Punching machine worktable grinding device

Abstract

The present application relates to the field of grinding technology, discloses a punch press workbench grinding device, including bed body, the bed body is provided with lower work surface and upper work surface respectively, the lower work surface is placed with the bottom support plate, the top of the bottom support plate is slidably connected with the middle support plate, the middle support plate is slidably connected with the small support plate, the top of the small support plate is fixedly connected with the fixed seat, the top of the fixed seat is rotatably connected with the rotating seat, the inner top wall of the fixed seat is rotatably connected with the sleeve, the bottom end of the sleeve is fixedly connected with the bevel gear A, the inner wall of the fixed seat is rotatably connected with the bevel gear B meshing with the bevel gear A, the punch press workbench grinding device, the shaft drives the bevel gear B to rotate, so as to drive the bevel gear A and the sleeve to rotate, at this time, the sleeve can drive the rotating seat to rotate, so as to change the orientation of the grinding wheel, by changing the orientation of the grinding wheel, the grinding direction of the grinding wheel to the workpiece is changed, and the uniformity of the grinding wheel to the workpiece is improved.

Description

Technical Field

[0001] This invention relates to the field of grinding technology, specifically to a grinding device for a punch press worktable. Background Technology

[0002] A punch press, also known as a stamping machine, is a metal stamping machine tool mainly used to form metal sheets or punch holes in metal sheets. The punch press mainly works by applying pressure to the material in conjunction with a die, causing it to plastically deform and obtain the required shape and precision. Punch presses are widely used in many fields such as metal processing, automobile manufacturing, aerospace, and electronics. A punch press is generally divided into a lower working surface and an upper working surface. A bottom die is installed on the lower working surface and a top die is installed on the upper working surface. After the workpiece is punched, the top of the workpiece in the bottom die and the bottom of the workpiece in the top die need to be ground. Grinding of punch press workpieces is an important process. It has a significant impact on improving workpiece quality, extending the service life of the die, and optimizing production efficiency. The purpose of grinding is mainly to improve the surface finish and precision of the workpiece, remove defects on the workpiece surface, and extend the service life of the die. When grinding a punch press, the workpiece inside the bottom die is usually ground in advance. However, when grinding the top die, the workpiece inside the top die is still located on the upper working surface of the punch press, and the operator cannot directly see the bottom of the workpiece. Furthermore, due to the limited working space of the punch press, manual grinding is dangerous and inconvenient, making the grinding of the bottom of the workpiece quite difficult. Therefore, we propose a punch press worktable grinding device. Summary of the Invention

[0003] The purpose of this invention is to provide a grinding device for a punch press worktable to solve the problems mentioned in the background art.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a grinding device for a punch press worktable, comprising a bed, wherein a lower working surface and an upper working surface are respectively provided on the bed, a bottom support plate is placed on the lower working surface, a middle support plate is slidably connected to the top of the bottom support plate, a small support plate is slidably connected to the middle support plate, a fixed seat is fixedly connected to the top of the small support plate, a rotating seat is rotatably connected to the top of the fixed seat, a sleeve is rotatably connected to the inner top wall of the fixed seat, the top end of the sleeve is fixedly connected to the bottom of the rotating seat, a helical gear A is fixedly connected to the bottom end of the sleeve, a helical gear B that meshes with the helical gear A is rotatably connected to one side of the inner wall of the fixed seat, a shaft is rotatably connected to the side of the fixed seat near the helical gear B, and a knob is fixedly connected to the end of the shaft away from the fixed seat, the shaft is fixedly connected to the helical gear B, and a top plate is fixedly connected to the top of the rotating seat; A fixing frame is fixedly connected to the top of the top plate, and a driver is fixedly connected to one side of the top of the fixing frame. A grinding wheel is fixedly connected to the output end of the driver.

[0005] Preferably, the top side of the fixing base has a guide opening with a 90° arc structure, and the inner walls at both ends of the guide opening are fitted with magnet pieces.

[0006] Preferably, a connecting hole is provided between the rotating seat, the top plate and the sleeve, and a mounting cavity communicating with the connecting hole is provided on one side of the top plate. A support frame is fixedly connected to the top of the small support plate near the shaft, and the shaft is located in the support frame and rotatably connected to it.

[0007] Preferably, a guide frame is fixedly connected to the side of the sleeve near the guide opening. A movable cavity is formed inside the guide frame. A connecting rod A is vertically slidably connected inside the movable cavity. A guide rod is fixedly connected to the top end of the connecting rod A near the guide opening. The top end of the guide rod passes through the guide frame and is slidably connected to the inner wall of the guide opening. A transmission rod is slidably connected inside the communicating hole. A limit spring A is fixedly connected between the bottom end of the transmission rod and the inner bottom wall of the sleeve. A connecting rod B is fixedly connected to the top end of the transmission rod near the mounting cavity. The connecting rod B is located inside the mounting cavity and is slidably connected to the inner wall of the mounting cavity.

[0008] Preferably, the bottom support plate has several evenly distributed limiting grooves on the side away from the bed, and both ends of the bottom support plate are threaded with limiting bolts.

[0009] Preferably, a mounting plate is fixedly connected to the side of the middle support plate away from the bed body, and a turntable is rotatably connected to the bottom of the mounting plate, with the height of the turntable being flush with the height of the limiting groove. Several limiting plates evenly distributed in a ring are fixedly connected to the turntable, and a transmission disc is fixedly connected to the top of the mounting plate. Several limiting holes evenly distributed in a ring are provided on the top of the transmission disc, and the included angle between the limiting plates is the same as the included angle between the limiting holes.

[0010] Preferably, a mounting base is fixedly connected to the top of the mounting plate, and a storage groove is provided on the top of the mounting base. A U-shaped rod is slidably connected in the storage groove. The end of the U-shaped rod away from the mounting base is located above the limiting hole on the transmission plate closest to the mounting base. A fixing spring is fixedly connected between the end of the U-shaped rod near the mounting base and the bottom wall of the storage groove.

[0011] Preferably, one side of the middle support plate is rotatably connected to a lead screw via the frame, and a handle is fixedly connected to the end of the lead screw away from the bed.

[0012] Preferably, a transmission frame is fixedly connected to the side of the small support plate near the lead screw, and the transmission frame is sleeved on the lead screw and threadedly connected to it.

[0013] Preferably, a limit spring B is fixedly connected between the top end of the transmission rod and the top wall of the mounting cavity, and a pressure plate is fixedly connected to the end of the connecting rod B away from the transmission rod.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention drives the helical gear B to rotate via a shaft, which in turn drives the helical gear A and the sleeve to rotate. At this time, the sleeve can drive the rotating seat to rotate, thereby changing the orientation of the grinding wheel. By changing the orientation of the grinding wheel, the grinding direction of the grinding wheel on the workpiece is changed, improving the uniformity of grinding. Simultaneously, the sleeve will drive the guide rod to slide along the guide opening. The guide opening and the guide rod cooperate to limit the maximum rotation angle of the rotating seat. When the guide rod moves to the end of the guide opening, it can be attached to the magnetic piece embedded in the end of the guide opening. At this time, the magnetic piece can magnetically attract the guide rod, thereby limiting the rotating seat. This effectively improves the stability of the grinding wheel during the grinding process after the grinding wheel is turned. 2. When the grinding wheel needs to be reoriented, the pressing plate is pressed, which drives the connecting rod B to descend. At this time, the connecting rod B drives the transmission rod to descend synchronously. Simultaneously, the transmission rod drives the connecting rod A to descend along the movable cavity. At this time, the connecting rod A drives the guide rod to descend together, causing the guide rod to move out of the guide port. At this time, the magnetic attraction effect of the magnet on the guide rod disappears, and the rotating seat can continue to be controlled to rotate. During the rotation of the rotating seat, the pressing plate is released. Using the rebound property of the limiting springs A and B, the transmission rod, connecting rod A, guide rod, connecting rod B and the pressing plate are lifted together to their initial positions. At this time, the guide rod will re-insert into the guide port and cooperate with the guide port to restrict the rotation angle of the rotating seat again, effectively improving the auxiliary function of the device when releasing the limit of the rotating seat. 3. When the middle support plate moves along the bottom support plate, the limiting plate and the limiting groove cooperate to make the turntable rotate. At this time, whenever one of the limiting plates is inserted into the corresponding limiting groove, the middle support plate will stop. By setting the interval between the limiting plates to the same distance as the width of the grinding wheel, it can be ensured that each stop of the middle support plate represents the grinding wheel moving a distance equal to its width. At this time, when the grinding wheel is used to grind the workpiece, the problem of missing parts of the workpiece due to the excessive movement distance of the grinding wheel can be avoided, and the auxiliary function of the grinding wheel in grinding the workpiece can be further improved. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2This is a schematic diagram of the base plate structure of the present invention; Figure 3 This is a schematic diagram of the pallet structure in this invention; Figure 4 This is a schematic diagram of the fixing base structure of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the fixing seat of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the guide frame of the present invention; Figure 7 This is a schematic diagram of the mounting plate and its connecting components of the present invention; Figure 8 This is a schematic diagram of the cross-sectional structure of the mounting base of the present invention; Figure 9 For the present invention Figure 5 The diagram shows an enlarged view of area A.

[0016] In the diagram: 1. Bed; 11. Lower working surface; 12. Upper working surface; 2. Bottom support plate; 21. Limiting groove; 22. Limiting bolt; 3. Middle support plate; 31. Mounting plate; 32. Turntable; 33. Limiting plate; 35. Transmission plate; 36. Limiting hole; 4. Mounting seat; 41. Storage slot; 42. U-shaped rod; 43. Fixing spring; 5. Small support plate; 51. Transmission frame; 6. Lead screw; 61. Handle; 7. Fixed seat; 71. Guide port; 72. 73. Magnet plate; 74. Rotating seat; 75. Top plate; 76. Mounting cavity; 77. Sleeve; 78. Helical gear A; 79. Helical gear B; 70. Support frame; 710. Shaft; 81. Connecting hole; 82. Guide frame; 83. Movable cavity; 84. Connecting rod A; 85. Guide rod; 86. Transmission rod; 87. Limiting spring A; 88. Limiting spring B; 89. Connecting rod B; 80. Pressure plate; 91. Fixing frame; 92. Driver; 93. Grinding wheel. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Please see Figure 1-9The present invention provides a technical solution: a grinding device for a punch press worktable, comprising a bed 1, a lower working surface 11 and an upper working surface 12 respectively provided on the bed 1, a bottom support plate 2 placed on the lower working surface 11, limit bolts 22 threadedly connected to both ends of the bottom support plate 2, a middle support plate 3 slidably connected to the top of the bottom support plate 2, a small support plate 5 slidably connected to the middle support plate 3, a fixed seat 7 fixedly connected to the top of the small support plate 5, a rotating seat 73 rotatably connected to the top of the fixed seat 7, a top plate 74 fixedly connected to the top of the rotating seat 73, a fixed frame 9 fixedly connected to the top of the top plate 74, a driver 91 fixedly connected to one side of the top of the fixed frame 9, and a grinding wheel 92 fixedly connected to the output end of the driver 91.

[0019] Furthermore, when grinding the workpiece, the bottom support plate 2 is placed on the lower working surface 11 of the bed 1, and then the bottom support plate 2 is fixed with the limit bolt 22. During the operation, the driver 91 can be turned on to drive the grinding wheel 92 to rotate. When the grinding wheel 92 rotates, it can grind the bottom of the workpiece located on the upper working surface 12. During the grinding operation, the middle support plate 3 can be moved along the bottom support plate 2 to change the lateral position of the grinding wheel 92. The longitudinal position of the grinding wheel 92 can be changed by moving the small support plate 5 along the middle support plate 3. Through this operation, the bottom of the workpiece located on the upper working surface 12 can be ground from all directions using the grinding wheel 92.

[0020] Combined with appendix Figure 4 and Figure 5 As shown, a sleeve 75 is rotatably connected to the inner top wall of the fixed seat 7. The top end of the sleeve 75 is fixedly connected to the bottom of the rotating seat 73. A helical gear A76 is fixedly connected to the bottom end of the sleeve 75. A helical gear B77 that meshes with the helical gear A76 is rotatably connected to one side of the inner wall of the fixed seat 7. A shaft 79 is rotatably connected to the side of the fixed seat 7 near the helical gear B77. A knob is fixedly connected to the end of the shaft 79 away from the fixed seat 7. The shaft 79 is fixedly connected to the helical gear B77. A support frame 78 is fixedly connected to the top of the small support plate 5 near the shaft 79. The shaft 79 is located inside the support frame 78 and is rotatably connected to it. The shaft 79 is relatively long and can extend beyond the lower working surface 11 and the upper working surface 12 of the bed 1. At this time, when the operator adjusts or changes the direction of the grinding wheel 92, he / she does not need to put his / her hand between the lower working surface 11 and the upper working surface 12, which improves the protection of the operator.

[0021] Furthermore, during the grinding process, the helical gear B77 can be rotated by the shaft 79. At this time, the helical gear B77 drives the helical gear A76 and the sleeve 75 to rotate. During the rotation of the sleeve 75, the rotating seat 73 and the top plate 74 can be rotated. At this time, the top plate 74 can drive the fixed frame 9, the driver 91 and the grinding wheel 92 to turn, so that the grinding wheel 92 can change the angle to continue grinding the bottom of the workpiece on the upper working surface 12.

[0022] Combined with appendix Figure 4 , Figure 5 , Figure 6 and Figure 9 As shown, a guide opening 71 with a 90° arc structure is provided on one side of the top of the fixed base 7. Magnet pieces 72 are embedded in the inner walls of both ends of the guide opening 71. A connecting hole 710 is provided between the rotating base 73, the top plate 74, and the sleeve 75. A mounting cavity 741 communicating with the connecting hole 710 is provided on one side of the top plate 74. A guide frame 8 is fixedly connected to the side of the sleeve 75 near the guide opening 71. A movable cavity 81 is provided inside the guide frame 8. A connecting rod A82 is vertically slidably connected inside the movable cavity 81. A guide rod 83 is fixedly connected to the top end of the connecting rod A82 near the guide opening 71. The top end of the guide rod 83 passes through the guide frame 8 and is slidably connected to the inner wall of the guide opening 71. The guide rod 83 is made of metal. When the guide rod 83 is in contact with the magnet 72, the magnet 72 can magnetically attract the guide rod 83, thereby limiting and fixing the guide rod 83, and thus limiting the operation of the rotating seat 73. A transmission rod 84 is slidably connected in the connecting hole 710. A limit spring A85 is fixedly connected between the bottom end of the transmission rod 84 and the inner bottom wall of the sleeve 75. A connecting rod B87 is fixedly connected to the top end of the transmission rod 84 near the mounting cavity 741. The connecting rod B87 is located in the mounting cavity 741 and is slidably connected to the inner wall of the mounting cavity 741. A limit spring B86 is fixedly connected between the top end of the transmission rod 84 and the inner top wall of the mounting cavity 741. A pressure plate 88 is fixedly connected to the end of the connecting rod B87 away from the transmission rod 84.

[0023] Furthermore, during the rotation of the sleeve 75, it can drive the guide frame 8 to rotate together. At this time, the guide rod 83 slides along the guide opening 71. Through the cooperation of the guide opening 71 and the guide rod 83, the maximum rotation angle of the sleeve 75 and the rotating seat 73 is limited to ninety degrees. When the guide rod 83 moves to the end of the guide opening 71, the magnet 72 embedded in the guide opening 71 magnetically attracts the guide rod 83, thereby limiting and fixing the guide rod 83, thus limiting and fixing the sleeve 75 and the rotating seat 73, preventing the rotating seat 73 from rotating on its own during the grinding process due to external forces, and improving the stability of the device during grinding. When it is necessary to rotate the direction of the driver 91 and the grinding wheel 92 again, the operator can press the pressure plate 88, which drives the connecting rod B87 to descend. At this time, the connecting rod B87 drives the transmission rod 84 to descend synchronously. In the process, the transmission rod 84 drives the limit spring B86 to rise and the limit spring A85 to compress and contract. At the same time, the transmission rod 84 drives the connecting rod A82 to descend along the movable cavity 81. At this time, the connecting rod A82 drives the guide rod 83 to descend together, so that the guide rod 83 moves out of the guide port 71 and retracts into the movable cavity 81 of the guide frame 8. At this time, the magnetic attraction effect of the magnet 72 on the guide rod 83 disappears, and the rotating seat 73 can continue to be controlled to rotate. During the rotation of the rotating seat 73, the pressure plate 88 is released. At this time, the limit springs A85 and B86 start to rebound simultaneously, driving the transmission rod 84 to rise to the initial position. At this time, the transmission rod 84 can drive the connecting rod A82, the guide rod 83, the connecting rod B87 and the pressure plate 88 to rise to their initial positions respectively. At this time, the guide rod 83 will re-insert into the guide port 71 and cooperate with the guide port 71 to restrict the rotation angle of the rotating seat 73 again.

[0024] Combined with appendix Figure 1 , Figure 2 , Figure 3 , Figure 7 and Figure 8As shown, the bottom support plate 2 has several evenly distributed limiting grooves 21 on the side away from the bed 1. The middle support plate 3 is fixedly connected to the side away from the bed 1 with a mounting plate 31. A turntable 32 is rotatably connected to the bottom of the mounting plate 31, and the height of the turntable 32 is flush with the height of the limiting grooves 21. Several evenly distributed ring-shaped limiting plates 33 are fixedly connected to the turntable 32. The spacing between each limiting plate 33 is the same as the width of the grinding wheel 92. When the limiting plate 33 rotates with the turntable 32, when the grinding wheel 92 moves a distance equal to its width, a new limiting plate 33 is inserted into the limiting groove 21, thus creating a pause effect on the movement of the middle support plate 3. This means that the grinding wheel 92 has moved exactly the same distance as its width, and the grinding wheel 92 can continue to grind the workpiece using the previous grinding marks, improving the uniformity of grinding the workpiece. A transmission plate 35 is fixedly connected to the top of the mounting plate 31, and the transmission... The top of the disc 35 is provided with several evenly distributed ring-shaped limiting holes 36. The included angle between the limiting plates 33 is the same as the included angle between the limiting holes 36. The top of the mounting plate 31 is fixedly connected to the mounting base 4. The top of the mounting base 4 is provided with a storage groove 41. A U-shaped rod 42 is slidably connected in the storage groove 41. The U-shaped rod 42 is vertically slidably connected. Through the cooperation of the sliding groove and the slider, the U-shaped rod 42 cannot rotate, but can only slide up and down. At this time, when the U-shaped rod 42 is inserted... After the transmission disc 35 is inserted into the limiting hole 36, the U-shaped rod 42 can be used to cooperate with the limiting hole 36 to limit the transmission disc 35 and the turntable 32. The limiting plate 33 cooperates with the limiting groove 21 to limit and fix the entire middle support plate 3. The end of the U-shaped rod 42 away from the mounting base 4 is located above the limiting hole 36 on the transmission disc 35 in the direction closest to the mounting base 4. The end of the U-shaped rod 42 near the mounting base 4 is fixedly connected to the bottom wall of the storage groove 41 by a fixing spring 43.

[0025] Furthermore, during the grinding process, as the middle support plate 3 moves along the bottom support plate 2, the U-shaped rod 42 is first lifted by hand. At this time, one end of the U-shaped rod 42 is pulled out from the limiting hole 36, releasing the limiting work on the transmission plate 35. Simultaneously, the other end of the U-shaped rod 42 will stretch the fixing spring 43, allowing the middle support plate 3 to move smoothly along the bottom support plate 2, thereby changing the lateral position of the grinding wheel 92. Through the cooperation of the limiting groove 21 and the limiting plate 33, the turntable 32 can be rotated. Each limiting plate 33, after being inserted into the corresponding limiting groove 21, can cause the middle support plate 3 to stop. Due to the spacing between the limiting plates 33 and the grinding wheel 92... Since the width is the same, when the middle support plate 3 stops, it means that the grinding wheel 92 has moved exactly the same distance as its width. Then, the U-shaped rod 42 is released, and the fixing spring 43 begins to rebound, driving the U-shaped rod 42 to descend, so that the other end of the U-shaped rod 42 is inserted into the limiting hole 36 of the transmission plate 35. At this time, the transmission plate 35 can be limited by the cooperation between the U-shaped rod 42 and the limiting hole 36, and the turntable 32 can be limited and fixed. At this time, the middle support plate 3 can be limited. Only the small support plate 5 can be moved at this time. The small support plate 5 moves along the middle support plate 3, so as to ensure that the grinding wheel 92 can only move with the small support plate 5 to perform longitudinal grinding work.

[0026] Combined with appendix Figure 3 As shown, a lead screw 6 is rotatably connected to one side of the middle support plate 3 via the frame. A handle 61 is fixedly connected to the end of the lead screw 6 away from the bed 1. A transmission frame 51 is fixedly connected to the side of the small support plate 5 near the lead screw 6. The transmission frame 51 is sleeved on the lead screw 6 and threadedly connected to it.

[0027] Furthermore, by driving the lead screw 6 to rotate through the handle 61, the small support plate 5 is limited by the middle support plate 3 during the rotation of the lead screw 6. At this time, the rotational force between the lead screw 6 and the transmission frame 51 is converted into a linear force, which can drive the small support plate 5 to move along the middle support plate 3.

[0028] Working principle: First, install the machine bed 1 in the designated position, and then turn on the power to start use. The lower working surface 11 and the upper working surface 12 cooperate with the corresponding mold to perform stamping work on the workpiece. After stamping, the workpiece is removed from the lower working surface 11, and then the bottom plate 2 is placed on the lower working surface 11. Then, the bottom plate 2 is fixed with the limit bolt 22. During the operation, the driver 91 can be turned on to drive the grinding wheel 92 to rotate. When the grinding wheel 92 rotates, it can grind the bottom of the workpiece located on the upper working surface 12. The lateral position of the grinding wheel 92 can be changed by moving the middle support plate 3 along the bottom support plate 2. During this movement, the U-shaped rod 42 is first lifted by hand. One end of the U-shaped rod 42 is then pulled out of the limiting hole 36, releasing the limiting action on the transmission disc 35. Simultaneously, the other end of the U-shaped rod 42 stretches the fixing spring 43, allowing the middle support plate 3 to move smoothly along the bottom support plate 2, thus changing the lateral position of the grinding wheel 92. The rotation of the turntable 32 is achieved through the cooperation of the limiting groove 21 and the limiting plate 33. Each limiting plate 33, when inserted into its corresponding limiting groove 21, causes the middle support plate 3 to pause. Since the spacing between the limiting plates 33 is the same as the width of the grinding wheel 92, when the middle support plate 3 pauses... This means that the grinding wheel 92 has moved exactly the same distance as its width. Then, the U-shaped rod 42 is released, and the fixing spring 43 begins to rebound, causing the U-shaped rod 42 to descend. This allows the other end of the U-shaped rod 42 to be inserted into the limiting hole 36 of the transmission disk 35. At this time, the transmission disk 35 is limited by the cooperation between the U-shaped rod 42 and the limiting hole 36, and the turntable 32 is limited and fixed. At this time, the middle support plate 3 is limited, and only the small support plate 5 can be moved. The small support plate 5 moves along the middle support plate 3, thus ensuring that the grinding wheel 92 can only follow the small support plate 5 to perform longitudinal grinding work. By repeating the operation, it is possible to avoid the grinding wheel 92 moving a distance exceeding its own width when grinding the workpiece, which would result in some missing parts of the workpiece. During the grinding process, the shaft 79 can drive the helical gear B77 to rotate. At this time, the helical gear B77 drives the helical gear A76 and the sleeve 75 to rotate. During the rotation of the sleeve 75, the rotating seat 73 and the top plate 74 can be driven to rotate. At this time, the top plate 74 can drive the fixed frame 9, the driver 91 and the grinding wheel 92 to turn, so that the grinding wheel 92 can change the angle to continue grinding the bottom of the workpiece on the upper working surface 12. During the rotation of the sleeve 75, it drives the guide frame 8 to rotate as well. At this time, the guide rod 83 slides along the guide opening 71. Through the cooperation of the guide opening 71 and the guide rod 83, the maximum rotation angle of the sleeve 75 and the rotating seat 73 is limited to ninety degrees. When the guide rod 83 moves to the end of the guide opening 71, the magnet 72 embedded in the guide opening 71 magnetically attracts the guide rod 83, thereby limiting and fixing the guide rod 83, thus limiting and fixing the sleeve 75 and the rotating seat 73. When it is necessary to rotate the direction of the driver 91 and the grinding wheel 92 again, the operator can press the pressure plate 88. The pressure plate 88 drives the connecting rod B87 to descend. At this time, the connecting rod B87 drives the transmission rod 84 to descend synchronously. During this process, the transmission rod 84 drives the limit spring B86 to rise, and drives the limit spring B86 to rise. During the compression and contraction of A85, the transmission rod 84 drives the connecting rod A82 to descend along the movable cavity 81. At this time, the connecting rod A82 drives the guide rod 83 to descend as well, causing the guide rod 83 to move out of the guide opening 71 and retract into the movable cavity 81 of the guide frame 8. At this time, the magnetic attraction effect of the magnet 72 on the guide rod 83 disappears, and the rotating seat 73 can continue to be controlled to rotate. During the rotation of the rotating seat 73, the pressure plate 88 is released. At this time, the limit springs A85 and B86 start to rebound simultaneously, driving the transmission rod 84 to rise to the initial position. At this time, the transmission rod 84 can drive the connecting rod A82, the guide rod 83, the connecting rod B87, and the pressure plate 88 to rise to their initial positions. At this time, the guide rod 83 will re-insert into the guide opening 71 and cooperate with the guide opening 71 to restrict the rotation angle of the rotating seat 73 again.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grinding device for a punch press worktable, comprising a bed (1), wherein a lower working surface (11) and an upper working surface (12) are respectively provided on the bed (1), characterized in that: A bottom support plate (2) is placed on the lower working surface (11). A middle support plate (3) is slidably connected to the top of the bottom support plate (2). A small support plate (5) is slidably connected to the middle support plate (3). A fixed seat (7) is fixedly connected to the top of the small support plate (5). A rotating seat (73) is rotatably connected to the top of the fixed seat (7). A sleeve (75) is rotatably connected to the inner top wall of the fixed seat (7). The top end of the sleeve (75) is fixedly connected to the bottom of the rotating seat (73). (75) has a helical gear A (76) fixedly connected to its bottom end. The inner wall of one side of the fixed seat (7) is rotatably connected to a helical gear B (77) that meshes with the helical gear A (76). The side of the fixed seat (7) near the helical gear B (77) is rotatably connected to a shaft (79), and a knob is fixedly connected to the end of the shaft (79) away from the fixed seat (7). The shaft (79) is fixedly connected to the helical gear B (77). The top of the rotating seat (73) is fixedly connected to a top plate (74). A fixing frame (9) is fixedly connected to the top of the top plate (74), and a driver (91) is fixedly connected to one side of the top of the fixing frame (9). A grinding wheel (92) is fixedly connected to the output end of the driver (91). The top side of the fixed base (7) is provided with a guide opening (71) with a 90° arc structure, and the inner walls at both ends of the guide opening (71) are fitted with magnet pieces (72); a connecting hole (710) is provided between the rotating base (73), the top plate (74) and the sleeve (75), and a mounting cavity (741) communicating with the connecting hole (710) is provided on one side of the top plate (74). A support frame (78) is fixedly connected to the top of the small support plate (5) near the shaft (79), and the shaft (79) is located in the support frame (78) and rotatably connected to it; a guide frame (8) is fixedly connected to the side of the sleeve (75) near the guide opening (71), and a movable cavity (81) is provided in the guide frame (8). A connecting rod A (82) is vertically slidably connected inside the active cavity (81). A guide rod (83) is fixedly connected to the top end of the connecting rod A (82) near the guide port (71). The top end of the guide rod (83) passes through the guide frame (8) and is slidably connected to the inner wall of the guide port (71). A transmission rod (84) is slidably connected inside the connecting hole (710). A limit spring A (85) is fixedly connected between the bottom end of the transmission rod (84) and the inner bottom wall of the sleeve (75). A connecting rod B (87) is fixedly connected to the top end of the transmission rod (84) near the mounting cavity (741). The connecting rod B (87) is located inside the mounting cavity (741) and is slidably connected to the inner wall of the mounting cavity (741).

2. The grinding device for a punch press worktable according to claim 1, characterized in that: The bottom support plate (2) has several evenly distributed limiting grooves (21) on the side away from the bed body (1), and both ends of the bottom support plate (2) are threaded with limiting bolts (22).

3. The grinding device for a punch press worktable according to claim 2, characterized in that: The middle support plate (3) is fixedly connected to the side away from the bed body (1) with an installation plate (31). The bottom of the installation plate (31) is rotatably connected to a turntable (32), and the height of the turntable (32) is flush with the height of the limiting groove (21). Several limiting plates (33) are fixedly connected to the turntable (32) in a ring-shaped even distribution. The top of the installation plate (31) is fixedly connected to a transmission disc (35). Several limiting holes (36) are provided on the top of the transmission disc (35) in a ring-shaped even distribution. The included angle between the limiting plates (33) is the same as the included angle between the limiting holes (36).

4. The grinding device for a punch press worktable according to claim 3, characterized in that: The top of the mounting plate (31) is fixedly connected to a mounting base (4), and the top of the mounting base (4) is provided with a storage groove (41). A U-shaped rod (42) is slidably connected in the storage groove (41). The end of the U-shaped rod (42) away from the mounting base (4) is located above the limiting hole (36) on the transmission disc (35) in the direction closest to the mounting base (4). A fixing spring (43) is fixedly connected between the end of the U-shaped rod (42) close to the mounting base (4) and the bottom wall of the storage groove (41).

5. A grinding device for a punch press worktable according to claim 1, characterized in that: One side of the middle support plate (3) is rotatably connected to a screw rod (6) via the frame, and a handle (61) is fixedly connected to the end of the screw rod (6) away from the bed (1).

6. A grinding device for a punch press worktable according to claim 5, characterized in that: The small tray (5) is fixedly connected to a transmission frame (51) on the side near the lead screw (6). The transmission frame (51) is sleeved on the lead screw (6) and threadedly connected to it.

7. A grinding device for a punch press worktable according to claim 1, characterized in that: A limit spring B (86) is fixedly connected between the top end of the transmission rod (84) and the top wall of the mounting cavity (741), and a pressure plate (88) is fixedly connected to the end of the connecting rod B (87) away from the transmission rod (84).

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