Method for adding defoaming agent into magnesium alloy cutting fluid

Abstract

The invention discloses a method for adding a defoaming agent into a magnesium alloy cutting fluid, which comprises the following steps: mixing the defoaming agent and ethylene glycol according to the weight ratio of 1: (5-10), stirring until the defoaming agent and ethylene glycol are completely dissolved to obtain a defoaming agent ethylene glycol solution, slowly adding the solution into the magnesium alloy cutting fluid, and adjusting the pH value to 8-9.5. The problems that an existing traditional defoaming agent adding method is that a defoaming agent is directly added into a cutting fluid system, so that the dispersity of the defoaming agent is poor, the defoaming effect is not lasting, and the performance of the cutting fluid is affected are solved.

Description

Technical Field

[0001] The present invention relates to the field of magnesium alloy processing, and in particular, to a method for adding an antifoaming agent to a magnesium alloy cutting fluid. Background Art

[0002] Full synthetic magnesium alloy cutting fluids are widely used in the field of magnesium alloy processing due to their excellent cooling, lubricating, rust-proof and other properties. However, during actual use, due to factors such as mechanical stirring and metal surface active substances, the cutting fluid is prone to generate foam, which affects the processing efficiency and the surface quality of the workpiece. The traditional method of adding an antifoaming agent is to directly add the antifoaming agent into the cutting fluid system. However, this method has the following disadvantages: 1. Poor dispersibility, the antifoaming agent is difficult to be evenly dispersed in the cutting fluid system and is prone to agglomeration and failure. 2. The defoaming effect is not persistent, the antifoaming agent is easy to precipitate from the cutting fluid system, resulting in an unpersistent defoaming effect. 3. It affects the performance of the cutting fluid, and some antifoaming agents may affect the lubricating performance, rust-proof performance, etc. of the cutting fluid. Therefore, optimizing the method of adding an antifoaming agent to eliminate the above disadvantages is an urgent problem to be solved in the present invention. Summary of the Invention

[0003] The purpose of the present invention is to provide a method for adding an antifoaming agent to a magnesium alloy cutting fluid, which solves the problems that the existing traditional method of adding an antifoaming agent is to directly add the antifoaming agent into the cutting fluid system, resulting in poor dispersibility of the antifoaming agent, unpersistent defoaming effect and affecting the performance of the cutting fluid.

[0004] To achieve the above purpose, the present invention provides a method for adding an antifoaming agent to a magnesium alloy cutting fluid, the method includes mixing the antifoaming agent and ethylene glycol in a weight ratio of 1:5 - 10, stirring until completely dissolved to obtain an antifoaming agent ethylene glycol solution, slowly adding this solution to the magnesium alloy cutting fluid, and adjusting the pH to 8 - 9.5.

[0005] Preferably, the antifoaming agent is one or several of silicone-based antifoaming agents, polyether-based antifoaming agents and mineral oil-based antifoaming agents.

[0006] Preferably, the antifoaming agent ethylene glycol solution and the magnesium alloy cutting fluid are mixed in a weight ratio of 1:90 - 110.

[0007] Preferably, slowly add this solution to the magnesium alloy cutting fluid, and use an organic amine compound to adjust the pH to 8 - 9.5.

[0008] Preferably, the organic amine compound is selected as triethanolamine.

[0009] Preferably, the mixing temperature of the antifoaming agent ethylene glycol solution and the magnesium alloy cutting fluid is 40 - 60°C.

[0010] Beneficial effects: The present invention provides a method for adding an antifoaming agent to a magnesium alloy cutting fluid. The method includes mixing the antifoaming agent and ethylene glycol in a weight ratio of 1:5 - 10, stirring until completely dissolved to obtain an antifoaming agent ethylene glycol solution, slowly adding this solution to the magnesium alloy cutting fluid, and adjusting the pH to 8 - 9.5. The method provided by the present invention uses ethylene glycol as a good solvent, which can effectively improve the dispersibility of the antifoaming agent in the cutting fluid system, avoid the agglomeration and failure of the antifoaming agent, and effectively improve the dispersibility of the antifoaming agent in the cutting fluid; the antifoaming agent is uniformly dispersed in the cutting fluid system, which can more effectively capture and destroy bubbles, obtaining a more persistent and efficient antifoaming effect; the addition of ethylene glycol can improve the stability of the cutting fluid system and prevent the layering or precipitation of the antifoaming agent. This method is simple to operate and easy for industrial production.

[0011] Other features and advantages of the present invention will be described in detail in the subsequent specific implementation part. Specific implementation

[0012] The following details the specific implementation of the present invention. It should be understood that the specific implementation described herein is only for the purpose of illustrating and explaining the present invention, and is not used to limit the present invention.

[0013] Example 1

[0014] Mix 10 g of silicone-based antifoaming agent and 50 g of industrial-grade ethylene glycol, stir until completely dissolved to obtain an antifoaming agent ethylene glycol solution; slowly add the obtained antifoaming agent ethylene glycol solution to 1000 g of a fully synthetic magnesium alloy cutting fluid system, stirring while adding to ensure uniform mixing; use triethanolamine to adjust the pH value of the cutting fluid to 8 - 9.5; conduct performance tests on the cutting fluid after adding the antifoaming agent. The results show that the antifoaming performance is excellent, and the lubrication performance, rust prevention performance, etc. all meet the usage requirements.

[0015] Example 2

[0016] Mix 5 g of polyether-based antifoaming agent and 5 g of mineral oil-based antifoaming agent with 100 g of industrial-grade ethylene glycol, stir until completely dissolved to obtain an antifoaming agent ethylene glycol solution; slowly add the obtained antifoaming agent ethylene glycol solution to 1000 g of a fully synthetic magnesium alloy cutting fluid system, stirring while adding to ensure uniform mixing; use triethanolamine to adjust the pH value of the cutting fluid to 8 - 9.5; conduct performance tests on the cutting fluid after adding the antifoaming agent. The results show that the antifoaming performance is excellent, and the lubrication performance, rust prevention performance, etc. all meet the usage requirements.

[0017] Comparative Example 1

[0018] 10 g of organosilicon defoamer was directly added to 1000 g of a fully synthetic magnesium alloy cutting fluid system and stirred and mixed evenly. Performance tests were carried out on the cutting fluid after adding the defoamer. The results showed that the defoamer had poor dispersibility, the defoaming effect was not persistent, and it had a certain impact on the lubricating performance and rust prevention performance of the cutting fluid.

[0019] Comparative Example 2

[0020] 5 g of polyether defoamer and 5 g of mineral oil defoamer were directly added to 1000 g of a fully synthetic magnesium alloy cutting fluid system and stirred and mixed evenly. Performance tests were carried out on the cutting fluid after adding the defoamer. The results showed that the defoamer had poor dispersibility, the defoaming effect was not persistent, and it had a certain impact on the lubricating performance and rust prevention performance of the cutting fluid.

[0021] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0022] In addition, it should be noted that, in the case of no contradiction, the various specific technical features described in the above specific embodiments can be combined in any suitable way. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

[0023] In addition, any combination can be made between various different embodiments of the present invention, as long as it does not violate the idea of the present invention, and it should also be regarded as the content disclosed by the present invention.

Claims

1. A method for adding a defoaming agent to a magnesium alloy cutting fluid, characterized in that: The method comprises mixing a defoamer and ethylene glycol in a weight ratio of 1:5-10, stirring until completely dissolved to obtain a defoamer ethylene glycol solution, slowly adding the solution into a magnesium alloy cutting fluid, and adjusting the pH to 8-9.

5.

2. The method for adding a defoaming agent to a magnesium alloy cutting fluid according to claim 1, characterized in that: The defoaming agent is one or more of an organosilicon defoaming agent, a polyether defoaming agent and a mineral oil defoaming agent.

3. The method for adding a defoaming agent to a magnesium alloy cutting fluid according to claim 2, characterized in that: The defoaming agent ethylene glycol solution is mixed with the magnesium alloy cutting fluid in a weight ratio of 1:90-110.

4. The method for adding a defoaming agent to a magnesium alloy cutting fluid according to claim 3, characterized in that: The solution is slowly added into the magnesium alloy cutting fluid, and the pH value is adjusted to 8-9.5 using an organic amine compound.

5. The method for adding a defoaming agent to a magnesium alloy cutting fluid according to claim 4, characterized in that: The organic amine compound is triethanolamine.

6. The method for adding a defoaming agent to a magnesium alloy cutting fluid according to claim 5, characterized in that: The mixing temperature of the defoaming agent ethylene glycol solution and the magnesium alloy cutting fluid is 40-60°C.