Intelligent upper anvil of hydraulic quick forging machine and control method

Abstract

The present application relates to a kind of hydraulic quick forging machine intelligent upper anvil and control method.The upper anvil of hydraulic quick forging machine is set to floating body, first spring group is set between movable beam and upper anvil, second spring group is set between lower end head shoulder and upper anvil, and initial compression amount is set, to ensure the pre-tightening force between movable beam and upper anvil and between upper anvil and lower end head shoulder, while realizing the flexible contact extrusion between upper anvil and forging in idle stroke fast down stroke.Setting a certain stroke of flexible contact extrusion, idle stroke fast down pressure supply circuit is switched to pressure supply circuit to supply pressure oil, which greatly reduces the "hammering" phenomenon in working process.When returning, movable beam immediately obtains the extrusion of first spring group upward, instantaneous response is returned, second spring group is compressed, upper anvil delays uplink return, avoids the huge inertia of movable beam and upper anvil simultaneously returning, greatly reduces vibration and improves the speed of return.

Description

Technical Field

[0001] This invention relates to an anvil of a hydraulic high-speed forging machine, specifically to an anvil of a hydraulic high-speed forging machine configured as a floating body with elasticity, and to controlling its operation process, belonging to the field of mechanical design and manufacturing technology. Background Technology

[0002] Hydraulic forging machines are indispensable equipment in modern industry, capable of forging billets into various shapes and sizes. With the rapid development of the social economy, the demand for large-scale high-speed forging hydraulic presses has surged. However, in practical applications, as hydraulic high-speed forging machines become increasingly larger and their forging speeds increase, many drawbacks arise. For example, the "hammer-hammering" phenomenon becomes more severe, and significant noise and vibration are generated. Furthermore, the large inertia of the moving beam, upper anvil, and seat of the high-speed forging machine results in slow return response and long return time, affecting the forging frequency and hindering the widespread application of extra-large hydraulic high-speed forging machines. Summary of the Invention

[0003] In response to the problems mentioned in the background art, this invention proposes an intelligent upper anvil and control method for a hydraulic high-speed forging machine. The upper anvil of the hydraulic high-speed forging machine is set as a floating body, and the floating stroke and elastic force are set according to the downward and return working conditions of the hydraulic high-speed forging machine to improve the return response speed and reduce "hammering" and vibration.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: an intelligent upper anvil for a hydraulic high-speed forging machine, comprising: a movable beam, an upper anvil seat, an anvil, a liquid supply system, and a PLC. The upper anvil seat is connected to the movable beam on top and to the anvil on the bottom. The liquid supply system includes idle stroke rapid descent, pressurization, and return stroke liquid supply circuits. The PLC controls the operation of the liquid supply system. Its characteristic is that:

[0005] A first spring assembly is provided between the movable beam and the upper anvil;

[0006] The first spring assembly is set with an initial compression amount, and its compression force is the preload force between the movable beam and the upper anvil.

[0007] The floating travel of the upper anvil is the floating stroke, and the maximum floating stroke is the floating distance;

[0008] A sensor is installed between the movable beam and the upper anvil;

[0009] The sensor is a displacement sensor that detects the floating stroke of the upper anvil.

[0010] The upper anvil is connected to the movable beam by a positioning bolt, which passes upward through the upper anvil. A second spring assembly is provided between the lower end shoulder and the upper anvil.

[0011] The second spring assembly is set with an initial compression amount, and its compression force is the preload force between the upper anvil and the lower end shoulder;

[0012] The distance between the movable beam and the lower end shoulder is the length of the positioning bolt. Adjusting the length of the bolt changes the preload and the floating distance between the movable beam, the first spring group, the upper anvil, and the second spring group.

[0013] The control method for the aforementioned intelligent anvil is as follows:

[0014] When the movable beam moves downward, the idle stroke quick-down liquid supply circuit supplies pressure oil, the upper anvil contacts the forging, the upper anvil seat squeezes the first spring group, the upper anvil flexibly squeezes the forging, when the floating stroke reaches the first set value, the PLC commands the idle stroke quick-down liquid supply circuit to switch to the pressurized liquid supply circuit to supply pressure oil, the movable beam continues to move downward and fits with the upper anvil seat, the upper anvil rigidly squeezes the forging;

[0015] During the upward return stroke of the movable beam, the first spring group presses the movable beam upward and the upper anvil downward, causing the movable beam to respond instantly to the return stroke. The second spring group is compressed, and the upper anvil delays its upward return stroke. When the floating stroke reaches the second set value, the PLC commands the return fluid supply circuit to supply pressure oil, and the movable beam and the upper anvil quickly return to their upward positions.

[0016] Furthermore, the sensor is configured as a pressure sensor to detect the elastic force information of the first spring group in real time. When the set value is reached, the PLC commands the idle stroke rapid downward liquid supply circuit to switch to the pressurized liquid supply circuit to supply pressurized oil.

[0017] Preferably, the springs selected for the first spring group and the second spring group are butterfly springs.

[0018] This invention incorporates a first spring assembly between the movable beam and the upper anvil. The movable beam presses downwards against the upper anvil via the first spring assembly, causing the upper anvil and anvil to suspend below the movable beam. This creates flexible contact compression between the upper anvil and the forging. During this flexible contact compression, the fluid supply system switches from a fast-down, idle-stroke fluid supply circuit to a pressurized fluid supply circuit, resulting in rigid contact compression between the upper anvil and the forging, significantly reducing the "hammering" phenomenon. During the return stroke, the movable beam immediately receives upward compression from the first spring assembly, responding instantaneously to the return stroke. The second spring assembly is compressed, and the upper anvil's upward return stroke is delayed. This avoids the significant inertia of the simultaneous return stroke of the movable beam and the upper anvil, greatly reducing vibration and increasing the return speed. Attached Figure Description

[0019] Appendix Figure 1 This is a partial cross-sectional view of the present invention.

[0020] Appendix Figure 2 This is a top view of the upper anvil and the limiting frame.

[0021] Appendix Figure 3 For the appendix Figure 1 Enlarged view of the partial sectional structure after removal.

[0022] Appendix Figure 4 For the appendix Figure 3 Part I is removed from the enlarged view.

[0023] Appendix Figure 5 For the appendix Figure 3 The enlarged view of section II is removed.

[0024] In the attached diagram, 1 is the hydraulic press, 2 is the movable beam, 3 is the upper anvil, 4 is the upper anvil, 5 is the limiting frame, 6 is the first spring group, 7 is the positioning bolt, 8 is the second spring group, 9 is the spring guide post, 301 is the spring countersunk hole seat, 302 is the positioning bolt hole, and 701 is the lower end shoulder. Detailed Implementation

[0025] The attached figure shows a schematic diagram of part of the hydraulic press 1. Some components related to this invention are shown; the remaining components are not shown but are essentially the same as those in known hydraulic presses. The invention will now be further described in conjunction with the attached figures.

[0026] As attached Figure 1 , 2 As shown in Figures 3, 4, and 5, the movable beam 2 is fitted inside the column of the hydraulic press 1 and moves up and down along the column. The upper anvil 3 is suspended below the movable beam 2 by a positioning bolt 7. A first spring assembly 6 is provided between the movable beam 2 and the upper anvil 3, and a second spring assembly 8 is provided between the upper anvil 3 and the lower end shoulder 701 of the positioning bolt 7. The first spring assembly 6 and the second spring assembly 8 with different elastic capacities can be selected according to the set requirements. By changing the length of the rod of the positioning bolt 7, the compression of the first spring assembly 6 and the second spring assembly 8 can be adjusted, so that the set preload is achieved between the movable beam 2 and the upper anvil 3, and between the upper anvil 3 and the lower end shoulder 701. The set amount of the preload is determined based on the hammering conditions and the return response requirements.

[0027] The upper anvil 3 floats up and down within the downward-facing limiting frame 5 below the movable beam 2. A spring countersunk seat 301 is positioned on top of the upper anvil 3, and the first spring assembly 6 is placed on the spring countersunk seat 301, with its upper end pressing against the bottom of the movable beam 2 and its lower end pressing against the top of the upper anvil 3. Positioning bolt holes 302 are provided around the periphery of the upper anvil 3, and positioning bolts 7 pass through the positioning bolt holes 302 and are screwed onto the bottom of the movable beam 2, causing the upper anvil 3 to move along the positioning bolts 7 under the clamping of the first and second spring assemblies. The upper anvil 4 moves up and down with the upper anvil 3.

[0028] As the movable beam 2 descends, the idle stroke rapid descent fluid supply circuit supplies pressurized oil, the upper anvil 4 contacts the forging, the upper anvil seat 3 squeezes the first spring assembly 6, and the upper anvil 4 flexibly squeezes the forging. When the floating stroke between the upper anvil seat 3 and the movable beam 2 reaches the first set value, the PLC commands the idle stroke rapid descent fluid supply circuit to switch to the pressurized fluid supply circuit to supply pressurized oil, the movable beam 3 continues to descend and fits against the upper anvil seat 3, and the upper anvil 4 rigidly squeezes the forging.

[0029] When the movable beam 2 moves upward and returns, the first spring group 6 presses the movable beam 2 upward and the upper anvil 3 downward. The movable beam 2 responds instantly to the return stroke, the second spring group 8 is compressed, and the upper anvil 3 delays the upward return stroke. When the floating stroke reaches the second set value, the PLC commands the return fluid supply circuit to supply pressure oil, and the movable beam 2 and the upper anvil 3 quickly move upward and return.

Claims

1. A control method for an intelligent upper anvil of a hydraulic high-speed forging machine, comprising: The system comprises a movable beam, an upper anvil seat, an upper anvil, a liquid supply system, and a PLC. The upper anvil seat is connected to the movable beam above and the upper anvil below. The liquid supply system includes idle-stroke rapid descent, pressurization, and return liquid supply circuits. The PLC controls the operation of the liquid supply system. Its distinguishing feature is that: A first spring assembly is provided between the movable beam and the upper anvil; The first spring assembly is set with an initial compression amount, and its compression force is the preload force between the movable beam and the upper anvil. The floating travel of the upper anvil is the floating stroke, and the maximum floating stroke is the floating distance; A sensor is installed between the movable beam and the upper anvil; The sensor is a displacement sensor that detects the floating stroke of the upper anvil. The upper anvil is connected to the movable beam by a positioning bolt. The positioning bolt passes upward through the upper anvil, and a second spring assembly is provided between the bolt head shoulder and the upper anvil. The second spring assembly is set with an initial compression amount, and its compression force is the preload force between the upper anvil and the bolt head shoulder; Adjust the length of the positioning bolt to change the preload between the movable beam and the first spring group and between the upper anvil and the second spring group, as well as the floating distance of the upper anvil; When the movable beam moves downward, the idle stroke fast downward liquid supply circuit supplies oil, the upper anvil contacts the forging, the upper anvil seat squeezes the first spring group, the upper anvil flexibly squeezes the forging, when the floating stroke reaches the set value, the PLC commands the idle stroke fast downward liquid supply circuit to switch to the pressurized liquid supply circuit to supply pressurized oil, until the upper anvil seat is in contact with the movable beam, the upper anvil rigidly squeezes the forging. During the upward return stroke of the movable beam, the PLC commands the pressurized fluid supply circuit to switch to the return fluid supply circuit to supply pressurized oil. The movable beam is squeezed upward by the first spring group and the pressurized oil of the return fluid supply circuit, responding instantly and quickly moving upward and returning. The upper anvil is squeezed downward by the first spring group, the second spring group is compressed, and the upper anvil is delayed in moving upward and returning.

2. The control method for an intelligent upper anvil of a hydraulic high-speed forging machine according to claim 1, characterized in that: The springs used in the first and second spring groups are butterfly springs.

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