Stamping equipment

Abstract

The invention discloses stamping equipment. The stamping equipment comprises a stamping mechanism for driving a punch to lift up and down in a reciprocating manner; the stamping mechanism comprises a driving shaft, an adjusting assembly and a connecting rod. The driving shaft is rotationally installed on the rack, the adjusting assembly is installed on the crankshaft section of the driving shaft through the first end, the second end of the adjusting assembly is hinged to the first end of the connecting rod, and the second end of the connecting rod is hinged to the punch. The adjusting assembly is suitable for rotating around the crankshaft section by a set angle according to the range extending requirement, so that the hinged position of the adjusting assembly and the connecting rod is equivalent to the eccentric position of the driving shaft. The adjusting assembly and the crankshaft section are subjected to friction locking meeting the set punching force after rotation is completed. The range extender has the beneficial effects that the adjusting assembly and the crankshaft section can be locked according to the actual production requirement so as to meet the range extending requirement; and meanwhile, friction locking of the adjusting assembly and the crankshaft section can ensure that connection can be disconnected during overload so as to protect the safety of the punch.

Description

Technical Field

[0001] This application relates to the field of stamping technology, and in particular to a stamping device. Background Technology

[0002] Stamping equipment is an industrial device that applies pressure to materials using a mold to achieve plastic shaping. Its functions include bending, stretching, embossing, punching, blanking, and cutting. Depending on the requirements of the processing technology, different processing techniques require different processing strokes; generally, bending and stretching require longer strokes, while punching and blanking require shorter strokes. However, existing stamping equipment is often only suitable for processing products within a certain stroke range. That is, the processing stroke of the stamping equipment depends on the crankshaft's eccentricity. Since the crankshaft is based on a one-piece molding process, the eccentricity is relatively short, limiting the processing to products whose stroke requirements are within the crankshaft's eccentricity. This results in a limited versatility for existing stamping equipment. Furthermore, during the stamping process, abnormal situations may occur, preventing the punch from advancing and ultimately causing the drive motor to overload and burn out. Summary of the Invention

[0003] One of the objectives of this application is to provide a stamping device that can solve at least one of the defects in the aforementioned background art.

[0004] To achieve at least one of the above objectives, the technical solution adopted in this application is as follows: a stamping device, comprising a frame and a stamping mechanism mounted on the frame, the stamping mechanism being adapted to drive a punch to perform reciprocating stamping motion; the stamping mechanism comprising a drive shaft, an adjusting component, and a connecting rod; the drive shaft being rotatably mounted on the frame, the adjusting component being mounted on the crankshaft section of the drive shaft via a first end, the second end of the adjusting component being hinged to the first end of the connecting rod, and the second end of the connecting rod being hinged to the punch; the adjusting component being adapted to rotate around the crankshaft section at a set angle according to the range extension requirement, such that the hinge position of the adjusting component and the connecting rod is equivalent to the eccentric position of the drive shaft; after the adjusting component completes rotation, it is frictionally locked with the crankshaft section to meet the set stamping force, so that when the resistance of the punch exceeds the set stamping force, the adjusting component and the crankshaft section perform overload protection against relative rotation.

[0005] Preferably, a first friction disc is provided on the side of the crankshaft section; the adjustment assembly includes a mounting base, a drive assembly, and an elastic friction assembly; the mounting base is sleeved onto the crankshaft section at its first end, the first end of the mounting base has a mounting cavity inside, and the second end of the mounting base is used to hinge with the first end of the connecting rod; the elastic friction assembly is located in the mounting cavity and rotatably mounted on the crankshaft section, and the elastic friction assembly is adapted to perform a circumferential limiting engagement with the mounting base; the drive assembly is mounted on the mounting base and performs a driving engagement with the elastic friction assembly; the drive assembly is adapted to drive the elastic friction assembly to move axially along the crankshaft section until the elastic friction assembly and the first friction disc are elastically compressed and frictionally locked.

[0006] Preferably, the first friction discs are provided on both sides of the crankshaft section; a pair of elastic friction components are provided, and the two elastic friction components are symmetrically installed on both sides of the crankshaft section. The two elastic friction components cooperate with the drive component at the same time, so that the two elastic friction components move axially toward the first friction discs on the corresponding sides under the drive component.

[0007] Preferably, the elastic friction assembly includes a push sleeve, a disc spring assembly, and a second friction disc; the push sleeve is rotatably mounted on the crankshaft section and engages in transmission with the drive assembly; the second friction disc is rotatably mounted on the crankshaft section and engages in axial sliding cooperation with the push sleeve for circumferential limiting; the disc spring assembly is sleeved on the crankshaft section and located between the second friction disc and the push sleeve; the push sleeve moves axially under the drive assembly, thereby pushing the second friction disc to engage in frictional locking with the first friction disc through the disc spring assembly; the impact force corresponding to the frictional locking between the second friction disc and the first friction disc is set by the deformation of the disc spring assembly.

[0008] Preferably, the first friction disc includes a first annular disc and a first friction block. The first annular disc is sleeved on the crankshaft segment and fixedly installed on the side of the crankshaft segment, and the first friction block is disposed on the first annular disc. The second friction disc includes a second annular disc and a second friction block. The second annular disc is rotatably installed on the crankshaft segment and has a circumferentially limited sliding engagement with the push sleeve. The second friction block is disposed on the second annular disc and is used to perform frictional engagement with the first friction block. The first friction block is made of resin-based friction material, and the second friction block is made of cast iron material; or, the first friction block is made of cast iron material, and the second friction block is made of resin-based friction material.

[0009] Preferably, the driving assembly includes a driving device and a transmission sleeve; the transmission sleeve is rotatably mounted in the mounting cavity and has axial movement limitation; the driving device is fixedly mounted in the mounting base and has a transmission engagement with the transmission sleeve; the transmission sleeve is adapted to rotate circumferentially around the mounting cavity under the drive of the driving device; the transmission sleeve and the elastic friction assembly are threaded together so that the elastic friction assembly moves axially under the rotation drive of the transmission sleeve.

[0010] Preferably, the mounting base is provided with a window communicating with the mounting cavity, the driving device is a rotating device and is fixedly installed on the outside of the mounting base, and the output end of the driving device is provided with a worm shaft extending to the window; the outer side of the transmission sleeve is provided with a gear tooth section that engages with the worm shaft for transmission.

[0011] Preferably, the drive shaft adopts a segmented structure that is divided into two sections along the middle of the crankshaft segment, and the two sections are connected by a spline structure.

[0012] Preferably, the stamping mechanism further includes a locking component mounted on the punch; when the adjusting component adjusts the angle relative to the crankshaft section according to different stroke requirements, the locking component is adapted to lock the punch and the connecting rod when the stamping mechanism is at its maximum stroke, so that when the drive shaft rotates around the mounting position until the distance between the axis of the drive shaft and the first end of the connecting rod meets the stroke requirements, the locking component is controlled to release the lock on the connecting rod after the adjusting component completes friction locking.

[0013] Preferably, the second end of the connecting rod is provided with a locking hole; the locking assembly includes a telescopic device, a guide seat, a locking rod, and a spring; the guide seat is fixedly installed on the punch, the locking rod is vertically slidably installed on the guide seat, and the locking rod and the guide seat are axially elastically connected by the spring; the telescopic device is fixedly installed on the punch and drives the locking rod through its output end; the locking rod is adapted to engage with the locking hole when the output end of the telescopic device extends, and the locking rod is adapted to disengage from the locking hole by the restoring force of the spring when the output end of the telescopic device retracts to release the lock.

[0014] Compared with the prior art, the beneficial effects of this application are as follows: The technical solution of this application adds an adjustment component to the traditional solution. The adjustment component can be locked with the crankshaft section according to actual production needs, thereby increasing the eccentric distance of the drive shaft to adjust the stamping stroke and effectively improving the applicability of the stamping equipment. At the same time, through the friction locking between the adjustment component and the crankshaft section, the lock can be released when the punch is overloaded to protect the motor safety of the stamping mechanism. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this application.

[0016] Figure 2 This is a simplified working diagram of a traditional stamping mechanism.

[0017] Figure 3 This is a schematic diagram of the stamping mechanism in this application.

[0018] Figure 4 This is a simplified motion diagram of the stamping mechanism in this application during operation.

[0019] Figure 5 This is a schematic diagram of the drive shaft in this application.

[0020] Figure 6 This is a schematic diagram of the decomposed state structure of the adjustment component in this application.

[0021] Figure 7 This is a schematic diagram of the mounting base in this application.

[0022] Figure 8 This is a schematic diagram of the transmission sleeve in this application.

[0023] Figure 9 This is a partial cross-sectional view of the push sleeve in this application.

[0024] Figure 10 This is a schematic diagram of the structure of the second ring disk in this application.

[0025] Figure 11 This is a cross-sectional view of the adjustment component in this application along the direction perpendicular to the axial direction.

[0026] Figure 12 This is a partial cross-sectional view of the adjustment component along the axial direction in this application.

[0027] Figure 13 This is a schematic diagram of the connecting rod in this application.

[0028] Figure 14 This is a schematic diagram showing the disassembled state of the locking component in this application.

[0029] In the diagram: Frame 1, stamping mechanism 2, drive shaft 21, crankshaft section 211, first spline groove 2110, spline shaft 2111, first friction disc 212, first ring disc 2121, first friction block 2122, adjusting assembly 22, mounting base 221, mounting cavity 220, window 2210, second spline groove 2211, fixed base 2212, hinge 2213, rotating device 222, worm shaft 2221, transmission sleeve 223, gear tooth section 2231 2232, first threaded section, bearing, push sleeve, positioning cavity, first splined section, second threaded section, second splined section, second splined section, disc spring, second friction disc, third splined groove, second ring disc, second friction block, connecting rod, locking hole, locking assembly, telescopic device, guide seat, locking rod, spring, punch 3. Detailed Implementation

[0030] The present application will now be further described in conjunction with specific embodiments. It should be noted that, in the description of this specification, the use of terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicates that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms should not be construed as necessarily referring to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0031] In the description of this application, it should be noted that the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., which indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application 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 should not be construed as limiting the specific protection scope of this application.

[0032] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0033] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0035] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this application are intended to cover non-exclusive inclusion, for example, a process, method, system, product, or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0036] One preferred embodiment of this application, such as Figure 1 and Figure 3 As shown, a stamping device includes a frame 1 and a stamping mechanism 2 mounted on the frame 1. The stamping mechanism 2 can drive a punch 3 to perform reciprocating stamping motion. Specifically, if the stamping device adopts a vertical structure, the stamping mechanism 2 can drive the punch 3 to perform reciprocating motion in the vertical direction; if the stamping device adopts a horizontal structure, the stamping mechanism 2 can drive the punch 3 to perform reciprocating motion in the horizontal direction. The specific structure of the punch 3 is well known to those skilled in the art, and therefore will not be described in detail here. The stamping mechanism 2 includes a drive shaft 21, an adjusting component 22, and a connecting rod 23. The drive shaft 21 is rotatably mounted on the frame 1 and can rotate under the transmission drive of a motor (not shown). The adjusting component 22 is mounted at its first end on a crankshaft section 211 of the drive shaft 21, and its second end is hinged to the first end of the connecting rod 23. The second end of the connecting rod 23 is hinged to the punch 3.

[0037] When it is necessary to extend the stamping stroke of the stamping mechanism 2, the adjusting component 22 can rotate around the crankshaft section 211 at a set angle according to the stroke extension requirement, so that the hinge position of the adjusting component 22 and the connecting rod 23 can be equivalent to the eccentric position of the drive shaft 21; that is, at this time, the stamping stroke of the stamping mechanism 2 is transformed from the axial distance from the crankshaft section 211 to the axial distance from the hinge position of the adjusting component 22 and the connecting rod 23 to the drive shaft 21; thus, the long stroke requirement of the stamping mechanism 2 can be met. Furthermore, after the adjusting component 22 completes the rotation, it can perform friction locking with the crankshaft section 211 to meet the set stamping force; thus, when the resistance of the punch 3 exceeds the set stamping force due to overload, the adjusting component 22 can release the friction lock with the crankshaft section 211 and perform overload protection for relative rotation.

[0038] For ease of understanding, the working process of traditional stamping equipment and the working process of the stamping equipment of this application will be described in detail below.

[0039] Specifically, such as Figure 2 As shown, in the traditional method, the axis position of the drive shaft 21 can be set as A; when the punch 3 is at the maximum punching stroke position, as... Figure 2 As shown in (1), the extension directions of crankshaft section 211 and connecting rod 23 are located in the same plane in the vertical direction. The connection position between connecting rod 23 and punch 3 can be set as C. With the rotation of drive shaft 21, as... Figure 2 As shown in (2), at this time, the crankshaft section 211 can drive the connecting rod 23 to pull the punch 3 in the direction of minimum punching stroke. As the drive shaft 21 continues to rotate, until the minimum stroke position of the punch 3 is reached, as shown in (2), Figure 2 As shown in (3), at this time, the extension directions of crankshaft segment 211 and connecting rod 23 are again in the same plane, and connecting rod 23 and crankshaft segment 211 are in an overlapping state. At this time, the connection position between connecting rod 23 and punch 3 can be set as B. Based on the above process, it can be seen that the stroke of punch 3 in the traditional way is the distance L1 between position B and position C, and the specific value of distance L1 is twice the eccentric distance X of crankshaft segment 211, that is, L1=2X.

[0040] In the technical solution of this application, such as Figure 4 As shown, the adjusting component 22 and the crankshaft section 211 are relatively locked together, and the adjusting component 22 and the crankshaft section 211 can be tilted at a corresponding angle according to the stroke extension requirements; at this time, the vertical position of the axis of the drive shaft 21 can be set as A. When the punch 3 is at the maximum stroke position, as shown... Figure 4As shown in (1), at this time, the axis of the drive shaft 21, the hinge position of the connecting rod 23 and the adjusting assembly 22, and the hinge position of the connecting rod 23 and the punch 3 are all in the same plane. Therefore, the connection position of the connecting rod 23 and the punch 3 can be set to position D in the vertical direction. As the drive shaft 21 rotates, as... Figure 4 As shown in (2), the integrated structure formed by the crankshaft section 211 and the adjusting assembly 22 can drive the connecting rod 23 to swing, thereby driving the punch 3 to move in the direction of minimum stroke. As the drive shaft 21 continues to rotate, until the punch 3 reaches the minimum stroke position, as shown in (2), the connecting rod 23 swings, thereby driving the punch 3 to move in the direction of minimum stroke. Figure 4 As shown in (3), at this time, the axis of the drive shaft 21, the hinge position of the connecting rod 23 and the adjusting component 22, and the hinge position of the connecting rod 23 and the punch 3 are again located in the same plane. However, the overall structure formed by the connecting rod 23, the adjusting component 22, and the crankshaft section 211 is in an overlapping state. At this time, it can be assumed that the connection position of the connecting rod 23 and the punch 3 is located at position E in the vertical direction. Based on the above process, it can be known that the stroke of the punch 3 is the distance L2 between position D and position E, and the specific value of the distance L2 is twice the distance Z from the axis of the drive shaft 21 to the hinge position of the connecting rod 23 and the adjusting component 22, that is, L2=2Z.

[0041] Understandably, the value of Z depends on the eccentric distance X between the crankshaft section 211 and the drive shaft 21 axis, the extension length Y of the first and second ends of the adjusting component 22, and the angle between the crankshaft section 211 and the adjusting component 22. It should be noted that the maximum value of Z is X+Y, therefore the maximum value of L2 is 2(X+Y). Based on the length Y of the adjusting component 22, the stamping stroke of the stamping mechanism 2 in this application is significantly greater than that of conventional stamping methods. Meanwhile, since the adjusting component 22 is frictionally locked to the side of the crankshaft section 211, the frictional force of this frictional lock can be adjusted according to the stamping scenario to ensure that the frictional force between the adjusting component 22 and the crankshaft section 211 can meet the stamping pressure requirements of the current scenario. In order to ensure work safety, the frictional force between the adjusting component 22 and the crankshaft section 211 needs to be designed according to a safety margin; for example, if the stamping pressure in the current stamping scenario is P, the corresponding frictional force is F; then when the adjusting component 22 and the crankshaft section 211 are frictionally locked, 1.2F can be applied, that is, a 20% safety margin needs to be increased. When the punch 3 is overloaded during operation, that is, when the resistance of the punch 3 is greater than 1.2P, causing the driving force of the punch 3 to act on the adjusting component 22 to be greater than the frictional force between the adjusting component 22 and the crankshaft section 211, the adjusting component 22 will rotate relative to the crankshaft section 211, thereby realizing the overload protection of the motor of the stamping mechanism 2.

[0042] In this embodiment, since the adjustment component 22 needs to be installed on the crankshaft section 211, and the traditional drive shaft 21 is a one-piece structure, the installation of the adjustment component 22 may be difficult. Therefore, in the technical solution of this application, in order to facilitate the installation of the adjustment component 22, such as... Figure 5 As shown, the drive shaft 21 is designed as a split unit, meaning it can be divided into two parts along the crankshaft segment 211. To facilitate subsequent force stability, the drive shaft 21 is split in half along the middle of the crankshaft segment 211. One half of the crankshaft segment 211 has a splined shaft 2111 on its end face, while the other half has a first spline groove 2110 on its end face. Thus, the two half of the crankshaft segment 211 can be splined together via the splined shaft 2111 and the first spline groove 2110, ensuring accurate positioning of the overall structure of the drive shaft 21. Furthermore, the split design of the drive shaft 21 facilitates the installation of the adjustment assembly 22.

[0043] In this embodiment, the adjustment component 22 capable of achieving the above-mentioned functions has multiple specific structures. For ease of understanding, one of these structures will be described in detail below. For example... Figures 5 to 7 As shown, a first friction disc 212 is provided on the side of the crankshaft section 211; the adjusting assembly 22 includes a mounting base 221, a driving assembly, and an elastic friction assembly. The mounting base 221 is sleeved onto the crankshaft section 211 at its first end, and a mounting cavity 220 is provided inside the first end of the mounting base 221. A hinge portion 2213 is provided at the second end of the mounting base 221 for hinged engagement with the first end of the connecting rod 23. The elastic friction assembly is located in the mounting cavity 220 and rotatably mounted on the crankshaft section 211. The elastic friction assembly can perform a circumferential limiting engagement with the mounting base 221; the driving assembly is mounted on the mounting base 221 and performs a driving engagement with the elastic friction assembly. The driving assembly can drive the elastic friction assembly to move axially until the elastic friction assembly and the first friction disc 212 achieve frictional locking through elastic compression. At this point, the elastic friction assembly and the crankshaft section 211 can form an integral structure in the circumferential direction. Due to the circumferential limiting fit between the elastic friction assembly and the mounting base 221, the elastic friction assembly, the mounting base 221, and the crankshaft section 211 can form an integral structure in the circumferential direction.

[0044] It is understandable that the elastic friction assembly can only perform elastic friction locking with the first friction disk 212 set on one side of the crankshaft section 211; therefore, when setting the elastic friction assembly, only one elastic friction assembly can be set; however, in order to ensure the stability of the force on the adjusting assembly 22, in this embodiment, it is preferable to set the first friction disk 212 on both sides of the crankshaft section 211, and set the number of elastic friction assemblies to a pair, with the two elastic friction assemblies symmetrically installed on both sides of the crankshaft section 211. The two elastic friction assemblies cooperate with the driving assembly at the same time, so that the two elastic friction assemblies move axially towards the first friction disk 212 on the corresponding side under the drive of the driving assembly, until the two elastic friction assemblies simultaneously perform elastic friction locking with the first friction disk 212 on the corresponding side.

[0045] In this embodiment, there are multiple ways to achieve circumferential limiting engagement between the elastic friction component and the mounting base 221. For ease of understanding, one structure will be described in detail below. For example... Figure 6 , Figure 7 and Figure 9 As shown; the side of the mounting cavity 220 is provided with an opening, and the side wall of the opening is provided with a second spline groove 2211; the elastic friction assembly cooperates with the second spline groove 2211 through the first spline segment 2251 provided on the outside, so that the elastic friction assembly can move axially relative to the mounting base 221, but the circumferential rotation is restricted.

[0046] In this embodiment, there are various specific structures for the elastic friction assembly capable of achieving elastic friction locking. For ease of understanding, one structure will be described in detail below. For example... Figure 5 , Figures 9 to 12 As shown, the elastic friction assembly includes a push sleeve 225, a disc spring assembly, and a second friction disc 227. The push sleeve 225 is rotatably mounted on the crankshaft section 211 and engages with the drive assembly for transmission; the second friction disc 227 is rotatably mounted on the crankshaft section 211 and engages with the push sleeve 225 for circumferential limiting axial sliding; the disc spring assembly is composed of multiple stacked disc springs 226, which are sleeved on the crankshaft section 211 and located between the second friction disc 227 and the push sleeve 225.

[0047] As the push sleeve 225 moves towards the first friction disk 212 on the corresponding side under the drive of the drive assembly, the push sleeve 225 can push the disc spring assembly and the second friction disk 227 to move synchronously until the second friction disk 227 contacts the first friction disk 212. Subsequently, the push sleeve 225 continues to drive the disc spring assembly to compress and deform towards the first friction disk 212 on the corresponding side, so that the second friction disk 227 and the first friction disk 212 are frictionally locked based on the elastic deformation of the disc spring assembly; wherein, the elastic deformation of the disc spring assembly can be calculated based on the elastic coefficient of the disc spring 226 and the required impact force.

[0048] It is understandable that the stamping force P of the stamping mechanism 2 is provided by the frictional force F between the first friction disk 212 and the second friction disk 227; since both sides of the crankshaft section 211 are provided with first friction disks 212 and are frictionally locked with the corresponding second friction disks 227. For ease of understanding, it can be assumed that P=2F, that is, F=P / 2=ηF N Where η represents the coefficient of friction between the first friction disk 212 and the second friction disk 227, and F N This represents the normal force provided by the disc spring assembly, that is, the elastic force generated by the elastic deformation of the disc spring assembly. Therefore, the formula for calculating the elastic deformation d of the disc spring assembly is: d = F N / k=P / (2ηk); where k represents the spring constant of disc spring 226. The number n of disc springs 226 included in the disc spring assembly can be selected according to their spring constant k and the impact force P; the maximum allowable deformation of a single disc spring 226 can be set as d. max Then we have n×d max ×k=F N .

[0049] In this embodiment, there are multiple ways to achieve circumferential limiting engagement between the second friction disc 227 and the push sleeve 225. For ease of understanding, one structure will be described in detail below. For example... Figure 9 and Figure 10 As shown, a third spline groove 2270 is provided on the outer side of the second friction disk 227, and a positioning cavity 2250 is provided on the side of the push sleeve 225 near the second friction disk 227. A second spline segment 2253 is provided on the side of the positioning cavity 2250. The second friction disk 227 is slidably mounted in the positioning cavity 2250 and splines with the second spline segment 2253 on the side of the positioning cavity 2250 through the third spline groove 2270 on its outer side. Thus, when the second friction disk 227 is frictionally locked with the first friction disk 212, the driving force of the drive shaft 21 can be transmitted from the first friction disk 212 to the second friction disk 227 and then transmitted to the entire mounting base 221 through the push sleeve 225.

[0050] In this embodiment, as Figure 5, Figure 10 and Figure 12 As shown, the first friction disc 212 includes a first ring disc 2121 and a first friction block 2122. The first ring disc 2121 is sleeved on the crankshaft section 211 and fixedly installed on the side of the crankshaft section 211 by fasteners. The first friction block 2122 is disposed on the first ring disc 2121. The second friction disc 227 includes a second ring disc 2271 and a second friction block 2272. The second ring disc 2271 is rotatably mounted on the crankshaft section 211 and slides in a circumferentially limited manner with the push sleeve 225 through a third spline groove 2270 provided on its outer side. The second friction block 2272 is disposed on the second ring disc 2271 and is used to perform frictional engagement with the first friction block 2122. The first friction block 2122 is made of resin-based friction material, and the second friction block 2272 is made of cast iron material; or, the first friction block 2122 is made of cast iron material, and the second friction block 2272 is made of resin-based friction material.

[0051] It is understood that the specific composition of resin-based friction materials is well-known to those skilled in the art, and therefore will not be described in detail here; for details, please refer to Chinese invention patent with publication number CN103788924A entitled "A Friction Material".

[0052] In this embodiment, the drive assembly for axially driving the push sleeve 225 has multiple structures. For ease of understanding, one of these structures will be described in detail below. Figure 6 , Figure 8 , Figure 9 and Figure 12 As shown, the drive assembly includes a drive device and a transmission sleeve 223; the transmission sleeve 223 is rotatably mounted in the mounting cavity 220 and has axial movement limit; the drive device is fixedly mounted in the mounting base 221 and has a transmission engagement with the transmission sleeve 223; the transmission sleeve 223 can rotate circumferentially around the mounting cavity 220 under the drive of the drive device; the transmission sleeve 223 is threadedly engaged with the outer side of the push sleeve 225 of the elastic friction assembly, so that the push sleeve 225 of the elastic friction assembly moves axially under the rotation drive of the transmission sleeve 223.

[0053] Specifically, such as Figure 8 , Figure 9 and Figure 12 As shown, the outer side of the push sleeve 225 is divided into two sections. One section has a first spline section 2251, and the other section has a second threaded section 2252. The transmission sleeve 223 is fitted onto the push sleeve 225 and engages with the second threaded section 2252 through the first threaded section 2232 on its inner side. Thus, when the transmission sleeve 223 rotates, its axial movement is restricted, and the circumferential rotation of the push sleeve 225 is restricted by the mounting base 221, allowing the push sleeve 225 to move axially under the threaded engagement of the transmission sleeve 223.

[0054] It is understandable that, since there are two symmetrical elastic friction components, the inner side of the transmission sleeve 223 is symmetrically provided with a first threaded section 2232, and the two first threaded sections 2232 have opposite rotation directions; correspondingly, the second threaded sections 2252 provided on the outer side of the corresponding push sleeves 225 of the two elastic friction components also have opposite rotation directions. This ensures that the transmission sleeve 223 drives the two elastic friction components to move towards or away from each other in a single rotation direction. Meanwhile, for the axial limiting of the transmission sleeve 223, a positioning groove of the same width as the transmission sleeve 223 can be provided inside the mounting cavity 220. However, considering that when the transmission sleeve 223 drives the push sleeve 225 to move, the transmission sleeve 223 will have frictional contact with the side wall of the positioning groove, affecting the smooth rotation of the transmission sleeve 223, therefore, in this embodiment, if... Figure 6 and Figure 12 As shown, axial bearings 224 can be installed on both sides of the positioning groove, and the two ends of the transmission sleeve 223 are in contact with the bearings 224.

[0055] In this embodiment, there are multiple ways to drive the rotation of the transmission sleeve 223. For ease of understanding, a specific example will be used to illustrate this in detail below. Figure 7 , Figure 8 , Figure 11 and Figure 12 As shown, the mounting base 221 has a window 2210 communicating with the mounting cavity 220. The drive device is a rotating device 222, which is fixedly mounted on a fixed base 2212 on the outside of the mounting base 221. The output end of the drive device is equipped with a worm shaft 2221 extending to the window 2210; the outer side of the transmission sleeve 223 is provided with a gear tooth section 2231 that engages with the worm shaft 2221. That is, the outer side of the transmission sleeve 223 and the worm shaft 2221 are engaged by a worm gear, so that when the rotating device 222 stops, the internal structure of the adjusting component 22 can be kept stable by the self-locking of the worm gear structure. The specific structure and working principle of the rotating device 222 are well known to those skilled in the art, and therefore will not be described in detail here; common rotating devices 222 include motors, rotary cylinders, and rotary hydraulic cylinders, etc., and a motor is preferred in this embodiment.

[0056] In this embodiment, depending on the range extension requirements, the relative deflection angle between the adjustment component 22 and the crankshaft section 211 needs to be adjusted. There are multiple ways to adjust the angle of the adjustment component 22 relative to the crankshaft section 211. For ease of understanding, a specific example will be used to explain this in detail below. Figure 3 and Figure 4As shown, the stamping mechanism 2 also includes a locking component 25 installed on the punch 3; when the adjusting component 22 adjusts the angle relative to the crankshaft section 211 according to different stroke requirements, the locking component 25 can lock the punch 3 and the connecting rod 23 when the stamping mechanism 2 is at its maximum stroke, so that when the drive shaft 21 rotates around the installation position until the distance between the axis of the drive shaft 21 and the first end of the connecting rod 23 meets the stroke requirements, the locking component 25 is controlled to release the lock on the connecting rod 23 after the adjusting component 22 completes the friction lock.

[0057] Understandably, the range extension required for different travel scenarios is achieved by adjusting the deflection angle when the adjustment component 22 and crankshaft section 211 are in frictional locking; that is, different range extension distances correspond to different deflection angles. However, the deflection angle between the adjustment component 22 and crankshaft section 211 is not easy to measure directly. Therefore, when switching between different range extension requirements, in order to ensure the accuracy of the deflection angle between the adjustment component 22 and crankshaft section 211, it is necessary to select an initial position reference and then convert the deflection angle when the adjustment component 22 and crankshaft section 211 are relatively fixed into the angular relationship between crankshaft section 211 and position reference to simplify the measurement process.

[0058] Specifically, the initial position reference can be selected as the position of the stamping mechanism 2 when it is at its maximum stroke, such as... Figure 4 As shown in (1), at this time, the axis of the drive shaft 21, the connection position between the crankshaft section 211 and the adjusting component 22, the connection position between the adjusting component 22 and the connecting rod 23, and the connection position between the connecting rod 23 and the punch 3 are all in the same plane, so the plane can be set as the reference plane. If the connecting rod 23 is locked by the locking component 25 at this time, then during the rotation of the drive shaft 21, the connecting rod 23 can only translate to keep the extension line parallel to the movement direction of the punch 3. That is, at this time, only the angle between the adjusting component 22 and the crankshaft section 211 changes, so the position of the adjusting component 22 only needs to be adjusted according to the angle corresponding to the current required stroke.

[0059] It is important to understand that the distance between the first end of connecting rod 23 and the axis of drive shaft 21 is related not only to the angle between adjusting assembly 22 and crankshaft section 211, but also to the angle between crankshaft section 211 and reference plane. Since the distance between the first end of connecting rod 23 and the axis of drive shaft 21 is related to the stroke requirement, the control of the stroke requirement in this application can be transformed into angle control between crankshaft section 211 and reference plane, i.e., the angle α required for drive shaft 21 to rotate according to the range extension requirement. For ease of understanding, the specific derivation process of the conversion formula based on angle α will be described below.

[0060] Specifically, the extension length of the adjusting component 22 is Y, which is the distance between the two ends of the adjusting component 22 used to connect the crankshaft section 211 and the connecting rod 23. From the aforementioned analysis, it can be seen that the range extension requirement in the range-extending drive mode is the stroke L2 = 2Z; therefore, using trigonometric relationships, we can obtain: cosα=(X 2 +Z 2 -Y 2 ) / (2XZ).

[0061] α=arccos(X 2 +Z 2 -Y 2 ) / (2XZ).

[0062] As can be seen from the above expression, when the eccentric distance X of crankshaft section 211 and the extension length Y of adjustment component 22 are known, the distance Z of the first end of connecting rod 23 from drive shaft 21 can be obtained according to the given range extension requirement. Then, the specific value of the angle α required for drive shaft 21 to rotate according to the range extension requirement can be calculated by the above expression.

[0063] It should be noted that, in order to ensure the accuracy of the rotation angle of the drive shaft 21, an angle detection device can be installed on the machine body 1 to monitor the rotation angle of the drive shaft 21. The specific structure and working principle of the angle detection device are well known to those skilled in the art, and therefore will not be described in detail here.

[0064] In this embodiment, there are various specific implementations for locking the connecting rod 23 with the locking component 25. For ease of understanding, a specific example will be described in detail below. Figure 13 and Figure 14 As shown, the second end of the connecting rod 23 is provided with a locking hole 230; the locking assembly 25 includes a telescopic device 251, a guide seat 252, a locking rod 253, and a spring 254. The guide seat 252 is fixedly installed on the punch 3, and the locking rod 253 is vertically slidably installed on the guide seat 252; the spring 254 is sleeved on the locking rod 253, and one end of the spring 254 is connected to the locking rod 253, and the other end of the spring 254 is connected to the guide seat 252, which makes the locking rod 253 and the guide seat 252 axially elastically connected through the spring 254; the telescopic device 251 is fixedly installed on the punch 3 and is used to cooperate with the locking rod 253.

[0065] When the stamping mechanism 2 switches strokes, the output end of the telescopic device 251 extends and pushes the locking rod 253 toward the connecting rod 23 until the locking rod 253 is engaged and locked with the locking hole 230, thus fixing the second end of the connecting rod 23 relative to the punch 3. During this process, the spring 254 is in an elastic deformation state. When the stamping mechanism 2 completes the stroke switching and performs the stamping operation, the output end of the telescopic device 251 is in a retracted state. At this time, the locking rod 253 moves away from the locking hole 230 under the elastic force of the spring 254 to release the lock on the connecting rod 23, so that the second end of the connecting rod 23 is restored to the hinged connection with the punch 3.

[0066] It is understood that the function of the guide seat 252 is to provide guide support for the locking rod 253 and ensure the stability of the axial movement of the locking rod 253; the specific structure and working principle of the telescopic device 251 are well known to those skilled in the art. Common telescopic devices 251 include cylinders, hydraulic cylinders and linear motors, etc. In this embodiment, a hydraulic cylinder is preferred.

[0067] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A stamping apparatus, comprising a frame and a stamping mechanism mounted on the frame, the stamping mechanism being adapted to drive a punch to perform a reciprocating vertical lifting motion; characterized in that, The stamping mechanism includes: Drive shaft; the drive shaft is rotatably mounted on the frame; Adjustment assembly; the adjustment assembly is mounted at its first end to a crankshaft section of the drive shaft; and Linkage rod; the second end of the adjusting assembly is hinged to the first end of the linkage rod, and the second end of the linkage rod is hinged to the punch; The adjustment component is adapted to rotate around the crankshaft section at a set angle according to the range extension requirements, such that the hinge position of the adjustment component and the connecting rod is equivalent to the eccentric position of the drive shaft. After the adjustment component completes rotation, it engages in frictional locking with the crankshaft section to meet the set punching force, so that when the resistance of the punch exceeds the set punching force, the adjustment component and the crankshaft section perform overload protection against relative rotation.

2. The stamping equipment as described in claim 1, characterized in that, A first friction disc is provided on the side of the crankshaft section; the adjustment assembly includes: Mounting seat; the mounting seat is sleeved onto the crankshaft section through a first end, the first end of the mounting seat has an internal mounting cavity, and the second end of the mounting seat is used to hinge with the first end of the connecting rod; An elastic friction assembly; the elastic friction assembly is located within the mounting cavity and rotatably mounted on the crankshaft section, and the elastic friction assembly is adapted to perform a circumferential limiting fit with the mounting base; and A drive assembly; the drive assembly is mounted on the mounting base and engages with the elastic friction assembly in a driving manner; the drive assembly is adapted to drive the elastic friction assembly to move axially until the elastic friction assembly and the first friction disc are elastically compressed and frictionally locked.

3. The stamping equipment as described in claim 2, characterized in that, The first friction disc is provided on both sides of the crankshaft section; a pair of elastic friction components are provided, and the two elastic friction components are symmetrically installed on both sides of the crankshaft section. The two elastic friction components cooperate with the drive component at the same time, so that the two elastic friction components move axially towards the first friction disc on the corresponding side under the drive component.

4. The stamping equipment as described in claim 2, characterized in that, The elastic friction assembly includes: A push sleeve; the push sleeve is rotatably mounted on the crankshaft section and engages in transmission with the drive assembly; The second friction disc; the second friction disc is rotatably mounted on the crankshaft section and has an axial sliding fit with the push sleeve, which is circumferentially limited; and Disc spring assembly; the disc spring assembly is sleeved on the crankshaft section and located between the second friction disc and the push sleeve; The push sleeve moves axially under the drive of the drive assembly, and then pushes the second friction disk to frictionally lock with the first friction disk through the disc spring assembly; The impact force corresponding to the frictional locking between the second friction disc and the first friction disc is set by the deformation of the disc spring assembly.

5. The stamping equipment as described in claim 4, characterized in that, The first friction disc includes a first ring disc and a first friction block. The first ring disc is sleeved on the crankshaft section and fixedly installed on the side of the crankshaft section, and the first friction block is disposed on the first ring disc. The second friction disc includes a second ring disc and a second friction block; the second ring disc is rotatably mounted on the crankshaft section and slides in a circumferentially limited manner with the push sleeve, and the second friction block is disposed on the second ring disc and is used to perform frictional engagement with the first friction block; The first friction block is made of resin-based friction material, and the second friction block is made of cast iron material; or, the first friction block is made of cast iron material, and the second friction block is made of resin-based friction material.

6. The stamping equipment as described in claim 2, characterized in that, The driving component includes: Transmission sleeve; the transmission sleeve is rotatably mounted in the mounting cavity and is subject to axial movement limitation; and A driving device; the driving device is fixedly installed on the mounting base and engages with the transmission sleeve in a transmission cooperation, the transmission sleeve being adapted to rotate circumferentially around the mounting cavity under the drive of the driving device. The transmission sleeve and the elastic friction assembly are threaded together so that the elastic friction assembly can move axially under the rotation of the transmission sleeve.

7. The stamping equipment as described in claim 6, characterized in that, The mounting base is provided with a window communicating with the mounting cavity. The driving device is a rotating device and is fixedly installed on the outside of the mounting base. The output end of the driving device is equipped with a worm shaft extending to the window. The outer side of the transmission sleeve is provided with a gear tooth section that engages with the worm shaft for transmission.

8. The stamping equipment according to any one of claims 1-7, characterized in that, The drive shaft adopts a segmented structure that is divided into two sections along the middle of the crankshaft section, and the two sections are connected by a spline structure.

9. The stamping equipment as described in claim 1, characterized in that, The stamping mechanism further includes a locking component installed on the punch; when the adjusting component adjusts the angle relative to the crankshaft section according to different stroke requirements, the locking component is adapted to lock the punch and the connecting rod when the stamping mechanism is at its maximum stroke, so that when the drive shaft rotates around the installation position until the distance between the axis of the drive shaft and the first end of the connecting rod meets the stroke requirements, the locking component is controlled to release the lock on the connecting rod after the adjusting component completes friction locking.

10. The stamping equipment as described in claim 9, characterized in that, The second end of the connecting rod is provided with a locking hole; the locking component includes: The locking component includes: Guide seat; the guide seat is fixedly installed on the punch; Locking rod; the locking rod is vertically slidably mounted on the guide seat, and the locking rod and the guide seat are axially elastically connected by a spring; Telescopic device; the telescopic device is fixedly installed on the punch and drives the locking rod through its output end; The locking rod is adapted to be inserted into the lock hole for locking when the output end of the telescopic device is extended; The locking lever is adapted to disengage from the lock hole by the restoring force of the spring when the output end of the telescopic device is retracted, thereby releasing the lock.

Images