A supporting device for the mandrel of a horizontal extrusion machine

Abstract

A supporting device for the mandrel of a horizontal extrusion machine, comprising a mounting base, a driving mechanism, and a supporting mechanism. The mounting base is arranged on the base track of the horizontal extrusion machine and is driven by the driving mechanism to move axially along the mandrel of the horizontal extrusion machine. The supporting mechanism includes a lifting device, a mounting platform, a first roller, and a second roller. The mounting platform is slidably engaged with the mounting base and is driven by the lifting device to act in the height direction, and its position can be locked. The first roller and the second roller are arranged on the mounting platform, located below the mandrel of the horizontal extrusion machine and symmetrically distributed. The extension lines of the axes of the first roller and the second roller intersect to form a V shape. The structure of the present invention is simple and convenient to use, and can effectively prevent the mandrel of the horizontal extrusion machine from bending and deforming downward, ensuring the rigidity and service life of the mandrel of the horizontal extrusion machine.

Description

Technical Field

[0001] The present invention relates to the field of mechanical engineering, and particularly to a supporting device for the mandrel of a horizontal extruder. Background Art

[0002] A horizontal extruder is formed by laying a vertical die press horizontally, adding a blanking chamber and a pressure chamber, and installing a die nozzle in front of the pressure chamber. The paste is pressed into shape through the die nozzle.

[0003] The mandrel supporting the horizontal extruder, especially for a large-stroke horizontal extruder, has a long length. Under the action of gravity, it bends downward and deforms, resulting in a decrease in the stiffness of the mandrel during the process of extruding the paste. After long-term operation, the degree of bending deformation of the mandrel increases, which not only affects the quality of the extruded workpieces, but seriously, directly leads to the scrapping of the supporting mandrel. Summary of the Invention

[0004] The purpose of the present invention is to provide a supporting device for the mandrel of a horizontal extruder in view of the deficiencies of the prior art. The device has a simple structure and is easy to use, can effectively prevent the mandrel of the horizontal extruder from bending downward and deforming, and ensure the stiffness and service life of the mandrel of the horizontal extruder.

[0005] The technical solution of the present invention is: a supporting device for the mandrel of a horizontal extruder, including an installation base, a driving mechanism, and a supporting mechanism. The installation base is arranged on the base track of the horizontal extruder, driven by the driving mechanism, and moves along the axial direction of the mandrel of the horizontal extruder. The supporting mechanism includes a lifting device, an installation platform, a first roller, and a second roller. The installation platform is slidably matched with the installation base, driven by the lifting device to move in the height direction, and its position can be locked. The first roller and the second roller are arranged on the installation platform, located below the mandrel of the horizontal extruder and symmetrically distributed. The extension lines of the axes of the first roller and the second roller intersect to form a V shape.

[0006] The installation base is slidably or rollably matched with the base track of the horizontal extruder.

[0007] The driving mechanism is a hydraulic cylinder. The cylinder body of the hydraulic cylinder is fixed on the horizontal extruder, and the piston rod of the hydraulic cylinder extends horizontally and is hinged to the installation base.

[0008] A plurality of vertically upward extending guide screws are provided on the installation base. A plurality of guide cylinders are fixedly provided on the bottom surface of the installation platform. The guide cylinders correspond to the guide screws one by one. The installation platform is sleeved on the guide screws of the installation base through the guide cylinders to form a sliding fit.

[0009] Locking nuts are respectively threadedly matched on each of the guide screws. The locking nuts are located below the guide cylinders to lock the height of the installation platform.

[0010] The lifting device includes a screw-nut pair arranged on the bottom surface of the installation platform and a bevel gear pair arranged on the installation base. The screw of the screw-nut pair extends vertically downward and is circumferentially connected to the output bevel gear of the bevel gear pair. The input bevel gear of the bevel gear pair is circumferentially connected to a power shaft to drive the installation platform to lift and lower.

[0011] The output bevel gear and the input bevel gear of the bevel gear pair are respectively rotatably installed on the installation base through bearings.

[0012] The outer extending end of the power shaft is circumferentially and fixedly connected to a handwheel.

[0013] The output bevel gear of the bevel gear pair is a large-diameter gear, and the input bevel gear is a small-diameter gear.

[0014] The number of the first rollers and the second rollers is one or more. A plurality of first rollers are arranged in parallel along the axial direction of the mandrel of the horizontal extrusion machine with an interval distance, and a plurality of second rollers are arranged in parallel along the axial direction of the mandrel of the horizontal extrusion machine with an interval distance.

[0015] Adopting the above technical solution has the following beneficial effects:

[0016] 1. The supporting device for the mandrel of the horizontal extrusion machine includes an installation base, a driving mechanism, and a supporting mechanism. The installation base is arranged on the base track of the horizontal extrusion machine and is driven by the driving mechanism to move along the axial direction of the mandrel of the horizontal extrusion machine. That is, the installation base can be driven by the driving mechanism to move synchronously with the mandrel of the horizontal extrusion machine on the base track of the horizontal extrusion machine. The supporting mechanism includes a lifting device, an installation platform, a first roller, and a second roller. The installation platform is slidably matched with the installation base and is driven by the lifting device to act in the height direction, and the position can be locked. That is, the height of the installation platform can be adjusted and locked. The first roller and the second roller are arranged on the installation platform, located below the mandrel of the horizontal extrusion machine and symmetrically distributed. The extension lines of the axes of the first roller and the second roller intersect to form a V shape. By adjusting the height of the installation platform, the first roller and the second roller are respectively driven to abut against both sides of the lower half of the circumferential surface of the mandrel of the horizontal extrusion machine, and the height of the installation platform is locked to effectively support the corresponding rod section of the mandrel of the horizontal extrusion machine. The distribution mode of the first roller and the second roller with the extension lines of the axes intersecting to form a V shape can also effectively support mandrels of horizontal extrusion machines with different diameters, with a wider adaptability. When the mandrel of the horizontal extrusion machine is operating, the driving mechanism drives the installation base to move synchronously with the mandrel of the horizontal extrusion machine, maintaining the supporting strength for the corresponding rod section of the mandrel of the horizontal extrusion machine, effectively preventing the mandrel of the horizontal extrusion machine from bending and deforming downward due to the action of gravity, and maintaining the rigidity of the mandrel of the horizontal extrusion machine. In addition, since the first roller and the second roller can rotate around their axes themselves, it can also effectively prevent the mandrel of the horizontal extrusion machine from being scratched and ensure the service life of the mandrel of the horizontal extrusion machine.

[0017] 2. The installation base is provided with a plurality of guide screws extending vertically upward. A plurality of guide cylinders are fixedly provided on the bottom surface of the installation platform. The guide cylinders correspond to the guide screws one by one. The installation platform is sleeved on the guide screws of the installation base through the guide cylinders to form a sliding fit. In this way, the installation and disassembly of the installation platform are relatively convenient, and the maintenance cost is relatively low. A locking nut is threadedly engaged with each of the guide screws respectively. The locking nut is located below the guide cylinder to lock the height of the installation platform. By locking the height of the installation platform with the locking nut, the operation is convenient and simple, and the locking strength of the installation platform is large, effectively ensuring the support stability of the first roller and the second roller for the mandrel of the horizontal extrusion machine.

[0018] 3. The lifting device includes a screw-nut pair provided on the bottom surface of the installation platform and a bevel gear pair provided on the installation base. The screw of the screw-nut pair extends vertically downward and is circumferentially connected to the output bevel gear of the bevel gear pair. The input bevel gear of the bevel gear pair is circumferentially connected to a power shaft to drive the installation platform to lift. The power shaft drives the input bevel gear to rotate. The input bevel gear drives the output bevel gear and the screw of the screw-nut pair to rotate. The screw of the screw-nut pair is threadedly engaged with the nut of the screw-nut pair to drive the nut of the screw-nut pair to rise or fall along the axial direction of the screw. The whole set of lifting device has a simple and compact structure, and the use and maintenance costs are low.

[0019] 4. The output bevel gear of the bevel gear pair is a large-diameter gear, and the input bevel gear is a small-diameter gear, which are combined to form a labor-saving bevel gear pair, reducing the manual labor intensity and effectively improving the lifting precision of the installation platform.

[0020] 5. The number of the first rollers and the second rollers is one or more. A plurality of first rollers are arranged in parallel along the axial direction of the mandrel of the horizontal extrusion machine and have an interval distance. A plurality of second rollers are arranged in parallel along the axial direction of the mandrel of the horizontal extrusion machine and have an interval distance. If the length of the mandrel of the horizontal extrusion machine is short, one first roller and one second roller can meet the requirements of support strength and prevent the mandrel of the horizontal extrusion machine from bending downward. If the length of the mandrel of the horizontal extrusion machine is long, the number of the first rollers and the second rollers is designed to be multiple, and the support range for the mandrel of the horizontal extrusion machine is long, which can effectively meet the requirements of support strength and prevent the mandrel of the horizontal extrusion machine from bending downward.

[0021] The following is a further description in conjunction with the drawings and specific embodiments. Brief Description of the Drawings

[0022] Figure 1 is a schematic structural diagram of the present invention;

[0023] Figure 2 is Figure 1 the H-H cross-sectional view of

[0024] Figure 3 This is the assembly schematic diagram of the present invention and the horizontal extruder.

[0025] In the attached drawings, 1 is the installation base, 2 is the driving mechanism, 3 is the supporting mechanism, 4 is the lifting device, 5 is the installation platform, 6 is the first roller, 7 is the second roller, 8 is the guiding screw, 9 is the guiding cylinder, 10 is the locking nut, 11 is the screw-nut pair, 12 is the bevel gear pair, 13 is the power shaft, 14 is the hand wheel, 15 is the mandrel of the horizontal extruder, and 16 is the base track. Detailed implementation manners

[0026] In the present invention, components without specific structures or connection manners marked are usually conventional components or connection manners.

[0027] See Figures 1 to 3, which is a specific embodiment of a support device for the mandrel of a horizontal extrusion machine. The support device for the mandrel of a horizontal extrusion machine includes a mounting base 1, a driving mechanism 2, and a support mechanism 3. The mounting base 1 is arranged on the base track 16 of the horizontal extrusion machine and is driven by the driving mechanism 2 to move along the axial direction of the mandrel of the horizontal extrusion machine. The mounting base 1 can be slidably or rollably engaged with the base track of the horizontal extrusion machine. In this embodiment, the mounting base is slidably engaged with the base track of the horizontal extrusion machine. The driving mechanism 2 is a hydraulic cylinder. The cylinder body of the hydraulic cylinder is fixed on the horizontal extrusion machine, and the piston rod of the hydraulic cylinder extends horizontally and is hinged to the mounting base 1. Specifically, a hinge seat is fixedly provided on the side wall of the mounting base opposite to the driving mechanism through bolts, and the extended end of the piston rod of the hydraulic cylinder is hinged to the hinge seat. The support mechanism 3 includes a lifting device 4, a mounting platform 5, a first roller 6, and a second roller 7. The mounting platform 5 is slidably engaged with the mounting base 1 and is driven by the lifting device 4 to act in the height direction and its position can be locked. In this embodiment, a plurality of vertically extending guide screws 8 are provided on the mounting base 1. Specifically, the number of guide screws is four, which are distributed in a 2*2 matrix. The lower end of the guide screw is integrally formed with a mounting flange, and the guide screw is fixed on the top surface of the mounting base by passing a plurality of bolts through the mounting flange and being threadedly engaged with the mounting base. A plurality of guide cylinders 9 are fixedly provided on the bottom surface of the mounting platform 5. The guide cylinders 9 correspond to the guide screws 8 one by one, that is, the number of guide cylinders is also four and is distributed in a 2*2 matrix. The upper end of the guide cylinder is integrally formed with a mounting flange, and the guide cylinder is fixed on the bottom surface of the mounting platform by passing bolts through the mounting flange and being threadedly engaged with the mounting platform. The mounting platform 5 is sleeved on the guide screws 8 of the mounting base 1 through the guide cylinders 9 to form a sliding fit. In order to ensure the locking strength, locking nuts 10 are respectively threadedly engaged on each of the guide screws 8. The locking nuts 10 are located below the guide cylinders 9 to lock the height of the mounting platform 5. According to actual needs, one or two locking nuts can be respectively threadedly engaged on each of the guide screws.The lifting device 4 includes a screw-nut pair 11 disposed on the bottom surface of the mounting platform 5 and a bevel gear pair 12 disposed on the mounting base 1. The screw-nut pair is located in the middle of the four guide cylinders, and the bevel gear pair is located in the middle of the four guide screws. Specifically, an installation flange is integrally formed at the upper end of the nut of the screw-nut pair. The nut of the screw-nut pair is fixed to the middle of the bottom surface of the mounting platform by passing multiple bolts through the installation flange. The upper end of the screw of the screw-nut pair 11 is in threaded cooperation with the nut of the screw-nut pair, and the lower end extends vertically downward and is circumferentially connected to the output bevel gear of the bevel gear pair 12. The input bevel gear of the bevel gear pair 12 is circumferentially connected to a power shaft 13 to drive the mounting platform 5 to lift. Specifically, the output bevel gear and the input bevel gear of the bevel gear pair 12 are respectively rotatably mounted on the mounting base 1 through bearings. The outer extending end of the power shaft 13 is circumferentially fixedly connected to a handwheel 14. To save effort and improve the lifting accuracy of the mounting platform, the input bevel gear of the bevel gear pair is a small-diameter gear, and the output bevel gear of the bevel gear pair is a large-diameter gear. To prevent foreign objects from interfering with the bevel gear pair, a shielding box is fixedly provided on the mounting base, and the bevel gear pair is assembled in the shielding box. The first roller 6 and the second roller 7 are disposed on the mounting platform 5, located below the mandrel 15 of the horizontal extrusion machine and symmetrically distributed. The extension lines of the axes of the first roller 6 and the second roller 7 intersect to form a V shape. If the length of the mandrel of the horizontal extrusion machine is short, one first roller 6 and one second roller 7 are sufficient. If the length of the mandrel of the horizontal extrusion machine is long, multiple first rollers 6 are arranged in parallel along the axial direction of the mandrel of the horizontal extrusion machine and have a spacing distance, and multiple second rollers 7 are arranged in parallel along the axial direction of the mandrel of the horizontal extrusion machine and have a spacing distance.

[0028] The working principle of the present invention is that an operator rotates the handwheel manually to adjust the height of the mounting platform, driving the first roller and the second roller to respectively abut against both sides of the lower half of the circumferential surface of the mandrel of the horizontal extrusion machine, and rotating the height of the locking nut to abut against the lower end of the corresponding guide cylinder to lock the height of the mounting platform and effectively support the corresponding rod section of the mandrel of the horizontal extrusion machine. When the mandrel of the horizontal extrusion machine is operating, the driving mechanism drives the mounting base to move synchronously with the mandrel of the horizontal extrusion machine, maintaining the support strength for the corresponding rod section of the mandrel of the horizontal extrusion machine, effectively preventing the mandrel of the horizontal extrusion machine from bending and deforming downward due to the action of gravity, and maintaining the rigidity of the mandrel of the horizontal extrusion machine.

Claims

1. A method for supporting the mandrel of a horizontal extrusion machine, characterized in that: Support is provided by a support device. The support device includes a mounting base (1), a drive mechanism (2), and a support mechanism (3). The mounting base (1) is arranged on the base track of the horizontal extruder and is driven by the drive mechanism (2) to move along the axial direction of the mandrel of the horizontal extruder. The support mechanism (3) includes a lifting device (4), a mounting platform (5), a first roller (6), and a second roller (7). The mounting platform (5) is slidably engaged with the mounting base (1) and is driven by the lifting device (4) to act in the height direction and its position can be locked. The first roller (6) and the second roller (7) are arranged on the mounting platform (5), located below the mandrel of the horizontal extruder and are symmetrically distributed. The extension lines of the axes of the first roller (6) and the second roller (7) intersect to form a V shape. The number of the first roller (6) and the second roller (7) is one. The lifting device (4) includes a screw-nut pair (11) provided on the bottom surface of the mounting platform (5) and a bevel gear pair (12) provided on the mounting base (1). The screw of the screw-nut pair (11) extends vertically downward and is circumferentially connected to the output bevel gear of the bevel gear pair (12). The input bevel gear of the bevel gear pair (12) is circumferentially connected to a power shaft (13) to drive the mounting platform (5) to lift. The outer extending end of the power shaft (13) is circumferentially fixedly connected to a handwheel (14). The output bevel gear of the bevel gear pair (12) is a large-diameter gear and the input bevel gear is a small-diameter gear. A plurality of guide screws (8) extending vertically upward are provided on the mounting base (1). A plurality of guide cylinders (9) are fixedly provided on the bottom surface of the mounting platform (5). The guide cylinders (9) correspond to the guide screws (8) one by one. The mounting platform (5) is sleeved on the guide screws (8) of the mounting base (1) through the guide cylinders (9) to form a sliding fit. Locking nuts (10) are respectively threadedly engaged on each of the guide screws (8). The locking nuts (10) are located below the guide cylinders (9) to lock the height of the mounting platform (5). The support method includes the following steps: 1) Manually rotate the handwheel to adjust the height of the mounting platform, drive the first roller and the second roller to respectively abut against both sides of the lower half of the circumferential surface of the mandrel of the horizontal extruder, and rotate the height of the locking nut to abut against the lower end of the corresponding guide cylinder to lock the height of the mounting platform and effectively support the corresponding rod section of the mandrel of the horizontal extruder. 2) When the mandrel of the horizontal extruder is operating, the drive mechanism drives the mounting base to move synchronously with the mandrel of the horizontal extruder to maintain the support strength for the corresponding rod section of the mandrel of the horizontal extruder.

2. The method for supporting the mandrel of a horizontal extrusion machine according to claim 1, wherein: The mounting base (1) is slidably or rollingly engaged on the base track of the horizontal extruder.

3. The method for supporting the mandrel of the horizontal extrusion machine according to claim 1, characterized in that: The drive mechanism (2) is a hydraulic cylinder. The cylinder body of the hydraulic cylinder is fixed on the horizontal extruder, and the piston rod of the hydraulic cylinder extends horizontally and is hinged to the mounting base (1).

4. The supporting method for the mandrel of the horizontal extrusion machine according to claim 1, characterized in that: The output bevel gear and the input bevel gear of the bevel gear pair (12) are respectively rotatably mounted on the mounting base (1) through bearings.

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