Plate shearing machine for centrifugal pump base production

Abstract

The present application relates to sheet metal shearing processing equipment technical field, provide a kind of shearing machine for centrifugal pump base production, including the mainframe with workbench, cutting unit and feeding unit;Cutting unit includes drive assembly, material blocking component, cutter assembly and auxiliary assembly, material blocking component integrates follow-up material supporting structure and the buffer positioning structure that can elastically yield, can be respectively received long thin plate tail to avoid dead weight bending, absorption extrusion force of excessive feeding to prevent plate arch bending, while auxiliary assembly can drive cutter assembly synchronous adjustment shearing station according to buffer yield amount, compensate positioning dimensional deviation.The present application can simultaneously realize plate anti-deformation protection and high-precision shearing, adapt to the blanking processing of multiple specifications sheet metal parts of centrifugal pump base.

Description

Technical Field

[0001] This invention relates to the field of sheet metal shearing equipment technology, and in particular to a shearing machine for producing centrifugal pump bases. Background Technology

[0002] In the production process of centrifugal pump bases, the cutting of sheet metal parts such as base plates, reinforcing ribs, and foot plates to size is a critical step, usually completed by a shearing machine. The positioning accuracy of the back gauge mechanism and the stability of the feeding process directly determine the dimensional accuracy and finished product quality of the cut parts, thus affecting the efficiency of subsequent welding and assembly and the yield rate of the finished product. Existing conventional shearing machines mostly adopt a rigid back gauge structure, adjusting the front and rear positions of the gauge through a screw drive mechanism to adapt to different shearing requirements. However, this approach still has shortcomings when practically applied to the processing of thin sheet metal parts for centrifugal pump bases. For thin sheet materials with long lengths, the tail end is prone to bending and deformation, which can not only cause deviations in positioning dimensions, but also cause irreversible plastic deformation of the sheet material, leading to the scrapping of parts. Summary of the Invention

[0003] The purpose of this invention is to solve the problem that thin tail sections with large lengths are prone to bending and deformation, and to provide a shearing machine for the production of centrifugal pump bases.

[0004] The technical solution adopted by this invention to solve its technical problem is: a shearing machine for producing centrifugal pump bases, comprising a main frame with a worktable, a feed end plate, a protective plate, a collecting plate, a control box, and a hydraulic press driven by a three-phase asynchronous motor. The hydraulic press consists of a hydraulic pump and a shearing hydraulic cylinder, and further includes: A cutting unit is installed at the output end of the hydraulic pump, and a feeding unit is installed on the top of the worktable; The cutting unit includes a first support plate, a drive assembly disposed on the outer surface of the first support plate, a material stop assembly disposed on the drive assembly, a second support plate fixed on the outer surface of the first support plate, multiple sets of first damping springs fixed on the bottom of the second support plate, a fixed pressure plate fixed under each set of first damping springs, and a cutter assembly and an auxiliary assembly disposed on the bottom of the first support plate. The material blocking assembly includes an L-shaped plate with a horizontal groove and a vertical groove, a bottom plate slidably connected to the inner wall of the horizontal groove, positioning arms symmetrically fixed at both ends of the bottom plate, a guide roller rotatably connected to the outer surface of the bottom plate, first guide posts evenly arranged on the inner wall of the vertical groove, a moving block slidably connected to the outer surface of the guide post, a buffer plate fixed to the bottom of the moving block, a reset spring fixed to the back of the buffer plate, and a displacement sensor fixed to the inner wall of the vertical groove and arranged above each set of first guide posts. The buffer plate can elastically retract along the first guide post via a movable block to absorb the axial extrusion force generated by excessive feeding by manual labor or the feeding unit, preventing the plate from being squeezed and warped. The displacement sensor is used to detect the amount of retraction displacement of the buffer plate. The auxiliary component drives the cutting assembly to synchronously adjust the shearing position according to the amount of displacement, so that the distance between the material stop positioning surface and the shearing blade edge remains constant. When the buffer plate retracts due to excessive feeding, the shearing position is adjusted synchronously to keep the distance between the material stop positioning surface and the shearing blade edge constant, ensuring the accuracy of the cutting length.

[0005] Preferably, the top of the first support plate is fixedly connected to the output end of the hydraulic press, the L-shaped plate is disposed on the drive assembly, the top of the positioning arm is fixedly connected to the bottom of the first support plate, and the end of the return spring away from the buffer plate is fixedly connected to the inner wall of the vertical groove.

[0006] Preferably, each group of displacement sensors is connected by wires, and an information processor is fixedly connected to the outside of one of the displacement sensors.

[0007] Preferably, the drive assembly includes a first guide plate, a first servo motor fixed to the outer surface of the first guide plate, a first reciprocating lead screw fixed to the output end of the first servo motor, and a first lead screw nut that is threadedly engaged with the first reciprocating lead screw.

[0008] Preferably, the outer surface of the first guide plate is fixedly connected to the outer surface of the first support plate, and the bottom of the first lead screw nut is fixedly connected to the outer surface of the L-shaped plate.

[0009] Preferably, the cutting assembly includes a bottom groove, a second guide post fixed to the inner wall of the bottom groove, four sets of second damping springs disposed in the bottom groove, a blade holder base fixed to one end of the second damping springs, a blade plate fixed to the bottom of the blade holder base, and side blocks symmetrically fixed to the two sides of the blade holder base. The outer surface of the side block is provided with a cross groove, the bottom groove is provided at the bottom of the first support plate, the inner wall of the tool holder base is slidably connected to the outer surface of the second guide post, and the second damping spring abuts against the inner wall of the bottom groove and the tool holder base.

[0010] Preferably, the auxiliary component includes an electric cylinder, a second servo motor that drives the electric cylinder, a piston rod disposed at the output end of the electric cylinder, and a cross block fixed to one end of the piston rod; The electric cylinder and the second servo motor are both fixed to the bottom of the first support plate, and the cross block is adapted to the cross groove.

[0011] Preferably, the feeding unit includes a track plate, a third servo motor fixed on the track plate, a second reciprocating lead screw fixed on the output end of the third servo motor, a second lead screw nut that is threadedly engaged with the second reciprocating lead screw, a support rod fixed on the top of the second lead screw nut, a clamping assembly disposed on the top of the support rod, and a first guide rod fixed on the inner wall of the track plate, wherein the inner wall of the second lead screw nut is slidably connected to the outer surface of the first guide rod.

[0012] Preferably, the clamping assembly includes a second guide plate, a second guide rod fixed to the inner wall of the second guide plate, two clamping plates symmetrically slidably sleeved on the outer side of the second guide rod, a side plate fixed to the top of the clamping plate, a telescopic spring fixed to the top of the side plate, a handle plate fixed to the top of the telescopic spring, an insertion post fixed to the bottom of the handle plate, and a positioning plate fixed to the outer surface of the second guide plate. The opposing sides of the two clamping plates are clamping surfaces, and the outer surface of the positioning plate is provided with limiting holes.

[0013] Preferably, the outer surface of the track plate is fixedly connected to the top of the workbench, and the insertion post is adapted to the limiting hole.

[0014] The beneficial effects of this invention are as follows: (1) The bottom plate and guide roller structure that move synchronously with the material blocking assembly realizes the supporting and guiding function of the suspended tail of the long and thin plate, effectively offsets the influence of the plate's own weight, avoids the long and thin plate from bending and deforming downward due to its own weight, and ensures the accuracy of the positioning dimensions and the quality of the plate surface; the buffer plate structure supported by the moving block, guide column and reset spring realizes the elastic absorption function of the axial extrusion force of excessive feeding, alleviates the hard impact of the plate on the material blocking surface, and prevents the thin plate from buckling and arching due to excessive feeding.

[0015] (2) By detecting the retraction displacement of the buffer plate by a displacement sensor and cooperating with the auxiliary component structure composed of a cross block driven by an electric cylinder and adapted to the cross groove of the blade holder base, the synchronous fine adjustment function of the shearing station with the amount of buffer retraction is realized, so that the distance between the material stop positioning surface and the shearing blade edge is always kept constant, accurately compensating for the dimensional deviation caused by the buffer retraction, and ensuring the cutting length accuracy while preventing extrusion deformation. Attached Figure Description

[0016] Figure 1 This is a front structural diagram of the present invention.

[0017] Figure 2 This is a schematic diagram of the rear structure of the present invention.

[0018] Figure 3 This is a cross-sectional view of the structure of the present invention.

[0019] Figure 4This is a schematic diagram of one side of the cutting unit of the present invention.

[0020] Figure 5 This is a schematic diagram of the other side of the cutting unit of the present invention.

[0021] Figure 6 This is a top view of the material blocking assembly of the present invention.

[0022] Figure 7 This is a cross-sectional view of the material blocking assembly of the present invention.

[0023] Figure 8 This is a partial structural schematic diagram of the material blocking assembly of the present invention.

[0024] Figure 9 This is a schematic diagram of the structure of the driving component of the present invention.

[0025] Figure 10 This is a schematic diagram of the cutting assembly of the present invention.

[0026] Figure 11 This is a schematic diagram of the structure of the auxiliary component of the present invention.

[0027] Figure 12 This is a schematic diagram of the feeding unit of the present invention.

[0028] Figure 13 This is a schematic diagram of the clamping component of the present invention.

[0029] In the diagram: 1. Main frame; 2. Workbench; 3. Feeding unit; 4. Feeding end plate; 5. Protective plate; 6. Hydraulic press; 7. Cutting unit; 8. Three-phase asynchronous motor; 9. Control box; 10. Collection plate; 11. Control panel; 71. First support plate; 72. Drive assembly; 73. Material blocking assembly; 74. Second support plate; 75. First damping spring; 76. Fixed pressure plate; 77. Cutting blade assembly; 78. Auxiliary assembly; 731. L-shaped plate; 732. Horizontal groove; 733. Base plate; 734. Vertical groove; 735. First guide column; 736. Moving block; 737. Buffer plate; 738. Displacement sensor; 739. Wire; 7310. Information processor; 7311. Guide roller; 7312. Positioning arm; 7313. Return spring; 721. First guide plate; 72 2. First servo motor; 723. First reciprocating lead screw; 724. First lead screw nut; 771. Bottom groove; 772. Second damping spring; 773. Tool holder base; 774. Tool plate; 775. Side block; 776. Cross groove; 777. Second guide post; 781. Electric cylinder; 782. Second servo motor; 783. Piston rod; 784. Cross block; 31. Track plate; 32. Third servo motor; 33. Second reciprocating lead screw; 34. Second lead screw nut; 35. First guide rod; 36. Support rod; 37. Clamping assembly; 371. Second guide plate; 372. Second guide rod; 373. Clamping plate; 374. Clamping surface; 375. Side plate; 376. Telescopic spring; 377. Handle plate; 378. Insertion post; 379. Positioning plate; 3710. Limiting hole. Detailed Implementation

[0030] Existing conventional shearing machines mostly use a rigid back gauge structure combined with manual or semi-automatic feeding to achieve length positioning. To adapt to different cutting lengths, the back gauge is usually adjusted in front and behind via a screw mechanism. When processing thin sheets with long lengths, the tail of the sheet extends beyond the two sides of the worktable and is suspended in the air. Under its own weight, it is prone to downward bending deformation, which can cause positioning dimension deviations and may also lead to irreversible plastic deformation of the sheet, affecting the quality of the finished product. Another situation is that overfeeding can easily occur during manual or automatic feeding. After the end face of the sheet is rigidly pressed against the rigid back gauge surface, the continuous axial extrusion force can easily cause the thin sheet to bend upward. To address the above two bending situations of thin sheets, a shearing machine for the production of centrifugal pump bases is proposed. Figures 1-3 As shown, it includes: The shearing machine includes a main frame 1 with a workbench 2, a feed end plate 4, a protective plate 5, a collection plate 10, a control box 9, and a hydraulic press 6 driven by a three-phase asynchronous motor 8. The hydraulic press 6 consists of a hydraulic pump and a shearing hydraulic cylinder. The feed end plate 4 is fixedly connected to the outer surface of the workbench 2. The protective plate 5 can be installed on the outer surface of the feed end plate 4 to prevent the waste material from the sheared sheet from splashing. The collection plate 10 is placed at the bottom of the main frame 1. The control box 9 is fixed to the outer surface of the main frame 1. The three-phase asynchronous motor 8 and the hydraulic press 6 are fixed to the top of the main frame 1. The shearing machine also includes: The cutting unit 7 is located at the output end of the hydraulic pump and the feeding unit 3 is located on the top of the worktable 2; The operation and control of the whole machine are completed through the control box 9. The three-phase asynchronous motor 8 drives the hydraulic press 6, which is composed of a hydraulic pump and a shearing hydraulic cylinder, to operate, providing stable shearing power to the cutting unit 7 located at the output end of the hydraulic pump. The sheet material to be sheared is guided into the workbench 2 by the feeding end plate 4 fixed on the outer surface of the workbench 2. After being transported to the shearing station by the feeding unit 3 at the top of the workbench 2, the cutting unit 7 descends to complete the cutting of the sheet material. The finished product and waste material fall into the collection plate 10 at the bottom of the main frame 1 for unified collection, which is convenient for subsequent material handling.

[0031] like Figure 12 As shown, the feeding unit 3 includes a track plate 31, a third servo motor 32 fixed to the track plate 31, a second reciprocating lead screw 33 fixed to the output end of the third servo motor 32, a second lead screw nut 34 threadedly engaged with the second reciprocating lead screw 33, a support rod 36 fixed to the top of the second lead screw nut 34, a clamping assembly 37 set on the top of the support rod 36, and a first guide rod 35 fixed to the inner wall of the track plate 31. The inner wall of the second lead screw nut is slidably connected to the outer surface of the first guide rod 35.

[0032] like Figure 13 As shown, the clamping assembly 37 includes a second guide plate 371, a second guide rod 372 fixed to the inner wall of the second guide plate 371, two clamping plates 373 symmetrically slidably sleeved on the outer side of the second guide rod 372, a side plate 375 fixed to the top of the clamping plate 373, a telescopic spring 376 fixed to the top of the side plate 375, a handle plate 377 fixed to the top of the telescopic spring 376, an insertion post 378 fixed to the bottom of the handle plate 377, and a positioning plate 379 fixed to the outer surface of the second guide plate 371. The opposing sides of the two clamping plates 373 are clamping surfaces 374, and the outer surface of the positioning plate 379 is provided with limiting holes 3710.

[0033] During feeding, first lift the handle plate 377 upwards, causing the insertion post 378 to disengage from the limiting hole 3710 on the positioning plate 379. Then, slide along the second guide rod 372 to adjust the distance between the two clamping plates 373. This allows for flexible adaptation to different widths of materials to be sheared, meeting the feeding requirements of various specifications of centrifugal pump base parts. After placing the material between the two clamping plates 373, release the handle plate 377. The telescopic spring 376 rebounds, causing the insertion post 378 to insert into the corresponding limiting hole 3710 to complete the locking. This ensures that the clamping surfaces 374 of the two clamping plates 373 clamp the sides of the material, resulting in a stable and reliable clamping state that prevents the material from shifting or slipping during feeding. Subsequently, the third servo motor 32 starts, driving the second reciprocating lead screw 33 to rotate. Through the threaded transmission, the second lead screw nut 34 moves smoothly and linearly along the first guide rod 35. Then, through the support rod 36, the clamping assembly 37 and the clamped plate are fed along the track plate 31 to the shearing station. The lead screw transmission has high positioning accuracy, and the guiding constraint of the first guide rod 35 can effectively eliminate running sway. It not only replaces manual pushing of materials, reducing the labor intensity of operators and the safety risk of hands approaching the blade, but also ensures the dimensional accuracy of the feeding and improves the dimensional consistency of batch shearing.

[0034] During the aforementioned feeding process, there is still a possibility of overfeeding due to operational errors: if the operator accidentally touches the feed button in manual inching mode and fails to release it in time, or if the servo system is improperly adjusted and overshoot occurs due to inertia at the end of the feeding position, both will result in overfeeding. Overfeeding will cause the front end of the sheet metal to rigidly abut against the back gauge positioning surface. The continuous axial compressive force can easily cause the sheet metal to buckle and arch, especially thin rib plates in the production of centrifugal pump bases, which are more prone to irreversible plastic deformation and scrapping. At the same time, long-term hard impact will also accelerate the wear of the back gauge mechanism, resulting in a decrease in positioning accuracy.

[0035] The outer surface of the track plate 31 is fixedly connected to the top of the workbench 2, and the insertion post 378 is adapted to the limiting hole 3710.

[0036] like Figures 4-5 As shown, the cutting unit 7 includes a first support plate 71, a drive assembly 72 disposed on the outer surface of the first support plate 71, a stop assembly 73 disposed on the drive assembly 72, a second support plate 74 fixed to the outer surface of the first support plate 71, multiple sets of first damping springs 75 fixed to the bottom of the second support plate 74, a fixing pressure plate 76 fixed under each set of first damping springs 75, and a cutter assembly 77 and an auxiliary assembly 78 disposed at the bottom of the first support plate 71. Before operation, based on the cutting length requirements of the parts corresponding to the centrifugal pump base, the drive assembly 72 moves the stop assembly 73 along the plate feeding direction to the target position, completing the pre-positioning of the cutting length. The feeding unit 3 conveys the plate forward to the end, where it abuts against the stop assembly 73. Then, the shearing hydraulic cylinder drives the first support plate 71 to descend as a whole. During the descent, the fixed pressure plate 76 contacts the upper surface of the plate first. As the first support plate 71 continues to descend, the multiple sets of first damping springs 75 under the second support plate 74 are gradually compressed. The elastic clamping force of the springs stably presses the plate onto the worktable 2, preventing the plate from slipping or warping during the shearing process and ensuring the quality of the sheared section. After the plate is pressed, the cutter assembly 77 continues to descend with the first support plate 71, cooperating with the lower cutting edge at the worktable 2 to complete the shearing operation of the plate.

[0037] When overfeeding occurs, the material stop assembly 73 can elastically retract to absorb axial compressive force and prevent the sheet material from being squeezed and warped. At the same time, the auxiliary assembly 78 drives the cutter assembly 77 to synchronously adjust the shearing position, compensate for the dimensional deviation caused by the retraction of the material stop assembly 73, keep the distance between the material stop positioning surface and the shearing blade constant, and ensure the accuracy of the cutting length.

[0038] like Figure 9 As shown, the drive assembly 72 includes a first guide plate 721, a first servo motor 722 fixed to the outer surface of the first guide plate 721, a first reciprocating lead screw 723 fixed to the output end of the first servo motor 722, and a first lead screw nut 724 that is threadedly engaged with the first reciprocating lead screw 723.

[0039] When adjusting the cutting length, the first servo motor 722, fixed on the first guide plate 721, receives the control signal and outputs rotational power, driving the first reciprocating screw 723 to rotate synchronously. The first reciprocating screw 723 drives the first screw nut 724 to move through the threaded transmission. Under the guidance and constraint of the first guide plate 721, the first screw nut 724 converts the rotational motion of the screw into linear reciprocating motion along the feed direction of the sheet material, thereby driving the L-shaped plate and the entire set of material stop assembly 73 fixed to it to move back and forth synchronously, so as to achieve precise adjustment of different cutting lengths.

[0040] The outer surface of the first guide plate 721 is fixedly connected to the outer surface of the first support plate 71, and the bottom of the first lead screw nut 724 is fixedly connected to the outer surface of the L-shaped plate 731.

[0041] like Figures 7-8As shown, the material blocking assembly 73 includes an L-shaped plate 731 with a horizontal groove 732 and a vertical groove 734, a bottom plate 733 slidably connected to the inner wall of the horizontal groove 732, positioning arms 7312 symmetrically fixed at both ends of the bottom plate 733, a guide roller 7311 rotatably connected to the outer surface of the bottom plate 733, first guide posts 735 evenly arranged on the inner wall of the vertical groove 734, a moving block 736 slidably connected to the outer surface of the guide posts, a buffer plate 737 fixed to the bottom of the moving block 736, a reset spring 7313 fixed to the back of the buffer plate 737, and a displacement sensor 738 fixed to the inner wall of the vertical groove 734 and arranged above each set of first guide posts 735. After the material stop assembly 73 moves to the set position corresponding to the cutting length along with the drive assembly 72, the bottom plate 733, which is slidably installed in the L-shaped plate transverse groove 732, forms a stable guide support through the positioning arms 7312 at both ends. The guide roller 7311, which is rotatably mounted on it, is positioned synchronously with the L-shaped plate. It can support the tail of the long and thin plate extending from the two sides of the worktable, preventing the long plate from bending and deforming downward due to its own weight. At the same time, the rolling contact of the guide roller 7311 can reduce the frictional resistance when the plate is fed, ensuring smooth plate feeding and plate surface quality.

[0042] During normal feeding, the end of the sheet metal abuts against the buffer plate 737 to complete end face positioning. The preload provided by the return spring 7313 maintains the reference position of the buffer plate 737 and ensures positioning accuracy. When there is manual or excessive feeding by the feeding unit 3, the axial extrusion force exceeds the preload of the return spring 7313. The buffer plate 737 drives the moving block 736 to elastically retract along the first guide post 735 in the vertical groove 734, absorbing the redundant axial extrusion force. This effectively prevents the sheet metal, especially the thin ribs in the production of centrifugal pump bases, from buckling and arching deformation due to extrusion, reducing the scrap rate of thin sheets. At the same time, it alleviates the hard impact of the sheet metal on the retaining structure, reduces mechanical wear, and extends service life. During the retraction process, the displacement sensor 738 located above the first guide post 735 detects the retraction displacement of the buffer plate 737 in real time and transmits the displacement signal to the auxiliary component 78, which then... The auxiliary component 78 drives the cutting component 77 to synchronously adjust the shearing position, so that the distance between the stop positioning surface and the shearing blade edge remains constant, thereby compensating for the dimensional changes caused by the buffer retreat. The displacement sensor 738 detects the displacement of the buffer plate 737 in real time and transmits the signal to the information processor 7310. The information processor 7310 has a preset compensation algorithm to calculate the required horizontal displacement of the cutting component and send a pulse signal to the second servo motor 782 to control the electric cylinder 781 to extend and retract the piston rod 783, which pushes the blade holder base 773 to move through the cross block 784 until the shearing blade edge and the stop positioning surface return to the set distance. This signal control is existing technology and will not be described in detail here.

[0043] The top of the first support plate 71 is fixedly connected to the output end of the hydraulic press 6. The L-shaped plate 731 is set on the drive assembly 72. The top of the positioning arm 7312 is fixedly connected to the bottom of the first support plate 71. The end of the return spring 7313 away from the buffer plate 737 is fixedly connected to the inner wall of the vertical groove 734.

[0044] Each group of displacement sensors 738 is connected to each other by wires 739, and an information processor 7310 is fixedly connected to the outside of one of the displacement sensors 738.

[0045] like Figure 10 As shown, the cutter assembly 77 includes a bottom groove 771, a second guide post 777 fixed to the inner wall of the bottom groove 771, four sets of second damping springs 772 disposed in the bottom groove 771, a cutter holder base 773 fixed to one end of the second damping springs 772, a cutter plate 774 fixed to the bottom of the cutter holder base 773, and side blocks 775 symmetrically fixed to the two sides of the cutter holder base 773. The outer surface of the side block 775 is provided with a cross groove 776, the bottom groove 771 is provided at the bottom of the first support plate 71, the inner wall of the tool holder base 773 is slidably connected to the outer surface of the second guide post 777, and the second damping spring 772 abuts against the inner wall of the bottom groove 771 and the tool holder base 773.

[0046] During normal shearing operations, the cutter assembly 77 descends along with the first support plate 71. The second guide post 777 inside the bottom groove 771 provides precise sliding guidance for the blade holder base 773. In conjunction with the second damping spring 772 that abuts against the bottom groove 771 and the blade holder base 773, the downward shearing process of the blade 774 is smooth, buffered, and shock-absorbing, effectively reducing shearing impact vibration, avoiding rigid collision damage to the blade 774, and ensuring a smooth and clean sheared section of the plate.

[0047] like Figure 11 As shown, the auxiliary component 78 includes an electric cylinder 781, a second servo motor 782 that drives the electric cylinder 781, a piston rod 783 disposed at the output end of the electric cylinder 781, and a cross block 784 fixed to one end of the piston rod 783. The electric cylinder 781 and the second servo motor 782 are both fixed to the bottom of the first support plate 71, and the cross block 784 is adapted to the cross groove 776.

[0048] During manual or automatic feeding, overfeeding can easily occur due to operational errors or system inertia. The hard impact of the sheet end against the rigid stop surface, coupled with continuous axial pressure, can easily cause buckling and warping of the thin sheet. Therefore, a stop assembly 73 with elastic yielding function is installed to absorb the axial pressure and solve the problem of buckling and warping. However, as the buffer plate 737 retracts, it changes the distance between the stop positioning surface and the shearing blade, directly causing the actual shearing length to deviate from the set value, resulting in a decrease in the accuracy of the blanking dimensions. This makes it impossible to simultaneously meet the requirements of deformation prevention and high precision. To address the challenge of meeting the processing requirements, this device employs an auxiliary component 78 and a cutting component 77 to form a linkage compensation structure. The second servo motor 782 drives the electric cylinder 781 to operate, pushing the cross block 784 at the end of the piston rod 783 into the cross groove 776 of the side block 775 of the tool holder base 773. Through the precise engagement of the cross block 784 and the cross groove 776, the tool holder base 773 undergoes a slight sliding adjustment along the second guide post 777, precisely compensating for the dimensional deviation caused by the retraction of the buffer plate 737 and matching the actual positioning position of the plate material in real time.

[0049] The linkage structure is limited and guided by the second guide post 777, and the second damping spring 772 can effectively absorb shear vibration and adjust gap stress, thereby improving the running stability of the blade 774. At the same time, relying on the electric precision micro-adjustment function of the auxiliary component 78, it can adapt to the material blocking buffer retraction amount in real time, completely solving the problem of shearing size deviation caused by traditional buffer blocking. There is no need for manual secondary calibration of the size, which not only eliminates the extrusion deformation of the plate caused by overfeeding, but also ensures the shearing size accuracy of the plate throughout the process.

[0050] The working principle of this invention is as follows: First, the distance between the two clamping plates 373 is adjusted, and the side of the plate is clamped by the insertion of the insertion post 378 and the limiting hole 3710. Then, the third servo motor 32 drives the second reciprocating screw 33 to rotate, which drives the second screw nut 34 and the clamping assembly 37 to feed smoothly along the first guide rod 35, conveying the plate to the end to abut against the buffer plate 737 to complete the end face positioning. If overfeeding occurs, the buffer plate 737 compresses the return spring 7313 and elastically retracts along the first guide post 735 to absorb the redundant axial compressive force to prevent the plate from buckling and arching. At the same time, the displacement sensor 738 detects the retraction displacement of the buffer plate 737 in real time and outputs a signal to control the second servo motor. The electric cylinder 781 is driven by the 782, which drives the blade holder base 773 to slide synchronously along the second guide post 777 through the cooperation of the cross block 784 and the cross groove 776. This causes the shearing blade to move backward synchronously with the material stop positioning surface, keeping the distance between the two constant to compensate for dimensional deviations. After positioning, the shearing hydraulic cylinder drives the first support plate 71 to move downward as a whole. The fixed pressure plate 76 first presses and fixes the plate through the elastic force of the first damping spring 75. Then the blade 774 moves downward to complete the shearing of the plate. The cut finished product and waste fall into the collection plate 10 at the bottom of the main frame 1 for unified collection. While achieving dual protection against sagging and arching of long and thin plates, the synchronous compensation at the work station ensures the accuracy of the shearing dimensions.

[0051] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the term "fixed connection" should be interpreted broadly. For example, it can refer to a bolted connection, a welded connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0052] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A shearing machine for producing centrifugal pump bases, comprising a main frame with a worktable, a feed end plate, a protection plate, a collection plate, a control box, and a hydraulic press driven by a three-phase asynchronous motor, characterized in that... It also includes: a material stop assembly, a cutting blade assembly, and auxiliary components disposed in the cutting unit; The hydraulic press drives the cutting blade assembly to move downward to cut the sheet metal; Before cutting the sheet metal, the shearing machine positions the feeding direction of the sheet metal end through a material stop assembly, and through the linkage and adaptation of the auxiliary component with the material stop assembly, the distance between the material stop positioning surface and the shearing blade edge is kept constant.

2. The shearing machine for producing centrifugal pump bases according to claim 1, characterized in that, The cutting unit is located at the output end of the hydraulic pump; The cutting unit includes a first support plate, a drive assembly disposed on the outer surface of the first support plate, a material stop assembly disposed on the drive assembly, a second support plate fixed on the outer surface of the first support plate, multiple sets of first damping springs fixed on the bottom of the second support plate, a fixed pressure plate fixed under each set of first damping springs, and a cutter assembly and an auxiliary assembly disposed on the bottom of the first support plate.

3. A shearing machine for producing centrifugal pump bases according to claim 2, characterized in that, The material blocking assembly includes an L-shaped plate with a horizontal groove and a vertical groove, a bottom plate slidably connected to the inner wall of the horizontal groove, positioning arms symmetrically fixed at both ends of the bottom plate, a guide roller rotatably connected to the outer surface of the bottom plate, first guide posts evenly arranged on the inner wall of the vertical groove, a moving block slidably connected to the outer surface of the guide post, a buffer plate fixed to the bottom of the moving block, a reset spring fixed to the back of the buffer plate, and a displacement sensor fixed to the inner wall of the vertical groove and arranged above each set of first guide posts. The top of the first support plate is fixedly connected to the output end of the hydraulic press, the L-shaped plate is set on the drive assembly, the top of the positioning arm is fixedly connected to the bottom of the first support plate, and the end of the return spring away from the buffer plate is fixedly connected to the inner wall of the vertical groove.

4. A shearing machine for producing centrifugal pump bases according to claim 2, characterized in that, The drive assembly includes a first guide plate, a first servo motor fixed to the outer surface of the first guide plate, a first reciprocating lead screw fixed to the output end of the first servo motor, and a first lead screw nut that is threadedly engaged with the first reciprocating lead screw.

5. A shearing machine for producing centrifugal pump bases according to claim 4, characterized in that, The outer surface of the first guide plate is fixedly connected to the outer surface of the first support plate, and the bottom of the first lead screw nut is fixedly connected to the outer surface of the L-shaped plate.

6. A shearing machine for producing centrifugal pump bases according to claim 1, characterized in that, The cutting assembly includes a bottom groove, a second guide post fixed to the inner wall of the bottom groove, four sets of second damping springs disposed in the bottom groove, a blade holder base fixed to one end of the second damping spring, a blade plate fixed to the bottom of the blade holder base, and side blocks symmetrically fixed to the two blade holder bases on both sides. The outer surface of the side block is provided with a cross groove, the bottom groove is provided at the bottom of the first support plate, the inner wall of the tool holder base is slidably connected to the outer surface of the second guide post, and the second damping spring abuts against the inner wall of the bottom groove and the tool holder base.

7. A shearing machine for producing centrifugal pump bases according to claim 6, characterized in that, The auxiliary components include an electric cylinder, a second servo motor that drives the electric cylinder, a piston rod disposed at the output end of the electric cylinder, and a cross block fixed to one end of the piston rod; The electric cylinder and the second servo motor are both fixed to the bottom of the first support plate, and the cross block is adapted to the cross groove.

8. A shearing machine for producing centrifugal pump bases according to claim 1, characterized in that, The top of the workbench is symmetrically provided with feeding units. The feeding unit includes a track plate, a third servo motor fixed on the track plate, a second reciprocating lead screw fixed on the output end of the third servo motor, a second lead screw nut that is threadedly driven with the second reciprocating lead screw, a support rod fixed on the top of the second lead screw nut, a clamping assembly provided on the top of the support rod, and a first guide rod fixed on the inner wall of the track plate. The inner wall of the second lead screw nut is slidably connected to the outer surface of the first guide rod.

9. A shearing machine for producing centrifugal pump bases according to claim 8, characterized in that, The clamping assembly includes a second guide plate, a second guide rod fixed to the inner wall of the second guide plate, two clamping plates symmetrically slidably sleeved on the outer side of the second guide rod, a side plate fixed to the top of the clamping plate, a telescopic spring fixed to the top of the side plate, a handle plate fixed to the top of the telescopic spring, an insertion post fixed to the bottom of the handle plate, and a positioning plate fixed to the outer surface of the second guide plate. The opposing sides of the two clamping plates are clamping surfaces, and the outer surface of the positioning plate is provided with limiting holes.

10. A shearing machine for producing centrifugal pump bases according to claim 9, characterized in that, The outer surface of the track plate is fixedly connected to the top of the workbench, and the insertion post is adapted to the limiting hole.

Images