A forming process for numerically controlled blades

Abstract

The application discloses a forming process of a numerical control blade and relates to the field of hard alloy, and comprises the following steps: preparing a mixture, ball milling the mixture, spray drying, and sintering to obtain the numerical control blade; when the ball milling is performed, a forming agent is added, the forming agent comprises a binder component, a lubricating component and an active agent, and the active agent is n-pentyl triethanolamine. The forming agent of mixed components is added during the ball milling, especially an active agent with a short chain, hydrophobicity and low oxygen element is added, the dispersibility of the mixture is improved, the carbon residue is greatly reduced due to the short chain, and the production efficiency of the hard alloy is improved.

Description

Technical Field

[0001] This invention relates to the field of cemented carbide, and more specifically to a forming process for CNC cutting tools. Background Technology

[0002] CNC inserts are key consumables in modern machining, widely used in high-precision cutting tasks such as turning and milling. Their performance directly depends on the material properties and the precision of the manufacturing process. Currently, mainstream CNC inserts use cemented carbide (such as tungsten-cobalt) as the base material due to its advantages such as high hardness, high temperature resistance, and wear resistance. The entire forming process must ensure dimensional consistency, cutting edge strength, and chip breaking control. However, in existing machining processes, issues such as dimensional deviations, large cutting edge burrs, notches, runout, and deformation still exist, leading to unstable product quality; therefore, a forming process is urgently needed to solve this problem. Summary of the Invention

[0003] The purpose of this invention is to at least solve one of the technical problems existing in the prior art and to provide a forming process for CNC cutting tools.

[0004] The technical solution of the present invention is as follows: A forming process for CNC cutting tools includes the following steps: The mixture is prepared by ball milling, spray drying, pressing, and sintering. During ball milling, a forming agent is added, which includes a binder, a lubricant, and an activator, wherein the activator is n-pentyltriethanolamine.

[0005] As a preferred embodiment of the present invention, the mixture includes 0.4-0.5 μm WC powder and 0.8-1.0 μm WC powder, as well as Co powder.

[0006] In a preferred embodiment of the present invention, the molding agent accounts for 5-6 wt% of the mixture.

[0007] In a preferred embodiment of the present invention, the binder is stearic acid and the lubricant is ethyl cellulose.

[0008] As a preferred embodiment of the present invention, the mass ratio of the binder, lubricant and activator is 2:1:0.5-1.

[0009] As a preferred embodiment of the present invention, the sintering temperature is 1400-1500℃.

[0010] In a preferred embodiment of the present invention, the ball milling medium is ethanol.

[0011] As a preferred embodiment of the present invention, the ball milling time is 30-50 min and the ball-to-material ratio is 3-5:1.

[0012] The beneficial effects of this invention are: by adding a forming agent to the mixture during ball milling, especially by adding a short-chain, hydrophobic activator with low oxygen content, the dispersibility of the mixture is improved, while the short chain length greatly reduces the residual carbon content and improves the production efficiency of cemented carbide. Detailed Implementation

[0013] The embodiments of the present invention are described in detail below. These embodiments are exemplary and are only used to explain the present invention, and should not be construed as limiting the invention. Where specific techniques or conditions are not specified in the embodiments, they are performed according to the techniques or conditions described in the literature in the art or according to the product instructions. Reagents or instruments used, unless otherwise specified, are all commercially available conventional products.

[0014] Example 1

[0015] A forming process for CNC cutting tools includes the following steps: The mixture is prepared by ball milling, spray drying, pressing, and sintering. During ball milling, a forming agent is added, which includes a binder, a lubricant, and an activator, wherein the activator is n-pentyltriethanolamine.

[0016] The mixture includes 0.4-0.5μm WC powder and 0.8-1.0μm WC powder, as well as Co powder, in a ratio of 34:60:6.

[0017] The molding agent accounts for 5 wt% of the mixture.

[0018] The binder is stearic acid, and the lubricant is ethyl cellulose.

[0019] The mass ratio of the binder, lubricant, and activator is 2:1:0.5.

[0020] The sintering temperature was 1420℃, and the sintering time was 40 minutes.

[0021] The ball milling medium is ethanol.

[0022] The ball milling time was 40 minutes, and the ball-to-material ratio was 4:1.

[0023] Example 2

[0024] A forming process for CNC cutting tools includes the following steps: The mixture is prepared by ball milling, spray drying, pressing, and sintering. During ball milling, a forming agent is added, which includes a binder, a lubricant, and an activator, wherein the activator is n-pentyltriethanolamine.

[0025] The mixture includes 0.4-0.5μm WC powder and 0.8-1.0μm WC powder, as well as Co powder, in a ratio of 34:60:6.

[0026] The molding agent accounts for 5 wt% of the mixture.

[0027] The binder is stearic acid, and the lubricant is ethyl cellulose.

[0028] The mass ratio of the binder, lubricant, and activator is 2:1:0.6.

[0029] The sintering temperature was 1420℃, and the sintering time was 40 minutes.

[0030] The ball milling medium is ethanol.

[0031] The ball milling time was 40 minutes, and the ball-to-material ratio was 4:1.

[0032] Example 3

[0033] A forming process for CNC cutting tools includes the following steps: The mixture is prepared by ball milling, spray drying, pressing, and sintering. During ball milling, a forming agent is added, which includes a binder, a lubricant, and an activator, wherein the activator is n-pentyltriethanolamine.

[0034] The mixture includes 0.4-0.5μm WC powder and 0.8-1.0μm WC powder, as well as Co powder, in a ratio of 34:60:6.

[0035] The molding agent accounts for 5 wt% of the mixture.

[0036] The binder is stearic acid, and the lubricant is ethyl cellulose.

[0037] The mass ratio of the binder, lubricant, and activator is 2:1:0.7.

[0038] The sintering temperature was 1420℃, and the sintering time was 40 minutes.

[0039] The ball milling medium is ethanol.

[0040] The ball milling time was 40 minutes, and the ball-to-material ratio was 4:1.

[0041] Example 4

[0042] A forming process for CNC cutting tools includes the following steps: The mixture is prepared by ball milling, spray drying, pressing, and sintering. During ball milling, a forming agent is added, which includes a binder, a lubricant, and an activator, wherein the activator is n-pentyltriethanolamine.

[0043] The mixture includes 0.4-0.5μm WC powder and 0.8-1.0μm WC powder, as well as Co powder, in a ratio of 34:60:6.

[0044] The molding agent accounts for 5 wt% of the mixture.

[0045] The binder is stearic acid, and the lubricant is ethyl cellulose.

[0046] The mass ratio of the binder, lubricant, and activator is 2:1:0.8.

[0047] The sintering temperature was 1420℃, and the sintering time was 40 minutes.

[0048] The ball milling medium is ethanol.

[0049] The ball milling time was 40 minutes, and the ball-to-material ratio was 4:1.

[0050] Example 5

[0051] A forming process for CNC cutting tools includes the following steps: The mixture is prepared by ball milling, spray drying, pressing, and sintering. During ball milling, a forming agent is added, which includes a binder, a lubricant, and an activator, wherein the activator is n-pentyltriethanolamine.

[0052] The mixture includes 0.4-0.5μm WC powder and 0.8-1.0μm WC powder, as well as Co powder, in a ratio of 34:60:6.

[0053] The molding agent accounts for 5 wt% of the mixture.

[0054] The binder is stearic acid, and the lubricant is ethyl cellulose.

[0055] The mass ratio of the binder, lubricant, and activator is 2:1:1.

[0056] The sintering temperature was 1420℃, and the sintering time was 40 minutes.

[0057] The ball milling medium is ethanol.

[0058] The ball milling time was 40 minutes, and the ball-to-material ratio was 4:1.

[0059] Comparative Example 1 Unlike Example 1, the molding agent used is paraffin.

[0060] Comparative Example 2 Unlike Example 1, no activator was added to the molding agent.

[0061] The performance of the above embodiments and comparative examples was tested, and the test results are shown in Table 1.

[0062] Table 1 Performance test results of the examples and comparative examples

[0063] As can be seen from the table above, the performance of the embodiment is better than that of the comparative example. The main reason may be that the embodiment adds a forming agent of the mixed components during ball milling, especially a short-chain, hydrophobic activator with low oxygen content, which improves the dispersibility of the mixture. The short chain length greatly reduces the residual carbon content and improves the mechanical properties of the cemented carbide.

[0064] The embodiments described above are merely preferred embodiments of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various other corresponding changes and modifications based on the technical solutions and concepts described above, and all such changes and modifications should fall within the protection scope of the claims of the present invention.

Claims

1. A forming process for CNC cutting tools, characterized in that, Includes the following steps: The mixture is prepared by ball milling, spray drying, pressing, and sintering. During ball milling, a forming agent is added, which includes a binder, a lubricant, and an activator, wherein the activator is n-pentyltriethanolamine.

2. The forming process of a CNC cutting tool according to claim 1, characterized in that, The mixture includes 0.4-0.5μm WC powder and 0.8-1.0μm WC powder, as well as Co powder.

3. The forming process of a CNC cutting tool according to claim 1, characterized in that, The molding agent accounts for 5-6 wt% of the mixture.

4. The forming process of a CNC cutting tool according to claim 1, characterized in that, The binder is stearic acid, and the lubricant is ethyl cellulose.

5. The forming process of a CNC cutting tool according to claim 1, characterized in that, The mass ratio of the binder, lubricant, and activator is 2:1:0.5-1.

6. The forming process of a CNC cutting tool according to claim 1, characterized in that, The sintering temperature is 1400-1500℃.

7. The forming process of a CNC cutting tool according to claim 1, characterized in that, The ball milling medium is ethanol.

8. The forming process of a CNC cutting tool according to claim 1, characterized in that, The ball milling time is 30-50 minutes, and the ball-to-material ratio is 3-5:1.

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