Extrusion container positioning device and method of double-acting forward and reverse extruder

Abstract

The invention provides an extrusion container positioning device and method of a double-acting forward and reverse extruder, the extrusion container positioning device is mounted on the side surface of a main shear device of the extruder, and the main shear device is mounted on a front beam of a main body frame of the extruder; the extrusion container positioning device comprises a base, a mechanical arm, a U-shaped range limiting block and a driving oil cylinder, the base is rotationally connected with one end of the mechanical arm, the other end of the mechanical arm is provided with the U-shaped range limiting block, and the mechanical arm is driven by the driving oil cylinder to swing, so that the U-shaped range limiting block is clamped on a die shaft of the extrusion machine. According to the extrusion container positioning device and method of the double-acting forward and reverse extruder, the extrusion container positioning device is installed on the side face of the main shear device, limited space is effectively utilized, and the problem that space is insufficient in a traditional design is solved; through the combination of the base, the mechanical arm, the U-shaped range limiting block and the driving oil cylinder, accurate positioning of the extrusion cylinder is achieved, and the risk that a mold is damaged when pressure residues are sheared is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of metal forming extruders, and in particular relates to an extrusion barrel positioning device and method for a double-acting forward and reverse extruder. Background Art

[0002] In metal press forming, there are mainly two extrusion methods. One is that the flow direction of the metal product is the same as the movement direction of the extrusion shaft, which is called the forward extrusion method. In the forward extrusion method, there is relative movement between the extrusion barrel and the billet, which generates friction, and the corresponding extruder is called a forward extruder. The other is an extrusion method in which the flow direction of the metal product is opposite to the movement direction of the extrusion shaft, which is called the reverse extrusion method. In the reverse extrusion method, there is no relative movement between the extrusion barrel and the billet, and no friction is generated. The corresponding extruder is called a reverse extruder. The double-action forward and reverse extruder can realize forward and reverse extrusion, and the double-action can extrude seamless pipes.

[0003] After the reverse extrusion, the extruder needs to shear the residual pressure in the extrusion barrel. In order to prevent the mold from being damaged while shearing the residual pressure, an extrusion barrel positioning device is generally installed on the front beam of the extruder. The piston rod of the extrusion barrel limit cylinder is used to press against the extrusion barrel to ensure that the extrusion barrel retreats to the correct position, or the limit block is driven by the hydraulic cylinder to the center of the extruder to limit the retreat of the extrusion barrel. However, in the above two methods, the former uses a hydraulic cylinder to limit the position. Due to the compressibility of the hydraulic oil, it is easy to position inaccurately and cut the mold; the latter hydraulic cylinder and limit block are installed on the front beam of the extruder, resulting in insufficient space on the front beam of the extruder, and the main shear device for forward extrusion cannot be installed.

[0004] Therefore, in the double-acting forward and reverse extruder, since the main shear device for forward extrusion needs to be installed at the front beam, the installation space of the extrusion barrel positioning device is limited, which makes the equipment layout complicated and maintenance difficult. In addition, due to the compressibility of the hydraulic cylinder and the limitations of the mechanical structure, the positioning accuracy of the extrusion barrel is insufficient, which makes the main shear easily cut the mold when shearing the excess, and then replace the mold, increase production costs, and reduce work efficiency. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention aims to propose an extrusion barrel positioning device and method for a double-acting forward and reverse extruder, which solves the problems of inaccurate positioning of the extrusion barrel positioning device of the double-acting forward and reverse extruder, easy damage to the mold, and difficulty in installation due to insufficient space.

[0006] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0007] An extrusion barrel positioning device for a double-acting forward and reverse extruder, the extrusion barrel positioning device is installed on the side of a main shearing device of the extruder, and the main shearing device is installed on the front beam of the main frame of the extruder;

[0008] The extrusion cylinder positioning device includes a base, a mechanical arm, a U-shaped limit block and a driving cylinder. The base is rotatably connected to one end of the mechanical arm, and the other end of the mechanical arm is equipped with a U-shaped limit block for positioning the extrusion cylinder. The mechanical arm is swung by the drive of the driving cylinder installed on the base, so that the U-shaped limit block is stuck on the die shaft of the extruder, and the extrusion cylinder is accurately positioned to facilitate shearing of the excess.

[0009] Furthermore, the base is installed on a bracket between the main shearing device and the front beam of the main frame, and the base is respectively installed with a limit plate 1 and a limit plate 2 at both ends close to the mechanical arm side to limit the swing of the mechanical arm.

[0010] Furthermore, a gasket group is provided between the base and the first limiting plate and the second limiting plate respectively.

[0011] Furthermore, the mechanical arm is rotatably connected to the base via a pin shaft, both ends of the pin shaft are limited by a fixed baffle and an axial baffle respectively, and a self-lubricating copper sleeve is provided between the pin shaft and the mechanical arm.

[0012] Furthermore, the robotic arm is connected to the U-shaped limit block via a transition plate.

[0013] Furthermore, the thickness of the U-shaped limit block is the same as the thickness of the mold.

[0014] Furthermore, the cylinder body of the driving cylinder is hinged to the base, and the telescopic rod of the driving cylinder is hinged to the mechanical arm.

[0015] A method for positioning an extrusion barrel of a double-acting forward and reverse extruder comprises the following steps:

[0016] S1. After the back extrusion of the extruder is completed, the extrusion barrel moves a certain distance away from the die base, and then the driving cylinder is turned on. The driving cylinder contracts and drives the mechanical arm to swing to the center of the extruder, so that the U-shaped limit block is stuck on the die shaft, and the driving cylinder is closed;

[0017] S2, the extrusion barrel moves toward the die base and is in close contact with the U-shaped limit block, and at the same time, the die shaft causes the die and the pressure residue in the extrusion barrel to move in the opposite direction of the extrusion barrel; when the U-shaped limit block is in close contact with the die base, the extrusion barrel stops moving, and the pressure residue is exposed at this time, and is sheared off by the reverse extrusion main shear;

[0018] S3. The extrusion cylinder moves a certain distance away from the die base, and then the driving cylinder is turned on. The driving cylinder extends to drive the robot arm to swing back to the initial position, and the driving cylinder is closed; the extrusion cylinder moves toward the die base and sticks to the die base to expose the mold, and the mold is removed by the handling robot to prepare for the next extrusion.

[0019] Furthermore, in step S1, when the robotic arm touches the limiting plate 1, the driving cylinder is closed.

[0020] Furthermore, in step S3, when the robotic arm touches the second limit plate, the driving cylinder is closed.

[0021] Compared with the prior art, the extrusion barrel positioning device and method of the double-acting forward and reverse extruder of the present invention has the following advantages:

[0022] (1) The extrusion barrel positioning device of the double-acting forward and reverse extruder described in the present invention installs the extrusion barrel positioning device on one side of the main shearing device, which effectively utilizes the limited space and solves the problem of insufficient space in the traditional design; through the combination of the base, the mechanical arm, the U-shaped limit block and the driving cylinder, the extrusion barrel is accurately positioned, reducing the risk of the mold being damaged during shearing and pressing; and it is driven by only one driving cylinder, which is simple to operate, safe and reliable; the U-shaped limit block can be replaced according to the size of the mold shaft, and can adapt to molds and mold shafts of different specifications, thereby enhancing the versatility and flexibility of the equipment.

[0023] (2) The extrusion barrel positioning device of the double-acting forward and reverse extruder described in the present invention limits the swing of the robot arm by setting a limit plate 1 and a limit plate 2, and can adjust the swing-in and swing-out positions of the robot arm by setting a gasket group of different thicknesses, so that the U-shaped limit block is stuck on the mold shaft, thereby realizing the precise positioning of the extrusion barrel.

[0024] (3) The extrusion barrel positioning method of the double-acting forward and reverse extruder described in the present invention reduces the time of manual adjustment and positioning through an automated extrusion barrel positioning method, speeds up the production rhythm, and improves the overall production efficiency; uses a driving cylinder to accurately control the swing of the mechanical arm to ensure that the U-shaped limit block can be accurately stuck on the mold shaft, thereby achieving precise positioning of the extrusion barrel and reducing the risk of damage to the mold during the shearing and pressing process. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 A schematic diagram of the overall structure provided by an embodiment of the present invention;

[0027] Figure 2 A schematic diagram of the structure of an extrusion cylinder positioning device provided in an embodiment of the present invention;

[0028] Figure 3 A schematic diagram of the contraction of the driving cylinder provided in an embodiment of the present invention;

[0029] Figure 4 A schematic diagram of the extension of the driving cylinder provided in an embodiment of the present invention;

[0030] Figure 5 A side view of an extrusion cylinder positioning device provided by an embodiment of the present invention;

[0031] Figure 6 for Figure 5 Middle AA section;

[0032] Figure 7 It is the axial section view of the pin shaft;

[0033] Figure 8 A schematic diagram of a U-shaped limit block structure provided in an embodiment of the present invention;

[0034] Fig. 9 A schematic diagram of a mechanical arm provided by an embodiment of the present invention swinging into the center of an extruder;

[0035] Fig.10 A schematic diagram of shear pressure residue provided by an embodiment of the present invention;

[0036] Fig.11 A schematic diagram of a mold removal provided in an embodiment of the present invention;

[0037] Fig.12 A schematic diagram of the structure of a handling robot provided in an embodiment of the present invention.

[0038] Description of reference numerals:

[0039] 1. Extrusion cylinder positioning device; 2. Main shear device; 3. Main frame; 4. Base; 41. Limit plate one; 411. Screw one; 42. Limit plate two; 43. Gasket set; 5. Robot arm; 51. Pin shaft; 52. Self-lubricating copper sleeve; 53. Fixed baffle; 54. Axial baffle; 55. Transition plate; 551. Screw two; 552. Positioning pin; 553. Screw three; 6. U-shaped limit block; 7. Driving cylinder; 8. Die shaft; 9. Extrusion cylinder; 10. Die; 11. Die base; 12. Pressure residue; 13. Reverse extrusion main shear; 14. Handling robot. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0043] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0044] like Figures 1 to 12 As shown, an extrusion barrel positioning device of a double-acting forward and reverse extruder, the extrusion barrel positioning device 1 is installed on one side of a main shearing device 2 of the extruder, and the main shearing device 2 is installed on the front beam of a main frame 3 of the extruder;

[0045] The extrusion cylinder positioning device 1 includes a base 4, a mechanical arm 5, a U-shaped limit block 6 and a driving cylinder 7. The base 4 is rotatably connected to one end of the mechanical arm 5, and the other end of the mechanical arm 5 is installed with a U-shaped limit block 6 for positioning the extrusion cylinder 9. The mechanical arm 5 is driven by the driving cylinder 7 installed on the base 4 to swing, so that the U-shaped limit block 6 is stuck on the die shaft 8 of the extruder, and the extrusion cylinder 9 is accurately positioned to facilitate shearing of the excess.

[0046] In a preferred embodiment of the present invention, a limiting plate 1 41 and a limiting plate 2 42 for limiting the swing of the robotic arm 5 are respectively installed at two ends of the base 4 close to the robotic arm 5 .

[0047] The base 4 is installed on a bracket between the main shearing device 2 and the front beam of the main frame 3, and a gasket group 43 is respectively provided between the base 4 and the limiting plate 1 41 and the limiting plate 2 42.

[0048] In actual use, the limit plate 1 41, the limit plate 2 42 and the gasket group 43 are respectively installed on the base 4 by means of screws 1 411; when the robot arm 5 swings toward the center of the extruder and touches the limit plate 1 41, the driving cylinder 7 is closed and the swinging is stopped; when the robot arm 5 swings out of the center of the extruder and touches the limit plate 2 42, the driving cylinder 7 is closed and the swinging is stopped; the swinging-in and swinging-out positions of the robot arm 5 can be adjusted by setting gasket groups 43 of different thicknesses, so that the U-shaped limit block 6 is stuck on the mold shaft 8, thereby realizing the precise positioning of the extrusion cylinder 9.

[0049] In a preferred embodiment of the present invention, the robotic arm 5 is rotatably connected to the base 4 via a pin shaft 51 , both ends of the pin shaft 51 are limited by a fixed baffle 53 and an axial baffle 54 , respectively, and a self-lubricating copper sleeve 52 is provided between the pin shaft 51 and the robotic arm 5 .

[0050] In actual use, both ends of the pin shaft 51 pass through the mechanical arm 5, the base 4, and the fixed baffle 53 respectively, and the self-lubricating copper sleeve 52 is arranged between the pin shaft 51 and the mechanical arm 5; a groove is provided at one end of the pin shaft 51, and the groove is used to install the axial baffle 54 to prevent the pin shaft 51 from axial movement; the pin shaft 51 is fixed to the base 4 by the fixed baffle 53 to prevent the pin shaft 51 from circumferential rotation.

[0051] In a preferred embodiment of the present invention, the robotic arm 5 is connected to the U-shaped limit block 6 through a transition plate 55, and the transition plate 55 is connected to the U-shaped limit block 6 through screw two 551; positioning holes are provided on the transition plate 55 and the robotic arm 5, and a positioning pin 552 is provided in the positioning hole, and the transition plate 55 and the robotic arm 5 are connected by screw three 553 passing through the positioning pin 552.

[0052] In actual use, the transition plate 55 and the robotic arm 5 are accurately positioned by the positioning pin 552 to prevent relative displacement during the installation process, and then connected by screw three 553, so that the U-shaped limit block 6 and the robotic arm 5 are stably connected, and convenient for disassembly and assembly when replacement or maintenance is required; it is convenient to replace the U-shaped limit block 6 according to the size of the mold shaft 8.

[0053] In a preferred embodiment of the present invention, the thickness of the U-shaped limit block 6 is the same as the thickness of the mold 10 .

[0054] In actual use, the thickness of the U-shaped limit block 6 is set to be the same as the thickness of the mold 10, and the length of the extrusion part of the mold shaft 8 is the same as the length of the extrusion cylinder 9. When the extrusion cylinder 9, the U-shaped limit block 6, and the mold base 11 are tightly attached in sequence, the mold shaft 8 will expose the pressure residue 12 in the extrusion cylinder 9. When shearing the pressure residue, the safety of the mold 10 can be guaranteed and will not be damaged by the reverse extrusion main shear 13.

[0055] In a preferred embodiment of the present invention, the cylinder body of the driving cylinder 7 is hinged to the base 4 , and the telescopic rod of the driving cylinder 7 is hinged to the mechanical arm 5 .

[0056] In actual use, the telescopic rod of the driving cylinder 7 contracts to drive the mechanical arm 5 to swing to the center of the extruder, and the telescopic rod of the driving cylinder 7 extends to drive the mechanical arm 5 to swing back to the initial position.

[0057] A method for positioning an extrusion barrel of a double-acting forward and reverse extruder comprises the following steps:

[0058] S1, after the back extrusion of the extruder is completed, the extrusion cylinder 9 moves a certain distance away from the die base 11, and then the driving cylinder 7 is turned on. The driving cylinder 7 contracts and drives the mechanical arm 5 to swing to the center of the extruder, so that the U-shaped limit block 6 is stuck on the die shaft 8, and the driving cylinder 7 is closed;

[0059] S2, the extrusion cylinder 9 moves toward the die base 11 and is in close contact with the U-shaped limit block 6, and at the same time, the die shaft 8 causes the die 10 and the pressure residue 12 in the extrusion cylinder 9 to move in the opposite direction of the extrusion cylinder 9; when the U-shaped limit block 6 is in close contact with the die base 11, the extrusion cylinder 9 stops moving, and the pressure residue 12 is exposed at this time, and is cut off by the reverse extrusion main shear 13;

[0060] S3, the extrusion cylinder 9 moves a certain distance away from the die base 11, and then the driving cylinder 7 is turned on. The driving cylinder 7 extends to drive the robot arm 5 to swing back to the initial position, and the driving cylinder 7 is closed; the extrusion cylinder 9 moves toward the die base 11 and fits closely to the die base 11, exposing the die 10, and the die 10 is removed by the transport robot 14 to prepare for the next extrusion.

[0061] In a preferred embodiment of the present invention, in step S1, when the robot arm 5 touches the limit plate 41, the driving cylinder 7 is closed.

[0062] In step S3, when the robot arm 5 touches the second limit plate 42, the driving cylinder 7 is closed.

[0063] In actual use, limit switches are respectively installed on the limit plate 1 41 and the limit plate 2 42 , and the limit switches are used to detect whether the robot arm 5 is in contact with the limit plate 1 41 and the limit plate 2 42 .

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An extrusion barrel positioning device for a double-acting forward and reverse extruder, characterized in that: The extrusion cylinder positioning device (1) is installed on the side of the main shearing device (2) of the extruder, and the main shearing device (2) is installed on the front beam of the main frame (3) of the extruder; The extrusion cylinder positioning device (1) comprises a base (4), a mechanical arm (5), a U-shaped limit block (6) and a driving cylinder (7); the base (4) is rotatably connected to one end of the mechanical arm (5); the other end of the mechanical arm (5) is installed with a U-shaped limit block (6) for positioning the extrusion cylinder (9); the mechanical arm (5) is driven by the driving cylinder (7) installed on the base (4) to swing, so that the U-shaped limit block (6) is stuck on the die shaft (8) of the extruder, and the extrusion cylinder (9) is accurately positioned to facilitate shearing of the residual pressure (12).

2. The extrusion barrel positioning device of the double-acting forward and reverse extruder according to claim 1 is characterized in that: The base (4) is mounted on a bracket between the main shearing device (2) and the front beam of the main frame (3), and the base (4) is respectively provided with a limit plate 1 (41) and a limit plate 2 (42) at both ends of the base (4) close to the mechanical arm (5) for limiting the swing of the mechanical arm (5).

3. The extrusion barrel positioning device of the double-acting forward and reverse extruder according to claim 2 is characterized in that: A gasket group (43) is provided between the base (4) and the first limiting plate (41) and the second limiting plate (42).

4. The extrusion barrel positioning device of a double-acting forward and reverse extruder according to claim 1, characterized in that: The mechanical arm (5) is rotatably connected to the base (4) via a pin shaft (51); both ends of the pin shaft (51) are respectively limited by a fixed baffle (53) and an axial baffle (54); and a self-lubricating copper sleeve (52) is provided between the pin shaft (51) and the mechanical arm (5).

5. The extrusion barrel positioning device of a double-acting forward and reverse extruder according to claim 1, characterized in that: The mechanical arm (5) is connected to the U-shaped limit block (6) via a transition plate (55).

6. The extrusion barrel positioning device of a double-acting forward and reverse extruder according to claim 1, characterized in that: The thickness of the U-shaped limit block (6) is the same as the thickness of the mold (10).

7. The extrusion barrel positioning device of a double-acting forward and reverse extruder according to claim 1, characterized in that: The cylinder body of the driving oil cylinder (7) is hinged to the base (4), and the telescopic rod of the driving oil cylinder (7) is hinged to the mechanical arm (5).

8. A method for positioning an extrusion barrel of a double-acting forward and reverse extruder, characterized in that: The following steps are involved: S1. After the back extrusion of the extruder is completed, the extrusion cylinder (9) moves a certain distance away from the die base (11), and then the driving cylinder (7) is turned on. The driving cylinder (7) contracts and drives the mechanical arm (5) to swing to the center of the extruder, so that the U-shaped limit block (6) is stuck on the die shaft (8), and the driving cylinder (7) is closed; S2, the extrusion barrel (9) moves toward the die base (11) and comes into close contact with the U-shaped limit block (6), and at the same time, the die shaft (8) causes the die (10) and the pressure residue (12) in the extrusion barrel (9) to move in the opposite direction of the extrusion barrel (9); when the U-shaped limit block (6) comes into close contact with the die base (11), the extrusion barrel (9) stops moving, and the pressure residue (12) is exposed, and is cut off by the reverse extrusion main shear (13); S3, the extrusion cylinder (9) moves a certain distance away from the die base (11), and then the driving cylinder (7) is turned on. The driving cylinder (7) extends to drive the mechanical arm (5) to swing back to the initial position, and the driving cylinder (7) is turned off; the extrusion cylinder (9) moves toward the die base (11) and closely adheres to the die base (11), exposing the die (10), and the die (10) is removed by the transporting mechanical arm (14) to prepare for the next extrusion.

9. The method for positioning the extrusion barrel of a double-acting forward and reverse extruder according to claim 8, characterized in that: In step S1, when the robot arm (5) touches the limit plate 1 (41), the driving cylinder (7) is closed.

10. The method for positioning the extrusion barrel of a double-acting forward and reverse extruder according to claim 8, characterized in that: In step S3, when the robot arm (5) touches the second limit plate (42), the driving cylinder (7) is closed.

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