Quick change device for press ram

Abstract

The utility model discloses a quick replacement device of press head belongs to electric press technical field, in the device, the connecting base can be connected with the electric cylinder head part of electric press, and the connecting base connects zero point mounting flange and zero point quick unit in proper order, zero point mounting flange is connected with the outer bearing seat, and zero point mounting flange and the outer bearing seat can accommodate zero point quick unit, and the outer bearing seat is provided with bearing shaft sleeve, the press head assembly includes the press head and the press head positioning pin, and one end of press head is connected to zero point quick unit after penetrating bearing shaft sleeve, and zero point quick unit is used for realizing the clamping and loosening of press head, and the press head is fixed with zero point quick unit through the press head positioning pin, and the reaction force of press head is transmitted to the outer bearing seat through bearing shaft sleeve, and then is transmitted to the electric cylinder head part of electric press. The utility model avoids that zero point quick unit bears the working load directly, prolongs the service life, responds fast and crisp, reduces the cost, improves the space utilization and automation level.

Description

Technical Field

[0001] This utility model belongs to the field of electric press technology, specifically relating to a quick-change device for press heads. Background Technology

[0002] In the mechanical industry, the reference datum is generally referred to as the zero point or zero position. During machining or measurement, the zero point of the workpiece must first be determined, and then machining or measurement can be performed based on this zero point. However, during machining, parts often do not remain stationary; they need to be moved from one process to another, from one machine tool to another. Irregularly shaped parts are also difficult to calibrate the zero point, requiring the use of a dial indicator to recalibrate, resulting in significant downtime and reduced efficiency. A zero-point positioning system is a unique positioning and locking device that keeps the zero point constant while moving the workpiece from one station to another, from one process to another, or from one machine tool to another. This saves time spent recalibrating the zero point, ensures work continuity, and improves efficiency.

[0003] The zero-point quick-change design principle is based on the over-positioning principle of one-face, two-pin. Its advantage lies in the efficient integration of high-precision positioning and reliable clamping. Simply put, it establishes a standard interface between processes and between machine tools. It allows workpieces to be clamped once on the production line before undergoing multiple processing steps without needing to consider positioning issues. Whether it's a pallet, fixture, vise, or workpiece, using a zero-point clamping system allows for extremely rapid changes in position with a repeatability of ≤0.005mm, provided the zero point is determined. If more machine worktables are equipped with clamping plates, the tooling and fixtures on all equipment can be used more flexibly. Therefore, the application scenarios for zero-point quick-change are primarily at passive clamping points such as pallets, fixtures, and vises, and there is an urgent need to expand its application scenarios.

[0004] Electric presses are widely used in factory production. In dedicated or replacement production scenarios, electric presses rarely fail to switch pressure heads. However, with technological advancements and faster product updates, factories increasingly require electric presses for product changes and additional processes. Simultaneously, electric presses need to be equipped with corresponding pressure heads depending on the product, or additional pressing steps may be required. Existing electric presses cannot effectively and quickly change pressure heads, nor can they automatically grasp them, hindering rapid product or process changes. This increases the cost of purchasing production equipment, and the level of automation and reliability needs further improvement. Utility Model Content

[0005] This utility model provides a quick-change device for press heads, aiming to solve the problems of current electric presses, which cannot effectively and quickly change press heads, cannot automatically grab press heads, and are difficult to achieve quick production or process changes, thereby increasing the cost of production equipment procurement, and the automation level and reliability need to be further improved.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a quick-change device for a press head, comprising a device body, which includes a connecting base, a zero-point mounting flange, a zero-point quick-change unit, an outer bearing seat, a bearing bushing, and a press head assembly; wherein: The connecting base can be connected to the electric cylinder head of the electric press. One end of the zero-point mounting flange is connected to the connecting base, and the other end is connected to one end of the zero-point quick-change unit. The other end of the zero-point mounting flange is connected to an external bearing seat. The zero-point mounting flange and the external bearing seat form a receiving space that can accommodate the zero-point quick-change unit and transmit the pressing reaction force. The external bearing seat is equipped with a bearing bushing. The pressure head assembly includes a pressure head and a pressure head positioning pin. One end of the pressure head passes through the bearing bushing and is connected to the zero-point quick-change unit. The zero-point quick-change unit is used to clamp and release the pressure head. The pressure head is fixed to the zero-point quick-change unit by the pressure head positioning pin. When the pressure head is being pressed, the reaction force of the pressure head is transmitted to the outer bearing seat through the bearing bushing, and then to the electric cylinder head of the electric press.

[0007] In some embodiments, the pressure head has a stepped surface near the bearing sleeve, and the bearing sleeve extends radially from the stepped surface to form a bearing portion; the outer bearing seat has a recessed platform corresponding to the bearing portion to accommodate the bearing portion, so that the reaction force of the pressure head is transmitted to the bearing sleeve through the stepped surface and the bearing portion, and then to the outer bearing seat through the bearing portion and the recessed platform.

[0008] In some implementations, one end of the pressure head positioning pin is inserted into one end of the pressure head, and the other end is inserted into the center hole of the zero-point quick-change unit, and is clamped by the steel balls of the zero-point quick-change unit.

[0009] In some embodiments, one end of the connecting base is provided with a circular stop, which can be fitted with the electric cylinder head of the electric press; the inside of the circular stop is provided with a ring of countersunk screw holes, and the countersunk screws are fitted with the electric cylinder threaded holes of the electric cylinder head of the electric press.

[0010] In some implementations, the zero-point mounting flange and the connecting base are positioned by a stop and connected by countersunk screws.

[0011] In some implementations, the zero-point quick-change unit uses standard components and is equipped with a clamping / releasing position sensor. The zero-point quick-change unit is connected to an external air supply and two clamping / releasing signal lines, which are connected to the equipment control system.

[0012] Furthermore, the zero-point quick-change unit is loosened when air is supplied and clamped when no air is supplied; the clamping force of the zero-point quick-change unit is not less than 10kN.

[0013] Furthermore, the zero-point quick-change unit and the zero-point mounting flange are positioned by pins and fastened together by countersunk screws.

[0014] In some embodiments, the outer support base is a hollow structure, and the side of the outer support base has holes for connecting the air pipe and signal line of the zero-point quick-change unit.

[0015] In some implementations, the load-bearing bushing and the outer load-bearing seat are also connected by countersunk screws.

[0016] This utility model discloses a quick-change device for press heads, which has the following beneficial effects.

[0017] This utility model discloses a quick-change device for press heads. By providing a zero-point quick-change system with a clamping unit capable of rapidly changing the press head, it achieves rapid clamping and releasing of the press head. The action of the zero-point quick-change unit shortens changeover and mold-changing times, improving production efficiency. Through a reasonable force transmission path, the reaction force during pressing is transmitted to the electric cylinder body via the bearing bushing and outer bearing seat, preventing the zero-point quick-change unit from directly bearing the working load, thus protecting its high-precision positioning and clamping functions and extending its service life. The device consists of a connecting base, zero-point mounting flange, zero-point quick-change unit, outer bearing seat, bearing bushing, press head positioning pin, and press head assembly. The on / off switching of the zero-point quick-change system ensures the overall clamping and releasing of the press head, with a rapid and decisive response. Electric presses modified with the zero-point quick-change system significantly reduce equipment procurement costs, improve on-site space utilization, and enhance factory automation levels, demonstrating significant practical value in factory production. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0019] Figure 1 This is a cross-sectional structural schematic diagram of a quick-change device for a press head according to the present invention; Figure 2 This is an exploded schematic diagram of the rotating device in a quick-change device for a press head according to the present invention. Figure 3 This is an exploded view of the rotating device in a quick-change device for a press head according to this utility model, taken from another angle.

[0020] The attached diagram shows the following reference numerals: 1. Connecting base; 2. Zero-point mounting flange; 3. Zero-point quick-change unit; 4. External bearing seat; 5. Bearing bushing; 6. Pressure head positioning pin; 7. Pressure head. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] It should be noted that similar labels and letters in the following figures indicate similar items, and once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0024] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model 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, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0025] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0027] like Figures 1-3 As shown, this utility model discloses a quick-change device for a press head, comprising a device body, which includes a connecting base 1, a zero-point mounting flange 2, a zero-point quick-change unit 3, an outer bearing seat 4, a bearing bushing 5, and a press head assembly; wherein: The connecting base 1 can be connected to the electric cylinder head of the electric press. One end of the zero-point mounting flange 2 is connected to the connecting base 1, and the other end is connected to one end of the zero-point quick-change unit 3. The other end of the zero-point mounting flange 2 is connected to the outer bearing seat 4. The zero-point mounting flange 2 and the outer bearing seat 4 form a receiving space that can accommodate the zero-point quick-change unit 3 and transmit the pressing reaction force. The outer bearing seat 4 is equipped with a bearing bushing 5. The press head assembly of this utility model includes a press head 7 and a press head positioning pin 6. One end of the press head 7 passes through the bearing bushing 5 and is connected to the zero-point quick-change unit 3. The zero-point quick-change unit 3 is used to clamp and release the press head 7. The press head 7 is fixed to the zero-point quick-change unit 3 by the press head positioning pin 6. When the press head 7 is pressed, the reaction force of the press head 7 is transmitted to the outer bearing seat 4 through the bearing bushing 5, and then to the electric cylinder head of the electric press.

[0028] This utility model relates to a quick-change device for press heads. The zero-point quick-change unit is designed to handle only precise positioning and rapid clamping or loosening. The relatively large reaction force generated during pressing is transmitted sequentially through the press head 7, the bearing bushing 5, and the outer bearing seat 4 to the electric cylinder head of the electric press. This effectively protects the quick-change unit, ensuring its long-term, repetitive positioning accuracy and service life. With this device, the electric press can efficiently and decisively change press heads according to different products, improving changeover efficiency, reducing downtime, and achieving automatic gripping and replacement of press heads, thus increasing overall production efficiency.

[0029] In some embodiments, in the device of this invention, the pressure head 7 has a stepped surface near the bearing sleeve 5, and the bearing sleeve 5 extends radially from the stepped surface to form a bearing portion; the outer bearing seat 4 has a recessed platform corresponding to the bearing portion to accommodate the bearing portion, so that the reaction force of the pressure head 7 is transmitted to the bearing sleeve 5 through the stepped surface and the bearing portion, and then to the outer bearing seat 4 through the bearing portion and the recessed platform. This invention, through the cooperation of the stepped surface, the bearing portion, and the recessed platform, constructs a stable and reliable mechanical force transmission, capable of withstanding greater loads, avoiding stress concentration, and ensuring the stability of the device under frequent and high-load pressing operations.

[0030] Furthermore, in the device of this utility model, one end of the pressure head positioning pin 6 is inserted into one end of the pressure head 7 and the other end is inserted into the center hole of the zero-point quick-change unit 3. The pressure head positioning pin is fixed by the steel ball clamping mechanism of the zero-point quick-change unit 3. When released, it can quickly disengage, realizing quick replacement.

[0031] This invention features a circular stop at one end of the connecting base 1, which mates with the electric cylinder head of the electric press. Inside the circular stop is a ring of countersunk screw holes, which engage with the threaded holes in the electric cylinder head of the electric press. The load-bearing bushing 5 and the outer load-bearing seat 4 are also connected via countersunk screws. By employing a circular stop and countersunk screw connection, precise radial positioning is achieved firstly through the stop, ensuring alignment, and then the screws provide tightening, ensuring accurate power transmission from the electric cylinder to the entire replacement device.

[0032] In this invention, the zero-point mounting flange 2 and the connecting base 1 are positioned by a stop and connected by countersunk screws. The zero-point quick-change unit 3 and the zero-point mounting flange 2 are positioned by a pin and fastened by countersunk screws. This invention ensures coaxiality of the connection through stop positioning, and ensures circumferential accuracy between the zero-point quick-change unit 3 and the zero-point mounting flange 2 through pin positioning, preventing rotation. The countersunk screws provide tightening force, ensuring stable fixation of the connecting base 1, the zero-point mounting flange 2, and the zero-point quick-change unit 3.

[0033] In actual working conditions, the zero-point quick-change unit 3 of this utility model can use standard parts. The zero-point quick-change unit 3 is equipped with a clamping / releasing position sensor. The zero-point quick-change unit 3 is externally connected to one air supply and leads out two clamping / releasing signal lines, which are connected to the equipment control system. The built-in sensor and signal lines of the zero-point quick-change unit 3 allow the equipment control system to monitor the clamping and releasing states in real time. Furthermore, the zero-point quick-change unit 3 of this utility model releases when air is supplied and clamps when there is no air. The clamping force of the zero-point quick-change unit 3 is not less than 10kN. When the air supply is suddenly interrupted, the device will maintain the clamping state to prevent the pressure head 7 from accidentally falling off. The entire zero-point quick-change unit does not bear the reaction force transmitted from the pressure head 7, thus not affecting the service life of the zero-point quick-change unit and ensuring the reliability of the working process.

[0034] The external support base 4 of this utility model adopts a cavity structure. The side of the external support base 4 is provided with holes for connecting the air pipe and signal line of the zero-point quick-change unit 3. The cavity structure realizes the lightweight design. By reasonably arranging the openings on the side, the pipeline is protected from external interference and damage.

[0035] The following detailed description of a quick-change device for press heads according to the present invention will be provided through specific embodiments.

[0036] like Figures 1-3 As shown, the connecting base 1 connects to the head of the electric cylinder. The upper circular stop of the connecting base 1 matches the electric cylinder, and there is a ring of countersunk screw holes inside the stop. Countersunk screws are used to connect to the threaded holes of the electric cylinder. The zero-point mounting flange 2 connects to the connecting base 1. The connection between the zero-point mounting flange 2 and the connecting base 1 also has a stop for positioning, and countersunk screws are used to connect to the threaded holes of the electric cylinder. The zero-point quick-change unit 3 is a standard part, but can be selected according to requirements. However, it must have a built-in clamping / releasing position sensor. The zero-point quick-change unit 3 requires an external air supply and two clamping / releasing signal lines to connect to the equipment control system. The zero-point quick-change unit 3 releases when air is supplied and clamps when there is no air supply. The zero-point quick-change unit 3 connects to the zero-point mounting flange 2, using pin positioning and countersunk screws for fastening. The outer support seat 4 is the main load-bearing structure in the overall device. It is connected to the zero-point mounting flange 2 and has no mechanical contact with the zero-point quick-change unit 3. It has a relatively thick wall but is a hollow component, housing the zero-point quick-change unit 3 within its inner cavity. It has side openings for connecting the air pipes and signal lines of the zero-point quick-change unit 3. The load-bearing bushing 5 is a structural component that directly contacts the pressure head 7 and bears its reaction force. The load-bearing bushing 5 also ensures a smooth connection between the pressure head 7 and the zero-point quick-change unit. The load-bearing bushing 5 is connected to the outer support seat 4 using countersunk screws. The lower end of the pressure head positioning pin 6 has a threaded rod that connects to the threaded hole of the pressure head 7. The pressure head positioning pin 6 is inserted into the center hole of the zero-point quick-change unit, and the steel balls of the zero-point quick-change unit clamp the pressure head positioning pin 6.

[0037] The connecting base 1, zero-point mounting flange 2, and zero-point quick-change unit in this utility model device form a zero-point quick-change system. The clamping force applied by the electric cylinder of the electric press can reach 10kN, which is sufficient to clamp the press head 7. After being released by ventilation, it can be directly disengaged from the press head positioning pin 6, which is very fast and clean. If XY displacement is added to the electric press, it can even automatically grab the press head 7 for pressing. The zero-point quick-change system is only responsible for clamping and releasing and does not bear the reaction force transmitted by the press head 7 during pressing. Therefore, it will not cause damage to the zero-point quick-change system and the electric cylinder of the electric press. The reaction force is transmitted from the stepped surface of the press head 7 to the bearing bush 5, then to the outer bearing seat 4, and finally to the electric cylinder of the electric press. The press head can be quickly and manually or automatically changed, realizing rapid production change or adding new pressing processes, and ultimately achieving the purpose of saving equipment costs and reducing the footprint.

[0038] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Anyone skilled in the art can smoothly implement the present utility model according to the description and above. Any modifications, alterations, and equivalent changes made based on the disclosed technical content are equivalent embodiments of the present utility model. At the same time, any modifications, alterations, and equivalent changes made to the above embodiments based on the essential technology of the present utility model are still within the protection scope of the technical solution of the present utility model.

Claims

1. A quick-change device for a press head, characterized in that, The device body includes a connecting base (1), a zero-point mounting flange (2), a zero-point quick-change unit (3), an outer bearing seat (4), a bearing bushing (5), and a pressure head assembly; wherein: The connecting base (1) can be connected to the electric cylinder head of the electric press. One end of the zero-point mounting flange (2) is connected to the connecting base (1), and the other end is connected to one end of the zero-point quick-change unit (3). The other end of the zero-point mounting flange (2) is connected to an outer bearing seat (4). The zero-point mounting flange (2) and the outer bearing seat (4) form a accommodating space that can accommodate the zero-point quick-change unit (3) and transmit the pressing reaction force. The outer bearing seat (4) is equipped with a bearing bushing (5). The press head assembly includes a press head (7) and a press head positioning pin (6). One end of the press head (7) passes through the bearing bushing (5) and is connected to the zero-point quick-change unit (3). The zero-point quick-change unit (3) is used to clamp and release the press head (7). The press head (7) is fixed to the zero-point quick-change unit (3) by the press head positioning pin (6). When the press head (7) is pressed, the reaction force of the press head (7) is transmitted to the outer bearing seat (4) through the bearing bushing (5), and then to the electric cylinder head of the electric press.

2. The quick-change device for the press head according to claim 1, characterized in that, The pressure head (7) has a stepped surface near the bearing sleeve (5), and the bearing sleeve (5) extends radially from the stepped surface to form a bearing portion; the outer bearing seat (4) has a recessed platform corresponding to the bearing portion to accommodate the bearing portion, so that the reaction force of the pressure head (7) is transmitted to the bearing sleeve (5) through the stepped surface and the bearing portion, and then to the outer bearing seat (4) through the bearing portion and the recessed platform.

3. The quick-change device for the press head according to claim 1, characterized in that, One end of the pressure head positioning pin (6) is inserted into one end of the pressure head (7), and the other end is inserted into the center hole of the zero point quick-change unit (3), and is clamped by the steel ball of the zero point quick-change unit (3).

4. The quick-change device for the press head according to claim 1, characterized in that, One end of the connecting base (1) is provided with a circular stop, which can be assembled with the electric cylinder head of the electric press; a ring of countersunk screw holes is provided inside the circular stop, and the countersunk screws are connected with the electric cylinder thread hole of the electric cylinder head of the electric press.

5. The quick-change device for the press head according to claim 1, characterized in that, The zero-point mounting flange (2) and the connecting base (1) are positioned by a stop and connected by countersunk screws.

6. The quick-change device for the press head according to claim 1, characterized in that, The zero-point quick-change unit (3) adopts standard parts and is equipped with a clamping and releasing position sensor. The zero-point quick-change unit (3) is connected to an external air supply and two clamping and releasing signal lines are led out to connect to the equipment control system.

7. The quick-change device for the press head according to claim 6, characterized in that, The zero-point quick-change unit (3) is loosened when air is supplied and clamped when there is no air; the clamping force of the zero-point quick-change unit (3) is not less than 10kN.

8. The quick-change device for the press head according to claim 6, characterized in that, The zero-point quick-change unit (3) and the zero-point mounting flange (2) are positioned by pins and fastened together by countersunk screws.

9. The quick-change device for the press head according to claim 1, characterized in that, The outer support base (4) is a hollow structure, and the side of the outer support base (4) is provided with holes for connecting the air pipe and signal line of the zero-point quick-change unit (3).

10. The quick-change device for the press head according to claim 1, characterized in that, The bearing bush (5) and the outer bearing seat (4) are also connected by countersunk screws.

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