Multi-machine linkage type press machine

Abstract

The invention discloses a multi-machine linkage type press machine which comprises a press machine frame, a press machine base, a press machine base, a press machine driving device, a press machine driving device and a press machine driving device. The protective door is slidably arranged on the press machine rack, and a plurality of connecting pieces are arranged at the bottom of the protective door; the buffer unit comprises a plurality of hydraulic cylinders matched with the connecting pieces, each hydraulic cylinder comprises a cylinder body and a piston moving in the cylinder body in a sealed mode, and the piston makes contact with the workbench through a first rod body; the buffering unit is arranged on the press machine rack. In the cylinder body, the piston can automatically adjust the liquid outlet amount of the hydraulic cylinder according to the matched punching strength through the matching of the adjusting plate, the control spring and the abutting rod, so that the buffering force and the impact force are dynamically balanced, and the vibration amplitude of the protective door is reduced; the stirring unit forcibly stirs oil liquid through linkage of a piston and an impeller, internal heat homogenization is achieved, automatic liquid changing when the temperature exceeds the limit is achieved, the labor cost is reduced, and the generation efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of presses, especially multi-machine linkage presses. Background Art

[0002] In traditional press equipment, the protective doors of multi-machine linkage presses often jump frequently due to the vibration transmitted by the workbench during the stamping process, resulting in wear of the connection structure, seal failure and even deformation. Even when the protective door jumps too much, the workpieces on the press pop out and cause harm to people. The existing protective doors are generally horizontally movably arranged on the workbench, resulting in the inability to fully display the workbench of the multi-station multi-machine linkage press; Therefore, a buffer device is urgently needed between the protective door and the workbench to solve the above problems. In addition, the heat generated by piston friction and liquid compression during the long-term operation of the hydraulic buffer unit is likely to cause oil deterioration, and the traditional heat dissipation method has low efficiency and requires frequent shutdowns to replace the oil, seriously affecting production efficiency. Summary of the Invention

[0003] The present invention aims at the deficiencies in the prior art and provides a multi-machine linkage press To solve the above technical problems, the present invention is solved by the following technical solutions: The multi-machine linkage press includes a press frame, including a workbench fixedly arranged therein; a protective door, slidably arranged on the press frame, and several connecting pieces are arranged at the bottom of the protective door; and a buffer unit, including several hydraulic cylinders matching the connecting pieces, including a cylinder body and a piston sealingly moving in the cylinder body, and the piston contacts the workbench through a first rod body; the buffer unit is arranged on the press frame. When the workbench is impacted, the reaction force drives the first rod body and the piston to move, buffering the elastic force acting on the protective door.

[0004] In the above solution, preferably, several sliding units symmetrically arranged on the press frame are further included. The sliding unit includes a track and a first slider, and the protective door slides between the press frames through the first slider; There are cavities at the two sides of the workbench matching the tracks, the buffer unit is arranged in the cavities and fixed at the end of the track, and the first rod body contacts the bottom of the cavity.

[0005] In the above solution, preferably, a control oil tank is arranged on the side of the cylinder body, the control oil tank is connected to the cylinder body in a through manner, and several first inlet one-way valves and several first outlet one-way valves are arranged between the cylinder body and the control oil tank. When the piston moves upward, the liquid in the cylinder body enters the control oil tank through the first outlet one-way valve.

[0006] In the above solution, preferably, an adjusting unit is provided in the cylinder block. The adjusting unit includes an adjusting plate that slides in the cylinder block. The adjusting plate is connected to the top of the cylinder block through a control spring. A counteracting rod that matches the adjusting plate is provided on the piston rod; The first liquid inlet check valve is arranged below the first liquid outlet check valve. The adjusting plate is movably connected to the outside of the first liquid inlet check valve. The adjusting plate seals with the first liquid outlet check valve through displacement to control the liquid outflow speed.

[0007] In the above solution, preferably, a stirring unit is further included, which includes a connecting rod, a connecting pipe, a first spring, and a stirring impeller. The connecting rod is connected to the center of the piston. The connecting rod is slidably arranged in the connecting pipe. The first spring is arranged between the connecting pipe and the connecting rod. The stirring impeller is rotatably arranged on the connecting rod. When the piston moves to drive the stirring impeller to move, the stirring impeller rotates in the cylinder block.

[0008] In the above solution, preferably, the control fuel tank includes an electrically controlled liquid inlet valve and an electrically controlled liquid outlet valve for replacing the liquid. After the electrically controlled liquid inlet valve and the electrically controlled liquid outlet valve are opened, when the piston moves, the electrically controlled liquid inlet valve and the electrically controlled liquid outlet valve exchange the liquid in the cylinder block with the outside.

[0009] In the above solution, preferably, a temperature measuring unit is included. The temperature measuring unit includes a sliding rheostat, a temperature measuring element, and a heat conducting rod. The sliding rheostat is electrically connected to the electrically controlled liquid inlet valve and the electrically controlled liquid outlet valve. The connecting pipe passes through the cylinder block and is connected to the temperature measuring element through the heat conducting rod. The temperature measuring element is connected to the variable resistance slider of the sliding rheostat; When the temperature of the temperature measuring element rises, the temperature measuring element drives the variable resistance slider to move so that the electrically controlled liquid inlet valve and the electrically controlled liquid outlet valve are opened.

[0010] In the above solution, preferably, the temperature measuring element is a double - helix metal sheet. When the temperature of the liquid in the cylinder block rises, the double - helix metal sheet expands to drive the variable resistance slider to move upward.

[0011] In the above solution, preferably, a plurality of through holes for draining liquid are provided on the connecting pipe.

[0012] The beneficial effects of the present invention are as follows: The protective door slides vertically between the columns, saving a large amount of lateral space and facilitating the collaborative operation of workstations during multi - machine linkage; In the cylinder block, through the cooperation of the piston, the adjusting plate, the control spring, and the counteracting rod, the liquid output of the hydraulic cylinder can be automatically adjusted according to the matching punching force, so that the buffer force and the impact force are dynamically balanced, and the vibration amplitude of the protective door is reduced; The stirring unit forcibly stirs the oil through the piston-linkage impeller to achieve uniform internal heat. Further, by setting the temperature measurement unit to electronically control the inlet / outlet one-way valves, automatic liquid replacement is realized when the temperature exceeds the limit, reducing labor costs and improving production efficiency. Description of the Drawings

[0013] Figure 1 This is a three-dimensional view of the structure of the present invention.

[0014] Figure 2 This is a top view of the present invention.

[0015] Figure 3 It is Figure 2 The sectional view taken along the line A-A of

[0016] Figure 4 It is Figure 3 The enlarged view at position B of

[0017] Figure 5 This is a three-dimensional schematic diagram of the column and the workbench of the present invention.

[0018] Figure 6 This is a schematic diagram of the structure of the protective door of the present invention. Detailed Description of the Preferred Embodiments

[0019] The following further describes the present invention in detail in conjunction with the drawings and the specific embodiments: Refer to Figures 1 - 6 , the multi-machine linkage type press, including the press frame 1. Among them, the press frame 1 includes the workbench 2. Among them, the workbench 2 is connected to the punch part of the press through four columns. Among them, the workbench 2 occupies the space between the columns, that is, the operation panels are arranged between the columns, which is convenient for multi-station operation.

[0020] The press further includes a protective door 3. In order to facilitate various operations on the workbench 2, the protective door 3 is vertically slidably connected to the press frame 1, which can save space. Specifically, a cross beam is provided on the press frame 1, and a winch is provided between the cross beam and the protective door 3 to control the position of the protective door 3.

[0021] In order to facilitate the sliding of the protective door 3, two sets of sliding units are symmetrically arranged on the press frame. Specifically, the sliding units are oppositely arranged on the columns. The sliding unit includes a track 8 and a first slider 9. The protective door 3 is connected between the two first sliders 9 to realize sliding between the press frames 1.

[0022] At the same time, a hollow cavity 10 is provided below the track 8. The cavity 10 is arranged opposite to the track 8. At the same time, a groove is provided on the workbench 2. The protective door 3 can be embedded in the groove. A buffer pad made of flexible material is placed at the bottom of the groove to slightly absorb vibration.

[0023] Further, a buffer unit is provided between the workbench 2 and the protective door 3. The buffer unit includes a hydraulic cylinder. The hydraulic rod includes a cylinder body 5, a piston 6 and a first rod body 7. Specifically, the cylinder body 5 is fixedly connected to the bottom of the track 8. The piston 6 is slidably sealed in the rod body. The first rod body 7 is connected to one end of the piston 6. The first rod body 7 abuts against the bottom of the cavity 10 of the workbench 2. When the workbench 2 is impacted, the vibration is transmitted to the cylinder body 5 through the first rod body 7 to buffer the force on the protective door 3, so that it will not jump.

[0024] At the same time, when the piston 6 in the cylinder body 5 runs, in order to place the liquid in the cylinder body 5, a control oil tank 11 is provided outside the rod body. The control oil tank 11 and the cylinder body 5 are communicated. Specifically, a plurality of first liquid inlet one-way valves 12 and first liquid outlet one-way valves 13 are provided between the two. In this embodiment, the first liquid inlet one-way valve 12 is arranged below the first liquid outlet one-way valve 13.

[0025] Since the impact force of the punch will change according to different molds, the impact strength of the punch causes different vibrations between the protective door 3 and the workbench 2. At the same time, too large a buffer force causes the first rod body 7 to directly act on the cylinder body 5, further causing vibration. Too small a buffer force causes the first rod body 7 to be unable to slide in the cylinder body 5, resulting in vibration still existing between the cylinder body 5 and the protective door 3.

[0026] For this reason, an adjusting unit is provided in the cylinder body 5. The adjusting unit includes an adjusting plate 14. The adjusting plate 14 is arranged to match the first liquid outlet one-way valve 13. By moving the position of the adjusting plate 14, different numbers of the first liquid outlet one-way valves 13 are covered, so as to realize liquid outlet at different pressures to make the buffer force adapt to the punching force of the punch pressing down.

[0027] Further, the adjusting plate 14 is connected to the top of the cylinder body 5 through a control spring 15. A counteracting rod 16 matching the adjusting plate 14 is arranged on the piston 6 rod. When the piston 6 moves towards the top of the cylinder body 5, the counteracting rod 16 can contact the adjusting plate 14, and the counteracting rod 16 overcomes the control spring 15 to drive the adjusting plate 14 to move to seal different numbers of the first liquid outlet one-way valves 13, so as to adapt to different forces applied.

[0028] Specifically, when the punch part works, different impact forces result in different forces acting on the workbench 2, that is, different forces rebounding on the first rod body 7. Therefore, when the rebounding force is greater, the instantaneous impact force of the piston 6 is greater, that is, the moving distance of the adjusting plate 14 is greater, and more first liquid outlet one-way valves 13 are exposed inside the cylinder body 5 for liquid exchange.

[0029] At the same time, due to the piston 6 undergoing multiple reciprocating motions, a large amount of heat will be generated due to the continuous friction between the piston 6 and the inner wall of the cylinder block 5, resulting in an increase in the liquid temperature and making it impossible to effectively buffer. Therefore, a stirring unit is provided in the cylinder block 5 to mix the liquid on both sides of the piston 6 with the internal liquid to prevent local overheating problems.

[0030] The stirring unit includes a connecting rod 17, a connecting pipe 18, a first spring 19, and a stirring impeller 20. The connecting rod 17 is connected to the center of the piston 6. The connecting rod 17 is slidably arranged in the connecting pipe 18. The connecting pipe 18 is arranged at the center of the top of the cylinder block 5. The first spring 19 is arranged between the connecting pipe 18 and the connecting rod 17. A number of through holes 26 are arranged on the outer side of the connecting pipe 18 to prevent the inside of the connecting pipe 18 from being sealed. At the same time, the stirring impeller 20 is rotatably arranged at the bottom of the connecting rod 17. When the stirring impeller 20 moves in the liquid, it can rotate, thereby realizing the stirring of the liquid in the cylinder block 5. Under the action of the first spring 19 of the piston 6, it will also reset.

[0031] Furthermore, when the temperature of the liquid in the cylinder block 5 is too high, it needs to be further replaced. In order not to affect the normal buffering of the normal working buffer unit, a temperature measuring unit and a device for replacing the liquid after temperature measurement are provided in cooperation with the buffer unit.

[0032] Specifically, the temperature measuring unit includes a sliding rheostat 23, a temperature measuring element 24, and a heat conducting rod 25. A box body 28 is arranged at the top of the cylinder block 5. The sliding rheostat 23 is arranged in the box body 28 vertically. The sliding rheostat 23 includes a variable resistance slider 27. The temperature measuring element 24 is a double spiral metal sheet. The connecting pipe 18 extends outward from the cylinder block 5 and is connected to it through the heat conducting rod 25. The heat conducting rod 25 is made of a metal material that can transfer heat and is connected to the temperature measuring element 24. When the temperature in the cylinder block 5 becomes higher, the heat therein is transferred to the temperature measuring element 24 through the connecting pipe 18 and the heat conducting rod 25. According to the characteristics of the double spiral metal sheet, the higher the temperature, the greater its degree of expansion.

[0033] Two connecting pieces 294 are welded to both sides of the bottom of the protective door 3. When the protective door 3 moves downward to cooperate with the buffer unit, a magnetic connection is formed between the connecting piece 294 and the box body 28, so that when the protective door 3 is vibrated, the buffer unit can buffer it, thereby extending the service life of the protective door 3.

[0034] According to the principle of the temperature measuring component 24 described above, one end of the temperature measuring component 24 is connected to the variable resistance slider 27. When the temperature of the liquid in the cylinder block 5 is higher, the variable resistance slider 27 is located above the sliding rheostat, and the current passing through the sliding rheostat 23 is reduced by adjustment, thereby realizing the control of liquid replacement.

[0035] Specifically, the liquid replacement is completed by controlling the fuel tank 11. Further, an electronically controlled inlet valve 21 and an electronically controlled outlet valve 22 are provided on the control fuel tank 11, and they are started and stopped in an electronically controlled manner, that is, the electronically controlled inlet valve 21 and the electronically controlled outlet valve 22 are electrically connected to the sliding rheostat 23. When the resistance value of the sliding rheostat 23 connected to the circuit becomes smaller, that is, the current of the electronically controlled inlet valve 21 and the electronically controlled outlet valve 22 in the circuit becomes larger, that is, the electronically controlled inlet valve 21 and the electronically controlled outlet valve 22 are started. Therefore, when the piston 6 moves further, the overheated liquid will be discharged, and new liquid will be sucked back into the control fuel tank 11 for circulation until the liquid cools down, and the temperature of the control component is reduced. The variable resistance slider 27 can move to realize the re - closing of the electronically controlled inlet valve 21 and the electronically controlled outlet valve 22.

[0036] Working principle: When the punch is performing a stamping action, the vibration generated by the workbench 2 is transmitted to the protective door 3 structure through four columns. That is, under the action of the buffer unit, the workbench 2 is subjected to a reduced rebound force acting on the protective door 3. That is, the piston 6 is pushed by the impact force transmitted by the first rod body 7, so that the liquid in the cylinder block 5 flows through the first liquid outlet check valve 13 to the control fuel tank 11, forming a buffering effect. At the same time, the greater the impact force, the greater the instantaneous displacement of the piston 6. The abutting rod 16 on the first rod body 7 pushes the adjusting plate 14 to compress the control spring 15, so that the adjusting plate 14 moves upward and exposes more liquid outlet valves, expanding the cross - sectional area of liquid flow to reduce the damping coefficient, forming a dynamic balance between the impact force and the buffering force, and ensuring that the vibration amplitude of the protective door 3 is stabilized within a certain range.

[0037] In this process, the friction heat generated by the reciprocating motion of the piston 6 is evenly dissipated through the stirring unit. The connecting rod 17 moves with the piston 6 and drives the stirring impeller 20 to rotate after being displaced in the water flow, forming turbulence in the liquid to accelerate heat exchange. At the same time, the outer side of the connecting pipe 18 is connected to the sliding rheostat 23 through the temperature conducting member, thereby realizing the control of the control oil tank 11. When the temperature of the liquid exceeds the set threshold, the temperature conducting rod 25 conducts the heat to the double-helix metal sheet, so that it can expand and contract according to the temperature, thereby controlling the rheostat. Slider 27, when the sliding rheostat 23 changes the access current, it can control the opening of the electric control liquid inlet valve 21 and the electric control liquid outlet valve 22, that is, when the temperature rises, the access resistance of the sliding rheostat 23 becomes smaller, and the electric control liquid inlet valve 21 and the electric control liquid outlet valve 22 will start. When the piston 6 continues to run, the liquid in the control oil tank 11 and the new liquid from the outside are also exchanged until the temperature of the liquid in the cylinder body 5 returns to normal. The electric control liquid inlet valve 21 and the electric control liquid outlet valve 22 are closed and used repeatedly to extend the service life of the buffer unit.

[0038] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. Multi-machine linkage type press, characterized in that: including a press frame (1), including a workbench (2) fixedly arranged therein; a protective door (3), slidably arranged on the press frame (1), and a plurality of connecting members (29)(4) are arranged at the bottom of the protective door (3); and a buffer unit, including a plurality of hydraulic cylinders matching the connecting members (29)(4), including a cylinder body (5) and a piston (6) sealingly moving in the cylinder body (5), and the piston (6) contacts the workbench (2) through a first rod body (7); the buffer unit is arranged on the press frame (1), and after the workbench (2) is impacted, the reaction force drives the first rod body (7) and the piston (6) to move, buffering the elastic force acting on the protective door (3).

2. The multi-machine linkage type press according to claim 1, wherein: It further includes a plurality of sliding units symmetrically arranged on the press frame (1), and the sliding units include a track (8) and a first slider (9), and the protective door (3) slides between the press frames (1) through the first slider (9); - cavities (10) are arranged at the two sides of the workbench (2) where the tracks (8) are matched, the buffer unit is arranged in the cavities (10) and fixed at the end of the track (8), and the first rod body (7) contacts the bottom of the cavity (10).

3. The multi-machine linkage type press according to claim 1, characterized in that: A control oil tank (11) is arranged on the side of the cylinder body (5), the control oil tank (11) is connected to the cylinder body (5) in a through manner, and a plurality of first liquid inlet one-way valves (12) and a plurality of first liquid outlet one-way valves (13) are arranged between the cylinder body (5) and the control oil tank (11). When the piston (6) moves upward, the liquid in the cylinder body (5) enters the control oil tank (11) through the first liquid outlet one-way valve (13).

4. The multi-machine linkage type press according to claim 3, characterized in that: An adjusting unit is arranged in the cylinder body (5), and the adjusting unit includes an adjusting plate (14) sliding in the cylinder body (5), the adjusting plate (14) is connected to the top of the cylinder body (5) through a control spring (15), and an abutting rod (16) matching the adjusting plate (14) is arranged on the piston (6) rod; The first liquid inlet one-way valve (12) is arranged below the first liquid outlet one-way valve (13), the adjusting plate (14) is movably connected to the outside of the first liquid inlet one-way valve (12), and the adjusting plate (14) is sealed with the first liquid outlet one-way valve (13) through displacement to control the liquid outflow speed.

5. The multi-machine linkage type press according to claim 4, characterized in that: It further includes a stirring unit, including a connecting rod (17), a connecting pipe (18), a first spring (19) and a stirring impeller (20), the connecting rod (17) is connected to the center of the piston (6), the connecting rod (17) is slidably arranged in the connecting pipe (18), the first spring (19) is arranged between the connecting pipe (18) and the connecting rod (17), the stirring impeller (20) is rotatably arranged on the connecting rod (17), and when the piston (6) runs to drive the stirring impeller (20) to move, the stirring impeller (20) rotates in the cylinder body (5).

6. The multi-machine linkage type press according to claim 5, characterized in that: The control fuel tank (11) includes an electrically controlled liquid inlet valve (21) and an electrically controlled liquid outlet valve (22) for replacing the liquid. After the electrically controlled liquid inlet valve (21) and the electrically controlled liquid outlet valve (22) are opened and the piston (6) moves, the electrically controlled liquid inlet valve (21) and the electrically controlled liquid outlet valve (22) exchange the liquid in the cylinder block (5) with the outside.

7. The multi-machine linkage type press according to claim 6, characterized in that: It includes a temperature measurement unit. The temperature measurement unit includes a sliding rheostat (23), a temperature measuring element (24), and a temperature conducting rod (25). The sliding rheostat (23) is electrically connected to the electrically controlled liquid inlet valve (21) and the electrically controlled liquid outlet valve (22). The connecting pipe (18) passes through the cylinder block (5) and is connected to the temperature measuring element (24) through the temperature conducting rod (25). The temperature measuring element (24) is connected to the variable resistance slider (27) of the sliding rheostat (23); When the temperature of the temperature measuring element (24) rises, the temperature measuring element (24) drives the variable resistance slider (27) to move so that the electrically controlled liquid inlet valve (21) and the electrically controlled liquid outlet valve (22) are opened.

8. The multi-machine linkage type press according to claim 7, characterized in that: The temperature measuring element (24) is a double - helix metal sheet. When the temperature of the liquid in the cylinder block (5) rises, the double - helix metal sheet expands to drive the variable resistance slider (27) to move upward.

9. The multi-machine linkage type press according to claim 7, wherein: A number of through - holes (26) for draining liquid are provided on the connecting pipe (18).

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