CN216152133U - Material block for chamfering grinding wheel - Google Patents
Material block for chamfering grinding wheel Download PDFInfo
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- CN216152133U CN216152133U CN202122105927.XU CN202122105927U CN216152133U CN 216152133 U CN216152133 U CN 216152133U CN 202122105927 U CN202122105927 U CN 202122105927U CN 216152133 U CN216152133 U CN 216152133U
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- dovetail
- arc surface
- material block
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- grinding wheel
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Abstract
The utility model aims to provide a material block for a chamfering grinding wheel, aiming at the defects of low material utilization rate, easy cracking and low processing efficiency of the chamfering grinding wheel in the prior art, the material block is arc-shaped, the radius of each material block is equal, the material blocks are connected end to form an annular material layer, the material block for the chamfering grinding wheel adopts the structure that the first side surface is in smooth transition connection with the inner arc surface of the dovetail through the first inner arc surface, the joint strength of the dovetail and the inner arc surface of the material block can be increased, the material layer is effectively prevented from being broken from the material tail part, and the service life of the whole grinding tool is prolonged.
Description
Technical Field
The present invention relates to abrasive articles, and more particularly to a material layer for abrasive articles.
Background
The chamfering grinding wheel is mainly used for chamfering grinding of edges of sapphire wafers, silicon carbide wafers, silicon wafers, glass, ceramic tiles and other products, the edges of the cut wafers or glass are ground into a specified shape, the edges of the cut wafers or glass are attractive, meanwhile, the defects of edge cracks, edge breakage and the like generated in the cutting process are eliminated, the appearance quality and the mechanical strength of the processed products are improved, the machinability of the processed products is improved, and more importantly, the phenomenon that the wafers are broken due to inward extension of the cracks of the edges of the wafers in the subsequent process of the wafers without chamfering can be prevented, and the sharp edges of the wafers scratch people or other contacted objects.
The chamfer grinding wheel sold on the market consists of a base body and a superhard grinding material layer, wherein the base body is usually in a disc shape, a shaft hole is formed in the center of the base body and is used for being connected with a driving shaft of equipment, and the superhard grinding material layer is hereinafter referred to as a material layer and is arranged on the outer circumferential surface of the base body. Usually, the superhard abrasive layer and the substrate are bonded by special glue or welded or sintered. When the base body and the material layer are connected by sintering, the material layer is generally annular and is arranged on the outer circumferential surface of the base body, when the material layer is connected by bonding or welding, the material layer is generally in a block shape, namely material blocks, each material block is arc-shaped, the radius of each material block is equal, and the material blocks are opposite end to form an annular shape. The inner arc surface of each material block is a smooth surface, or a sand blasting layer is arranged, the material layer and the substrate are completely connected by glue solution or solder, or are connected by melting during sintering, therefore, when sintering connection is adopted, stress exists between the material layer and the substrate due to sintering, when the material layer is thinned after use, the stress balance between the material layer and the substrate is broken, the connection firmness between the material layer and the substrate is reduced, and the material layer is easy to ring off in the use process; the connection is carried out by adopting a viscose glue bonding mode, the viscose glue is greatly influenced by the external environment, the bonding force is easily removed in humid and cold weather, and the connection firmness between the material layer and the substrate is reduced. By adopting a welding connection mode, the high temperature generated during welding can cause the deformation and stress of the matrix, and the phenomenon of material layer falling or cracking is easy to generate in the using process.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a material block for a chamfering grinding wheel, aiming at the defects of low material utilization rate, easy cracking and low processing efficiency of the chamfering grinding wheel in the prior art.
The utility model is realized by the following technical scheme:
a material block for a chamfering grinding wheel is arc-shaped, the radius of each material block is equal, the material blocks are connected end to form an annular material layer, the inner arc surface of each material block is provided with a dovetail, the length direction of the dovetail is arranged along the width direction of the material block, one end of the first side surface of the dovetail is in smooth transition connection with the inner arc surface of the dovetail through the first inner arc surface, the other end of the first side surface of the dovetail is in smooth transition connection with the tail end surface of the dovetail through the first outer arc surface, the first side surface is used as a matching surface, the first inner arc surface is a cavity and is a non-matching surface to provide a thermal expansion space, the first outer arc surface is a non-matching surface, the surface corresponding to the base body forms a containing cavity, the radius of the arc of the first inner arc surface is larger than that of the process arc at the position, and the radius of the arc of the first outer arc surface is larger than that of the process arc at the position;
the inclination angle a between the first side surface and the top end surface of the dovetail is 30-45 degrees;
the radius of the first inner arc surface is 0.35-0.5mm, the radius of the first outer arc surface is 0.35-0.75 mm, and the length of the first side surface is 1.5-1.8 mm;
the width B of the dovetail is smaller than the width H of the material block;
the width B of the dovetail is equal to the width H of the material block;
the side surface I is respectively in tangent connection with the inner arc surface I and the outer arc surface I;
the material block comprises a material block body, wherein the material block body is provided with a material block outer arc surface, the material block outer arc surface is provided with a chamfer groove in the arc direction of the material block body, the section of the chamfer groove is one of V-shaped, U-shaped, ladder-shaped and arc-shaped, and the number of the chamfer grooves is more than one.
The utility model has the following beneficial effects:
the material block for the chamfering grinding wheel is adopted, the dovetail is arranged on the inner arc surface of the material block body, one end of the first side surface of the dovetail is smoothly connected with the inner arc surface through the first inner arc surface, the other end of the dovetail is smoothly connected with the second outer arc surface, the first side surface is used as a matching surface to be matched with the second side surface of the dovetail groove on the base body, the first inner arc surface provides an accommodating space for accommodating an expansion part caused by thermal expansion of the base body, so that the material layer and the base body are better matched, meanwhile, glue can be accommodated when the glue is used for auxiliary connection, the bonding strength between the base body and the material layer is increased, the excessive glue is prevented from overflowing or the overflowing amount is reduced, when the material block is installed by adopting a cold contraction method, the edge and corner cracking of the material block is not easy to generate when the material block is cooled, and the rejection rate is reduced; more importantly, by adopting the structure of the utility model, the first side surface is in smooth transition connection with the inner arc surface of the dovetail through the first inner arc surface, so that the connection strength between the dovetail and the inner arc surface of the material block can be increased, the material layer is effectively prevented from being broken from the material tail part, and the service life of the whole grinding tool is prolonged.
Drawings
FIG. 1 is a schematic structural view of an embodiment of a block for a chamfering wheel according to the present invention;
FIG. 2 is a bottom view of FIG. 1;
FIG. 3 is a schematic view of an embodiment of a grinding wheel formed by assembling and mating a mass and a matrix according to embodiments of the present invention;
FIG. 4 is a schematic structural view of an embodiment of the grinding wheel of the present invention with the material layer partially removed, showing primarily the structure of the substrate.
FIG. 5 is a schematic side view of FIG. 3
Description of the reference numerals
101. A material layer; 1012. A dovetail; 1013. a first outer arc surface; 1014. an inner arc surface I; 1015. a material block; 1017. cooling and chip-containing grooves; 1018. chamfering grooves; 1019-side surface 1
102. A substrate; 1021. a base body; 1022. a dovetail groove; 1023. an inner arc surface II; 1024. a second outer arc surface;
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1 to 5, in the material block for a chamfering grinding wheel according to the embodiment of the present invention, the material block body 1011 of each material block 1015 is arc-shaped, the radii of the material blocks are equal, the material blocks 101 can form a ring when the material blocks are connected end to end, the inner arc surface of each material block is provided with the dovetail 1012, each dovetail 1012 is smoothly and transitionally connected with the inner arc surface of the corresponding material block through the inner arc surface one 1014, the edge of the tail end of the dovetail is provided with the outer arc surface one 1013, and the inner arc surface one and the outer arc surface one are smoothly connected through the side surface one 1019. Preferably, the first side surface is in tangent connection with the first inner arc surface and the first outer arc surface, so that the side wall of the dovetail is in an S shape, and a space for expansion and contraction is provided for expansion and contraction of heat and contraction of cold. The width of the dovetail can be smaller than the width of the material block, when the width of the dovetail is smaller than the width of the material block, the dovetail is preferably centered, and the width B of the dovetail can also be equal to the width H of the material block. It should be noted that, in the present invention, the arc surface of the first inner arc surface is not the surface formed by the process arc formed during the manufacturing process, but is a manually designed arc surface, and the radius of the arc surface is larger than the radius of the process arc formed between the dovetail 1012 and the inner arc surface of the corresponding material block body, so as to improve the connection strength between the material block and the dovetail and provide a space for accommodating the glue solution; the arc surface of the first outer arc surface is not a surface formed by a process arc in the manufacturing process, but is also an artificially designed arc surface, and the radius of the arc surface is larger than that of the process arc surface formed when the first outer arc surface is connected with the first dovetail end surface, so that a larger space for containing glue solution is formed when the first outer arc surface is matched with the base body, and the connection strength is increased.
Preferably, the inclination angle between the first side surface and the top of the dovetail is 30-45 degrees, the arc radius of the first inner arc surface is 0.35-0.5mm, the arc radius of the first outer arc surface is 0.35-0.75 mm, and the length of the first side surface is 1.5-1.8 mm. By adopting the structure, the dovetail on the material layer is matched with the dovetail groove on the base body through the side surface I, so that the contact area between the dovetail and the base body is small, the dovetail and the base body can be easily inserted, meanwhile, the connecting surface of the dovetail and the dovetail groove is increased, more glue solution can be contained in the inner arc surface I, and the bonding is firmer.
The material layer adopting the structure of the utility model is also provided with a matched structure on the base body, the base body 102 comprises a base body 1021, the outer circumferential surface of the base body is provided with a dovetail groove 1022, the length direction of the dovetail groove is the same as the direction of the hole center line of the base body, the dovetail groove is in arc transition connection with the outer circumferential surface of the base body through a second outer arc surface 1024, the corner of the dovetail tail part of the dovetail groove is provided with a second inner arc surface 1023, the second inner arc surface and the second outer arc surface are connected through a second side surface 1025, and the dovetail grooves are arranged on the outer circumference of the base body at intervals and penetrate through two end surfaces of the base body.
The size and the shape of the dovetail on the material layer 101 are matched with those of the dovetail groove on the base body 102, the dovetail is inserted into the dovetail groove, the first excircle cambered surface 1013 of the dovetail is positioned in the second inner cambered surface 1023 of the dovetail, the second excircle cambered surface 1024 of the dovetail is positioned in the first inner cambered surface 1014 of the dovetail, and the dovetail groove is connected with the dovetail in a transition fit or interference fit mode. In the case of interference fit, the gap between the dovetail grooves of the dovetail may be increased by expanding or reducing the size of the dovetail or the dovetail groove by heating or cooling the base body, and the side surface may be fitted.
The width H of the material layer is preferably equal to or less than the width of the outer circumferential surface of the substrate.
In addition, because the material layer adopting the structure of the utility model needs to adopt a splicing mode when the material layer is fixed on the substrate, the matching tolerance between the material layer and the substrate cannot be too large, otherwise, the material layer can generate edge jumping and generate grinding defects, which brings inconvenience for installation.
During the equipment, insert the forked tail in the dovetail, make and align between the material piece, can be placed in the middle for the central line of the outer circumference of base member, at this moment, adopt transition fit or interference fit to connect, also can set up electrically conductive glue solution between forked tail and dovetail, the material piece passes through electrically conductive glue solution adhesive bonding with the base member body, increase the joint strength between the bed of material and base member, strengthen the connection between the two, through gyration experiment and durability experiment, through electrically conductive glue solution adhesive bonding, can guarantee that each material piece and the base member of the bed of material combine firmly in the life cycle, do not have and drop. In the utility model, the novel conductive glue solution is adopted to connect the material layer and the matrix, and a positive-negative communicating channel is established between the material layer and the matrix, so that the material layer and the matrix have conductivity, the material layer is processed by adopting electric spark, the possibility of processing the material layer is provided, the groove shape on the outer circumferential surface of the chamfer grinding wheel is processed and formed by electric spark equipment, and the processing guarantee is provided for realizing the structure.
Gaps may be provided between adjacent blocks, which gaps form cooling and chip pockets 1017 for the flow of cooling fluid and for the accommodation of grinding chips.
The material layer is formed by adopting split material blocks, so that the internal stress of the material layer is eliminated; after the chamfering grinding wheel is repaired and used for many times, although the material layer is thinner and thinner, the self binding force is smaller and smaller, but no internal stress exists, so that the situation that the material layer is locally deformed and even cracked can not occur, and the safety use performance of the grinding tool is improved. In addition, the material block is provided with the first inner arc surface and the first outer arc surface, so that the matching surface of the material layer and the base body is the first side surface, and the corresponding parts of the first inner arc surface and the first outer arc surface are empty or filled with glue solution, therefore, when heat is generated in the grinding process, the first inner arc surface and the first outer arc surface provide telescopic space for thermal expansion, and stress cannot be generated between the base body and the material layer due to the thermal expansion.
The chamfer grinding wheel is characterized in that a chamfer groove 1018 is formed in the outer circumferential surface of the chamfer grinding wheel, the cross section of the chamfer groove is one of a V shape, a U shape, a trapezoid shape and an arc shape, more than two chamfer grooves can be formed in the outer circumferential surface of the base body, and when more than two chamfer grooves are formed, the groove types of the chamfer grooves can be the same or different, for example, one chamfer groove is a U-shaped groove, and the other chamfer groove can be one of a V shape, a U shape, a trapezoid shape and an arc shape.
The specific examples are merely illustrative of the utility model and are not intended to be limiting.
In the utility model, experiments prove that the connection strength between the dovetail and the inner arc surface of the material block can be obviously increased by increasing the arc radius of the first inner arc surface. The specific experimental procedures and structures are shown below.
The test method comprises the following steps:
the device for the test comprises a fixing seat 1, a tilting rod 2 and a weight 3, wherein the arc surface 4 is arranged on the upper surface of the fixing seat, the radian of the arc surface 4 is consistent with that of the outer arc surface of a material block, the material block with a dovetail is arranged on the fixing seat and connected together through bonding or connected together through binding, the tilting rod 2 is a rod-shaped part, one end of the tilting rod is an arc tip end 5 and can stretch into the space between the dovetail and the material block, the edge of the material block is used as a fulcrum, the arc tip end 5 of the tilting rod is inserted into an inner arc surface 1014, the weight 3 is hung at the other end of the rod, and the force of breaking the material layer at the part corresponding to the outer arc surface 1024 of the dovetail is regarded as the connection strength of the dovetail and the inner arc surface of the material block.
In this test, an iron block is used as a weight, and the iron block is weighed in advance and used as the weight.
Claims (7)
1. A material block for a chamfering grinding wheel is arc-shaped, the radius of each material block is equal, each material block is connected end to form an annular material layer, and the material block is characterized in that a dovetail (1012) is arranged on the inner arc surface of each material block, the length direction of the dovetail is arranged along the width direction of the material block, one end of a side surface I (1019) of the dovetail is in smooth transition connection with the inner arc surface of the dovetail through an inner arc surface I (1014), the other end of the dovetail is in smooth transition connection with the tail end surface of the dovetail through an outer arc surface I (1013), the side surface I is used as a matching surface and is matched with the side surface of the dovetail on a base body, the inner arc surface I (1014) is a cavity and is a non-matching surface to provide a thermal expansion space, the outer arc surface I is a non-matching surface to form the cavity with the corresponding surface of the base body, and the arc radius of the inner arc surface I (1014) is larger than the radius of a process arc at the position, the radius of the arc of the first outer arc surface (1013) is larger than that of the process arc at the position.
2. The block for a chamfering grinding wheel according to claim 1, wherein: the angle a between the first side surface and the top end surface of the dovetail is 30-45 degrees.
3. The block for the chamfering grinding wheel according to claim 1 or 2, wherein: the radius of the first inner arc surface is 0.35-0.5mm, the radius of the first outer arc surface is 0.35-0.75 mm, and the length of the first side surface is 1.5-1.8 mm.
4. The block for a chamfering grinding wheel according to claim 1, wherein: the width B of the dovetail is less than the width H of the panel.
5. The block for a chamfering grinding wheel according to claim 1, wherein: the width B of the dovetail is equal to the width H of the panel.
6. The block for a chamfering grinding wheel according to claim 1, wherein: the side surface I is respectively and tangentially connected with the inner arc surface I and the outer arc surface I.
7. The block for a chamfering grinding wheel according to claim 1, wherein: the material block comprises a material block body, wherein the material block body is provided with a material block outer arc surface, the material block outer arc surface is provided with a chamfer groove in the arc direction of the material block body, the section of the chamfer groove is one of V-shaped, U-shaped, ladder-shaped and arc-shaped, and the number of the chamfer grooves is more than one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122105927.XU CN216152133U (en) | 2021-09-02 | 2021-09-02 | Material block for chamfering grinding wheel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122105927.XU CN216152133U (en) | 2021-09-02 | 2021-09-02 | Material block for chamfering grinding wheel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216152133U true CN216152133U (en) | 2022-04-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122105927.XU Active CN216152133U (en) | 2021-09-02 | 2021-09-02 | Material block for chamfering grinding wheel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216152133U (en) |
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2021
- 2021-09-02 CN CN202122105927.XU patent/CN216152133U/en active Active
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