A band saw blade rough grinding device

Abstract

The present invention relates to the technical field of band saw blade processing, and in particular to a rough grinding device for band saw blades, which includes a workbench and a double-axis moving machine symmetrically installed on the workbench. A grinding machine is installed on the moving part of the double-axis moving machine for grinding the weld of the band saw blade. An electric fixture is installed on the workbench between the grinding machines. In the present invention, first, the grinding machines on the upper and lower sides are started to move to grind both sides of the weld of the band saw blade. After both sides of the weld are ground, the electric fixture is started to loosen the band saw blade, and the band saw blade is pulled to rotate 180 degrees so that the welding position of the band saw blade contacts the abrasive belt. Subsequently, the electric screw is started to move the triangular plate downward to limit the front side of the grinding position on the back of the band saw blade, and then the drive motor is started to rotate the abrasive belt to grind the back of the band saw blade. In this way, it can prevent the band saw blade from moving forward and affecting the grinding effect, and can prevent the band saw blade from being damaged, thereby improving the grinding effect and safety.

Description

Technical Field

[0001] The present invention relates to the technical field of band saw blade processing, and particularly to a rough grinding device for band saw blades. Background Art

[0002] In the field of mechanical processing, the endless band saw blade, as an efficient and precise cutting tool, is widely used in cutting operations of materials such as metal bars. The endless band saw blade is formed by butt-welding the two ends of the saw blade. However, after the endless band saw blade is welded, the welded surface often has uneven welds. These welds not only affect the appearance quality of the endless band saw blade, but more importantly, they will have an adverse impact on the cutting operation, so it is necessary to grind the weld position.

[0003] Chinese Patent with the publication number CN211029478U discloses a rough grinder for band saw blades, which relates to the technical field of saw blade processing equipment and includes a weld grinding mechanism and a saw back grinding mechanism arranged on a frame. The weld grinding mechanism includes a band saw fixing table fixedly installed on the frame. Above the band saw fixing table, there is a grinding wheel for grinding the weld. On both sides of the grinding wheel above the band saw fixing table, there is a pressing plate respectively. The pressing plate and the band saw fixing table cooperate to press the band saw; the saw back grinding mechanism includes a grinding belt and a mounting plate. The mounting plate is arranged above the saw back grinding mechanism through a support column. On the mounting plate, there is a runner transmission device matching with the grinding belt, and the grinding belt is installed on the runner transmission device. Although the above patent can grind the weld and the back of the band saw blade, when grinding the back of the band saw blade, due to the lack of a limiting device on the front side of the grinding position on the back, when subjected to the pressure of grinding, the front side of the grinding position on the back of the band saw blade is prone to forward displacement. This displacement phenomenon not only affects the grinding effect, but may also cause damage to the band saw blade during grinding, reducing its service life.

[0004] The present invention aims to solve the problems existing in the above patent. For this purpose, a rough grinding device for band saw blades is proposed, which can limit the front side of the grinding position on the back of the band saw blade during grinding, prevent the occurrence of displacement, and improve the grinding effect and safety. Summary of the Invention

[0005] In order to overcome the drawback that due to the lack of a limiting device on the front side of the grinding position on the back, when subjected to the pressure of grinding, the front side of the grinding position on the back of the band saw blade is prone to forward displacement. This displacement phenomenon not only affects the grinding effect, but may also cause damage to the band saw blade during grinding, reducing its service life, the present invention provides a rough grinding device for band saw blades, which can limit the front side of the grinding position on the back of the band saw blade during grinding, prevent the occurrence of displacement, and improve the grinding effect and safety.

[0006] The present invention is achieved through the following technical solutions:

[0007] A rough grinding device for a band saw blade comprises a workbench and a double-axis moving machine symmetrically mounted on the workbench, a grinder is mounted on the moving part of the double-axis moving machine for grinding the weld of the band saw blade, an electric clamp is mounted between the grinders on the workbench for clamping and fixing the band saw blade, a lift is mounted on the top of the workbench, a movable plate is fixedly connected to the moving part of the lift, limiting rollers are symmetrically mounted on the movable plate, electric pressure rollers corresponding to the limiting rollers are symmetrically mounted on the movable plate, and a grinding assembly is also included on the movable plate for grinding the back of the band saw blade, and a lifting device is fixedly mounted on the movable plate to fix the lifting device to the moving part of the lift. There is an n-type frame, a guide rod is fixed on the inner side of the n-type frame, a vertical plate is slidably mounted on the guide rod, triangular plates are symmetrically fixed on the vertical plates, the inclined surface of the triangular plates is at the rear side, a supporting plate located between the limiting rollers is fixed on the movable plate to support and limit the band saw blade, an electric screw is vertically rotatably connected to the inner side of the n-type frame and is threadedly connected to the vertical plate, the electric screw is used to drive the vertical plate to move downward, the vertical plate drives the triangular plate to move downward and contact the front side of the grinding position on the back of the band saw blade, so that the triangular plate limits the front side of the grinding position on the back of the band saw blade, and then the grinding assembly grinds the back of the band saw blade after limiting.

[0008] To further explain, the grinding assembly includes a fixed frame fixed to the movable plate, the fixed frame is rotatably connected with guide rollers at even intervals, a sanding belt is wound between the guide rollers for grinding the back of the band saw blade, a driving motor is installed on the fixed frame, the output shaft of the driving motor is connected to one of the guide rollers through a synchronous belt assembly, and a tensioning assembly is provided on the movable plate for tightening the sanding belt.

[0009] Further explanation, the tensioning assembly includes a guide rod fixed to the movable plate, the guide rod is located below the fixed frame, a mounting plate is slidably mounted on the guide rod, and tensioning rollers in contact with the abrasive belt are rotatably connected to the mounting plate at even intervals for tightening the abrasive belt. An adjusting screw located on the right side of the guide rod is rotatably connected to the movable plate, and the adjusting screw is threadedly connected to the mounting plate.

[0010] As a further explanation, the tensioning assembly also includes a wheel fixedly mounted on the end of the adjusting screw rod.

[0011] Further description, the rough grinding device for the band saw blade further includes a conveying component. The conveying component includes support columns symmetrically fixed on the workbench. A guiding frame is fixedly connected between the ends of the support columns. The guiding frame is located between the double-axis moving machine and the elevator. Inside the guiding frame, there are symmetrically sliding-connected limiting plates for limiting the rotation of the band saw blade. A bidirectional screw rod is rotatably connected between the two sides of the guiding frame. The threads on the left and right sides of the bidirectional screw rod are opposite. The bidirectional screw rod is threadedly connected to the limiting plates. A servo motor is installed on the guiding frame. The end of the output shaft of the servo motor is fixedly connected to the end of the bidirectional screw rod. Symmetrically fixed on the top of the workbench are mounting columns. At the ends of the mounting columns, there are electric conveying rollers corresponding to the limiting plates for driving the band saw blade to rotate.

[0012] Further description, the rough grinding device for the band saw blade further includes a deviation rectifying component. The deviation rectifying component includes a bidirectional screw rod rotatably connected to the bottom of the workbench. The threads on the left and right sides of the bidirectional screw rod are opposite. Symmetrically sliding sleeves are sleeved on the bidirectional screw rod with deviation rectifying plates. Inside the deviation rectifying plates, there are convex balls fixed. The convex balls are located in the thread grooves of the bidirectional screw rod. On the upper part of the front side and the lower part of the rear side of the deviation rectifying plates, there are rotatably connected contact rollers for guiding the movement of the deviation rectifying plates. A reduction motor is installed on the workbench. The end of the output shaft of the reduction motor is fixedly connected to the end of the bidirectional screw rod. A U-shaped rod is fixed on the workbench. The U-shaped rod contacts the contact rollers.

[0013] Further description, the rough grinding device for the band saw blade further includes a rotating roller rotatably connected to the limiting plate for reducing the friction between the limiting plate and the band saw blade.

[0014] Further description, the rough grinding device for the band saw blade further includes a fixed frame fixed on the electric fixture. The fixed frame corresponds to the grinding machine for collecting the dust generated during grinding. A dust suction pipe is connected to the fixed frame. A dust collection frame is fixed on the support plate and is located below the abrasive belt. The bottom of the inner part of the dust collection frame is of a structure inclined from right to left. A hose is connected to the bottom of the dust collection frame. The tail end of the hose is connected to the dust suction pipe.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. First, start the upper and lower grinding machines to move and grind the two sides of the weld of the band saw blade. After the two sides of the weld are ground, start the electric fixture to loosen the band saw blade, pull the band saw blade to rotate 180 degrees, so that the welding position of the band saw blade contacts the abrasive belt. Then start the electric screw rod to make the triangular plate move downward to limit the front side of the grinding position on the back of the band saw blade. Next, start the drive motor to make the abrasive belt rotate to grind the back of the band saw blade. In this way, it can prevent the band saw blade from moving forward and affecting the grinding effect, and can prevent the band saw blade from being damaged, thus improving the grinding effect and safety.

[0017] 2. Under the action of the limit plate and the electric conveying roller, the limit plate can press the band saw blade on the electric conveying roller. Then, start the reverse rotation of the electric conveying roller to drive the positive rotation of the band saw blade by 180 degrees, so that the welding position of the band saw blade corresponds to the sand belt. In this way, there is no need for the operator to pull the band saw blade by hand to rotate 180 degrees for back grinding, which is convenient and fast, thus further improving the grinding efficiency.

[0018] 3. Under the action of the deviation correction plate, whenever the band saw blade is placed, the deviation correction plate can correct and position the band saw blade, so that the band saw blade is in a straightened state, which can prevent the position of the band saw blade from being skewed and affecting grinding, thus ensuring the normal grinding of the band saw blade. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the limit roller and the electric pressing roller of the present invention.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the triangular plate and the support plate of the present invention.

[0022] Figure 4 It is a three-dimensional structural schematic diagram of the vertical plate and the driving screw of the present invention.

[0023] Figure 5 It is a three-dimensional structural schematic diagram of the grinding assembly of the present invention.

[0024] Figure 6 It is a three-dimensional structural schematic diagram of the conveying assembly of the present invention.

[0025] Figure 7 It is a three-dimensional structural schematic diagram of the deviation correction assembly of the present invention.

[0026] Figure 8 It is a three-dimensional structural schematic diagram of the contact roller and the convex ball of the present invention.

[0027] Figure 9 It is a three-dimensional structural schematic diagram of the rotating roller of the present invention.

[0028] Figure 10 It is a three-dimensional structural schematic diagram of the dust suction assembly of the present invention.

[0029] Figure 11 It is a sectional structural schematic diagram of the dust collection frame of the present invention.

[0030] Names of the reference numerals in the figure: 1 - workbench, 2 - biaxial moving machine, 3 - grinding machine, 4 - electric fixture, 5 - elevator, 6 - movable plate, 7 - limiting roller, 8 - electric pressure roller, 9 - n-shaped frame, 91 - guide rod, 92 - vertical plate, 93 - triangular plate, 94 - electric screw rod, 96 - support plate, 10 - fixed frame, 101 - guide roller, 102 - abrasive belt, 103 - drive motor, 104 - guide rod, 105 - mounting plate, 106 - tensioning roller, 107 - adjusting screw rod, 108 - disc, 11 - support column, 111 - guide frame, 112 - limiting plate, 113 - bidirectional screw rod, 114 - servo motor, 115 - mounting column, 116 - electric conveying roller, 12 - bidirectional screw, 121 - reduction motor, 122 - deviation rectifying plate, 123 - u-shaped rod, 124 - contact roller, 125 - convex ball, 13 - rotating roller, 14 - dust collecting box, 141 - hose, 142 - fixed frame, 143 - dust suction pipe. Detailed implementation mode

[0031] Embodiment: A rough grinding device for a band saw blade, please refer to Figures 1 - 5As shown in the figure, it includes a workbench 1 and a double-axis moving machine 2 symmetrically installed above and below the left front side of the workbench 1. A grinding machine 3 is installed on the moving part of the double-axis moving machine 2. When the grinding machine 3 is started, the grinding machine 3 can grind the weld of the band saw blade. An opening is provided on the front side of the workbench 1 for the lower grinding machine 3 to pass through. An electric fixture 4 is installed on the front side of the top of the workbench 1. The electric fixture 4 is located between the upper and lower grinding machines 3. The electric fixture 4 can clamp and fix the band saw blade. A lifter 5 is installed on the rear side of the top of the workbench 1. A movable plate 6 is fixedly connected to the moving part of the lifter 5. Limiting rollers 7 are symmetrically installed on the left and right sides of the front side of the movable plate 6. Electric pressing rollers 8 are symmetrically installed on the left and right sides of the front side of the movable plate 6. The left and right electric pressing rollers 8 correspond to the left and right limiting rollers 7 respectively. It also includes an n-shaped frame 9, a guide rod 91, a vertical plate 92, a triangular plate 93, an electric screw rod 94, a support plate 96 and a grinding assembly. A grinding assembly is arranged on the movable plate 6. When the grinding assembly operates, the grinding assembly can grind the back of the band saw blade. An n-shaped frame 9 is fixedly connected to the top of the movable plate 6. A guide rod 91 is vertically and fixedly connected to the left side of the inner front side of the n-shaped frame 9. A vertical plate 92 is slidably sleeved on the guide rod 91. Triangular plates 93 are symmetrically fixedly connected to the left and right sides of the rear side of the vertical plate 92. The inclined surfaces of the triangular plates 93 are at the rear side. A support plate 96 is fixedly connected to the upper part of the front side of the movable plate 6. The support plate 96 is located between the left and right limiting rollers 7. The support plate 96 can support and limit the band saw blade. An electric screw rod 94 is vertically rotatably connected to the right side of the inner front side of the n-shaped frame 9. The electric screw rod 94 is threadedly connected to the front side of the vertical plate 92. The electric screw rod 94 is used to drive the vertical plate 92 to move downward. The vertical plate 92 drives the triangular plate 93 to move downward to contact the front side of the grinding position on the back of the band saw blade, so that the triangular plate 93 limits the front side of the grinding position on the back of the band saw blade. Subsequently, the grinding assembly grinds the back of the band saw blade after being limited.

[0032] Please refer to Figure 5As shown, the grinding assembly includes a fixed frame 10, a guide roller 101, a sanding belt 102, a driving motor 103 and a tensioning assembly. The fixed frame 10 is fixedly connected to the middle of the front side of the movable plate 6. Three guide rollers 101 are evenly spaced and rotatably connected to the front side of the fixed frame 10. The three guide rollers 101 are distributed in a triangle. The sanding belt 102 is wound between the three guide rollers 101. When the sanding belt 102 rotates, the sanding belt 102 can grind the back of the band saw blade. A driving motor 103 is installed on the inner rear side of the fixed frame 10. The output shaft of the driving motor 103 is connected to the upper part of the rear guide roller 101 through a synchronous belt assembly. A tensioning assembly is arranged on the movable plate 6. When the tensioning assembly is in operation, the tensioning assembly can tighten the sanding belt 102; the tensioning assembly includes It includes a guide rod 104, a mounting plate 105, a tensioning roller 106, an adjusting screw 107 and a wheel 108. The lower part of the front side of the movable plate 6 is fixedly connected to the guide rod 104, and the guide rod 104 is located below the fixed frame 10. The mounting plate 105 is slidably mounted on the guide rod 104. Three tensioning rollers 106 are rotatably connected to the upper part of the front side of the mounting plate 105 at even intervals. The tensioning roller 106 is in contact with the abrasive belt 102. When the tensioning roller 106 moves forward, the tensioning roller 106 can tighten the abrasive belt 102. The lower part of the front side of the movable plate 6 is rotatably connected to the adjusting screw 107, which is located on the right side of the guide rod 104. The adjusting screw 107 is threadedly connected to the lower part of the mounting plate 105, and the front end of the adjusting screw 107 is fixedly mounted with a wheel 108.

[0033] First, start the elevator 5 to drive the movable plate 6 to move up and down. The movable plate 6 drives the limit roller 7 to move up and down. When the limit roller 7 moves up and down to a suitable position for placing the band saw blade, close the lifting frame. Then, move the welded band saw blade between the electric fixture 4 and the two limit rollers 7, and make the welding position of the band saw blade under the grinding machine 3. Start the electric fixture 4 to clamp and fix the band saw blade. Then, start the double-shaft moving machines 2 on the upper and lower sides to drive the grinding machines 3 on the upper and lower sides to move forward first. When the grinding machines 3 on the upper and lower sides move forward to both sides of the welding position of the band saw blade, the double-shaft moving machines 2 on the upper and lower sides stop driving the grinding machines 3 on the upper and lower sides to move forward. Subsequently, the double-shaft moving machines 2 on the upper and lower sides drive the grinding machines 3 on the upper and lower sides to move towards each other. The grinding machines 3 on the upper and lower sides respectively contact both sides of the weld of the band saw blade. Close the double-shaft moving machines 2 on the upper and lower sides. Then, start the grinding machines 3 on the upper and lower sides to rotate, and start the double-shaft moving machines 2 to drive the grinding machines 3 to move back and forth continuously. The grinding machines 3 rotate and move back and forth to simultaneously grind both sides of the weld of the band saw blade, thus grinding the weld position flat and removing the burrs. When both sides of the weld of the band saw blade are ground flat, turn off the grinding machines 3. Start the double-shaft moving machines 2 to drive the grinding machines 3 on the upper and lower sides to move away from each other and reset. Subsequently, make the grinding machines 3 on the upper and lower sides move backward and reset. Then, pull the band saw blade to rotate forward by 180 degrees, so that the welding position of the band saw blade is above and corresponds to the abrasive belt 102, and the back of the band saw blade contacts the abrasive belt 102. Then, start the electric pressure rollers 8 on the left and right sides to operate and contact the band saw blade. The electric pressure rollers 8 press the band saw blade against the limit rollers 7. Turn off the electric pressure rollers 8. The band saw blade contacts the support plate 96 and is supported. Then, start the electric screw 94 to rotate forward to drive the vertical plate 92 to move downward. The vertical plate 92 moves downward to drive the triangular plate 93 to move downward. The downward movement of the triangular plate 93 makes the inclined surface contact the front side of the band saw blade. The triangular plate 93 pushes the band saw blade to move backward and contact the abrasive belt 102 tightly. Subsequently, the triangular plate 93 and the support plate 96 cooperate to limit the band saw blade, thus completing the limitation of the front side of the grinding position on the back of the band saw blade. Then, the drive motor 103 can be started. The drive motor 103 drives the rear guide roller 101 to rotate through the synchronous belt assembly. The rotation of the rear guide roller 101 drives the abrasive belt 102 to rotate through the two front guide rollers 101. The rotation of the abrasive belt 102 grinds the back of the band saw blade, thus completing the overall grinding of the band saw blade. Since the triangular plate 93 limits the front side of the grinding position on the back of the band saw blade, it can prevent the band saw blade from moving forward and affecting the grinding effect, and can also prevent the band saw blade from being damaged, thereby improving the grinding effect and safety. When the back of the band saw blade is ground, turn off the drive motor 103. The guide roller 101 stops driving the abrasive belt 102 to rotate. Start the electric screw 94 to rotate in reverse to drive the vertical plate 92 to move upward and reset. The vertical plate 92 drives the triangular plate 93 to move upward and reset. The triangular plate 93 resets and disengages from the front side of the band saw blade. The front side of the band saw blade stops being limited. Then, start the electric pressure rollers 8 to reset and loosen the band saw blade.The polished band saw blade can be removed from the electric fixture 4 and the limiting roller 7, and the band saw blade can be put in again according to the above operations, and then the welding position and the back of the band saw blade can be polished comprehensively. When the abrasive belt 102 becomes loose after long-term use, turn the turntable 108 to drive the adjusting screw rod 107 to rotate forward. The forward rotation of the adjusting screw rod 107 drives the mounting plate 105 to move forward. The forward movement of the mounting plate 105 drives the tensioning roller 106 to move forward. The forward movement of the tensioning roller 106 pushes the abrasive belt 102 forward, thus tightening the abrasive belt 102. Stop turning the turntable 108, the adjusting screw rod 107 stops driving the mounting plate 105 to move forward, and the tensioning roller 106 stops moving forward. When the abrasive belt 102 rotates to polish the back of the band saw blade, the tensioning roller 106 can guide the abrasive belt 102. In this way, the phenomenon that the abrasive belt 102 becomes loose and affects the polishing of the back of the band saw blade can be prevented, so as to ensure the normal use effect of the abrasive belt 102. When the abrasive belt 102 has reached the maximum limit of use and needs to be replaced, turn the turntable 108 to drive the adjusting screw rod 107 to rotate reversely to drive the mounting plate 105 to move backward and reset. The mounting plate 105 drives the tensioning roller 106 to move backward and reset, and then the used abrasive belt 102 can be removed, and a new abrasive belt 102 can be replaced between the three guiding rollers 101.,

[0034] Please refer to Figure 6 As shown in the figure, the rough grinding device for the band saw blade further includes a conveying component installed on the workbench 1. The conveying component includes support columns 11, a guiding frame 111, limiting plates 112, a bidirectional screw rod 113, a servo motor 114, mounting columns 115 and electric conveying rollers 116. Support columns 11 are symmetrically and fixedly connected to the left and right of the top of the workbench 1. A guiding frame 111 is fixedly connected between the tops of the support columns 11 on the left and right sides. The guiding frame 111 is located between the double-axis moving machine 2 and the elevator 5. Limiting plates 112 are symmetrically and slidably connected to the left and right sides inside the guiding frame 111. When the limiting plates 112 move and contact the inner side of the band saw blade, the limiting plates 112 can limit the rotation of the band saw blade. The positions where the left and right limiting plates 112 are away from each other are arc-shaped. A bidirectional screw rod 113 is rotatably penetrated between the left and right sides of the guiding frame 111. The threads on the left and right sides of the bidirectional screw rod 113 are opposite. The bidirectional screw rod 113 is threadedly connected to the rear sides of the left and right limiting plates 112. A servo motor 114 is installed on the outer right side of the guiding frame 111. The end of the output shaft of the servo motor 114 is fixedly connected to the right end of the bidirectional screw rod 113. Mounting columns 115 are symmetrically and fixedly connected to the front side of the top of the workbench 1. Electric conveying rollers 116 are installed at the tops of the left and right mounting columns 115. The left and right electric conveying rollers 116 correspond to the left and right limiting plates 112 respectively. When the electric conveying rollers 116 rotate, the electric conveying rollers 116 can drive the band saw blade to rotate so that the welding position of the band saw blade is above.,

[0035] Please refer to Figure 7 and Figure 8As shown, the rough grinding device for the band saw blade further includes a deviation rectifying component installed on the workbench 1. The deviation rectifying component includes a bidirectional screw 12, a reduction motor 121, a deviation rectifying plate 122, a U-shaped rod 123, a contact roller 124, and a convex ball 125. A bidirectional screw 12 is horizontally rotatably connected to the front side of the bottom of the workbench 1. The threads on the left and right sides of the bidirectional screw 12 are opposite. Deviation rectifying plates 122 are slidably sleeved on the left and right sides of the bidirectional screw 12 symmetrically. A convex ball 125 is fixedly connected to the inner side of the deviation rectifying plate 122. The convex ball 125 is located in the thread groove of the bidirectional screw 12. Contact rollers 124 are rotatably connected to the upper part of the front side and the lower part of the rear side of the left and right deviation rectifying plates 122. The contact rollers 124 can guide the movement of the deviation rectifying plates 122. A reduction motor 121 is installed on the right front side of the bottom of the workbench 1. The end of the output shaft of the reduction motor 121 is fixedly connected to the right end of the bidirectional screw 12. A U-shaped rod 123 is fixedly connected to the upper part of the workbench 1. The U-shaped rod 123 contacts the contact rollers 124 on the front side and the rear side.

[0036] When the band saw blade is placed between the electric fixture 4 and the two limiting rollers 7, the band saw blade passes through between the limiting plate 112 and the electric conveying roller 116. Then, start the servo motor 114 to drive the bidirectional lead screw 113 to rotate forward. The forward rotation of the bidirectional lead screw 113 drives the limiting plates 112 on the left and right sides to move away from each other. The limiting plates 112 on the left and right sides move away from each other and contact the inner side of the band saw blade. The limiting plate 112 pushes the band saw blade to move and contact the electric conveying roller 116. Turn off the servo motor 114, and the bidirectional lead screw 113 stops driving the limiting plates 112 on the left and right sides to move. Then, the two sides of the weld of the band saw blade can be ground. When the two sides of the weld of the band saw blade are ground, start the electric fixture 4 to release the band saw blade. Then, start the electric conveying rollers 116 on the left and right sides to rotate in reverse. The reverse rotation of the electric conveying rollers 116 on the left and right sides drives the band saw blade to rotate forward through the limiting plate 112. When the band saw blade rotates forward by 180 degrees, turn off the electric conveying roller 116, and the band saw blade stops rotating forward. At this time, the welding position of the band saw blade corresponds to the abrasive belt 102, and subsequent operations can be carried out to complete the grinding of the back of the band saw blade. When the back of the band saw blade is ground, start the servo motor 114 to drive the bidirectional lead screw 113 to rotate in reverse. The reverse rotation of the bidirectional lead screw 113 drives the limiting plates 112 on the left and right sides to move closer to each other and reset. The limiting plate 112 resets and disengages from the inner side of the band saw blade. Turn off the servo motor 114, and the ground band saw blade can be taken off. In this way, there is no need for the operator to pull the band saw blade by hand to rotate 180 degrees for back grinding, which is convenient and fast, thus further improving the grinding efficiency.

[0037] After the band saw blade is placed, first start the reduction motor 121 to rotate forward, driving the bidirectional screw 12 to rotate forward. The forward rotation of the bidirectional screw 12 first drives the convex ball 125 to rotate forward. The forward rotation of the convex ball 125 drives the deviation correction plate 122 to swing upward. The upward swing of the deviation correction plate 122 drives the contact roller 124 to swing upward. When the contact roller 124 swings upward and contacts the workbench 1, the contact roller 124 is limited by the workbench 1, and the contact roller 124 stops swinging upward. The contact roller 124 causes the deviation correction plate 122 to stop swinging upward. At this time, the deviation correction plate 122 contacts the front side of the band saw blade. Subsequently, the bidirectional screw 12 continues to rotate forward, driving the convex balls 125 on the left and right sides to move away from each other. The convex balls 125 drive the deviation correction plates 122 on the left and right sides to move away from each other. The movement of the deviation correction plates 122 corrects and positions the deviation correction plates 122, so that the band saw blade is in a straightened state. When the deviation correction plates 122 on the left and right sides move away from each other to the maximum stroke, turn off the reduction motor 121. The bidirectional screw 12 stops driving the convex ball 125 to move, and the deviation correction plates 122 on the left and right sides stop moving. Then, the electric fixture 4 can be started to clamp and fix the band saw blade after deviation correction. Then, start the reduction motor 121 to drive the bidirectional screw 12 to rotate in reverse. The reverse rotation of the bidirectional screw 12 drives the deviation correction plates 122 on the left and right sides to swing downward and reset through the convex balls 125. The deviation correction plates 122 drive the contact roller 124 to swing downward and reset. The contact roller 124 is reset and contacts the U-shaped rod 123 and is limited. The contact roller 124 stops swinging. The contact roller 124 causes the deviation correction plate 122 to stop swinging. The bidirectional screw 12 continues to rotate in reverse, driving the deviation correction plates 122 on the left and right sides to move closer to each other and reset through the convex balls 125, and turn off the reduction motor 121. In this way, it is possible to prevent the position of the band saw blade from being skewed and affecting grinding, thereby ensuring normal grinding of the band saw blade.

[0038] Please refer to Figure 9 As shown, the rough grinding device for the band saw blade further includes a rotating roller 13. Rotating rollers 13 are rotatably connected to the positions where the left and right limiting plates 112 are away from each other. The rotating roller 13 can reduce the friction force between the limiting plate 112 and the band saw blade.

[0039] Please refer to Figure 10 and Figure 11 As shown, the rough grinding device for the band saw blade further includes a dust collection frame 14, a hose 141, a fixed frame 142, and a dust suction pipe 143. A fixed frame 142 is fixedly connected to the rear side of the electric fixture 4. The fixed frame 142 corresponds to the grinding machine 3. The fixed frame 142 can collect the dust generated during grinding. A dust suction pipe 143 is connected to the right side of the fixed frame 142. A dust collection frame 14 is fixedly connected to the front side of the bottom of the support plate 96. The dust collection frame 14 is located below the abrasive belt 102. The inner bottom of the dust collection frame 14 is inclined from right to left. A hose 141 is connected to the left side of the bottom of the dust collection frame 14. The tail end of the hose 141 is connected to the dust suction pipe 143.

[0040] When the limit plates 112 on the left and right sides move toward each other, the limit plates 112 drive the rotating rollers 13 on the left and right sides to move away from each other, and the rotating rollers 13 on the left and right sides move to contact the inner side of the band saw blade. The limit plates 112 push the band saw blade onto the electric conveying roller 116 through the rotating roller 13. The limit plates 112 stop moving, and the limit plates 112 press the band saw blade onto the electric conveying roller 116. When the electric conveying roller 116 reverses and drives the band saw blade to rotate forward, the band saw blade drives the rotating roller 13 to rotate, and the rotating roller 13 reduces the friction between the limit plates 112 and the band saw blade. When the limit plates 112 on the left and right sides move toward each other and reset, the limit plates 112 drive the rotating rollers 13 on the left and right sides to move toward each other and reset, and the rotating rollers 13 reset and disengage from the inner side of the band saw blade. In this way, the limit plates 112 can guide the band saw blade more smoothly.

[0041] Initially, the dust suction pipe 143 is connected to an external dust suction device. When the grinder 3 grinds the weld of the band saw blade, the external dust suction device is started. The dust suction device draws the dust generated by grinding into the dust suction pipe 143 through the fixed frame 142. The dust in the dust suction pipe 143 is discharged into the dust suction device for collection. When the weld of the band saw blade is finished grinding, the grinder 3 is turned off, and the external dust suction device is turned off at the same time. Then, when the sanding belt 102 rotates to grind the back of the band saw blade, the external dust suction device is started again. The dust collection frame 14 draws the dust generated by grinding into the hose 141. The dust in the hose 141 is discharged into the external dust suction device through the dust suction pipe 143 for collection. When the back of the band saw blade is finished grinding, the external dust suction device is turned off. In this way, the dust generated by grinding can be prevented from flying around and affecting the working environment, thereby ensuring a good working environment.

Claims

1. A rough grinding device for a band saw blade, comprising a workbench (1) and a double-axis moving machine (2) symmetrically installed on the workbench (1). A grinding machine (3) is installed on the moving part of the double-axis moving machine (2). An electric fixture (4) located between the grinding machines (3) is installed on the workbench (1). A lift (5) is installed on the top of the workbench (1). A movable plate (6) is fixedly connected to the moving part of the lift (5). Limiting rollers (7) are symmetrically installed on the movable plate (6). Electric pressing rollers (8) corresponding to the limiting rollers (7) are symmetrically installed on the movable plate (6). It is characterized in that, The invention also comprises a grinding assembly arranged on the movable plate (6) for grinding the back of the band saw blade. The movable plate (6) is fixedly connected to an n-shaped frame (9), the inner side of the n-shaped frame (9) is fixedly connected to a guide rod (91), a vertical plate (92) is slidably mounted on the guide rod (91), a triangular plate (93) is symmetrically fixedly connected to the vertical plate (92), the inclined surface of the triangular plate (93) is located at the rear side, and a support plate (96) located between the limiting rollers (7) is fixedly connected to the movable plate (6) to grind the back of the band saw blade. The band saw blade is supported and limited, and the inner side of the n-shaped frame (9) is vertically rotatably connected to an electric screw (94) threadedly connected to the vertical plate (92), and the electric screw (94) is used to drive the vertical plate (92) to move downward, and the vertical plate (92) drives the triangular plate (93) to move downward to contact the front side of the grinding position of the back of the band saw blade, so that the triangular plate (93) limits the front side of the grinding position of the back of the band saw blade, and then the grinding assembly grinds the back of the band saw blade after the limit; The grinding assembly comprises a fixed frame (10) fixedly connected to the movable plate (6), the fixed frame (10) being rotatably connected with guide rollers (101) at even intervals, an abrasive belt (102) being wound between the guide rollers (101) for grinding the back of the band saw blade, a driving motor (103) being mounted on the fixed frame (10), an output shaft of the driving motor (103) being connected to one of the guide rollers (101) via a synchronous belt assembly, and a tensioning assembly being arranged on the movable plate (6) for tightening the abrasive belt (102); The band saw blade rough grinding device also includes a conveying assembly, which includes a support column (11) symmetrically fixed to the workbench (1), a guide frame (111) fixed between the ends of the support column (11), the guide frame (111) is located between the double-axis moving machine (2) and the elevator (5), the inner side of the guide frame (111) is symmetrically slidably connected to a limit plate (112) for limiting the rotation of the band saw blade, and a bidirectional screw rod (113) is rotatably connected between the two sides of the guide frame (111). The threads on the left and right sides of the screw rod (113) are opposite, the bidirectional screw rod (113) is threadedly connected to the limit plate (112), a servo motor (114) is installed on the guide frame (111), the output shaft end of the servo motor (114) is fixedly connected to the end of the bidirectional screw rod (113), the top of the workbench (1) is symmetrically fixed with a mounting column (115), and the end of the mounting column (115) is installed with an electric conveying roller (116) corresponding to the limit plate (112) for driving the band saw blade to rotate; The rough grinding device for the band saw blade further includes a deviation rectifying component. The deviation rectifying component includes a bidirectional screw rod (12) rotatably connected to the bottom of the workbench (1). The threads on the left and right sides of the bidirectional screw rod (12) are opposite. Deviation rectifying plates (122) are symmetrically and slidably sleeved on the bidirectional screw rod (12). A convex ball (125) is fixedly connected to the inner side of the deviation rectifying plate (122). The convex ball (125) is located in the thread groove of the bidirectional screw rod (12). Contact rollers (124) are rotatably connected to the upper part of the front side and the lower part of the rear side of the deviation rectifying plate (122) to guide the movement of the deviation rectifying plate (122). A reduction motor (121) is installed on the workbench (1). The end of the output shaft of the reduction motor (121) is fixedly connected to the end of the bidirectional screw rod (12). A U-shaped rod (123) is fixedly connected to the workbench (1). The U-shaped rod (123) contacts the contact roller (124).

2. The rough grinding device for a bandsaw blade according to claim 1, characterized in that, The tensioning component includes a guide rod (104) fixedly connected to the movable plate (6). The guide rod (104) is located below the fixed frame (10). A mounting plate (105) is slidably sleeved on the guide rod (104). Tensioning rollers (106) in contact with the abrasive belt (102) are rotatably connected to the mounting plate (105) at equal intervals for tensioning the abrasive belt (102). An adjusting screw rod (107) is rotatably connected to the movable plate (6) on the right side of the guide rod (104). The adjusting screw rod (107) is threadedly connected to the mounting plate (105).

3. The rough grinding device for a band saw blade according to claim 2, characterized in that, The tensioning component further includes a wheel disc (108) fixedly sleeved on the end of the adjusting screw rod (107).

4. The rough grinding device for a bandsaw blade according to claim 3, characterized in that, The rough grinding device for the band saw blade further includes a rotating roller (13) rotatably connected to the limiting plate (112) for reducing the friction between the limiting plate (112) and the band saw blade.

5. The rough grinding device for a band saw blade according to claim 4, characterized in that The rough grinding device for the band saw blade further includes a fixed frame (142) fixedly connected to the electric fixture (4). The fixed frame (142) corresponds to the grinding machine (3) for collecting the dust generated during grinding. A dust suction pipe (143) is connected to the fixed frame (142). A dust collection frame (14) is fixedly connected to the support plate (96) below the abrasive belt (102). The inner bottom of the dust collection frame (14) is of a structure inclined from right to left. A hose (141) is connected to the bottom of the dust collection frame (14). The tail end of the hose (141) is connected to the dust suction pipe (143).

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