PCD cutter replacing boring cutter

Abstract

The PCD cutter replacing the boring cutter comprises a first section blade, a second section blade, a third section blade, a fourth section blade, and the first section blade is provided with a smooth cutting edge formed through laser cutting; the second section blade, the third section blade and the fourth section blade are respectively provided with a linear cutting zigzag cutting edge; the first section PCD cutter blade is applied to rough machining of holes without requirements on the surface roughness of products; the second section blade is arranged in a hole finish machining reverse chamfering area of the PCD cutter; the third section blade is arranged in a hole finish machining area of the PCD cutter; the fourth section blade is arranged in a hole inlet finish machining chamfering area of the PCD cutter; the second section blade is a hole finish machining reverse chamfer; the third section blade is used for hole finish machining; and the fourth section blade is used for finish machining and chamfering of a hole inlet. The surface roughness of a machined product is not controlled by cutter feeding F parameters, the risk of machining waste products is reduced, the cutter is made of PCD materials, a plunge milling mode is adopted for machining, and the cutter is suitable for machining workpieces with various diameters.

Description

Technical Field

[0001] The utility model belongs to the technical field of mechanical processing and relates to a PCD tool replacing a boring tool, and is particularly suitable for boring hole processing. Background Art

[0002] Surface roughness refers to the unevenness of the machined surface with small spacing and tiny peaks and valleys. The distance (wave distance) between two peaks or two valleys is very small, less than 1mm; it belongs to the microscopic geometric shape error.

[0003] At present, the surface roughness control of the products processed by the machining center is adjusted and controlled by the feed F parameter of the boring cutter blade. Due to the difference in surface roughness, the feed F parameter is different; the surface roughness of different parts of the products processed by the machining center is different, the blade wears quickly, and the feed F parameter of the boring cutter blade needs to be frequently adjusted and controlled. Since the machining center cannot functionally adjust the boring hole diameter, each boring bar must have a fine-tuning mechanism. During fine machining, a fine-tuning mechanism with micron-level (μm) adjustment capability must be provided according to the hole diameter tolerance, which results in high boring tool costs.

[0004] During boring tool processing, the tool rotates and cuts continuously. During the processing, the condition of the tool tip cannot be observed, so the cutting amount cannot be adjusted accordingly. In order to ensure the requirements of product size and surface roughness, the method of increasing the frequency of inspection is usually adopted for monitoring. During processing, it is necessary to increase the frequency of inspection, increase the frequency of tool adjustment, and increase the frequency of tool change, which is time-consuming and labor-intensive, resulting in an increase in processing cycle and affecting production efficiency.

[0005] Since boring cutter blades wear quickly, they are prone to wear and breakage, which reduces the dimensional accuracy of hole processing and increases the surface roughness value. The average blade life is 5,000, and the adjuster needs to adjust the diameter or replace the blade frequently. Misoperation by the adjuster can easily lead to batch scrap. Summary of the invention

[0006] The utility model discloses a PCD tool replacing a boring tool, so as to solve the problems in the prior art of adjusting and controlling the feed F parameter of the boring tool blade during processing, which requires increasing the detection frequency, increasing the tool adjustment frequency, and increasing the tool change frequency, which is time-consuming and labor-intensive, leads to an increase in the processing cycle, affects production efficiency, and easily leads to the problem of batch waste.

[0007] PCD tools are polycrystalline diamond tools.

[0008] The utility model tool comprises a blade with a wire-cutting sawtooth cutting edge, wherein the wire-cutting sawtooth spacing and depth of the blade edge are proportional to the surface roughness requirement RZ value of the product to be processed; the greater the surface roughness requirement RZ value of the product to be processed, the greater the wire-cutting sawtooth spacing and depth of the blade edge.

[0009] The utility model tool comprises a first section blade, a second section blade, a third section blade and a fourth section blade. The cutting spacing and depth are adjusted according to the surface roughness, so that a sawtooth shape is generated on the blade. The first section blade has a smooth cutting edge formed by laser cutting, and the first section of the boring product has no requirement for the roughness of the hole to be processed; the second section blade, the third section blade and the fourth section blade are formed by laser cutting and then wire cutting; the second section blade, the third section blade and the fourth section blade all have a wire cutting sawtooth cutting edge. Different sawtooth shapes correspond to different surface roughnesses, so that one tool can meet the requirements of different surface roughnesses. The first section of the PCD tool blade is used for rough machining of holes without requirements on product surface roughness; the second section of the blade is arranged in the hole finishing and counter-chamfering area of ​​the PCD tool; the third section of the blade is arranged in the hole finishing area of ​​the PCD tool; the fourth section of the blade is arranged in the hole entrance finishing chamfering area of ​​the PCD tool; the second section of the blade is for hole finishing and counter-chamfering; the third section of the blade is for hole finishing; the fourth section of the blade is for hole entrance finishing chamfering.

[0010] The surface roughness requirements of the second and fourth section products of the utility model tool are RZ10, and the surface roughness requirements of the third section products are RZ20-RZ25. The spacing and depth of the sawtooth shape of the wire cutting edge of the blade cutting edge are adjusted according to the surface roughness. The sawtooth spacing and depth of the wire cutting sawtooth shape of the blade cutting edge of the second and fourth section blades are smaller than the sawtooth spacing and depth of the wire cutting sawtooth shape of the blade cutting edge of the third section. The machining surface roughness requirements of the RZ10 section blade cutting edge wire cutting sawtooth shape are small, and the machining roughness requirements of the RZ20-RZ25 section blade cutting edge wire cutting sawtooth shape are large.

[0011] The positive effects of the utility model are: the surface roughness of the processed product is not controlled by the tool feed F parameter, and the risk of processing waste is reduced. This tool is made of PCD material, and the processing adopts the plunge milling method, which is suitable for various diameters. The tool is wear-resistant, with an average life of 100,000, and the tool life is greatly increased; there is no need to frequently adjust the tool diameter or adjust the feed F parameter; the risk of waste can be reduced; there is no need to increase the frequency of inspection and reduce the frequency of tool change. Under the premise of ensuring quality, the workload of adjustment personnel is reduced and production efficiency is improved. It is suitable for use in situations where the surface roughness of products in the machining center has different requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model;

[0013] Figure 2 This is a schematic diagram of the enlarged structure of the blade of the utility model;

[0014] Figure 3 This is a schematic diagram of the spacing and depth of the sawtooth shape of the blade edge of the utility model;

[0015] In the figure: 1 first segment blade, 2 second segment blade, 3 third segment blade, 4 third segment blade, S sawtooth spacing, Z depth. DETAILED DESCRIPTION

[0016] An embodiment of the present utility model is described in detail below with reference to the accompanying drawings.

[0017] The holes to be processed in the product are divided into four sections, and different sections require different surface roughness. The first section has no requirements for the surface roughness of the product. The second section is the hole finishing section with a surface roughness requirement of RZ10 and a reverse chamfering section. The third section is the hole finishing section with a surface roughness requirement of RZ20-RZ25. The fourth section is the hole entrance chamfer finishing section with a surface roughness requirement of RZ10.

[0018] The utility model is implemented as follows Figure 2 , Figure 3 As shown, it includes a first section blade 1, a second section blade 2, a third section blade 3, and a fourth section blade 4. The first section blade 1 is formed by laser cutting, and has a smooth cutting edge. It is the first section where the roughness of the boring product hole to be processed is not required; the second section blade 2, the third section blade 3, and the fourth section blade 4 are formed by laser cutting and then wire cutting; the second section blade 2, the third section blade 3, and the fourth section blade 4 all have a wire cutting serrated cutting edge; the surface roughness requirement of the second section product and the fourth section product is RZ10, and a small serrated cutting edge is formed by wire cutting; the surface roughness requirement of the third section product is RZ20-RZ25, and a large serrated cutting edge is formed by wire cutting. The spacing and depth of the cutting are adjusted according to the surface roughness, so that a serrated shape is generated on the blade. Different serrated shapes correspond to different surface roughnesses, so that a tool meets different surface roughness requirements. The first section of the PCD tool blade is used for rough machining of holes without requirements on product surface roughness; the second section of the blade is used for finishing and reverse chamfering of holes; the third section of the blade is used for finishing of holes; and the fourth section of the blade is used for finishing and chamfering of hole entrances.

[0019] The sawtooth spacing S and depth Z of the blade edge are proportional to the surface roughness requirement RZ value of the product to be processed.

[0020] Since the surface roughness requirements of different processed product shapes are different, the cutting parameters are adjusted according to the surface roughness requirements of the product, so that the processed product can meet the surface roughness requirements without adjusting the feed F parameter. After production verification, this tool is suitable for mass production.

[0021] The tool blade of the utility model is made of PCD material, and the average life of the PCD wear-resistant tool is 100,000. The product requires different surface roughness requirements for each part of the hole. According to the traditional method, two tools are needed to meet the processing requirements. The tool adopts the utility model with a wire cutting serrated cutting edge tool, which will reduce one tool; and reduce the processing cycle and improve productivity.

Claims

1. A PCD tool replacing a boring tool, characterized in that: The invention comprises a blade with a wire-cut serrated cutting edge, wherein the wire-cut serrated spacing and depth of the blade edge are proportional to the surface roughness requirement RZ value of the product to be processed.

2. A PCD tool replacing a boring tool according to claim 1, characterized in that: It includes a second section blade, a third section blade, and a fourth section blade, wherein the second section blade, the third section blade, and the fourth section blade all have a wire cutting sawtooth cutting edge; The second section blade is arranged in the hole finishing and reverse chamfering area of ​​the PCD tool; the third section blade is arranged in the hole finishing area of ​​the PCD tool; and the fourth section blade is arranged in the hole entrance finishing chamfering area of ​​the PCD tool.

3. A PCD tool replacing a boring tool according to claim 2, characterized in that: The surface roughness requirement for the second and fourth section products is RZ10, and the surface roughness requirement for the third section products is RZ20-RZ25. The serration spacing and depth of the wire-cut serrated cutting edges of the second and fourth section blades are smaller than those of the wire-cut serrated cutting edges of the third section blades.

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