Porous diamond grinding tool with extremely-small curved surface manufactured by binder spraying additive material

Abstract

The utility model provides a binder injection additive manufacturing tiny curved surface porous diamond grinding tool, and relates to the technical field of diamond grinding tool manufacturing, the binder injection additive manufacturing tiny curved surface porous diamond grinding tool comprises a grinding tool main body and an assembly workpiece, the whole grinding tool main body is of a hollow structure, and the assembly workpiece assembles the grinding tool main body from the two sides of the grinding tool main body; the grinding tool body comprises the porous structure with the extremely-small curved surface, the permeability and the utilization rate of the porous diamond grinding tool to cooling liquid in the grinding machining process are remarkably improved through the smooth extremely-small curved surface structure with holes highly communicated, the service life of the grinding tool is effectively prolonged, and the grinding machining efficiency of the grinding tool is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to diamond tool manufacturing technical field, in particular to a kind of binder injection additive manufacturing extremely small curved surface porous diamond tool. BACKGROUND

[0002] Diamond tool is generally with metal or resin as binder, diamond abrasive particles are mixed and consolidated, so as to be made into abrasive tool with certain processing grinding capacity.Compared with ordinary corundum tool and emery tool, the high strength and high grinding capacity of diamond tool make it have more significant grinding efficiency, can easily complete the processing and polishing of hard and brittle materials such as hard alloy, optical glass and engineering ceramics, and the service life of the tool is long.

[0003] However, in actual high-speed grinding process, the contact surface of grinding zone of workpiece and tool often produces more serious grinding heat phenomenon.These grinding heat can seriously affect the processing surface of workpiece, and also has great negative influence on grinding effect, and in serious case, it can also significantly reduce the use stability and service life of diamond tool.Under this condition, it is particularly important to effectively improve the heat dissipation capacity and cooling liquid guiding efficiency of diamond tool. SUMMARY

[0004] The utility model discloses a kind of binder injection additive manufacturing extremely small curved surface porous diamond tool to solve the grinding heat phenomenon generated by above-mentioned diamond tool, can significantly improve the heat dissipation capacity of diamond tool, solve the problem of affecting workpiece grinding efficiency.

[0005] The binder injection additive manufacturing extremely small curved surface porous diamond tool provided by the utility model includes: tool main body, the tool main body is overall hollow structure, the tool main body includes the porous structure with extremely small curved surface, the tool main body is obtained by binder injection additive manufacturing to diamond powder.

[0006] The hollow structure is on one hand convenient for tool heat dissipation, on the other hand convenient for being assembled by assembly workpiece.

[0007] Preferably, the hollow structure includes annular.

[0008] Preferably, the binder injection additive manufacturing extremely small curved surface porous diamond tool further includes assembly workpiece, and the assembly workpiece is assembled to the tool main body from at least one side of the tool main body.

[0009] Preferably, the tool main body has periodic extremely small curved surface structure formed by extremely small curved surface structure unit along long, wide, high three directions array operation.

[0010] Further, the function expression of the minimal surface structure unit is as follows:

[0011] ;

[0012] Wherein, l is the minimal surface structure unit size, x, y, z respectively correspond to the coordinate position points of the minimal surface structure unit in the three-dimensional physical space.

[0013] The minimal surface structure unit is usually designed based on the cubic structure, and the length, width and height of the structure unit adopt consistent sizes, i.e. the minimal surface structure unit size.

[0014] Further preferably, the minimal surface structure unit size l is 2-20 mm.

[0015] Further preferably, the unit volume ratio of the minimal surface structure unit is 15-45%.

[0016] The unit volume ratio of the minimal surface structure unit can be understood as the ratio of the volume of the minimal surface structure unit and the volume of the solid cube corresponding to the minimal surface structure unit size.

[0017] Preferably, the assembly workpiece comprises at least one pair of flanges, at least one fastener, and the flanges are assembled to the grinding tool body from both sides of the grinding tool body and are fixed through the fastener.

[0018] Preferably, the rotation direction of the grinding tool body is clockwise.

[0019] Optionally, the grinding tool body is in a whole cylindrical shape.

[0020] Compared with the prior art, the excellent effects of the utility model are:

[0021] The grinding tool body of the utility model adopts the minimal surface porous structure, has the smooth curved surface with the hole height communication, the structure has good fluid permeability to the cooling liquid, and the cooling effect of the cooling liquid on the grinding area can be improved in the grinding process, and the utilization rate of the cooling liquid is improved.

[0022] By matching the different minimal surface structure unit sizes and unit volume ratios, the overall porosity of the porous diamond grinding tool can be controlled, and the fluid permeability of the cooling liquid can be better grasped.

[0023] The porous diamond grinding tool of the utility model is prepared by the known binder spraying additive manufacturing technology, can be applied to the preparation scenes of the metal binder and the resin binder diamond grinding tool, and has wide application.

[0024] The grinding tool main body is assembled by the assembling workpiece, the corresponding porous diamond grinding tool can be replaced in real time according to the actual machining workpiece working condition, and therefore the grinding tool use efficiency is effectively improved and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is the three-dimensional structure schematic diagram of the utility model;

[0026] Figure 2 is the grinding tool main body structure schematic diagram of the utility model;

[0027] Figure 3 is the assembling schematic diagram of the utility model;

[0028] Figure 4 is the effect diagram of the minimal surface structure unit of the utility model;

[0029] Figure 5 Corresponding solid cubes of the minimal surface structure unit size are shown.

[0030] In the drawing: 1-grinding tool main body; 2-flange plate; 3-assembling shaft; 4-fastening nut; 11-minimal surface structure unit. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model will be further described below in combination with the drawings.It is understood that the embodiments described in the utility model are only a part of the embodiments of the utility model, not all the embodiments.Based on the embodiments in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the protection scope of the utility model.

[0032] Embodiment 1

[0033] Please refer to Figures 1 to 3 A kind of binder injection additive manufacturing minimal surface porous diamond grinding tool, including grinding tool main body 1 and assembling workpiece, the assembling workpiece includes a pair of flange plate 2, a plurality of assembling shafts 3 and fastening nut 4 matched with the assembling shaft 3, the grinding tool main body 1 is porous diamond grinding tool main body, the grinding tool main body 1 is hollow structure;The flange plate 2 is assembled to the grinding tool main body from the two sides of the grinding tool main body 1, is fixed by assembling shaft 3 and fastening nut 4.

[0034] Please refer to Figures 1 to 4The abrasive tool body comprises a porous structure with a minimal surface, and the abrasive tool body is obtained by binder jet additive manufacturing of diamond powder. The binder jet additive manufacturing of diamond powder is a conventional manufacturing method, and the binder jet printing, curing, debinding, sintering or infiltration process can be performed by using a known resin binder, and the infiltration metal comprises a known copper-tin alloy. The porous diamond abrasive tool in the embodiment is a copper-tin alloy-based diamond abrasive tool, and the grinding processing object is a cemented carbide workpiece.

[0035] With reference to Figures 1 to 3 , the abrasive tool body adopts a hollow structure, which refers to a through hole provided in the abrasive tool body without considering the porous structure of the abrasive tool body, such as the annular structure in Figure 2 .

[0036] The hollow structure is beneficial to heat dissipation of the abrasive tool and assembly of the workpiece.

[0037] With reference to Figure 3 , the assembly workpiece comprises a pair of flanges 2, an assembly shaft 3 and a fastening nut 4 matched with the assembly shaft 3, the flanges 2 are respectively arranged on two sides of the abrasive tool body 1 to assemble the abrasive tool body, and the flanges 2 are fixed by the fastening nut 4.

[0038] The assembly shaft 3 can be a screw rod, a bolt, a pin shaft or the like. When the assembly shaft 3 is a pin shaft, the assembly nut 4 can also be replaced by other limiting components.

[0039] With reference to Figure 2 and Figure 4 , the abrasive tool body is combined and spliced by periodic array operation of the minimal surface structure units 11 in x, y and z directions.

[0040] In the embodiment, the function expression of the minimal surface structure unit 11 is as follows:

[0041] ;

[0042] Wherein, l is the size of the minimal surface structure unit, x, y and z respectively correspond to the coordinate position points of the minimal surface structure unit in the three-dimensional physical space. When the function f=0, the function surface of the minimal surface structure unit is obtained.

[0043] The minimal surface structure unit is usually designed based on a cubic structure, and the length, width and height of the structure unit are all uniform, that is, the size of the minimal surface structure unit. In the embodiment, the size of the minimal surface structure unit l is 10 mm.

[0044] As Figure 4The minimum curved surface structure unit has a smooth curved surface with hole height communication, the structure has good fluid permeability to cooling liquid, the cooling effect of the cooling liquid on the grinding area can be improved in the grinding process, and the utilization rate of the cooling liquid is improved.

[0045] The unit volume ratio of the minimum curved surface structure unit 11 is 15-45%; as described above, the minimum curved surface structure unit is usually designed based on a cubic structure, and the unit volume ratio V of the minimum curved surface structure unit is R It can be understood that the volume V of the minimum curved surface structure unit p And the volume V of the solid cube corresponding to the size of the minimum curved surface structure unit s The ratio of the two, that is, The porosity of the unit structure .

[0046] As described in the embodiment, the unit volume ratio of the minimum curved surface structure unit is 30%, and the corresponding porosity is 70%.

[0047] In the embodiment, when the rotation direction of the porous diamond grinding tool body is clockwise, the grinding tool body has good fluid permeability and utilization rate to the cooling liquid.

[0048] Embodiment 2

[0049] The minimum curved surface structure unit of the utility model can also form a cylindrical grinding tool body or a grinding tool body of other shapes by periodic array along the x, y and z directions in addition to the hollow structure of the grinding tool body. When the grinding tool body is cylindrical, the assembly workpiece is adjusted accordingly, for example, the assembly workpiece is assembled on one side of the grinding tool body.

[0050] The minimum curved surface structure unit has a smooth curved surface with hole height communication, that is, even if it is manufactured in a cylindrical shape, it still has good fluid permeability to the cooling liquid.

[0051] Embodiments 1 and 2 can adjust the assembly direction of the grinding tool body to adapt to the rotation direction of the grinding tool body, so that the grinding tool body has good fluid permeability and utilization rate to the cooling liquid in the rotation direction.

[0052] The above is only a preferred embodiment of the utility model, and it should be noted that any modification, equivalent replacement, improvement and modification made by those skilled in the art without departing from the principle of the utility model still falls within the protection scope of the utility model.

Claims

1. A binder-jet additive manufacturing method for extremely small curved porous diamond abrasives, characterized in that: The invention includes a grinding wheel body, which has a hollow structure and includes a porous structure with extremely small curved surfaces. The grinding wheel body is obtained by additive manufacturing of diamond powder by binder spraying.

2. The binder-jet additive manufacturing method for extremely small curved porous diamond abrasives according to claim 1, characterized in that: It also includes an assembly workpiece, which assembles the mold body from at least one side of the mold body.

3. The binder-jet additive manufacturing method for extremely small curved porous diamond abrasives according to claim 1, characterized in that: The hollow structure includes a ring shape.

4. The binder-jet additive manufacturing method for extremely small curved porous diamond abrasives according to claim 1, characterized in that: The main body of the grinding wheel has a periodic minimal surface structure formed by arraying minimal surface structural units along the length, width, and height directions using Boolean operations.

5. The binder-jet additive manufacturing method for extremely small curved porous diamond abrasives according to claim 4, characterized in that: The model equation expression for the minimal surface structural element is as follows: ； Where l is the size of the minimal surface structural unit, and x, y, z correspond to the coordinate positions of the minimal surface structural unit in three-dimensional physical space.

6. The binder-jet additive manufacturing method for extremely small curved porous diamond abrasives according to claim 5, characterized in that: The size l of the extremely small curved surface structural unit is 2-20 mm.

7. The binder-jet additive manufacturing method for extremely small curved porous diamond abrasives according to claim 5, characterized in that: The unit volume ratio of the extremely small curved surface structural unit is 15-45%.

8. The binder-jet additive manufacturing method for extremely small curved porous diamond abrasives according to claim 2, characterized in that: The assembly workpiece includes at least one pair of flanges and at least one fastener. The flanges are assembled onto the grinding body from both sides of the grinding body and fixed by the fasteners.

9. The binder-jet additive manufacturing method for extremely small curved porous diamond abrasives according to claim 5, characterized in that: The main body of the grinding tool rotates clockwise.

10. The binder-jet additive manufacturing method for extremely small curved porous diamond abrasives according to claim 5, characterized in that: The main body of the grinding tool is cylindrical in shape.

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