Method for grinding ultra-fine grain size hard alloy cutter

Abstract

The invention discloses a method for grinding an ultra-fine grain size hard alloy cutter, which comprises the following steps of: 1) grinding a diamond grinding wheel adopting a resin binding agent, wherein the grain size of the diamond grinding wheel is D46; and (2) in the machining process, the linear speed of the diamond grinding wheel is 20-22 m / min, the alloy cutter material feeding speed is 40-50 mm / min, and the grinding depth is 1.4-1.6 mm. According to the technical scheme, the material and the granularity of the diamond grinding wheel and the technological parameters in the machining process are controlled, so that the milling cutter cutting edge cannot be broken in the grinding process, the quality of the milling cutter cutting edge is improved, and the service life of a milling cutter is prolonged.

Description

Technical Field

[0001] The invention relates to a method for grinding a superfine grain cemented carbide tool, belonging to the technical field of grinding processing. Background Art

[0002] In the field of mechanical processing, milling is a very common processing method, which is used to perform forming and processing operations on various metal and non-metal materials. Traditional milling cutters have limitations in edge design, grinding and tool materials (ultra-fine grain size). For example, the grinding of milling cutters has poor edges or micro-chipping, which directly affects the surface quality, precision and tool life of the workpiece. Today, the manufacturing industry is developing in the direction of high precision and high surface quality. High-strength alloy steel, titanium alloy, high-temperature alloy, etc. are widely used in high-end manufacturing industries such as aerospace, aeroengine, and automobile manufacturing. These materials have the characteristics of high hardness and strong toughness, which has prompted research on the edges of alloy milling cutters, hoping to improve the efficiency and quality of milling by improving the characteristics of the milling cutter edges, so that the milling cutter edges are of great importance in the production grinding process. Summary of the invention

[0003] The purpose of the present invention is to provide a method for grinding ultrafine-grained cemented carbide cutting tools, which is used to solve the problem of chipping of the milling cutter edge during the grinding process, thereby improving the quality of the milling cutter edge.

[0004] The technical solution of the present invention is a method for grinding ultrafine-grained cemented carbide tools, comprising the following steps: 1) Grinding uses a resin bonded diamond wheel with a diamond wheel grit of D46; 2) During the processing, the linear speed of the diamond grinding wheel is 20-22 m / min, the alloy tool material feed is 40-50 mm / min, and the grinding depth is 1.4 mm-1.6 mm.

[0005] In the aforementioned method for grinding ultra-fine-grained cemented carbide tools, the cemented carbide tools refer to tools with a cobalt content of ≤9%, a hardness of >93HRA, and a grain size of ≤0.3um.

[0006] Beneficial effects of the present invention: Compared with the prior art, the present invention adopts the above-mentioned technical scheme, and controls the material, particle size, and process parameters of the diamond grinding wheel during the processing, so that the milling cutter edge will not be chipped during the grinding process, thereby improving the quality of the milling cutter edge and increasing the service life of the milling cutter. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 This is a schematic diagram of the groove edge of the carbide round bar before the process is adjusted; Figure 2 A schematic diagram of the grooved cutting edge of a cemented carbide round bar material using the method of the present invention; Figure 3 This is a schematic diagram of grinding the peripheral cutting edge of a carbide milling cutter before the process is adjusted; Figure 4 The present invention is a schematic diagram of grinding the peripheral cutting edge of a cemented carbide milling cutter using the method of the present invention. DETAILED DESCRIPTION

[0008] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0009] Embodiment 1 of the present invention: A method for grinding an ultrafine-grained cemented carbide tool comprises the following steps: 1) Grinding uses a resin bonded diamond wheel with a diamond wheel grit of D46; 2) During the machining process, the linear speed of the diamond grinding wheel is 20 m / min, the alloy tool material feed is 40 mm / min, and the grinding depth is 1.6 mm.

[0010] Embodiment 2 of the present invention: A method for grinding an ultrafine-grained cemented carbide tool comprises the following steps: 1) Grinding uses a resin bonded diamond wheel with a diamond wheel grit of D46; 2) During the machining process, the linear speed of the diamond grinding wheel was 21 m / min, the alloy tool material feed was 45 mm / min, and the grinding depth was 1.2 mm.

[0011] Embodiment 3 of the present invention: A method for grinding an ultrafine-grained cemented carbide tool comprises the following steps: 1) Grinding uses a resin bonded diamond wheel with a diamond wheel grit of D46; 2) During the machining process, the linear speed of the diamond grinding wheel was 22 m / min, the alloy tool material feed was 50 mm / min, and the grinding depth was 0.8 mm.

[0012] The cemented carbide tool in the above embodiment refers to a tool with a cobalt content of ≤9%, a hardness of >93HRA, and a grain size of ≤0.3um.

[0013] In order to verify whether the method of the present invention is effective, the method of the present invention is used to grind a hard alloy round bar. The grinding results are as follows: Figure 2 and Figure 4 As shown. Figure 1 and Figure 3 This is a schematic diagram of the groove edge and peripheral edge of the carbide round bar before the process is adjusted. Figure 1 and Figure 3The middle line part clearly shows that the cutting edge has multiple chippings. After grinding using the method of the present invention, it is clearly seen that the cutting edge of the slotting cutting edge and the peripheral cutting edge have no chipping, and the overall smoothness is good.

Claims

1. A method for grinding ultrafine grain cemented carbide tools, characterized in that: The steps include: 1) Grinding uses a resin bonded diamond wheel with a diamond wheel grit of D46; 2) During the processing, the linear speed of the diamond grinding wheel is 20-22m / min, the alloy tool material feed is 40-50mm / min, and the grinding depth is ≤1.6mm.

2. The method for grinding ultrafine-grained cemented carbide tools according to claim 1, characterized in that: The cemented carbide tool refers to a tool with a cobalt content of ≤9%, a hardness of >93HRA, and a grain size of ≤0.3um.

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