A floating worktable punch press

Abstract

The application discloses a floating workbench punch press, comprising: a machine body; a stamping mechanism installed on the machine body to apply load to a workpiece; an overload protection device assembled on the machine body and provided with at least one support area; a workbench for containing the workpiece to support the workpiece under pressure and installed on the support area; a guide mechanism connected with the machine body to limit the workbench to move in a given direction; when the load applied to the workpiece by the stamping mechanism and transmitted by the workpiece is greater than a set threshold, the support area is caused to move, so that the load applied to the workpiece always does not exceed the set threshold. By arranging the overload protection device and the guide mechanism under the workbench, the installation is simple and reliable, the purpose of overload protection can be met, meanwhile, the weight of the stamping mechanism and other operating components is reduced, the energy consumption of the equipment is reduced, the height of the stamping slide and the height of the equipment can be effectively reduced, the structure is simple and compact, the gravity center of the equipment is moved downward, the ability to bear the eccentric load is strong, and the structural stability is better.

Description

Technical Field

[0001] This invention belongs to the field of punch press technology, specifically, it relates to a floating worktable punch press. Background Technology

[0002] A traditional punch press mainly consists of a machine body, crankshaft, rocker arm assembly, slide block assembly, and overload protection device. The overload protection device comprises a plunger rod and a cylinder. The cylinder is fixed to the slide block assembly, and the rocker arm assembly directly presses against the plunger rod. The rocker arm assembly is fitted inside the crankshaft, which is directly fixed to the machine body. When the punch press presses down, the crankshaft drives the rocker arm assembly downwards, which in turn pushes the plunger rod. The plunger rod, through pressurized hydraulic fluid, transmits the force to the cylinder, which in turn acts on the slide block assembly, ultimately achieving pressing. When the punch press returns, the crankshaft drives the rocker arm assembly upwards, which then directly pulls the slide block assembly to complete the return motion. This cycle repeats continuously, completing the continuous operation of the punch press. During the pressing process, if the force transmitted by the rocker arm assembly exceeds the nominal load of the equipment, the overload protection device will promptly release pressure, ensuring that the equipment always meets the required nominal load.

[0003] While traditional punch presses can guarantee the required pressing force, their internal structure, particularly the overload protection device, is quite complex, making disassembly and assembly difficult. Furthermore, due to the integrated overload protection device, the pressing motion components are heavy and energy-intensive. Therefore, this invention is proposed. Summary of the Invention

[0004] The technical problem to be solved by this invention is to overcome the shortcomings of the prior art and provide a floating worktable punch press. To solve the above technical problem, the basic concept of the technical solution adopted by this invention is as follows:

[0005] A floating table punch press, comprising:

[0006] body;

[0007] A stamping mechanism, mounted on the machine body, applies a load to the workpiece;

[0008] An overload protection device is mounted on the machine body and has at least one support area.

[0009] A workbench, which holds the workpiece to support it under pressure, is mounted on the support area;

[0010] A guiding mechanism, connected to the machine body, restricts the worktable to move only in a given direction;

[0011] When the load applied by the stamping mechanism to the worktable by the workpiece exceeds a set threshold, the support area causes the worktable to move along the direction defined by the guide mechanism, so that the load on the workpiece never exceeds the set threshold.

[0012] Furthermore, the support domain includes at least a closed loop or several interconnected support points / segments connected to the overload relief device.

[0013] Furthermore, the closed loop is a single loop, the geometric center of which is located on or near the center of gravity of the worktable; the geometric center of the geometric figure formed by the sequential connection of several connected support points / segments is located on or near the center of gravity of the worktable.

[0014] Furthermore, the closed loop consists of several loops, and the centroid of the geometric figure formed by the sequential connection of the centroids of the several closed loops is located on or near the center of gravity axis of the worktable.

[0015] Furthermore, the closed loop can be rectangular, square, circular, or elliptical.

[0016] Furthermore, the support domain includes several interconnected support points connected to the overload relief device, and the several interconnected support points are arranged in an array or in an axisymmetric distribution in the circumferential direction.

[0017] Furthermore, the support domain includes several interconnected support sections connected to the overload relief device, and the several interconnected support sections are arranged in an array in the circumferential direction or in an axisymmetric distribution.

[0018] Furthermore, there are four support points, arranged in a rectangular pattern, with each support point located at one of the four corners of the rectangle.

[0019] Furthermore, there are two support segments, both of which are straight segments and are axially symmetrically distributed.

[0020] Furthermore, the closed loop includes a strut and a pressure plate. The strut consists of a piston and a rod body. The piston is connected to the rod body. The machine body has a groove. The piston is installed in the groove and slides with the groove, and the two are sealed together. A high-pressure oil chamber is formed between the piston and the bottom wall of the groove. The high-pressure oil chamber is connected to an overload pressure relief device. The machine body has a slot for installing the pressure plate. The pressure plate is installed in the slot to limit the movement of the piston and slides with the rod body.

[0021] Furthermore, the guiding mechanism includes a guide post and a post hole. The guide post is installed on the bottom surface of the worktable, and the post hole is located on the machine body and is slidably connected to the guide post.

[0022] Furthermore, the stamping mechanism includes a crankshaft, a rocker arm, and a slider. The crankshaft is mounted on the machine body and is driven by the rocker arm device. The rocker arm is connected to the slider. During operation, the crankshaft drives the rocker arm device to move, which in turn pushes the slider to move, thereby pressing the mold or workpiece.

[0023] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art.

[0024] By installing an overload protection device and a guiding mechanism under the workbench, the installation is simple and reliable. It can not only meet the purpose of overload protection, but also reduce the weight of the stamping mechanism and other operating parts, thus reducing the energy consumption of the equipment.

[0025] The crankshaft rocker arm device is directly connected to the slider, which simplifies the connection structure between the crankshaft, rocker arm device and slider. It can effectively reduce the height of the stamping slider and the height of the equipment. The structure is simple and compact, and the center of gravity of the equipment moves downward, which has a strong ability to resist off-center loads and better structural stability.

[0026] The guide mechanism ensures stable installation and movement of the worktable, provides excellent resistance to off-center loads, and effectively guarantees the machining accuracy of the parts.

[0027] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0028] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments and descriptions of the invention are used to explain the invention, but do not constitute an undue limitation of the invention. Obviously, the drawings described below are merely some embodiments, and those skilled in the art can obtain other drawings based on these drawings without creative effort. In the drawings:

[0029] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the assembly of the overload protection device of the present invention;

[0031] Figure 3 This is a schematic diagram of the rectangular closed loop arrangement of the present invention;

[0032] Figure 4 This is a schematic diagram of the elliptical closed loop arrangement of the present invention;

[0033] Figure 5 This is a schematic diagram of the support section arrangement of the present invention;

[0034] Figure 6 This is a schematic diagram of the support point arrangement of the present invention;

[0035] Figure 7 This is a schematic diagram of the cross-sectional structure of the closed loop of the present invention;

[0036] Figure 8 This is a schematic diagram of the guide post and post hole structure of the present invention;

[0037] Figure 9 This is a schematic diagram of the stamping mechanism of the present invention.

[0038] In the diagram: 1-Main body; 2-Stamping mechanism; 3-Worktable; 4-Support area; 5-Overload pressure relief device; 11-Column hole; 21-Crankshaft; 22-Swing rod; 23-Slider; 31-Guide column; 41-Rectangular closed loop; 42-Elliptical closed loop; 43-Support section; 44-Support point; 401-Strut; 402-Pressure plate; 403-High-pressure oil chamber; 404-Sealing ring.

[0039] It should be noted that these accompanying drawings and textual descriptions are not intended to limit the scope of the invention in any way, but rather to illustrate the concept of the invention to those skilled in the art by referring to specific embodiments. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0041] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] like Figures 1 to 9 As shown, the floating table punch press of the present invention includes:

[0044] Fuselage 1;

[0045] The stamping mechanism 2 is installed on the machine body 1 and applies a load to the workpiece;

[0046] An overload protection device is mounted on the fuselage 1 and has at least one support area;

[0047] Workbench 3, which holds the workpiece to support it under pressure, is installed on the support area;

[0048] The guiding mechanism is connected to the fuselage 1 to restrict the workbench 3 to move only in a given direction;

[0049] When the load applied by the stamping mechanism 2 transmitted by the workpiece to the workbench 3 is greater than the set threshold value, it causes the support area to move the workbench 3 along the direction defined by the guiding mechanism, so that the load received by the workpiece never exceeds the set threshold value.

[0050] Specifically, the stamping mechanism 2 is mainly a component for applying pressure and additional pressure, installed on the fuselage 1, and can be in the forms of hydraulic drive, pneumatic drive, motor drive, etc. Refer to the appendix Figure 9 which shows a driving structure. The stamping mechanism 2 includes a crankshaft 21, a swing rod 22, and a slider 23. The crankshaft 21 is installed on the fuselage 1, the crankshaft 21 is drivingly connected to the swing rod 22 device, the swing rod 22 is connected to the slider 23. During operation, the crankshaft 21 drives the swing rod 22 device to move, and then pushes the slider 23 to move to press the die or the workpiece.

[0051] The support area mentioned here is a general term, and can be in the forms of a support surface, several support surfaces, several support points 44 or support segments 43, etc. The purpose is to support the workbench 3 and provide a reverse support force for the workbench 3 when the workbench 3 is under pressure. Before use, place the workpiece on the workbench 3 and start the stamping mechanism 2. The pressure will be transmitted to the workbench 3 through the workpiece, and the workbench 3 will transmit the pressure to the support area. That is, at the final force balance: the pressure of the stamping mechanism 2 is equal to the reverse support force of the support area. The set threshold value mentioned here is the maximum designed compression value of the workpiece. During the process of the workbench 3 being under pressure, when its pressure is greater than the set threshold value, it will force the support area to move. When the support area moves, the reverse support force it provides will not be greater than the set threshold value. In this way, it can be ensured that the pressure received by the workpiece never exceeds the set threshold value. Assume that the pressure applied by the stamping mechanism 2 is Fn, the set threshold value is Fo, and the reverse support force of the support area is Fm. Then there will be the following three force conditions:

[0052] The first: When Fn < Fo, Fm = Fn < Fo;

[0053] The second: When Fn = Fo, Fm = Fn = Fo;

[0054] The third: When Fn > Fo, Fm = Fo < Fn.

[0055] In the above first and second states, the load received by the workpiece never exceeds the set threshold value. In the third state, the reason why the pressure on the workpiece does not exceed the set threshold value is the result of the movement of the support area. The support area moves along the direction defined by the guiding mechanism, reducing the magnitude of the reverse support force. According to the principle of action and reaction, the load received by the workpiece will not exceed the reverse support force, that is, will not exceed the set threshold value.

[0056] The guiding mechanism guides and limits the movement of the worktable 3, ensuring that the platform can only move in a specified direction and improving the worktable 3's resistance to off-center loads. The structure of the guiding mechanism can be customized according to requirements; one embodiment is provided here. The guiding mechanism includes guide posts 31 and post holes 11. The guide posts 31 are mounted on the bottom surface of the worktable 3, and the post holes 11 are located on the machine body 1 and are slidably connected to the guide posts 31. The guide posts 31 extend from the bottom surface of the worktable 3 outwards. The post holes 11 on the machine body 1 match the guide posts 31, allowing the guide posts 31 to slide within the post holes 11. When the worktable 3 is installed or subjected to pressure, the cooperation between the guide posts 31 and the post holes 11 guides the movement of the worktable 3, ensuring that the worktable 3 does not deviate from its position, thereby improving its resistance to off-center loads and effectively guaranteeing the machining accuracy of the workpiece. The number of guide pillars 31 and pillar holes 11 can be set according to requirements. It is preferable to set two guide pillars 31 and pillar holes 11, respectively set on both sides of the worktable 3. Since two points form a line segment, these two sets of limiters can meet the setting purpose of the guiding mechanism.

[0057] The support domain here includes at least one closed loop or several interconnected support points / segments connected to the overload relief device 5. Specifically, the support domain includes at least one closed loop, several interconnected support points, or several interconnected support segments. The closed loop is connected to the overload relief device 5, and the support points are interconnected and connected to the overload relief device 5. Similarly, the support segments are interconnected and connected to the overload relief device 5. The overload relief device 5 is existing technology, primarily based on the principle of hydraulic oil pressure relief, and will not be elaborated upon here. The closed loop provides a ring-shaped support, and after connecting to the overload relief device 5, it ensures consistent pressure throughout the loop. The presence of several interconnected support points 44 and support segments 43 also ensures consistent pressure at each support point 44 and support segment 43. This configuration ensures the same support force is provided to the worktable 3.

[0058] Preferably, if the support domain includes a closed loop, the geometric centroid of that closed loop is located on or near the center of gravity axis of the worktable 3; if it includes multiple closed loops, each closed loop has a centroid, and the multiple loops have a total of multiple centroids. These multiple centroids are connected sequentially to form a geometric figure, the centroid of which is located on or near the center of gravity axis of the worktable 3. This arrangement ensures that the worktable 3 can be stably supported regardless of the number of closed loops. The centroid of the geometric figure formed by connecting several connected support points / segments end to end is located on or near the center of gravity axis of the worktable 3. The advantage of having the geometric centroid located on or near the center of gravity axis is more stable support, avoiding the problem of uneven reverse support force provided by the support domain when the worktable 3 is under pressure due to support eccentricity.

[0059] Closed loops can be rectangular, square, circular, or elliptical. See appendix. Figure 3 , 4 The diagram shows a rectangular closed loop 41 and an elliptical closed loop 42, each closed loop including a strut 401 and a pressure plate 402, in conjunction with an attached... Figure 7 The support rod 401 consists of a piston and a rod body. The piston is connected to the rod body. The machine body 1 has a groove, and the piston is installed in the groove, slidingly engaging with the groove and forming a sealed connection. A sealing ring 404 can be installed at the connection point. A high-pressure oil chamber 403 is formed between the piston and the bottom wall of the groove. The high-pressure oil chamber 403 is connected to the overload relief device 5. The machine body 1 has a slot for installing a pressure plate 402. The pressure plate 402 is installed in the slot to limit the movement of the piston and slides with the rod body. The high-pressure oil chamber 403 provides a stable supporting force to ensure that the rod body of the support rod 401 stably supports the worktable 3. When the support area moves, i.e., when pressure is released, the high-pressure oil chamber 403 will release pressure, and the piston will move in the groove, thereby moving the support rod 401 and realizing the movement of the support area. Here, the high-pressure oil chamber 403 is a closed annular groove. An oil outlet can be provided on the side of the machine body 1, and the oil outlet can be connected to the overload relief device 5.

[0060] Of course, the support domain can also consist of several connected support points 44 and support segments 43. (See attached diagram.) Figure 5 The support domain includes several interconnected support sections 43 connected to the overload relief device 5. These interconnected support sections 43 are arranged in an array or axially symmetrically in the circumferential direction. Figure 5 The diagram shows two support segments 43, both of which are straight lines, located on opposite sides in a symmetrical arrangement. (See attached diagram.) Figure 6 The support domain includes a plurality of interconnected support points 44 connected to the overload relief device 5. These interconnected support points 44 are arranged in an array or axially symmetrically in the circumferential direction. Figure 6 The shown support points 44 are four in number, arranged in a rectangle, with each support point 44 located at one of the four corners of the rectangle. Whether using a closed loop, several connected support segments 43, or support points 44, the purpose is the same: to provide a stable and isobaric support force for the worktable 3.

[0061] The structure of the support section 43 or the support point 44 can also refer to the aforementioned closed loop structure. Both use components such as the strut 401 and the pressure plate 402 to cooperate with the groove of the body 1 to form a high-pressure oil chamber 403, thereby realizing the movement of the piston of the strut 401 and achieving the purpose of moving the support area.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-described technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A floating table punch press characterized by, The utility model relates to a stamping machine, comprising: a machine body (1); a stamping mechanism (2) mounted on the machine body (1) to apply a load to a workpiece; an overload protection device mounted on the machine body (1) and provided with at least one support area (4); a workbench (3) for containing the workpiece to support the workpiece under pressure and mounted on the support area (4), the support area (4) providing a counter-support force for the workbench (3) when the workbench (3) is under pressure, the support area (4) comprising at least one closed loop or a plurality of connected support points (44) or a plurality of connected support sections (43) connected to the overload relief device (5), the closed loop being able to provide a ring-shaped support, and the connected overload relief device (5) being able to ensure that the pressure in the entire loop is consistent and that the pressure in each support point (44) or support section (43) is also consistent, thereby reducing the weight of the operating components of the stamping mechanism and reducing the energy consumption of the equipment; a guide mechanism connected to the machine body (1) to limit the movement of the workbench (3) to a given direction; when the load applied to the workbench (3) by the stamping mechanism (2) through the workpiece is greater than a set threshold, the support area (4) moves along the direction defined by the guide mechanism with the workbench (3) to ensure that the load applied to the workpiece does not exceed the set threshold.

2. A floating bed punch press as defined in claim 1 wherein: The closed loop is one, and the geometric center of the closed loop is located on or near the center of gravity axis of the workbench (3); the geometric center of the geometric figure composed of the plurality of connected support points or the plurality of connected support sections is located on or near the center of gravity axis of the workbench (3).

3. A floating bed punch press as defined in claim 1 wherein: The closed loop is multiple, and the geometric center of the geometric figure composed of the multiple closed loops is located on or near the center of gravity axis of the workbench (3).

4. A floating bed punch press as defined in claim 2 wherein: The support area (4) comprises a plurality of connected support points (44) connected to the overload relief device (5), and the plurality of connected support points (44) are arranged in an array or in axial symmetry in the circumferential direction.

5. A floating bed punch press as defined in claim 2 wherein: The support area (4) comprises a plurality of connected support sections (43) connected to the overload relief device (5), and the plurality of connected support sections (43) are arranged in an array or in axial symmetry in the circumferential direction.

6. A floating bed punch press as defined in claim 4 wherein: The support area (4) comprises four support points (44) arranged in a rectangular shape, and the four support points (44) are located at the four corners of the rectangle, respectively.

7. A floating bed punch press as defined in claim 5 wherein: The support area (4) comprises two support sections (43), both of which are straight sections and are arranged in axial symmetry.

8. A floating table punch press as claimed in any one of claims 1 to 3 wherein: The closed loop comprises a support rod (401) and a pressing plate (402), the support rod (401) is composed of a piston and a rod body, the piston is connected to the rod body, the machine body (1) is provided with a groove, the piston is installed in the groove and is in telescopic sliding fit with the groove, and the piston and the groove are sealingly connected, a high-pressure oil cavity (403) is formed between the piston and the bottom wall of the groove, the high-pressure oil cavity (403) is connected to the overload relief device (5), the machine body (1) is provided with a slot for installing the pressing plate (402), and the pressing plate (402) is installed in the slot to limit the movement of the piston and is in sliding fit with the rod body.

9. A floating table punch press according to claim 1 wherein: The guide mechanism comprises a guide column (31) and a column hole (11), the guide column (31) is installed on the bottom surface of the workbench (3), and the column hole (11) is arranged on the fuselage (1) and is matched with the guide column (31) in sliding connection.

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