A grindstone machine for grinding concave and convex surfaces and its grindstone method

Abstract

The present invention discloses a grindstone machine for grinding concave and convex surfaces and a grindstone method thereof, belonging to the mechanical field. It includes a machine shell, a grinding disc, and a driving mechanism for controlling the rotation of the grinding disc. The grinding disc includes a grinding disc body in an inverted conical shape, and grinding blocks are evenly distributed on the lower surface of the grinding disc body. At least one water suction port and at least one water spray port are formed on the lower surface of the grinding disc body. The liquid sprayed from the water spray port contains diamond particles, and the concave and convex surfaces are impacted by the diamond particles in the water flow. When grinding the stone, place the grinding disc of the grindstone machine on the concave and convex surface, turn on the controller to control the rotation of the grinding disc, and control the operation of the suction fan and the water pump. The beneficial effects of the present invention are as follows: By setting a water spray port on the lower surface of the grinding disc body, the concave and convex surfaces are ground by the impact of diamond particles in the water, getting rid of the limitation on the area of the concave and convex surfaces, and it is very suitable for grinding with more and smaller concave and convex surfaces.

Description

[0001] This invention patent application is a divisional application of Chinese patent application No. 202010353402.5. The application number of the original application is 202010353402.5, and the application date is April 29, 2020. The name of the invention is a grinding wheel for grinding concave and convex surfaces and a grinding machine using the grinding wheel. Technical Field

[0002] The invention relates to the field of machinery, and in particular to a grinding machine for grinding concave and convex surfaces and a grinding method thereof. Background Art

[0003] Grinding machines are widely used in urban and rural ground facilities and have become a new favorite for ground decoration. However, the grinding discs of terrazzo machines in the prior art are usually only suitable for a single working ground. Some grinding machines can only grind flat ground, but not for grinding inclined planes and concave and convex planes; some are suitable for grinding inclined planes, but not for grinding straight planes and concave and convex planes; some are suitable for grinding concave and convex planes, but not for grinding inclined planes and straight planes. When encountering different working grounds, it is often necessary to select different models of grinding machines or different types of grinding discs and grinders to adapt to different grounds, which is very inconvenient to work, time-consuming and labor-intensive, and has low work efficiency.

[0004] In the prior art, grinding of concave and convex surfaces is generally done by adjusting the inclination angle of the grinding disc. For example, the invention patent application with publication number CN104325372A discloses a terrazzo machine with adjustable grinding disc position, including a housing, a bearing device and a control box arranged in the housing, a handrail arranged on the top of the housing, a running wheel arranged at the bottom of the housing, a motor fixedly arranged on the bearing device, a rotating shaft connected to the output shaft of the motor, a bearing seat sleeved on the rotating shaft, a grinding disc arranged at one end of the rotating shaft, and a grinding block fixedly arranged on the grinding disc. This type of grinding machine is only suitable for situations where the concave and convex surfaces are inclined or there are large and small concave and convex surfaces. For example, if the concave and convex surfaces are large and small, no matter how the grinding disc is tilted, the grinding block cannot contact the bottom of the concave surface at all, and the purpose of grinding the bottom of the concave surface and the top of the convex surface cannot be achieved. Summary of the invention

[0005] In view of the problems of poor adaptability and poor grinding effect of grinding concave and convex surfaces in the prior art, the present invention provides a grinding disc for grinding concave and convex surfaces and a grinding disc using the grinding disc. By arranging a water spray port on the lower surface of the grinding disc body, the concave and convex surface is ground by the impact of diamond particles in the water, thus getting rid of the restriction on the area of ​​the concave and convex surface, and being very suitable for grinding a large number of small concave and convex surfaces, as follows:

[0006] A grinding disc for grinding concave and convex surfaces, comprising a grinding disc body in an inverted conical shape and grinding blocks evenly distributed on the lower surface of the grinding disc body. At least one water suction port and at least one water spray port are further formed on the lower surface of the grinding disc body. An air suction duct for connecting the water suction port with a suction fan and a water spray duct for connecting the water spray port with a water pump are formed inside the grinding disc body.

[0007] Further, the grinding blocks are arranged on the lower surface of the grinding disc body from the inside to the outside into a first grinding ring, a second grinding ring and a third grinding ring, and the distance between adjacent two rings is equal; the distance between adjacent two grinding blocks in the same ring is equal.

[0008] Further, the water suction ports are evenly arranged along the circumferential direction on the outer side of the third grinding ring on the lower surface of the grinding disc body, and the water suction ports are evenly arranged along the circumferential direction between the first grinding ring and the second grinding ring.

[0009] Further, the water spray port is formed at the central position inside the first grinding ring, and the water spray ports are evenly arranged along the circumferential direction between the second grinding ring and the third grinding ring.

[0010] By arranging the water spray ports and the water suction ports between the first grinding ring, the second grinding ring and the third grinding ring to form three main water flow directions, it not only wets the grinding surface between the grinding blocks and the stone, facilitates the water circulation, but also at the third grinding

[0011] Further, a section of second thread-like protrusion is formed on the inner wall of the middle water pipe between the water spray port and the water pump, and the cross section of the second thread-like protrusion is rectangular.

[0012] Further, the water suction port is provided with a cylindrical section with the upper and lower ends communicating. The bottom surface of the cylindrical section is 0.3 - 0.8 cm higher than the bottom surface of the grinding block.

[0013] The present invention also provides a grinding stone machine for grinding concave and convex surfaces, adopting the above-mentioned grinding disc.

[0014] Further, the grinding stone machine further comprises a machine shell, a first water storage tank and a second water storage tank arranged on the machine shell, a suction fan connected with the water suction port, a water pump connected with the water spray port. The suction fan is connected with the inlet of the first water storage tank, the outlet of the first water storage tank is connected with the inlet of the water pump, the second water storage tank is connected with the inlet of the water pump, and diamond particles are evenly distributed in the second water storage tank.

[0015] Further, an adsorption device for adsorbing stone powder particles in water is formed between the first water storage tank and the suction fan. Through the design of the first water storage tank, the recycling of water and diamond particles sucked away from the water suction port is realized, and the consumption of water and diamond particles is greatly reduced.

[0016] Furthermore, the adsorption device is of a tubular structure, and a three-dimensional tubular adsorption layer for adsorbing stone powder particles in water is formed axially inside the tube. Pores for the passage of stone powder particles are formed in the three-dimensional tubular adsorption layer. The three-dimensional tubular adsorption layer is designed to be tubular and is filtered using a multi-layer composite filter cloth, which is specifically used to adsorb the fine particles ground from the stone, while retaining the larger-sized diamond particles and water, thus achieving the purpose of filtration.

[0017] Beneficial effects:

[0018] The beneficial effects produced by adopting the technical solution of the present invention are as follows:

[0019] (1) By providing a water spray port on the lower surface of the grinding disc body and using the impact of diamond particles in water to grind the concave-convex surface, the limitation on the area of the concave-convex surface is eliminated, and it is very suitable for grinding with many small concave-convex surfaces.

[0020] (2) Through the design of the first water storage tank, the recycling of water and diamond particles sucked away from the water suction port is realized, greatly reducing the consumption of water and diamond particles.

[0021] (3) The three-dimensional tubular adsorption layer is designed to be tubular and is filtered using a multi-layer composite filter cloth, which is specifically used to adsorb the fine particles ground from the stone, while retaining the larger-sized diamond particles and water, thus achieving the purpose of filtration.

[0022] (4) First threaded protrusions are evenly distributed along the length direction of the inner wall of the adsorption device, and a spiral long rod is provided on its central axis. When the water flow passes through the adsorption device, due to the change in pipe diameter and the guiding effect of the inner wall of the pipe, the flow of water between the inside and outside of the three-dimensional tubular adsorption layer is accelerated, thereby increasing the probability of contact between the fine particles and the three-dimensional tubular adsorption layer and improving the adsorption effect. Description of the drawings

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other relevant drawings can also be obtained based on these drawings.

[0024] Figure 1 It is a structural diagram of a grinding stone machine of the present invention in its preferred embodiment;

[0025] Figure 2 It is a schematic side sectional view of a grinding disc of the present invention in its preferred embodiment;

[0026] Figure 3 It is a structural diagram of the bottom of a grinding disc of the present invention in its preferred embodiment;

[0027] Figure 4 is a preferred water flow direction diagram of the present invention;

[0028] Figure 5 is a schematic cross-sectional view of a preferred adsorption device of the present invention;

[0029] Figure 6 is a preferred front view schematic diagram of the second adsorption device of the present invention;

[0030] Figure 7 is a preferred top view schematic diagram of the second adsorption device of the present invention;

[0031] Figure 8 is a structural diagram of a grindstone machine that can be used for corner grinding of the present invention;

[0032] Figure 9 is Figure 8 a schematic cross-sectional view of the side of the grinding disc in Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0034] As Figure 1 , 2 and shown in 4, a grindstone machine for grinding concave and convex surfaces includes a machine shell 1, a grinding disc 2, and a driving mechanism 3 for controlling the rotation of the grinding disc. The grinding disc 2 includes a grinding disc body in an inverted conical shape, and grinding blocks 21 are evenly distributed on the lower surface of the grinding disc body. At least one water suction port 22 and at least one water spray port 23 are formed on the lower surface of the grinding disc body. The water suction port 22 is connected to a suction fan 24 through a pipeline, and the water spray port 23 is connected to a water pump 25 through a pipeline.

[0035] See Figure 3 and Figure 4, a first water storage tank 11 and a second water storage tank 12 are also provided on the casing 1. The suction fan 24 is connected to the inlet of the first water storage tank 11, the outlet of the first water storage tank 11 is connected to the inlet of the water pump 25, the second water storage tank 12 is connected to the inlet of the water pump 25, and diamond particles are evenly distributed in the second water storage tank 12. Through the design of the first water storage tank, the recycling of water and diamond particles sucked away from the water suction port is realized, greatly reducing the consumption of water and diamond particles.

[0036] The grinding blocks 21 are arranged on the lower surface of the grinding disc body from the inside to the outside to form a first grinding ring 26, a second grinding ring 27 and a third grinding ring 28, and the distance between adjacent two rings is equal; the distance between adjacent two grinding blocks in the same ring is equal.

[0037] The water suction ports 22 are evenly arranged along the circumferential direction on the outer side of the third grinding ring 28 on the lower surface of the grinding disc body, and the water suction ports 22 are evenly arranged along the circumferential direction between the first grinding ring 26 and the second grinding ring 27.

[0038] The water spray ports 23 are formed at the central position inside the first grinding ring 26, and the water spray ports 23 are evenly arranged along the circumferential direction between the second grinding ring 27 and the third grinding ring 28. The grinding blocks are arranged into three grinding rings, and the water spray ports and water suction ports are arranged between the grinding rings, so that the space between the grinding rings can be fully utilized, and the water spray ports and water suction ports are also staggered, forming 3 main water flow directions in the grinding disc. Through the collision of the diamond particles in the water flow against the concave-convex surface, the purpose of grinding the concave-convex surface is achieved.

[0039] An adsorption device 13 for adsorbing stone powder particles in water is formed between the first water storage tank 11 and the suction fan 24.

[0040] See Figure 5 , the adsorption device 13 is a tubular structure, and a three-dimensional tubular adsorption layer 131 for adsorbing stone powder particles in water is axially formed in the tube. Pores for the stone powder particles to pass through are formed in the three-dimensional tubular adsorption layer 131.

[0041] The proportion of pores with a diameter less than 20 microns in the three-dimensional tubular adsorption layer 131 reaches more than 95%.

[0042] The three-dimensional tubular adsorption layer 131 is a multi-layer composite filter cloth mixed with PPS fibers, PTFE fibers and glass fibers.

[0043] The three-dimensional tubular adsorption layer 131 adopts a three-layer structure with a thickness of 0.8 - 1.5 cm. The middle layer is a woven base cloth woven from glass fibers, and the fineness of the glass fibers is 2.5 - 5.5 D and the length is 48 - 51 mm.

[0044] The middle layer of the three-dimensional tubular adsorption layer 131 uses a mixed needled fabric of PPS fibers and PTFE fibers on both sides, and the mixed weight ratio of PPS fibers and PTFE fibers is 68.4 wt%: 31.6 wt%.

[0045] The fineness of the PTFE fibers is 1.5 D and the length is 57 mm; the PPS fibers use two specifications of PPS fibers with a fineness of 1.3 D and a length of 48 mm and a fineness of 2.5 D and a length of 65 mm, and the mixed weight ratio is 2:1. After testing, the particle size of the fine particles ground from the stone is mainly distributed in the range of 10-20 microns, and the particles below 20 microns account for more than 80%. And what the three-dimensional tubular adsorption layer removes is exactly the fine particles below 20 microns. The three-dimensional tubular adsorption layer is designed into a tubular shape and uses a multi-layer composite filter cloth for filtration, specifically for adsorbing the fine particles ground from the stone, while retaining the larger diamond particles and water, achieving the purpose of filtration.

[0046] On the inner wall of the adsorption device 13, first spiral protrusions 132 are evenly distributed in the length direction, and the cross-section of the first spiral protrusions is triangular.

[0047] On the central axis of the adsorption device 13, a spiral long rod 133 is provided, and spiral protrusions 134 are evenly distributed on the outer circumference of the spiral long rod. The inner wall of the adsorption device is evenly distributed with first spiral protrusions in the length direction, and a spiral long rod is provided on its central axis, so that when the water flow passes through the adsorption device, due to the change in the pipe diameter and the guiding effect of the pipe inner wall, the water flow between the inside and outside of the three-dimensional tubular adsorption layer is accelerated, thereby increasing the probability of contact between the fine particles and the three-dimensional tubular adsorption layer and improving the adsorption effect.

[0048] Since the adsorption capacity of the three-dimensional tubular adsorption layer 131 for fine particles will be affected by time, it can also be changed into a one-way filtration layer here, that is, the fine particles directly pass through the three-dimensional tubular adsorption layer to reach the inside of the pipe, and a device for collecting the fine particles is provided inside the pipe.

[0049] See Figure 6 and 7 , the adsorption device 13 is of a tubular structure, and a three-dimensional tubular adsorption layer 131 for adsorbing stone powder particles in water is formed axially inside the pipe, and pores for the stone powder particles to pass through are formed inside the three-dimensional tubular adsorption layer 131.

[0050] The proportion of pores with a diameter less than 30 microns in the three-dimensional tubular adsorption layer 131 reaches more than 95%.

[0051] Inside the three-dimensional tubular adsorption layer 131, there is a cylindrical activated carbon adsorption block 135. At both ends of the adsorption device 13, there are particle removal cavities 136. The particle removal cavities 136 are provided with openings in the up and down directions, and the upper and lower openings are connected to a dust removal water pump (not shown in the figure). Its main function is to form a certain flow rate of water between the upper and lower openings, and take away particles from the cylindrical activated carbon adsorption block 135 in the particle removal cavity 136. One end center of the cylindrical activated carbon adsorption block 135 is fixedly installed on the movable end of the telescopic cylinder 137. Through the telescopic movement of the telescopic cylinder 137, the left and right ends of the cylindrical activated carbon adsorption block 135 are alternately located in the particle removal cavities 136 at its two ends, achieving the purpose of removing particles.

[0052] Below both ends of the adsorption device 13, there are provided a water inlet channel 138 and a water outlet channel 139 which are respectively connected to the first water storage tank 11 and the suction fan 24.

[0053] The main reason for not directly precipitating fine particles in the first water storage tank 11 is that the first water storage tank 11 not only contains fine particles but also diamond particles. If precipitation occurs, the recycling of diamond particles cannot be achieved, and it takes a long time to precipitate inside the first water storage tank 11, which will affect the water use efficiency. The design of the adsorption device 13 in this embodiment can better make up for this defect.

[0054] On the inner wall of the middle water pipe between the water spray nozzle 23 and the water pump 25, there is a section of second threaded protrusion 26, and the cross-section of the second threaded protrusion 26 is rectangular.

[0055] The driving mechanism 3 includes a driving motor 31, a first transmission wheel 32, a second transmission wheel 33 and a transmission belt 34. The driving motor 31 is fixedly installed on the upper surface of the machine shell 1. The center of the first transmission wheel 32 is installed on the rotating shaft of the driving motor 31. The transmission belt 34 is sleeved on the outer circumferences of the first transmission wheel and the second transmission wheel 33. The central axis of the grinding disc 2 is fixedly installed on the central axis of the second transmission wheel 33.

[0056] At the bottom of the machine shell 1, there are also moving wheels 14. On one side of the machine shell 1 away from the grinding disc 2, there is a handrail 15 installed, and on the handrail 15, there is a controller 16 for controlling the operation of the grinding disc 2.

[0057] During the daily floor grinding process, the grinding machine cannot grind the floor with a certain width below the corner. Based on the above problems, this embodiment has been further improved. By installing an enhanced grinding block assembly outside the grinding disc body, which is specifically used for grinding the floor below the corner, the adaptation range of the grinding disc for grinding the floor is effectively widened.

[0058] See Figure 8 and Figure 9, more than three enhanced grinding block assemblies 20 for grinding the ground within the outer circumference range of the grinding wheel body are evenly installed along the outer circumference direction of the grinding wheel body.

[0059] The enhanced grinding block assembly 20 includes an enhanced grinding block 201, a grinding block control cylinder 202, and a cylinder mounting seat 203. The enhanced grinding block 201 is installed on the movable end of the grinding block control cylinder 202, and the grinding block control cylinder 202 is installed on the outer circumference of the grinding wheel body through the cylinder mounting seat 203.

[0060] A fixed slider 204 is fixedly installed on the movable end of the grinding block control cylinder 202. A vertically arranged grinding block slide rail 205 is provided on the outer circumference of the grinding wheel body. The fixed slider 204 is installed on the grinding block slide rail 205 and can slide along the length direction of the grinding block slide rail 205.

[0061] A wall baffle 30 is provided above the enhanced grinding block 201 outside the machine housing 1. The wall baffle can not only protect the grinding wheel from external impacts such as walls, but also play a positioning role in the grinding of the enhanced grinding block.

[0062] A cylinder control switch 17 for controlling the lifting of the grinding block control cylinder 202 is also provided on the armrest 15.

[0063] The present invention also provides a method for grinding concave and convex surfaces. Using the above-mentioned grindstone machine, the specific steps are as follows:

[0064] Place the grinding wheel of the grindstone machine on the concave and convex surface, turn on the controller to control the rotation of the grinding wheel, and at the same time control the operation of the suction fan and the water pump;

[0065] Among them, the rotation speed of the grinding wheel is controlled at 60 - 100 revolutions per minute; the air pressure of the suction fan is controlled at 6000 Pa, and the water pressure of the water pump is 13.4 MPa;

[0066] And the particle size of the diamond particles is 1.5 - 3.0 mm, and the content of diamond particles in the liquid sprayed from the water spray port is 0.24 g / mL.

[0067] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A grindstone machine for grinding concave and convex surfaces, characterized in that, It includes a housing, a grinding disc, and a driving mechanism for controlling the rotation of the grinding disc. The grinding disc includes a grinding disc body in an inverted conical shape. The lower surface of the grinding disc body is evenly distributed with grinding blocks. At least one water suction port and at least one water spraying port are formed on the lower surface of the grinding disc body. The liquid sprayed from the water spraying port contains diamond particles, and the uneven surface is collided by the diamond particles in the water flow; the water suction port is connected to a suction fan through a pipeline, and the water spraying port is connected to a water pump through a pipeline; A first water storage tank and a second water storage tank are further provided on the housing. The suction fan is connected to the inlet of the first water storage tank. The outlet of the first water storage tank is connected to the inlet of the water pump. The second water storage tank is connected to the inlet of the water pump. Diamond particles are evenly distributed in the second water storage tank; The grinding blocks are arranged into a first grinding ring, a second grinding ring, and a third grinding ring from the inside to the outside on the lower surface of the grinding disc body, and the distance between adjacent two rings is equal; the distance between adjacent two grinding blocks in the same ring is equal; the water suction ports are evenly arranged along the circumferential direction on the outer side of the third grinding ring on the lower surface of the grinding disc body, and the water suction ports are evenly arranged along the circumferential direction between the first grinding ring and the second grinding ring; a water spraying port is formed at the central position inside the first grinding ring, and the water spraying ports are evenly arranged along the circumferential direction between the second grinding ring and the third grinding ring.

2. The grindstone machine for grinding concave and convex surfaces according to claim 1, characterized in that, An adsorption device for adsorbing stone powder particles in water is formed between the first water storage tank and the suction fan.

3. A grindstone machine for grinding concave and convex surfaces according to claim 1, characterized in that, The driving mechanism includes a driving motor, a first transmission wheel, a second transmission wheel, and a transmission belt. The driving motor is fixedly installed on the upper surface of the housing. The center of the first transmission wheel is installed on the rotating shaft of the driving motor. The transmission belt is sleeved on the outer circumferences of the first transmission wheel and the second transmission wheel. The central shaft of the grinding disc is fixedly installed on the central shaft of the second transmission wheel.

4. A grindstone machine for grinding concave and convex surfaces according to claim 1, characterized in that, Moving wheels are further provided at the bottom of the housing. A handrail is installed on one side of the housing away from the grinding disc. A controller for controlling the operation of the grinding disc is installed on the handrail.

5. A grinding method for a grinding stone machine for uneven surface grinding according to any one of claims 1-4, comprising the following steps: placing the grinding disc of the grinding stone machine on the uneven surface, turning on the controller to control the rotation of the grinding disc, and controlling the operation of the suction fan and the water pump; wherein the rotation speed of the grinding disc is controlled at 60-100 revolutions per minute; the air pressure of the suction fan is controlled at 6000 Pa, and the water pressure of the water pump is 13.4 MPa; and the particle size of the diamond particles is 1.5-3.0 mm, and the content of diamond particles in the liquid sprayed from the water spraying port is 0.24 g / mL.

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