Punching machine punch ejector device and ejecting method

Abstract

The application discloses a punch head ejection device and ejection method of a puncher, and belongs to the technical field of punchers. The hands of an operator do not need to enter a stamping area, the risk of collision and hand squeezing of personnel is avoided, safety is improved, and the whole die does not need to be ejected, work efficiency is improved. The ejection device comprises a main body part and an operation part. When the ejection device is installed on the puncher, the main body part is located in the stamping area. The main body part comprises a base plate, an ejection piece and a locking piece, and the ejection piece is arranged on the first surface of the base plate. The locking piece is movably arranged on the base plate, and when the locking piece is in a locking state, the locking piece locks and limits the base plate and the die base. When the ejection device is installed on the puncher, one end of the operation part is connected with the locking piece, and the other end of the operation part extends to the outside of the stamping area and is used for external operation, so as to drive the locking piece to switch between the locking state and the opening state.

Description

Technical Field

[0001] This application belongs to the field of punching machine technology, and particularly relates to a punch ejection device and ejection method for a punching machine. Background Technology

[0002] Automatic punching machines are used to punch granules from silicon steel samples to prepare nitrogen value analysis samples. The hydraulic punches often break and become stuck in the mold due to foreign objects, wear, or sample adhesion. The punch stroke is only about 30mm, making it impossible for conventional ejection tools to reach the mold. Improper on-site handling can easily damage the mold and pose risks of personnel injury and hand crushing. Traditional methods require ejecting the entire mold, taking over 2 hours, interrupting nitrogen value analysis and affecting smelting control. Summary of the Invention

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, this application proposes a punch ejection device and ejection method for a punching machine, which eliminates the need for operators to enter the punching area, avoiding the risk of personnel bumping or pinching their hands, thereby improving safety. In addition, it eliminates the need to eject the entire die, thereby improving work efficiency.

[0004] The first aspect of this application provides a punch ejection device for a punching machine, wherein a punching area is formed between the die base of the punching machine and the punch of the punching machine, and the ejection device includes: The main body, when the ejector device is installed on the punching machine, is located within the punching area; the main body includes a base plate, an ejector, and a locking member; the ejector is disposed on a first surface of the base plate, the ejector is used to abut against the punch, and after abutting, drives the punch to move to eject the punch from the punch support; the locking member is movably disposed on the base plate, the locking member has a locked state and an open state; when the locking member is in the locked state, the locking member locks and limits the base plate to the mold base; The operating part, when the ejector device is installed on the punching machine, has one end connected to the locking member and the other end extending to the outside of the punching area for external operation to drive the locking member to switch between the locked state and the open state.

[0005] In some embodiments, the locking member includes a locking body, a first deformable portion, and a second deformable portion. The locking body is an annular body and has a first end and a second end disposed opposite to each other. The first deformable portion is disposed at the first end, and the second deformable portion is disposed at the second end. The locking body is movably disposed on the substrate. The operating part includes a threaded rod, a pushing member, an elastic member, and a locking drive member. One end of the threaded rod is connected to the first deformable part, and the other end of the threaded rod passes through the second deformable part and extends away from the second deformable part. Along the direction from the first deformed portion to the second deformed portion, the pushing member, the elastic member, and the locking drive member are sequentially sleeved on the threaded rod, and the pushing member, the elastic member, and the locking drive member are all disposed on the side of the second deformed portion away from the first deformed portion; The locking drive is located outside the stamping area.

[0006] In some embodiments, the first deformable portion and the second deformable portion are used to move closer to each other when the locking drive is turned to tighten the locking body, or to move further apart when the locking drive is turned to loosen the locking body.

[0007] In some embodiments, an installation groove is provided on the inner wall of the locking body, and an elastic washer is provided in the installation groove.

[0008] In some embodiments, the elastic washer protrudes from the inner wall surface of the locking body.

[0009] In some embodiments, the punch ejection device of the punching machine further includes a positioning member disposed on a second surface of the substrate, the second surface being disposed opposite to the first surface; The positioning member is used to position and cooperate with the mold base to position the substrate at a preset position on the mold base; when the substrate is positioned at the preset position, the ejector member corresponds to the position of the punch.

[0010] In some embodiments, the mold base is provided with a plurality of guide holes, and the side of the base plate on which the positioning member is disposed is provided with positioning grooves corresponding to the guide holes one by one; The positioning element includes multiple positioning rods, one end of which is disposed in the corresponding positioning groove; the other end of which is used to insert into the guide hole at the corresponding position to position the substrate at the preset position. In some embodiments, an ejector groove is provided on the side of the substrate where the ejector is disposed; The ejector includes a plurality of ejector rods, one end of which is disposed in the corresponding ejector groove, and the other end of which is used to abut against the punch.

[0011] In some embodiments, the ejector rod is detachably connected to the substrate.

[0012] A second aspect of this application provides a punch ejection method for a punching machine, applied to the punch ejection device of the punching machine described in the first aspect. The punch ejection device further includes multiple pressure sensors and a controller. The controller is electrically connected to a driver of the mold base and the multiple pressure sensors, respectively. The driver is used to drive the mold base to move towards the punch. Each pressure sensor is disposed on a corresponding ejection rod and is used to detect the pressure value received by the corresponding ejection rod. The punch ejection method includes: Obtain the current position information of the punch to be ejected; Based on the location information, determine the target pressure sensor corresponding to the current punch to be ejected from each of the pressure sensors; Obtain the pressure values ​​detected by each of the pressure sensors; If the pressure value fed back by the target pressure sensor is greater than the preset pressure threshold, and the pressure values ​​fed back by the other pressure sensors are not greater than the preset pressure threshold, the actuator is controlled to operate.

[0013] In use, the ejector device of this application first connects the operating part, the base plate, the ejector, and the locking part. At this time, the operating part is locked and limited to the base plate by the locking part. The entire punch ejector device is then fed into the stamping area via the operating part. When the ejector device is installed on a punching machine, the main body is located in the stamping area, one end of the operating part is connected to the locking part, and the other end extends to the outside of the stamping area. Therefore, the operator's hands do not need to enter the stamping area during the feeding process. After the base plate is placed on the mold base, the locking part is released, causing the base plate and the mold base to fit together. The other end of the operating part is operated from outside the stamping area, locking and limiting the base plate to the mold base. At this time, the ejector faces the punch. Then, the mold base is driven to move towards the punch, carrying the base plate and the ejector, so that the ejector abuts against the punch. After abutment, the punch is driven to move, ejecting the punch from the mold. The entire process does not require hammering, thus minimizing damage to the mold. It also eliminates the need for operators to put their hands into the stamping area, avoiding the risk of bumps and pinching, thereby improving safety. Furthermore, it eliminates the need to eject the entire mold, thus improving work efficiency. Attached Figure Description

[0014] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic overall view of a punching machine provided in one or more embodiments of this application; Figure 2 This is a schematic overall view of a punch ejection device for a punching machine provided in one or more embodiments of this application; Figure 3This is a schematic exploded view of a punch ejection device for a punching machine provided in one or more embodiments of this application; Figure 4 This is a schematic diagram showing the positional relationship between the punch ejection device of a punching machine and the mold base provided in one or more embodiments of this application; Figure 5 This is a schematic structural diagram of the locking member and operating part provided in one or more embodiments of this application; Figure 6 This is a schematic flowchart of a punch ejection method for a punching machine provided in one or more embodiments of this application. Detailed Implementation

[0015] To better understand the technical solutions provided in the embodiments of this specification, the technical solutions of the embodiments of this specification will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0016] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, the requirement defined by the phrase "comprising one..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes said element. The term "two or more" includes two or more cases.

[0017] Automatic punching machines are used to punch granules from silicon steel samples to prepare nitrogen value analysis samples. The hydraulic punches often break and become stuck in the mold due to foreign objects, wear, or sample adhesion. The punch stroke is only about 30mm, making it impossible for conventional ejection tools to reach the mold. Improper on-site handling can easily damage the mold and pose risks of personnel injury and hand crushing. Traditional methods require ejecting the entire mold, taking over 2 hours, interrupting nitrogen value analysis and affecting smelting control.

[0018] In view of this, the present application provides a punch ejection device and ejection method for a punching machine, which eliminates the need for operators to enter the punching area, avoiding the risk of personnel bumping or getting their hands pinched, thereby improving safety. In addition, it eliminates the need to eject the entire mold, thereby improving work efficiency.

[0019] like Figure 1 As shown, the punching machine of this application includes a mold base 1000 and a punching machine, on which a punch 2000 is mounted. If the punch 2000 becomes stuck in the punch mounting seat due to a foreign object, a stamping area M is formed between the mold base 1000 and the punch 2000. The stamping area M is narrow, therefore, if the punch 2000 becomes stuck, it is not easy to remove the punch 2000.

[0020] like Figure 2 and Figure 3 As shown, the punch ejection device of the punching machine of this application includes a main body 100 and an operating part 200.

[0021] The main body 100 is located within the stamping area M when the ejector is mounted on the punching machine. The main body 100 includes a base plate 110, an ejector 120, and a locking member 130. The base plate 110 serves as the supporting foundation for the entire ejector and is made of high-strength steel plate to ensure that it is not easily bent or deformed when subjected to the ejection reaction force of the punch. The shape of the base plate 110 is adapted to the shape of the mold base and can be a rectangular or circular plate.

[0022] Ejector 120 is disposed on the first surface of substrate 110 (i.e., the side of substrate 110 facing punch 2000). Ejector 120 is used to abut against punch 2000 and drive punch 2000 to move after abutment, so as to eject punch 2000 from punch support (not shown in the figure; before ejecting the punch, components such as spring return device on top of the punch need to be removed, and then the punch is ejected from the punch support by the ejection device, and finally the punch is removed from the punch support). The height of ejector 120 is determined according to the stroke that punch 2000 needs to be ejected. Usually, the height of ejector 120 is greater than the depth of punch 2000 embedded in punch support to ensure that punch 2000 can completely disengage from punch support during ejection.

[0023] The locking member 130 is movably disposed on the base plate 110. The locking member 130 has a locked state and an open state. When the locking member 130 is in the locked state, it locks and limits the base plate 110 to the mold base 1000, preventing the base plate 110 from shifting or falling off during ejection; when the locking member 130 is in the open state, the base plate 110 can be removed from the mold base 1000. The locking member 130 can be mounted on the base plate by a movable connection (such as a hinge, sliding connection, or threaded connection) to switch between the two states.

[0024] One end of the operating part 200 is connected to the locking member 130, and the other end of the operating part 200 is a free end. The operating part 200 can be a rod-shaped, handle-shaped, or pull-ring-shaped structure. The length of the operating part 200 needs to allow its end to extend out of the stamping area, so that the operator can operate it without entering the stamping area M. The connection between the operating part 200 and the locking member 130 can be a fixed connection (such as welding or threaded fastening) or a movable connection (such as hinge or snap-fit).

[0025] The punch ejection device for a punching machine provided in this application first undergoes an assembly operation: the operating part 200, the base plate 110, the ejector 120, and the locking member 130 are connected and assembled. At this time, the operating part 200 is locked and limited to the base plate 110 by the locking member 130, that is, the operating part 200 and the base plate 110 form an integral assembly. In this state, the operator holds the operating part 200 and uses the operating part 200 to feed the entire punch ejection device into the punching area M. Since the length of the operating part 200 is sufficient for one end to extend outside the punching area, the operator's hand is always outside the punching area during the feeding process and does not need to reach into the punching area.

[0026] After the ejector device feeds the substrate 110 into the stamping area M, it places the substrate 110 on the mold base 1000, as follows. Figure 4 As shown, after the substrate 110 is placed in position, the operator operates the other end (i.e., the free end) of the operating part 200 outside the stamping area M, driving the locking member 130 from the locked state to the open state, so that the locking member 130 releases its locking limit on the substrate 110. At this time, the substrate 110 can fully fit against the mold base 1000. After the substrate 110 fits against the mold base 1000, the operator continues to operate the other end of the operating part 200 outside the stamping area M, driving the locking member 130 from the open state back to the locked state, so that the locking member 130 locks and limits the substrate 110 against the mold base, and the substrate 110 is reliably fixed on the mold base 1000. At this time, the ejector 120 on the substrate 110 faces the punch 2000, and the position of the ejector 120 corresponds to that of the punch 2000.

[0027] After the substrate 110 is fixed, the drive mechanism of the punching machine is activated, driving the mold base 1000 to move towards the punch 2000, carrying the substrate 110 and the ejector 120. As the mold base 1000 moves, the ejector 120 gradually approaches the punch 2000 until it abuts against the punch 2000. The mold base 1000 continues to move towards the punch 2000, and the ejector 120 drives the punch 2000 to move relative to the punch support, gradually ejecting the punch 2000 from the punch support. When the punch 2000 is ejected to a preset position, the drive of the mold base 1000 is stopped, completing the punch ejection operation. After ejection, the punch 2000 is also away from the stamping area M, so the process of removing the punch 2000 does not require the operator's hands to enter the stamping area.

[0028] In this embodiment, the operator's hands do not need to enter the stamping area during the entire punch ejection process, fundamentally eliminating the safety hazards such as bumps and squeezing that may be caused by the operator's hands entering the stamping area, and significantly improving operational safety. Furthermore, this application achieves ejection by moving the base plate 110 and ejector 120 towards the punch via the mold base 1000. The ejection force is stable, continuous, and controllable, completely avoiding the impact load caused by hammering operations. Hammering operations easily generate localized impact stress on the punch and mold, leading to punch bending deformation, indentation or cracking of the mold inner wall. This application uses a stable mechanical drive ejection method, with the ejection force evenly transmitted along the punch axis, preventing impact damage to the mold and punch, thereby effectively protecting the precision and service life of the mold and punch.

[0029] Furthermore, this application moves the mold base, along with the base plate 110 and the ejector 120, toward the punch by driving the mold base to eject only the specific punch that needs to be replaced or repaired from the mold, without having to disassemble and eject the entire mold (including all punches) from the mold base. In traditional operations, when a punch needs to be replaced, the entire mold often needs to be removed from the equipment for separation, which is cumbersome and time-consuming. This application achieves selective ejection of individual punches, significantly reducing unnecessary disassembly and assembly work, and significantly shortening downtime for punch replacement or maintenance, thereby effectively improving work efficiency.

[0030] In some embodiments, such as Figure 5As shown, the locking component includes a locking body 131, a first deformable portion 132, and a second deformable portion 133. The locking body 131 is an annular body, such as a C-ring, O-ring, or open ring, and has a first end and a second end disposed opposite to each other. The locking body 131 can be made of spring steel or tool steel, and has good elasticity and wear resistance. The first deformable portion 132 is disposed at the first end, and the second deformable portion 133 is disposed at the second end. The first deformable portion 132 and the second deformable portion 133 are lug structures or flange structures extending outward from both ends of the locking body 131, used to withstand the driving force applied by the operating part. The locking body 131 is movably disposed on the base plate 110, specifically by engaging with a groove in the base plate 110.

[0031] The operating part 200 includes a threaded rod 210, a pushing member 220, an elastic member 230, and a locking drive member 240. One end of the threaded rod 210 is connected to the first deformable part 132 (e.g., by welding, threaded connection, or hinge), and the other end of the threaded rod 210 passes through the second deformable part 133 and extends in a direction away from the second deformable part 133. The threaded rod 210 is provided with external threads.

[0032] Along the direction from the first deformed portion 132 to the second deformed portion 133, a pusher 220, an elastic member 230, and a locking drive member 240 are sequentially sleeved on the threaded rod 210, and all three are located on the side of the second deformed portion 133 away from the first deformed portion 132. The pusher 220 is an annular washer or push sleeve sleeved on the threaded rod 210, and abuts against the outer wall surface of the second deformed portion 133. The elastic member 230 can be a compression spring or a disc spring, sleeved on the threaded rod 210, with one end abutting against the pusher 220 and the other end abutting against the locking drive member 240. The locking drive member 240 is a nut or knob threaded into the threaded rod 210, and is located outside the stamping operation area.

[0033] When the locking drive 240 is tightened, it moves axially along the threaded rod 210 and applies a thrust to the second deformable part 133 through the elastic element 230 and the pushing element 220 in sequence. This converts the tightening motion into axial linear motion, generating a larger locking force. Simultaneously, the elastic element 230, sleeved on the threaded rod 210 and located between the pushing element 220 and the locking drive 240, can elastically deform to absorb excess displacement when the locking drive 240 is over-tightened. This prevents rigid compression from causing plastic deformation or damage to the locking body, providing overload protection and extending the service life of the locking element 130.

[0034] Furthermore, the locking drive 240 is located outside the stamping operation area, allowing operators to lock or unlock the device from a safe area simply by turning it, without the need for additional tools, making the operation quick and easy. Moreover, the threaded engagement between the locking drive 240 and the threaded rod 210 has a self-locking characteristic, meaning that the locking drive 240 will not loosen due to vibration when turned without external force. This feature ensures that the locking state remains stable during the stamping ejection process, preventing locking failure due to equipment vibration.

[0035] In some embodiments, the first deformable portion 132 and the second deformable portion 133 are used to move closer to each other when the locking drive member 240 is screwed on, so as to tighten the locking body 131; or to move further apart from each other when the locking drive member 240 is screwed on, so as to loosen the locking body 131. When the locking drive member 240 is screwed along the threaded rod 210 toward the direction of the second deformable portion, the locking drive member 240 pushes the second deformable portion toward the direction of the first deformable portion 132 through the elastic member 230 and the pushing member 220, the opening of the locking body decreases, the annular body tightens, thereby gripping the mold base 1000 and achieving locking limit. When the locking drive 240 is screwed along the threaded rod 210 in a direction away from the second deformable part 133, the compressive force of the locking drive 240 on the elastic member 230 decreases, the elastic member 230 recovers its deformation, the thrust of the push member 220 on the second deformable part decreases, the second deformable part 133 can move away from the first deformable part 132, the opening of the locking body 131 increases, the annular body loosens, and the locking limit is released.

[0036] The clamping locking structure of this embodiment makes the contact between the locking body 131 and the mold base 1000 a surface contact or arc surface contact. Compared with point contact or line contact locking methods, the contact area is significantly increased, thereby generating greater friction under the same driving force, making the locking more reliable. At the same time, the clamping locking force is evenly distributed along the circumference of the locking body, avoiding stress concentration and preventing indentations or deformation on the surface of the mold base 1000 due to excessive local stress, thus protecting the precision of the mold base 1000. Furthermore, during the stamping ejection process, the mold base 1000 will be subjected to impact and vibration. The clamping locking structure relies on friction to achieve locking, and the direction of the vibration force is perpendicular to the direction of the locking force. Vibration will not cause the locking body to automatically loosen, thus having self-locking and anti-loosening characteristics, ensuring the positioning stability of the substrate during continuous stamping ejection operations.

[0037] In some embodiments, a mounting groove (not shown in the figure) is formed on the inner wall of the locking body 131. The mounting groove is an annular groove extending circumferentially along the inner wall of the locking body, or a plurality of arc-shaped grooves spaced apart. An elastic washer is provided in the mounting groove. The elastic washer is made of an elastic material such as rubber, polyurethane or silicone, and the thickness of the elastic washer is greater than the depth of the mounting groove, so that the elastic washer protrudes from the inner wall surface of the locking body in its natural state.

[0038] The elastic washer, acting as an intermediate medium, first contacts the surface of the mold base. When subjected to locking force, the elastic washer undergoes elastic deformation, adaptively filling the microscopic gap between the inner wall of the locking body and the surface of the mold base, thus significantly increasing the actual contact area and improving locking stability. Furthermore, vibrations generated during the stamping and ejection process are absorbed and attenuated by the elastic deformation of the washer, acting as damping and vibration isolation, reducing the transmission of vibration through the locking element 130 to the base plate 110, thereby preventing the locking element from gradually loosening due to vibration and ensuring long-term reliability. In addition, the elastic washer buffers the hard contact with the surface of the mold base 1000, preventing wear or indentations caused by direct rigid contact between the inner wall of the locking body and the mold base surface, protecting the surface quality and operational accuracy of the mold base.

[0039] In some embodiments, the elastic washer protrudes from the inner wall surface of the locking body 131. This structure ensures that during the locking process, the elastic washer contacts the mold base and undergoes elastic compression prior to the inner wall of the locking body. Since the amount of compression of the elastic washer directly determines the contact pressure and friction between it and the mold base, the protruding structure ensures that the amount of compression of the elastic washer in the locked state is greater than zero, preventing the elastic washer from losing its function due to insufficient compression caused by installation or manufacturing errors.

[0040] In some embodiments, see continue to see Figure 2 The punch ejection device of the punching machine also includes a positioning member 300. The positioning member 300 is disposed on the second surface of the substrate 110, opposite to the first surface. The positioning member 300 is used to position and cooperate with the mold base 1000 to position the substrate 110 in a preset position on the mold base 1000. When the substrate 110 is positioned in the preset position, the ejector 120 corresponds to the position of the punch 2000. The positioning member 300 can be a positioning pin, a positioning block, or a positioning boss structure.

[0041] Based on the above structure, the substrate 110 can be quickly and accurately positioned on the mold base 1000 via the positioning member 300. Since the positioning member 300 has a defined size and positional relationship during the manufacturing of the substrate 110, the positioning fit between the positioning member and the mold base 1000 can reproduce the same position each time the substrate 110 is installed. Therefore, the substrate 110 does not need to be readjusted for each installation, greatly shortening the installation preparation time of the ejector device. Simultaneously, the positioning fit eliminates errors caused by manual visual alignment, ensuring that the ejector 120 accurately abuts against the end face of the punch 2000 during each ejection operation. The ejection force is transmitted along the axial direction of the punch, avoiding the problem of the punch bending or breaking due to eccentric load caused by alignment deviation, thus improving the success rate of punch ejection and the service life of the punch.

[0042] In some embodiments, see continue to see Figure 4 The mold base 1000 has multiple guide holes 1100. The guide holes 1100 are round or oblong. The substrate 110 has positioning grooves on one side where the positioning member 300 is located, corresponding to each guide hole 1100. Figure 2 (The bottom surface of 110). The positioning groove is a blind hole or a through hole.

[0043] The positioning element 300 includes multiple positioning rods. Each positioning rod is a cylindrical rod with a diameter smaller than that of the guide hole to achieve a clearance fit (avoiding damage to the mold). One end of each positioning rod is positioned in a corresponding positioning groove, and the other end is inserted into a corresponding guide hole 1100 to position the substrate 110 in a preset position. The number of positioning rods is at least two, preferably three or four, to achieve complete in-plane positioning.

[0044] This multi-rod positioning structure enables complete positioning of the substrate 110 on the mold base 1000. Specifically, when at least two positioning rods are used, the translational freedom of the substrate 110 in the horizontal plane is constrained; when three non-collinearly arranged positioning rods are used, the rotational freedom of the substrate in the horizontal plane is also fully constrained, thereby achieving precise positioning of the substrate 110 in the plane of the mold base 1000. The fitting accuracy between each positioning rod and its corresponding guide hole determines the positioning accuracy of the substrate. This pinhole fitting positioning method has high fitting accuracy and good reliability, and the positioning rods also serve to bear the lateral shear force. Even if subjected to lateral impact force during the ejection process, the positioning rods can withstand the shear load without bending or breaking, ensuring the positional stability of the substrate during the ejection process.

[0045] In some embodiments, an ejection groove is formed on the side of the substrate 110 where the ejector 120 is located. The ejection groove is a blind hole structure.

[0046] The ejector 120 includes multiple ejector rods. Each ejector rod is a cylindrical rod with one end positioned in a corresponding ejector slot and the other end used to abut against a punch. The position of each ejector rod corresponds one-to-one with the position of each punch, so as to achieve simultaneous ejection of multiple punches or selective ejection of specific punches.

[0047] This split ejector rod structure ensures that each punch has its own independent ejector rod, preventing interference between them. When a punch is difficult to eject due to excessive frictional resistance or jamming, the ejector rod corresponding to that punch bears the force alone and will not transmit the force to other ejector rods, thus not affecting the normal ejection of other punches.

[0048] In some embodiments, the ejector rod and the substrate 110 are detachably connected. Specifically, the ejector rod and the substrate can be detachably connected by a threaded connection, a snap-fit ​​connection, or a plug-in connection. When a threaded connection is used, one end of the ejector rod is provided with an external thread, and the inner wall of the ejector groove is provided with an internal thread. The ejector rod and the ejector groove are threadedly engaged (and can also be fastened with a nut).

[0049] This structure allows the ejector rod to be replaced according to different punch specifications and sizes, and the same base plate can be adapted to different models of punches, thereby improving the versatility and applicability of the ejection device. At the same time, the detachable connection also allows operators to select ejector rods of different lengths according to the ejection stroke requirements of different punches. The ejection stroke can be adjusted by replacing ejector rods of different lengths without replacing the entire base plate, making the adjustment of the ejection stroke more flexible and convenient.

[0050] The second aspect of this application provides a punch ejection method for a punching machine, applied to the punch ejection device for a punching machine provided in the first aspect. The punch ejection device further includes multiple pressure sensors and a controller. The controller is electrically connected to a driver of the mold base and the multiple pressure sensors. The driver 3000 is used to drive the mold base 1000 to move toward the punch 2000. The driver 3000 can be a hydraulic cylinder, a pneumatic cylinder, or a lead screw mechanism driven by a servo motor. Each pressure sensor is disposed on a corresponding ejection rod and is used to detect the pressure value on the corresponding ejection rod. The pressure sensor can be a strain gauge pressure sensor or a piezoelectric pressure sensor. The controller is a programmable logic controller or a microcontroller, which stores a preset pressure threshold. The preset pressure threshold is the minimum ejection force required for the punch to start moving. This threshold can be determined based on the interference fit between the punch 2000 and the punch support.

[0051] like Figure 6 As shown, the punch ejection method of a punching machine includes the following steps: Step S101: Obtain the position information of the punch to be ejected. The position information can be the punch number or the coordinate position of the punch in the mold. The position information can be obtained through operator input, barcode scanning, or instructions from the host computer.

[0052] Step S102: Based on the position information, determine the target pressure sensor corresponding to the punch to be ejected from among the pressure sensors. The controller pre-stores a correspondence table between punch positions and pressure sensor numbers, and the target pressure sensor can be determined according to this correspondence table. For example, when punch number 3 needs to be ejected, the controller determines the pressure sensor installed on the ejector rod corresponding to punch number 3 as the target pressure sensor according to the correspondence table.

[0053] Step S103: Acquire the pressure values ​​detected by each pressure sensor. The controller acquires the detection signals from each pressure sensor through the signal acquisition circuit and converts the detection signals into corresponding pressure values. Each pressure sensor detects the pressure on the corresponding ejector rod in real time and feeds back the detection results to the controller.

[0054] Step S104: Determine whether the following two conditions are met simultaneously: Condition 1: The pressure value fed back by the target pressure sensor is greater than the preset pressure threshold. If the pressure value fed back by the target pressure sensor is greater than the preset pressure threshold, it indicates that the ejector rod corresponding to the target pressure sensor has made effective contact with the punch to be ejected and has borne the ejection reaction force, that is, the ejector rod is accurately aligned with the punch to be ejected; if the pressure value fed back by the target pressure sensor is not greater than the preset pressure threshold, it indicates that the ejector rod has not made effective contact with the punch to be ejected, that is, there is a positional deviation between the ejector rod and the punch to be ejected, and they are not aligned.

[0055] Condition 2: The pressure values ​​reported by all pressure sensors other than the target pressure sensor are not greater than the preset pressure threshold. If the pressure values ​​reported by all other pressure sensors are not greater than the preset pressure threshold, it indicates that, except for the target ejector rod, the other ejector rods are not in contact with other punches, meaning there is no misalignment of other punches. If the pressure value reported by any pressure sensor other than the target pressure sensor is greater than the preset pressure threshold, it indicates that other ejector rods are also in contact with other punches and aligned with them, indicating misalignment.

[0056] Step S105 is executed only when both conditions one and two are met simultaneously, i.e., the pressure value fed back by the target pressure sensor is greater than the preset pressure threshold, and the pressure values ​​fed back by all other pressure sensors are not greater than the preset pressure threshold.

[0057] If condition one is not met (i.e., the pressure value fed back by the target pressure sensor is not greater than the preset pressure threshold), it indicates that the ejector rod corresponding to the punch to be ejected is not aligned with the punch. This may be due to a deviation in the substrate installation position, causing the ejector rod and the punch to be misaligned. In this case, the controller will not control the driver to operate and can issue a first alarm signal to prompt the operator to check the installation position of the substrate.

[0058] If condition one is met but condition two is not (i.e., the pressure value fed back by the target pressure sensor is greater than the preset pressure threshold, but the pressure values ​​fed back by one or more pressure sensors other than the target pressure sensor are also greater than the preset pressure threshold), it indicates that although the target punch has been aligned, other punches are also aligned by their corresponding ejector rods at the same time. In this case, the controller will not control the actuator to operate, and may issue a second alarm signal to prompt the operator that there is an abnormal situation where multiple punches are aligned at the same time, and the mounting position of the base plate needs to be readjusted.

[0059] Step S105: Control the drive to move the mold base towards the punch so that the punch is ejected from the mold by the ejector rod.

[0060] In this embodiment, the controller obtains the position information of the punch to be ejected and determines the target pressure sensor from each pressure sensor based on the position information. This step realizes the automatic identification and positioning of the specific punch to be ejected, eliminating the need for manual verification of the punch position one by one and avoiding the incorrect ejection of the punch due to human identification errors.

[0061] Subsequently, the controller comprehensively judges the pressure values ​​detected by each pressure sensor, and only allows the ejection operation to proceed if two conditions are met simultaneously. Condition one requires that the pressure value fed back by the target pressure sensor is greater than a preset pressure threshold. This judgment ensures that the target ejector rod has made effective contact with the end face of the punch to be ejected, i.e., the two are accurately aligned. Only when the ejector rod and the punch are aligned can the ejection force be uniformly transmitted along the punch's axial direction, avoiding bending or breakage of the punch due to eccentric loads caused by alignment deviations.

[0062] Condition two requires that the pressure values ​​fed back by all pressure sensors other than the target pressure sensor are not greater than a preset pressure threshold. This condition ensures that no other punches besides the target punch are simultaneously aligned with their corresponding ejector pins. During the ejection operation, if multiple punches are simultaneously aligned with their respective ejector pins and subjected to ejection forces, the mold base will apply ejection forces to multiple punches simultaneously when moving, potentially causing multiple punches to be ejected at the same time. This not only increases unnecessary workload by mistakenly ejecting punches that do not need to be replaced, but may also cause these mistakenly ejected punches to become misaligned or fail to return to their correct position during reset, affecting the accuracy and service life of the mold.

[0063] Therefore, this embodiment uses the aforementioned dual-condition judgment logic control to initiate the ejection operation only when the target punch is accurately aligned and all other punches are not aligned. This ensures that the punch to be ejected is correctly and safely ejected, while preventing other punches from being accidentally ejected. When either condition is not met, the controller does not operate and issues a corresponding alarm signal. It can proactively identify and prompt two different abnormal states (the ejector rod is not aligned with the target punch, or other punches are misaligned) before the ejection operation begins, helping operators quickly locate the root cause of the problem and take targeted measures. This significantly improves the reliability and safety of the ejection operation, while protecting the mold and punch from damage caused by misoperation.

[0064] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0065] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

[0066] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

[0067] Obviously, those skilled in the art can make various modifications and variations to this specification without departing from its spirit and scope. Therefore, if such modifications and variations fall within the scope of the claims and their equivalents, this specification is also intended to include such modifications and variations.

Claims

1. A punch ejection device for a punching machine, characterized in that, A stamping area is formed between the die base of the punching machine and the punch of the punching machine, and the ejection device includes: The main body, when the ejector device is installed on the punching machine, is located within the punching area; the main body includes a base plate, an ejector, and a locking member; the ejector is disposed on a first surface of the base plate, the ejector is used to abut against the punch, and after abutting, drives the punch to move to eject the punch from the punch support; the locking member is movably disposed on the base plate, the locking member has a locked state and an open state; when the locking member is in the locked state, the locking member locks and limits the base plate to the mold base; The operating part, when the ejector device is installed on the punching machine, has one end connected to the locking member and the other end extending to the outside of the punching area for external operation to drive the locking member to switch between the locked state and the open state.

2. The punch ejection device for a punching machine according to claim 1, characterized in that, The locking member includes a locking body, a first deformable portion, and a second deformable portion. The locking body is an annular body and has a first end and a second end disposed opposite to each other. The first deformable portion is disposed at the first end, and the second deformable portion is disposed at the second end. The locking body is movably disposed on the substrate. The operating part includes a threaded rod, a pushing member, an elastic member, and a locking drive member. One end of the threaded rod is connected to the first deformable part, and the other end of the threaded rod passes through the second deformable part and extends away from the second deformable part. Along the direction from the first deformed portion to the second deformed portion, the pushing member, the elastic member, and the locking drive member are sequentially sleeved on the threaded rod, and the pushing member, the elastic member, and the locking drive member are all disposed on the side of the second deformed portion away from the first deformed portion; The locking drive is located outside the stamping area.

3. The punch ejection device for a punching machine according to claim 2, characterized in that, The first deformable portion and the second deformable portion are used to move closer to each other when the locking drive is turned to tighten the locking body, or to move further apart when the locking drive is turned to loosen the locking body.

4. The punch ejection device for a punching machine according to claim 2, characterized in that, The inner wall of the locking body is provided with an installation groove, and an elastic washer is provided in the installation groove.

5. The punch ejection device for a punching machine according to claim 4, characterized in that, The elastic washer protrudes from the inner wall surface of the locking body.

6. The punch ejection device for a punching machine according to any one of claims 1 to 5, characterized in that, The punch ejection device of the punching machine further includes a positioning element, which is disposed on the second surface of the substrate, and the second surface is disposed opposite to the first surface. The positioning member is used to position and cooperate with the mold base to position the substrate at a preset position on the mold base; when the substrate is positioned at the preset position, the ejector member corresponds to the position of the punch.

7. The punch ejection device for a punching machine according to claim 6, characterized in that, The mold base is provided with a plurality of guide holes, and the side of the base plate on which the positioning element is disposed is provided with a positioning groove corresponding to each of the guide holes; The positioning element includes multiple positioning rods, one end of which is disposed in the corresponding positioning groove; the other end of which is used to insert into the guide hole at the corresponding position to position the substrate at the preset position.

8. The punch ejection device for a punching machine according to claim 7, characterized in that, The substrate has an ejector groove on the side where the ejector is disposed; The ejector includes a plurality of ejector rods, one end of which is disposed in the corresponding ejector groove, and the other end of which is used to abut against the punch.

9. The punch ejection device for a punching machine according to claim 8, characterized in that, The ejector rod is detachably connected to the substrate.

10. A method for ejecting a punch from a punching machine, characterized in that, The punch ejection device for a punching machine as described in claim 8 or 9 further includes a plurality of pressure sensors and a controller, wherein the controller is electrically connected to the driver of the mold base and the plurality of pressure sensors respectively. The driver is used to drive the mold base to move toward the punch; each of the pressure sensors is disposed on the corresponding ejector rod and is used to detect the pressure value on the corresponding ejector rod; The punch ejection method of the punching machine includes: Obtain the current position information of the punch to be ejected; Based on the location information, determine the target pressure sensor corresponding to the current ejector punch from among the pressure sensors; Obtain the pressure values ​​detected by each of the pressure sensors; If the pressure value fed back by the target pressure sensor is greater than the preset pressure threshold, and the pressure values ​​fed back by the other pressure sensors are not greater than the preset pressure threshold, the actuator is controlled to operate.

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