A pneumatic drive system and a quick clamping system for a bending machine mold composed of the same

Abstract

The present invention relates to the technical field of clamping molds for bending machines, and discloses a pneumatic drive system and a quick clamping system for bending machine molds composed of the pneumatic drive system, comprising a base; a mold clamping groove is provided on the base, and the mold clamping groove is used to accommodate a mold tool handle; a movable clamping tooth is provided at the lower part of the base, and a driving mechanism for driving the clamping tooth to move is provided inside the base; the driving mechanism includes an adapter and a force transmission member; a guide column is provided on the clamping tooth, and the adapter is clamped between the guide column and the force transmission member; a coupling wedge surface is provided at the bottom of the force transmission member, and a driving wedge surface is provided on the guide column; the clamped adapter is coupled with the coupling wedge surface and the driving wedge surface; the force transmission member is used to drive the adapter to roll relative to the coupling wedge surface and the driving wedge surface; a cavity is left at the top of the force transmission member, and a pneumatic pipeline is connected to the cavity; the force transmission member is pneumatically driven. The present invention can improve the efficiency of changing the molds of the bending machine, the clamping force is fully and evenly loaded, and the degree of automation is high.

Description

Technical Field

[0001] The present invention relates to the technical field of clamping a bending machine die, and in particular to a pneumatic drive system and a quick clamping system for a bending machine die composed of the pneumatic drive system. Background Art

[0002] Press brakes are a type of forging machine, primarily used for processing sheet metal. During processing, a hydraulic system generates pressure that is transmitted through a die to achieve the desired shape. Press brakes can bend the material into shapes at varying angles to meet diverse material processing requirements during machining. Currently, press brakes are widely used in a variety of industries, including construction machinery, automotive, rail transportation, and shipbuilding.

[0003] The clamping device of the bending machine mold is a connecting device that connects the bending machine and the bending mold, and is one of the key components of the bending machine. Usually, there are a certain number of clamping devices on each bending machine. When the bending machine mold is installed on the machine tool, each quick clamp needs to be clamped separately with bolts after the mold is loaded (a 3-meter bending machine generally has about 16-20 quick clamps); when unloading the mold, the quick clamp is loosened, and then the mold is pulled down while being bent back and forth by hand to unload the mold. Each time the mold is changed, the above loading and unloading process needs to be repeated, which wastes manpower and reduces production efficiency, and cannot realize automatic tool change for bending processing. At the same time, in this traditional quick clamping method, the clamping force on the mold is not uniform, which will cause inconsistency in the center of the bending upper mold, affecting the quality of the bent product.

[0004] In addition, some bending machine molds use hydraulic clamping devices for clamping. Although the clamping force is easier to control, the hydraulic clamping device requires the addition of a hydraulic circuit and a hydraulic clamping control system, which is complex in structure and has high manufacturing and application costs. In addition, the hydraulic system is prone to hydraulic oil leakage during operation, which greatly affects the processing process and also causes waste of resources. Summary of the Invention

[0005] The present invention aims to provide a pneumatic drive system and a quick clamping system for a bending machine mold composed of the same, which can improve the efficiency of changing the bending machine mold, have sufficient and uniform clamping force, a high degree of automation, and reliable operation.

[0006] To achieve the above object, the present invention provides the following solutions:

[0007] Option 1:

[0008] A pneumatic drive system includes a base; the base is provided with a mold clamping groove, the mold clamping groove is used to accommodate a mold tool handle;

[0009] The lower part of the base is provided with movable clamping teeth, and the clamping teeth are located around the clamping groove of the mold; the base is provided with a driving mechanism for driving the clamping teeth to move;

[0010] The driving mechanism includes an adapter and a force transmission member; a guide post is provided on the clamping teeth, and the adapter is clamped between the guide post and the force transmission member; a coupling wedge surface is provided at the bottom of the force transmission member, and a driving wedge surface is provided on the guide post; the clamped adapter is coupled to the coupling wedge surface and the driving wedge surface; the force transmission member is used to drive the adapter to roll relative to the coupling wedge surface and the driving wedge surface;

[0011] A cavity is reserved on the top of the force transmission member, and a pneumatic pipeline is connected to the cavity; the force transmission member is pneumatically driven.

[0012] The working principle and advantages of this solution are as follows: gas is input into the cavity by pneumatic management, and the gas transmits force to the force transmission member. The force transmission member is subjected to force and further transmits the pneumatic force to the guide column through the adapter in contact with it. The guide column is subjected to force and can drive the clamping teeth to move, thereby achieving clamping. In this process, the adapter rolls relative to the coupling wedge surface and the driving wedge surface, and couples with different surface segments of the coupling wedge surface and the driving wedge surface, which can achieve different limiting effects and help to maintain the stability of the guide column position. This solution uses pneumatically driven clamping, with sufficient clamping force and uniform clamping force loading, which can ensure sufficient and stable clamping of the mold and help to improve the quality of the bent product; the mold can be quickly clamped or loosened by controlling the gas loading, which can improve the efficiency of the bending machine mold replacement and has a higher degree of automation compared to traditional bolt-type quick clamps.

[0013] Moreover, compared with conventional hydraulic clamping systems, the pneumatic drive system used in this solution is simpler and does not have the risk of oil leakage, making the overall processing process more environmentally friendly. At the same time, the power source required for the pneumatic drive used in this solution is a power source that is relatively easy to obtain in actual processing workshops (such as a compressed air source, etc.). Therefore, this pneumatic drive system does not require additional customized power source devices, nor does it need to be equipped with additional hydraulic pumps and external pipelines like conventional hydraulic clamping systems. The system setup cost is lower and the structure is simpler. In terms of system control, there is no need for a complex electrical control system to control the output pressure, flow rate, flow rate and other parameters of the pump station. Instead, it can directly control the filling and suction, which is simpler to operate and has extremely low energy consumption. Moreover, under the conditions of long-term operation, the overall system drive of this system can also remain stable, and the problems of reduced overall clamping accuracy and aging of seals due to the heating of hydraulic oil, which are prone to occur in conventional hydraulic clamping systems, will not occur.

[0014] In addition, what is special is that in this solution, an adapter is provided to transmit force between the coupling wedge surface and the force transmission wedge surface. The provision of the adapter can provide a longer guide distance for the movement of the clamping teeth when the size of the overall device is constant. As a result, the accuracy of the movement and clamping of the clamping teeth will be higher, and a better clamping effect can be achieved. Compared with the conventional direct coupling method of wedge blocks and wedge blocks, this solution can achieve higher clamping accuracy by extending the guide distance through effective and simple structural improvements. Moreover, by using an adapter, two cylinder cavities (i.e., a pneumatic cavity that pushes the movement of the clamping teeth and a pneumatic cavity that pushes the force transmission member) can be provided to drive the clamping when driving the clamping. The clamping force provided can be increased by at least 10% compared to the conventional wedge coupling solution.

[0015] Furthermore, the driving wedge surface includes a first driving segment and a second driving segment connected to each other at a first preset angle; and the coupling wedge surface includes a first coupling segment and a second coupling segment connected to each other at a second preset angle.

[0016] Beneficial effects: Both the driving wedge surface and the coupling wedge surface include multiple wedge surface segments. The driving steel ball is coupled with different wedge surface segments to achieve different force transmission effects, thereby better driving the clamping teeth to move.

[0017] Furthermore, a guide hole and a receiving hole are provided in the base; the guide hole is used to receive the force transmission member and provide a movement space for the force transmission member, and the receiving hole is used to receive the steel ball and provide a movement space for the adapter; the guide hole is connected to the receiving hole.

[0018] Beneficial effects: The guide hole and the accommodating hole can provide activity space for the force transmission member and the adapter respectively, and can also limit the activity range of the force transmission member and the adapter, thereby ensuring that the driving force of the driving mechanism can be effectively transmitted.

[0019] Furthermore, the force transmission member is a force transmission pin; the guide column is integrally connected to the clamping tooth guide shaft; the axis of the force transmission pin is parallel to the axis of the guide column, and the motion trajectory of the adapter is perpendicular to the axis of the guide column; the motion trajectory of the clamping tooth is parallel to the axis of the guide column; the driving mechanism also includes a pneumatic piston; the pneumatic piston is connected to the top of the force transmission pin.

[0020] Beneficial effect: The pneumatic piston pushes the force transmission pin. Compared with directly pushing the force transmission pin, this arrangement makes the movement of the force transmission pin more controllable and the clamping action more stable.

[0021] Furthermore, the force transmission member is a pneumatic force amplifying ring; the guide column is integrally connected to the clamping tooth guide shaft; the movement trajectory of the adapter is perpendicular to the axis of the guide column; the movement trajectory of the clamping tooth is parallel to the axis of the guide column; the pneumatic force amplifying ring is coaxially sleeved on the guide column.

[0022] Beneficial effects: the pneumatic force amplifying ring and the guide column are coaxially sleeved, and the guide column is integrally connected to the clamping tooth guide shaft, the arrangement of the driving mechanism and the clamping teeth is more compact, and the driving force is transmitted more directly.

[0023] Furthermore, a limiting protrusion is provided on the clamping tooth, and the limiting protrusion is located in the cavity; a limiting ring is provided between the limiting protrusion and the pneumatic booster ring.

[0024] Beneficial effect: The cooperation between the limiting ring and the limiting protrusion can limit the moving range of the clamping tooth guide shaft, that is, can limit the moving range of the clamping teeth, making it easier to control the clamping degree of the clamping teeth.

[0025] Furthermore, the force transmission member is a pneumatic force amplifying ring; the guide column and the clamping teeth are separately arranged; the guide column is a pneumatically driven wedge rod with a first wedge surface on the bottom surface; the clamping teeth are provided with a second wedge surface that matches the first wedge surface; the pneumatic force amplifying ring and the pneumatically driven wedge rod are coaxially arranged; the motion trajectory of the adapter is parallel to the axis of the guide column; the motion trajectory of the clamping teeth is perpendicular to the axis of the guide column; the driving wedge surface is the outer cylindrical surface of the pneumatically driven wedge rod, and multiple adapters are provided around the circumference of the pneumatically driven wedge rod.

[0026] Beneficial effect: In this solution, several adapters are used to cooperate with the driving wedge surface of the pneumatic driving wedge rod. Compared with a single steel ball, the force transmission is more balanced and more stable.

[0027] Option 2:

[0028] A quick clamping system for a bending machine mold includes a clamping beam and an array of pneumatic drive systems arranged on the clamping beam as described in Solution 1.

[0029] The benefits and advantages of this solution are: This rapid clamping system enables rapid, powerful, and uniform clamping and quick release of press brake molds, helping to improve the efficiency of press brake mold changes and enabling quick mold changes. Furthermore, the pneumatic drive of the clamping teeth completely eliminates the risk of oil leakage associated with conventional hydraulic pumps and pipelines, making the system more energy-efficient and environmentally friendly.

[0030] Furthermore, the pneumatic drive system is evenly distributed on the clamping beam in an array.

[0031] Beneficial effect: The pneumatic drive system is evenly arranged, so the mold is clamped more evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of the pneumatic drive system of the first embodiment of the present invention in a mold release state;

[0033] Figure 2 This is a schematic structural diagram of the pneumatic drive system in the mold clamping state according to the first embodiment of the present invention;

[0034] Figure 3 Schematic diagram of the structure of the guide pin and pneumatic piston of the pneumatic drive system of Example 1 of the present invention;

[0035] Figure 4 Schematic diagram of the partial structure of the driving mechanism of the pneumatic driving system according to the first embodiment of the present invention;

[0036] Figure 5 This is a schematic structural diagram of the pneumatic drive system of the second embodiment of the present invention in a mold release state;

[0037] Figure 6 This is a schematic structural diagram of the pneumatic drive system in the mold clamping state according to the second embodiment of the present invention;

[0038] Figure 7 This is a schematic diagram of the partial structure of the driving mechanism of the pneumatic driving system according to the second embodiment of the present invention;

[0039] Figure 8 This is a schematic structural diagram of the pneumatic drive system of the third embodiment of the present invention in a mold release state;

[0040] Figure 9 This is a schematic structural diagram of the pneumatic drive system in the mold clamping state according to the third embodiment of the present invention;

[0041] Figure 10 This is a schematic diagram of the partial structure of the driving mechanism of the pneumatic driving system according to the third embodiment of the present invention;

[0042] Figure 11 This is a schematic structural diagram of a quick clamping system for a bending machine mold according to a first embodiment of the present invention;

[0043] Figure 12 This is a schematic structural diagram of a quick clamping system for a bending machine mold according to a second embodiment of the present invention;

[0044] Figure 13 This is a schematic structural diagram of the pneumatic drive system of the fourth embodiment of the present invention in a mold release state;

[0045] Figure 14 This is a structural diagram of the pneumatic drive system of embodiment 5 of the present invention when the mold is released. DETAILED DESCRIPTION

[0046] The following is a further detailed description through specific implementation methods:

[0047] The marks in the drawings of the specification include: front cover 1, rear cover 2, base 3, guide hole 31, clamping gear guide shaft 41, connecting shaft 42, tooth body 43, pneumatic piston 5, force transmission pin 6, pneumatic force amplifying ring 7, annular portion 71, protrusion 72, first annular portion 73, second annular portion 74, steel ball 8, guide column 9, coupling wedge surface 10, second coupling section 101, first coupling section 102, driving wedge surface 11, second driving section 111, first driving section 112, first spring 12, second spring 13, cavity 14, pneumatic pipeline 15, plug 16, limiting protrusion 17, limiting ring 18, first wedge surface 19, second wedge surface 20, cylinder housing 21, cylinder head 22.

[0048] Example 1:

[0049] The embodiment is basically as shown in the attached Figure 1 、 Figure 2 Shown: A pneumatic drive system includes a front cover 1, a base 3 and a rear cover 2 arranged from left to right; the front cover 1 and the rear cover 2 are connected to the front surface and the rear surface of the base 3 respectively.

[0050] The base 3 is provided with a mold clamping groove for accommodating the mold tool holder. A movable clamping tooth is provided at the bottom of the base 3, located around the mold clamping groove. The clamping tooth comprises an integrally formed clamping tooth guide shaft 41, a connecting shaft 42, and a tooth body 43, all connected in sequence. Specifically, the clamping tooth is approximately in the shape of a "ㄈ". A drive mechanism is provided within the base 3 for driving the clamping tooth.

[0051] In this embodiment, the driving mechanism includes a pneumatic piston 5, a force transmission member, and an adapter arranged in sequence from left to right. In this embodiment and the following embodiments, the adapter adopts a steel ball 8, which has a simple structure and is easy to drive. Optionally, the adapter can also adopt a pin with semi-cylindrical arc surfaces at both ends, or other workpieces with arc surfaces and rollable end faces that can be coupled with the coupling wedge surface 10 and the driving wedge surface 11 and can roll relative to the coupling wedge surface 10 and the driving wedge surface 11. The driving mechanism is arranged on the upper part of the clamping tooth guide shaft 41. A guide hole 31, a receiving hole, and a clamping tooth guide hole are provided in the base 3. The positions of the guide hole 31 and the receiving hole correspond to the upper part of the clamping tooth guide shaft 41. The guide hole 31 is used to accommodate the force transmission member and provide a movement space for the force transmission member, and the receiving hole is used to accommodate the steel ball 8 and provide a movement space for the steel ball 8; the guide hole 31 is connected to the receiving hole. The clamping gear guide shaft 41 is positioned within the clamping gear guide hole and moves back and forth along the axis of the clamping gear guide hole. In this embodiment, the free end of the clamping gear guide shaft 41 is connected to a first spring 12. One end of the first spring 12 is connected to the clamping gear guide shaft 41, and the other end is fixedly connected to the rear cover 2. A slot for accommodating the first spring 12 is provided in the rear cover 2, and the slot is aligned with the clamping gear guide hole.

[0052] The clamping teeth are provided with a guide post 9, which is integrally connected or integrally made with the clamping teeth guide shaft 41. The steel ball 8 is clamped between the guide post 9 and the force transmission member. The bottom of the force transmission member is provided with a coupling wedge surface 10, and the guide post 9 is provided with a driving wedge surface 11; the clamped steel ball 8 is coupled with the coupling wedge surface 10 and the driving wedge surface 11; the force transmission member is used to drive the steel ball 8 to roll relative to the coupling wedge surface 10 and the driving wedge surface 11. In this embodiment, as shown in the attached Figure 3 and Figure 4 As shown, the force transmission member is a force transmission pin 6; the pneumatic piston 5 is connected to the top of the force transmission pin 6. A T-shaped slot is provided on the top of the force transmission pin 6, and the pneumatic piston 5 is clamped together with the force transmission pin 6 through the T-shaped slot. The axis of the force transmission pin 6 is parallel to the axis of the guide column 9. A coupling wedge surface 10 is provided at the bottom of the outer cylindrical surface of the force transmission pin 6. The coupling wedge surface 10 includes a first coupling section 102 and a second coupling section 101 connected at a second preset angle. The second preset angle is 6 degrees to 10 degrees. The surfaces of the first coupling section 102 and the second coupling section 101 are both concave arc surfaces, and the curvature of the arc surface is adapted to the surface curvature of the steel ball 8.

[0053] A driving wedge surface 11 is provided on the outer circumferential surface of the guide column 9 (i.e., the clamping tooth guide shaft 41). Specifically, the driving wedge surface 11 includes a first driving segment 112 and a second driving segment 111 connected at a first preset angle; the first preset angle is 30 degrees to 45 degrees. The driving wedge surface 11 is provided on the guide column 9 in the form of a protrusion, and its setting position is close to the 1 / 3 position of the clamping tooth guide shaft 41 and close to the connecting shaft 42. The shape of the protrusion is approximately a right-angled trapezoid. The surface corresponding to the hypotenuse of the right-angled trapezoid is the first driving segment 112, and the surface is an inwardly concave arc surface, and the curvature of the arc surface is adapted to the surface curvature of the steel ball 8; the surface corresponding to the upper edge line of the right-angled trapezoid is the second driving segment 111, and the surface is a plane. The motion trajectory of the steel ball 8 is perpendicular to the axis of the guide column 9; the motion trajectory of the clamping tooth is parallel to the axis of the guide column 9.

[0054] The force transmission member has a cavity 14 at its top, which is connected to a pneumatic line 15. The force transmission member is pneumatically driven. Specifically, in this embodiment, the front cover 1 is provided with a slot, at the opening of which a plug 16 is installed. The plug 16 and the slot cooperate to form the cavity 14. The pneumatic line 15 is located in the slot near the plug 16, with the slot width matching the diameter of the pneumatic line 15. A through hole is also provided on the contact surface between the front cover 1 and the base 3. This through hole is connected to the cavity 14 and is coaxial with the pneumatic piston 5.

[0055] In specific applications, such as Figure 1As shown, when the clamping teeth are released, the pneumatic piston 5 is in contact with the front cover 1, and the first spring 12 connected to the clamping tooth guide shaft 41 is in a normal state. The steel ball 8 is clamped between the force transmission pin 6 and the guide post 9. The steel ball 8 and the surface are simultaneously coupled to the second driving section 111 of the drive wedge surface 11 and the second coupling section 101 of the coupling wedge surface 10. Compressed air is fed into the cavity 14 via the pneumatic line 15. The gas then applies pneumatic force to the pneumatic piston 5 through the through-holes of the front cover 1. The pneumatic piston 5 pushes the force transmission pin 6, which in turn moves relative to the steel ball 8. The steel ball 8 moves from the second coupling section 101 of the coupling wedge surface 10 to the first coupling section 102, and correspondingly, from the second driving section 111 of the drive wedge surface 11 to the first driving section 112. During this process, the guide post 9 moves rightward relative to the steel ball 8. That is, the force transmission pin 6 and the steel ball 8 work together to drive the guide post 9, and thus the clamping teeth, to the right, thereby achieving clamping. In the clamping state of the clamping teeth, the pneumatic piston 5 is separated from the front cover 1 by a distance corresponding to the distance the clamping teeth move; and the first spring 12 connected to the clamping teeth guide shaft 41 is compressed. Figure 2 After the pneumatic drive is stopped, the elastic force of the first spring 12 can push the clamping teeth to move leftward, thereby automatically loosening the clamping teeth and canceling the clamping.

[0056] As attached Figure 11 As shown, this embodiment also provides a quick clamping system for a press brake mold, comprising a clamping beam and an array of pneumatic drive systems, such as those described above, arranged on the clamping beam. The pneumatic drive systems are evenly distributed on the clamping beam in an array. In practical applications, the number of pneumatic drive systems can be set according to actual processing needs.

[0057] This embodiment provides a pneumatic drive system and a quick clamping system for press brake dies. This pneumatic drive system improves the efficiency of press brake die replacement, provides sufficient and uniform clamping force, and offers a high degree of automation. This solution is particularly suitable for dies with centered toolholder axes, offering a high degree of structural adaptability.

[0058] Example 2:

[0059] As attached Figure 5 and Figure 6 As shown, a pneumatic drive system includes a front cover 1, a base 3 and a rear cover 2 arranged in sequence from left to right; the front cover 1 and the rear cover 2 are connected to the front surface and the rear surface of the base 3 respectively.

[0060] The base 3 is provided with a mold clamping groove for accommodating the mold tool holder. The base 3 has movable clamping teeth positioned around the mold clamping groove at its lower portion. A drive mechanism for moving the clamping teeth is housed within the base 3. In this embodiment, two sets of clamping teeth and drive mechanisms are provided, arranged bilaterally and symmetrically. This arrangement allows a single pneumatic drive system to offer a wider range of mold clamping positions and methods, enhancing its adaptability.

[0061] Taking the drive mechanism on the left side of the base 3 as an example, the drive mechanism includes, from left to right, a steel ball 8 and a force transmission member. A guide post 9 is provided on the clamping teeth, and the steel ball 8 is clamped between the guide post 9 and the force transmission member. A coupling wedge surface 10 is provided at the bottom of the force transmission member, and a driving wedge surface 11 is provided on the guide post 9. The clamped steel ball 8 couples with the coupling wedge surface 10 and the driving wedge surface 11. The force transmission member is used to drive the steel ball 8 to roll relative to the coupling wedge surface 10 and the driving wedge surface 11.

[0062] Moreover, the driving mechanism is arranged at the upper part of the clamping tooth guide shaft 41. In this embodiment, the clamping tooth includes a clamping tooth guide shaft 41, a connecting shaft 42 and a tooth body 43 which are integrally made and connected in sequence. Specifically, the clamping tooth is approximately in the shape of a "ㄈ". The guide column 9 is integrally connected to or integrally made with the clamping tooth guide shaft 41. A guide hole 31, a receiving hole and a clamping tooth guide hole are provided in the base 3. The positions of the guide hole 31 and the receiving hole are correspondingly located at the upper part of the clamping tooth guide shaft 41. The guide hole 31 is used to accommodate the force transmission member and provide a movement space for the force transmission member. The receiving hole is used to accommodate the steel ball 8 and provide a movement space for the steel ball 8. The guide hole 31 is connected to the receiving hole. The clamping tooth guide shaft 41 is provided in the clamping tooth guide hole and moves back and forth along the axis direction of the clamping tooth guide hole.

[0063] As attached Figure 7 As shown, the force transmission member is a pneumatic booster ring 7. The pneumatic booster ring 7 is coaxially sleeved on the guide column 9 (i.e., the clamping tooth guide shaft 41). Specifically, the pneumatic booster ring 7 includes an annular portion 71 and a raised portion 72 that are integrally connected; the raised portion 72 is the bottom of the pneumatic booster ring 7; the inner side surface of the raised portion 72 is a coupling wedge surface 10, which includes a first coupling section 102 and a second coupling section 101 that are connected at a second preset angle. The second preset angle is 6 degrees to 10 degrees. The surfaces of the first coupling section 102 and the second coupling section 101 are both concave arc surfaces, and the curvature of the arc surface is adapted to the surface curvature of the steel ball 8.

[0064] A cavity 14 is provided at the top of the pneumatic booster ring 7, and a pneumatic line 15 is connected to the cavity 14; the force transmission member is pneumatically driven. Specifically, the cavity 14 is actually a portion of the guide hole 31. A limiting protrusion 17 is provided on the clamping tooth guide shaft 41 of the clamping tooth, and the limiting protrusion 17 is located in the cavity 14; a limiting ring 18 is provided between the limiting protrusion 17 and the pneumatic booster ring 7. The limiting ring 18 and the limiting protrusion 17 cooperate to limit the movement range of the clamping tooth guide shaft 41, that is, to limit the movement range of the clamping tooth, making it easier to control the clamping degree of the clamping tooth.

[0065] A driving wedge surface 11 is provided on the outer circumference of the guide post 9 (clamping tooth guide shaft 41). Specifically, the driving wedge surface 11 comprises a first driving segment 112 and a second driving segment 111 connected at a first predetermined angle of 30 to 45 degrees. The driving wedge surface 11 forms a step on the outer circumference of the guide post 9 and is located near the point where the clamping tooth guide shaft 41 and the connecting shaft 42 meet. The motion trajectory of the steel ball 8 is perpendicular to the axis of the guide post 9; the motion trajectory of the clamping tooth is parallel to the axis of the guide post 9.

[0066] In specific applications, such as Figure 5 As shown, when the clamping teeth are released, they contact the inner wall of the front cover 1. A protrusion is provided on the inner wall of the front cover 1. The protrusion's position corresponds to the position of the steel ball 8, and the height of the protrusion is approximately equal to the distance the clamping teeth need to move when clamping. The steel ball 8 is simultaneously coupled to the top surface of the protrusion, the second driving segment 111 of the driving wedge surface 11, and the second coupling segment 101 of the coupling wedge surface 10.

[0067] Then, compressed air is input into the cavity 14 through the pneumatic pipeline 15, and the limiting protrusion 17 and the pneumatic booster ring 7 are both pushed by the gas. Since the pneumatic booster ring 7 is also restricted by the stuck steel ball 8, the gas will first push the limiting protrusion 17, and the limiting protrusion 17 drives the clamping teeth to move along the axis of the clamping tooth guide shaft 41 in the direction opposite to the force direction of the pneumatic booster ring 7, which in this embodiment is towards the center of the base 3; in this process, the first driving section 112 of the driving wedge surface 11 of the guide column 9 (that is, the clamping tooth guide shaft 41) naturally moves to the bottom of the steel ball 8, and the steel ball 8 can move along it. At the same time, the pneumatic booster ring 7 moves in the direction opposite to the movement of the clamping teeth under the action of air pressure, and the steel ball 8 is then simultaneously coupled to the top surface of the protrusion, the first driving section 112 of the driving wedge surface 11 and the first coupling section 102 of the coupling wedge surface 10; thereby achieving stable clamping, as shown in the attached figure. Figure 6 shown.

[0068] As attached Figure 12As shown, this embodiment also provides a quick clamping system for a bending machine mold, comprising a clamping beam and an array of pneumatic drive systems arranged on the clamping beam, such as the above-mentioned pneumatic drive systems. The pneumatic drive systems are evenly distributed on the clamping beam in an array.

[0069] This embodiment provides a pneumatic drive system and a quick clamping system for press brake dies. Compared to the first embodiment, this embodiment utilizes a single pneumatic drive system, providing a wider range of die clamping positions and methods, and is more adaptable. This solution is particularly suitable for dies with handles whose axis is close to the side and have buttons on the handle, and has a high degree of structural adaptability.

[0070] Example 3:

[0071] As attached Figure 8 and Figure 9 As shown, a pneumatic drive system includes a front cover 1, a base 3 and a rear cover 2 arranged in sequence from left to right; the front cover 1 and the rear cover 2 are connected to the front surface and the rear surface of the base 3 respectively.

[0072] The base 3 is provided with a mold clamping groove for accommodating the mold tool holder; the lower portion of the base 3 is provided with movable clamping teeth, which are located around the mold clamping groove; the base 3 is provided with a driving mechanism for driving the clamping teeth to move. The driving mechanism includes a steel ball 8 and a force transmission member, which are arranged from left to right. A guide column 9 is provided on the clamping teeth, and the steel ball 8 is clamped between the guide column 9 and the force transmission member; a coupling wedge surface 10 is provided at the bottom of the force transmission member, and a driving wedge surface 11 is provided on the guide column 9; the clamped steel ball 8 is coupled to the coupling wedge surface 10 and the driving wedge surface 11; the force transmission member is used to drive the steel ball 8 to roll relative to the coupling wedge surface 10 and the driving wedge surface 11; a cavity 14 is left at the top of the force transmission member, and a pneumatic pipeline 15 is connected to the cavity 14; the force transmission member is pneumatically driven.

[0073] Specifically, the clamping teeth include a clamping tooth guide shaft 41, a connecting shaft 42, and a tooth body 43, which are integrally formed and connected in sequence. Specifically, the clamping teeth are approximately in the shape of a "ㄈ". The base 3 is provided with a guide hole 31, a receiving hole, and a clamping tooth guide hole. The guide hole 31 and the receiving hole are located correspondingly above the clamping tooth guide shaft 41. The guide hole 31 is used to accommodate the force transmission member and provide a movement space for the force transmission member. The receiving hole is used to accommodate the steel ball 8 and provide a movement space for the steel ball 8. In this embodiment, the guide hole 31 and the receiving hole are connected to form a hole, and the cylinder housing 21 and the cylinder head 22 are provided in the hole. The drive mechanism is provided in the cylinder housing 21. The cylinder head 22 is located above the top of the force transmission member, and a groove is provided at the center of the bottom surface of the cylinder head 22. The bottom of the cylinder housing 21 is against the steel ball 8, that is, the steel ball 8 is stuck between the cylinder housing 21, the guide column 9, and the force transmission member. The clamping tooth guide shaft 41 is disposed in the clamping tooth guide hole and moves back and forth along the axis direction of the clamping tooth guide hole.

[0074] In this embodiment, two sets of clamping teeth and drive mechanisms are provided, and they are arranged symmetrically on both sides. This arrangement allows a single pneumatic drive system to provide a wider range of mold clamping positions and mold clamping methods, making it more adaptable. Accordingly, two sets of guide holes 31, receiving holes, and clamping tooth guide holes are also arranged symmetrically on both sides of the base 3. The left and right clamping tooth guide holes are connected to form a single hole, and the left and right clamping tooth guide shafts 41 are installed in this hole. A second spring 13 is connected between the left and right clamping tooth guide shafts 41, which can subsequently assist in moving the clamping teeth.

[0075] Taking the driving mechanism arranged on the left side of the base 3 as an example, the force transmission member is a pneumatic force amplifying ring 7. Figure 10 As shown, the pneumatic booster ring 7 includes an integrally connected first annular portion 73 and a second annular portion 74. The bottom of the second annular portion 74 forms the bottom of the pneumatic booster ring 7. The top of the first annular portion 73 forms the top of the pneumatic booster ring 7. The top surface of the first annular portion 73 is a sloped surface with a third preset angle, which is between 15 and 30 degrees. This arrangement allows the cylinder head 22 to be installed as compactly as possible, maximizing space utilization. When the guide post 9 descends, air pressure enters the sloped surface, providing a driving force for the pneumatic booster ring 7 to move downward, further facilitating clamping. The inner side of the second annular portion 74 forms a coupling wedge surface 10, which includes a first coupling segment 102 and a second coupling segment 101 connected at a second preset angle, which is between 6 and 10 degrees.

[0076] The guide column 9 is separately provided with the clamping teeth; the guide column 9 is a pneumatically driven wedge rod with a first wedge surface 19 on the bottom surface; the clamping teeth are provided with a second wedge surface 20 that matches the first wedge surface 19. Specifically, the second wedge surface 20 is located on the upper portion of the outer circumferential surface of the clamping tooth guide shaft 41. The pneumatic booster ring 7 is coaxially provided with the pneumatically driven wedge rod, and the pneumatic booster ring 7 is sleeved on the pneumatically driven wedge rod. The axis of the pneumatically driven wedge rod is perpendicular to the axis of the clamping tooth guide shaft 41. The motion trajectory of the steel ball 8 is parallel to the axis of the guide column 9; the motion trajectory of the clamping teeth is perpendicular to the axis of the guide column 9. The driving wedge surface 11 is the outer circumferential surface of the pneumatically driven wedge rod, and a plurality of steel balls 8 are evenly arranged around the circumference of the pneumatically driven wedge rod, and two are provided in this embodiment. Specifically, the driving wedge surface 11 includes a first driving section 112 and a second driving section 111 connected at a first preset angle; the first preset angle is 30 degrees to 45 degrees.

[0077] In specific applications, such as Figure 8 As shown, when the clamping teeth are released, the top surface of the pneumatic booster ring 7 contacts the bottom surface of the cylinder head 22, and the top surface of the guide post 9 is flush with the pneumatic booster ring 7. Furthermore, due to the groove in the bottom of the cylinder head 22, the space left by the groove forms a cavity 14, and the pneumatic conduit is connected to this cavity 14. At this point, the steel ball 8 is simultaneously coupled to the cylinder housing 21, the second drive segment 111 of the drive wedge 11, and the second coupling segment 101 of the coupling wedge 10. The first wedge surface 19 of the pneumatic drive wedge rod only partially overlaps with the second wedge surface 20 of the clamping teeth.

[0078] Then, compressed air is input into the cavity 14 through the pneumatic pipeline 15, and the gas will first directly push the pneumatic drive wedge rod to move vertically downward along its axial direction. During this process, the first drive section 112 of the drive wedge surface 11 of the pneumatic drive wedge rod naturally moves to the bottom of the steel ball 8; at the same time, the pneumatic drive ring is gradually driven by the gas and also moves vertically downward along its axial direction, and the first coupling section 102 of the coupling inclined surface of the pneumatic drive ring naturally moves to the bottom of the steel ball 8; at this time, the steel ball 8 is simultaneously coupled to the cylinder housing 21, the first drive section 112 of the drive wedge surface 11 and the first coupling section 102 of the coupling wedge surface 10, stably limiting the position of the pneumatic drive wedge rod; and the first wedge surface 19 moves downward and completely overlaps with the second wedge surface 20; accordingly, in the process of the first wedge surface 19 gradually overlapping with the second wedge surface 20, the pneumatic drive wedge rod transmits force to the clamping teeth, thereby causing the clamping teeth to move along the axis of the clamping tooth guide shaft 41 toward the center direction of the base 3, thereby achieving stable clamping, as shown in the attached figure. Figure 9 When clamped, the second springs 13 connected between the left and right clamping tooth guide shafts 41 are compressed. When the pneumatic drive is stopped, the elastic force generated by the compression of the second springs 13 pushes the clamping teeth along the axis of the clamping tooth guide shafts 41, away from the center of the base 3, automatically releasing the clamping teeth and thus canceling the clamping.

[0079] This embodiment also provides a quick clamping system for a bending machine mold, comprising a clamping beam and an array of pneumatic drive systems arranged on the clamping beam, such as the above-mentioned pneumatic drive systems. The pneumatic drive systems are evenly distributed on the clamping beam in an array.

[0080] This embodiment provides a pneumatic drive system and a quick clamping system for press brake dies. Compared to the first embodiment, this system offers a wider range of die clamping positions and offers greater applicability. Furthermore, compared to the second embodiment, the provision of a second spring 13 facilitates automatic release after clamping, resulting in a higher degree of automation. This solution is particularly suitable for dies where the toolholder axis is close to the side and the toolholder is provided with a tool hanging groove, offering a high degree of structural adaptability.

[0081] Example 4:

[0082] As attached Figure 13 As shown, a pneumatic drive system includes a front cover 1, a base 3, and a rear cover 2, arranged from right to left. The front cover 1 and the rear cover 2 are connected to the front and rear surfaces of the base 3, respectively. The system is mounted on the lower workbench of a bending machine and is used to clamp the lower mold of the bending machine. Based on the pneumatic drive system of Example 2, this embodiment makes the following structural adjustments.

[0083] In this embodiment, only one set of clamping teeth and driving mechanism is provided, and both are located on the right side of the base 3 .

[0084] The drive mechanism includes a steel ball 8 and a force transmission member, arranged from right to left. A guide post 9 is provided on the clamping tooth, with the steel ball 8 clamped between the guide post 9 and the force transmission member. A coupling wedge surface 10 is provided at the bottom of the force transmission member, and a driving wedge surface 11 is provided on the guide post 9. The clamped steel ball 8 couples with the coupling wedge surface 10 and the driving wedge surface 11. The force transmission member is used to drive the steel ball 8 to roll relative to the coupling wedge surface 10 and the driving wedge surface 11. Furthermore, the drive mechanism is located above the clamping tooth guide shaft 41.

[0085] In this embodiment, a movable clamping tooth is provided on the upper portion of the base 3, and the clamping tooth comprises an integrally formed clamping tooth guide shaft 41, a connecting shaft 42, and a tooth body 43. The clamping tooth guide shaft 41 is integrally connected to the middle portion of the connecting shaft 42, and the tooth body 43 is integrally connected to the top portion of the connecting shaft 42.

[0086] In specific applications, the operation mode of the pneumatic drive system is the same as that described in the second embodiment, and will not be described in detail here.

[0087] The pneumatic drive system and the quick clamping system for a bending machine mold composed of the pneumatic drive system provided in this embodiment can be applied to the clamping of the lower mold and have a wide range of applications.

[0088] Embodiment 5:

[0089] As attached Figure 14 As shown, a pneumatic drive system includes a front cover 1, a base 3, and a rear cover 2, arranged from right to left. The front cover 1 and the rear cover 2 are connected to the front and rear surfaces of the base 3, respectively. The system is mounted on the lower workbench of a press brake and is used to clamp the lower mold of the press brake. Based on the pneumatic drive system of Example 3, this embodiment makes the following structural adjustments.

[0090] The upper part of the base 3 is provided with movable clamping teeth, which are located around the mold clamping groove; the clamping teeth include a clamping tooth guide shaft 41, a connecting shaft 42 and a tooth body 43 that are made of one piece and connected in sequence; specifically, the clamping teeth are approximately "Z" shaped.

[0091] The driving mechanism is arranged at the lower part of the clamping tooth guide shaft 41. In this embodiment, only one set of clamping teeth and driving mechanism are provided, and they are arranged on the right side of the base 3. The driving mechanism includes a force transmission member and a steel ball 8 arranged from right to left. The force transmission member is a pneumatic booster ring 7. Specifically, the pneumatic booster ring 7 includes an annular portion 71 and a raised portion 72 connected as one piece; the raised portion 72 is the bottom of the pneumatic booster ring 7; the inner side surface of the raised portion 72 is a coupling wedge surface 10, and the coupling wedge surface 10 includes a first coupling section 102 and a second coupling section 101 connected at a second preset angle. The top surface of the annular portion 71 is a bevel, and the inclination angle of the bevel is a third preset angle; the third preset angle is 15 degrees to 30 degrees.

[0092] The guide post 9 is integrally formed with the clamping teeth. The guide post 9 is a pneumatically driven wedge rod without a wedge surface on its bottom surface (correspondingly, the second wedge surface 20 is omitted). The pneumatically driven wedge rod is coaxial with the clamping tooth guide shaft 41. When the pneumatically driven wedge rod moves, the clamping tooth guide shaft 41 moves synchronously. The motion trajectory of the steel ball 8 is parallel to the axis of the guide post 9; the motion trajectory of the clamping teeth is parallel to the axis of the guide post 9. The drive wedge surface 11 is the outer circumferential surface of the pneumatically driven wedge rod, and the steel ball 8 is provided circumferentially around the pneumatically driven wedge rod.

[0093] In practice, when the clamping teeth are released, the top surface of the pneumatic booster ring 7 contacts the bottom surface of the cylinder head 22, and the top surface of the guide post 9 is flush with the pneumatic booster ring 7. Furthermore, since the bottom of the cylinder head 22 is provided with a groove, the space left by the groove forms the cavity 14, and the pneumatic conduit communicates with this cavity 14. At this point, the steel ball 8 is simultaneously coupled to the cylinder housing 21, the second drive segment 111 of the drive wedge 11, and the second coupling segment 101 of the coupling wedge 10.

[0094] Then, compressed air is input into the cavity 14 through the pneumatic pipeline 15. The gas will first directly push the pneumatic drive wedge rod to move horizontally to the left along its axial direction. During this process, the first drive section 112 of the drive wedge surface 11 of the pneumatic drive wedge rod naturally moves to the bottom of the steel ball 8; at the same time, the pneumatic drive ring is gradually driven by the gas and also moves horizontally to the left along its axial direction. The first coupling section 102 of the coupling bevel of the pneumatic drive ring naturally moves to the bottom of the steel ball 8; at this time, the steel ball 8 is simultaneously coupled to the cylinder housing 21, the first drive section 112 of the drive wedge surface 11 and the first coupling section 102 of the coupling wedge surface 10, stably limiting the position of the pneumatic drive wedge rod; during this process, when the pneumatic drive wedge rod moves, it drives the clamping teeth to move along the axis of the clamping tooth guide shaft 41 toward the center of the base 3, thereby achieving stable clamping.

[0095] The pneumatic drive system and the quick clamping system for a bending machine mold composed of the pneumatic drive system provided in this embodiment can be applied to the clamping of the lower mold and have a wide range of applications.

[0096] It should be additionally noted that, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0097] In addition, the terms "first", "second", etc. are used for descriptive purposes only and are not to be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0098] In this specification, the schematic representations of the terms do not necessarily refer to the same embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments.

[0099] The above is only an embodiment of the present invention. Common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the guidance of this application. Some typical well-known structures or well-known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A pneumatic drive system, characterized in that: The mold clamping groove is provided on the base, and the mold clamping groove is used to accommodate the mold handle; The lower part of the base is provided with movable clamping teeth, and the clamping teeth are located around the clamping groove of the mold; the clamping teeth include a clamping tooth guide shaft, a connecting shaft and a tooth body that are integrally made and connected in sequence; a driving mechanism for driving the clamping teeth to move is provided inside the base; The driving mechanism includes an adapter and a force transmission member; a guide column is provided on the clamping teeth, and the adapter is clamped between the guide column and the force transmission member; a coupling wedge surface is provided at the bottom of the force transmission member, and a driving wedge surface is provided on the guide column; the clamped adapter is coupled to the coupling wedge surface and the driving wedge surface; The driving wedge surface includes a first driving segment and a second driving segment connected at a first preset angle; the coupling wedge surface includes a first coupling segment and a second coupling segment connected at a second preset angle; The force transmission member is used to drive the adapter to roll relative to the coupling wedge surface and the driving wedge surface; A cavity is left at the top of the force transmission member, and a pneumatic pipeline is connected to the cavity; the force transmission member is pneumatically driven; a guide hole and a receiving hole are opened in the base; the guide hole is used to accommodate the force transmission member and provide a movement space for the force transmission member, and the receiving hole is used to accommodate the transfer member and provide a movement space for the adapter; the guide hole is connected to the receiving hole.

2. A pneumatic drive system according to claim 1, characterized in that: The force transmission part is a force transmission pin; the guide column is integrally connected to the clamping tooth guide shaft; the axis of the force transmission pin is parallel to the axis of the guide column, and the motion trajectory of the adapter is perpendicular to the axis of the guide column; the motion trajectory of the clamping tooth is parallel to the axis of the guide column; the driving mechanism also includes a pneumatic piston; the pneumatic piston is connected to the top of the force transmission pin.

3. A pneumatic drive system according to claim 1, characterized in that: The force transmission part is a pneumatic force amplifying ring; the guide column is integrally connected to the clamping tooth guide shaft; the movement trajectory of the adapter is perpendicular to the axis of the guide column; the movement trajectory of the clamping tooth is parallel to the axis of the guide column; the pneumatic force amplifying ring is coaxially sleeved on the guide column.

4. A pneumatic drive system according to claim 3, characterized in that: A limiting protrusion is provided on the clamping teeth, and the limiting protrusion is located in the cavity; a limiting ring is provided between the limiting protrusion and the pneumatic booster ring.

5. The pneumatic drive system according to claim 1, characterized in that: The force transmission part is a pneumatic force amplifying ring; the guide column and the clamping teeth are arranged separately; the guide column is a pneumatically driven wedge rod with a first wedge surface on the bottom surface; the clamping teeth are provided with a second wedge surface that matches the first wedge surface; the pneumatic force amplifying ring and the pneumatically driven wedge rod are arranged coaxially; the movement trajectory of the adapter is parallel to the axis of the guide column; the movement trajectory of the clamping teeth is perpendicular to the axis of the guide column; the driving wedge surface is the outer cylindrical surface of the pneumatically driven wedge rod, and multiple adapters are provided around the circumference of the pneumatically driven wedge rod.

6. A quick clamping system for a bending machine mold, characterized in that: The pneumatic drive system comprises a clamping beam and an array arranged on the clamping beam as described in any one of claims 1 to 5.

7. A quick clamping system for a bending machine mold according to claim 6, characterized in that: The pneumatic drive systems are evenly distributed on the clamping beam in an array.

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