A processing method of diamond reamer

Abstract

The present invention provides a method for processing a diamond reamer, comprising the following steps: A. preparing a carbide arbor and a diamond sheet; B. processing the diamond sheet to form a diamond cylinder; C. processing the side surfaces of the diamond cylinder and the carbide arbor to form a welding surface; D. welding the welding surface on the diamond cylinder to the welding surface on the carbide arbor by vacuum welding; E. roughly grinding one end of the hard diamond arbor close to the diamond cylinder to form a arbor having a welding base, a first avoidance chamfer, a first avoidance section and a second avoidance chamfer connected in sequence; F. using numerical control electric spark machining of the diamond cylinder, the welding base, the first avoidance chamfer and the first avoidance section to form a first tool body having a chip removal groove; G. finely grinding the side surface of the diamond cylinder on the first tool body to form a second tool body having a peripheral blade; H. finely grinding the peripheral blade and the first back face of the peripheral blade to form a diamond reamer. The present invention solves the problem that the existing diamond reamer with a diameter of 2-4 mm has a short life due to low strength.

Description

[Technical field]

[0001] The invention relates to the technical field of cutting tools, in particular to a method for processing a diamond reamer. [Background technology]

[0002] At present, the existing ultra-small diameter reamers with a diameter of 2-4mm are generally made of cemented carbide. Because traditional diamond tools generally use cemented carbide tool bars as the base, and weld diamond blades on the base by slotting, so as to fix the diamond blades and form diamond tools. However, in this way, the tool bar is prone to adding slots as the number of blades increases, which in turn leads to a decrease in the volume of the slots, resulting in a decrease in the welding surface between the diamond tool and the base, and increasing the difficulty of diamond welding, which in turn affects the stability of the diamond tool, resulting in a short lifespan, and even cannot be effectively mass-produced and produced as the number of blades increases. For this reason, compared with cemented carbide reamers, there are not many advantages.

[0003] Therefore, the existing technology needs to be improved and developed. [Summary of the invention]

[0004] The purpose of the present invention is to provide a method for processing a diamond reamer, which is used to solve the problem that the existing diamond reamer with a diameter of 2-4 mm has low strength and short life.

[0005] The technical solution of the present invention is as follows:

[0006] On the one hand, an embodiment of the present invention provides a diamond reamer, comprising a shank base and a diamond tool body welded to the shank base, wherein the shank base is a avoidance section at one end close to the diamond tool body, and the diamond tool body is provided with a plurality of chip grooves, and the chip grooves extend toward the avoidance section; a peripheral blade is formed on the diamond tool body, and the angle between the first back surface of the peripheral blade and the axial plane is a.

[0007] Furthermore, the blade diameter of the peripheral blade is 2-4 mm.

[0008] Furthermore, the peripheral blade is an arc surface, and its blade width is 0.2±0.02mm.

[0009] Furthermore, the avoidance section comprises a welding base, a first avoidance chamfer, a first avoidance section and a second avoidance chamfer which are connected in sequence, and the welding base is welded to the diamond tool body at one end away from the first avoidance chamfer.

[0010] Furthermore, a chamfering edge is provided on the first avoidance chamfer, and the chamfering edge intersects with an extension line of the peripheral edge.

[0011] Furthermore, the diamond cutter body is also formed with: a planar bottom edge and a third chamfer connecting the bottom edge and the peripheral edge.

[0012] On the other hand, the present invention also provides a method for processing a diamond reamer, comprising the steps of:

[0013] A. Prepare carbide shanks and diamond sheets;

[0014] B. Processing diamond sheets to form diamond cylinders with a diameter of 2-4 mm;

[0015] C. Processing the diamond cylinder and one side of the carbide tool bar to form a welding surface;

[0016] D. Vacuum weld the welding surface on the diamond cylinder to the welding surface on the carbide shank;

[0017] E. Roughly grinding one end of the hard diamond tool rod close to the diamond cylinder to form a tool rod having a welding base, a first avoidance chamfer, a first avoidance section and a second avoidance chamfer connected in sequence;

[0018] F. Forming a first cutter body with a chip removal groove by using CNC electric spark machining of a diamond cylinder, a welding base, a first avoidance chamfer and a first avoidance section;

[0019] G. Fine grinding the side surface of the diamond cylinder on the first cutter body to form a second cutter body with a peripheral edge;

[0020] H. Finely grind the peripheral blade and the first flank surface of the peripheral blade to form a diamond reamer, wherein the diamond reamer includes a tool rod and a diamond tool body, the peripheral blade on the diamond tool body is an arc surface, the blade width of the peripheral blade on the diamond tool body is 0.2±0.02mm, the blade diameter on the diamond tool body is 2-4mm, and the angle between the first flank surface on the diamond tool body and the axial plane is 25°.

[0021] Furthermore, the processing method further comprises, after step E:

[0022] The outer side walls of the diamond cylinder and the welding base are machined by CNC electric spark machining to form the diamond cylinder and the welding base with runout less than 0.005 mm and concentricity less than 0.005 mm.

[0023] Furthermore, the processing method further comprises, after step G:

[0024] The first avoidance chamfer on the second tool body is processed to form a chamfering edge.

[0025] Furthermore, the processing method further comprises, before step h: fine grinding the top surface of the diamond cylinder on the second tool body to form a planar bottom edge and a third chamfer between the bottom edge and the peripheral edge.

[0026] The beneficial effect of the present invention is that compared with the prior art, the present invention directly uses the diamond cutter body as the cutting head, and directly opens the chip groove and processes the peripheral edge on the diamond cutter body, thereby abandoning the traditional slotting welding piece process, improving the processing and production efficiency of the diamond reamer, and effectively improving the strength of the tool and the service life. In addition, according to user needs, the diamond reamer can have a smaller blade diameter and can open more peripheral edges to meet user needs.

Brief Description of the Drawings

[0027] Figure 1 It is a stereoscopic view of a diamond reamer of the present invention.

[0028] Figure 2 It is a stereoscopic view of the diamond reamer of the present invention from another viewing angle.

[0029] Figure 3 It is a side view of the diamond reamer of the present invention.

[0030] Figure 4 It is a top view of the diamond knife body of the present invention.

[0031] Figure 5 The figure is a flow chart of the diamond reamer processing method of the present invention. [Specific implementation method]

[0032] The present invention will be further described below in conjunction with the accompanying drawings and implementation modes.

[0033] Please refer to the attached Figure 1-4 , a diamond reamer in an embodiment of the present invention.

[0034] The diamond reamer comprises a tool bar base 10 and a diamond tool body 20 welded to the tool bar base 10. The tool bar base 10 is provided with a relief section 15 at one end close to the diamond tool body 20. The diamond tool body 20 is provided with a plurality of chip removal grooves 21, which extend toward the relief section 15. A peripheral blade 23 is formed on the diamond tool body 20, and an angle a is formed between a first back face 22 of the peripheral blade 23 and the axial plane.

[0035] The diamond reamer of the present invention directly uses the diamond tool body 20 as the cutting tool head, and processes the peripheral blade 23 and the chip groove 21 on the diamond tool body 20, thereby solving the problem that the existing ultra-small diameter diamond tool needs to slot and weld the diamond blade on the hard tool rod, resulting in a small blade welding surface and a short tool life. This can effectively solve the problem that the diamond blade is difficult to weld, and effectively improve the strength of the tool and effectively improve the service life. In addition, according to user needs, the diamond reamer can have a smaller blade diameter and can open more peripheral blades 23 to meet user needs.

[0036] Specifically, in this embodiment, the blade diameter of the peripheral blade 23 of the diamond reamer can be made 2-4 mm during processing, which satisfies the existing processing of ultra-small holes.

[0037] In one embodiment, the peripheral blade 23 is an arc surface, and its blade width is 0.2±0.02 mm. The cross section of the arc surface is an arc with a radius of 1.5 mm. The peripheral blade 23 is convenient for fine machining of holes, and a higher precision machining surface can be obtained.

[0038] In one embodiment, in order to improve the overall strength of the diamond reamer and facilitate the processing of the diamond tool body 20, the avoidance section 15 includes a welding base 14, a first avoidance chamfer 13, a first avoidance section 12 and a second avoidance chamfer 11 connected in sequence, and the welding base 14 is welded to the diamond tool body 20 at one end away from the first avoidance chamfer 13.

[0039] In one embodiment, a chamfering edge 16 is provided on the first avoidance chamfer 13, and the chamfering edge 16 intersects with the extension line of the peripheral edge 23. The chamfering edge 16 can facilitate the user to process the chamfer, thereby improving the practicality of the diamond reamer of the present invention.

[0040] In one embodiment, in order to improve the strength of the diamond reamer of the present invention, the diamond tool body 20 is further formed with: a planar bottom edge 25, and a third chamfer 24 connecting the bottom edge 25 and the peripheral edge 23. The angle between the third chamfer 24 and the radial plane is 15°, and the angle between the first back face 22 of the peripheral edge 23 and the axial plane is 25°. In addition, there are 4 chip grooves 21, which are evenly distributed, and the chip grooves 21 are located between the two peripheral edges 23 to facilitate production and processing.

[0041] Please refer to the attached Figure 5 The present invention also provides a method for processing the diamond reamer, comprising the steps of:

[0042] A. Prepare the carbide shank and diamond sheet. The thickness of the diamond sheet is 6mm, the diameter of the carbide shank is 6mm, and the material of the carbide shank is tungsten steel.

[0043] B. Use a wire cutting machine to process diamond sheets to form diamond cylinders.

[0044] C. Use a surface grinder to process one side of the diamond cylinder and the carbide tool rod to form a welding surface to ensure that the welding surface of the diamond cylinder and the welding surface of the carbide tool rod are smooth and bright, to ensure that they can be better connected together during welding, and there are no welds or bubbles that affect the welding strength.

[0045] D. Pre-bond the welding surface of the diamond cylinder and the welding surface of the carbide shank with flux, and then vacuum weld them together. Specifically, the vacuum welding temperature is 760 degrees Celsius and the welding time is 90 minutes to prevent the occurrence of cold welding.

[0046] E. Roughly grind the hard diamond tool rod near one end of the diamond cylinder to form a tool rod base 10 having a welding base 14, a first avoidance chamfer 13, a first avoidance section 12 and a second avoidance chamfer 11 connected in sequence, so as to avoid air space for subsequent opening of the chip groove 21 and processing of the diamond cylinder to prevent affecting the processing.

[0047] F. Using CNC electric spark machining, a diamond cylinder, a welding base 14, a first avoidance chamfer 13 and a first avoidance section 12 are formed into a first tool body having a chip removal groove 21. The core thickness of the diamond cylinder in the first tool body has a diameter of 1.5 mm, the length of the chip removal groove 21 is 12 mm, and the opening angle of the chip removal groove 21 is 90°.

[0048] G. Fine grinding the side surface of the diamond cylinder on the first cutter body to form a second cutter body with a peripheral edge 23, thereby controlling the runout and concentricity between the diamond cylinder and the cutter bar to within 0.003 mm, so as to improve the precision of diamond processing of the present invention.

[0049] H, fine grinding the peripheral cutting edge 23 and the first flank face 22 of the peripheral cutting edge 23 to form a diamond reamer 10, wherein the peripheral cutting edge 23 on the diamond tool body 20 is an arc surface with a radius of 1.5 mm, the blade width of the peripheral cutting edge 23 on the diamond tool body 20 is 0.2±0.02 mm, the blade diameter on the diamond tool body 20 is 2-4 mm, and the angle between the first flank face 22 on the diamond tool body 20 and the axial plane is 25°.

[0050] The present invention directly welds the diamond cylinder to the cemented carbide tool bar, then opens the chip groove 21 and processes the peripheral blade 23, thereby discarding the traditional slotted welding sheet process, saving the tedious operation of pre-fixing the diamond sheets to the chip groove 21 one by one through the flux, and improving the processing and production efficiency of the diamond reamer. It also effectively improves the strength of the diamond reamer and increases the service life. It can also achieve a blade diameter of 2-4mm for the diamond reamer, and can open more peripheral blades 23 according to user needs to meet user needs.

[0051] Specifically, in one embodiment, the processing method further comprises after step E: E1, using CNC electric spark machining to process the outer wall of the diamond cylinder and the welding base 14, so as to form a diamond cylinder and the welding base 14 with a runout less than 0.005 mm and a concentricity less than 0.005 mm. High-precision runout and concentricity can ensure the accuracy of subsequent processing dimensions.

[0052] In one embodiment, the processing method further comprises, after step G: G1, processing the first avoidance chamfer 13 on the second tool body to form a chamfering edge 16, so as to improve the practicality of the diamond reamer of the present invention.

[0053] In one embodiment, to improve the strength of the diamond reamer of the present invention, the processing method further includes before step h: G2, fine grinding the top surface of the diamond cylinder on the second tool body to form a planar bottom edge 25 and a third chamfer 24 between the bottom edge 25 and the peripheral edge 23.

[0054] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A method for processing a diamond reamer, characterized in that: Includes steps: A. Prepare carbide shanks and diamond sheets; B. Processing diamond sheets to form diamond cylinders; C. Processing the diamond cylinder and one side of the carbide tool bar to form a welding surface; D. Vacuum weld the welding surface on the diamond cylinder to the welding surface on the carbide shank; E. Roughly grinding one end of the hard diamond tool rod close to the diamond cylinder to form a tool rod having a welding base, a first avoidance chamfer, a first avoidance section and a second avoidance chamfer connected in sequence; F. Forming a first cutter body with a chip removal groove by using CNC electric spark machining of a diamond cylinder, a welding base, a first avoidance chamfer and a first avoidance section; G. Fine grinding the side surface of the diamond cylinder on the first cutter body to form a second cutter body with a peripheral edge; H. Finely grind the peripheral blade and the first flank surface of the peripheral blade to form a diamond reamer, wherein the diamond reamer includes a tool rod and a diamond tool body, the peripheral blade on the diamond tool body is an arc surface, the blade width of the peripheral blade on the diamond tool body is 0.2±0.02mm, the blade diameter on the diamond tool body is 2-4mm, and the angle between the first flank surface on the diamond tool body and the axial plane is 25°.

2. The processing method according to claim 1, characterized in that: The processing method further comprises after step E: The outer side walls of the diamond cylinder and the welding base are machined by CNC electric spark machining to form the diamond cylinder and the welding base with runout less than 0.005 mm and concentricity less than 0.005 mm.

3. The processing method according to claim 2, characterized in that: The processing method further comprises after step G: The first avoidance chamfer on the second tool body is processed to form a chamfering edge.

4. The processing method according to claim 3, characterized in that: The processing method further comprises, before step H: fine grinding the top surface of the diamond cylinder on the second tool body to form a planar bottom edge and a third chamfer between the bottom edge and the peripheral edge.

Images