CN111085591B - Tool for spin forming of complex curved bus component and use method thereof - Google Patents
Tool for spin forming of complex curved bus component and use method thereof Download PDFInfo
- Publication number
- CN111085591B CN111085591B CN201911353009.XA CN201911353009A CN111085591B CN 111085591 B CN111085591 B CN 111085591B CN 201911353009 A CN201911353009 A CN 201911353009A CN 111085591 B CN111085591 B CN 111085591B
- Authority
- CN
- China
- Prior art keywords
- die
- flange
- conical
- mold
- clamping
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- B21D22/14—Spinning
-
- 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
- B21D37/10—Die sets; Pillar guides
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
A tool for spin forming of a complex curved bus member and a use method thereof. The tool comprises a die clamping and fixing unit, a first hydraulic cylinder, a sliding rail and a second hydraulic cylinder. The lower end of the first hydraulic cylinder is clamped on the upper surface of the slide rail through a slide block; the second hydraulic cylinder is arranged on one side surface of the sliding block; the first hydraulic cylinder and the second hydraulic cylinder are perpendicular to each other. And a die clamping and fixing unit is arranged on the upper end face of the first hydraulic cylinder. The invention can realize the automatic loading and unloading of the numerical control spinning processing die to shorten the loading and unloading time of the die, thereby reducing the production cost, the labor intensity of workers and the danger coefficient, effectively preventing the abrasion of a machine tool, improving the installation precision of the die, and being beneficial to further effectively improving the automation, integration and digitization of the processing procedure of the numerical control spinning forming manufacturing industry.
Description
Technical Field
The invention relates to the technical field of mechanical manufacturing and automation thereof, and particularly provides a tool for spin forming of an aluminum alloy thin-wall complex curved bus member and a using method thereof.
Background
Spinning is an advanced metal labor-saving near-net-plasticity forming method, and is suitable for forming and manufacturing various metal materials due to the advantages of good flexibility, high efficiency, low cost, simple process and equipment and the like; meanwhile, compared with the raw materials, the hardness, tensile strength and yield strength of the parts manufactured by spinning processing are also improved, and the service performance of the parts is excellent, so that the spinning not only plays an important role in high-end industries such as aviation, aerospace, navigation and weaponry, but also is widely applied to civil fields such as automobiles, chemical engineering, musical instruments and kitchenware.
The one-time complete numerical control spinning processing process in a factory mainly comprises the following steps: production preparation, die installation, machining program debugging, spinning machining, die disassembly and product inspection. At present, the installation and the disassembly of the die in the production mainly depend on workers and manual operation by means of a lifting appliance, however, the installation and the disassembly of the die in the whole spinning production often occupy a large amount of time, particularly in the spinning production of large parts, the quality and the volume of the die are large, the installation and the disassembly of the die need to consume a large amount of working time, and the factors obviously reduce the production efficiency. On the other hand, frequent repeated mounting and dismounting of the spinning die also increases the labor intensity of workers, and particularly, the labor intensity of manual operation is greatly increased and the operation danger is inevitably increased when the large-scale spinning die is mounted and dismounted. Secondly, in the process of butt joint installation of the spinning die and a main shaft of a numerical control machine tool, repeated pose adjustment is needed for many times, and repeated assembly inevitably causes abrasion of the main shaft, so that the precision of the machine tool is reduced. Currently, "digital manufacturing and intelligent manufacturing" gradually become the inevitable direction of industrial development, and the problems of improving production efficiency, saving production cost and reducing labor intensity and danger of workers in the numerical control spinning processing industry are already the problems to be solved urgently.
At present, most of automatic die loading and unloading devices are concentrated in other machining fields, and the development of automatic die loading and unloading tools and application methods thereof for numerical control spinning machine tools is urgently needed.
The invention patent publication No. CN108817297A discloses a hot forging apparatus with auxiliary mold loading and unloading, in which a loading and unloading robot is used to load and unload the auxiliary mold. The utility model discloses a convenient to detach's aluminium extruder mould structure in utility model patent that publication number is CN207695346U belongs to aluminium alloy processing equipment field, mainly is the inconvenient problem of solution aluminium extruder mould change loading and unloading. The utility model discloses a special device for loading and unloading an extruder die in utility model patent with publication number CN202212748U, the main structure of which comprises a motor, a rocker arm frame, a rocker arm and a vertical rod, thereby conveniently realizing the die disassembly of the extruder. The invention patent with the publication number of CN107377745A discloses a numerical control punching die with an easy-to-assemble and disassemble device, and the functionality and the practicability of the die are greatly improved by arranging a transverse assembling groove and a longitudinal assembling groove with a built-in limiting turnover plate on the outer side wall. The invention patent with the publication number of CN106670398A discloses an automatic mold loading and unloading system of a core shooter, and the automatic mold loading and unloading system can realize the automatic mold loading and unloading in the whole process from a mold warehouse to the core shooter by arranging an AGV trolley to construct a mold loading trolley. The invention discloses a plastic forming die loading and unloading machine in patent publication No. CN107214913A, and provides a full-automatic integrated plastic forming die loading and unloading device. The invention patent with the publication number of CN104338883B discloses a die assembling and disassembling trolley of a wheel rotary forging press, which is mainly used for solving the problem of low assembling and disassembling efficiency of the wheel rotary forging press when assembling and disassembling a die. The invention discloses a method for assembling and disassembling a low-pressure cast aluminum alloy wheel mold in the invention patent with the publication number of CN104439162A, overcomes the defect of low assembling and disassembling efficiency in the prior art, and provides the method for assembling and disassembling the low-pressure cast aluminum alloy wheel mold, which has the advantages of simple structure, convenience in operation, safety, reliability, high quality and high efficiency. In US patent publication US4571320A a method and apparatus for loading and unloading a sheet material between an upper die and a lower die on a sheet material press forming apparatus using a robot is disclosed. An apparatus and method for loading and unloading material into the mold of an injection molding machine is disclosed in U.S. patent publication No. US 5527174A. In US patent publication US3635327A, an apparatus for handling loads (such as a die on a press) is disclosed, while the load can be moved accurately between a conveyor up and down position by a motion actuator. The invention discloses a replacement trolley for a die of a sleeve pressing machine, which is disclosed in technical information 2013(07) (110) of the replacement trolley for the die of the sleeve pressing machine, effectively improves the production efficiency and brings considerable economic benefit for enterprises; yangjinling and others have designed one wheel forging mold transferring and assembling device in 2016(05) (52-55) and PLC for the whole operation process.
In the invention, the overall structure, function and layout of the equipment such as hot forging equipment, an extruding machine, a numerical control punching machine, a core shooting machine, an injection molding machine, a wheel rotary forging press, aluminum alloy wheel low-pressure casting and the like are greatly different from those of a spinning machine tool, and the process technology is fundamentally different, so that the invention cannot be used in spinning plastic processing, and meanwhile, the technical field of mechanical manufacturing and automation thereof is not difficult to see, and the pursuit of high efficiency, digitalization and intellectualization gradually becomes the mainstream development direction of the manufacturing industry. At present, the installation and the disassembly of a spinning die in the numerical control spinning processing are still carried out by manual operation of workers and hoisting mechanical equipment, and the defects of low production efficiency, high labor intensity, high danger coefficient, easy machine tool abrasion and the like exist. In summary, in order to improve the production efficiency, reduce the labor intensity and the working condition risk coefficient of workers and protect the machine tool, and in order to realize the integration and digitization of the equipment manufacturing process, the tool for spin forming the aluminum alloy thin-wall complex curved bus bar member and the use method thereof are urgently needed to realize the automatic loading and unloading of the die in the spin forming process of the member.
Disclosure of Invention
In order to effectively improve the production efficiency of numerical control spinning forming manufacturing, reduce the labor intensity of workers, reduce the danger coefficient and reduce the loss of machine tool equipment, and simultaneously facilitate the spinning forming manufacturing to advance towards the digital, automatic and intelligent directions, the invention provides a tool for spinning forming of a complex curved bus member and a use method thereof.
The invention provides a spinning forming tool for an aluminum alloy thin-wall complex curved bus member. The lower end of the first hydraulic cylinder is clamped on the upper surface of the slide rail through a slide block; the second hydraulic cylinder is arranged on one side surface of the sliding block; the first hydraulic cylinder and the second hydraulic cylinder are perpendicular to each other. And a die clamping and fixing unit is arranged on the upper end face of the first hydraulic cylinder.
The upper surface of the die clamping and fixing unit is a semicircular arc surface, and a clamping groove extending in the circumferential direction is formed in the semicircular arc surface. The center line of the clamping groove in the width direction is superposed with the center line of the die clamping and fixing unit in the width direction; the radius of the clamping groove is the same as that of a mould flange positioned at the end of the curved bus mould.
The mold locking flange comprises a locking flange and a locking disc hydraulic cylinder. Four pins are uniformly distributed on one surface of the locking flange and are matched with the large circular arc of the strip-shaped through hole on the surface of the main shaft flange; and one side of each pin is provided with a nut counter bore. Two locking disc hydraulic cylinders are symmetrically arranged on the other surface of the locking flange.
4 uniformly distributed strip-shaped through holes are processed on the surface of a main shaft flange at the end head of a main shaft of the machine tool, and the length direction of the strip-shaped through holes is consistent with the circumferential direction of the main shaft flange. The inner surface of the strip-shaped through hole is an arc surface, and the curvature of the arc surface is the same as that of the main shaft flange. The two ends of the strip-shaped through hole are both arc-shaped, the arc at one end is large, the radius of the arc is larger than the radius of nuts on four bolts on the mould flange, and the arc is coaxial with four pins distributed on the mould locking flange and has the same diameter; the arc at the other end of the strip-shaped through hole is small, and the radius of the arc is larger than the radius of the four bolts. And an included angle alpha formed by a connecting line between the center A of the large arc radius at one end of the strip-shaped through hole and the center B of the small arc radius at the other end of the strip-shaped through hole and the center O of the main shaft flange is 15 degrees.
Four bolts are arranged on the end face of the die flange, which is attached to the main shaft of the machine tool, and the centers of the bolts are respectively coaxial with the centers of the small arcs of the strip-shaped through holes on the main shaft flange. During assembly, the bolts on the die flange are respectively installed in the large circular arcs in the strip-shaped through holes on the main shaft flange and rotate 15 degrees anticlockwise, so that the bolts respectively enter the small circular arcs in the strip-shaped through holes on the main shaft flange, the end face of the die flange is attached to the end face of the main shaft flange, and the movement of the die on the central axis is limited.
The invention provides a specific process for using the spinning forming tool for the aluminum alloy thin-wall complex curved bus member, which comprises the following steps:
i, placing the conical die in a hoisting mode: and the mould clamping and positioning mechanism is moved to the front of a machine tool spindle flange of the numerical control spinning machine tool spindle through a second hydraulic cylinder. The mould clamping and fixing unit is vertically lifted through a first hydraulic cylinder in the mould clamping and positioning mechanism, so that the central line of the conical mould placed on the mould clamping and fixing unit is coaxial with the main shaft of the machine tool. And hanging rings are respectively arranged in the threaded holes in the top center and the tail circumference of the conical die. And hoisting the conical mould to the mould clamping and positioning mechanism, and embedding the flange at the tail end of the conical mould into a clamping groove in the mould clamping and fixing unit of the mould clamping and positioning mechanism to finish the hoisting and placing of the conical mould.
The forming die is divided into a conical die and a curved bus die. The conical die is used for performing first-pass spinning forming on the prefabricated part of the aluminum alloy thin-wall complex curved bus member in the forming of the aluminum alloy thin-wall complex curved bus member, and the curved bus die is used for performing second-pass spinning forming on the aluminum alloy thin-wall complex curved bus member in the forming of the aluminum alloy thin-wall complex curved bus member.
II, connecting the conical die with the main shaft: the centers of the large arcs in the strip-shaped holes on the circumference of the main shaft flange are respectively coaxial with the centers of the screws on the die flange of the conical die. And 4 bolts are arranged on the die flange. And the second hydraulic cylinder enables the mold clamping and positioning mechanism to move along the horizontal direction until the mold flange and the spindle flange are completely attached, and nuts of 4 bolts on the mold flange enter into a large circular arc at one end of 4 strip-shaped through holes of the spindle flange.
III, locking the conical die:
and after the die flange and the spindle flange are completely attached, the spindle of the numerical control spinning machine tool rotates anticlockwise by 15 degrees, so that the nuts of the 4 bolts enter the small arcs at the other ends of the strip-shaped through holes to limit the movement of the die in the direction of the central axis.
Enabling the mold locking flange to move towards the machine tool spindle flange through two locking disc hydraulic cylinders on the mold locking flange, enabling each pin on the surface of the mold locking flange to be respectively inserted into the large circular arc of the strip-shaped through hole, and enabling the nuts of the bolts to be respectively embedded into 4 nut counter bores on the surface of the mold locking flange; the bolts are limited to slide out of the small circular arcs of the strip-shaped through holes through the pins, and the bolts and nuts are embedded into nut counter bores of the locking flanges to limit the pins to slide out of the large circular arcs of the strip-shaped through holes, so that complete clamping and fixing of the conical die are achieved.
And starting the first hydraulic cylinder and the second hydraulic cylinder to enable the mold clamping and positioning mechanism to move downwards and horizontally along the slide rail while the mold clamping and fixing unit moves downwards, and then the mold clamping and positioning mechanism returns to the position below the main shaft of the machine tool.
IV, spinning forming of prefabricated part
And (3) fixing the spinning initial circular plate blank of the 3A21 high-strength aluminum alloy thin-wall complex curved bus bar component at the top end of the conical die. And starting the numerical control spinning machine tool, and carrying out primary spinning forming on the blank according to set spinning parameters. And after the first-time spinning is finished, obtaining the conical prefabricated member with the half cone angle of 30 degrees.
V, disassembly of conical die
And taking down the obtained conical prefabricated part, and disassembling the conical die. During disassembly, the mold clamping and fixing unit is moved to the position below the conical mold to be disassembled through the first hydraulic cylinder and the second hydraulic cylinder, and the flange of the conical mold is embedded into the clamping groove in the upper surface of the mold clamping and fixing unit, so that the conical mold is clamped. The mold locking flange moves towards one end far away from the main shaft flange through the two cylinders on the mold locking flange, so that the pin on the mold locking flange is separated from the large arc of the strip-shaped through hole, and the nut of the bolt is separated from the nut counter bore on the mold locking flange. And (3) clockwise rotating the main shaft of the numerical control spinning machine tool by 15 degrees, so that the 4 bolts are transferred into the large arcs in the strip-shaped through holes, and the die flange is separated from the flange of the main shaft of the machine tool. And the second hydraulic cylinder enables the clamping and positioning mechanism to horizontally move along the slide rail and to be far away from the main shaft of the machine tool. And (5) hoisting the conical die away from the machine tool. And finishing the mounting and dismounting of the conical die used in the first-pass prefabricated part spinning forming.
i, hoisting and placing of curved bus mould
And (4) repeating the process of hoisting the conical die in the step (1) to finish hoisting and placing the curved bus die.
II, connecting the curved bus mould with the main shaft:
and (4) repeating the process of connecting the conical die and the main shaft in the step (1) to complete the connection of the curved bus die and the main shaft.
III, locking a curved bus mould:
and (4) repeating the process of locking the conical die in the step (1) to complete the locking of the curved bus die.
IV, spin forming of the aluminum alloy thin-wall complex curved bus member:
and (4) repeating the spinning forming process of the prefabricated part in the step (1) to finish the spinning forming of the aluminum alloy thin-wall complex curved bus member.
Disassembling V-shaped and curved bus-bar-shaped die
And (3) taking down the obtained aluminum alloy thin-wall complex curved bus member, repeating the process of disassembling the conical die in the step (1), and disassembling the curved bus-shaped die.
And finishing the mounting and dismounting of the curved bus mould in the spinning forming of the second-pass aluminum alloy thin-wall complex curved bus component.
The forming die is divided into a conical die and a curved bus die. The conical die is used for performing first-pass spinning forming on the prefabricated part of the aluminum alloy thin-wall complex curved bus member in the forming of the aluminum alloy thin-wall complex curved bus member, and the curved bus die is used for performing second-pass spinning forming on the aluminum alloy thin-wall complex curved bus member in the forming of the aluminum alloy thin-wall complex curved bus member.
According to the tool for spinning forming of the aluminum alloy thin-wall complex curved bus member and the use method thereof, automatic assembly and disassembly of a numerical control spinning processing die can be realized, so that the assembly and disassembly time of the die is shortened, the production cost and the labor intensity and danger coefficient of workers are reduced, and meanwhile, the abrasion of a machine tool can be effectively prevented.
Compared with the prior art, the invention has the beneficial effects that:
the invention relates to a die clamping and positioning mechanism, a die and main shaft connecting piece and a die locking flange, wherein clamping is completed through hoisting clamping of the die, connection of the die and a main shaft, die locking and the like under the control of sequential actions of a numerical control system; when the mould is disassembled, the mould is disassembled through unlocking the mould, separating the mould from the main shaft, lifting the mould and the like under the control of the sequential action of the numerical control system. The invention can realize the automatic assembly and disassembly of the middle-sized or large-sized curved bus mold, the conical mold and the cylindrical mold in the manufacturing process of numerical control spinning forming, ensure the reliable connection and locking of the mold and the main shaft, effectively reduce the assembly and disassembly time of the middle-sized and large-sized molds, eliminate the potential personal accidental injuries such as injury, collision and the like to operators in the process of assembling and disassembling the molds, and reduce the machine tool abrasion caused by repeated assembly and disassembly of the molds. Therefore, compared with most of the current numerical control spinning forming manufacturing industry, the invention can obviously improve the production efficiency, reduce the labor intensity and danger coefficient of workers, effectively slow down the abrasion of the matching surface of the main shaft of the numerical control spinning machine tool and the die, improve the installation precision of the die, and simultaneously is beneficial to further and effectively improving the automation, integration and digitization of the processing procedure of the numerical control spinning forming manufacturing industry.
Drawings
FIG. 1 is a schematic structural view of a spindle flange; where 1a is a front view and 1b is a plan view.
FIG. 2 is a schematic structural diagram of a clamping and fixing unit; where 2a is a front view and 2b is a plan view.
Fig. 3 is a schematic view of a mold clamping and positioning mechanism.
Fig. 4 is a schematic view of the connection of the mold to the spindle.
Fig. 5 is a schematic structural view of a mold locking flange.
FIG. 6 is a schematic view of the tool in use; the method comprises the following steps of machining a tool, connecting a die locking flange with a flange of a machine tool spindle, connecting a tool with the flange of the machine tool spindle, connecting a tool with the die locking flange of the machine tool spindle, connecting a tool with the tool, connecting a curved bus die with the machine tool spindle, connecting 6i with the curved bus die during machining, connecting 6j with the tool, and connecting a conical die with the tool, wherein 6a is an initial position schematic diagram.
Fig. 7 is a flow chart of the present invention.
In the figure: 1. a strip-shaped through hole; 2. a mold clamping and fixing unit; 3. a first hydraulic cylinder; 4. a second hydraulic cylinder; 5. a slide rail; 6. a curved busbar mold; 7. a mold flange; 8. a flange of a main shaft of the machine tool; 9. a machine tool spindle; 10. a screw; 11. a pin; 12. a nut counter bore; 13. a locking disc hydraulic cylinder; 14. a mold locking flange; 15. a conical die; 16. and (5) cylindrical surface die.
Detailed Description
Example 1:
the tool comprises a die clamping and positioning mechanism and a die locking flange, and the die clamping and positioning mechanism is matched with the die locking flange to clamp a forming die.
The mold clamping and positioning mechanism comprises a mold clamping and fixing unit 2, a first hydraulic cylinder 3, a sliding rail 5 and a second hydraulic cylinder 4. The lower end of the first hydraulic cylinder is clamped on the upper surface of the slide rail 5 through a slide block; the second hydraulic cylinder is arranged on one side surface of the sliding block; the first hydraulic cylinder and the second hydraulic cylinder are perpendicular to each other. And a mold clamping and fixing unit 2 is installed on the upper end face of the first hydraulic cylinder 3.
The die clamping and fixing unit 2 is in a block shape, the upper surface of the die clamping and fixing unit is a semi-arc surface, and a clamping groove extending in the circumferential direction is formed in the semi-arc surface. The center line of the clamping groove in the width direction is superposed with the center line of the die clamping and fixing unit in the width direction; the radius of the clamping groove is the same as that of the mould flange 7 positioned at the end of the curved bus mould.
The mold locking flange includes a mold locking flange 14 and a locking disk cylinder 13. Four pins 11 are uniformly distributed on one surface of the mold locking flange and are matched with the major circular arc of the strip-shaped through hole 1 on the surface of the main shaft flange 8; a nut counterbore 12 is provided on each side of each of the studs. Two locking disc hydraulic cylinders 13 are symmetrically arranged on the other surface of the mold locking flange 14.
In order to connect a forming die with a machine tool spindle through the tool for spin forming the aluminum alloy thin-wall complex curved bus bar component, in this embodiment, a die flange 7 located at the end of the forming die and a spindle flange 8 located at the end of a machine tool spindle 9 are respectively improved, specifically:
improvement of the spindle flange 8: 4 uniformly distributed strip-shaped through holes 1 are processed on the surface of the main shaft flange, and the length direction of the strip-shaped through holes is consistent with the circumferential direction of the main shaft flange. The inner surface of the strip-shaped through hole is an arc surface, and the curvature of the arc surface is the same as that of the main shaft flange. The two ends of the strip-shaped through hole are arc-shaped, the arc at one end is large, the radius of the arc is larger than the radius of nuts of four bolts 10 on the die flange 7, and the arc is coaxial with four pins 11 distributed on a die locking flange 14 and has the same diameter; the arc at the other end of the strip-shaped through hole is small, and the radius of the arc is larger than the radius of the four bolts 10. And an included angle alpha formed by a connecting line between the center A of the large arc radius at one end of the strip-shaped through hole and the center B of the small arc radius at the other end of the strip-shaped through hole and the center O of the main shaft flange is 15 degrees.
The improvement of the mould flange 7: four bolts are arranged on the end face of the die flange, which is attached to the main shaft of the machine tool, and the centers of the bolts are respectively coaxial with the centers of the small arcs of the strip-shaped through holes 1 on the main shaft flange 8.
During assembly, the bolts on the die flange are respectively installed in the large circular arc in the strip-shaped through hole on the main shaft flange 8 and rotate anticlockwise for 15 degrees, so that the bolts respectively enter the small circular arc in the strip-shaped through hole on the main shaft flange 8, the end face of the die flange is attached to the end face of the main shaft flange, and the movement of the die on the central axis is limited.
Example 2
The embodiment is a method for clamping a forming die in the spinning forming process of an aluminum alloy thin-wall complex curved bus member.
The forming die is divided into a conical die 15 and a curved bus bar die 6. The conical die 15 is used for forming a prefabricated part of the aluminum alloy thin-wall complex curved bus member through first-pass spinning in the forming of the aluminum alloy thin-wall complex curved bus member, and the curved bus die 6 is used for forming the aluminum alloy thin-wall complex curved bus member through second-pass spinning in the forming of the aluminum alloy thin-wall complex curved bus member.
The material of the initial circular plate blank for spinning the aluminum alloy thin-wall complex curved bus member is 3A21 high-strength aluminum alloy, the diameter of the circular plate is 520mm, and the thickness of the circular plate is 2 mm. And multi-pass forming is adopted, wherein a prefabricated part with a half cone angle of 30 degrees is processed by spin forming of a conical die 15 in the first pass, and a finished part is spin formed by a curved bus die 6 in the second pass.
The specific process of this embodiment is:
i, placing the conical die in a hoisting mode: and the mold clamping and positioning mechanism is moved to the front of a machine tool spindle flange of a numerical control spinning machine tool spindle 9 through a second hydraulic cylinder 4. The mould clamping and fixing unit 2 is vertically lifted through the first hydraulic cylinder 3 in the mould clamping and positioning mechanism, so that the central line of a conical mould 15 arranged on the mould clamping and fixing unit is coaxial with the main shaft 9 of the machine tool. And hanging rings are respectively arranged in the threaded holes in the top center and the tail circumference of the conical die. And hoisting the conical mould to the mould clamping and positioning mechanism, and embedding the flange 7 at the tail end of the conical mould into a clamping groove in the mould clamping and fixing unit 2 of the mould clamping and positioning mechanism to finish the hoisting and placing of the conical mould.
II, connecting the conical die with the main shaft: the centers of the large arcs in the strip-shaped holes 1 on the circumference of the spindle flange 8 are respectively coaxial with the centers of the screws on the die flange 7 of the conical die. 4 bolts 10 are mounted on the mould flange 7. Make through second pneumatic cylinder 4 mould centre gripping positioning mechanism move along the horizontal direction extremely mould flange 7 and spindle flange 8 laminate completely, just the nut of 4 bolts 10 on the mould flange all gets into in the orthodrome of one end in 4 bar through-holes 1 of spindle flange 8.
III, locking the conical die:
after the die flange 7 and the spindle flange 8 are completely attached, the spindle 9 of the numerical control spinning machine tool rotates 15 degrees anticlockwise, so that the nuts of the 4 bolts 10 enter the small circular arcs at the other ends of the strip-shaped through holes 1, and the movement of the die in the direction of the central axis is limited.
Enabling the mold locking flange to move towards the machine tool spindle flange 8 through two locking disc hydraulic cylinders 13 on the mold locking flange 14, enabling pins on the surface of the mold locking flange to be respectively inserted into the large arcs of the strip-shaped through holes, and enabling nuts of the bolts 10 to be respectively embedded into 4 nut counter bores 12 on the surface of the mold locking flange; the bolts are limited to slide out of the small circular arcs of the strip-shaped through holes through the pins, and the bolts and nuts are embedded into nut counter bores of the locking flanges to limit the pins to slide out of the large circular arcs of the strip-shaped through holes, so that complete clamping and fixing of the conical die 15 are achieved.
And starting the first hydraulic cylinder 3 and the second hydraulic cylinder 4, so that the mold clamping and fixing unit 2 of the mold clamping and positioning mechanism moves downwards and horizontally along the slide rail 5 at the same time, and retreats to the lower part of the machine tool spindle.
IV, spinning forming of prefabricated part
The geometric center of the initial circular plate blank spun by the 3A21 high-strength aluminum alloy thin-wall complex curved bus member is provided with a screw hole matched with the conical die; the screw passes through the geometric center hole to fix the blank at the top end of the conical die 15. And starting the numerical control spinning machine tool, and carrying out primary spinning forming on the blank according to set spinning parameters by adopting a conventional spinning method. And after the first-time spinning is finished, obtaining the conical prefabricated member with the half cone angle of 30 degrees.
V, disassembly of conical die
The resulting conical preform is removed and the conical mould 15 is removed. During disassembly, the mold clamping and fixing unit 2 is moved to the position below a conical mold to be disassembled through the first hydraulic cylinder 3 and the second hydraulic cylinder 4, and a flange of the conical mold is embedded into a clamping groove in the upper surface of the mold clamping and fixing unit, so that the conical mold is clamped. The two cylinders 13 on the mold locking flange enable the mold locking flange 14 to move towards one end far away from the main shaft flange 8, so that the pin 11 on the mold locking flange is separated from the large circular arc of the strip-shaped through hole, and the nut of the bolt 10 is separated from the nut counter bore 12 on the mold locking flange. And (3) rotating the spindle 9 of the numerical control spinning machine tool clockwise by 15 degrees, so that the 4 bolts 10 are transferred into a large arc in each strip-shaped through hole 1, and the die flange 7 is separated from the spindle flange 8 of the machine tool. And the clamping and positioning mechanism is horizontally moved away from the main shaft 9 of the machine tool along the slide rail by the second hydraulic cylinder 3. The conical die 15 is lifted off the machine. Thus, the mounting and dismounting of the conical die 15 in the first-pass preform spinning forming are completed.
i, hoisting and placing of curved bus mould
And (4) repeating the process of hoisting the conical die in the step (1) to finish hoisting and placing the curved bus die.
II, connecting the curved bus mould with the main shaft:
and (4) repeating the process of connecting the conical die and the main shaft in the step (1) to complete the connection of the curved bus die and the main shaft.
III, locking a curved bus mould:
and (4) repeating the process of locking the conical die in the step (1) to complete the locking of the curved bus die.
IV, spin forming of the aluminum alloy thin-wall complex curved bus member:
and (4) repeating the spinning forming process of the prefabricated part in the step (1) to finish the spinning forming of the aluminum alloy thin-wall complex curved bus member.
Disassembling V-shaped and curved bus-bar-shaped die
And (3) taking down the obtained aluminum alloy thin-wall complex curved bus member, repeating the process of disassembling the conical die in the step (1), and disassembling the curved bus-shaped die.
And finishing the mounting and dismounting of the curved bus mould 6 in the second-pass aluminum alloy thin-wall complex curved bus member spinning forming.
Tests prove that the invention can realize the automatic assembly and disassembly of the conical die, the curved bus die and the cylindrical die in the numerical control multi-pass spinning forming manufacturing process, can greatly reduce the time spent on the assembly and disassembly of the spinning forming die, can effectively avoid possible potential injuries, such as crushing, collision and the like, brought to operators in the assembly and disassembly processes of the spinning forming die, and simultaneously reduces the machine tool abrasion caused by the repeated assembly and disassembly of the die, thereby obviously improving the spinning forming manufacturing efficiency and greatly reducing the production cost.
Claims (5)
1. A tool for spin forming of a complex curved bus member is characterized by comprising a die clamping and fixing unit, a first hydraulic cylinder, a sliding rail and a second hydraulic cylinder; the lower end of the first hydraulic cylinder is clamped on the upper surface of the slide rail through a slide block; the second hydraulic cylinder is arranged on one side surface of the sliding block; the first hydraulic cylinder and the second hydraulic cylinder are vertical to each other; a mould clamping and fixing unit is arranged on the upper end face of the first hydraulic cylinder; the upper surface of the die clamping and fixing unit is a semicircular arc surface, and a clamping groove extending in the circumferential direction is formed in the semicircular arc surface; the center line of the clamping groove in the width direction is superposed with the center line of the die clamping and fixing unit in the width direction; the radius of the clamping groove is the same as that of a mould flange positioned at the end of the curved bus mould;
4 uniformly distributed strip-shaped through holes are processed on the surface of a main shaft flange at the end head of a main shaft of a machine tool, and the length direction of the strip-shaped through holes is consistent with the circumferential direction of the main shaft flange; the inner surface of the strip-shaped through hole is an arc surface, and the curvature of the arc surface is the same as that of the main shaft flange; the two ends of the strip-shaped through hole are both arc-shaped, the arc at one end is large, the radius of the arc is larger than the radius of nuts on four bolts on the mould flange, and the arc is coaxial with four pins distributed on the mould locking flange and has the same diameter; the arc at the other end of the strip-shaped through hole is small, and the radius of the arc is larger than the radius of the four bolts; and an included angle alpha formed by a connecting line between the center A of the large arc radius at one end of the strip-shaped through hole and the center B of the small arc radius at the other end of the strip-shaped through hole and the center O of the main shaft flange is 15 degrees.
2. The tool for spin forming of a complex curved busbar component according to claim 1, wherein the die locking flange comprises a locking flange and a locking disc hydraulic cylinder; four pins are uniformly distributed on one surface of the locking flange and are matched with the large circular arc of the strip-shaped through hole on the surface of the main shaft flange; one side of each pin is provided with a nut counter bore; two locking disc hydraulic cylinders are symmetrically arranged on the other surface of the locking flange.
3. The tool for spin forming of a complex curved busbar component according to claim 1, wherein four bolts are mounted on the end face of the die flange, which is attached to the spindle of the machine tool, and the centers of the bolts are respectively coaxial with the centers of the small arcs of the strip-shaped through holes on the spindle flange; during assembly, the bolts on the die flange are respectively installed in the large circular arcs in the strip-shaped through holes on the main shaft flange and rotate 15 degrees anticlockwise, so that the bolts respectively enter the small circular arcs in the strip-shaped through holes on the main shaft flange, the end face of the die flange is attached to the end face of the main shaft flange, and the movement of the die on the central axis is limited.
4. The use method of the tool for spin forming of the complex curved busbar component, disclosed by claim 1, is characterized by comprising the following specific processes:
step 1, clamping a conical die in the first-pass prefabricated part spinning forming, which specifically comprises the following steps:
i, placing the conical die in a hoisting mode:
the die clamping and positioning mechanism is moved to the front of a machine tool spindle flange of a spindle of the numerical control spinning machine tool through a second hydraulic cylinder; enabling the mold clamping and fixing unit to vertically ascend through a first hydraulic cylinder in the mold clamping and positioning mechanism, and enabling the central line of a conical mold placed on the mold clamping and fixing unit to be coaxial with a machine tool spindle; hanging rings are respectively arranged in threaded holes in the top center and the tail circumference of the conical die; hoisting the conical mould to the mould clamping and positioning mechanism, and embedding the flange at the tail end of the conical mould into a clamping groove in the mould clamping and fixing unit of the mould clamping and positioning mechanism to finish the hoisting and placing of the conical mould;
II, connecting the conical die with the main shaft:
the centers of the large arcs in the strip-shaped holes on the circumference of the main shaft flange are respectively coaxial with the centers of the screws on the die flange of the conical die; 4 bolts are arranged on the die flange; the mold clamping and positioning mechanism moves along the horizontal direction through a second hydraulic cylinder until the mold flange and the spindle flange are completely attached, and nuts of 4 bolts on the mold flange enter a large arc at one end of 4 strip-shaped through holes of the spindle flange;
III, locking the conical die:
after the die flange and the spindle flange are completely attached, the spindle of the numerical control spinning machine tool rotates 15 degrees anticlockwise, so that the nuts of the 4 bolts enter the small arcs at the other ends of the strip-shaped through holes to limit the movement of the die in the direction of the central axis;
enabling the mold locking flange to move towards the machine tool spindle flange through two locking disc hydraulic cylinders on the mold locking flange, enabling each pin on the surface of the mold locking flange to be respectively inserted into the large circular arc of the strip-shaped through hole, and enabling the nuts of the bolts to be respectively embedded into 4 nut counter bores on the surface of the mold locking flange; the bolts are limited to slide out of the small circular arcs of the strip-shaped through holes through the pins, and the bolts and nuts are embedded into nut counter bores of the locking flanges to limit the pins to slide out of the large circular arcs of the strip-shaped through holes, so that complete clamping and fixing of the conical mold are realized;
starting the first hydraulic cylinder and the second hydraulic cylinder to enable the mold clamping and fixing unit of the mold clamping and positioning mechanism to move downwards and simultaneously move horizontally along the slide rail and return to the position below the main shaft of the machine tool;
IV, spinning and forming of the prefabricated part:
fixing the initial circular plate blank of the spinning 3A21 high-strength aluminum alloy thin-wall complex curved bus member at the top end of the conical die; starting a numerical control spinning machine tool, and carrying out primary spinning forming on the blank according to set spinning parameters; after the first-time spinning is finished, a conical prefabricated part with a half cone angle of 30 degrees is obtained;
v, disassembling the conical die:
taking down the obtained conical prefabricated part, and disassembling the conical die; during disassembly, the mold clamping and fixing unit is moved to the position below a conical mold to be disassembled through the first hydraulic cylinder and the second hydraulic cylinder, and a flange of the conical mold is embedded into a clamping groove in the upper surface of the mold clamping and fixing unit, so that the conical mold is clamped; the mold locking flange is moved to one end far away from the main shaft flange through two cylinders on the mold locking flange, so that a pin on the mold locking flange is separated from the large arc of the strip-shaped through hole, and a nut of the bolt is separated from a nut counter bore on the mold locking flange; rotating the main shaft of the numerical control spinning machine tool clockwise by 15 degrees, so that the 4 bolts are transferred into a large arc in each strip-shaped through hole, and the die flange is separated from the flange of the main shaft of the machine tool; the clamping and positioning mechanism horizontally moves away from the main shaft of the machine tool along the slide rail through the second hydraulic cylinder; lifting the conical die off the machine tool; thus, the assembly and disassembly of the conical die used in the first-pass prefabricated part spinning forming are completed;
step 2, clamping a curved bus mold in the aluminum alloy thin-wall complex curved bus member formed in the second pass, specifically:
i, placing a bent bus mould in a hoisting mode:
repeating the process of hoisting the conical die in the step 1 to finish hoisting and placing the curved bus die;
II, connecting the curved bus mould with the main shaft:
repeating the process of connecting the conical die and the main shaft in the step 1 to complete the connection of the curved bus die and the main shaft;
III, locking a curved bus mould:
repeating the process of locking the conical die in the step 1 to complete the locking of the curved bus die;
IV, spin forming of the aluminum alloy thin-wall complex curved bus member:
repeating the spinning forming process of the prefabricated part in the step 1 to finish the spinning forming of the aluminum alloy thin-wall complex curved bus member;
v, disassembling the curved bus-shaped mold:
taking down the obtained aluminum alloy thin-wall complex curved bus member, repeating the process of disassembling the conical die in the step 1, and disassembling the curved bus-shaped die;
and finishing the mounting and dismounting of the curved bus mould in the spinning forming of the second-pass aluminum alloy thin-wall complex curved bus component.
5. The use method of the tool for spin forming of the complex curved busbar component as claimed in claim 4, wherein the forming die is divided into a conical die and a curved busbar die; the conical die is used for performing first-pass spinning forming on the prefabricated part of the aluminum alloy thin-wall complex curved bus member in the forming of the aluminum alloy thin-wall complex curved bus member, and the curved bus die is used for performing second-pass spinning forming on the aluminum alloy thin-wall complex curved bus member in the forming of the aluminum alloy thin-wall complex curved bus member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911353009.XA CN111085591B (en) | 2019-12-25 | 2019-12-25 | Tool for spin forming of complex curved bus component and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911353009.XA CN111085591B (en) | 2019-12-25 | 2019-12-25 | Tool for spin forming of complex curved bus component and use method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111085591A CN111085591A (en) | 2020-05-01 |
| CN111085591B true CN111085591B (en) | 2021-06-22 |
Family
ID=70397140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911353009.XA Active CN111085591B (en) | 2019-12-25 | 2019-12-25 | Tool for spin forming of complex curved bus component and use method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111085591B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6289706B1 (en) * | 1996-03-15 | 2001-09-18 | J. A. Hermanson | Circular and oval flanged rings for connecting ducting and method of making |
| CN104344117A (en) * | 2013-08-10 | 2015-02-11 | 江苏科茵格特种沥青有限公司 | Connecting flange for asphalt pipelines |
| CN106890880A (en) * | 2015-12-18 | 2017-06-27 | 内蒙古航天红岗机械有限公司 | One koji bus type lid class is without mould inward turning press rotary wheel mechanism |
| CN206800147U (en) * | 2017-03-20 | 2017-12-26 | 永通建设工程有限公司 | A kind of maintaining road pouring can |
| CN108679052A (en) * | 2018-07-23 | 2018-10-19 | 周宝龙 | A kind of special high intensity stable type Ifold flange |
| CN109590369A (en) * | 2019-01-23 | 2019-04-09 | 刘金宝 | A kind of stainless steel spinning machine |
| CN110090884A (en) * | 2019-06-13 | 2019-08-06 | 哈尔滨工业大学 | A kind of large diameter thin wall back cover structure Opposite roller spinning device based on edge constraint |
-
2019
- 2019-12-25 CN CN201911353009.XA patent/CN111085591B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6289706B1 (en) * | 1996-03-15 | 2001-09-18 | J. A. Hermanson | Circular and oval flanged rings for connecting ducting and method of making |
| CN104344117A (en) * | 2013-08-10 | 2015-02-11 | 江苏科茵格特种沥青有限公司 | Connecting flange for asphalt pipelines |
| CN106890880A (en) * | 2015-12-18 | 2017-06-27 | 内蒙古航天红岗机械有限公司 | One koji bus type lid class is without mould inward turning press rotary wheel mechanism |
| CN206800147U (en) * | 2017-03-20 | 2017-12-26 | 永通建设工程有限公司 | A kind of maintaining road pouring can |
| CN108679052A (en) * | 2018-07-23 | 2018-10-19 | 周宝龙 | A kind of special high intensity stable type Ifold flange |
| CN109590369A (en) * | 2019-01-23 | 2019-04-09 | 刘金宝 | A kind of stainless steel spinning machine |
| CN110090884A (en) * | 2019-06-13 | 2019-08-06 | 哈尔滨工业大学 | A kind of large diameter thin wall back cover structure Opposite roller spinning device based on edge constraint |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111085591A (en) | 2020-05-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102989847B (en) | Fixture for machining lifting ring of car coupler of locomotive and manufacturing process thereof | |
| CN206883199U (en) | A kind of valve body lathe process clamping tooling | |
| CN111283385B (en) | Ultra-precise die machining method and ultra-precise die | |
| CN108098389A (en) | A kind of abnormal shape expansion block type face NC Milling fixture and processing method | |
| CN111085591B (en) | Tool for spin forming of complex curved bus component and use method thereof | |
| CN203356939U (en) | Ultra-large type permanent magnet drum magnetic separator cylinder machining tool | |
| CN108000884B (en) | Intelligent robot welding assembly automation line frock mould servo grabbing mechanism | |
| CN107234207B (en) | Six mould cold mound machines retooling auxiliary machinery hand systems | |
| CN211387238U (en) | Automatic alignment and locking structure for large inner gear ring workpiece | |
| CN102205356A (en) | Cold extrusion die for double end pipe joint | |
| CN217317567U (en) | Inner support shaping device for thin-wall cylindrical part machining | |
| CN215697930U (en) | Workpiece casting and machining device with good positioning effect | |
| CN203679142U (en) | Die spotting and locating device for vehicle wheel forming die | |
| CN215360073U (en) | But metal mold base structure of quick replacement mold core | |
| CN211193056U (en) | Wheel milling finish positioning device | |
| CN111331298A (en) | Combined machining process equipment for large-size thin-wall welding part in aircraft engine | |
| CN109332407B (en) | A template dismouting device for aluminum alloy extrusion | |
| CN201815557U (en) | Cold extruding die for dual-head pipe joint | |
| CN111112947A (en) | Engine expansion section II section milling flutes device | |
| CN214417580U (en) | Die carrier for large press | |
| CN206084843U (en) | Split type many jack catchs wheel detects special fixture | |
| CN219521984U (en) | Assembling device for sensor and magnetic ring of automobile steering gear | |
| CN110539094B (en) | Thin-wall cylinder laser cutting device and processing method | |
| CN212387277U (en) | Automatic feeding and discharging equipment for cast tube sand core | |
| CN220782175U (en) | Coating drenches thick liquid frock |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhan Mei Inventor after: Lei Yudong Inventor after: Zhang Hongrui Inventor after: Zheng Zebang Inventor after: Li Rui Inventor after: Wang Weiping Inventor after: Liu Debo Inventor after: Gao Pengfei Inventor after: Lv Wei Inventor after: Cui Xiaolei Inventor before: Zhan Mei Inventor before: Zhang Hongrui Inventor before: Zheng Zebang Inventor before: Li Rui Inventor before: Lv Wei Inventor before: Cui Xiaolei Inventor before: Lei Yudong |
|
| CB03 | Change of inventor or designer information |