CN109277956B - High-speed grinding wheel for handheld engine large-diameter cutting machine and production process - Google Patents
High-speed grinding wheel for handheld engine large-diameter cutting machine and production process Download PDFInfo
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- CN109277956B CN109277956B CN201811332376.7A CN201811332376A CN109277956B CN 109277956 B CN109277956 B CN 109277956B CN 201811332376 A CN201811332376 A CN 201811332376A CN 109277956 B CN109277956 B CN 109277956B
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- glass fiber
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- grinding wheel
- mesh cloth
- fiber mesh
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- 238000000227 grinding Methods 0.000 title claims abstract description 57
- 238000005520 cutting process Methods 0.000 title claims abstract description 38
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 239000004744 fabric Substances 0.000 claims abstract description 55
- 239000000463 material Substances 0.000 claims abstract description 55
- 239000003365 glass fiber Substances 0.000 claims abstract description 50
- 239000004576 sand Substances 0.000 claims abstract description 39
- 238000003756 stirring Methods 0.000 claims abstract description 18
- 238000003892 spreading Methods 0.000 claims abstract description 16
- 239000003607 modifier Substances 0.000 claims abstract description 11
- 239000000945 filler Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 7
- 229920000459 Nitrile rubber Polymers 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims abstract description 6
- 229910001651 emery Inorganic materials 0.000 claims description 9
- 239000011268 mixed slurry Substances 0.000 claims description 9
- 238000002156 mixing Methods 0.000 claims description 9
- 239000002994 raw material Substances 0.000 claims description 9
- 239000007767 bonding agent Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 7
- 238000000465 moulding Methods 0.000 claims description 4
- 238000000748 compression moulding Methods 0.000 claims description 3
- 238000004806 packaging method and process Methods 0.000 claims 1
- 239000011230 binding agent Substances 0.000 abstract description 7
- 239000003082 abrasive agent Substances 0.000 abstract description 2
- 239000011347 resin Substances 0.000 description 12
- 229920005989 resin Polymers 0.000 description 12
- 229910000831 Steel Inorganic materials 0.000 description 3
- 229910052593 corundum Inorganic materials 0.000 description 3
- 239000010431 corundum Substances 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 229910000975 Carbon steel Inorganic materials 0.000 description 2
- 239000010962 carbon steel Substances 0.000 description 2
- 230000002860 competitive effect Effects 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- 238000000265 homogenisation Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 206010035148 Plague Diseases 0.000 description 1
- 241000607479 Yersinia pestis Species 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
- B24D7/14—Zonally-graded wheels; Composite wheels comprising different abrasives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
- B24D18/0009—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for using moulds or presses
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
The invention discloses a high-speed grinding wheel for a large-diameter cutting machine of a handheld engine and a production process thereof, wherein the grinding wheel consists of two layers of sand materials and three layers of glass fiber mesh cloth, and the sand materials are prepared from SA abrasive materials, L-C binding agents, BH active fillers and modifier nitrile rubber powder; the grinding wheel is produced by adopting secondary stirring, the primary stirring is carried out and then is stored for 64 hours, the secondary stirring is carried out and is stored for 24 hours, firstly, the secondary stirring can lead the sand in the grinding wheel to be more uniformly distributed, and secondly, the secondary stirring is respectively stored for 64/24 hours, so that the components in the grinding wheel are more completely reacted; the method comprises the steps of firstly pre-placing a glass fiber mesh cloth, firstly spreading 40% of materials, then placing an intermediate glass fiber mesh cloth, spreading 60% of materials, and then placing a glass fiber mesh cloth; the invention increases the integral strength of the grinding wheel, increases the softness of the binding agent and reduces the integral brittleness of the grinding wheel, thereby enabling the maximum rotating speed of the grinding wheel to reach 100m/s.
Description
Technical Field
The invention relates to the technical field of high-speed grinding wheels for cutting machines, in particular to a high-speed grinding wheel for a handheld engine large-diameter cutting machine and a production process thereof.
Background
The annual output of the resin cutting grinding wheel in China is about 40 ten thousand tons according to statistics. At present, the domestic products have serious homogenization phenomenon, the problem of low price competitive marketing is increasingly highlighted, and the product profit is lower. Where resin flake grinding wheels develop is a major problem that plagues manufacturers. At present, the domestic resin sheet cutting grinding wheel mainly has the following problems:
(1) The bonding strength is low. At present, the domestic resin flake grinding wheel has large yield, but the product quality has larger gap compared with the foreign similar products. The method is particularly characterized in that the bonding strength is low, so that the product can only be used at a low linear speed of 70-80 m/s, the requirement of high-efficiency cutting is difficult to adapt, and the abrasive cutting wheel with the linear speed of 100-120 m/s is difficult to manufacture.
(2) The abrasion is fast, and some resin abrasive cut wheels only have about 1/4-l/2 of the foreign products.
(3) The variety of the binding agent is single.
(4) The bonding agent has low heat resistance and can not meet the cutting processing requirement under the high temperature condition in the current market.
(5) The product has no difference in application and strong pertinence, and is difficult to meet the processing requirements of various materials in the market.
As one of the most common and largest varieties of resin sheet grinding wheels, the use and the wide range thereof are also complicated and varied. Such as hardness, brittleness, chemical compatibility with the abrasive, and the like of the material being cut. The different applications have a great difference in the performance requirements of the grinding wheels. Cutting common steel materials is very different from cutting stainless steel or nonferrous metals, cutting metallic materials and nonmetallic materials, cutting hard and brittle materials and cutting flexible materials, etc.
In China, most resin sheet cutting grinding wheel production enterprises have old and lagged production equipment, the quantity of production formulas is extremely limited, the product formulas of many enterprises continue to be used for many years, the product varieties are single, and only sheet grinding wheels for cutting common carbon steel can be produced. These are the main reasons for serious product homogenization and increasingly low price competitive problems, and the product profits are lower and lower.
Resin sheet cutting wheels for cutting common carbon steel are widely seen in the domestic market. Although the cutting amount of common steel is the largest, along with the development of national economy, the amount of various alloy materials such as stainless steel, nonferrous metal materials and nonmetallic materials also tends to increase rapidly, and the cutting amount provides huge market space for resin sheet cutting grinding wheels. At present, a special resin sheet grinding wheel for cutting steel rail materials is available on the domestic market, but no special resin cutting grinding wheel for cutting materials such as stainless steel, nonferrous metals and the like is developed by enterprises.
At present, the rotating speed of the resin grinding wheel can reach 80m/s at most, but the rotating speed of the high-speed grinding wheel for the handheld engine large-diameter cutting machine needs to reach 100m/s and can ensure that the grinding wheel meets the cutting requirements of two materials, namely metal and stone, so that development of the high-speed grinding wheel for the handheld engine large-diameter cutting machine is needed.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a high-speed grinding wheel for a large-diameter cutting machine of a handheld engine and a production process.
In order to achieve the above purpose, the invention is implemented according to the following technical scheme:
the utility model provides a high-speed emery wheel for hand-held type engine major diameter cutting machine, includes the emery wheel body, and emery wheel body center is equipped with the mounting hole, the emery wheel body comprises lower floor's glass fiber net cloth, first layer sand material, middle level glass fiber net cloth, second floor sand material, the upper strata glass fiber net cloth that from bottom to top distributes, first layer sand material and second floor sand material are made by the following raw materials of weight percent: 78% of SA abrasive, 13% of L-C bonding agent, 7% of BH active filler and 2% of modifier.
Further, the modifier is nitrile rubber powder.
In addition, the invention also provides a high-speed grinding wheel production process for the handheld engine large-diameter cutting machine, which sequentially comprises mixing, forming and curing, wherein,
the specific steps of the mixing material are as follows: the following raw materials in percentage by weight are taken: 78% of SA abrasive, 13% of L-C bonding agent, 7% of BH active filler and 2% of modifier are mixed, and the temperature of the mixed raw materials is adjusted: 15-25 ℃ and humidity 40-60%; then stirring for the first time, and storing for 64 hours; then carrying out secondary material mixing, and storing for 24 hours to obtain mixed slurry;
the specific steps of the molding are as follows: pre-laying a lower layer of glass fiber mesh cloth in a forming die, spreading a first layer of sand material on the lower layer of glass fiber mesh cloth, spreading a middle layer of glass fiber mesh cloth on the first layer of sand material, spreading a second layer of sand material on the middle layer of glass fiber mesh cloth, and finally spreading an upper layer of glass fiber mesh cloth on the second layer of sand material for compression molding.
Further, the amount of the first layer of sand is 40% of the total mixed slurry weight, and the amount of the second layer of sand is 60% of the total mixed slurry weight.
Because the mesh cloth is rolled into a bundle for storage, the edge of the mesh cloth after cutting is not quite smooth, the edge warping condition can occur, the edge of the mesh cloth can be leaked during discharging, the problem of shortage of materials can occur at the edge of the grinding wheel manufactured and molded by the process, and therefore, a heating lamp for heating the lower layer glass fiber mesh cloth, the middle layer glass fiber mesh cloth and the upper layer glass fiber mesh cloth is arranged beside a molding die, so that the glass fiber mesh cloth is smoother.
Compared with the prior art, the grinding wheel is composed of two layers of sand materials and three layers of glass fiber mesh cloth, wherein the sand materials are made of SA abrasive materials, L-C binding agents, BH active fillers and modifier nitrile rubber powder; the grinding wheel is produced by adopting secondary stirring, the primary stirring is carried out and then is stored for 64 hours, the secondary stirring is carried out and is stored for 24 hours, firstly, the secondary stirring can lead the sand in the grinding wheel to be more uniformly distributed, and secondly, the secondary stirring is respectively stored for 64/24 hours, so that the components in the grinding wheel are more completely reacted; the method comprises the steps of firstly pre-placing a glass fiber mesh cloth, firstly spreading 40% of materials, then placing an intermediate glass fiber mesh cloth, spreading 60% of materials, and then placing a glass fiber mesh cloth, and heating the glass fiber mesh cloth when placing the glass fiber mesh cloth, so that the glass fiber mesh cloth is smoother, the situation that the edge of the glass fiber mesh cloth is tilted is prevented, and further the problem that the edge of a grinding wheel is lacked in materials is prevented; the invention increases the integral strength of the grinding wheel, increases the softness of the binding agent and reduces the integral brittleness of the grinding wheel, thereby enabling the maximum rotating speed of the grinding wheel to reach 100m/s.
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
Fig. 2 is a flow chart of the production process of the present invention.
Detailed Description
The present invention will be further described in detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. The specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
As shown in fig. 1, this embodiment provides a high-speed grinding wheel for a handheld engine major diameter cutting machine, including grinding wheel body 1, grinding wheel body 1 center is equipped with mounting hole 101, grinding wheel body 1 comprises lower floor's glass fiber net cloth 2, first layer sand material 3, middle level glass fiber net cloth 5, second layer sand material 4, upper glass fiber net cloth 6 that from bottom to top distributes, first layer sand material 3 and second layer sand material 4 are made by the raw materials of following weight percent: 78% of SA abrasive, 13% of L-C bonding agent, 7% of BH active filler and 2% of modifier. The grinding wheel body 1 of the embodiment is composed of a lower layer glass fiber mesh cloth 2, a first layer sand material 3, a middle layer glass fiber mesh cloth 5, a second layer sand material 4 and an upper layer glass fiber mesh cloth 6, and the overall strength of the grinding wheel body 1 is improved.
In this embodiment, the modifier is a nitrile rubber powder. SA is a single-crystal corundum abrasive, and compared with A (brown corundum abrasive) and WA (white corundum abrasive), the SA has higher hardness and toughness, is in a single-particle spherical crystal and has stronger crushing resistance. However, the higher the hardness of the abrasive, the higher the brittleness of the abrasive is, and the breakage and chipping of the grinding wheel are likely to occur during high-speed cutting, and in order to make the grinding wheel of the embodiment reach the requirement of the highest rotating speed of 100m/s, 2% of modifier, namely nitrile rubber powder, is added, so that the softness of the binding agent is improved, and the whole brittleness of the grinding wheel is reduced.
In addition, the embodiment also provides a high-speed grinding wheel production process for the handheld engine large-diameter cutting machine, which comprises the steps of mixing, forming and solidifying in sequence as shown in figure 2, wherein,
the specific steps of the mixing material are as follows: the following raw materials in percentage by weight are taken: 78% of SA abrasive, 13% of L-C bonding agent, 7% of BH active filler and 2% of modifier are mixed, and the temperature of the mixed raw materials is adjusted: 15-25 ℃ and humidity 40-60%; then stirring for the first time, and storing for 64 hours; then carrying out secondary material mixing, and storing for 24 hours to obtain mixed slurry;
in the embodiment, the secondary stirring is adopted, the primary stirring is stored for 64 hours, the secondary stirring is stored for 24 hours, firstly, the secondary stirring can enable sand in the grinding wheel to be distributed more uniformly, and secondly, the secondary stirring is respectively stored for 64/24 hours, so that components in the grinding wheel react more completely.
The specific steps of the molding are as follows: the method comprises the steps of pre-laying a layer of glass fiber mesh cloth in a forming die, spreading a first layer of sand material on the lower layer of glass fiber mesh cloth, spreading a middle layer of glass fiber mesh cloth on the first layer of sand material, spreading a second layer of sand material on the middle layer of glass fiber mesh cloth, spreading an upper layer of glass fiber mesh cloth on the second layer of sand material, wherein the amount of the first layer of sand material is 40% of the total mixed slurry weight, the amount of the second layer of sand material is 60% of the total mixed slurry weight, and finally performing compression molding.
In addition, in this embodiment, because the screen cloth is rolled into a bundle and is deposited, the circumstances that the edge of the screen cloth after cutting is not very level and can appear the edge wane, the problem that leaks material can appear in the edge when making the blowing, and the problem that lacks material often appears in the emery wheel edge of this kind of technology preparation fashioned emery wheel, consequently, be provided with the heating lamp that is used for carrying out heating to lower floor's glass fiber net cloth, middle floor's glass fiber net cloth, upper glass fiber net cloth next door of forming die, make glass fiber net cloth more level.
In summary, the invention increases the overall strength of the grinding wheel, increases the softness of the binding agent and reduces the overall brittleness of the grinding wheel, thereby enabling the maximum rotating speed of the grinding wheel of the invention to reach 100m/s.
The technical scheme of the invention is not limited to the specific embodiment, and all technical modifications made according to the technical scheme of the invention fall within the protection scope of the invention.
Claims (3)
1. The utility model provides a high-speed emery wheel for hand-held type engine major diameter cutting machine, includes the emery wheel body, and emery wheel body center is equipped with mounting hole, its characterized in that: the grinding wheel body consists of a lower layer glass fiber mesh cloth, a first layer sand material, a middle layer glass fiber mesh cloth, a second layer sand material and an upper layer glass fiber mesh cloth which are distributed from bottom to top, wherein the first layer sand material and the second layer sand material are prepared from the following raw materials in percentage by weight: 78% of SA abrasive, 13% of L-C bonding agent, 7% of BH active filler and 2% of modifier nitrile rubber powder;
the production process of the high-speed grinding wheel for the handheld engine large-diameter cutting machine sequentially comprises the following steps of mixing, forming, solidifying and packaging a finished product, wherein the specific steps of mixing are as follows: the following raw materials in percentage by weight are taken: 78% of SA abrasive, 13% of L-C bonding agent, 7% of BH active filler and 2% of modifier are mixed, and the temperature of the mixed raw materials is adjusted: 15-25 ℃ and humidity 40-60%; then stirring for the first time, and storing for 64 hours; then carrying out secondary material mixing, and storing for 24 hours to obtain mixed slurry;
the specific steps of the molding are as follows: pre-laying a lower layer of glass fiber mesh cloth in a forming die, spreading a first layer of sand material on the lower layer of glass fiber mesh cloth, spreading a middle layer of glass fiber mesh cloth on the first layer of sand material, spreading a second layer of sand material on the middle layer of glass fiber mesh cloth, and finally spreading an upper layer of glass fiber mesh cloth on the second layer of sand material for compression molding.
2. The process for producing a high-speed grinding wheel for a large-diameter handheld engine cutter according to claim 1, wherein: the amount of the first layer of sand is 40% of the total mixed slurry weight, and the amount of the second layer of sand is 60% of the total mixed slurry weight.
3. The process for producing a high-speed grinding wheel for a large-diameter handheld engine cutter according to claim 1, wherein: and a heating lamp for heating the lower layer glass fiber mesh cloth, the middle layer glass fiber mesh cloth and the upper layer glass fiber mesh cloth is arranged beside the forming die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811332376.7A CN109277956B (en) | 2018-11-09 | 2018-11-09 | High-speed grinding wheel for handheld engine large-diameter cutting machine and production process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811332376.7A CN109277956B (en) | 2018-11-09 | 2018-11-09 | High-speed grinding wheel for handheld engine large-diameter cutting machine and production process |
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| CN109277956A CN109277956A (en) | 2019-01-29 |
| CN109277956B true CN109277956B (en) | 2024-01-05 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110480531B (en) * | 2019-08-12 | 2024-09-03 | 郑州市弘毅机械有限公司 | Small-diameter glass fiber mesh sorting and conveying device |
| CN114147633A (en) * | 2021-12-03 | 2022-03-08 | 金华市国泰砂轮研磨有限公司 | Preparation process of high-speed grinding wheel with ceramic corundum resin binder |
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| CN109277956A (en) | 2019-01-29 |
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