CN115229111A - A universal die-opening device and die-opening method of a hot die forging press - Google Patents

Abstract

The invention discloses a universal die-opening device and a die-opening method for a hot die forging press, and relates to the technical field of forging machines. The upper end of the lever is equipped with a ball head at the lower end, and the upper end is screwed with the saw tooth nut and protrudes out of the saw tooth outside the die height adjustment lever. The cylinder group, the piston is protruding and supports the ball seat, the hydraulic cylinder group is connected with the overload pump that controls the expansion and contraction of the piston, the invention perfectly solves the problem that the hot die forging press needs to cut the die when the die is dead. Trouble, greatly save the cost of mold, but also greatly improve work efficiency.

Description

Universal die-opening device and die-opening method of hot die forging press

technical field

The invention relates to the technical field of forging machines, in particular to a universal die opener and a die opening method for a hot die forging press.

Background technique

Hot die forging presses are a series of products produced by introducing the world's advanced technology, and are widely used in automobiles, tractors, internal combustion engines, ships, aviation, mining machinery, petroleum machinery or hardware tools and other manufacturing industries. Hot die forging presses include plate bending machines, shearing machines, punching machines, presses, hydraulic presses, hydraulic presses, bending machines, etc. The metal blank passes through two relatively rotating fan-shaped dies to produce plastic deformation to form the forging method of the workpiece, It is a special form of forming rolling (longitudinal rolling), so it is widely used in modern forging production and is an indispensable high-precision forging equipment for modern forging production.

The Chinese invention patent with the patent publication number CN111570702A discloses a new type of hot die forging press. Its working principle is that the main motor drives the flywheel to rotate through the V-belt, the flywheel drives the intermediate pinion on the transmission shaft to rotate through the clutch, and drives the intermediate pinion to rotate. The middle gear on the shaft rotates, and the middle gear drives the pinion to rotate through the middle shaft, thereby driving the deflection shaft bull gear to rotate, and the deflection shaft drives the connecting rod and makes the slider reciprocate up and down to realize the punching action.

When the eccentric shaft works near the bottom dead center and the slider works near the bottom dead center, due to various practical reasons, the eccentric shaft cannot cross the bottom dead center, so that the upper die, the stamping workpiece, and the lower die are blocked, and the machine cannot be normal operation. Therefore, in the prior art, when the hot die forging press is dead, it is usually maintained by cutting the die, which is costly and affects the work efficiency.

At present, there is no hot die forging press on the market that can solve the problem of die rejection. Based on this, this case is filed.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the problems in the prior art, and to propose a universal die-opener and a die-opening method for a hot-die forging press, which can solve the problem of die of the hot-die forging press and avoid cutting the die.

In order to achieve the above purpose, the present invention proposes a universal die opener for a hot die forging press, which includes a body of the hot die forging press and a slider set on the body which is driven by an eccentric shaft and a connecting rod to reciprocate and lift. , the slider is provided with an upper mold, the body is provided with a lower mold corresponding to the upper mold, and the connecting end of the connecting rod and the slider is set through the eccentric bushing. A lever; the die height adjustment lever is rotated with a ball head at the lower end, the upper end is screwed with a saw tooth nut and protrudes out of the saw tooth outside the die height adjustment lever, the ball head is installed in the ball seat, the ball seat A hydraulic cylinder group with a piston is arranged below, the piston is in a protruding shape and supports the ball seat, and the hydraulic cylinder group is connected with an overload pump that controls the expansion and contraction of the piston.

Preferably, an upper ejection block is fixedly connected to the fuselage, the top of the saw teeth is disassembled and provided with a lower ejection block, and a hydraulic jack is placed on the lower ejection block, and the hydraulic jack and the ejection upper Between the cushion blocks, there are ejection cushion rods whose length is equal to the distance between them.

Preferably, the die height adjustment lever is connected to the eccentric bushing through a flat key, the lower end of the connecting rod is fixedly connected to the slider via a connecting rod pin, the upper end of the connecting rod is connected to the eccentric shaft, and the eccentric bushing is installed on the the lower end of the connecting rod.

Preferably, the upper ejection block, the hydraulic jack, the lower ejection block and the ejection cushion rod are arranged concentrically with the saw teeth.

Preferably, the ball seat is fixed in the worm wheel seat, and the worm wheel seat is provided with a worm wheel and worm group for controlling the rotation of the saw teeth, and the worm wheel and worm group is drivingly connected with the die height adjustment motor.

In order to achieve the above purpose, the present invention also proposes a die-opening method for a hot die forging press, comprising the following steps:

1. First stop the operation, unload the overload pump, shrink the piston of the hydraulic cylinder below the saw teeth, and make the saw teeth have a falling space;

2. Place the lower block and hydraulic jack on the top of the saw teeth;

3. Place a suitable length of ejector pad between the hydraulic jack and the upper ejector block fixed to the fuselage;

4. Pressurize the hydraulic jack, so that the lower block is pushed out and the serration is moved downward;

5. Turn on the machine and run in reverse.

Preferably, the piston, the saw teeth, the lower ejection block, the hydraulic jack, the ejection cushion rod, and the upper ejection block are located in a linear position.

Beneficial effects of the present invention:

1. In the present invention, a hydraulic cylinder controlled by the overload pump to control the expansion and contraction of the piston is arranged under the ball seat of the saw tooth ball head. When the overload pump enters the oil pressure, the piston will move upward; when the overload pump releases pressure When the oil is drained, the piston will move downward, so that when the mold is dead, the saw teeth have a falling space, which is convenient for adjusting the upward movement of the slider;

2. Use the hydraulic jack to move the saw teeth downward, so that there is a gap between the upper and lower molds and the stamping workpiece, so as to release the mold, so that the machine can resume normal operation and avoid cutting the mold.

3. The present invention perfectly solves the trouble that the hot die forging press needs to cut the die when the die is dead, greatly saves the cost of the die, and greatly improves the work efficiency.

The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is the structural representation of the universal die opener of the hot die forging press of the present invention;

In the picture: 1-body, 2-eccentric shaft, 3-connecting rod, 4-slider, 5-upper die, 6-lower die, 7-eccentric bushing, 8-saw tooth nut, 9-die height Adjusting lever, 10-saw teeth, 11-ball seat, 12-piston, 13-hydraulic cylinder, 14-load pump, 15-extruding upper block, 16-extruding lower block, 17-hydraulic jack, 18 - Ejector rod, 19- connecting rod pin, 20- worm wheel seat.

Detailed ways

Referring to FIG. 1, the universal die opener of the hot die forging press of the present invention includes a body 1 of the hot die forging press and a slider 4 arranged on the body 1 to be driven by an eccentric shaft 2 and a connecting rod 3 to reciprocate up and down , the drive structure of the eccentric shaft 2 and the connecting rod 3 is the prior art, which is driven by the main motor, flywheel, clutch, transmission shaft and intermediate shaft, etc. The slider 4 is provided with an upper worktable, and the upper die 5 is fixed On the upper worktable, the body 1 is provided with a lower die 6 corresponding to the upper die 5, the body 1 is provided with a lower workbench, the lower die 6 is fixed on the lower workbench, and the stamping workpiece is placed on the lower die 6 on the upper die 5 for punching; the connecting end of the connecting rod 3 and the slider 4 is provided with a die height adjusting lever 9 with a saw tooth nut 8 at the end through the eccentric bushing 7; the die height adjusting lever 9 is on the The lower end is a ball head, and the upper end is screwed with the saw tooth nut 8 and extends out of the saw tooth 10 outside the die height adjustment lever 9. The ball head is installed in the ball seat 11, and a piston is arranged below the ball seat 11. The hydraulic cylinder 13 of 12, the piston 12 is protruding and supports the ball seat 11, and the hydraulic cylinder 13 is connected with the overload pump 14 that controls the expansion and contraction of the piston 12 thereof. When the overload pump 14 is pumped with oil pressure, the piston 12 will move upward, and when the overload pump 14 is depressurized and oil is discharged, the piston 12 will move downward.

Specifically, an upper ejector block 15 is fixedly connected to the fuselage 1, and the upper ejector block 15 is locked with the top of the fuselage by screws and cannot move; the top of the saw teeth 10 is provided with an ejector lower block Pad 16, the lower pad 16 is detachable, and is placed on the top of the saw tooth 10 during use, positioned by the hole on the slider 4, and a hydraulic jack 17 is placed on the lower pad 16. The hydraulic jack Between 17 and the upper ejection block 16, there is an ejector rod 18 whose length is equal to the distance between the two. Both ends of the ejection pad rod 18 extend to the hydraulic jack 17 and the upper ejection pad 16 respectively.

Specifically, the die height adjustment lever 9 is connected with the eccentric bushing 7 through a flat key, the lower end of the connecting rod 3 is fixedly connected with the slider 4 through the connecting rod pin 19, and the upper end of the connecting rod 3 is connected with the eccentric shaft 2, The eccentric bushing 7 is installed on the lower end of the connecting rod 3 . The upper ejection block 15 , the hydraulic jack 17 , the lower ejection block 16 , the ejection cushion rod 18 and the piston 12 are arranged coaxially with the teeth 10 .

Specifically, the ball seat 11 is fixed in the worm wheel seat 20, and the worm wheel seat 20 is provided with a worm wheel and worm group for controlling the rotation of the saw teeth 10, and the worm wheel and worm group is drivingly connected with the die height adjustment motor. The rotation of the die height adjusting motor drives the worm gear and worm group to rotate through gear transmission, and the worm gear of the worm gear and worm group drives the saw tooth 10 to rotate. Drive the mold height adjustment lever 9 to move up and down, the up and down movement of the mold height adjustment lever 9 drives the eccentric bushing 7 to rotate through the key connection, and the rotation of the eccentric bushing 7 drives the bottom surface of the slider 4 relative to the fixed height of the center of the connecting rod 3. To achieve the purpose of adjusting the mold height.

The die-opening method of the hot die forging press of the present invention, which relies on the above-mentioned universal die-opener to complete, comprises the following steps:

1. When the upper and lower molds and the stamping workpiece are dead, first stop the operation, and unload the load pump 14 to shrink and descend the piston 12 of the hydraulic cylinder 13 under the saw teeth 10, so that the saw teeth 10 have a descending space;

2. Then place the lower ejection block 16 in the reserved hole of the slider 4 and at the top of the serration 10, place the hydraulic jack 17 on the top of the lower ejection block 16, from the bottom to the upper piston 12 and serration 10 , Eject the lower cushion block 16, the hydraulic jack 17, the ejection cushion rod 18, and the ejection upper cushion block 15 in a straight line position;

3. Place an ejection pad rod 18 of a suitable length between the hydraulic jack 17 and the upper ejection pad 15 fixed to the fuselage 1;

4. Pressurized hydraulic jack 17, through the reaction of pushing out the cushion rod 18 and pushing out the upper cushion block 15, so that the lower cushion block 16 is pushed out and the saw tooth 10 is moved downward, and the optional saw tooth nut 8 is driven downward. Actuated, thereby driving the mold height adjustment lever 9 to rotate, driving the eccentric bushing 7 to rotate clockwise, so that the connecting rod pin 19 moves upward. Since the connecting rod pin 19 and the slider 4 are fixedly connected, Therefore, the slider 4 also moves upward, so that there is a gap between the upper and lower dies and the stamping workpiece;

5. Turn on the machine and operate the machine for reverse operation, so as to release the mold and allow the machine to operate normally again.

The above-mentioned embodiments are illustrative of the present invention, not limitations of the present invention, and any scheme after simple transformation of the present invention belongs to the protection scope of the present invention.

Claims (7)

1. A universal die opener for a hot die forging press, comprising a body (1) of the hot die forging press and a body (1) provided on the body (1) driven by an eccentric shaft (2) and a connecting rod (3) A sliding block (4) for reciprocating lifting, an upper mold (5) is provided on the sliding block (4), and a lower mold (6) corresponding to the upper mold (5) is provided on the body (1), characterized in that : The connecting end of the connecting rod (3) and the slider (4) is provided with a die height adjusting lever (9) with a saw tooth nut (8) at the end via the eccentric bushing (7); the die height adjusting lever (9) The upper rotation is provided with a ball head at the lower end, the upper end is screwed with the saw tooth nut (8) and extends out of the saw tooth (10) outside the die height adjustment lever (9), and the ball head is installed on the ball seat (11). ), a hydraulic cylinder (13) with a piston (12) is arranged below the ball seat (11), the piston (12) is protruding and supports the ball seat (11), the hydraulic cylinder (13) ) is connected to the overload pump (14) which controls the expansion and contraction of its piston (12). 2. The universal die opener of a hot die forging press according to claim 1, characterized in that: the body (1) is fixedly connected with an upper ejector block (15), and the saw teeth The top disassembly of (10) is provided with a lower ejection block (16), and a hydraulic jack (17) is placed on the lower ejection block (16), and the hydraulic jack (17) and the upper ejection block (16) are separated from each other. There is an ejector rod (18) with a length equal to the distance between the two. 3. The universal die opener of a hot die forging press according to claim 1 or 2, wherein the die height adjustment lever (9) is connected with the eccentric shaft sleeve (7) through a flat key, so that the The lower end of the connecting rod (3) is fixedly connected to the slider (4) through the connecting rod pin (19), the upper end of the connecting rod (3) is connected to the eccentric shaft (2), and the eccentric shaft sleeve (7) is installed on the connecting rod (3). the lower end of the rod (3). 4. The universal die opener of a hot die forging press according to claim 2, characterized in that: the upper block (15) for ejecting, the hydraulic jack (17), and the lower block (16) for ejecting ), the ejector rod (18) and the piston (12) are arranged coaxially with the saw teeth (10). 5 . The universal die opener of a hot die forging press according to claim 1 , wherein the ball seat ( 11 ) is fixed in the worm wheel seat ( 20 ), and the worm wheel seat ( 20 ) A worm gear and worm group for controlling the rotation of the saw teeth (10) is provided, and the worm gear and worm group is drivingly connected with a die height adjustment motor. 6. a die-opening method of a hot die forging press, is characterized in that, comprises the following steps: 1. First stop the operation, unload the load through the load pump, shrink the piston of the hydraulic cylinder below the saw teeth, and make the saw teeth have a descending space; 2. Place the lower block and hydraulic jack on the top of the saw teeth; 3. Place a suitable length of ejector pad between the hydraulic jack and the upper ejector block fixed to the fuselage; 4. Pressurize the hydraulic jack, so that the lower block is pushed out and the serration is moved downward; 5. Turn on the machine and run in reverse. 7. A die-opening method for a hot die forging press, characterized in that the piston, the saw teeth, the lower block for ejection, the hydraulic jack, the ejector rod, and the upper block for ejection are located in a linear position.

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