Diamond bead grinding wheel

Abstract

The utility model discloses a diamond bead grinding wheel which comprises a metal base body and bead tool bits, the metal base body is in a bowl shape, a center installation hole is formed in the bowl bottom of the metal base body, an annular grinding face is arranged on the bowl opening portion of the metal base body, and the bead tool bits are arranged on the metal base body. The grinding surface is provided with one or two circles of circular tool bit holes which are uniformly distributed in a concentric circle with the central mounting hole, the tool bit holes are through holes, the bead tool bits are sintered diamond bead tool bits, the bead tool bits are T-shaped tool bits with large and small heads, the small heads of the bead tool bits are slightly smaller than the tool bit holes, and the small heads of the bead tool bits are smaller than the tool bit holes. The small head of the bead tool bit is inserted into the large head hole and is connected with the metal base body in a brazing mode. In the grinding process, the grinding contact area of the annular bead tool bit is small, the grinding force is reduced, and the grinding efficiency is high.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of diamond grinding wheels, in particular to a diamond bead grinding wheel for stone and concrete. BACKGROUND

[0002] Traditional diamond bowl-shaped grinding wheels used on handheld power tools have various solid bit head structures, such as a split-type diamond grinding wheel disclosed in Chinese Patent No. CN202323624231.3 on August 20, 2024, which comprises a mounting disc, a plurality of polishing heads arranged in a circumferential array and detachably connected to the edge of the mounting disc, and a chip removal groove formed between each adjacent polishing head. The polishing head comprises a main grinding block and side grinding blocks on both sides of the main grinding block, and the side grinding blocks are detachably connected to the main grinding block. Although these grinding wheels have chip removal grooves, the contact area with the ground stone, cement components, etc. is large during grinding, and the generated grinding debris is not easy to remove, which may result in low grinding efficiency. After long-time work, the grinding temperature rises, which may cause the phenomenon of burn-in of the bit head and deformation of the grinding wheel base, resulting in failure of the grinding wheel. CONTENT OF THE UTILITY MODEL

[0003] Therefore, the application provides a diamond bead grinding wheel, which adopts a bead bit head structure with a central through hole, and corresponding through holes are designed on the base. During grinding, the circular ring-shaped bead bit head has a small grinding contact area, which reduces the grinding force and improves the grinding efficiency. The through hole structure in the center of the bead bit head can quickly remove the generated grinding debris and has a good air cooling effect, which can prevent the grinding wheel from failing due to too high grinding temperature after long-time work.

[0004] According to one aspect of the application, a diamond bead grinding wheel is provided in an embodiment, which comprises a metal base and a bead bit head. The metal base is in the shape of a bowl, the bottom of the bowl has a central mounting hole, and the mouth of the bowl has a ring-shaped grinding surface. A circle or two circles of circular bit hole are uniformly distributed on the grinding surface and concentric with the central mounting hole. The bit hole is a through hole. The bead bit head is a sintered diamond bead bit head. The bead bit head is a T-shaped bit head with large and small heads. The small head of the bead bit head is slightly smaller than the bit hole, and the small head is inserted into the large head hole to be connected to the metal base by brazing.

[0005] Further, the number of bit holes on the grinding surface of the metal base is 4-16 per circle.

[0006] Further, the metal base grinding surface has two circles of bit holes, and the number of inner circle bit holes is the same as or one quarter to one half of the outer circle.

[0007] Further, the metal base has two rows of tool bit holes on the grinding surface, and the number of tool bit holes in the inner row is less than that in the outer row, and a chip removal hole is arranged between two adjacent tool bit holes in the inner row, and the size of the chip removal hole is greater than that of the tool bit hole.

[0008] Further, the metal base has two rows of tool bit holes on the grinding surface, and the number of tool bit holes in the inner row is less than that in the outer row, and a chip removal hole is arranged between two adjacent tool bit holes in the inner row, and the size of the chip removal hole is greater than that of the tool bit hole.

[0009] Further, the metal base has two rows of tool bit holes on the grinding surface, and the number of tool bit holes in the inner row is less than that in the outer row, and a chip removal hole is arranged between two adjacent tool bit holes in the inner row, and the size of the chip removal hole is greater than that of the tool bit hole.

[0010] Further, the metal base has two rows of tool bit holes on the grinding surface, and the number of tool bit holes in the inner row is less than that in the outer row, and a chip removal hole is arranged between two adjacent tool bit holes in the inner row, and the size of the chip removal hole is greater than that of the tool bit hole.

[0011] Further, the metal base has two rows of tool bit holes on the grinding surface, and the number of tool bit holes in the inner row is less than that in the outer row, and a chip removal hole is arranged between two adjacent tool bit holes in the inner row, and the size of the chip removal hole is greater than that of the tool bit hole.

[0012] Further, the metal base has two rows of tool bit holes on the grinding surface, and the number of tool bit holes in the inner row is less than that in the outer row, and a chip removal hole is arranged between two adjacent tool bit holes in the inner row, and the size of the chip removal hole is greater than that of the tool bit hole.

[0013] The beneficial effects of the utility model are:

[0014] 1. The diamond string bead grinding wheel of the utility model, the small head of the string bead tool bit is inserted into the tool bit hole, and is connected together in the way of brazing, so that the tool bit and the metal base are combined firmly, and the string bead tool bit will not fall off in the process of grinding.

[0015] 2. The diamond string bead grinding wheel of the utility model, the annular string bead tool bit has small grinding contact area, so that the grinding force is reduced and the grinding efficiency is high.

[0016] 3. The diamond string bead grinding wheel of the utility model, the through hole structure in the center of the string bead tool bit can quickly remove the grinding debris, and has good air cooling effect, so that the grinding wheel will not be invalid due to high temperature after long time working. DRAWINGS

[0017] Figure 1 It is the structure schematic view of the utility model embodiment one;

[0018] Figure 2 It is the sectional structure schematic view of the utility model embodiment one;

[0019] Figure 3 It is the sectional structure schematic view of the string bead tool bit of the utility model;

[0020] Figure 4 It is the structure schematic view of the utility model embodiment two;

[0021] Figure 5 Figure 3 is a structural schematic diagram of the third embodiment of the present application.

[0022] In the figure: 100, metal base; 110, bowl bottom; 111, center mounting hole; 120, bowl wall; 121, heat dissipation hole; 130, grinding surface; 131, cutter head hole; 132, chip removal hole; 200, string bead cutter head; 210, large head; 220, small head; 230, center through hole. DETAILED DESCRIPTION

[0023] The application will be described in further detail below with specific embodiments and with reference to the drawings. In different embodiments, similar elements are denoted by similar reference numerals. In the following embodiments, many details are described in order to make the application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different cases, or can be replaced by other elements, materials, methods. In some cases, some operations related to the application are not shown or described in the specification, in order to avoid the core part of the application being overwhelmed by too much description, and it is not necessary to describe these related operations in detail for those skilled in the art, who can fully understand the related operations according to the description in the specification and the general technical knowledge in the art.

[0024] In addition, the features, operations or characteristics described in the specification can be combined in any appropriate manner to form various embodiments, and the operation steps involved in each embodiment can also be sequentially adjusted or adjusted in a manner that is obvious to those skilled in the art. Therefore, the specification and drawings are only for the purpose of clearly describing one embodiment, and do not mean that the composition and / or order is necessary.

[0025] In this paper, the serial numbers of components, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any order or technical meaning. Unless otherwise specified, "connection" and "coupling" in this application include direct and indirect connection (coupling).

[0026] Embodiment one:

[0027] Please refer to Figure 1 , Figure 2 and Figure 3 According to one aspect of the application, an embodiment provides a diamond string bead grinding wheel, which comprises a metal base 100 and a string bead cutter head 200.

[0028] The metal base 100 is in the shape of a bowl, including a flat bowl bottom 110, a slanted bowl wall 120, and a flat bowl mouth, the metal base 100 is punched from a 45# steel plate with a thickness of 4mm, the center of the bowl bottom 110 is provided with a center mounting hole 111 with a diameter of 20mm, six circular heat dissipation holes 121 with a diameter of 25mm are uniformly arranged on the bowl wall 120, the flat surface of the bowl mouth is a grinding surface 130, the outer circle diameter of the grinding surface 130 is 105mm, the inner circle diameter is 93mm, 12 circular tool bit holes 131 with a diameter of 7.6mm are uniformly arranged on the grinding surface 130 with the center mounting hole 111 as the center of a circle with a diameter of 99mm, and the tool bit holes 131 are through holes.

[0029] The string bead tool bit 200 is a sintered diamond string bead tool bit, including a tool bit base, the tool bit base is in the shape of a circular tube, has a center through hole 230 with an outer diameter of 7.5mm, an inner diameter of 6.3mm, and a length of 12mm, a metal layer containing diamond is sintered on the tool bit base in a sintered manner, such as copper powder 40 parts, iron powder 18 parts, diamond with a particle size of 40 / 45 12 parts, and adhesive 1 part configured according to a ratio of 1:2:1 of polytetrafluoroethylene powder, cobalt powder, and tungsten powder, are mixed uniformly and then cold-pressed into a shape using a grinding tool, the cold-pressing pressure is 15MPa, after cold-pressing, high-temperature sintering is performed, the sintering temperature is 700℃, and the time is 4.5 hours, after sintering, a large head 210 with a diameter of 11mm and a small head 2220 with a diameter of 7.5mm of the string bead tool bit 200 are obtained.

[0030] The small head 220 of the string bead tool bit 200 is coated with a solder, such as silver-copper-titanium solder, and then inserted into the tool bit hole 131 on the metal base 100, and then heated to 850℃ in a vacuum environment, and cooled after holding for 5 minutes, so that the string bead tool bit 200 is firmly combined with the metal base 100 in a brazed form, to obtain a diamond string bead grinding wheel of the embodiment.

[0031] Embodiment two:

[0032] Please refer to Figure 4 According to an aspect of the present application, a diamond string bead grinding wheel is provided in an embodiment, including a metal base 100 and a string bead tool bit 200.

[0033] The metal base 100 is in the shape of a bowl, including a flat bowl bottom 110, a slanted bowl wall 120, and a flat bowl mouth, the metal base 100 is punched from a 40Mn steel plate with a thickness of 4.0mm, the center of the bowl bottom 110 is provided with a center mounting hole 111 with a diameter of 20mm, the bowl wall 120 is provided with six circular heat dissipation holes 121 with a diameter of 25mm, the flat surface of the bowl mouth is a grinding surface 130, the outer circle of the grinding surface 130 has a diameter of 125mm and the inner circle has a diameter of 98mm, the grinding surface is provided with four inner circle and twelve outer circle circular tool bit holes 131 with a diameter of 8.1mm, and the tool bit holes 131 are through holes.

[0034] The string bead tool bit 200 is a sintered diamond string bead tool bit, including a tool bit base, the tool bit base is in the shape of a circular tube, has a center through hole 230 with an outer diameter of 8.0mm, an inner diameter of 6.7mm, and a length of 4.5mm, and a metal layer containing diamond is sintered on the tool bit base, such as copper powder 40 parts, iron powder 18 parts, diamond with a particle size of 40 / 45 12 parts, and adhesive 1 part configured according to a ratio of 1:2:1 of polytetrafluoroethylene powder, cobalt powder, and tungsten powder, mixed uniformly and then cold-pressed into a shape by a grinding tool, the cold-pressing pressure is 15MPa, and after cold-pressing, high-temperature sintering is performed, the sintering temperature is 700℃, and the time is 5 hours, after sintering, a large head 210 with a diameter of 12mm and a small head 220 with a diameter of 8.0mm are obtained.

[0035] The small head 220 of the string bead tool bit 200 is coated with a solder, such as silver copper titanium solder, and then inserted into the tool bit hole 131 of the metal base 100, and then heated to 850℃ in a vacuum environment, and cooled after holding for 5 minutes, so that the string bead tool bit 200 is firmly combined with the metal base 100 in the form of brazing, forming a diamond string bead grinding wheel of the embodiment.

[0036] Example Three:

[0037] Please refer to Figure 5 According to an aspect of the present application, a diamond string bead grinding wheel is provided in an embodiment, including a metal base 100 and a string bead tool bit 200.

[0038] The metal base 100 is in the shape of a bowl, including a flat bowl bottom 110, a slanted bowl wall 120, and a flat bowl mouth, the metal base 100 is punched from a 40Mn steel plate with a thickness of 4.5mm, the center of the bowl bottom 110 is provided with a center mounting hole 111 with a diameter of 24.5mm, eight circular heat dissipation holes 121 with a diameter of 20mm are uniformly arranged on the bowl wall 120, the flat surface of the bowl mouth is referred to as a grinding surface 130, the outer circle of the grinding surface 130 has a diameter of 150mm and the inner circle has a diameter of 110mm, the grinding surface 130 is uniformly provided with eight circular tool bit holes 131 with a diameter of 7.6mm in the inner circle and sixteen circular tool bit holes 131 with a diameter of 8.1mm in the outer circle on a circle with a diameter of 122mm and a circle with a diameter of 138mm respectively, the center of the circle with a diameter of 122mm is the center mounting hole 111, the tool bit holes 131 are through holes, and a chip removal hole 132 is arranged between the eight circular tool bit holes with a diameter of 7.6mm in the inner circle, i.e. between any two adjacent circular tool bit holes 131 in the inner circle.

[0039] The string bead tool bit 200 is a sintered diamond string bead tool bit, and there are two types.

[0040] One type has a small outer diameter, including a tool bit base, the tool bit base is in the shape of a circular tube, has a center through hole 230, the outer diameter is 7.5mm, the inner diameter is 6.3mm, and the length is 12mm, a metal layer containing diamond is sintered on the tool bit base in a sintering manner, for example, by weight, 40 parts of copper powder, 18 parts of iron powder, 12 parts of diamond with a particle size of 40 / 45, and 1 part of an adhesive configured by mixing polytetrafluoroethylene powder, cobalt powder, and tungsten powder in a ratio of 1:2:1 are uniformly mixed and then cold-pressed into a mold, the cold-pressing pressure is 15MPa, and after cold-pressing, high-temperature sintering is performed, the sintering temperature is 700℃, the time is 4.5 hours, and after sintering, a string bead tool bit 200 with a large head 210 with a diameter of 11mm and a small head 220 with a diameter of 7.5mm is obtained.

[0041] The other type has a large outer diameter, including a tool bit base, the tool bit base is in the shape of a circular tube, has a center through hole 230, the outer diameter is 8.0mm, the inner diameter is 6.7mm, and the length is 4.5mm, a metal layer containing diamond is sintered on the tool bit base in a sintering manner, for example, by weight, 40 parts of copper powder, 18 parts of iron powder, 12 parts of diamond with a particle size of 40 / 45, and 1 part of an adhesive configured by mixing polytetrafluoroethylene powder, cobalt powder, and tungsten powder in a ratio of 1:2:1 are uniformly mixed and then cold-pressed into a mold, the cold-pressing pressure is 15MPa, and after cold-pressing, high-temperature sintering is performed, the sintering temperature is 700℃, the time is 5 hours, and after sintering, a string bead tool bit 200 with a large head 210 with a diameter of 12mm and a small head 220 with a diameter of 8.0mm is obtained.

[0042] The small head 220 of the string bead tool bit 200 with a smaller outer diameter is smeared with a brazing material such as silver copper titanium brazing material, and then inserted into the inner ring tool bit hole 131 on the metal base 100; the small head 220 of the string bead tool bit 200 with a larger outer diameter is smeared with a brazing material such as silver copper titanium brazing material, and then inserted into the outer ring tool bit hole 131 on the metal base 100; then heated to 850 DEG C under vacuum, and after holding for 5 minutes, cooled, so that the string bead tool bit 200 is firmly combined with the metal base 100 in the form of brazing, to form a diamond string bead grinding wheel of the embodiment.

[0043] The diamond string bead grinding wheel can have an outer diameter specification of 105 mm, 115 mm, 120 mm, 125 mm, 150 mm, 180 mm, etc.

[0044] The above describes the utility model by using specific examples, which is only used to help understand the utility model, and does not limit the utility model. According to the idea of the utility model, a person skilled in the art to which the utility model belongs can make a number of simple deductions, deformations or substitutions.

Claims

1. A diamond bead stringing wheel characterized by: The application relates to a metal base (100) and a string bead cutter head (200), wherein the metal base (100) is in the shape of a bowl, the bottom (110) of the bowl has a central mounting hole (111), the mouth of the bowl has a ring-shaped grinding surface (130), the grinding surface (130) is provided with one or two rings of circular cutter head holes (131) which are uniformly distributed on the concentric circle of the central mounting hole (111), the cutter head hole (131) is a through hole, the string bead cutter head (200) is a sintered diamond string bead cutter head, the string bead cutter head (200) is a T-shaped cutter head with different sizes, the small head (220) of the string bead cutter head (200) is slightly smaller than the cutter head hole (131), the small head (220) of the string bead cutter head (200) is inserted into the cutter head hole (131) and connected with the metal base (100) in the mode of brazing.

2. A diamond bead stringing grinding wheel according to claim 1, characterized in that: The number of cutter head holes (131) on the grinding surface (130) of the metal base (100) is 4-16 per ring.

3. A diamond bead stringing grinding wheel according to claim 2, wherein: The grinding surface (130) of the metal base (100) has two rings of cutter head holes (131), the number of cutter head holes (131) in the inner ring is the same as that in the outer ring or half of that in the outer ring.

4. A diamond bead stringing grinding wheel according to claim 3, wherein: When the grinding surface (130) of the metal base (100) has two rings of cutter head holes (131) and the number of cutter head holes (131) in the inner ring is less than that in the outer ring, a chip removal hole (132) can be arranged between two adjacent cutter head holes (131) in the inner ring, and the size of the chip removal hole (132) is larger than that of the cutter head hole (131).

5. The diamond bead stringing grinding wheel of claim 1, wherein: The bowl wall of the metal base is provided with a plurality of heat dissipation holes which are uniformly distributed in the circumferential direction.

6. The diamond bead stringing grinding wheel of claim 1, wherein: The string bead cutter head (200) has a central through hole (230).

7. A diamond bead stringing grinding wheel according to claim 6, wherein: The diameter of the central through hole (230) of the string bead cutter head (200) is 5-7 mm, the total height is 11-13 mm, the diameter of the large head (210) of the string bead cutter head (200) is 11-13 mm, the height is 6-9 mm, and the diameter of the small head (220) is 6-8 mm.

8. The diamond bead stringing grinding wheel of claim 6, wherein: The small head (220) of the string bead cutter head (200) does not contain diamond.

9. The diamond bead stringing grinding wheel of claim 6, wherein: The area of the small head (220) of the string bead cutter head (200) extending into the large head (210) does not contain diamond.

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