HYDRAULIC ROLLING-CUT SHEARS

Abstract

A hydraulic rolling-cut shears, including: a horizontally disposed hydraulic cylinder; a shear mechanism including an upper tool post and a lower tool post; a linkage mechanism including a first upper connecting rod, a first lower connecting rod, a second upper connecting rod, a second lower connecting rod, and a synchronous connecting rod; and supports including a hydraulic cylinder support and a guiding rod support. The hydraulic cylinder is hinged to and disposed on the hydraulic cylinder support through a first pin. One end of the first upper connecting rod, one end of the first lower connecting rod, and one end of the synchronous connecting rod are hinged to one end of a piston rod of the hydraulic cylinder via a second pin. The first upper connecting rod, the synchronous connecting rod, and the first lower connecting rod are disposed at one side of the hydraulic cylinder support.

Claims

1. A hydraulic rolling-cut shears, comprising: a horizontally disposed hydraulic cylinder; a shear mechanism comprising an upper tool post and a lower tool post; a linkage mechanism comprising a first upper connecting rod, a first lower connecting rod, a second upper connecting rod, a second lower connecting rod, and a synchronous connecting rod; and supports comprising a hydraulic cylinder support and a guiding rod support; wherein the hydraulic cylinder is hinged to and disposed on the hydraulic cylinder support through a first pin; one end of the first upper connecting rod, one end of the first lower connecting rod, and one end of the synchronous connecting rod are hinged to one end of a piston rod of the hydraulic cylinder via a second pin; the first upper connecting rod, the synchronous connecting rod, and the first lower connecting rod are disposed at one side of the hydraulic cylinder support, and are disposed from top to bottom in that order; the other end of the synchronous connecting rod is hinged to one end of the second upper connecting rod and one end of the second lower connecting rod via a third pin; the second upper connecting rod and the second lower connecting rod are disposed at one side of the guiding rod support; the other end of the first upper connecting rod and the other end of the second upper connecting rod both are hinged to an upper beam via a fourth pin; the other end of the first lower connecting rod and the other end of the second lower connecting rod are both hinged to an upper tool post; an angle between the first upper connecting rod and a perpendicular line is defined as ; an angle between the first lower connecting rod and the perpendicular line is defined as .sub.1; an angle between the second upper connecting rod and the perpendicular line is defined as ; an angle between the second lower connecting rod and the perpendicular line is defined as .sub.1; one end of a guiding rod is hinged to the upper tool post, and the other end of the guiding rod is hinged to the guiding rod support; an angle between the guiding rod and a horizontal line is defined as , and is 5 degrees; when in use, the hydraulic cylinder drives the first upper connecting rod, the first lower connecting rod, and the synchronous connecting rod, and the synchronous connecting rod transmits power to the second upper connecting rod and the second lower connecting rod, so that a synchronous movement of the first upper connecting rod, the first lower connecting rod, the second upper connecting rod, the second lower connecting rod, and the synchronous connecting rod is achieved, driving the upper tool post to conduct rolling cut; whether the piston rod is stretched out or retracted, the rolling cut on metal sheet is conducted; and the first upper connecting rod, the first lower connecting rod, the second upper connecting rod, and the second lower connecting rod are not in alignment with one another.

2. The shear of claim 1, having the following structure parameters: a distance H from a first hinge joint connecting the first upper connecting rod and the upper beam to a second hinge joint connecting the second upper connecting rod and the upper beam is between 1000 and 5000 mm; the first upper connecting rod and the first lower connecting rod have an equal length M, and M is between 200 and 2500 mm; the second upper connecting rod and the second lower connecting rod have an equal length N, and N is between 200 and 2500 mm; the angle between the first upper connecting rod and the perpendicular line and the angle .sub.1 between the first lower connecting rod and the perpendicular line are equal, and are between 25 degrees and 25 degrees; and the angle between the second upper connecting rod and the perpendicular line and the angle .sub.1 between the second lower connecting rod and the perpendicular line are equal, and are between 35 degrees and 35 degrees.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] FIG. 1 is a schematic diagram of a rolling-cut shear driven by a single hydraulic cylinder in accordance with one embodiment of the invention;

[0024] FIG. 2 is a diagram showing a cut-in process of a rolling-cut shear driven by a single hydraulic cylinder when a hydraulic cylinder is stretched out in accordance with one embodiment of the invention;

[0025] FIG. 3 is a diagram showing a rolling-cut process of a rolling-cut shear driven by a single hydraulic cylinder when a hydraulic cylinder is stretched out in accordance with one embodiment of the invention;

[0026] FIG. 4 is a diagram showing a cut-out process of a rolling-cut shear driven by a single hydraulic cylinder when a hydraulic cylinder is stretched out in accordance with one embodiment of the invention;

[0027] FIG. 5 is a diagram showing a cut-off process of a rolling-cut shear driven by a single hydraulic cylinder when a hydraulic cylinder is stretched out in accordance with one embodiment of the invention;

[0028] FIG. 6 is a diagram showing a cut-in process of a rolling-cut shear driven by a single hydraulic cylinder when a hydraulic cylinder is retracted in accordance with one embodiment of the invention;

[0029] FIG. 7 is a diagram showing a rolling-cut process of a rolling-cut shear driven by a single hydraulic cylinder when a hydraulic cylinder is retracted in accordance with one embodiment of the invention;

[0030] FIG. 8 is a diagram showing a cut-out process of a rolling-cut shear driven by a single hydraulic cylinder when a hydraulic cylinder is retracted in accordance with one embodiment of the invention; and

[0031] FIG. 9 is a diagram showing a cut-off process of a rolling-cut shear driven by a single hydraulic cylinder when a hydraulic cylinder is retracted in accordance with one embodiment of the invention.

[0032] In the drawings, the following reference numbers are used: 1. Upper beam; 2. First upper connecting rod; 3. Synchronous connecting rod; 4. Second upper connecting rod; 5. Second lower connecting rod; 6. First lower connecting rod; 7. Hydraulic cylinder; 8. Hydraulic cylinder support; 9. Guiding rod support; 10. Guiding rod; 11. Upper tool post; 12. Metal sheet; and 13. Lower tool post.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Example 1

[0033] As shown in FIGS. 1-9, a rolling-cut shear driven by a single hydraulic cylinder comprises: a horizontally disposed hydraulic cylinder, a shear mechanism, a linkage mechanism, and supports. The hydraulic cylinder 7 is hinged to and disposed on a hydraulic cylinder support 8 through a first pin. An end of a piston rod of the hydraulic cylinder 7 is hinged to one end of a first upper connecting rod 2, one end of a first lower connecting rod 6, and one end of the synchronous connecting rod 3 via a second pin. The first upper connecting rod, the synchronous connecting rod, and the first lower connecting rod are disposed at one side of the hydraulic cylinder support 8, and are disposed from top to bottom in that order. The other end of the synchronous connecting rod 3 is hinged to one end of the second upper connecting rod 4 and one end of the second lower connecting rod 5 via a third pin. The second upper connecting rod and the second lower connecting rod are disposed at one side of the guiding rod support 9. The other end of the first upper connecting rod and the other end of the second upper connecting rod are hinged to an upper beam 1 via a fourth pin. The other end of the first lower connecting rod and the other end of the second lower connecting rod are hinged to an upper tool post 11. An angle between the first upper connecting rod 2 and a perpendicular line is defined as . The first upper connecting rod is disposed at one side of the hydraulic cylinder support 8. An angle between the first lower connecting rod 6 and the perpendicular line is defined as .sub.1. The first lower connecting rod is disposed at one side of the hydraulic cylinder support 8, and =.sub.1=25-25 . An angle between the second upper connecting rod 4 and the perpendicular line is defined as . The second upper connecting rod is disposed at one side of guiding rod support 9. An angle between the second lower connecting rod 5 and the perpendicular line is defined as .sub.1. The second lower connecting rod is disposed at one side of the guiding rod support 9, and =.sub.1=35-35 . One end of a guiding rod 10 is hinged to the upper tool post 11, and the other end of the guiding rod is hinged to the guiding rod support 9. An angle between the guiding rod 10 and a horizontal line is defined as , and is 5 degrees. When the cutting begins, a distance from the piston rod of the hydraulic cylinder 7 to a bottom of the hydraulic cylinder is defined as L. The piston rod of the hydraulic cylinder 7 is stretched out, and drives the first upper connecting rod 2, the first lower connecting rod 6, and the synchronous connecting rod 3 which are disposed at one side of the hydraulic cylinder support 8, and the synchronous connecting rod 3 operates to transmit power to the second upper connecting rod 4 and the second lower connecting rod 5 which are disposed at one side of the guiding rod support 9, therefore, a synchronous movement of the first upper connecting rod, the first lower connecting rod, the second upper connecting rod, and the second lower connecting rod is achieved, and the upper tool post 11 is driven to conduct rolling cut, then the metal sheet 12 fixed at the lower tool post 13 is cut. As shown in FIG. 2, when the distance from the piston rod of the hydraulic cylinder 7 to the bottom of the hydraulic cylinder is L1, the sheer is in the cut-in process. As shown in FIG. 3, when the distance from the piston rod of the hydraulic cylinder 7 to the bottom of the hydraulic cylinder is L2, the sheer is in the rolling-cut process. As shown in FIG. 4, when the distance from the piston rod of the hydraulic cylinder 7 to the bottom of the hydraulic cylinder is L3, the sheer is in the cut-out process. As shown in FIG. 5, when the distance from the piston rod of the hydraulic cylinder 7 to the bottom of the hydraulic cylinder is L4, the sheer is in the cut-off process. The rolling cut can be conducted when the piston rod of the hydraulic cylinder is retracted, and as shown in FIG. 6, when the distance from the piston rod of the hydraulic cylinder 7 to the bottom of the hydraulic cylinder is L3, the sheer is in the cut-in process; as shown in FIG. 7, when the distance from the piston rod of the hydraulic cylinder 7 to the bottom of the hydraulic cylinder is L2, the sheer is in the rolling-cut process; as shown in FIG. 8, when the distance from the piston rod of the hydraulic cylinder 7 to the bottom of the hydraulic cylinder is L1, the sheer is in the cut-out process; and as shown in FIG. 9, when the distance from the piston rod of the hydraulic cylinder 7 to the bottom of the hydraulic cylinder is L, the sheer is restored to the initial state.

[0034] The first upper connecting rod 2, the first lower connecting rod 6, the second upper connecting rod 4, and the second lower connecting rod 5 are not in alignment with one another. The first upper connecting rod and the first lower connecting rod are disposed at one side of the hydraulic cylinder support 8, and the second upper connecting rod and the second lower connecting rod are disposed at one side of the guiding rod support 9. The angle between the first upper connecting rod 2 which is disposed at one side of the hydraulic cylinder support 8 and the perpendicular line is different from the angle between the second upper connecting rod 4 which is disposed at one side of the guiding rod support 9 and the perpendicular line, and the difference is between 5 degrees to 15 degrees.

[0035] Ranges of the key structure parameters of the sheer in the example are as follows:

[0036] A distance H from a first hinge joint connecting the first upper connecting rod 2 and the upper beam to a second hinge joint connecting the second upper connecting rod 4 and the upper beam is between 1000 and 5000 mm.

[0037] The first upper connecting rod 2 and the first lower connecting rod 6 have an equal length M, and M is between 200 and 2500 mm.

[0038] The second upper connecting rod 4 and the second lower connecting rod 5 have an equal length N, and N is between 200 and 2500 mm.

[0039] The angle between the first upper connecting rod 2 and the perpendicular line and the angle .sub.1 between the first lower connecting rod 6 and the perpendicular line are equal, and are between 25 degrees and 25 degrees.

[0040] The angle between the second upper connecting rod 4 and the perpendicular line and the angle .sub.1 between the second lower connecting rod 5 and the perpendicular line are equal, and are between 35 degrees and 35 degrees.

[0041] The ranges of optimized parameters of the rolling-cut sheer driven by a single hydraulic cylinder in terms of different specifications are as shown in Table 1:

TABLE-US-00001 TABLE 1 Shear , .sub.1 , .sub.1 specifications H (mm) M (mm) N (mm) ( = .sub.1) ( = .sub.1) Type 2000 1000-1800 200-850 200-850 25-25 35-35 Type 2500 1200-2500 400-1100 400-1100 25-25 35-35 Type 3200 1500-3200 550-1500 550-1500 25-25 35-35 Type 4000 2000-4100 650-2000 650-2000 25-25 35-35 Type 5000 2500-5000 700-2500 700-2500 25-25 35-35 Note: 1. The shear specifications are named according to the width dimensions (unit: mm) of the steel plate. 2. H is the distance from a first hinge joint connecting the first upper connecting rod 2 and the upper beam to a second hinge joint connecting the second upper connecting rod 4 and the upper beam. 3. M is the length of the first upper connecting rod 2 and the first lower connecting rod 6. [0042] N is the length of the second upper connecting rod 4 and the second lower connecting rod 5. [0043] 4. is the angle between the first upper connecting rod 2 and the perpendicular line, and .sub.1 is the angle between the first lower connecting rod 6 and the perpendicular line. [0044] 5. is the angle between the second upper connecting rod 4 and the perpendicular line, and .sub.1 is the angle between the second lower connecting rod 5 and the perpendicular line.