An improved polishing wheel and its preparation method

Abstract

The invention relates to the technical field of polishing wheels, and in particular discloses an improved polishing wheel and a preparation method thereof, comprising a main shaft body and a polishing layer sintered on the outer side of the main shaft body; during the use of the polishing wheel, a driving motor is used to drive the main shaft body to rotate, so that an object to be polished outside contacts the polishing layer, and the rotating main shaft body drives the polishing layer to rotate, thereby realizing the polishing of the object; compared with a polishing wheel completely made of abrasives, the use amount of abrasives is reduced, and the manufacturing cost of the polishing wheel is reduced; by sintering the polishing layer on the outer side of the main shaft body, the adhesion between the polishing layer and the main shaft body is increased, and the polishing layer is prevented from falling off from the outer side of the main shaft body; the polishing wheel has good water solubility, wear resistance, fire safety, rust and corrosion resistance, and a long service life; its preparation method is easy to operate and control, has high production efficiency, low production cost, is suitable for large-scale industrial production, and makes the quality of the improved polishing wheel product stable.

Description

Technical Field

[0001] The invention relates to the technical field of polishing wheels, and in particular discloses an improved polishing wheel and a preparation method thereof. Background Art

[0002] After the workpiece is manufactured, it is often necessary to process the surface of the workpiece. For example, it is often necessary to polish the surface of the workpiece. The polishing wheel is one of the main components for polishing the workpiece. Most of the polishing wheels in the prior art adopt dry grinding, and the roller material contains curing agent and nylon fiber. The dust particles generated in the grinding process are all flammable. When the heat reaches a certain temperature during high-speed friction with metal, spontaneous combustion will occur. It is flammable. When the heat reaches a certain temperature during high-speed friction with metal, spontaneous combustion will occur. It will deform, expand, and become powdery in a water environment, and is not suitable for water grinding. On the other hand, most of the polishing wheels in the prior art have poor cutting and wear resistance, and a short service life, and need to be further improved. Summary of the invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide an improved polishing wheel, which is made of a main shaft body and a polishing layer sintered on the outside of the main shaft body. The polishing wheel has good water solubility, wear resistance, fire safety, rust and corrosion resistance, and a long service life. Compared with polishing wheels made entirely of abrasives, the use of abrasives is reduced, and the manufacturing cost of the polishing wheel is reduced.

[0004] Another object of the present invention is to provide a method for preparing an improved polishing wheel, which has easy operation and control, high production efficiency, low production cost, and is suitable for large-scale industrial production, so that the improved polishing wheel product has stable quality and long service life.

[0005] To achieve the above purpose, the present invention provides an improved polishing wheel, including a main shaft body and a polishing layer sintered on the outside of the main shaft body, the polishing layer is used to resist the external object to be polished, the rotating main shaft body drives the polishing layer to rotate, and the rotating polishing layer realizes the polishing of the object.

[0006] The main shaft body is made of stainless steel. Furthermore, the main shaft body is made of 304 stainless steel to improve the corrosion resistance and rust resistance of the polishing wheel.

[0007] Among them, the main shaft body includes a central part, two transition parts respectively arranged at both ends of the central part, two positioning parts respectively arranged at one end of the two transition parts away from each other, and a matching part arranged at one positioning part. The outer diameter of the transition part is larger than the outer diameter of the positioning part. The positioning part is used to carry external rolling bearings. The end surface of the transition part close to one end of the positioning part is used to stop the rolling bearing. The matching part is provided with a keyway, and the keyway is used to accommodate a strong body that cooperates with an external transmission wheel.

[0008] The cross section of the polishing layer is annular, and the polishing layer is sleeved on the outer side of the main shaft body.

[0009] The main shaft body is provided with a pit, and the polishing layer is provided with a fixing part protruding into the pit.

[0010] There are multiple pits, which are arranged around the central axis of the main shaft body.

[0011] The pit is extended along the length direction of the main shaft body, and is formed by being recessed on the outer surface of the main shaft body. The width of the pit at one end away from the central axis of the main shaft body is smaller than the width of the pit at one end close to the central axis of the main shaft body.

[0012] The polishing layer comprises the following raw materials in percentage by mass: 27-33% silicon carbide, 32-38% white corundum, 7-13% carbon fiber composite material, and 22-28% polymer resin material.

[0013] The polishing wheel of the present invention adopts the main shaft body and the polishing layer made of the above raw materials, and the improved polishing wheel prepared has the following advantages over the existing polishing wheels:

[0014] (1) Good water solubility, high-speed rotation and high-speed left-right movement without deformation in a water grinding environment, ensuring the accuracy of the cutting force during polishing; under effective polishing, the service life of similar products under polishing is extended. At the same time, the polishing wheels of similar products will deform, expand, and become powdery when exposed to water, and cannot be water-ground;

[0015] (2) Good wear resistance. The heating polishing layer of the improved polishing wheel of the present invention is made by combining silicon carbide and white corundum with other raw materials, so that the improved polishing wheel is suitable for processing hardened steel, alloy steel, high-speed steel, high-carbon steel and other materials with relatively hardness and high tensile strength. It has high-strength cutting and wear resistance, and its service life is about 24 months or more.

[0016] (3) Fire safety. The present invention combines carbon fiber composite materials with other materials to make the improved polishing wheel have good high temperature resistance, friction resistance and corrosion resistance. When water is added, it has cooling and safety effects. The polishing layer has a small thermal expansion coefficient, high specific heat capacity, can store a large amount of heat energy, low thermal conductivity, excellent resistance to heat and friction, and excellent thermal shock resistance (can withstand high temperatures of 2000°C).

[0017] (4) Anti-rust and corrosion, the spindle body is made of 304 stainless steel, which improves the corrosion resistance and anti-rust function of the polishing wheel.

[0018] Wherein, the polymer resin material is bisphenol A epoxy resin. Bisphenol A epoxy resin has good chemical corrosion resistance, mechanical strength and electrical insulation. The present invention improves the adhesion of the polishing layer to the spindle body and the chemical corrosion resistance, mechanical strength and electrical insulation of the polishing wheel by adding bisphenol A epoxy resin to the polishing layer material and matching it with other raw materials. The epoxy resin product has good physical and mechanical properties, chemical resistance and electrical insulation. Furthermore, the bisphenol A epoxy resin is bisphenol A epoxy resin E-20; the epoxy equivalent of the bisphenol A epoxy resin is 600-700 and the softening point is 75-85°C.

[0019] The carbon fiber composite material is steel bar conductive [A1], model YSFSTF-K300. PPS steel bar conductive has the properties of ultra-high rigidity, high hardness, mechanical strength, good dimensional stability, creep resistance, heat resistance (can be used in the temperature range of 180℃-230℃), wear resistance, good chemical corrosion resistance, low shrinkage, etc. It can be compounded with silicon carbide, white corundum and bisphenol A epoxy resin to improve the dimensional stability, mechanical strength and high temperature resistance, friction resistance and corrosion resistance of the polishing wheel.

[0020] The present invention also provides a method for preparing the improved polishing wheel, comprising the following steps:

[0021] (1) Weigh silicon carbide, white corundum, carbon fiber composite material, and polymer resin material in proportion, and mix them to form a mixture;

[0022] (2) After the mixture is mixed, water is added to moisten it and placed for 90-150 minutes to obtain a wet mixture; further, the mass ratio of the wet mixture to water is 2.5-3.5:1

[0023] (3) Place the wetted mixture into a mixer and stir evenly, and add water. The mass ratio of the wetted mixture to water is 2.5-3.5:1;

[0024] (4) Place the spindle body into the mold groove and pour the mixed material into the mold; place the fixed mold on the rolling sintering table;

[0025] (5) The mixed material attached to the surface of the spindle body is ignited and sintered by exhaust air to obtain a preliminary polishing wheel.

[0026] (6) Cooling the polishing wheel product by a ring cooler;

[0027] (7) Cool the initial polishing wheel for 23-25 ​​hours before surface cutting;

[0028] (8) The polishing wheel that has been cut is placed on a rolling grinder and ground to a specified size to obtain a polishing wheel.

[0029] The improved polishing wheel of the present invention is formed by high-temperature sintering of a central spindle body and a polishing layer attached to a peripheral polishing area. The spindle body and the polishing layer are sintered into one piece with the spindle body. The preparation method is convenient to operate and control, has high production efficiency, and low production cost. It is suitable for large-scale industrial production, so that the improved polishing wheel product has stable quality and long service life.

[0030] The beneficial effects of the present invention are as follows: during the use of the polishing wheel, a driving motor is used to drive the main shaft body to rotate, so that an external object to be polished contacts the polishing layer, and the rotating main shaft body drives the polishing layer to rotate, thereby realizing the polishing of the object; compared with a polishing wheel completely made of abrasives, the amount of abrasives used is reduced, and the manufacturing cost of the polishing wheel is reduced; by sintering the polishing layer on the outside of the main shaft body, the adhesion between the polishing layer and the main shaft body is increased, and the polishing layer is prevented from falling off from the outside of the main shaft body; the polishing wheel has good dimensional stability, wear resistance, fire safety, rust and corrosion resistance, long service life, and is suitable for water grinding polishing; its preparation method is easy to operate and control, high production efficiency, low production cost, suitable for large-scale industrial production, so that the quality of the obtained improved polishing wheel product is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is the front view of the present invention.

[0032] Figure 2 for Figure 1 Cross-sectional view along the A-A direction.

[0033] Figure 3 It is a cross-sectional view of the polishing layer of the present invention.

[0034] Figure 4 It is a cross-sectional view of the central part of the present invention.

[0035] Reference numerals include:

[0036] 1-spindle body 2-polishing layer 3-center part

[0037] 4—transition part 5—positioning part 6—matching part

[0038] 7—keyway 8—pit 9—fixing part. DETAILED DESCRIPTION

[0039] The present invention will be further described below in conjunction with the embodiments and drawings.

[0040] Example 1

[0041] See also Figure 1 and Figure 2As shown, an improved polishing wheel of the present invention includes a main shaft body 1 and a polishing layer 2 sintered on the outside of the main shaft body 1. The main body shape of the main shaft body 1 is a straight cylinder. The polishing layer 2 is used to resist the external object to be polished. The rotating main shaft body 1 drives the polishing layer 2 to rotate, and the rotating polishing layer 2 realizes the polishing of the object.

[0042] During the use of the polishing wheel, the main shaft body 1 is driven to rotate by a driving motor, so that the object to be polished outside contacts the polishing layer 2, and the rotating main shaft body 1 drives the polishing layer 2 to rotate, and the rotating polishing layer 2 then realizes the polishing of the object; compared with the polishing wheel made entirely of abrasives, the amount of abrasives used is reduced, and the manufacturing cost of the polishing wheel is reduced; by sintering the polishing layer 2 on the outside of the main shaft body 1, the adhesion between the polishing layer 2 and the main shaft body 1 is increased, and the polishing layer 2 is prevented from falling off from the outside of the main shaft body 1. When the polishing layer 2 is severely worn and the polishing wheel cannot be used, the polishing layer 2 can be re-sintered on the outside of the main shaft body 1 to realize the recycling of the main shaft body 1. Further, the polishing wheel is a polishing wheel specially used for water grinding.

[0043] In this embodiment, the spindle body 1 is made of stainless steel, preferably, the spindle body 1 is made of 304 stainless steel. When in use, the polishing wheel is used exclusively for water polishing, that is, in the process of polishing the object with the polishing wheel, water is used as a coolant and lubricant. At this time, the spindle body 1 made of stainless steel will not rust due to the use of water, thereby avoiding the poor polishing of the object due to the rust of the spindle body 1, and improving the polishing yield of the object.

[0044] The main shaft body 1 includes a central portion 3, two transition portions 4 respectively arranged at the left and right ends of the central portion 3, two positioning portions 5 respectively arranged at one end of the two transition portions 4 away from each other, and a matching portion 6 arranged at one positioning portion 5. The outer diameter of the transition portion 4 is larger than the outer diameter of the positioning portion 5. The positioning portion 5 is used to carry external rolling bearings. The end surface of the transition portion 4 close to one end of the positioning portion 5 is used to stop the rolling bearing. A keyway 7 is provided on the matching portion 6. The keyway 7 is recessed from the outer surface of the matching portion 6. The keyway 7 is used to accommodate a strong body that cooperates with an external transmission wheel.

[0045] The cross section of the polishing layer 2 is annular, and the polishing layer 2 is sleeved on the outer side of the main shaft body 1. Compared with the strip-shaped polishing layer 2 extending along the length direction of the main shaft body 1, it ensures that the polishing layer 2 of the rotating polishing wheel always contacts the object to be polished, thereby improving the polishing efficiency of the polishing wheel on the object.

[0046] See also Figures 1 to 4 As shown, a pit 8 is provided on the main shaft body 1, and the pit 8 is formed by a concave arrangement on the outer surface of the main shaft body 1. The polishing layer 2 is provided with a fixing portion 9 protruding into the pit 8. The inner pit wall of the pit 8 abuts against the fixing portion 9 to increase the adhesion between the main shaft body 1 and the polishing layer 2, thereby preventing the polishing layer 2 and the main shaft body 1 from rotating relative to each other and causing poor polishing.

[0047] There are multiple pits 8 , which are arranged around the central axis of the main shaft body 1 . The polishing layer 2 is provided with multiple fixing parts 9 extending into the multiple pits 8 , so as to further increase the adhesion between the main shaft body 1 and the polishing layer 2 .

[0048] The pit 8 is extended along the length direction of the main shaft body 1, and is formed by being concavely arranged on the outer surface of the main shaft body 1. The width of the pit 8 at one end away from the central axis of the main shaft body 1 is smaller than the width of the pit 8 at one end close to the central axis of the main shaft body 1. After the polishing layer 2 is sintered on the main shaft body 1, the shape of the pit 8 and the fixing part 9 is matched to prevent the fixing part 9 from being separated from the main shaft body 1 in the radial direction of the main shaft body 1, thereby further ensuring that the main shaft body 1 and the polishing layer 2 are firmly combined together.

[0049] In this embodiment, the polishing layer 2 includes the following raw materials in mass percentage: 30% silicon carbide, 35% white corundum, 10% carbon fiber composite material, and 25% polymer resin material. Further, the polymer resin material is bisphenol A type epoxy resin E-20. The carbon fiber composite material is PPS steel bar conductive, model YSFSTF-K300.

[0050] In this embodiment, the polishing layer 2 is made of mixed abrasives, and the mixed abrasives include the following components: 30% by mass, 35% by mass of white corundum abrasive, 10% by mass of carbon fiber composite material, and 25% by mass of polymer resin material.

[0051] The polishing wheel composed of the polishing layer 2 and the main shaft body 1 made of stainless steel of the present invention has the following advantages: (1) Water solubility. In a water grinding environment, it can rotate at high speed and move left and right at high speed without deformation, ensuring the accuracy of the cutting force during the polishing process. Under the same polishing conditions, the service life of the polishing wheel is extended, and the polishing wheel can be effectively prevented from being unable to be water-ground due to deformation, expansion, powdery state, etc. in a water environment. (2) Wear resistance. The silicon carbide and white corundum abrasives contained in the polishing layer 2 are suitable for processing hardened steel, alloy steel, high-speed steel, high-carbon steel and other materials with relatively hardness and high tensile strength. The polishing wheel has high-strength cutting performance and wear resistance, and its service life is about 24 months. (3) Fire safety. Most existing polishing wheels are dry-ground. The roller material in dry-ground contains curing agent and nylon fiber. The dust particles generated during the grinding process are flammable. When the heat reaches a certain temperature during high-speed friction with metal, spontaneous combustion will occur. The polishing wheel of this product contains carbon fiber material inside. The carbon fiber material is soft on the outside and hard on the inside, and is resistant to high temperature, friction, and corrosion. The addition of water has the safety effect of cooling and preventing combustion. (4) Anti-rust and corrosion. The spindle body 1 is made of 304 stainless steel to improve the corrosion resistance and anti-rust function of the polishing wheel.

[0052] This embodiment also provides a method for preparing the improved polishing wheel, comprising the following steps:

[0053] (1) Weigh silicon carbide, white corundum, carbon fiber composite material, and polymer resin material in proportion, and mix them to form a mixture;

[0054] (2) After the mixture is mixed evenly, water is added to moisten it and the mixture is allowed to stand for 120 minutes to obtain a wet mixture;

[0055] (3) Place the wetted mixture into a mixer and mix evenly, and add water. The mass ratio of the wetted mixture to water is 3:1.

[0056] (4) Place the spindle body 1 into the mold groove and pour the mixed material into the mold; place the fixed mold on the rolling sintering table;

[0057] (5) The mixed material attached to the surface of the spindle body 1 is ignited and sintered by exhaust air to obtain a preliminary polishing wheel.

[0058] (6) Cooling the polishing wheel product by a ring cooler;

[0059] (7) Cool the initial polishing wheel for 23-25 ​​hours before surface cutting;

[0060] (8) The polishing wheel that has been cut is placed on a rolling grinder and ground to a specified size to obtain a polishing wheel.

[0061] Example 2

[0062] In this embodiment, the polishing layer 2 includes the following raw materials in mass percentage: the polishing layer 2 includes the following raw materials in mass percentage: 27% silicon carbide, 38% white corundum, 7% carbon fiber composite material, and 28% polymer resin material.

[0063] Furthermore, the polymer resin material is bisphenol A epoxy resin E-20. The carbon fiber composite material is PPS steel bar conductive, model number is YSFSTF-K300.

[0064] This embodiment also provides a method for preparing the improved polishing wheel, comprising the following steps:

[0065] (1) Weigh silicon carbide, white corundum, carbon fiber composite material, and polymer resin material in proportion, and mix them to form a mixture;

[0066] (2) After the mixture is mixed evenly, water is added to moisten it and the mixture is allowed to stand for 90 minutes to obtain a wet mixture;

[0067] (3) Place the wetted mixture into a mixer and mix evenly, and add water. The mass ratio of the wetted mixture to water is 2.5:1.

[0068] (4) Place the spindle body 1 into the mold groove and pour the mixed material into the mold; place the fixed mold on the rolling sintering table;

[0069] (5) The mixed material attached to the surface of the spindle body 1 is ignited and sintered by exhaust air to obtain a preliminary polishing wheel.

[0070] (6) Cooling the polishing wheel product by a ring cooler;

[0071] (7) Cool the initial polishing wheel for 23 hours before surface cutting;

[0072] (8) The polishing wheel that has been cut is placed on a rolling grinder and ground to a specified size to obtain a polishing wheel.

[0073] The rest of the contents of this embodiment are the same as those of Embodiment 1 and will not be described again here.

[0074] Example 3

[0075] In this embodiment, the polishing layer 2 includes the following raw materials in mass percentage: 33% silicon carbide, 32% white corundum, 13% carbon fiber composite material, and 22% polymer resin material. Furthermore, the bisphenol A epoxy resin is bisphenol A epoxy resin E-20. The carbon fiber composite material is PPS steel drill guide YSFSTF-K300.

[0076] This embodiment also provides a method for preparing the improved polishing wheel, comprising the following steps:

[0077] (1) Weigh silicon carbide, white corundum, carbon fiber composite material, and polymer resin material in proportion, and mix them to form a mixture;

[0078] (2) After the mixture is mixed evenly, water is added to moisten it and the mixture is allowed to stand for 150 minutes to obtain a wet mixture;

[0079] (3) Place the wetted mixture into a mixer and mix evenly, and add water. The mass ratio of the wetted mixture to water is 3.5:1.

[0080] (4) Place the spindle body 1 into the mold groove and pour the mixed material into the mold; place the fixed mold on the rolling sintering table;

[0081] (5) The mixed material attached to the surface of the spindle body 1 is ignited and sintered by exhaust air to obtain a preliminary polishing wheel.

[0082] (6) Cooling the polishing wheel product by a ring cooler;

[0083] (7) Cool the initial polishing wheel for 25 hours before surface cutting;

[0084] (8) The polishing wheel that has been cut is placed on a rolling grinder and ground to a specified size to obtain a polishing wheel.

[0085] The rest of the contents of this embodiment are the same as those of Embodiment 1 and will not be described again here.

[0086] Example 4

[0087] In this embodiment, the polishing layer 2 includes the following raw materials in mass percentage: 34% silicon carbide, 32% white corundum, 14% carbon fiber composite material, and 21% polymer resin material. Further, the polymer resin material is bisphenol A type epoxy resin E-20. The carbon fiber composite material is PPS steel drill guide YSFSTF-K300.

[0088] The rest of the contents of this embodiment are the same as those of Embodiment 1 and will not be described again here.

[0089] The performance tests of the improved water-mill special polishing wheels of Examples 1-4 of the present invention are as follows:

[0090] Hardness measurement: Use a hardness tester to test the surface hardness of the product. Within the 360-degree range of the wheel, test 4 points every 50MM. The hardness range is HRC75-80.

[0091] Dimensional stability: (1) Measure the external dimensions of the sintered part of the product; (2) Soak the product in clean water for 24 hours and then measure its external dimensions; (3) Dry the product in an oven at 300 degrees Celsius and measure it after cooling; (4) Measure the product in these three states to test its water solubility and deformation. The external dimensions should be within 0.02MM.

[0092] Dynamic balance test: Perform dynamic balance test, the balance degree is within 0.02-0.5MM.

[0093] Machinability test: It has high-strength machinability and can grind steel plates with a hardness of HR48.

[0094] Wear resistance test: After grinding the steel plate with hardness of HR48, the thickness of the polishing wheel lost in 24 hours is less than 0.01MM.

[0095] High temperature resistance test: can withstand high temperature of 2000℃.

[0096] The above contents are only preferred embodiments of the present invention, and the contents of this specification should not be understood as limiting the present invention.

Claims

1. An improved polishing wheel, characterized in that: It includes a main shaft body and a polishing layer sintered on the outside of the main shaft body, the polishing layer is used to resist the external object to be polished, the rotating main shaft body drives the polishing layer to rotate, and the rotating polishing layer realizes the polishing of the object; the polishing layer includes the following raw materials in mass percentage: 27-33% silicon carbide, 32-38% white corundum, 7-13% carbon fiber composite material, and 22-28% polymer resin material; The preparation method of the improved polishing wheel comprises the following steps: (1) Weigh silicon carbide, white corundum, carbon fiber composite material, and polymer resin material in proportion, and mix them to form a mixed material; (2) After the mixture is mixed, water is added to moisten it and allowed to stand for 90-150 minutes to obtain a wet mixture; (3) putting the wetted mixture into a mixer and stirring evenly, and adding water, the mass ratio of the wetted mixture to water is 2.5-3.5:1; (4) Place the spindle body into the mold groove and pour the mixed material into the mold; place the fixed mold on the rolling sintering table; (5) igniting and sintering the mixed material attached to the surface of the spindle body to obtain a preliminary polishing wheel; (6) Cooling the polishing wheel product by a ring cooler; (7) Cooling the initial polishing wheel for 23-25 ​​hours before surface cutting; (8) The polishing wheel that has been cut is placed on a rolling grinder and ground to a specified size to obtain a polishing wheel.

2. The improved polishing wheel according to claim 1, characterized in that: The spindle body is made of stainless steel.

3. The improved polishing wheel according to claim 1, characterized in that: The main shaft body includes a central part, two transition parts respectively arranged at both ends of the central part, two positioning parts respectively arranged at one end of the two transition parts away from each other, and a matching part arranged at one positioning part. The outer diameter of the transition part is larger than the outer diameter of the positioning part. The positioning part is used to carry external rolling bearings. The end surface of the transition part close to one end of the positioning part is used to stop the rolling bearing. The matching part is provided with a keyway, and the keyway is used to accommodate a key body that cooperates with an external transmission wheel.

4. The improved polishing wheel according to claim 1, characterized in that: The cross section of the polishing layer is annular, and the polishing layer is sleeved on the outer side of the main shaft body.

5. The improved polishing wheel according to claim 4, characterized in that: The main shaft body is provided with a pit, and the polishing layer is provided with a fixing part protruding into the pit.

6. The improved polishing wheel according to claim 5, characterized in that: There are multiple pits, and the multiple pits are arranged around the central axis of the main shaft body.

7. The improved polishing wheel according to claim 5, characterized in that: The pit is extended along the length direction of the main shaft body, and is formed by being recessed on the outer surface of the main shaft body. The width of the pit at one end away from the central axis of the main shaft body is smaller than the width of the pit at one end close to the central axis of the main shaft body.

8. The improved polishing wheel according to claim 1, characterized in that: The polymer resin material is bisphenol A epoxy resin.

Images