CN116197829A - Abrasive wheel for water drill processing and preparation method thereof - Google Patents

Abstract

The invention discloses a water drill processing grinding wheel and a preparation method thereof, and belongs to the technical field of water drill processing. The grinding wheel comprises a cylindrical carbon steel grinding wheel matrix and a plurality of grinding material sleeves outside the carbon steel grinding wheel matrix, wherein the grinding material sleeves are arranged side by side in the axial direction of the carbon steel grinding wheel matrix and are coaxial with the carbon steel grinding wheel matrix, and the grinding material sleeves are bonded on the carbon steel grinding wheel matrix through epoxy resin; the length of the abrasive sleeve is 12-20cm, and the thickness of the abrasive sleeve is 7-9mm; the abrasive sleeve is prepared from the following raw materials in parts by weight: 24-28 parts of silicon carbide, 45-50 parts of silicon carbide and 25-30 parts of phenolic resin; the size of the silicon carbide is 180-200 meshes, and the size of the silicon carbide is 250-500 meshes. The service time of the water drill processing grinding wheel is 2.5 years, and the processing cost is about 9000 yuan; the service time of the unit cost is longer, so that the cost can be reduced; the downtime of the water drill grinding and polishing machine can be reduced, and the production efficiency is improved; the number of replacement times can be reduced, and the labor is saved.

Description

Rhinestone processing grinding wheel and preparation method thereof

technical field

The invention belongs to the technical field of rhinestone processing, and in particular relates to a grinding wheel for rhinestone processing and a preparation method thereof.

Background technique

Rhinestone is a kind of jewelry accessories obtained by cutting pearl blanks into diamond facets. It is very popular because it is more economical and has a diamond-like eye-catching visual effect. At present, the rhinestone manufacturing process is mainly divided into two steps: the first part is the shape manufacturing of the rhinestone (semi-finished product), which is mainly realized by the rhinestone grinding and polishing machine; the second part refers to the post-processing of the semi-finished product, and the process is mainly composed of cleaning, suction mold, Inspection, re-cleaning, silver plating and painting and other processes.

Wherein, the rhinestone grinding and polishing machine uses a plurality of rhinestone processing grinding wheels and a plurality of rhinestone processing polishing wheels for grinding and polishing the rhinestones respectively. Existing rhinestone processing grinding wheels usually include a carbon steel grinding wheel base, a nickel layer on the surface of the carbon steel grinding wheel base, and a corundum layer electroplated on the nickel layer. The thickness of the corundum layer is about 1 mm, and the corundum layer is made of corundum with a mesh size of 220 or more.

Under normal circumstances, the use time of a rhinestone processing grinding wheel is 15-20 days, and the processing cost is 500-600 yuan; it can be seen that the use time of the rhinestone processing grinding wheel is relatively short, and the rhinestone grinding and polishing machine needs to be stopped frequently for replacement, which is not only time-consuming and laborious. Not only the cost is higher, but also the output will be reduced.

Contents of the invention

In order to solve the foregoing problems, the embodiment of the present invention provides a diamond processing grinding wheel and a preparation method thereof. The use time of the rhinestone processing grinding wheel is 2.5 years, and the processing cost is about 9000 yuan; the unit cost is longer in use time, which can reduce the cost ; It can reduce the downtime of the diamond grinding and polishing machine and improve production efficiency; it can reduce the number of replacements and save labor. Described technical scheme is as follows:

On the one hand, the embodiment of the present invention provides a diamond grinding wheel, comprising a cylindrical carbon steel grinding wheel base 1 and a plurality of abrasive sleeves 2 sleeved outside the carbon steel grinding wheel base 1, and the plurality of abrasive sleeves 2 are placed on the carbon steel grinding wheel. The axial direction of the substrate 1 is arranged side by side and it is coaxially arranged with the carbon steel grinding wheel substrate 1, and the abrasive cover 2 is bonded on the carbon steel grinding wheel substrate 1 by epoxy resin 3; the length of the abrasive cover 2 is 12 -20cm, its thickness is 7-9mm; Described abrasive cover 2 is made of the raw material of following weight parts: corundum 24-28 part, silicon carbide 45-50 part and phenolic resin 25-30 part; The size of described corundum is 180-200 mesh, the size of the silicon carbide is 250-500 mesh.

Wherein, the processing conditions of the abrasive material sleeve 2 in the embodiment of the present invention are: hold the pressure at a pressure of 45-60t for 2.5-3.5h, and heat to 170-190°C.

Preferably, the processing conditions of the abrasive sleeve 2 in the embodiment of the present invention are: hold the pressure at 50t for 3h, and heat to 180°C.

Wherein, the length of the abrasive cover 2 in the embodiment of the present invention is 15 cm, and the carbon steel grinding wheel base 1 is covered with 6 abrasive covers 2 .

Specifically, the size of the diamond processing grinding wheel in the embodiment of the present invention is: the outer diameter is 300mm, and the length is 895mm; the diameter of the carbon steel grinding wheel substrate 1 is 6-8mm smaller than the inner diameter of the abrasive cover 2; the abrasive cover 2 The outer diameter is 300mm, and its thickness is 8mm.

On the other hand, the embodiment of the present invention also provides a method for preparing a diamond processing grinding wheel, the method comprising:

S101: Mix emery, silicon carbide and phenolic resin according to the ratio, and inject the mixture into the mold;

S102: Pressurize the mold on a hydraulic press, keep the pressure at 45-60t for 2.5-3.5h, and heat to 170-190°C;

S103: After the pressure holding is completed, remove the pressure, cool naturally and demould to obtain the abrasive sleeve blank;

S104: roughen the inner wall of the abrasive sleeve blank or process spiral patterns on the inner wall of the abrasive sleeve blank to the abrasive sleeve 2;

S105: bonding the abrasive sleeve 2 to the carbon steel grinding wheel base 1 through epoxy resin, and curing naturally for 4-10 hours;

S106: Perform cylindrical grinding on the outer wall of the grinding wheel processed in step S105 to obtain a rhinestone processing grinding wheel.

Wherein, the size of the abrasive cover 2 in the embodiment of the present invention is: the length is 15cm, and the thickness is 8mm; in step S101, the height of the mold filled with the mixture is 19-20cm. The gap between them is 10mm.

Preferably, in step S102, multiple molds are stacked up and down and pressurized simultaneously on a hydraulic press.

Wherein, in step S102, the mold includes an outer mold, an inner mold, a base and a gland, and the outer mold, the inner mold, the base and the gland enclose a molding cavity matched with the abrasive sleeve; the base is a flange Disk structure, the center of the upper side is coaxially provided with a circular groove matching the outer wall of the inner mold, and the upper side is coaxially provided with a ring groove outside the circular groove; the outer mold is cylindrical and its bottom is coaxially provided with A flange, the flange is matched with the base and the bottom is coaxially provided with a protruding ring matching the ring groove, the inner wall of the protruding ring, the inner wall of the flange and the inner wall of the outer mold are flush; the outer mold The mold and the base are fixed by bolts in the flange holes; the inner mold is cylindrical, and at least one supporting ring is coaxially arranged inside, and a handle is arranged on the top along its radial direction; the gland includes an annular cover Plate and the pressure ring coaxially arranged on the underside thereof, the inner wall of the pressure ring is flush with the inner wall of the gland and it fits with the outer wall of the inner mould, and the outer wall of the outer mould fits with the inner wall of the outer mould; the outer mold and the outer mould. The heights of the inner molds are all greater than 19cm, and the height of the inner molds is larger than that of the outer molds.

The beneficial effects brought by the technical solution provided by the embodiment of the present invention are: the embodiment of the present invention provides a rhinestone processing grinding wheel and its preparation method. Trial on the polishing machine, and will be used on a large number of grinding and polishing machines in 2020), the processing cost is about 9,000 yuan; the unit cost is longer in use, which can reduce costs; it can reduce the downtime of the rhinestone grinding and polishing machine, improve production efficiency, and then increase output. ; It can reduce the number of replacements and save labor. In addition, the rhinestone processing grinding wheel has higher grinding efficiency, and the processing time of a single rhinestone (material is silicon dioxide, ovule diameter is 2.5-2.6mm) can be reduced from 3.0s to 2.9s.

Description of drawings

Fig. 1 is the structural representation of the diamond processing grinding wheel in the embodiment of the present invention;

Fig. 2 is the flow chart of the preparation method of the rhinestone processing grinding wheel in the embodiment of the present invention;

Fig. 3 is the structural representation of base;

Fig. 4 is a sectional view of the base;

Fig. 5 is the structural representation of outer mold;

Fig. 6 is the sectional view of outer mold;

Fig. 7 is the structural representation of inner mold;

Fig. 8 is a sectional view of the inner mold;

Fig. 9 is a sectional view of the gland.

In the figure: 1 mold seat, 2 backing plate, 3 outer mold, 4 inner mold, 5 support plate, 6 gland, 7 tie rod, 8 pull ring, 9 supporting convex ring, 10 positioning hole, 11 annular boss, 12 circle Ring groove, 13 braces, 14 kraft paper, 15 through holes, 16 petals.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

Example 1

Referring to FIG. 1 , Embodiment 1 provides a grinding wheel for rhinestone processing, which includes a cylindrical carbon steel grinding wheel base 1 and a plurality of abrasive sleeves 2 sleeved thereon. A plurality of abrasive sleeves 2 are arranged side by side in the axial direction of the carbon steel grinding wheel base 1 and are coaxially arranged with the carbon steel grinding wheel base 1 , and the abrasive sleeves 2 are bonded to the carbon steel grinding wheel base 1 by epoxy resin 3 . The length of abrasive material cover 2 is 12-20cm, and its thickness is 7-9mm. In this patent, the abrasive material sleeve 2 is relatively thin and needs to be controlled in length. If the length is too long, it will be difficult to form. The abrasive cover 2 is made of the following raw materials in parts by weight: 24-28 parts of corundum, 45-50 parts of silicon carbide and 25-30 parts of phenolic resin. The size of corundum is 180-200 mesh, and the size of silicon carbide is 250-500 mesh. Among them, silicon carbide is used as a filler; corundum is used as an abrasive, its particle size is larger than that of conventional technology, and its cost is about 0.1 yuan/carat less than that of corundum used in conventional technology. Wherein, the raw materials in the present invention are all in powder form, and the volume of the raw materials is 1.3-1.35 times of the volume of the rhinestone processing grinding wheel.

Wherein, the processing conditions of the abrasive material sleeve 2 in the embodiment of the present invention are: hold the pressure at a pressure of 45-60t for 2.5-3.5h, and heat to 170-190°C. Among them, the pressure of the present invention is relatively small.

Preferably, the processing conditions of the abrasive sleeve 2 in the embodiment of the present invention are: hold the pressure at 50t for 3h, and heat to 180°C.

Wherein, the length of the abrasive cover 2 in the embodiment of the present invention is 15 cm, and the carbon steel grinding wheel base 1 is covered with 6 abrasive covers 2 .

Specifically, the size of the rhinestone processing grinding wheel in the embodiment of the present invention is: the outer diameter is 300 mm, and the length is 895 mm. The diameter of the carbon steel grinding wheel substrate 1 is 6-8mm smaller than the inner diameter of the abrasive material sleeve 2 . The outer diameter of the abrasive sleeve 2 is 300mm, and its thickness is 8mm.

Example 2

Referring to Fig. 2, embodiment 2 provides a kind of preparation method of rhinestone processing grinding wheel, and the method comprises:

S101: Mix the corundum, silicon carbide and phenolic resin according to the ratio, and inject the mixture into the mold. Among them, the mold needs to be coated with release oil in advance.

S102: Pressurize the mold on a hydraulic press, keep the pressure at 45-60t for 2.5-3.5h, and heat to 170-190°C.

S103: After the pressure holding is completed, the pressure is released, cooled naturally and demolded to obtain an abrasive sleeve blank.

S104: roughen the inner wall of the abrasive sleeve blank or process spiral patterns on the inner wall of the abrasive sleeve blank to ensure that the abrasive sleeve 2 is bonded firmly. For the processing equipment of the inner wall, please refer to the description of the patents with application number CN202011480435.2 and application number CN202020078929.7.

S105: bonding the abrasive sleeve 2 to the carbon steel grinding wheel base 1 through epoxy resin, and curing naturally for 4-10 hours. The outer wall of the carbon steel grinding wheel base 1 needs to be processed by cylindrical grinding. This step can be processed on a special tool, and it is necessary to ensure that the inner and outer walls of multiple abrasive sleeves 2 are flush and coaxial with the carbon steel grinding wheel base 1; plastic sheets can be filled between the inner walls of the abrasive sleeves 2 and the carbon steel grinding wheel base 1 to adjust the gap.

S106: Perform cylindrical grinding on the outer wall of the grinding wheel processed in step S105 to obtain a rhinestone processing grinding wheel. The cylindrical grinding process the rhinestone processing grinding wheel to a specified size, and make the error of the outer wall comply with the regulations. It is necessary to ensure that the error of the outer wall of the grinding wheel is less than 15 silk.

Wherein, the size of the abrasive material cover 2 in the embodiment of the present invention is: the length is 15cm, and the thickness is 8mm; The gap is 10mm, leaving a certain machining allowance.

Preferably, in step S102, multiple molds are stacked up and down and pressurized simultaneously on a hydraulic press. Specifically, five molds were stacked up and down and pressed simultaneously on a hydraulic press. This method can improve work efficiency and make each abrasive material sleeve 2 more uniform.

Wherein, in step S102, referring to Fig. 3-9, the mold in this embodiment includes an outer mold, an inner mold, a base and a gland, and the outer mold, the inner mold, the base and the gland enclose a forming cavity matched with the abrasive sleeve . The base is a flange structure, and the center of the upper side is coaxially provided with a circular groove (with a diameter of 290mm) that matches the outer wall of the inner mold. ) is the same as the inner diameter of the convex ring, its outer diameter (360mm) is the same as the outer diameter of the convex ring), the diameter of its central hole is 200mm, and its outer diameter is 520mm. The outer mold is cylindrical (outer diameter 420mm, inner diameter 310mm) and its bottom is coaxially provided with a flange (outer diameter 483mm), the flange is matched with the base and its bottom is coaxially provided with a ring groove The convex ring (outer diameter 360mm). Preferably, a plurality of reinforcing ribs are provided between the upper side of the outer mold and the upper side of the flange, and the plurality of reinforcing ribs are evenly distributed around the outer mold. The inner wall of the convex ring, the inner wall of the flange and the inner wall of the outer mold are flush. The outer mold and the base are fixed by bolts in the flange holes. The inner mold (with an outer diameter of 290mm) is cylindrical, and at least one support ring is arranged coaxially inside it, and a handle is arranged on the top along its radial direction for easy demoulding. Specifically, there are two supporting rings, one supporting ring is arranged at the bottom of the inner mold, and the other supporting ring is arranged at the upper part of the inner mold. The gland includes an annular cover plate (its outer diameter is greater than 420mm) and a pressure ring coaxially arranged on the lower side. The inner wall of the pressure ring is flush with the inner wall of the gland and is matched with the outer wall of the inner mold. inner wall clearance fit. The heights of the outer mold and the inner mold are all greater than 19cm, and the height of the inner mold is larger than that of the outer mold. After pressurizing and closing the mold, the distance between the lower end of the pressure ring and the base is 15cm. When multiple molds are stacked one above the other, the base of the previous mold is placed on top of the gland of the next mold.

The service life and the cost of the rhinestone processing grinding wheel produced by the present invention are described below: work 24 hours a day, count 330 days a year, process glass ovules of the same specification and material, and the cost of processing raw materials is as shown in Table 1:

Table 1

The above is only the difference in raw material costs. If labor costs and processing equipment loss costs are added, the gap will be even greater, which can significantly reduce costs (the company has hundreds of grinding wheels working at the same time, and the benefits are even more impressive).

The grinding efficiency of the rhinestone processing grinding wheel produced by the invention is explained below: the material of the ovule is silicon dioxide, the diameter of the ovule is 2.5-2.6mm, two grinding and two polishing are adopted, the polishing wheels are the same, and the rhinestone grinding and polishing machine of the same specification is used The average processing time of the rhinestone ovule using the existing grinding wheel is about 3s, and the average processing time of the grinding wheel of the present invention is about 2.9s, that is, the grinding wheel provided by the present invention has higher grinding efficiency. If the downtime when the grinding wheel is replaced is added, the production efficiency of the grinding wheel of the present invention is improved more; through production practice, the output can be increased by more than 5% compared with the prior art.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection of the present invention. within range.

Claims (9)

1. The water drilling processing grinding wheel comprises a cylindrical carbon steel grinding wheel substrate (1); the grinding wheel is characterized by further comprising a plurality of grinding material sleeves (2) sleeved outside the carbon steel grinding wheel substrate (1), wherein the grinding material sleeves (2) are arranged side by side in the axial direction of the carbon steel grinding wheel substrate (1) and are coaxially arranged with the carbon steel grinding wheel substrate (1), and the grinding material sleeves (2) are adhered to the carbon steel grinding wheel substrate (1) through epoxy resin (3); the length of the abrasive sleeve (2) is 12-20cm, and the thickness of the abrasive sleeve is 7-9mm; the abrasive material sleeve (2) is prepared from the following raw materials in parts by weight: 24-28 parts of silicon carbide, 45-50 parts of silicon carbide and 25-30 parts of phenolic resin; the size of the silicon carbide is 180-200 meshes, and the size of the silicon carbide is 250-500 meshes.

2. The water drill machining grinding wheel according to claim 1, characterized in that the machining conditions of the abrasive sleeve (2) are: maintaining the pressure for 2.5-3.5h under the pressure of 45-60t, and heating to 170-190 ℃.

3. The water drill machining grinding wheel according to claim 2, characterized in that the machining conditions of the abrasive sleeve (2) are: the pressure was maintained at 50t for 3h and heated to 180 ℃.

4. The water drilling grinding wheel according to claim 1, characterized in that the length of the abrasive sleeve (2) is 15cm, and the carbon steel grinding wheel base body (1) is sleeved with 6 abrasive sleeves (2).

5. The water jet milling wheel as claimed in claim 4, wherein the water jet milling wheel has dimensions of: the outer diameter is 300mm, and the length is 895mm; the diameter of the carbon steel grinding wheel matrix (1) is 6-8mm smaller than the inner diameter of the grinding sleeve (2); the outer diameter of the abrasive sleeve (2) is 300mm, and the thickness of the abrasive sleeve is 8mm.

6. A method of making a water jet machining grinding wheel as claimed in any one of claims 1 to 5, wherein the method comprises:

s101: mixing silicon carbide, silicon carbide and phenolic resin according to a proportion, and injecting the mixture into a mold;

s102: pressurizing the die on a hydraulic press, maintaining the pressure for 2.5-3.5 hours under the pressure of 45-60t, and heating to 170-190 ℃;

s103: after the pressure maintaining is completed, the pressure is removed, and the abrasive sleeve blank is obtained after natural cooling and demoulding;

s104: roughening the inner wall of the abrasive sleeve blank or machining spiral lines on the inner wall of the abrasive sleeve blank to the abrasive sleeve (2);

s105: bonding the abrasive sleeve (2) on the carbon steel grinding wheel matrix (1) through epoxy resin, and naturally curing for 4-10 hours;

s106: and (5) carrying out external circle grinding on the outer wall of the grinding wheel processed in the step (S105) to obtain the water drill processing grinding wheel.

7. The method according to claim 6, characterized in that the dimensions of the abrasive sheath (2) are: the length is 15cm, and the thickness is 8mm; in step S101, the height of the mixture filling mould is 19-20cm, and the gap between the inner mould and the outer mould of the mould is 10mm.

8. The method according to claim 6, wherein in step S102, the plurality of molds are stacked one on top of the other and then pressurized simultaneously on a hydraulic press.

9. The method of manufacturing according to claim 6, wherein in step S102, the mold comprises an outer mold, an inner mold, a base, and a gland, the outer mold, the inner mold, the base, and the gland enclosing a molding cavity that mates with an abrasive sheath; the base is of a flange structure, the center of the upper side of the base is coaxially provided with a circular groove matched with the outer wall of the inner die, and the upper side of the base is coaxially provided with a ring groove outside the circular groove; the outer die is cylindrical, the bottom of the outer die is coaxially provided with a flange, the flange is matched with the base, the bottom of the outer die is coaxially provided with a convex ring matched with the annular groove, and the inner wall of the convex ring, the inner wall of the flange and the inner wall of the outer die are flush; the outer die and the base are fixed through bolts in the flange holes; the inner die is cylindrical, at least one supporting ring is coaxially arranged in the inner die, and a lifting handle is arranged at the top of the inner die along the radial direction of the inner die; the gland comprises an annular cover plate and a compression ring coaxially arranged at the lower side of the annular cover plate, the inner wall of the compression ring is flush with the inner wall of the gland and is in clearance fit with the outer wall of the inner die, and the outer wall of the compression ring is in clearance fit with the inner wall of the outer die; the heights of the outer die and the inner die are larger than 19cm, and the height of the inner die is larger than that of the outer die.

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