Polishing device and polishing method

Abstract

The invention provides a polishing device and a polishing method. The grinding device comprises a sliding platform, a grinding execution assembly, a tensioning assembly, a limiting assembly and a reciprocating driving assembly. The limiting assembly comprises a swing part and a limiting wheel. The first end of the swing part is connected with the grinding wheel and the limiting wheel, and the difference value between the sum of the radius of the grinding wheel and the thickness of the abrasive belt and the limiting wheel is larger than or equal to zero and smaller than or equal to the preset wall plate concave depth. The second end of the swing part is rotationally connected to the sliding platform through a bearing assembly, the bearing assembly and the driving rotating shaft are coaxially arranged, and a gap is formed between the bearing assembly and the driving rotating shaft. The adjusting part is connected with the adjusting shaft, the adjusting shaft is connected to the holder, a tensioning rotating shaft of the tensioning wheel is fixed to the adjusting shaft, the adjusting part can drive the adjusting shaft to rotate, and then the distance between the tensioning wheel and the polishing wheel is changed. The reciprocating driving assembly drives the sliding platform, the grinding executing assembly, the tensioning assembly and the limiting assembly to do reciprocating motion in the direction perpendicular to the grinding rotating shaft and parallel to the wall plate.

Description

TECHNICAL FIELD

[0001] The present application relates to polishing equipment, in particular to a polishing device and a polishing method. BACKGROUND

[0002] In the process of removing key structural components such as steel containment in nuclear power field, the accuracy of polishing operation point and the non-destructive property of base material have very high requirements. At present, the construction site mainly relies on workers holding polishing machines and other handheld devices to polish the residual welds on the wallboard and remove small protrusions on the steel containment.

[0003] However, the above polishing operation mode has the following problems: first, since the polishing process is heavily dependent on the experience and skills of workers, it is difficult to ensure the uniformity and consistency of the polishing effect. Secondly, due to the large amount of tasks, combined with the harsh working environment, such as high temperature, high noise, etc., and after the temporary accessory is removed, the residual weld thickness is thick (there are metal protrusions, not simply rust removal), which makes the polishing work efficiency low. SUMMARY

[0004] The purpose of the present application is to provide a polishing device and a polishing method.

[0005] One aspect of the present application provides a polishing device for polishing metal protrusions on a wallboard, the wallboard being a straight board; the polishing device comprising a sliding platform, a polishing execution assembly, a tensioning assembly, a limiting assembly and a reciprocating driving assembly; wherein the polishing execution assembly comprises a polishing wheel, a driving wheel, a sand belt and a driving piece, the tensioning assembly comprises a tensioning wheel, the sand belt is drivingly connected between the polishing wheel, the tensioning wheel and the driving wheel; the driving piece is arranged on the sliding platform and connected to a driving shaft of the driving wheel; the limiting assembly comprises a swing piece and a limiting wheel; a first end of the swing piece is connected to the polishing wheel and the limiting wheel, wherein a difference between a radius of the polishing wheel and a thickness of the sand belt is greater than or equal to zero and less than or equal to a preset wallboard recess depth; a second end of the swing piece is rotatably connected to the sliding platform through a bearing assembly, the bearing assembly and the driving shaft are coaxial, and the bearing assembly and the driving shaft have a gap therebetween; the polishing execution assembly further comprises a holder, the driving shaft and a polishing shaft of the polishing wheel are connected to the holder; the tensioning assembly further comprises an adjusting shaft and an adjusting piece, the adjusting piece is connected to the adjusting shaft, the adjusting shaft is connected to the holder, a tensioning shaft of the tensioning wheel is fixed to the adjusting shaft, the adjusting piece can drive the adjusting shaft to rotate, thereby changing a distance between the tensioning wheel and the polishing wheel; the reciprocating driving assembly is connected to the sliding platform to drive the sliding platform and the polishing execution assembly, the tensioning assembly and the limiting assembly to move reciprocally in a direction perpendicular to the polishing shaft and parallel to the wallboard.

[0006] In an embodiment, the adjusting piece comprises a crank and a guide rod; the crank is fixedly connected to the adjusting shaft, the crank is provided with a guide groove; the guide rod has a guide protrusion, the guide protrusion is in contact with the guide groove and can slide in the guide groove; the guide protrusion is moved in the guide groove by the guide rod to make the crank rotate, thereby driving the adjusting shaft to rotate.

[0007] In an embodiment, the guide rod comprises a lead screw and a tensioning slider; the guide protrusion is arranged on the tensioning slider, the tensioning slider cooperates with the lead screw; the lead screw is configured to be operable to rotate to make the tensioning slider move along the lead screw.

[0008] In an embodiment, the guide rod further comprises a handle, the handle is fixed to an end of the lead screw; the swing piece comprises a pressing portion and a fixing block; the pressing portion provides a mounting channel, the lead screw is accommodated in the mounting channel, the handle is located outside the mounting channel; the lead screw has a concave recess, the fixing block has a groove, the recess of the lead screw is clamped in the groove of the fixing block, and the fixing block is fixed to the pressing portion.

[0009] In an embodiment, the tensioning slider comprises a limiting portion and a sliding portion; the sliding portion is engaged with the screw rod; the guide block and the limiting portion are arranged on opposite sides of the sliding portion; the mounting channel is arranged along the length direction of the pressing portion, and comprises a window penetrating in a direction perpendicular to the length direction of the pressing portion; the sliding portion is movable in the window under the guidance of the screw rod, and the limiting portion is abutted against the pressing portion.

[0010] In an embodiment, the limiting portion is provided with a fixing hole, and the pressing portion is provided with an elongated hole along the length direction; a fastener is sequentially arranged through the elongated hole and the fixing hole.

[0011] In an embodiment, the first end of the polishing shaft is fixed on the holder; the second end of the polishing shaft is arranged through the second end of the pressing portion and the limiting wheel; the polishing shaft is fixed on the pressing portion, and the limiting wheel is rotatably arranged on the polishing shaft.

[0012] In an embodiment, the limiting assembly further comprises an elastic mechanism; one end of the elastic mechanism is fixed on the sliding platform, and the other end of the elastic mechanism is fixed on the swing piece; the elastic mechanism provides a pulling force to the swing piece in a direction close to the wallboard.

[0013] In an embodiment, the reciprocating driving assembly comprises a linear driving mechanism, a guide slider and a guide rail; the linear driving mechanism comprises a driving motor, a screw rod and a screw nut; the driving motor is connected to the screw rod; the screw nut is engaged with the screw rod to convert the rotating motion of the screw rod into linear motion; the guide slider is arranged on the guide rail and is capable of sliding along the guide rail; the guide rail is arranged in parallel to the screw rod; the screw nut and the guide slider are fixedly connected to the sliding platform; and / or the polishing device further comprises a bottom plate and a magnetic piece; the reciprocating driving assembly and the magnetic piece are arranged on the bottom plate; the magnetic piece has magnetism and is capable of being adsorbed on a wallboard made of metal material.

[0014] Another aspect of the present application provides a polishing method applied to the polishing device in any of the above embodiments; the polishing method comprises: moving the polishing device to arrange the polishing device on a wallboard; aligning the polishing wheel of the polishing device with a metal protrusion to be polished; starting the polishing device to rotate the abrasive belt to polish the metal protrusion; observing the amount of sparks generated by polishing; and determining whether the polishing work of the metal protrusion is completed according to the amount of sparks.

[0015] The driving rotation shafts of the swing piece and the driving wheel of the polishing device of the application are coaxial, the distance between the driving wheel and the polishing wheel is kept constant by the retainer, the coaxial and equidistant rotation of the swing piece and the polishing wheel and the driving wheel can be realized, the relationship between the radius of the limiting wheel, the radius of the polishing wheel and the thickness of the abrasive belt is controlled, the limiting wheel is also pressed down when the swing piece is pressed down under rotation, the degree of pressing down of the swing piece is prevented from being too large to exceed the limit of the depth of the concave of the base material, and the polishing force is self-adaptively adjusted; on the basis of the coaxial and equidistant rotation of the swing piece and the polishing wheel and the driving wheel, the tension degree of the abrasive belt can be adjusted by changing the distance between the tension wheel and the polishing wheel, without complex tension structure or simultaneous adjustment of multiple rollers, the structure is simple, the mutual influence during movement is avoided by keeping the gap between the driving rotation shaft and the bearing assembly, and the stability of the device is improved.

[0016] The application can self-adaptively adjust the polishing force, avoid the interference between structures, and realize the reciprocating polishing of the metal protrusion in a small space with a simple structure, solves the deficiencies of the existing handheld polishing equipment in polishing quality, efficiency and stability, realizes the automatic polishing of the residual weld and other metal protrusions on the nuclear power construction site, ensures the efficiency and non-damage to the base material during the polishing process, and thus improves the polishing operation quality and safety in harsh environments such as nuclear power sites. BRIEF DESCRIPTION OF DRAWINGS

[0017] The above and other features, properties and advantages of the application will become more apparent through the following description with reference to the accompanying drawings and embodiments, in which:

[0018] Figure 1 is a schematic view of a wallboard cooperating with an embodiment of the polishing device according to the application;

[0019] Figure 2 is Figure 1 a structural schematic view of the polishing device shown in FIG. 1;

[0020] Figure 3 is Figure 2 a schematic view of the driving wheel, the polishing wheel and the tension wheel of the polishing device shown in FIG. 1;

[0021] Figure 4 is Figure 2 a schematic view of the swing piece, the retainer and the driving piece of the polishing device shown in FIG. 1;

[0022] Figure 5 is Figure 2 a schematic view of the limiting assembly of the polishing device shown in FIG. 1;

[0023] Figure 6 is Figure 2 a positional relationship schematic view of the retainer and the driving wheel of the polishing device shown in FIG. 1;

[0024] Figure 7 is Figure 2 a partial structural sectional view of the grinding device shown in

[0025] Figure 8 is Figure 7 an enlarged view of A in

[0026] Figure 9 is Figure 2 a schematic view of the driving member and the reciprocating driving assembly of the grinding device shown in

[0027] Figure 10 is Figure 2 a schematic view of the cooperation of the bottom plate, the reciprocating driving assembly and the driving member of the grinding device shown in

[0028] Figure 11 is Figure 2 a schematic view of the reciprocating driving assembly of the grinding device shown in

[0029] Figure 12 is Figure 2 a schematic view of the bottom plate and the magnetic member of the grinding device shown in

[0030] Figure 13 is the grinding operation process before improvement;

[0031] Figure 14 is a flowchart of the grinding method according to an embodiment of the present application. DETAILED DESCRIPTION

[0032] Reference will now be made in detail to embodiments of the application, one or more examples of which are illustrated in the drawings. Each example is provided by way of explanation of the application, not limitation of the application. In fact, it will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the scope or spirit of the application. For instance, features illustrated or described as part of one embodiment, can be used with another embodiment to yield a still further embodiment. Thus, it is intended that the present application cover modifications and variations of this application provided they come within the scope of the appended claims and their equivalents.

[0033] As used herein, the term "axial" is a direction parallel to the central axis of the structure, the term "radial" is a direction perpendicular to the "axial", and the term "circumferential" is a direction around the "axial".

[0034] Figure 1 and Figure 2The structure of an embodiment of the polishing device of the present application is shown. The polishing device of the present application is used for polishing the metal protrusion 11 on the wall plate 10. The wall plate 10 is the base material, which is a nuclear power steel containment wall plate 10 made of metal material, and can also be a metal plate in other fields.

[0035] The state of the wall plate 10 includes but is not limited to a vertical state (perpendicular to the horizontal plane or the ground), a horizontal state (parallel to the ground or the horizontal plane), and an inclined state (inclined relative to the horizontal plane or the ground).

[0036] The wall plate 10 can be a straight plate or a curved plate with small curvature.

[0037] The metal protrusion 11 on the wall plate 10 is the residual metal after cutting the metal part. The "metal protrusion" in the present application refers to the residual object after cutting the temporary accessory used for splicing the nuclear power steel containment (metal tank body) plate, including residual welds. In the above specific working conditions, the surface size of the residual object is 60x60mm, the remaining height is about 3mm, the material is steel, and it is difficult to remove.

[0038] As shown in Figures 1 to 6 The polishing device of the present application includes a sliding platform 100, a polishing execution assembly 200, a tensioning assembly 300, a limiting assembly, and a reciprocating driving assembly 500. The polishing execution assembly 200 includes a polishing wheel 210, a driving wheel 220, a sand belt 230, and a driving piece 240, and the tensioning assembly 300 includes a tensioning wheel 310. The sand belt 230 is drivingly connected between the polishing wheel 210, the tensioning wheel 310, and the driving wheel 220, and is tensioned by the tensioning wheel 310. The driving piece 240 is arranged on the sliding platform 100, and the output shaft of the driving piece 240 is connected to the driving shaft 221 of the driving wheel 220. The sand belt 230 is driven to rotate in a predetermined direction by the driving wheel 220, the polishing wheel 210 is rotated by the friction force of the sand belt 230, and the outer surface of the sand belt 230 in contact with the polishing wheel 210 polishes the metal protrusion 11. The driving wheel 220 is fixed on the driving shaft 221, which is a roller driven by the output rotation of the driving piece 240 to drive the polishing wheel 210 to rotate. The polishing wheel 210 is a roller for contacting the polishing position (the outer surface of which is wrapped with the sand belt 230).

[0039] The predetermined direction of rotation of the sand belt 230 can be clockwise or counterclockwise, which is determined by the rotation direction of the driving shaft 221 of the driving wheel 220, and can be adjusted according to the site conditions, which is not limited by the present application.

[0040] The abrasive belt 230 of the present application can be selected as the abrasive belt 230 using ceramic aluminum oxide abrasive. The 3M abrasive belt 230 of the ceramic aluminum alloy abrasive can polish the edge of the metal protrusion 11 to achieve a smooth transition effect, and can also mill hard metal. According to the hardness of the polishing object, the abrasive belt 230 with the corresponding abrasive can be selected. The length and width of the abrasive belt 230 can be determined according to the driving wheel 220, the polishing wheel 210, the tensioning wheel 310, and the size of the metal protrusion 11 to be polished. By means of one-way reciprocating polishing, a wider metal protrusion / residual weld can be covered.

[0041] The three-wheel tensioning structure can fix the two ends of the wheel, prevent the polishing wheel 210 from being polished unevenly after tensioning when the cantilever is too long, and facilitate disassembly and adjustment of the tensioning force while ensuring structural strength.

[0042] The limiting assembly includes a swing piece 410 and a limiting wheel 420. The limiting assembly is used to limit the polishing height of the polishing wheel 210. The first end of the swing piece 410 is connected to the polishing wheel 210 and the limiting wheel 420. Specifically, the polishing shaft 211 (the center axis of the polishing shaft 211 is the rotation axis of the polishing wheel 210) of the polishing wheel 210 is fixed to the swing piece 410, and the polishing wheel 210 is pressed down by the rotation of the swing piece 410, so that the abrasive belt 230 contacts the metal protrusion 11. Specifically, this is achieved by pressing down the polishing wheel 210.

[0043] The limiting wheel 420 is further connected to the polishing shaft 211. The function of the limiting wheel 420 is to limit the excessive pressing of the polishing wheel 210, so as to prevent excessive polishing of the base material, and to ensure that the polishing height is within the specified value.

[0044] The first end of the polishing shaft 211 is fixed to the retainer 250. The second end of the polishing shaft 211 passes through the second end of the pressing part 411 and the limiting wheel 420. The polishing shaft 211 is fixed to the pressing part 411, and the limiting wheel 420 is rotatably arranged in the polishing shaft 211.

[0045] When the polishing device of the present application is in operation, the limiting wheel 420 moves with the polishing wheel 210. Under the pressure generated by the rotation of the swing piece 410 towards the wall plate 10, the outer surface of the limiting wheel 420 contacts the base material, and at this time, the limiting effect of the polishing wheel 210 is generated.

[0046] The height limiting of the limiting wheel 420 to the polishing wheel 210 is achieved by controlling the relationship between the radius R1 of the limiting wheel 420, the radius R2 of the polishing wheel 210 and the thickness T1 of the abrasive belt 230. Specifically, the difference between the sum of the radius of the polishing wheel 210 and the thickness of the abrasive belt 230 and the limiting wheel 420 is greater than or equal to zero and less than or equal to the preset wallboard 10 recess depth, that is, the preset wallboard 10 recess depth D≥Δ(R2+T1-R1)≥0. Wherein, the preset wallboard 10 recess depth D is derived from the site process requirements, that is, after polishing, the base material surface is not allowed to have metal protrusions 11 (the remaining height of the metal protrusion 11 is 0mm), and the recess depth of the base material cannot be greater than the preset wallboard 10 recess depth D. According to the field practice, the preset wallboard 10 recess depth D can be taken as 0.25mm, and if it exceeds 0.25mm, it belongs to damage the base material.

[0047] Through the above height limiting of the limiting wheel 420 to the polishing wheel 210, the abrasive belt 230 enveloped outside the polishing wheel 210 first contacts the metal protrusion 11, and the limiting wheel 420 is suspended and does not contact the base material. At this time, the abrasive belt 230 is effective in polishing, and a large amount of sparks will appear. When the outer cylindrical surface of the limiting wheel 420 contacts the base material, the pressure of the abrasive belt 230 enveloped on the polishing wheel 210 on the metal protrusion 11 is reduced, and when the pressure is zero, the polishing is automatically stopped, and at the same time, the phenomenon of obvious reduction or almost no sparks appears, at this time, it can be considered that the polishing is completed. Through physical testing, the limiting assembly of the present application can effectively avoid the problem of damaging the base material.

[0048] Considering that the limiting wheel 420 is made of rigid material, the abrasive belt 230 is more prone to wear relative to the polishing wheel 210; in addition, the longer the polishing time, the smaller the thickness T1 of the abrasive belt 230 will be, therefore, whether to replace the abrasive belt 230 is not based on the wear degree of the abrasive belt 230 itself, but based on the situation that the base material surface still has metal protrusions 11 after long-time polishing at a unified position to confirm whether the abrasive belt 230 needs to be replaced.

[0049] The second end of the swing member 410 is rotatably connected to the sliding platform 100 through a bearing assembly 600 to realize the function of pressing down the grinding wheel 210. The bearing assembly 600 and the driving shaft 221 are coaxial, and there is a gap G between the bearing assembly 600 and the driving shaft 221. Specifically, the bearing assembly 600 includes a rolling bearing 610 and a bearing fixing seat 620. The outer ring of the rolling bearing 610 is connected to the inner circumferential wall of the through hole of the second end of the swing member 410, and the inner ring of the rolling bearing 610 is connected to the bearing fixing seat 620, which fixes the rolling bearing 610 to the sliding platform 100. The driving shaft 221 passes through the bearing fixing seat 620 and is connected to the output shaft of the driving member 240 in the sliding platform 100. The through hole, the rolling bearing 610, the bearing fixing seat 620, and the driving shaft 221 are coaxial, and there is a gap G between the driving shaft 221 and the bearing fixing seat 620. That is, the second end of the swing member 410 is fixed to the sliding platform 100 through the bearing assembly 600, and the bearing fixing seat 620 is concentric with the driving shaft 221 of the driving wheel 220 but does not contact, which can avoid mutual influence during movement.

[0050] The grinding execution assembly 200 further includes a retainer 250 connected to the driving shaft 221 and the grinding shaft 211 of the grinding wheel 210. One end of the driving shaft 221 is connected to the driving member 240 to realize the function of rotating the driving shaft 221, and the other end is connected to the retainer 250. One end of the grinding shaft 211 is fixed to the swing member 410, and the other end is fixed to the retainer 250. The retainer 250 is a fixed structure, and its length and width do not change. Therefore, the distance between the driving shaft 221 and the grinding shaft 211 remains constant, which ensures that the distance between the rotation axes of the driving wheel 220 and the grinding wheel 210 remains unchanged in complex working conditions.

[0051] As shown in Figure 7 and Figure 8 , the tensioning assembly 300 further includes an adjusting shaft 320 and an adjusting member 330. The adjusting member 330 is connected to the adjusting shaft 320, and the adjusting shaft 320 is connected to the retainer 250, that is, one end of the adjusting shaft 320 is connected to the adjusting member 330, and the other end is connected to the retainer 250. The tensioning shaft 311 of the tensioning wheel 310 is fixed to the adjusting shaft 320, and the adjusting member 330 can drive the adjusting shaft 320 to rotate, thereby changing the distance between the tensioning wheel 310 and the grinding wheel 210. Among them, the adjusting shaft 320, the tensioning driving shaft 221 of the tensioning wheel 310, the driving shaft 221, and the grinding shaft 211 all extend along the first direction X-X, as shown in Figure 3 The first direction X-X is parallel to the plane on which the wallboard 10 is located.

[0052] By the design of the bearing fixing seat 620 concentric with the driving shaft 221 of the driving wheel 220 but not in contact and the cage 250, it can be ensured that the polishing wheel 210 can rotate around the driving wheel 220 with the driving shaft 221 as the rotation axis, and the design difficulty of the tensioning assembly 300 can be simplified. On the contrary, if the polishing wheel 210 cannot rotate at a fixed distance around the driving wheel 220, the complexity of the tensioning assembly 300 will be increased. If the tensioning assembly 300 cannot achieve a better tensioning effect due to the complex structure, the sand belt 230 will be easily broken or the tensioning will fail, which will seriously affect the polishing effect. Specifically, since the rotation axis of the swing member 410 is coaxial with the driving wheel 220, the distance between the polishing shaft 211 and the driving shaft 221 is always constant regardless of the position of the polishing wheel 210. On this basis, in order to realize the tensioning of the sand belt 230, only the distance between the tensioning wheel 310 and the polishing shaft 211 or the driving shaft 221 needs to be changed, and other complex structures are not required to realize the tensioning of the sand belt 230. In this way, a longer sand belt 230 can be placed in a small space. It can be understood that the long sand belt 230 has a longer heat dissipation time than the short sand belt 230, and is therefore more durable. Compared with the structure in which the driving wheel 220 and the polishing wheel 210 are respectively adjusted to center the tensioning wheel 310, the present application can use a longer sand belt 230 for polishing, and the short sand belt 230 can improve the durability of the sand belt 230.

[0053] The reciprocating driving assembly 500 is connected to the sliding platform 100 to drive the sliding platform 100, the polishing execution assembly 200, the tensioning assembly 300 and the limiting assembly to move linearly in a direction perpendicular to the polishing shaft 211 and parallel to the wall plate 10 (i.e. the second direction Y-Y, the second direction Y-Y is perpendicular to the first direction X-X) to realize the reciprocating polishing of the same metal protrusion 11 by the polishing wheel 210. The reciprocating polishing can avoid excessive heat accumulation at the polishing position, and reduce or even avoid the problems of burning the sand belt 230 and quenching the base material to increase the hardness of the base material.

[0054] The driving rotation shaft 221 of the driving wheel 220 and the swing piece 410 of the polishing device are coaxial, the distance between the driving wheel 220 and the polishing wheel 210 is kept constant by the retainer 250, the coaxial and equidistant rotation of the swing piece 410 and the polishing wheel 210 and the driving wheel 220 can be realized, and further, by controlling the relationship between the radius of the limiting wheel 420, the radius of the polishing wheel 210 and the thickness of the abrasive belt 230, the limiting wheel 420 can also be pressed down at the same time when the swing piece 410 rotates to press down the polishing wheel 210, so that the swing piece 410 is prevented from being pressed down too much to exceed the limit of the depth of the concave of the base material, and the polishing force is self-adaptively adjusted; on the basis of the coaxial and equidistant rotation of the swing piece 410 and the polishing wheel 210 and the driving wheel 220, the tension degree of the abrasive belt 230 can be adjusted by changing the distance between the tension wheel 310 and the polishing wheel 210, without a complex tensioning structure or simultaneously adjusting multiple rollers, so that the structure is simple, the mutual influence during movement can be avoided by keeping the gap G between the driving rotation shaft 221 and the bearing assembly 600, and the stability of the device is improved.

[0055] The polishing device can self-adaptively adjust the polishing force, avoid the interference between structures, and realize the reciprocating polishing of the metal protrusion 11 in a small space with a simple structure, solve the deficiencies of the existing handheld polishing equipment in polishing quality, efficiency and stability, realize the automatic polishing of the residual weld and other metal protrusions 11 on the nuclear power construction site, ensure the efficiency and non-damage of the base material during the polishing process, and thus improve the polishing operation quality and safety in harsh environments such as nuclear power sites.

[0056] As shown in Figure 3 and Figure 5 , in an embodiment, the adjusting piece 330 includes a crank 331 and a guide rod 332. The crank 331 is fixedly connected with the adjusting shaft 320, and the crank 331 is provided with a guide groove 3311. The crank 331 and the adjusting shaft 320 can be integrally formed; or as shown in Figure 3 , the crank 331 and the adjusting shaft 320 are fixedly connected by a fixing ring.

[0057] Continuing to refer to Figure 3 and Figure 5 , the swing piece 410 has an opening 413, a plurality of fixing rings 334, the crank 331, a plurality of fixing rings 334 and a bearing (not shown) are sequentially arranged on the adjusting shaft 320, and the bearing is arranged in the opening 413, so that the rotation of the crank 331 and the adjusting shaft 320 can be realized.

[0058] The guide rod 332 has a guide protrusion 333 which is in contact with the guide groove 3311 and can slide in the guide groove 3311. The guide protrusion 333 and the inner wall of the guide groove 3311 are in rigid contact, and the guide protrusion 333 is moved by the guide rod 332 to slide in the guide groove 3311, so as to rotate the crank 331, drive the adjusting shaft 320 to rotate, and realize the pressing or lifting of the tensioning wheel 310, and realize the tensioning or loosening of the abrasive belt 230.

[0059] In the embodiment, the crank 331 acts as a lever, and the fulcrum is the adjusting shaft 320. When the tensioning slider 3322 moves upward, the crank 331 is lifted, the tensioning wheel 310 is pressed downward, and the abrasive belt 230 is tensioned; on the contrary, the abrasive belt 230 is loosened.

[0060] One end of the adjusting shaft 320 is fixed on the swing member 410, and the other end is connected to the holder 250. The swing member 410 and the holder 250 do not displace relative to each other, and the stability of the adjusting shaft 320 is maintained. The adjusting shaft 320 is parallel to the axes of the driving wheel 220 and the polishing wheel 210, and the tensioning wheel 310 is parallel to the axes of the driving wheel 220 and the polishing wheel 210, so that the abrasive belt 230 rotates stably and has small bounce after being tensioned.

[0061] On the basis of the above embodiment, the guide rod 332 further includes a lead screw 3321 and a tensioning slider 3322. The guide protrusion 333 is arranged on the tensioning slider 3322, the lead screw 3321 is provided with a thread, and the tensioning slider 3322 cooperates with the lead screw 3321. The lead screw 3321 is configured to be operable to rotate, so as to move the tensioning slider 3322 along the lead screw 3321. By rotating the lead screw 3321 manually, the tensioning slider 3322 can move upward or downward along the lead screw 3321, and the guide protrusion 333 also moves, and the guide protrusion 333 slides in the guide groove 3311. In this way, the position of the tensioning wheel 310 can be changed, the rigid contact between the guide protrusion 333 and the crank 331 is combined, the replacement operation of the abrasive belt 230 is facilitated, and the stability of the tensioning effect is improved.

[0062] When the lead screw 3321 is rotated, the displacement of the tensioning slider 3322 is linearly corresponding to the rotation angle of the lead screw 3321, high-precision adjustment can be realized, mechanical self-locking can be formed between the lead screw 3321 and the tensioning slider 3322, the stability is better, and the position of the tensioning wheel 310 is stable.

[0063] Further, the guide rod 332 further comprises a handle 3323 fixed to the end of the screw rod 3321, and the handle 3323 can facilitate the rotation of the screw rod 3321. The swing member 410 comprises a pressing portion 411 and a fixing block 412. The pressing portion 411 provides a mounting channel 4111 in which the screw rod 3321 is accommodated, and the handle 3323 is located outside the mounting channel 4111. The screw rod 3321 has a concave recess (not shown) in the shape of a ring, and the fixing block 412 has a groove (not shown) in the shape of a U, which is adapted to the recess. The recess of the screw rod 3321 is clamped in the groove of the fixing block 412, and the fixing block 412 is fixed to the pressing portion 411, so as to stabilize the axial position of the screw rod 3321 in the mounting channel 4111 and prevent the axial movement of the screw rod 3321, without affecting or interfering with the rotation of the screw rod 3321 about the central axis thereof.

[0064] In combination Figure 3 and Figure 5 , the tensioning sliding block 3322 comprises a limiting portion 3322a and a sliding portion 3322b. The sliding portion 3322b is threadedly engaged with the screw rod 3321. The guide protrusion 333 and the limiting portion 3322a are arranged on opposite sides of the sliding portion 3322b. The mounting channel 4111 is arranged along the length direction of the pressing portion 411, and the mounting channel 4111 comprises a window 4112 penetrating in the direction perpendicular to the length direction of the pressing portion 411, i.e., the portion of the mounting channel 4111 penetrating through the length direction and the width direction of the pressing portion 411, and the limiting portion 3322a and the guide protrusion 333 are arranged on opposite sides of the pressing portion 411. The sliding portion 3322b can move in the window 4112 under the guidance of the screw rod 3321, and the limiting portion 3322a abuts against the pressing portion 411. The limiting portion 3322a abutting against the pressing portion 411 from the other side can prevent the tensioning sliding block 3322 from deviating or falling towards the direction of the crank 331.

[0065] With reference to Figure 3 , the screw rod 3321 exerts an upward force on the tensioning sliding block 3322, and the crank 331 exerts a force in the opposite direction on the tensioning sliding block 3322, so that the tensioning sliding block 3322 has a tendency to rotate, which may Figure 4 cause the deviation of the tensioning sliding block 3322. In an embodiment of the present application, the limiting portion 3322a is provided with a fixing hole 3322c, the pressing portion 411 is provided with a long hole 4113 along the length direction, and a fastener (not shown) passes through the long hole 4113 and the fixing hole 3322c in sequence. The fastener can be a flat head screw, and the long hole 4113 and the fixing hole 3322c are both two, the two long holes 4113 are symmetrically arranged on opposite sides of the window 4112, as shown in

[0066] As shown in Figure 3 , the number of fasteners is two. Figure 3The side where the shown crank 331 is located passes two fasteners through the long hole 4113 and the fixing hole 3322c of the corresponding limiting part 3322a in the first direction X-X. During the working process of the polishing device, the fasteners are not disassembled, and at the same time, the fasteners do not lock the limiting part 3322a and the pressing part 411, so that the tensioning slider 3322 can move flexibly on the lead screw 3321, preventing the slider from deviating or even falling off from this side of the limiting part 3322a.

[0067] In an embodiment, the limiting assembly further comprises an elastic mechanism 430, one end of the elastic mechanism 430 is fixed to the sliding platform 100, and the other end of the elastic mechanism 430 is fixed to the swing piece 410. The elastic mechanism 430 provides a pulling force to the swing piece 410 in the direction of approaching the wallboard 10. The elastic mechanism 430 can be selected as a tension spring, and the specification can be selected as a wire diameter of 1.2 and an outer diameter of 15 and a length of 60, to provide grinding pressure in the case of preventing overcutting.

[0068] Specifically, as shown in Figures 3 to 5 The two ends of the elastic mechanism 430 are respectively provided with a first fixing structure 431 and a second fixing structure 432, which facilitates the connection of the elastic mechanism 430 to the sliding platform 100 and the swing piece 410, so that it has connection feasibility under a certain assembly sequence. Among them, the first fixing structure 431 fixedly connects the swing piece 410 and one end of the tension spring of the elastic mechanism 430, and the second fixing structure 432 fixedly connects the sliding platform 100 and the other end of the tension spring of the elastic mechanism 430, so that the elastic mechanism 430 can move together with the sliding platform. The first fixing structure 431 and the second fixing structure 432 are both provided with a plurality of screw holes, and are further fixed by bolts. Considering the space layout, avoiding interference with other components and the stability of the connection, both are L-shaped and arranged in different directions, as shown in Figure 5

[0069] In the related art of manual handheld cutting machine for polishing operation, due to the weight of the cutting machine, long-time handheld cutting machine for polishing operation consumes a lot of physical strength of the worker, which further affects the polishing quality.

[0070] ​In an embodiment, the polishing device of the present application further comprises a base plate 700 and a magnetic member 710. The reciprocating driving assembly 500. The sliding platform 100 and the magnetic member 710 are arranged on the base plate 700. The magnetic member 710 has magnetism and can be adsorbed on the wall plate 10 made of metal material. The magnetic member 710 can be selected as a magnet or a negative pressure suction cup, and the number can be selected as four, which are respectively fixed at the four corners of the base plate 700. Especially when the wall plate 10 is in a vertical state, the metal protrusion 11 can have a certain distance from the ground and be located higher (0.5-3.0 m relative to the working platform). The polishing device of the present application can be adsorbed on the vertical wall plate 10 through the magnetic member 710 to realize the polishing work without manual holding at all times, thereby ensuring the stability and polishing effect of the polishing work.

[0071] In combination Figures 9 to 11 , the base plate 700 is in a C shape, and the reciprocating driving assembly 500 and the sliding platform 100 are arranged at the middle position of the base plate 700. The base plate 700 is also provided with lifting lugs 720 at the four corners to facilitate hoisting.

[0072] As shown in Figure 1 and Figure 2 , the polishing device of the present application further comprises a handle 730 and a protective cover 740. The handle 730 can improve the portability of the device and facilitate lifting; the protective cover 740 can prevent sparks from splashing out and protect the safety of the workers. The protective cover 740 is provided with a plurality of observation holes to facilitate the workers to observe the sparks.

[0073] It should be noted that in Figure 1 , the protective cover 740 further comprises a portion located on the side of the polishing execution assembly 200, which surrounds the polishing execution assembly 200 and other components. In order to facilitate the display of the polishing execution assembly 200 and other components inside the protective cover 740, Figure 1 and Figure 2 do not show this part of the protective cover 740.

[0074] The present application adopts a single-axis reciprocating polishing design. The width of the abrasive belt 230 (i.e. the width of the abrasive belt 230 in the first direction X-X) can be relatively large, which can be selected as 70 mm. In this way, a larger polishing width range can be covered, and all polishing positions can be covered at one time as much as possible, thereby avoiding repeated disassembly and movement of the device. In the case that the width of the abrasive belt 230 is sufficient, the action in the left-right direction (perpendicular to the polishing direction, i.e. the first direction X-X) can be avoided, thereby simplifying the design of the polishing device and eliminating the need for horizontal movement of the polishing wheel 210 in the first direction X-X. If the width of the abrasive belt 230 is larger, in order to cover a larger width and complete the polishing requirement within a specified time, the power of the polishing motor is required to be larger, thereby causing the polishing equipment to be heavier, and the portability and practicality will be greatly reduced.

[0075] If the grinding width is narrow, such as when grinding long straight welds, the width of the sanding belt 230 and the grinding wheel 210 can be appropriately reduced as long as they can cover the grinding range on the left and right (first direction XX).

[0076] like Figure 11 As shown, in one embodiment, the reciprocating drive assembly 500 includes a linear drive mechanism 510, a guide slider 520, and a guide rail 530. The guide rail 530 is disposed on the side of the linear drive mechanism 510 and parallel to the lead screw 513. Two guide sliders 520 are spaced apart on the guide rail 530 to enhance guiding stability. A slider shim 540 is fixed to each guide slider 520 to match the height of the sliding platform 100. The guide slider 520 is fixedly connected to the sliding platform 100 via the slider shim 540. The drive motor 511 can drive the lead screw 513 to rotate, thereby driving the lead screw nut 515 to move linearly along the second direction YY. Under the combined guiding action of the lead screw nut 515 and the guide slider 520, the sliding platform 100 can move linearly along the second direction YY.

[0077] The lead screw model can be selected as SUF1204-4, and the guide rail model can be selected as HIWIN's EGW15SA. Compared with the conventional MGW series rails, this model of guide rail has the characteristics of "low height + high rigidity / high load + mounting surface error absorption" to ensure the stability of high-speed operation.

[0078] In one embodiment, a bellows cover 810 and end baffles 820 are also provided on the base plate 700. The reciprocating drive assembly 500 is housed within the bellows cover 810, which is foldable or extendable in the second direction YY to accommodate the movement of the sliding platform 100. The end baffles 820 are connected to both ends of the bellows cover 810 for fixing the bellows cover 810.

[0079] like Figure 12 As shown, due to the height limitation of the drive motor, a recessed portion 701 is provided on the base plate 700 to accommodate the linear drive mechanism 510 and the guide rail 530, thereby reducing the overall height and weight of the machine body. The side of the guide rail 530 is positioned by a limiting step 702 to prevent the guide rail 530 from shifting left or right, thus achieving the function of positioning the guide rail 530.

[0080] The reciprocating motion of the linear drive mechanism can be controlled via a control module (such as an embedded PLC), thus enabling reciprocating grinding. The control box with the built-in control module and the protective cover 740 are integrated into a single structure, saving space and weight. The dust cover is equipped with a control switch and a current display screen 770.

[0081] Optionally, a 90° reduction box 750 is fixed on the sliding platform 100, and the bearing assembly 600 is fixed on the side of the reduction box 750. The reduction box 750 is connected with the driving member 240 and the driving shaft 221 to form a head. A sheet metal part 760 is used above the head to seal, facilitating oiling and maintenance.

[0082] The polishing device of the present application can be controlled by a mobile hand control box (not shown), and has the functions of head starting control, head advancing and retreating, and feed speed adjustment.

[0083] In the present application, the center distance of the driving wheel 220 and the polishing wheel 210 is constant, and in order to facilitate the replacement of the abrasive belt 230, the distance between the tensioning wheel 310 and the polishing wheel 210 is changed, so that the three-wheel tensioning abrasive belt 230 can be realized.

[0084] In the traditional manual polishing method or other polishing methods, the object of polishing observation is the metal protrusion 11. Since the polishing disc covers the polishing position during polishing, it is necessary to remove the polishing disc to observe or measure the remaining metal protrusion 11. Generally, the operation steps of the traditional manual polishing of such residual welds / metal protrusions 11 are as shown in Figure 13 .

[0085] In combination with the above-mentioned embodiments of the polishing device, the polishing method of the present application is applied to the polishing device described in the above-mentioned embodiments. As shown in Figure 13 , the polishing method comprises steps S100 to S500:

[0086] In step S100, the polishing device is moved, and the polishing device is arranged on the wall plate 10.

[0087] In step S200, the polishing wheel 210 of the polishing device is aligned with the metal protrusion 11 to be polished. Among them, S100 and S200 need to be completed manually.

[0088] In step S300, the polishing device is started, and the abrasive belt 230 is rotated to polish the metal protrusion 11.

[0089] In step S400, the amount of sparks generated by polishing is observed.

[0090] In step S500, it is determined whether the polishing work of the metal protrusion 11 is completed according to the amount of sparks.

[0091] According to steps S400 and S500, the object of observation in the polishing method of the present application is the spark. Due to the design of the height limit, when the spark is relatively large, it means that the abrasive belt 230 of the envelope polishing wheel 210 first contacts the metal protrusion 11, at which time the operation continues to polish. If there is no spark or the amount of spark is small, it is judged that the polishing is completed, and this process does not need to remove the polishing equipment to judge the completion.

[0092] The polishing device of the present application can be fixed on the wallboard 10 in an upright state, and the operator can accurately judge the state of the metal protrusion 11 in the polishing removal process by monitoring the size of the spark in real time (the supplementary method is to observe the size of the real-time current value). The polishing wheel 210 can automatically adjust the polishing intensity according to the height of the protrusion and the preset standard, effectively preventing damage to the base material. During the polishing process, the elastic mechanism 430 can play a buffering and shock-absorbing role, and the reciprocating driving assembly 500 can accurately control the reciprocating motion of the polishing wheel 210 along the protrusion point, ensuring uniform polishing. In addition, the tensioning assembly 300 of the present application is designed ingeniously, making the replacement operation of the abrasive belt 230 simple and fast, further improving the work efficiency and convenience. In summary, the present application not only improves the automation level of polishing work, but also significantly improves the polishing efficiency and safety, and is suitable for polishing requirements in various complex conditions.

[0093] The control module of the polishing device of the present application integrates a Hall sensor for detecting the current value of the polishing motor. When the abrasive belt 230 is effectively polishing, the current is large, and when the polishing is ineffective, the current value will return and stabilize at a small value. The operator can judge whether the polishing is completed by observing the size of the spark or the current value displayed on the current display screen 770. The current detection method is only a supplementary method for confirming the polishing state, and is not a necessary means.

[0094] The polishing device of the present application can be fixed on the wallboard 10 in an upright state, and the operator can accurately judge the state of the metal protrusion 11 in the polishing removal process by monitoring the size of the spark in real time (the supplementary method is to observe the size of the real-time current value). The polishing wheel 210 can automatically adjust the polishing intensity according to the height of the protrusion and the preset standard, effectively preventing damage to the base material. During the polishing process, the elastic mechanism 430 can play a buffering and shock-absorbing role, and the reciprocating driving assembly 500 can accurately control the reciprocating motion of the polishing wheel 210 along the protrusion point, ensuring uniform polishing. In addition, the tensioning assembly 300 of the present application is designed ingeniously, making the replacement operation of the abrasive belt 230 simple and fast, further improving the work efficiency and convenience. In summary, the present application not only improves the automation level of polishing work, but also significantly improves the polishing efficiency and safety, and is suitable for polishing requirements in various complex conditions.

[0095] As can be seen from the above embodiments, the polishing direction of the abrasive belt 230 is always parallel to the surface of the base material, unlike the traditional angle grinder which polishes at an inclined angle, avoiding damage to the base material and simplifying the operation steps of the construction personnel, reducing repeated observation and measurement work, and reducing the labor intensity of the construction personnel during polishing by using mechanical reciprocating polishing instead of manual reciprocating polishing.

[0096] The polishing device of the present application is a device specially used for polishing the metal protrusion 11 after the temporary accessory of the nuclear power steel containment is cut off. In a specific embodiment, the size of the metal protrusion 11 is 70x70mm rectangular range, and the thickness is 0~10mm. The overall weight of the polishing device of the present application is about 15kg, and the length, width and height dimensions are 500x260x230mm. After 120 polishing tests, it is found that the polishing time of the present application is 2~8min (determined according to the polishing metal thickness and the new and old degree of the abrasive belt 230). The edge position is smoothly polished after polishing, and the polishing depth into the base material is less than 0.25mm, which can meet the project construction use requirements.

[0097] Compared with the conventional manual angle grinder polishing method, the assembly / disassembly before and after polishing is slightly troublesome (magnetic attraction to the tank wall through a magnet), but it is one-key operation during polishing, and the polishing wheel 210 reciprocally rolls and polishes within the polishing range, and the operator only needs to observe the spark size (main judgment basis) and the polishing current size (supplementary judgment basis) from a distance, without moving the equipment or the polishing head to observe and measure whether the polishing position meets the requirements.

[0098] The polishing device of the present application simultaneously integrates polishing execution components, limiting components, tensioning components, reciprocating driving components, etc. in a smaller space, and the components are cross-laid to ensure that the base material is not damaged during polishing, and residual welds or other metal protrusions can be stably (i.e. the ceramic aluminum alloy abrasive belt is durable due to fast heat dissipation), quickly (i.e. the ceramic aluminum alloy abrasive belt can mill metal), and completely removed.

[0099] Although the present application is disclosed in the above preferred embodiments, it is not intended to limit the present application, and any person skilled in the art can make possible changes and modifications without departing from the spirit and scope of the present application. Therefore, any modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, which does not deviate from the technical solutions of the present application, falls within the protection scope defined by the claims of the present application.

Claims

1. A sharpening device characterized by, The application relates to a device for polishing metal protrusions on a wallboard, and the wallboard is a straight board. The polishing device comprises a sliding platform, a polishing execution assembly, a tensioning assembly, a limiting assembly and a reciprocating driving assembly. The polishing execution assembly comprises a polishing wheel, a driving wheel, a sand belt and a driving piece, the tensioning assembly comprises a tensioning wheel, the sand belt is transmissionally connected between the polishing wheel, the tensioning wheel and the driving wheel, and the driving piece is arranged on the sliding platform and connected with a driving rotating shaft of the driving wheel. The limiting assembly comprises a swing piece and a limiting wheel. The first end of the swing piece is connected with the polishing wheel and the limiting wheel, wherein the difference between the radius of the polishing wheel and the thickness of the sand belt is greater than or equal to zero and less than or equal to a preset wallboard recess depth. The second end of the swing piece is rotationally connected with the sliding platform through a bearing assembly, the bearing assembly and the driving rotating shaft are coaxial, and the bearing assembly and the driving rotating shaft have a gap therebetween. The polishing execution assembly further comprises a holder, the driving rotating shaft and a polishing rotating shaft of the polishing wheel are connected with the holder. The tensioning assembly further comprises an adjusting shaft and an adjusting piece, the adjusting piece is connected with the adjusting shaft, the adjusting shaft is connected with the holder, a tensioning rotating shaft of the tensioning wheel is fixed on the adjusting shaft, the adjusting piece can drive the adjusting shaft to rotate, thereby changing the distance between the tensioning wheel and the polishing wheel. The reciprocating driving assembly is connected with the sliding platform, so as to drive the sliding platform and the polishing execution assembly, the tensioning assembly and the limiting assembly to move reciprocally along a direction perpendicular to the polishing rotating shaft and parallel to the wallboard.

2. The sharpening device of claim 1, wherein The adjusting piece comprises a crank and a guide rod. The crank is fixedly connected with the adjusting shaft, and the crank is provided with a guide groove. The guide rod is provided with a guide protrusion, the guide protrusion is in contact with the guide groove and can slide in the guide groove. The guide protrusion is moved in the guide groove to drive the crank to rotate, thereby driving the adjusting shaft to rotate.

3. The sharpening device of claim 2, wherein The guide rod comprises a screw rod and a tensioning sliding block. The guide protrusion is arranged on the tensioning sliding block, and the tensioning sliding block is matched with the screw rod. The screw rod is configured to be operatively rotated to drive the tensioning sliding block to move along the screw rod.

4. The sharpening device of claim 3, wherein The guide rod further comprises a handle, and the handle is fixed to the end of the screw rod. The swing piece comprises a pressing part and a fixing block. The pressing part is provided with a mounting channel, the screw rod is accommodated in the mounting channel, and the handle is located outside the mounting channel. The screw rod has a concave recess, the fixing block has a groove, the recess of the screw rod is clamped in the groove of the fixing block, and the fixing block is fixed to the pressing part.

5. The sharpening device of claim 4, wherein, The tensioning sliding block comprises a limiting part and a sliding part. The sliding part is threadedly engaged with the screw rod. The guide protrusion and the limiting part are arranged on opposite sides of the sliding part. The mounting channel is arranged along the length direction of the pressing part, and the mounting channel comprises a window penetrating in the direction perpendicular to the length of the pressing part. The sliding part is movable under the guidance of the lead screw in the window, and the limiting part and the pressing part are in abutment.

6. The sharpening device of claim 5, wherein, The limiting part is provided with a fixing hole, and the pressing part is provided with a long hole along the length direction, and a fastener is sequentially threaded through the long hole and the fixing hole.

7. The sharpening device of claim 4, wherein, The first end of the polishing shaft is fixed on the holder; The second end of the polishing shaft is threaded through the second end of the pressing part and the limiting wheel; The polishing shaft is fixed on the pressing part, and the limiting wheel is rotatably threaded on the polishing shaft.

8. The sharpening device of any one of claims 1-7, wherein, The limiting assembly further comprises an elastic mechanism, one end of the elastic mechanism is fixed on the sliding platform, and the other end of the elastic mechanism is fixed on the swing piece; The elastic mechanism provides a pulling force to the swing piece in the direction of approaching the wallboard.

9. The sharpening device of any one of claims 1-7, wherein, The reciprocating driving assembly comprises a linear driving mechanism, a guide sliding block and a guide rail; The linear driving mechanism comprises a driving motor, a lead screw and a lead screw nut, the driving motor is connected to the lead screw, and the lead screw nut and the lead screw are matched to convert the rotary motion of the lead screw into linear motion; The guide sliding block is arranged on the guide rail and can slide along the guide rail, and the guide rail is arranged parallel to the lead screw; The lead screw nut and the guide sliding block are fixedly connected with the sliding platform; and / or The polishing device further comprises a bottom plate and a magnetic piece; The reciprocating driving assembly and the magnetic piece are arranged on the bottom plate; The magnetic piece has magnetism and can be adsorbed on the wallboard made of metal material.

10. A method of sharpening, characterized by, Applied to the polishing device as claimed in any one of claims 1-9; The polishing method comprises: Moving the polishing device to arrange the polishing device on the wallboard; Aligning the polishing wheel of the polishing device with the metal protrusion to be polished; Turning on the polishing device, and rotating the abrasive belt to polish the metal protrusion; Observing the amount of sparks generated by polishing; According to the amount of sparks, determining whether the polishing work of the metal protrusion is completed.

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