isothermal cover is driven by the pressing mechanism, sliding blocks are arranged on two sides of the movable frame and slide on the sliding frame, stability of the upper isothermal cover in the displacement process is guaranteed, matching accuracy between the upper isothermal cover and the lower isothermal cover is improved, the titanium alloy blank is placed into a forming die when the upper isothermal cover and the lower isothermal cover are separated, then the upper isothermal cover and the lower isothermal cover are closed by the pressing mechanism, and isothermal extrusion forming processing of the titanium alloy blank is achieved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of an isothermal extrusion process of a titanium alloy profile according to the present invention;
FIG. 2 is a schematic view of the structure of an integrated processing apparatus according to the present invention;
FIG. 3 is a cross-sectional view of the upper isothermal closure structure of the present invention;
FIG. 4 is an enlarged view of the structure of FIG. 3A in accordance with the present invention;
FIG. 5 is a cross-sectional view of the lower isothermal housing structure of the present invention;
FIG. 6 is a top view of the stent structure of the present invention;
FIG. 7 is a schematic view of the clamping mechanism of the present invention;
FIG. 8 is a schematic view of the die change mechanism configuration of the present invention;
FIG. 9 is a schematic view of a first perspective structure of a forming mold according to the present invention;
FIG. 10 is a second perspective view of the forming mold of the present invention.
In the drawings, the components represented by the respective reference numerals are listed below:
10. a frame; 20. a support; 30. a movable frame; 40. an electric push rod; 11. a hydraulic cylinder; 12. a movable frame; 13. a slide bar; 14. a sliding sleeve; 15. a carriage; 16. a slider; 21. an upper isothermal cage; 22. a lower isothermal cage; 23. a closed ring; 24. a heat insulating pad; 25. a first mounting frame; 26. a second mounting frame; 27. a placement groove; 28. an electric heating wire; 31. a female die; 32. a pressure lever; 33. connecting grooves; 41. connecting blocks; 42. a thread block; 43. rotating the block; 51. a connecting frame; 52. a first servo electric cylinder; 53. a movable jaw; 61. a fixed mount; 62. a claw; 63. and a second servo electric cylinder.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-10, the present invention is an isothermal extrusion process for titanium alloy profiled bars, comprising the following steps:
step S1, heating the titanium alloy blank: placing the titanium alloy blank on a clamping mechanism, and extending the clamping mechanism into a heating furnace to heat the titanium alloy blank;
step S2, mold heating: installing a forming die in the isothermal mechanism, and heating the forming die;
the mounting and heating steps of the forming die are as follows:
placing the top of the pressure lever 32 into the bottom of the first mounting frame 25, connecting the thread block 42 with the first mounting frame 25 in a threaded manner, and matching one side of the connecting block 41 with the connecting groove 33 on the side surface of the pressure lever 32 to complete the installation of the pressure lever 32 in the first mounting frame 25;
then, a driving shaft of an electric push rod 40 in the die changing mechanism is pressed downwards, a driving shaft of two servo electric cylinders II 63 in the fixed frame 61 moves to drive two clamping jaws 62 to be matched with connecting grooves 33 on two sides of the female die 31, the movable frame 30 moves to the left side in the support 20 to be above the lower isothermal cover 22, the fixed frame 61 descends, the clamping jaws 62 are disengaged from the connecting grooves 33, the female die 31 is placed in the placing groove 27, and the female die 31 is installed in the mounting frame II 26;
a driving shaft of the hydraulic cylinder 11 is pressed downwards to drive the movable frame 12 and the upper isothermal cover 21 to move downwards until the upper isothermal cover 21 and the lower isothermal cover 22 are matched, an electric switch of an electric heating wire 28 in the second mounting frame 26 is opened, the heating temperature of the electric heating wire 28 is set to be 600 ℃, the electric heating wire is kept for 15min, and heating of the forming die is completed;
step S3, automatic discharging: moving the clamping mechanism from the heating furnace to the inside of the isothermal mechanism, and putting the titanium alloy blank in the clamping mechanism into the forming die;
step S4, isothermal extrusion: closing the isothermal mechanism through a material pressing mechanism, and then performing closed heat preservation and pressure maintaining on the forming dies to complete extrusion forming of the titanium alloy blank;
the extrusion molding steps of the titanium alloy blank are as follows:
the clamping mechanism resets after sending the heated titanium alloy blank into the female die 31, the hydraulic cylinder 11 drives the shaft to press downwards to make the port of the upper isothermal cover 21 contact with the closed ring 23 at the bottom of the lower isothermal cover 22 to complete the pre-closing between the upper isothermal cover 21 and the lower isothermal cover 22, the bottom end of the pressure lever 32 applies pressure to the titanium alloy blank in the female die 31, the electric heating wire 28 keeps the temperature of the female die 31 at 600 ℃, the hydraulic lever 32 drives the shaft to continue to apply pressure until the space between the upper isothermal cover 21 and the lower isothermal cover 22 is completely closed, the heating is kept for 6min, and the extrusion forming of the titanium alloy blank is completed;
step S5, automatic material taking: and resetting the pressing mechanism, opening the isothermal mechanism, and taking out the titanium alloy molded part in the molding die by using the clamping mechanism to finish isothermal extrusion processing of the titanium alloy profiled bar.
Referring to fig. 2, the isothermal extrusion process for titanium alloy profiled bars adopts an integrated processing device for processing, the integrated processing device includes a frame 10 and a support 20 located in the middle of the frame 10, a pressing mechanism is disposed at the top of the frame 10, an isothermal mechanism is disposed at the bottom of the frame 10, a forming mold is mounted inside the isothermal mechanism, and a clamping mechanism and a mold changing mechanism are respectively disposed on two sides inside the support 20;
the material pressing mechanism comprises a hydraulic cylinder 11 located at the top of the rack 10, one end of a driving shaft of the hydraulic cylinder 11 penetrates through the rack 10 and is fixedly connected with a movable frame 12, slide rods 13 are arranged on two sides of the top of the movable frame 12, slide sleeves 14 are arranged on two sides of the top of the rack 10, the top ends of the two slide rods 13 are respectively in sliding connection with the insides of the two slide sleeves 14, sliding frames 15 are arranged on the periphery of the inside of the rack 10, slide blocks 16 are respectively in sliding connection with one sides of the four sliding frames 15, one sides of the four slide blocks 16 are fixedly connected with the side faces of the movable frame 12, and the four slide blocks 16 slide on the surfaces of the four sliding frames 15, so that the stability of the movable frame 12 in the downward displacement process is ensured, and the matching accuracy between the upper isothermal cover 21 and the lower isothermal cover 22 is further improved;
referring to fig. 3-5, the isothermal mechanism includes an upper isothermal cover 21 and a lower isothermal cover 22, both sides of the upper isothermal cover 21 are fixedly connected with the bottom of the movable frame 12 through bolts, the bottom of the lower isothermal cover 22 is fixedly connected with the bottom of the rack 10, a closed ring 23 is arranged at the bottom of the upper isothermal cover 21, the peripheral surface of the closed ring 23 is matched with the inside of the lower isothermal cover 22, when the upper isothermal cover 21 and the lower isothermal cover 22 are separated, a titanium alloy blank is placed into a forming die, and then the upper isothermal cover 21 and the lower isothermal cover 22 are closed by using a pressing mechanism, so as to realize isothermal processing of the titanium alloy blank;
the inner walls of the upper isothermal cover 21 and the lower isothermal cover 22 are provided with heat insulation pads 24, the top of the inner wall of the upper isothermal cover 21 is provided with a first mounting frame 25, the bottom of the first mounting frame 25 is fixedly connected with the top of the pressure rod 32 through a connecting assembly, the bottom of the inner wall of the lower isothermal cover 22 is provided with a second mounting frame 26, the top of the second mounting frame 26 is provided with a placing groove 27 matched with the female die 31, the female die 31 is located inside the placing groove 27, an electric heating wire 28 is arranged inside the second mounting frame 26 and below the placing groove 27, a temperature sensor is arranged inside the lower isothermal cover 22, the temperature sensor is electrically connected with a relay through a wire, and the relay is connected with the electric heating wire 28 through a wire;
the connecting assembly comprises a connecting block 41 matched with the connecting groove 33, a thread block 42 is in threaded connection with one side of the first mounting frame 25, a rotating block 43 is arranged at one end of the thread block 42, and one side of the rotating block 43 is rotatably connected with one side of the connecting block 41;
referring to fig. 9-10, the forming mold includes a concave mold 31 and a pressing rod 32, the pressing rod 32 is located inside the upper isothermal cover 21, the concave mold 31 is located inside the lower isothermal cover 22, the surfaces of the concave mold 31 and the pressing rod 32 are both provided with a connecting groove 33, the insides of the concave mold 31 and the pressing rod 32 are both provided with forming grooves, and the bottom of the concave mold 31 is provided with a through hole adapted to the pressing rod 32;
referring to fig. 6-8, the movable frame 30 is slidably disposed on both sides of the inside of the support 20, the linear slide rail and the linear motor are disposed on both sides of the inner wall of the support 20, the linear motor slides on the surface of the linear slide rail, one side of each of the two linear motors is fixedly connected to both sides of the movable frame 30, and the top of the two moving frames 30 are provided with the electric push rod 40, the clamping mechanism comprises the moving frame 30 and the electric push rod 40 which are positioned at the left side inside the bracket 20, a connecting frame 51 is arranged below the moving frame 30, a servo cylinder I52 is arranged in the connecting frame 51, a movable claw 53 is arranged below the connecting frame 51, the interior of the movable claw 53 is movably connected with one end of a first servo electric cylinder 52 driving shaft through a connecting piece, the connecting piece is a positioning frame sleeved on the surface of the first servo electric cylinder 52 driving shaft, and two ends of the positioning frame are both connected with the interior of the movable claw 53 in a sliding manner;
the die change mechanism comprises a moving frame 30 and an electric push rod 40 which are located on the right side inside a support 20, a fixed frame 61 is arranged at the bottom of the moving frame 30, clamping jaws 62 are movably arranged on two sides of the fixed frame 61, two servo electric cylinders 63 are symmetrically arranged inside the fixed frame 61, one ends of driving shafts of the two servo electric cylinders 63 are fixedly connected with one ends of the two clamping jaws 62 respectively, and the bottom ends of the two clamping jaws 62 are matched with the inside of a connecting groove 33.
And those not described in detail in this specification are well within the skill of those in the art.
The working principle of the invention is as follows:
when the device is used, a titanium alloy blank is placed into the movable claw 53, the first servo electric cylinder 52 driving shaft resets, the movable claw 53 clamps the titanium alloy blank, the electric push rod 40 driving shaft extends out, and the titanium alloy blank in the movable claw 53 is sent into a heating furnace to be heated to 900 ℃;
putting the top of the pressure lever 32 into the bottom of the first mounting frame 25, connecting the thread block 42 with the first mounting frame 25 in a threaded manner, matching one side of the connecting block 41 with the connecting groove 33 on the side surface of the pressure lever 32 to complete the installation of the pressure lever 32 in the first mounting frame 25, then pressing down the driving shaft of the electric push rod 40 in the die changing mechanism, driving the driving shafts of the two servo electric cylinders II 63 in the fixing frame 61 to move to drive the two clamping jaws 62 to be matched with the connecting grooves 33 on the two sides of the female die 31, moving the moving frame 30 to the left in the support 20 to be moved to the upper side of the lower isothermal cover 22, descending the fixing frame 61, releasing the matching between the clamping jaws 62 and the connecting grooves 33, putting the female die 31 into the placing groove 27, and completing the installation of the female die 31 in the second mounting frame 26;
a driving shaft of the hydraulic cylinder 11 is pressed downwards to drive the movable frame 12 and the upper isothermal cover 21 to move downwards until the upper isothermal cover 21 and the lower isothermal cover 22 are matched, an electric switch of an electric heating wire 28 in the second mounting frame 26 is opened, the heating temperature of the electric heating wire 28 is set to be 600 ℃, the electric heating wire is kept for 15min, and heating of the forming die is completed;
the clamping mechanism returns the heated titanium alloy blank after sending the heated titanium alloy blank into the female die 31, the hydraulic cylinder 11 drives the shaft to press downwards to enable the port of the upper isothermal cover 21 to be in contact with the closed ring 23 at the bottom of the lower isothermal cover 22, so that the pre-closing between the upper isothermal cover 21 and the lower isothermal cover 22 is completed, the bottom end of the pressure rod 32 applies pressure to the titanium alloy blank in the female die 31, the electric heating wire 28 keeps the temperature of the female die 31 at 600 ℃, the hydraulic rod 32 drives the shaft to continue to apply pressure until the space between the upper isothermal cover 21 and the lower isothermal cover 22 is completely closed, the heating is kept for 6min, and finally the movable claw 53 takes out the formed titanium alloy profiled bar from the female die 31 to complete the extrusion forming processing of the titanium alloy blank.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is merely exemplary and illustrative of the principles of the present invention and various modifications, additions and substitutions of the specific embodiments described herein may be made by those skilled in the art without departing from the principles of the present invention or exceeding the scope of the claims set forth herein.
Claims (7)
1. The isothermal extrusion process of the titanium alloy profile is characterized by comprising the following steps: the method comprises the following steps:
step S1, heating the titanium alloy blank: placing the titanium alloy blank on a clamping mechanism, and extending the clamping mechanism into a heating furnace to heat the titanium alloy blank;
step S2, mold heating: installing a forming die in the isothermal mechanism, and heating the forming die;
step S3, automatic discharging: moving the clamping mechanism from the heating furnace to the inside of the isothermal mechanism, and putting the titanium alloy blank in the clamping mechanism into the forming die;
step S4, isothermal extrusion: closing the isothermal mechanism through a material pressing mechanism, and then performing closed heat preservation and pressure maintaining on the forming dies to complete extrusion forming of the titanium alloy blank;
step S5, automatic material taking: and resetting the pressing mechanism, opening the isothermal mechanism, and taking out the titanium alloy molded part in the molding die by using the clamping mechanism to finish isothermal extrusion processing of the titanium alloy profiled bar.
2. A titanium alloy profile isothermal extrusion process according to claim 1, wherein: the titanium alloy blank adopts a hollow pipe titanium alloy blank, and the titanium alloy blank is heated to 880-900 ℃.
3. A titanium alloy profile isothermal extrusion process according to claim 1, wherein: the forming die is installed through a die changing mechanism, and the forming die is heated to 580-620 ℃.
4. A titanium alloy profile isothermal extrusion process according to claim 1, wherein: the forming die adopts K403 nickel-based high-temperature alloy.
5. A titanium alloy profile isothermal extrusion process according to claim 1, wherein: the isothermal mechanism is internally provided with a heater and a temperature sensor, and the heater and the temperature sensor are electrically connected with the relay through leads.
6. A titanium alloy profile isothermal extrusion process according to claim 1, wherein: the mounting and heating steps of the forming die are as follows:
putting the top of the pressure lever (32) into the bottom of the first mounting frame (25), and matching one side of the connecting block (41) with a connecting groove (33) on the side surface of the pressure lever (32) to finish the mounting of the pressure lever (32);
the electric push rod (40) drives a shaft to be pressed downwards, the two clamping jaws (62) are matched with the two connecting grooves (33), the moving frame (30) is displaced to the upper part of the lower isothermal cover (22) in the support (20), the concave die (31) is placed in the placing groove (27), and the concave die (31) is installed;
the movable frame (12) and the upper isothermal cover (21) move downwards, the upper isothermal cover (21) and the lower isothermal cover (22) are matched, an electric switch of an electric heating wire (28) in the second mounting frame (26) is turned on, the heating temperature of the electric heating wire (28) is set to be 600 ℃, the temperature is kept for 10-15min, and the molding die is heated.
7. A titanium alloy profile isothermal extrusion process according to claim 1, wherein: the extrusion forming steps of the titanium alloy blank are as follows:
the clamping mechanism conveys the heated titanium alloy blank into a female die (31) and then resets, a hydraulic cylinder (11) drives a shaft to press downwards, the port of an upper isothermal cover (21) is in contact with a closed ring (23) at the bottom of a lower isothermal cover (22), pre-closing between the upper isothermal cover (21) and the lower isothermal cover (22) is completed, the bottom end of a pressure rod (32) applies pressure to the titanium alloy blank in the female die (31), an electric heating wire (28) keeps the temperature of the female die (31) at 600 ℃, the driving shaft of a hydraulic rod (32) continues to apply pressure until the space between the upper isothermal cover (21) and the lower isothermal cover (22) is completely closed, heating is kept for 5-6min, and extrusion forming of the titanium alloy blank is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115625244A (en) * | 2022-12-22 | 2023-01-20 | 成立航空技术(成都)有限公司 | Aerospace TC4 titanium alloy sheet metal part heat preservation hot stamping equipment |
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