Hydraulic cylinder for a large forging press

Abstract

The utility model relates to a hydraulic cylinder of large -scale forging machine, hydraulic cylinder sets up six, and all are two -way action hydraulic cylinders, and arrange according to setting distance, wherein set up two equal diameter hydraulic cylinders, and the spacing is arranged on the transverse center line of upper crossbeam, the remaining four hydraulic cylinders equal diameter, and symmetrically arrange around the above two hydraulic cylinders, and the center of every two hydraulic cylinders is about the upper crossbeam center symmetry. The utility model has: design novel, arrange scientific and reasonable, increase the bending -resistant ability of upper crossbeam, the advantages such as convenient production and cost saving.

Description

Technical Field

[0001] This utility model relates to a hydraulic cylinder for a large-scale top-pressure forging machine, specifically to the number of hydraulic cylinders configured for a top-pressure forging machine, and belongs to the field of hydraulic transmission technology. Background Technology

[0002] Traditional top-pressure forging hydraulic presses use multiple hydraulic cylinders on the upper crossbeam to move the movable beam up and down, thus performing the forging process. Large forging machines typically have three hydraulic cylinders for rolling: one positioned at the center of the upper crossbeam, and the other two symmetrically arranged. This arrangement results in a large torque exerted on the upper crossbeam by the hydraulic cylinders, leading to increased deformation. To increase the rigidity of the upper crossbeam, its size must be designed to be large, which wastes materials, increases costs, and adds to the difficulty of manufacturing and hoisting. Therefore, it is necessary to optimize the number and arrangement of hydraulic cylinders in existing large forging machines. Utility Model Content

[0003] In response to the problems raised in the background art, this utility model provides a hydraulic cylinder for a large forging machine, which sets a specific number of bidirectional hydraulic cylinders and sets them in a specific position to achieve the purpose of reducing the volume of the upper crossbeam and improving its bending resistance.

[0004] To achieve the above objectives, this utility model proposes a hydraulic cylinder for a large forging machine, comprising: a column, an upper crossbeam, a hydraulic cylinder, and a movable beam. The upper crossbeam is fixed to the top of the column, and the movable beam is sleeved on the column. The cylinder body of the hydraulic cylinder is fixed to the upper crossbeam, and the lower end of its piston rod is fixedly connected to the movable beam, causing it to slide up and down along the column. When pressurized oil is supplied to the rod-side chamber of the hydraulic cylinder, the movable beam rises; when pressurized oil is supplied to the rodless chamber of the hydraulic cylinder, the movable beam depresses. The upper crossbeam is fixed by four columns, and the center line connecting the four columns forms a rectangle with the length direction being transverse and the width direction being longitudinal. Its distinguishing feature is: The hydraulic cylinders are configured to be six; Two hydraulic cylinders of equal diameter are provided in the hydraulic cylinder and are arranged at intervals along the center line of the rectangle's length direction (i.e., the transverse center line of the upper crossbeam). The remaining four hydraulic cylinders are of equal diameter and are symmetrically arranged around the two hydraulic cylinders mentioned above, and the centers of each pair of hydraulic cylinders are symmetrical about the center of the upper crossbeam. Let: the length of the rectangle be L, the diameter of the hydraulic cylinder on the centerline of the rectangle be D, the distance from its center to the width near the near end of the rectangle be L1, and the distance from the centers of the other four hydraulic cylinders to the width near the near end of the rectangle be L2, then: The distance between the two hydraulic cylinders on the centerline of the rectangle's length direction is L - 2L1 - D, and should satisfy: L / 8 ≤ L - 2L1 - D ≤ L / 5. The lateral distance between the center of the hydraulic cylinder on the midline of the rectangle's length and the centers of two adjacent hydraulic cylinders is L1-L2, and should satisfy: L1-L2 2， ≧D / 2.

[0005] Furthermore, the diameter of the hydraulic cylinder on the centerline of the upper crossbeam along its length is greater than or equal to the diameter of the four hydraulic cylinders arranged around it.

[0006] Preferably, the rod chambers of the two hydraulic cylinders located on the centerline of the upper crossbeam along its length are balancing hydraulic cylinders that support the weight of the movable beam.

[0007] Preferably, the rod chambers of the four hydraulic cylinders arranged around the two hydraulic cylinders along the centerline of the upper crossbeam are balancing hydraulic cylinders that support the weight of the movable beam.

[0008] In this invention, six hydraulic cylinders are installed on the upper crossbeam of the forging machine, and their arrangement on the upper crossbeam is optimized. This improves upon the traditional method of placing a hydraulic cylinder at the center of the upper crossbeam, eliminating the centrally located cylinder and avoiding the extreme torque exerted on the moving beam by the central hydraulic cylinder. While maintaining constant hydraulic press pressure, this reduces the deformation of the upper crossbeam, enhances its strength and bending resistance, and achieves the goal of reducing the volume and weight of the upper crossbeam.

[0009] This utility model has the advantages of novel design, scientific and reasonable layout, increased bending resistance of the upper crossbeam, convenient manufacturing and cost saving. Attached Figure Description

[0010] Appendix Figure 1 This is a schematic diagram of the main sectional structure of this utility model; Appendix Figure 2 This is a top view of the structure of this utility model; Appendix Figure 3 For the appendix Figure 2 Schematic diagram of the cross-sectional structure along the AA direction.

[0011] In the attached diagram, 1 is the upper crossbeam, 2 is the movable beam, and a, b, c, d, e, and f are hydraulic cylinders. Figure 2 The midpoint line is the rectangle formed by connecting the centers of the four columns. L is the length of the rectangle, D is the diameter of the hydraulic cylinder located on the center line of the rectangle, L1 is the distance from the center of the hydraulic cylinder located on the center line of the rectangle to the width of the near end of the rectangle, and L2 is the distance from the center of the four hydraulic cylinders surrounding the hydraulic cylinder located on the center line of the rectangle to the width of the near end of the rectangle. Detailed Implementation

[0012] Appendix Figure 1 , 2Figure 3 shows an embodiment where four columns fix and support the upper beam 1. Six hydraulic cylinders a, b, c, d, e, and f are installed in the figure. Hydraulic cylinders a and b are positioned on the centerline of the rectangle formed by the lines connecting the centers of the four columns. The distance between the centers of hydraulic cylinders a and b is L - 2L1 - D, and should satisfy: L / 8 ≤ L - 2L1 - D ≤ L / 5. The lateral distance between the center of hydraulic cylinder a and the centers of hydraulic cylinders e and f is L1 - L2, and should satisfy: L1 - L2 ≥ D / 2. Similarly, the lateral distance between the center of hydraulic cylinder b and the centers of hydraulic cylinders c and d is L1 - L2, and should satisfy: L1 - L2 ≥ D / 2.

[0013] Hydraulic cylinders a, b, c, d, e, and f are all bidirectional hydraulic cylinders. Different pressure oils are supplied to the rod-side and rodless-side chambers of each cylinder to perform different functional operations. Appropriate pressure oil can be filled into the rod-side chambers of cylinders a and b to support the weight of the movable beam 2 during forging machine operation, thus accelerating the return stroke and increasing the stability of the movable beam. Similarly, appropriate pressure oil can be filled into the rod-side chambers of cylinders c, d, e, and f to support the weight of the movable beam 2 during forging machine operation, accelerating the return stroke and increasing the stability of the movable beam.

Claims

1. A hydraulic cylinder for a large forging machine, comprising: The system comprises a column, an upper crossbeam, a hydraulic cylinder, and a movable beam. The upper crossbeam is fixed to the top of the column, and the movable beam is fitted onto the column. The cylinder body of the hydraulic cylinder is fixed to the upper crossbeam, and the lower end of its piston rod is fixedly connected to the movable beam, causing it to slide up and down along the column. When pressurized oil is supplied to the rod-side chamber of the hydraulic cylinder, the movable beam rises; when pressurized oil is supplied to the rodless chamber of the hydraulic cylinder, the movable beam presses down. The upper crossbeam is fixed by four columns, and the center line connecting the four columns forms a rectangle with the length direction being transverse and the width direction being longitudinal. Its distinguishing feature is: The hydraulic cylinders are configured to be six; Two hydraulic cylinders of equal diameter are provided in the hydraulic cylinder and are arranged at intervals along the center line of the rectangle. The remaining four hydraulic cylinders are of equal diameter and are symmetrically arranged around the two hydraulic cylinders. The centers of each pair of hydraulic cylinders are symmetrical about the center of the upper crossbeam. Let: the length of the rectangle be L, the diameter of the hydraulic cylinder on the centerline of the rectangle be D, the distance from its center to the width near the near end of the rectangle be L1, and the distance from the centers of the other four hydraulic cylinders to the width near the near end of the rectangle be L2, then: The distance between the two hydraulic cylinders on the centerline of the rectangle's length direction is L - 2L1 - D, and should satisfy: L / 8 ≤ L - 2L1 - D ≤ L / 5. The lateral distance between the center of the hydraulic cylinder on the centerline of the rectangle and the centers of the two adjacent hydraulic cylinders around it is L1-L2, which should satisfy: L1-L2≧D / 2.

2. The hydraulic cylinder of a large forging machine according to claim 1, characterized in that: The diameter of the hydraulic cylinder on the centerline of the upper crossbeam along its length is greater than or equal to the diameter of the four hydraulic cylinders surrounding it.

3. The hydraulic cylinder of a large forging machine according to claim 1, characterized in that: The rod chambers of the two hydraulic cylinders located on the centerline of the upper crossbeam along its length are balancing hydraulic cylinders that support the weight of the movable beam.

4. The hydraulic cylinder of a large forging machine according to claim 1, characterized in that: The rod chambers of the four hydraulic cylinders located around the two hydraulic cylinders along the centerline of the upper crossbeam are balancing hydraulic cylinders that support the weight of the movable beam.

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