High-precision diamond forming cutter

Abstract

The utility model discloses a high-precision diamond forming cutter which comprises a cutter bar, a cutter head and a cutting edge, the cutter head is fixed at the top of the cutter bar, the cutter head is provided with a welding surface, the cutting edge is fixed on the welding surface, the cutting edge is a single crystal diamond cutter processed by coating diamond micro powder on a cast iron disc with high smoothness, and the cutting edge comprises a forming cutting edge and two circumferential cutting edges. The two circumferential blades are arranged on the two sides of the forming blade respectively, and the cutter bar is provided with a chip groove connected with the fixing groove. According to the single crystal diamond cutter, the cutting edge of the single crystal diamond cutter is adopted, the service life of the cutter is greatly prolonged and the cost of the cutter is reduced due to the excellent wear resistance of a diamond material, the diamond surface is ground by adopting a high-smoothness diamond grinding disc before welding to ensure that no lines exist under 500 times, and after the allowance is removed through laser roughing after welding, the production efficiency is greatly improved. The cast iron disc is coated with the diamond micro-powder to machine the rear tool face to form the blade, the smoothness of the tool face of the blade is greatly improved, the product can directly achieve the highlight mirror surface effect after being milled, then the polishing and grinding procedure is removed, and the productivity is improved.

Description

Technical Field

[0001] The utility model relates to a tool technology, in particular to a high-precision diamond forming tool. Background Art

[0002] The forming milling cutter is mainly used for milling workpieces with a formed contour. At present, the forming processing of the shell of 3C electronic products is mainly carried out by using the corresponding forming contour tool.

[0003] Currently, the cutting tools on the market are basically unable to achieve a high-gloss mirror effect, and there will be processing lines on the surface of the workpiece. Therefore, the traditional process is to first use a milling cutter for milling, and then polish and grind. The process is complicated, the cost is high, the production capacity is low, and the tool life is generally short. Utility Model Content

[0004] In order to solve the defects of the above-mentioned prior art, the utility model provides a high-precision diamond forming tool, which can achieve a high-gloss mirror effect, has a simple process, greatly reduces costs, increases production capacity, and has a long tool life.

[0005] To achieve the above technical objectives, the utility model adopts the following technical solutions: a high-precision diamond forming tool for processing high-gloss mirror products, comprising a tool rod, a tool head and a blade, the tool head being fixed to the top of the tool rod, the tool head being provided with a welding surface, the blade being fixed to the welding surface, the blade being a single crystal diamond knife, the blade comprising a forming blade and two peripheral blades, the two peripheral blades being respectively arranged on both sides of the forming blade, and the tool rod being provided with a chip removal groove connected to a fixing groove.

[0006] Preferably, the knife rod is cylindrical.

[0007] Preferably, the blade is inclined upward by 5 degrees relative to the axis of the blade rod.

[0008] Preferably, the cutter head and the cutter rod are integrally formed.

[0009] Preferably, the profiled edge is recessed toward the cutter head.

[0010] Preferably, a first forming back angle and a second forming back angle are formed on the forming blade, and the first forming back angle is smaller than the second forming back angle.

[0011] Preferably, a peripheral blade first clearance angle and a peripheral blade second clearance angle are formed on the peripheral blade, and the peripheral blade first clearance angle is smaller than the peripheral blade second clearance angle.

[0012] Preferably, a positioning surface is provided on the cutter head, and the positioning surface is in contact with a side of the cutting edge opposite to the forming edge.

[0013] Preferably, the blade is fixed to the welding surface by vacuum welding.

[0014] In summary, the utility model has achieved the following technical effects:

[0015] The high-precision diamond forming tool of the utility model adopts the blade of a single crystal diamond knife. Due to the excellent wear resistance of the diamond material, the life of the tool is greatly improved and the tool cost is reduced. Before welding, a high-finish diamond grinding disc is used to grind the diamond surface to ensure that there is no grain at 500 times. After welding, the excess is removed by laser roughening, and the blade is formed by coating the blade surface with diamond micropowder through a cast iron disc. The blade surface finish is greatly improved, so that the product can directly achieve a high-gloss mirror effect after milling, thereby eliminating the polishing and grinding process, saving costs and improving production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the high-precision diamond forming tool of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the high-precision diamond forming tool of the utility model;

[0018] Explanation of the reference numerals in the accompanying drawings in the specification: 1. tool bar; 2. tool head; 3. welding surface; 4. cutting edge; 5. chip groove; 6. forming edge; 61. forming first clearance angle; 62. forming second clearance angle; 7. peripheral edge; 71. peripheral edge first clearance angle; 72. peripheral edge second clearance angle; 8. positioning surface. DETAILED DESCRIPTION

[0019] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0020] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

[0021] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0025] Embodiment 1:

[0026] like Figure 1 As shown in Figure 2, a high-precision diamond forming tool is used for processing high-gloss mirror products, including a tool bar 1, a tool head 2 and a blade 4. The tool head 2 is fixed to the top of the tool bar 1. The tool head 2 is provided with a welding surface 3. The blade 4 is fixed to the welding surface 3. The blade 4 is a single crystal diamond tool. The blade 4 includes a forming blade 6 and two peripheral blades 7. The two peripheral blades 7 are respectively arranged on both sides of the forming blade 6. The tool bar 1 is provided with a chip removal groove 5 connected to the fixed groove. The tool bar 1 is cylindrical, and the forming blade 6 is recessed toward the tool head 2.

[0027] The blade 4 is tilted upward 5 degrees relative to the axis of the tool bar 1; the welding surface 3 and the blade 4 both adopt a positive 5° bevel structure to increase the sharpness of the cutting edge, reduce cutting resistance, and prevent tool vibration during processing.

[0028] The cutter head 2 and the cutter bar 1 are formed in one piece; the cutter head 2 and the cutter bar 1 formed in one piece improve the strength of the cutter.

[0029] A first forming relief angle 61 and a second forming relief angle 62 are formed on the forming blade 6 , and the first forming relief angle 61 is smaller than the second forming relief angle 62 .

[0030] A first peripheral edge clearance angle 71 and a second peripheral edge clearance angle 72 are formed on the peripheral edge 7 . The first peripheral edge clearance angle 71 is smaller than the second peripheral edge clearance angle 72 .

[0031] The first forming back angle 61, the second forming back angle 62, the first peripheral edge back angle 71 and the second peripheral edge back angle 72 are all roughed by nanosecond laser, leaving a margin of 8um-12um at the forming edge 6, and ensuring that the edge chipping is within 5um, and ensuring that the diamond has no cracks after roughing.

[0032] A positioning surface 8 is provided on the cutter head 2, and the positioning surface 8 is in contact with the side of the blade 4 opposite to the forming blade 6; the setting of the positioning surface 8 can facilitate the blade 4 to move into position, so as to improve the welding accuracy.

[0033] The blade 4 is fixed to the welding surface 3 by vacuum welding; the welding is completed by heating inside the vacuum cavity, and the welding strength can reach 50Mpa, which ensures the rigidity of the tool during processing and ensures that the blade 4 will not fall off.

[0034] Single crystal diamond material is selected as the blade 4, which is welded on the carbide tool bar 1, and then ground and sharpened by applying micro powder on a cast iron disc. Using single crystal diamond as the tool material can make the blade 4 very sharp through grinding, and it is not easy to produce built-up edge and sticking during processing; the friction coefficient is low, the deformation is small during processing, and the cutting force can be reduced; single crystal diamond has extremely high hardness (10000HV), good wear resistance, and the service life is 100 times or even hundreds of times that of carbide tools; and when processing non-ferrous metals, the surface roughness can reach Rz0.1~0.05um, and the shape accuracy of the workpiece being processed is controlled below 50nm to ensure that the product achieves a high-gloss mirror effect.

[0035] The high-precision diamond forming tool of the utility model adopts the blade 4 of the single crystal diamond knife. Due to the excellent wear resistance of the diamond material, the life of the tool is greatly improved and the tool cost is reduced. Before welding, a high-finish diamond grinding disc is used to grind the diamond surface to ensure that there is no grain at 500 times. After welding, the excess is removed by laser roughening, and the blade surface is processed by applying diamond micropowder on the cast iron disc to form the blade 4, which greatly improves the surface finish of the blade 4, so that the product can directly achieve a high-gloss mirror effect after milling, thereby eliminating the polishing and grinding process, saving costs and improving production capacity.

[0036] The above description is only a preferred implementation mode of the present invention, and does not limit the present invention in any form. Any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are within the scope of the technical solution of the present invention.

Claims

1. A high-precision diamond forming tool for processing high-gloss mirror products, characterized in that: It includes a tool rod, a tool head and a blade, wherein the tool head is fixed to the top of the tool rod, the tool head is provided with a welding surface, the blade is fixed to the welding surface, the blade is a single crystal diamond knife processed by a high-finish diamond grinding disc, the blade includes a forming blade and two peripheral blades, the two peripheral blades are respectively arranged on both sides of the forming blade, and the tool rod is provided with a chip removal groove connected to the fixed groove.

2. A high-precision diamond forming tool according to claim 1, characterized in that: The knife bar is cylindrical.

3. A high-precision diamond forming tool according to claim 2, characterized in that: The blade is arranged to be inclined upward by 5 degrees relative to the axis of the blade rod.

4. A high-precision diamond forming tool according to claim 1, characterized in that: The cutter head and the cutter rod are integrally formed.

5. A high-precision diamond forming tool according to claim 1, characterized in that: The profiled edge is recessed toward the cutter head.

6. A high-precision diamond forming tool according to claim 1, characterized in that: The forming blade is formed with a first forming back angle and a second forming back angle, and the first forming back angle is smaller than the second forming back angle.

7. A high-precision diamond forming tool according to claim 1, characterized in that: The peripheral blade is formed with a peripheral blade first clearance angle and a peripheral blade second clearance angle, and the peripheral blade first clearance angle is smaller than the peripheral blade second clearance angle.

8. A high-precision diamond forming tool according to claim 1, characterized in that: The cutter head is provided with a positioning surface, and the positioning surface is in contact with a side of the cutting edge opposite to the forming edge.

9. A high-precision diamond forming tool according to claim 1, characterized in that: The blade is fixed to the welding surface by vacuum welding.

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