Electric grinding machine

Abstract

The invention discloses an electric grinding machine, and relates to the technical field of grinding machines, the electric grinding machine comprises a base table, and abrasive belts are rotationally arranged on the two opposite sides of the base table correspondingly; the top wall of the base table is used for placing the metal box body, and the to-be-coarsely ground part of the metal box body is positioned outside the base table and is positioned above at least one abrasive belt; the locking mechanism is used for positioning the metal box body on the top wall of the base station; the distance adjusting mechanism comprises a jacking air cylinder and a distance adjusting assembly; the jacking air cylinder can enable the distance adjusting assembly to carry the abrasive belt to conduct deep grinding or light grinding on the to-be-roughly-ground part of the metal box body. And one dust cover can cover one abrasive belt and the part, to be coarsely ground, of the metal box body at the abrasive belt. Manual intervention can be reduced, the metal box body can be automatically positioned, the polishing degree of the abrasive belt to the welding seam can be adjusted, and the problem that metal chippings are sputtered all around can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of grinders, and in particular to an electric grinder. Background Art

[0002] During the welding process of metal boxes and boxes, a thick weld will be formed between adjacent metal plates. Operators need to use a grinder to roughly grind the weld, and then manually fine grind it to completely eliminate the weld. Therefore, rough grinding of welds is mostly done with electric grinders.

[0003] In the prior art, a type of metal box body will form two welds at both ends of the height direction after welding, which needs to be roughly ground by a grinder. The Chinese invention patent with publication number CN108188882A discloses a belt grinder, including a frame, a belt grinding mechanism arranged on one side of the frame in the width direction, which is composed of three driving rollers and a belt that is sleeved on the three driving rollers and tensioned, and a material placement plate arranged at one end of the length direction of the frame. The material placement plate is close to the belt of the belt grinding mechanism, and the top wall of the material placement plate is used for placing the box body to be polished. After the operator supports the box body with his hands and positions it, the belt of the belt grinding mechanism can contact the weld of the box body. The belt grinding mechanism is started, and the high-speed moving belt on the belt grinding mechanism is continuously rubbed against the weld on the box body to roughly grind the box body, thereby reducing the thickness of the weld on the box body.

[0004] However, there are several problems with rough grinding of the box body by this type of electric grinder: 1. The operator is required to support the box body on the material placement plate with his hands, which is manpower-consuming and inconvenient; 2. Manual support of the box body is unstable, and the box body may deviate during the rough grinding process, which may easily cause the non-grinding parts of the box body to be mistakenly grinded, resulting in product processing loss; 3. The sanding belt grinding mechanism can only move the sanding belt at high speed to achieve the effect of grinding the weld, but cannot adjust the degree of grinding of the sanding belt on the box body weld, which may result in insufficient rough grinding or excessive grinding; 4. The metal scraps generated during the rough grinding process are easy to splash everywhere, polluting the environment where the equipment is located, and are not easy to clean. Summary of the invention

[0005] Purpose of the invention: The present application provides an electric grinder, aiming to improve the above-mentioned technical problems.

[0006] Technical solution: The present application provides an electric grinder, comprising a base, wherein two opposite sides of the base are rotatably provided with abrasive belts for rough grinding a metal box body, the top wall of the base is used for placing the metal box body, and the part of the metal box body to be rough ground is located outside the base and above at least one of the abrasive belts so as to be rough ground by the abrasive belt; a locking mechanism is arranged on the base, and the locking mechanism is used to position the metal box body on the top wall of the base; and a distance adjustment mechanism is provided inside the base. A lifting cylinder and a distance-adjusting assembly arranged on the output end of the lifting cylinder; one end of the distance-adjusting assembly passes through the base and abuts against the nearby sanding belt, and the lifting cylinder can enable the distance-adjusting assembly to carry the sanding belt close to the part of the metal box body to be roughly ground for deep grinding, or away from the part of the metal box body to be roughly ground for light grinding through the telescopic output end; a dust cover is arranged on two opposite sides of the base, and one dust cover can cover one sanding belt and the part of the metal box body to be roughly ground at the sanding belt.

[0007] By adopting the above technical scheme, the base is used to place the metal box body to be polished, the weld can be located on both sides of the base, and the sanding belts located on both sides of the base can directly rough grind the weld, thereby reducing the inconvenience of operators manually supporting the metal box body and sending it to the sanding belt for polishing; the locking structure positions the metal box body on the base to achieve automatic positioning of the metal box body on the base, further reducing the inconvenience of human intervention and possible positioning instability; the lifting cylinder can drive the sanding belt to approach or away from the weld through the distance adjustment component, so that the sanding belt can deeply or lightly polish the weld, and the polishing degree of the sanding belt polishing weld can be adjusted; the dust cover can cover the sanding belt and the part to be polished of the metal box body, effectively reducing the problem of metal debris splashing everywhere, polluting the environment and being difficult to clean.

[0008] Furthermore, the locking mechanism includes a relatively arranged limit bracket, a rotary clamping cylinder 1, and a stop plate located between the limit bracket and the rotary clamping cylinder 1; the limit bracket includes a vertically arranged first top plate and a second top plate, the first top plate and the stop plate are both located on the top wall of the base and are coplanar so as to jointly abut the metal box body; the second top plate is located at one end of the first top plate away from the stop plate, and the second top plate is located outside the base; the metal box body simultaneously abuts against the stop plate, the first top plate and the second top plate, and the rotary clamping cylinder 1 can abut against the metal box body and press the metal box body against the side wall of the second top plate.

[0009] By adopting the above technical scheme, the first top plate and the abutment plate can abut the metal box body at the same time on the top wall of the base, and the second top plate can abut the metal box body outside the base; when the first top plate, the abutment plate and the second top plate abut the metal box body at the same time, the two side walls of the metal box body can be abutted at the same time to limit the position; the rotary clamping cylinder 1 can abut the metal box body, and then the rotary clamping cylinder 1 and the second top plate can simultaneously limit the metal box body in the length direction of the base, effectively ensuring the positioning stability of the metal box body on the top wall of the base, and reducing the problems of mis-grinding and processing loss caused by possible unstable positioning when traditional operators manually position the metal box body.

[0010] Furthermore, the locking mechanism also includes multiple groups of rotary clamping cylinders 2; at least two groups of the rotary clamping cylinders 2 are arranged corresponding to the first top plate and the abutment plate, and the rotary clamping cylinders 2 can abut the metal box body and make the metal box body abut against the side walls of the first top plate and the abutment plate.

[0011] By adopting the above technical solution, when multiple groups of rotary clamping cylinders 2 abut against the metal box body at the same time, two groups of rotary clamping cylinders 2 abut against the first top plate and the abutment plate respectively, thereby realizing the positioning of the metal box body in the width direction of the base, effectively ensuring the positioning stability of the metal box body on the base.

[0012] Furthermore, the distance adjustment component includes a top connecting plate arranged on the output end of the lifting cylinder and a sand stop plate arranged on the top connecting plate; the base is penetrated by a distance adjustment channel for allowing one end of the top connecting plate connected to the sand stop plate to pass through, and the sand stop plate is away from the side wall of the top connecting plate and abuts against the sand belt.

[0013] By adopting the above technical solution, after the jacking cylinder retracts the output end, the top connecting plate can carry the sanding plate and the sanding belt close to or away from the weld, so that the contact tightness between the sanding belt and the weld can be adjusted, and the sanding belt can perform deep or light grinding on the weld, thereby realizing that the grinding degree when the sanding belt grinds the weld can be adjusted.

[0014] Furthermore, the distance adjustment assembly also includes a guide rod arranged on the sand stop plate, and a guide groove capable of allowing the guide rod to be inserted and adapted to slide is arranged on the side wall of the base.

[0015] By adopting the above technical scheme, in the process of the jacking cylinder controlling the top connecting plate to carry the sanding plate and the sanding belt to move in the vertical direction, the guide rod can slide adaptively along the height direction of the guide groove, thereby ensuring that the sanding plate always carries the sanding belt to move in the vertical direction, and through the closed openings at both ends of the guide groove in the height direction, it can limit the sanding plate carrying the sanding belt from getting too close to the weld, thereby causing excessive grinding of the non-grinding area of ​​the metal box body; or it can reduce the phenomenon of the sanding belt detaching from the weld, ensuring that the sanding belt can grind the weld when rotating.

[0016] Furthermore, the distance adjustment assembly also includes a correction unit, which includes a correction rod arranged on the end of the top connecting plate away from the sand stop plate and a fixed frame arranged in the base; the end of the correction rod away from the top connecting plate passes through the fixed frame and can move back and forth relative to the fixed frame following the extension and retraction of the output end of the lifting cylinder.

[0017] By adopting the above technical scheme, in the process of lifting the output end of the cylinder, as the top connecting plate can carry the sanding plate and the sanding belt to move in the vertical direction, the correcting rod can move in the vertical direction relative to the fixed frame, and then through the lateral support of the correcting rod by the fixed frame, it is effectively ensured that the sanding plate can always carry the sanding belt in the vertical direction to move in the vertical direction.

[0018] Furthermore, the electric grinder also includes a tensioning mechanism, which includes a mounting frame arranged on opposite sides of the base, a connecting plate obliquely arranged on one side of the mounting frame, and a tensioning guide wheel rotatably arranged on the connecting plate; the tensioning guide wheel and the adjacent sanding plate are both located in the same sanding belt, the tensioning guide wheel is against the sanding belt, and is symmetrical with the sanding plate in the sanding belt.

[0019] By adopting the above technical solution, after the tensioning guide wheel is installed on the mounting frame through the connecting plate, the tensioning guide wheel can abut against the sanding belt and can be symmetrical with the sanding plate inside the sanding belt, so that the sanding belt remains in a tensioned state, thereby ensuring that the sanding belt can always effectively grind the weld after it contacts the weld, reducing the phenomenon that the sanding belt cannot effectively grind the weld even though it contacts the weld due to loose sanding belt.

[0020] Furthermore, a connecting pipe is provided on the dust cover, and a negative pressure suction machine is provided at one end of the connecting pipe away from the dust cover, and the negative pressure suction machine sucks metal waste in the dust cover through the connecting pipe; a metal waste collection mechanism can also be detachably installed on the connecting pipe.

[0021] By adopting the above technical solution, the negative pressure suction machine sucks the metal scraps in the dust cover through the connecting pipe to reduce the excessive accumulation of metal scraps in the dust cover; the metal scrap collection mechanism can block the metal scraps carried in the air flow in the connecting pipe to reduce the metal scraps from entering the negative pressure suction machine and damaging the negative pressure suction machine.

[0022] Furthermore, the metal waste collection mechanism includes a breathable mesh plate, a wet wipe cloth arranged on the side wall of the breathable mesh plate, and a sealing block arranged at one end of the breathable mesh plate; the sealing block can be deformed, and the outer circumferential size of the sealing block is larger than the outer circumferential size of the breathable mesh plate; the connecting pipe is penetrated by a plug-in channel for the sealing block to be inserted and interference fit, and the breathable mesh plate carrying the wet wipe cloth can allow gas to pass through in the connecting pipe and block metal waste carried by the flowing gas.

[0023] By adopting the above technical solution, the sealing block is fitted in the plug-in channel through its own deformation interference fit, so as to realize the rapid and stable installation of the breathable mesh plate in the connecting pipe; the wet wipe cloth can allow airflow to pass through the breathable mesh plate, block and collect metal debris carried in the airflow, thereby helping to protect the negative pressure suction machine and facilitating the operator to quickly remove the metal debris on the wet wipe cloth or replace the wet wipe cloth by removing the sealing block.

[0024] In summary, this application has at least the following beneficial technical effects: The base is used to place the metal box to be polished, and the weld can be located on both sides of the base, and the sanding belts located on both sides of the base can directly rough-grind the weld, thereby reducing the inconvenience of operators manually supporting the metal box and sending it to the sanding belt for polishing; the locking structure positions the metal box on the base to achieve automatic positioning of the metal box on the base, further reducing the inconvenience of human intervention and possible positioning instability; the lifting cylinder can drive the sanding belt to approach or away from the weld through the distance adjustment component, so that the sanding belt can deeply or lightly polish the weld, realizing adjustable polishing degree of the sanding belt polishing weld; the dust cover can cover the sanding belt and the part to be polished of the metal box, effectively reducing the problem of metal debris splashing everywhere, polluting the environment and being difficult to clean. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is a schematic structural diagram of an electric grinder in an embodiment of the present application; Figure 2 is a schematic diagram of a metal box body in an embodiment of the present application; Figure 3 is a schematic diagram of the second rotary clamping cylinder abutting against the metal box body in the embodiment of the present application; Figure 4It is a schematic diagram of the first rotating clamping cylinder in the embodiment of the present application abutting against the limiting bracket to hold the metal box body; Figure 5 It is a schematic diagram of the connection relationship among the jacking cylinder, the distance adjustment assembly, and the deviation rectifying unit in the embodiment of the present application; Figure 6 It is a schematic diagram of the positional relationship between the tensioning mechanism and the abrasive belt in the embodiment of the present application; Figure 7 It is a schematic diagram of the connection relationship among the connecting pipe, the negative pressure suction machine, and the dust-proof cover in the embodiment of the present application; Figure 8 It is an exploded schematic diagram of the positional relationship between the waste chip collection device and the connecting pipe in the embodiment of the present application.

[0026] Explanation of reference numerals: 1. Base; 11. Abrasive belt; 12. Distance adjustment channel; 13. Guide groove; 2. Locking mechanism; 21. Limiting bracket; 211. First top plate; 212. Second top plate; 22. First rotating clamping cylinder; 23. Abutting plate; 24. Second rotating clamping cylinder; 3. Distance adjustment mechanism; 31. Jacking cylinder; 32. Distance adjustment assembly; 321. Top connecting plate; 322. Abrasive belt abutting plate; 33. Deviation rectifying unit; 331. Fixed frame; 332. Deviation rectifying rod; 34. Guide rod; 4. Tensioning mechanism; 41. Mounting frame; 42. Connecting plate; 43. Tensioning guide wheel; 5. Dust-proof cover; 51. Connecting pipe; 511. Insertion channel; 52. Negative pressure suction machine; 53. Waste chip collection device; 531. Ventilated mesh plate; 532. Wet wipe; 533. Sealing block; 6. Metal box body. Detailed implementation manners

[0027] The embodiment of the present application discloses an electric grinding machine.

[0028] The following Figure 1-8 further elaborates on the present application in detail.

[0029] Referring to Figure 1 and Figure 2 , an electric grinding machine is used for automatically rough grinding the welds of the metal box body 6. In this embodiment, the metal box body 6 can be a box body formed by welding three steel plates. Among them, the three steel plates can be a U-shaped steel plate and two rectangular steel plates. The two rectangular steel plates have the same size and the outer peripheral size is smaller than that of the U-shaped steel plate. After the construction personnel weld the two rectangular steel plates to both ends of the U-shaped steel plate in the length direction by welding equipment, a total of four welds are formed at the joints of the U-shaped steel plate and the two rectangular steel plates of the welded metal box body 6. Two adjacent welds are located at one end of the metal box body 6 in the length direction, and the two adjacent welds are distributed on both sides of the metal box body 6 in the width direction.

[0030] Referring to Figure 2 and Figure 3 The electric grinder includes a base 1 and two abrasive belts 11 rotatably arranged at both ends of the base 1 in the length direction. The base 1 can be a metal box made of steel plate, the length of the base 1 is smaller than the width of the metal box 6, and the top wall of the base 1 is used for placing the metal box 6 to be roughly ground. After the operator places the metal box 6 on the top wall of the base 1 in the vertical direction, since the length of the base 1 is smaller than the length of the metal box 6, the two welds located on both sides of the width direction of the metal box 6 are located outside the base 1, which is convenient for the abrasive belt 11 to roughly grind the welds.

[0031] Reference Figure 3 Two abrasive belts 11 are driven by a driving wheel and a plurality of driven wheels to rotate on the end walls at both ends of the length direction of the base 1. The motor for driving the driving wheel to rotate is located in the base 1. The abrasive belts 11 on the end wall of the base 1 are polygonal. In this embodiment, the abrasive belts 11 are rectangular in shape. The top of the abrasive belts 11 is horizontal and located below the weld, so as to contact the bottom wall of the metal box body 6 in the horizontal direction, thereby performing a rough grinding process on the weld of the metal box body 6.

[0032] Reference Figure 1 and Figure 4 The electric grinder further comprises a locking mechanism 2, which further comprises a limiting bracket 21, a rotating clamping cylinder 22 and a stop plate 23. The limiting bracket 21 comprises a first top plate 211 and a second top plate 212 which are perpendicular to each other and are L-shaped. In this embodiment, the first top plate 211 is welded to the top wall of the base 1 along the length direction of the base 1, and one end of the first top plate 211 in the length direction extends to the outside of the base 1. The second top plate 212 is located on one end of the first top plate 211 extending to the outside of the base 1, so as to abut against the metal box body 6 outside the base 1.

[0033] Reference Figure 4 , the stop plate 23 is also welded to the top wall of the base 1 along the length direction of the base 1, and a gap is left between the stop plate 23 and the first top plate 211, and the side wall of the stop plate 23 in the width direction is coplanar with the side wall of the first top plate 211 in the width direction. When the metal box body 6 is placed on the top wall of the base 1, the first top plate 211 and the stop plate 23 can abut the metal box body 6 together on the top wall of the base 1 in the same plane. The second top plate 212 can abut the metal box body 6 outside the base 1. At this time, the metal box body 6 is abutted by the first top plate 211, the stop plate 23 and the second top plate 212 at the same time, and the two side walls of the metal box body 6 are limited at the same time, so that the metal box body 6 can be initially positioned on the top wall of the base 1.

[0034] Reference Figure 4The rotary clamping cylinder 22 is fixed to the top wall of the base 1 by bolts, and the rotary clamping cylinder 22 is located at the end of the abutment plate 23 away from the first top plate 211. When the metal box body 6 abuts against the abutment plate 23, the first top plate 211 and the second abutment plate at the same time, the rotary clamping cylinder 22 can rotate the output end and abut the output end against the metal box body 6, thereby enabling the metal box body 6 to be abutted against the side wall of the second top plate 212.

[0035] Reference Figure 4 At this time, the position of the metal box body 6 placed on the top wall of the base 1 along the length direction of the base 1 is limited by the rotating clamping cylinder 1 22 and the second top plate 212, and one side of the metal box body 6 in the width direction is simultaneously abutted by the first top plate 211 and the abutment plate 23, and the two groups of abrasive belts 11 can simultaneously rough grind the two welds on the metal box body 6 during the rotation process. This process can simultaneously rough grind the two welds of the metal box body 6, and not only reduces the inconvenience of the operator manually supporting the metal box body 6 for rough grinding, but also automatically positions the metal box body 6 by the rotating clamping cylinder 1 22, the first top plate 211, the second top plate 212 and the abutment plate 23, reducing the unstable positioning phenomenon that may be caused by manual positioning of the metal box body 6, and reducing the mis-grinding phenomenon that may be caused by the unstable manual positioning of the metal box body 6.

[0036] Reference Figure 3 In order to further improve the positioning stability of the metal box body 6 on the base 1, the locking mechanism 2 further includes a plurality of groups of rotating clamping cylinders 24. In this embodiment, the number of the rotating clamping cylinders 24 can be two groups, and the two groups of rotating clamping cylinders 24 are both fixed to the top wall of the base 1 by bolts, one group of rotating clamping cylinders 24 is symmetrical to the first top plate 211, and the other group of rotating clamping cylinders 24 is symmetrical to the abutment plate 23.

[0037] Reference Figure 3 and Figure 4 , when the metal box body 6 abuts against the first top plate 211, the abutment plate 23 and the second top plate 212 at the same time, the output ends of the two sets of rotating clamping cylinders 24 can simultaneously rotate and abut against the side wall of the metal box body 6 away from the first top plate 211 and the abutment plate 23, and then the metal box body 6 can be pressed against the first top plate 211 and the abutment plate 23. At this time, the four sides of the metal box body 6 are all pressed tightly. In the length direction of the base 1, the second top plate 212 can abut against the metal box body 6, and the rotating clamping cylinder 1 22 can press the metal box body 6 against the second top plate 212; in the width direction of the base 1, the first top plate 211 and the abutment plate 23 abut against the metal box body 6 at the same time, and the two sets of rotating clamping cylinders 24 can press the metal box body 6 against the first top plate 211 and the abutment plate 23 at the same time, and the position stability of the metal box body 6 on the base 1 is greatly improved.

[0038] Reference Figure 4 and Figure 5 The electric grinder also includes a distance adjustment mechanism 3, which is used to adjust the contact distance between the abrasive belt 11 and the weld, thereby changing the contact tightness between the abrasive belt 11 and the weld so that the abrasive belt 11 can perform deep grinding or light grinding on the weld. The distance adjustment mechanism 3 includes a lifting cylinder 31 and a distance adjustment assembly 32, wherein the lifting cylinder 31 is arranged in the base 1 by bolts, and the output end of the lifting cylinder 31 faces the metal box body 6.

[0039] Reference Figure 5 and Figure 6 The distance adjustment component 32 includes a top connecting plate 321 and a sand stop plate 322. The top connecting plate 321 is welded to the output end of the jacking cylinder 31 in the horizontal direction. A distance adjustment channel 12 is provided through the side wall of the base 1 in the horizontal direction. The distance adjustment channel 12 extends in the height direction of the base 1. One end of the top connecting plate 321 in the length direction passes through the distance adjustment channel 12 and is located outside the base 1. The sand stop plate 322 is welded to the top wall of the top connecting plate 321, and the sand stop plate 322 is located outside the base 1. The top wall of the sand stop plate 322 can be abutted against the side wall of the sand belt 11 facing the sand stop plate 322.

[0040] Reference Figure 5 and Figure 6 After the lifting cylinder 31 extends the output end, the top connecting plate 321 can carry the sanding plate 322 to move in the vertical direction toward the metal box body 6, so that the contact between the sand belt 11 and the weld is closer, and the weld can be deeply polished during the rotation of the sand belt 11. After the lifting cylinder 31 shrinks the output end, the top connecting plate 321 can carry the sanding plate 322 to move in the vertical direction away from the metal box body 6. At this time, the contact tightness between the sand belt 11 and the weld is reduced, and the rotating sand belt 11 can lightly polish the surface of the weld. This process effectively controls the degree of polishing of the weld by the sand belt 11, and reduces the problem of excessive polishing or insufficient polishing of the metal box body 6 during the polishing of the metal box body 6 by the sand belt 11.

[0041] Reference Figure 5 and Figure 6 In order to ensure the comprehensiveness of the abutment between the abrasive belt 11 and the weld, the distance adjustment assembly 32 also includes a correction unit 33 for limiting the moving direction of the abrasive plate 322. The correction unit 33 includes a fixed frame 331 and a correction rod 332, wherein the fixed frame 331 can be a steel frame made of an L-shaped steel plate, and the vertical plate of the fixed frame 331 is welded to the inner bottom wall of the base 1 in the vertical direction. The fixed frame 331 is located below the top connecting plate 321 and is located at the end of the top connecting plate 321 away from the abrasive plate 322. The correction rod 332 is welded to the side wall of the top connecting plate 321 facing the fixed frame 331 in the vertical direction, and the end of the correction rod 332 away from the top connecting plate 321 passes through the horizontal plate of the fixed frame 331.

[0042] Reference Figure 5 and Figure 6 In the process of lifting the output end of the cylinder 31, as the top connecting plate 321 carries the sand plate 322 up and down, the correction rod 332 can reciprocate relative to the horizontal plate of the fixed frame 331. In this process, the horizontal plate of the fixed frame 331 provides lateral support to the correction rod 332 to ensure that the top connecting plate 321 and the sand plate 322 can always move in the vertical direction, thereby helping to ensure the comprehensive contact between the sand belt 11 and the weld.

[0043] Reference Figure 5 and Figure 6 In order to ensure the precision of the abutting of the abrasive belt 11 and the weld by the abrasive plate 322, the distance adjustment assembly 32 further includes a guide rod 34. The guide rod 34 is welded to the side wall of the abrasive plate 322 facing the base 1 in the horizontal direction. The end walls at both ends of the length direction of the base 1 are provided with guide grooves 13 in the vertical direction. The guide grooves 13 extend in the vertical direction. Both ends of the guide grooves 13 in the height direction are closed, and the inner diameter of the guide grooves 13 matches the outer diameter of the guide rod 34.

[0044] Reference Figure 5 and Figure 6 , the end of the guide rod 34 away from the sand plate 322 can be inserted into the guide groove 13. When the sand plate 322 moves along the vertical direction with the top connecting plate 321, the guide rod 34 can adapt and move along the length direction of the guide groove 13 to further ensure that the sand plate 322 can always move in the vertical direction. In addition, when the guide rod 34 abuts against the inner top wall of the guide groove 13, it is difficult for the sand plate 322 to further carry the sand belt 11 close to the weld. At this time, the weld can be completely rough-ground, which helps to reduce the phenomenon that the non-weld part of the metal box body 6 is over-grinded by the sand belt 11. When the guide rod 34 abuts against the inner bottom wall of the guide groove 13, the sand belt 11 just has basic contact with the surface of the weld, which helps to reduce the phenomenon that the sand belt 11 is separated from the weld and the sand belt 11 rotates but cannot rough-grind the weld.

[0045] Reference Figure 6 In order to ensure the rough grinding efficiency of the abrasive belt 11 on the weld and reduce the phenomenon that the contact surface between the abrasive belt 11 and the weld is sufficient but the rough grinding cannot be effectively performed, the electric grinder further includes a tensioning mechanism 4. The tensioning mechanism 4 includes a mounting frame 41, a connecting plate 42 and a tensioning guide wheel 43, wherein the mounting frame 41 is fixed to the end wall of the base 1 in the length direction by bolts, and the mounting frame 41 is located inside the abrasive belt 11.

[0046] Reference Figure 6The connecting plate 42 is tiltedly arranged on the mounting frame 41, and the tensioning guide wheel 43 is rotatably arranged on the side wall of the connecting plate 42 through a bearing. The tensioning guide wheel 43 abuts against the sand belt 11, and is located inside the sand belt 11 together with the adjacent sanding plate 322. In addition, the tensioning belt wheel is symmetrically distributed with the sanding plate 322 inside the sand belt 11. In this embodiment, due to the abutment of the tensioning guide wheel 43 against the sand belt 11, the sand belt 11 is pentagonal, and the tension of the sand belt 11 is greatly improved, thereby effectively ensuring the contact of the sand belt 11 with the weld during the rotation process, ensuring the grinding effect of the sand belt 11 on the weld, and reducing the phenomenon that the sand belt 11 is in contact with the weld but cannot effectively grind the weld due to insufficient tension of the sand belt 11.

[0047] Reference Figure 1 and Figure 7 In order to reduce the problem of metal debris splashing around when the abrasive belt 11 is used to grind the weld, polluting the environment and being difficult to clean, the electric grinder also includes a dust cover 5. In this embodiment, the number of dust covers 5 can be two, and the two dust covers 5 are respectively installed at both ends of the length direction of the base 1 by bolts. One dust cover 5 can cover an abrasive belt 11 and the part to be grinded by the abrasive belt 11 on the metal box body 6, thereby preventing the metal debris from splashing around.

[0048] Reference Figure 7 and Figure 8 The side wall of the dust cover 5 is also connected with a connecting pipe 51, the inner cavity of the connecting pipe 51 is connected with the inner cavity of the dust cover 5, and a negative pressure suction machine 52 is arranged at one end of the connecting pipe 51 away from the dust cover 5. When the sanding belt 11 is grinding the weld, the negative pressure suction machine 52 can suck the metal debris in the dust cover 5 through the connecting pipe 51, thereby reducing the accumulation of metal debris in the dust cover 5.

[0049] Reference Figure 8 The connecting pipe 51 is also provided with a waste collection device 53, which includes a breathable mesh plate 531, a wet wipe 532 and a sealing block 533. The breathable mesh plate 531 can be a hollow mesh plate made of woven steel wire, and the sealing block 533 is a deformable hard rubber block, and the outer circumference of the sealing block 533 is larger than the outer circumference of the breathable mesh plate 531. The wet wipe 532 can be a wet non-woven fabric soaked with metal glue, and the wet wipe 532 is glued and fixed to the side wall of the breathable mesh plate 531.

[0050] Reference Figure 8, a plug-in channel 511 is provided vertically through the connecting pipe 51, and the inner diameter of the plug-in channel 511 is smaller than the outer circumference of the sealing block 533. After the breathable mesh plate 531 with the wet wipes 532 passes through the plug-in channel 511, the sealing block 533 can be fitted in the plug-in channel 511 by deformation interference, thereby positioning the breathable mesh plate 531 with the wet wipes 532 in the connecting pipe 51. In the process of the negative pressure suction machine 52 sucking air through the connecting pipe 51, the airflow can pass through the breathable mesh plate 531 with the wet wipes 532, and the metal debris entrained in the airflow can be blocked and adhered by the wet wipes 532. The operator can regularly pull out the sealing block 533 from the plug-in channel 511 to clean or replace the wet wipes 532, so as to clean the metal debris and replace the wet wipes 532.

[0051] The implementation principle of the electric grinder in the embodiment of the present application is as follows: the top wall of the base 1 is used to place the metal box body 6 to be grinded, and the weld is located on both sides of the base 1, so that the abrasive belt 11 can directly grind the weld. This process effectively reduces the phenomenon that the traditional operator manually supports the metal box body 6 and then sends it to the position of the abrasive belt 11 so that the abrasive belt 11 can grind the weld roughly, reducing the inconvenience of manually supporting the metal box body 6.

[0052] The first top plate 211 and the abutment plate 23 simultaneously abut the metal box body 6 on the top wall of the base 1, and the second box body abuts the metal box body 6 on one side of the base 1. At this time, the two side walls of the metal box body 6 can be abutted at the same time. The rotary clamping cylinder 1 22 can abut the metal box body 6 in the length direction of the base 1 and press the metal box body 6 against the second top plate 212. The rotary clamping cylinder 2 24 can abut the metal box body 6 in the width direction of the base 1 and press the metal box body 6 against the first top plate 211 and the abutment plate 23. At this time, the four side walls of the metal box body 6 are pressed at the same time, and the metal box body 6 is stably positioned on the base 1, thereby effectively reducing the instability that may be caused by traditional manual support of the metal box body 6, reducing the difficulty of operation for operators, and helping to ensure the accuracy of the rough grinding of the weld by the abrasive belt 11.

[0053] After the lifting cylinder 31 retracts the output end, the top connecting plate 321 can carry the sanding plate 322 and the sanding belt 11 close to or away from the weld, so as to adjust the contact tightness between the sanding belt 11 and the weld, so that the sanding belt 11 can perform deep grinding or light grinding on the weld, which effectively improves the problem that the grinding degree cannot be adjusted when the sanding belt 11 roughly grinds the weld, and reduces the problem of excessive grinding of the metal box body 6 by the sanding belt 11 or insufficient grinding of the weld.

[0054] The dust cover 5 can cover the sanding belt 11 and the position to be sanded of the metal box body 6, effectively reducing the problem of metal debris splashing everywhere, thereby polluting the environment and being difficult to clean.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An electric grinder, comprising a base (1), wherein two opposite sides of the base (1) are rotatably provided with abrasive belts (11) for rough grinding a metal box body (6), characterized in that: The top wall of the base (1) is used for placing the metal box body (6), and the portion of the metal box body (6) to be roughly ground is located outside the base (1) and above at least one of the abrasive belts (11) so as to be roughly ground by the abrasive belt (11); A locking mechanism (2) is arranged on the base (1), and the locking mechanism (2) is used to position the metal box body (6) on the top wall of the base (1); A distance adjustment mechanism (3), the distance adjustment mechanism (3) comprising a lifting cylinder (31) arranged in the base (1) and a distance adjustment component (32) arranged on the output end of the lifting cylinder (31); one end of the distance adjustment component (32) passes through the base (1) and abuts against the adjacent sanding belt (11); the lifting cylinder (31) can enable the distance adjustment component (32) to carry the sanding belt (11) close to the part of the metal box body (6) to be roughly ground for deep grinding, or to move away from the part of the metal box body (6) to be roughly ground for light grinding by telescoping the output end; The dust cover (5) is arranged on two opposite sides of the base (1), and one of the dust covers (5) can cover a sanding belt (11) and a portion of the metal box body (6) to be roughly ground at the sanding belt (11).

2. The electric grinder according to claim 1, characterized in that: The locking mechanism (2) comprises a limiting bracket (21), a rotating clamping cylinder (22) and a stop plate (23) located between the limiting bracket (21) and the rotating clamping cylinder (22). The limiting bracket (21) comprises a first top plate (211) and a second top plate (212) which are vertically arranged; the first top plate (211) and the abutting plate (23) are both located on the top wall of the base (1) and are coplanar so as to abut the metal box body (6) together; the second top plate (212) is located at one end of the first top plate (211) away from the abutting plate (23), and the second top plate (212) is located outside the base (1); the metal box body (6) abuts against the abutting plate (23), the first top plate (211) and the second top plate (212) at the same time, and the rotating clamping cylinder (22) can abut against the metal box body (6) and press the metal box body (6) against the side wall of the second top plate (212).

3. The electric grinder according to claim 2, characterized in that: The locking mechanism (2) further comprises a plurality of groups of rotating clamping cylinders (24); at least two groups of the rotating clamping cylinders (24) are arranged corresponding to the first top plate (211) and the abutting plate (23); the rotating clamping cylinders (24) are capable of abutting against the metal box body (6) and making the metal box body (6) abut against the side walls of the first top plate (211) and the abutting plate (23).

4. The electric grinder according to claim 1, characterized in that: The distance adjustment component (32) comprises a top connecting plate (321) arranged on the output end of the jacking cylinder (31) and a sand-resisting plate (322) arranged on the top connecting plate (321); The base (1) is provided with a distance adjustment channel (12) for allowing one end of the top connecting plate (321) connected to the sanding plate (322) to pass through, and the side wall of the sanding plate (322) away from the top connecting plate (321) abuts against the sanding belt (11).

5. The electric grinder according to claim 4, characterized in that: The distance adjustment component (32) further comprises a guide rod (34) arranged on the sand stop plate (322), and a guide groove (13) capable of being inserted into and adapted to slide by the guide rod (34) is arranged on the side wall of the base (1).

6. The electric grinder according to claim 4, characterized in that: The distance adjustment component (32) further comprises a deviation correction unit (33), wherein the deviation correction unit (33) comprises a deviation correction rod (332) arranged on one end of the top connecting plate (321) away from the sand stop plate (322) and a fixing frame (331) arranged in the base (1); the end of the deviation correction rod (332) away from the top connecting plate passes through the fixing frame (331) and can reciprocate relative to the fixing frame (331) following the extension and retraction of the output end of the jacking cylinder (31).

7. The electric grinder according to claim 4, characterized in that: The electric grinder also includes a tensioning mechanism (4), the tensioning mechanism (4) including mounting frames (41) arranged on opposite sides of the base (1), a connecting plate (42) obliquely arranged on one side of the mounting frame (41), and a tensioning guide wheel (43) rotatably arranged on the connecting plate (42); The tensioning guide wheel (43) and the adjacent sanding plate (322) are both located in the same sanding belt (11); the tensioning guide wheel (43) abuts against the sanding belt (11) and is symmetrical with the sanding plate (322) in the sanding belt (11).

8. The electric grinder according to claim 1, characterized in that: The dust cover (5) is also provided with a communication pipe (51), and a negative pressure suction machine (52) is provided at one end of the communication pipe (51) away from the dust cover (5), and the negative pressure suction machine (52) sucks metal scraps in the dust cover (5) through the communication pipe (51); a metal scrap collection mechanism can also be detachably mounted on the communication pipe (51).

9. The electric grinder according to claim 8, characterized in that: The metal scrap collection mechanism comprises an air-permeable mesh plate (531), a wet wipe cloth (532) arranged on the side wall of the air-permeable mesh plate (531), and a sealing block (533) arranged at one end of the air-permeable mesh plate (531); The sealing block (533) is deformable, and the outer circumference of the sealing block (533) is larger than the outer circumference of the air-permeable mesh plate (531); the connecting pipe (51) is provided with a plug-in channel (511) into which the sealing block (533) can be inserted and interference-fitted; the air-permeable mesh plate (531) carrying the wet wipes (532) can allow gas to pass through the connecting pipe (51) and block metal scraps carried in the flowing gas.

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