Upper air cushion partition control device for pressing machine

Abstract

The utility model provides an upper air cushion partition control device for a press, which belongs to the technical field of die stamping and comprises a frame, an action device, a driving device and a control device, the action device comprises a slider base plate and a plurality of knockout rods, a central slider air bag group is arranged above the slider base plate, and a plurality of knockout rods are arranged above the central slider air bag group. Side sliding block air bag sets are arranged on the two sides of the center sliding block air bag set correspondingly, the working ends of the center sliding block air bag set and the working ends of the side sliding block air bag sets are each provided with an upper top crown in linkage fit with a knockout rod, the center sliding block air bag set forms a working A area air bag set, and the two side sliding block air bag sets jointly form a working B area air bag set. The working area A air bag group and the working area B air bag group are respectively connected with the driving device through pneumatic pipelines, and the driving device is connected with the control device through an electrical circuit. Stress dispersion is achieved through partition air bag control, energy is saved, efficiency is high, the product percent of pass is improved, the device is suitable for complex workpieces, and the flexibility and stability of the device are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of die stamping, in particular to an upper air cushion partition control device for a press. Background Art

[0002] In the field of die stamping technology, the upper air cushion is a key component that provides blank holding force and punching force, and its performance directly affects the production quality and efficiency of stamping parts. The upper air cushion used in traditional presses generally adopts an integral drive structure, which applies a uniform blank holding force and punching force to the entire upper air cushion through a single power source. This overall loading method has significant defects: on the one hand, due to the concentrated stress acting on the local area of ​​the upper crown, long-term operation can easily cause deformation of the upper crown, affecting the accuracy and service life of the equipment; on the other hand, regardless of the process requirements of the stamping part, the upper air cushion works in a fixed mode and cannot adjust the output force according to the actual load, which not only causes energy waste, but also limits the improvement of processing efficiency.

[0003] With the development of hydraulic press technology, some presses have begun to introduce independent drive structures. For example, the Chinese patent application publication number CN110681757A discloses an upper air cushion device for a thin plate stretching hydraulic press, which is installed on the hydraulic press and includes an upper air cushion and a driving mechanism; a groove is provided at the bottom of the upper slider on the hydraulic press, and the upper air cushion is embedded in the groove, and the upper air cushion is in sliding contact with the upper slider on the hydraulic press; the driving mechanism is fixedly installed at the bottom of the groove, and the driving mechanism drives the upper air cushion to move up and down; a plurality of upper stretching rods are evenly provided on the lower surface of the upper air cushion and is fixedly connected to the first upper mold component through the upper stretching rods.

[0004] Although this upper air cushion device can drive the upper air cushion to move independently of the upper slider by setting an upper stretching cylinder, achieving integrated control of the edge pressing and punching functions, in actual use, there are still the following shortcomings: its drive mechanism still adopts an overall synchronous drive mode. Although the upper stretching cylinder can achieve the up and down movement of the upper air cushion, all cylinders move synchronously, and it is impossible to differentiate the loading force in different areas. When faced with complex stamping parts, the overall loading method is difficult to accurately match the local process requirements, there is still a risk of stress concentration, and the energy output cannot be dynamically adjusted according to the load size. When processing workpieces of different specifications, the overall parameters need to be frequently adjusted, which lacks flexibility. Utility Model Content

[0005] The purpose of the utility model is to overcome the shortcomings of the existing upper air cushion device in that the driving mechanism adopts an integral driving mode and has poor flexibility, and to provide an upper air cushion partition control device for a press.

[0006] The utility model is realized through the following technical scheme: an upper air cushion zoning control device for a press machine, comprising a frame, an action device, a driving device and a control device, the action device comprising a slider pad and a plurality of punching rods, the slider pad being mounted on the frame, and the slider pad being provided with openings for mounting the punching rods; a central slider airbag group is provided above the slider pad, and side slider airbag groups are respectively provided on both sides of the central slider airbag group; the central slider airbag group and the side slider airbag group are both mounted on the frame, and the working ends of the central slider airbag group and the side slider airbag group are both provided with An upper crown is provided which cooperates with the beating rod; the central slider airbag group forms the working area A airbag group, and the two side slider airbag groups together form the working area B airbag group; the working area A airbag group and the working area B airbag group are respectively connected to the driving device through pneumatic pipelines, and the driving device is connected to the control device through electrical circuits, and the control device can independently control the operation of the working area A airbag group and the working area B airbag group through the driving device; several of the beating rods are divided into two groups, including an area A beating rod group corresponding to the working area A airbag group, and a area B beating rod group corresponding to the working area B airbag group.

[0007] This device independently controls the airbag groups by partitioning, avoiding stress concentration on the upper crown caused by the existing overall loading method and reducing the risk of deformation. At the same time, the loading area and pressure can be dynamically adjusted according to the process requirements of the stamping parts, significantly improving processing flexibility, thereby reducing ineffective energy consumption and improving equipment energy efficiency.

[0008] A further improvement of the present invention is that the central slider airbag group includes six slider airbags, and the side slider airbag group includes four slider airbags.

[0009] A further improvement of the present invention is that the six slider airbags of the central slider airbag group and the four slider airbags of the side slider airbag group are evenly arranged in two rows.

[0010] A further improvement of the present invention is that the slider airbag includes an air cylinder and an airbag, the air cylinder is mounted on a frame, a support frame is provided on the air cylinder, and the airbag is mounted on the support frame.

[0011] A further improvement of the present invention is that a sealing groove corresponding to the airbag is provided on the frame, and a sealing ring for sealing the airbag is provided in the sealing groove.

[0012] A further improvement of the present utility model is that the driving device includes a driving air source, which is connected to the control device through an electrical circuit, and the driving air source is connected to the working area A airbag group through the pneumatic pipeline of area A, and the driving air source is connected to the working area B airbag group through the pneumatic pipeline of area B; the pneumatic pipelines of area A and area B are both installed with two-position two-way solenoid valves, and the two-position two-way solenoid valves are connected to the control device through an electrical circuit.

[0013] A further improvement of the present invention is that both the pneumatic pipelines in zone A and the pneumatic pipelines in zone B are installed with one-way valves.

[0014] A further improvement of the present invention is that the pneumatic pipelines in zone A and zone B are both connected to mufflers via pneumatic pipelines and solenoid valves.

[0015] A further improvement of the present invention is that the driving device further includes two pressure sensors, and the two pressure sensors are respectively connected to the airbag group in the working area A and the airbag group in the working area B through pneumatic pipelines.

[0016] A further improvement of the present invention is that a buffer block is installed between the slider pad and the upper crown.

[0017] From the above technical solutions, it can be seen that the beneficial effects of the present invention are:

[0018] 1. This device divides the slider airbags into independently working areas A and B. Area A is arranged in the center area of ​​the mold, and area B is arranged on both sides of the mold. Each group of airbags corresponds to an independent top crown and punching rod, realizing precise loading of the blank holder force in different zones, avoiding local stress concentration on the top crown caused by traditional overall loading, reducing the risk of deformation of the top crown, improving pressure uniformity, effectively reducing defects such as edge wrinkling and center rupture of the workpiece, and improving product qualification rate.

[0019] 2. This device realizes dynamic on-demand loading of the airbag group through the coordination of the control device and the drive device. Only area B is used for light loads, and areas A+B are activated for heavy loads, reducing invalid energy consumption. The two-position two-way solenoid valve responds in seconds and the pressure sensor provides closed-loop feedback to dynamically adjust the air pressure, avoiding frequent parameter adjustments and improving processing efficiency. The one-way valve design can maintain the duration of the blank holding force in the event of an air source failure, reducing the scrap rate of workpieces.

[0020] 3. This device supports differentiated blank-holding force control through independent pneumatic pipelines and control devices, which can adapt to the local process requirements of complex stamping parts, significantly enhancing equipment flexibility and engineering practicality; the buffer block design can absorb impact peak force, extend component life, and is compatible with a variety of workpiece specifications from thin plates to medium and thick plates. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for the description. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model.

[0023] Figure 2 It is a structural schematic diagram of a slider airbag according to a specific embodiment of the present utility model.

[0024] Figure 3 It is a principle diagram of a driving device according to a specific embodiment of the present utility model.

[0025] In the figure: 1. Frame; 101. Sealing groove; 102. Sealing ring; 2. Slider pad; 201. Opening; 3. Upper crown; 4. Center slider airbag group; 401. Side slider airbag group; 402. Working area A airbag group; 403. Working area B airbag group; 404. Air cylinder; 405. Airbag; 406. Support frame; 5. Beating rod; 6. Buffer block; 7. Two-position two-way solenoid valve; 701. Solenoid valve; 8. Pressure sensor; 9. Muffler; 10. One-way valve; 11. Driving air source; 1101. Pneumatic pipeline in area A; 1102. Pneumatic pipeline in area B; 41. Slider airbag. DETAILED DESCRIPTION

[0026] In order to make the purpose, features, and advantages of the present invention more obvious and easy to understand, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the present invention, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this patent.

[0027] Now refer to Figure 1-Figure 3, combined with a specific embodiment, it is explained as follows: The utility model is an upper air cushion zoning control device for a press, comprising a frame 1, an action device, a drive device and a control device, the action device comprising a slider pad 2 and a plurality of beating rods 5, the slider pad 2 is mounted on the frame 1 by bolts, and an opening 201 for mounting the beating rod 5 is provided on the slider pad 2; a central slider airbag group 4 is provided above the slider pad 2, and side slider airbag groups 401 are respectively provided on both sides of the central slider airbag group 4; the central slider airbag group 4 and the side slider airbag group 401 are both mounted on the frame 1, and the working ends of the central slider airbag group 4 and the side slider airbag group 401 are An upper crown 3 is provided which cooperates with the beating rod 5; the central slider airbag group 4 forms the working area A airbag group 402, and the two side slider airbag groups 401 together form the working area B airbag group 403; the working area A airbag group 402 and the working area B airbag group 403 are respectively connected to the driving device through pneumatic pipelines, and the driving device is connected to the control device through electrical circuits, and the control device can independently control the operation of the working area A airbag group 402 and the working area B airbag group 403 through the driving device; a number of the beating rods 5 are divided into two groups, including an area A beating rod group corresponding to the working area A airbag group 402, and a area B beating rod group corresponding to the working area B airbag group 403.

[0028] Referring to existing press technology, the control device commands the driver via electrical circuits, independently inputting air pressure into the pneumatic lines of the airbag group 402 in working area A and the airbag group 403 in working area B. When the airbag group in area A or B is inflated, the airbag expands, pushing the upper crown 3 downward, driving the punching rod 5 in the corresponding area through the opening 201 in the slider pad 2, and applying a blanking force to the mold. After stamping is completed, the airbag group maintains or releases air pressure, driving the upper crown 3 and punching rod 5 to reset or eject the workpiece. The two airbag groups can operate independently or in conjunction, for example, with only area B operating under light loads and areas A and B working together under heavy loads.

[0029] This device independently controls the airbag groups by partitioning, avoiding stress concentration on the upper crown 3 caused by the existing overall loading method and reducing the risk of deformation. At the same time, the loading area and pressure can be dynamically adjusted according to the process requirements of the stamping parts, significantly improving processing flexibility, thereby reducing ineffective energy consumption and improving equipment energy efficiency.

[0030] Specifically, refer to Figure 1 The central slider airbag group 4 includes six slider airbags 41 , and the side slider airbag group 401 includes four slider airbags 41 .

[0031] The central slider airbag group 4, consisting of six slider airbags 41, is located in the center of the mold and provides the primary blank-holding force. The side slider airbag groups 401, each consisting of four slider airbags 41, are symmetrically distributed around the edges to supplement the edge-holding force. When the center area requires greater pressure, the six slider airbags 41 in zone A are inflated simultaneously, pushing the center punching rod 5 through the top crown 3 to apply uniform pressure. When the edge area requires increased blank-holding, the four slider airbags 41 in zone B are inflated independently to increase edge pressure.

[0032] The preset ratio of the number of slider airbags 41 in this device can adapt to the center-edge pressure distribution requirements of most stamping parts, avoiding the cost waste caused by blindly increasing the number of slider airbags 41. At the same time, through the zoned air volume distribution, the uniformity of the clamping force is improved, and the problem of wrinkling on the edge of the workpiece or center rupture is reduced.

[0033] Specifically, refer to Figure 1 The six slider airbags 41 of the central slider airbag group 4 and the four slider airbags 41 of each side slider airbag group 401 are evenly arranged in two rows.

[0034] The six central slider airbags 41 are arranged in two rows of three, symmetrically along the mold's centerline. The four side slider airbags 41 are arranged in two rows of two, symmetrically along the mold's edges. During inflation, the slider airbags 41 in the same row expand synchronously, forming a linear pressure zone through the upper crown 3. For example, the two central rows of slider airbags 41 apply uniform longitudinal pressure to the center of the workpiece, while the two side rows of slider airbags 41 apply uniform transverse pressure to the edges.

[0035] The symmetrical and evenly distributed slider airbag 41 layout of this device can ensure a uniform and stable pressure field, and effectively reduces local pressure deviation compared to random arrangement. It is particularly suitable for long strip or symmetrical structure stamping parts, improves the edge pressing accuracy, and reduces the life loss caused by uneven mold wear.

[0036] Specifically, refer to Figure 2 The slider airbag 41 includes an air cylinder 404 and an airbag 405. The air cylinder 404 is installed on the frame 1. A support frame 406 is provided on the air cylinder 404 through bolts. The airbag 405 is installed on the support frame 406 through bolts.

[0037] Referring to existing press technology, the gas reservoir 404 is fixed to the frame 1, serving as a support base for the airbag 405 and storing compressed gas. A support frame 406 connects the gas reservoir 404 and the airbag 405, forming a "rigid support + elastic cushioning" structure. When the airbag 405 is inflated, the gas pressure is transmitted through the support frame 406 to the airbag 405, causing it to expand and push against the upper crown 3. When the pressure is released, the airbag 405 elastically retracts, causing the upper crown 3 to return to its original position.

[0038] Specifically, refer to Figure 1 The frame 1 is provided with a sealing groove 101 corresponding to the airbag 405 , and a sealing ring 102 for sealing the airbag 405 is provided in the sealing groove 101 .

[0039] The sealing groove 101 of the housing 1 is embedded with a sealing ring 102, which fits tightly against the outer wall of the airbag 405 to form an airtight chamber. When the airbag is inflated, the sealing ring 102 deforms to fill the gap and prevent gas leakage. When the pressure is released, the sealing ring 102 elastically recovers to maintain the seal.

[0040] This sealing structure greatly improves the air pressure accuracy of the airbag group, reduces the leakage of the airbag group, ensures the pressure stability of the zone control, and avoids the problems of insufficient pressing force or punching failure caused by air leakage.

[0041] Specifically, refer to Figure 1 A buffer block 6 is installed between the slider pad 2 and the upper crown 3.

[0042] The buffer block 6 is made of an elastic material such as polyurethane and is installed between the slider pad 2 and the upper crown 3. When the ejector rod 5 ejects the workpiece, the upper crown 3 moves upward to impact the slider pad 2, and the buffer block 6 absorbs the impact force through elastic deformation. When the airbag assembly is depressurized, the buffer block 6 rebounds to help the upper crown 3 return to its original position smoothly.

[0043] This buffer structure can effectively reduce the peak impact force, reduce wear of mechanical components, and extend the life of the equipment; at the same time, it can also reduce vibration and noise during the punching process and improve operational stability.

[0044] In one embodiment, referring to Figure 3 The driving device includes a driving air source 11, which is connected to the control device through an electrical circuit, and the driving air source 11 is connected to the working area A airbag group 402 through the area A pneumatic pipeline 1101, and the driving air source 11 is connected to the working area B airbag group 403 through the area B pneumatic pipeline 1102; a two-position two-way solenoid valve 7 is installed on the area A pneumatic pipeline 1101 and the area B pneumatic pipeline 1102, and the two-position two-way solenoid valve 7 is connected to the control device through an electrical circuit.

[0045] The driving air source 11 supplies air to the two airbag groups through the pneumatic pipelines in Zones A and B, respectively. The two-position, two-way solenoid valve 7 opens or closes the air circuit in response to signals from the control device. For example, if the control device determines that Zone B needs to operate independently, only the solenoid valve in Zone B opens, and the driving air source 11 inflates the four airbags through the pipelines in Zone B, while the solenoid valve in Zone A remains closed.

[0046] The precise on-off control of the solenoid valves mentioned above enables a second-level response of the airbag group, improving control efficiency; the independent pipeline design avoids mutual interference between the pressures of the two airbag groups, ensuring the independence and reliability of the zone control.

[0047] Specifically, refer to Figure 3 A one-way valve 10 is installed on the pneumatic pipeline 1101 in area A and the pneumatic pipeline 1102 in area B.

[0048] The one-way valve 10 is installed in the pneumatic line, allowing gas to flow from the driving air source 11 to the airbag assembly while preventing reverse flow. When the airbag assembly is fully inflated, the one-way valve 10 automatically closes, locking the air pressure in the line. If the air source pressure unexpectedly decreases, the one-way valve 10 prevents the airbag assembly gas from flowing back to the source, maintaining the current pressure.

[0049] The anti-backflow feature of the one-way valve 10 can maintain the action time of the blank holding force when the gas source fails, avoiding the scrapping of the stamping parts due to sudden pressure release; at the same time, it reduces gas circulation loss and lowers equipment energy consumption.

[0050] Specifically, refer to Figure 3 The pneumatic pipeline 1101 in area A and the pneumatic pipeline 1102 in area B are both connected to the muffler 9 through the pneumatic pipeline and the solenoid valve 701.

[0051] The muffler 9 is connected to the pneumatic pipeline via a solenoid valve 701. When the airbag assembly depressurizes, the control device opens the solenoid valve 701, allowing the rapidly discharged gas to pass through the porous structure within the muffler 9, reducing airflow noise. For example, when the airbag assembly in zone B depressurizes, the gas enters the muffler 9 through the zone B pipeline and the solenoid valve 701, significantly reducing noise.

[0052] The device can meet industrial noise environmental protection standards through its noise reduction design and improve the workshop working environment; at the same time, it can reduce pipeline vibration caused by gas impact, extend pipeline service life and reduce maintenance frequency.

[0053] Specifically, refer to Figure 3 The driving device also includes two pressure sensors 8, which are respectively connected to the airbag group 402 in the working area A and the airbag group 403 in the working area B through pneumatic pipelines.

[0054] The pressure sensor 8 monitors the air pressure in the airbag groups in zones A and B in real time and feeds this data back to the control device. When the air pressure in a zone falls below a set threshold, the control device automatically commands the air source 11 to replenish air. If the pressure exceeds the threshold, the solenoid valve is commanded to release pressure to maintain the pressure within a safe range.

[0055] Closed-loop pressure monitoring can improve air pressure control accuracy, avoiding airbag rupture caused by overpressure or edge pressing failure caused by underpressure; real-time data feedback supports the system to dynamically adjust loading strategies, improving processing safety and stability.

[0056] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An upper air cushion partition control device for a press, comprising a frame (1), an action device, a drive device and a control device, characterized in that: The action device comprises a slider pad (2) and a punching rod (5), the slider pad (2) being mounted on the machine frame (1), and an opening (201) for mounting the punching rod (5) being provided on the slider pad (2); a central slider airbag group (4) being provided above the slider pad (2), and side slider airbag groups (401) being provided on both sides of the central slider airbag group (4); the central slider airbag group (4) and the side slider airbag group (401) being mounted on the machine frame (1), and the working ends of the central slider airbag group (4) and the side slider airbag group (401) being provided with an upper crown (3) that cooperates with the punching rod (5); the central slider airbag group (4) and the side slider airbag group (401) being provided with a top crown (3) that cooperates with the punching rod (5); The airbag group (4) forms a working area A airbag group (402), and the two side slider airbag groups (401) together form a working area B airbag group (403); the working area A airbag group (402) and the working area B airbag group (403) are respectively connected to the driving device through a pneumatic pipeline, and the driving device is connected to the control device through an electrical circuit, and the control device can independently control the working area A airbag group (402) and the working area B airbag group (403) to work through the driving device; the punching rod (5) is divided into two groups, including an A area punching rod group corresponding to the working area A airbag group (402), and a B area punching rod group corresponding to the working area B airbag group (403).

2. The upper air cushion partition control device for a press according to claim 1, characterized in that: The central slider airbag group (4) includes six slider airbags (41), and the side slider airbag group (401) includes four slider airbags (41).

3. The upper air cushion partition control device for a press according to claim 2, characterized in that: The six slider airbags (41) of the central slider airbag group (4) and the four slider airbags (41) of the side slider airbag group (401) are evenly arranged in two rows.

4. The upper air cushion partition control device for a press according to claim 2, characterized in that: The slider airbag (41) comprises an air cylinder (404) and an airbag (405), wherein the air cylinder (404) is mounted on the frame (1), a support frame (406) is provided on the air cylinder (404), and the airbag (405) is mounted on the support frame (406).

5. The upper air cushion partition control device for a press according to claim 4, characterized in that: The frame (1) is provided with a sealing groove (101) corresponding to the airbag (405), and a sealing ring (102) for sealing the airbag (405) is provided in the sealing groove (101).

6. The upper air cushion partition control device for a press according to claim 1, characterized in that: The driving device comprises a driving air source (11), the driving air source (11) being connected to the control device via an electrical circuit, and the driving air source (11) being connected to the working area A airbag group (402) via the area A pneumatic pipeline (1101), and the driving air source (11) being connected to the working area B airbag group (403) via the area B pneumatic pipeline (1102); a two-position two-way solenoid valve (7) is installed on both the area A pneumatic pipeline (1101) and the area B pneumatic pipeline (1102), and the two-position two-way solenoid valve (7) is connected to the control device via an electrical circuit.

7. The upper air cushion partition control device for a press according to claim 6, characterized in that: One-way valves (10) are installed on both the pneumatic pipeline (1101) in zone A and the pneumatic pipeline (1102) in zone B.

8. The upper air cushion partition control device for a press according to claim 6, characterized in that: The pneumatic pipeline (1101) in zone A and the pneumatic pipeline (1102) in zone B are both connected to a muffler (9) via a pneumatic pipeline and a solenoid valve (701).

9. The upper air cushion partition control device for a press according to claim 6, characterized in that: The driving device further comprises two pressure sensors (8), and the two pressure sensors (8) are respectively connected to the working area A airbag group (402) and the working area B airbag group (403) via pneumatic pipelines.

10. The upper air cushion partition control device for a press according to claim 1, characterized in that: A buffer block (6) is installed between the slider pad (2) and the upper crown (3).

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