Hydraulic machine forging tool anti-sliding device and interlocking logic control method thereof

Abstract

The invention discloses a hydraulic machine forging tool anti-sliding device which comprises an upper anvil, a lower anvil and a hydraulic machine, the upper anvil and the lower anvil are used for forging, the lower anvil is arranged on a workbench of the hydraulic machine, wedge-shaped faces are formed on the two sides of the lower portion of the lower anvil, and wedge-shaped plates are matched with the wedge-shaped faces. The whole body is embedded in the workbench, the output end adopts a linkage rod structure, and double hook plates are configured as an executing mechanism to do circular motion; the double hook plates are matched with the clamping grooves, meanwhile, the wedge-shaped blocks are matched with the wedge-shaped faces for clamping, and therefore the tool is clamped, and the problem that the tool slides during eccentric and inclined forging can be effectively solved. And the factor that the static friction force between the lower anvil and the working table is changed due to the change of the friction coefficient in the using process, so that the locking force is unstable is avoided. The action of the device is logically interlocked with the actions of the driving cylinder and the sliding block, so that the damage of equipment caused by action interference can be effectively reduced.

Description

Technical Field:

[0001] The present invention relates to the technical field of hydraulic press tooling, and specifically to an anti-slip displacement device for a hydraulic press forging tooling and its interlock logic control method. Background Art:

[0002] Defects of the prior art: 1. When the deflection angle of the forging is relatively large, the frictional force generated between the tooling and the workbench through the normal pressure and the static friction coefficient is less than the lateral force generated during deflection, which will cause the tooling to exhibit lateral slip. As shown in Figure 1 , the friction coefficient between the lower anvil and the workbench is f, and the weight of the lower anvil is ignored. If the lower anvil is not to deflect, then: F1 < F×f; Through Figure 2 it can be obtained that: F1 = tanθF; It can be deduced that tanθF < F×f, that is, tanθ < f. Generally, the friction coefficient between the lower anvil and the workbench is between 0.15 and 0.35, that is, f = 0.15 - 0.35. Taking the maximum value f = 0.35, so the deflection angle of the workpiece is such that tanθ < 0.35, θ < 19°. In summary, once the deflection angle θ of the workpiece is greater than 19°, the lower anvil cannot be self-locked through the friction coefficient, and the lower anvil will have a deflection problem; 2. For the driving cylinder to generate back pressure, the oil in the cylinder must be compressed. Therefore, when the pressure maintaining valve takes effect and builds back pressure, the tooling has already generated a certain displacement deviation due to the oil compression. And when the back pressure continues to rise, the safety valve takes effect, the oil overflows, and the piston of the driving cylinder also moves. Therefore, the slip problem cannot be completely solved. Summary of the Invention:

[0003] The purpose of the present invention is to solve the existing problems, and to provide an anti-slip displacement device for a hydraulic press forging tooling and its interlock logic control method.

[0004] The technical solution measures of the present invention are as follows:

[0005] An anti-slip displacement device for a hydraulic press forging tooling, including an upper anvil, a lower anvil for forging, and a hydraulic press. The lower anvil is placed on the workbench of the hydraulic press, and wedge-shaped surfaces are formed on both sides of its lower part. The wedge-shaped surfaces are matched with wedge-shaped plates, and the wedge-shaped plates are screwed to the workbench. Card slots are formed on both sides of the lower anvil, and hook plates that can move in an arc are arranged in the card slots to limit the movement of the lower anvil along the length direction of the wedge-shaped plate. An actuator for driving the hook plates is arranged on the workbench.

[0006] Preferably, the actuator includes a mounting seat, a driving cylinder, a linkage rod, a pin and a connecting sleeve. The mounting seat is fixed inside the workbench, the driving cylinder is fixed on the mounting seat, the lower part of the hook plate is hinged to the outside of the wedge-shaped plate, one end of the linkage rod is hinged to the hook plate, and the other end is hinged to the connecting sleeve. The lower end of the connecting sleeve is fixed to the piston rod of the driving cylinder.

[0007] Preferably, a protective sleeve is sleeved outside the connecting sleeve, and the protective sleeve is fixed on the mounting seat.

[0008] Preferably, a protective cover for preventing the anti-slip device from slipping is further arranged on the workbench.

[0009] Preferably, the cross-section of the wedge-shaped plate is a right trapezoid, and a notch for cooperating with the hook plate is formed thereon.

[0010] An interlocking logic control method for an anti-slip device of a forging tooling starts from "Instruction - Driving Cylinder MOVE". After the driving cylinder acts, first judge "Slider NOT UP END" (the slider has not reached the top dead center); if not satisfied (that is, the slider has already been at the top dead center), directly enter the "Slider UP END" (the slider reaches the top dead center) state; if satisfied (the slider has not reached the top dead center), then execute the "Slider UP" (the slider rises) action until reaching the "Slider UP END" (the slider reaches the top dead center) state;

[0011] After reaching "Slider UP END", there are two paths: one is to execute "Hook Plate OPEN" (the hook plate opens); the other is to execute "Hook Plate CLOSE" (the hook plate closes), and then perform "Hook Plate CHECK" (the hook plate check);

[0012] When "Hook Plate OPEN" is executed, "Driving Cylinder MOVE" (the driving cylinder moves) is executed. After the movement is completed, judge "Driving Cylinder NOTEND" (the driving cylinder has not reached the target position); if not satisfied (that is, the driving cylinder has reached the target position), enter "Driving Cylinder END" (the driving cylinder reaches the target position); if satisfied (not reached), execute "Driving Cylinder CHECK" (the driving cylinder check) until reaching "Driving Cylinder END";

[0013] After reaching "Driving Cylinder END", "Driving Cylinder MOVE END" (the driving cylinder movement ends) is executed, then "Hook Plate CLOSE" (the hook plate closes) is executed, then "Slider UP AND DOWN" (the slider rises and falls) is executed. After "Slider UP AND DOWN" is completed, "Hook Plate OPEN" (the hook plate opens) is executed, and finally "Hook Plate CHECK" (the hook plate check) is performed, thus completing a working cycle logic.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. A driving cylinder / oil cylinder is configured as the main power output source, which is integrally buried inside the workbench. The output end adopts a linkage rod structure, and a double hook plate is configured as an actuator to perform circular motion; the double hook plate cooperates with the card slot, and at the same time, the wedge-shaped block cooperates with the wedge surface to clamp, so as to clamp the tooling, which can effectively solve the problem of slippage of the tooling during eccentric and inclined forging.

[0016] 2. It avoids the static friction between the lower anvil and the workbench, which may change due to the change of the friction coefficient during use, thus leading to unstable locking force.

[0017] 3. The operation of this device is interlocked with the operation logic of the driving cylinder and the slider, which can effectively reduce the damage caused by operation interference of the equipment. Description of the Drawings:

[0018] Figure 1 It is a schematic diagram of the technical defect in the background art;

[0019] Figure 2 It is a schematic cross-sectional view of the hook plate in the loosened state of the present invention;

[0020] Figure 3 It is a schematic cross-sectional view of the hook plate in the locked state of the present invention;

[0021] Figure 4 It is a schematic top view of the present invention with the protective cover removed;

[0022] Figure 5 It is a flowchart of the control method of the present invention.

[0023] In the drawings: 1. Upper anvil; 2. Lower anvil; 3. Workbench; 4. Wedge surface; 5. Wedge plate; 6. Card slot; 7. Hook plate; 8. Mounting seat; 9. Driving cylinder; 10. Linking rod; 12. Connecting sleeve; 13. Protective sleeve; 14. Protective cover. Detailed Embodiments:

[0024] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0025] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention herein are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more of the related listed items.

[0027] As Figure 2-4 shown, an anti-slip device for a forging tool of a hydraulic press includes an upper anvil 1, a lower anvil 2 for forging, and a hydraulic press. The lower anvil 2 is placed on the workbench 3 of the hydraulic press, and wedge-shaped surfaces 4 are formed on both sides of its lower part. The wedge-shaped surfaces 4 are matched with wedge-shaped plates 5, and the wedge-shaped plates 5 are screwed to the workbench 3. Card slots 6 are formed on both sides of the lower anvil 2, and hook plates 7 capable of circular motion are arranged in the card slots 6 to limit the movement of the lower anvil 2 along the length direction of the wedge-shaped plate 5. An actuator for driving the hook plates 7 is arranged on the workbench 3.

[0028] Specifically, the actuator includes a mounting seat 8, a driving cylinder 9, a linkage rod 10, a shaft pin, and a connecting sleeve 12. The mounting seat 8 is fixed inside the workbench 3, the driving cylinder 9 is fixed on the mounting seat 8, the lower part of the hook plate 7 is hinged to the outside of the wedge-shaped plate 5, one end of the linkage rod 10 is hinged to the hook plate 7, and the other end is hinged to the connecting sleeve 12. The lower end of the connecting sleeve 12 is fixed to the piston rod of the driving cylinder 9.

[0029] Specifically, a protective sleeve 13 is sleeved outside the connecting sleeve 12, and the protective sleeve 13 is fixed to the mounting seat 8.

[0030] Specifically, a protective cover 14 for protecting the anti-slip device is further arranged on the workbench 3.

[0031] Specifically, the cross-section of the wedge-shaped plate 5 is a right trapezoid, and a notch for cooperating with the hook plate 7 is formed in it.

[0032] As Figure 2-4 shown, when the lower anvil 2 switches work positions, the hook plates 7 are in a loose state. After the lower anvil 2 moves to the work position, the driving cylinder 9 ejects, driving the connecting sleeve 12 to rise. Driven by the linkage rod 10, the hook plates 7 make circular motions and are clamped into the card slots 6 of the lower anvil 2. At this time, the hook plates 7 are in a locked state.

[0033] When forging a workpiece, the hook plates 7 are in a locked state, and a horizontal lateral force is generated on the lower anvil 2. Since the hook plates 7 are in the card slots 6 of the lower anvil 2, the horizontal force is transmitted to the hook plates 7. The lower half of the hook plates 7 is installed in the notches of the wedge-shaped plates 5, so the horizontal force is transmitted to the wedge-shaped plates 5 again. Since the wedge-shaped plates 5 are fixed to the workbench 3 by screws and flat keys, the lower anvil 2 is mechanically fixed and will not slip, thus achieving the locking of the lower anvil 2 and preventing horizontal displacement.

[0034] As Figure 5 shown, a method for interlocking logic control of an anti-slip device for forging tooling starts with "Command - Driving Cylinder MOVE". After the driving cylinder acts, first judge "Slider NOT UP END" (the slider has not reached the top dead center); if it is not satisfied (i.e., the slider has reached the top dead center), directly enter the "Slider UP END" (the slider has reached the top dead center) state; if it is satisfied (the slider has not reached the top dead center), then execute the "Slider UP" (the slider rises) action until reaching the "Slider UP END" (the slider has reached the top dead center) state;

[0035] After reaching "Slider UP END", there are two paths: one is to execute "Hook Plate OPEN" (the hook plate opens); the other is to execute "Hook Plate CLOSE" (the hook plate closes), and then perform "Hook Plate CHECK" (the hook plate check);

[0036] After "Hook Plate OPEN", execute "Driving Cylinder MOVE" (the driving cylinder moves). After the movement is completed, judge "Driving Cylinder NOT END" (the driving cylinder has not reached the target position); if it is not satisfied (i.e., the driving cylinder has reached the target position), enter "Driving Cylinder END" (the driving cylinder has reached the target position); if it is satisfied (has not reached), execute "Driving Cylinder CHECK" (the driving cylinder check) until reaching "Driving Cylinder END";

[0037] After reaching "Driving Cylinder END", execute "Driving Cylinder MOVE END" (the driving cylinder movement ends), then "Hook Plate CLOSE" (the hook plate closes), then execute "Slider UP AND DOWN" (the slider rises and falls). After "Slider UP AND DOWN" is completed, "Hook Plate OPEN" (the hook plate opens), and finally perform "Hook Plate CHECK" (the hook plate check). Thus, a working cycle logic is completed. The above-mentioned slider is the connecting sleeve 12. Through the actions of the driving cylinder 9, the connecting sleeve 12, and the hook plate 7, logical interlocking is achieved, which can effectively reduce the damage of the equipment caused by action interference.

[0038] The above is only for understanding the method and core idea of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the rights of the present invention.

Claims

1. A hydraulic press forging tool anti-slip device, comprising an upper anvil, a lower anvil and a hydraulic press for forging, characterized in that: The lower anvil is placed on the workbench of the hydraulic press, and wedge-shaped surfaces are formed on both sides of the lower part. The wedge-shaped surfaces are matched with wedge plates, and the wedge plates are screwed to the workbench. Slots are formed on both sides of the lower anvil, and hook plates that can move in a circular arc are arranged in the slots to limit the movement of the lower anvil along the length direction of the wedge plate. An actuator for driving the hook plate is arranged on the workbench.

2. The anti-slip device for hydraulic press forging tooling according to claim 1, characterized in that: The actuator includes a mounting seat, a driving cylinder, a linkage rod, an axle pin and a connecting sleeve. The mounting seat is fixed to the inside of the workbench, the driving cylinder is fixed on the mounting seat, the lower part of the hook plate is hinged to the outer side of the wedge plate, one end of the linkage rod is hinged to the hook plate, and the other end is hinged to the connecting sleeve, and the lower end of the connecting sleeve is fixed to the piston rod of the driving cylinder.

3. The anti-slip device for hydraulic press forging tooling according to claim 2, characterized in that: The outside of the connecting sleeve is sleeved with a protective sleeve, and the protective sleeve is fixed on the mounting seat.

4. The anti-slip device for hydraulic press forging tooling according to claim 1, characterized in that: The workbench is also provided with a protective cover for protecting the anti-slip device.

5. The anti-slip device for hydraulic press forging tooling according to claim 1, characterized in that: The cross section of the wedge-shaped plate is a right-angle trapezoid, and a notch is provided on the wedge-shaped plate to match the hook plate.

6. A method for controlling the interlocking logic of a forging tool anti-slip device, characterized in that: Starting from "Command - Drive Cylinder MOVE", after the drive cylinder moves, first judge "Slider NOT UP END" (slider has not reached the top dead center); if it is not satisfied (that is, the slider is already at the top dead center), directly enter the "Slider UP END" (slider reaches the top dead center) state; if it is satisfied (the slider has not reached the top dead center), execute the "Slider UP" (slider rises) action until it reaches the "Slider UP END" (slider reaches the top dead center) state; After reaching "Slider UP END", there are two paths: one is to execute "Hook Board OPEN" (hook board open); the other is to execute "Hook Board CLOSE" (hook board close), and then perform "hook board CHECK" (hook board check); When the "hook plate is OPEN", execute "drive cylinder MOVE" (drive cylinder movement), and after the movement is completed, judge "drive cylinder NOT END" (drive cylinder has not reached the target position); if it is not satisfied (that is, the drive cylinder has reached the target position), enter "drive cylinder END" (drive cylinder reaches the target position); if it is satisfied (not reached), execute "drive cylinder CHECK" (drive cylinder check) until reaching "drive cylinder END"; After reaching "drive cylinder END", execute "drive cylinder MOVE END", then "hook plate CLOSE", and then execute "slider UP AND DOWN". After "slider UP AND DOWN" is completed, "hook plate OPEN" and finally "hook plate CHECK". At this point, a working cycle logic is completed.

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