TWI665297B - Cutting fluid for stainless steel - Google Patents

Abstract

The invention relates to a stainless steel cutting fluid, which is formed by adding an appropriate amount of water and diluting to form a group of water molecules coated with an oily matrix molecule group, and the oil-water ratio of the cutting fluid is adjusted to provide good cooling and cleaning characteristics of the aqueous cutting fluid. It can also have the advantages of strong lubrication ability of oily cutting fluid, long rust prevention and anti-corrosion cycle. The invention can be used to process workpieces with high hardness and large cutting volume, and can overcome the problems of foaming and bacterial growth of aqueous cutting fluid, and oil mist volatilization of oily cutting fluid.

Description

Stainless steel cutting fluid

The invention relates to the technical field of metal cutting fluid, in particular to a stainless steel cutting fluid having properties of both water-based molecules and oil-based molecules.

Traditional cutting fluids are roughly divided into oily and water-based. These two types of cutting fluids have their own advantages and disadvantages in industrial applications, and can be applied to different processes to handle the cutting needs of different products.

For example, in the application field of stainless steel, the cutting fluid can be an oil-based cutting fluid that is directly added to the used oily substrate, or an aqueous cutting fluid that needs to be diluted by adding an aqueous solution, which are separately described as follows:

Oily cutting fluid has several advantages, namely (1) no need to add water for dilution and easy operation; (2) outstanding lubrication ability, which can be used to process workpieces with high hardness and large cutting volume; (3) rust prevention cycle Long and long service life; (4) it is not easy to breed bacteria and cause cutting fluid to deteriorate or produce odor; and (5) it is easier to manage and maintain than water-based cutting liquid.

However, in addition to the advantages of oily cutting fluids, there are also many disadvantages, such as higher fluid replacement costs, poor cooling performance, weaker chip washing ability, and improper use of prone cutting chips to adhere to the abutment. In addition, when oily cutting fluid is mixed with water, it is easy to cause machine rust and reduced tool life. In general, the above disadvantages will cause difficulty in cleaning the processed products. If the oily substance is volatilized during the use of the oily cutting fluid, the volatile oily substance will generate oil mist on the processing machine tools, factory walls and floors.

Water-based cutting fluids are different from oil-based cutting fluids in that they require the addition of a large amount of water. During the dilution of the aqueous cutting fluid, molecular clusters of oil molecules coated with aqueous molecules are formed, the concentration of the aqueous cutting fluid is low, and the cost is therefore relatively low. In addition, compared with oily cutting fluids, water-based cutting liquids have the advantages of relatively good cooling performance, and the ability of processed products to easily wash and wash debris.

However, in addition to the advantages of water-based cutting fluids, they also have the following disadvantages: their lubricating ability is poor, and the tool is prone to wear when machining workpieces with high hardness. For example, in some extreme cases, water-based cutting fluids may experience processing tool breakage and product quality degradation. Furthermore, water-based cutting fluids have higher requirements for dilution water. If they are used improperly, they will cause unnecessary foaming and bacterial growth.

In view of this, the present invention proposes a stainless steel cutting fluid, which can solve the aforementioned defects.

A first object of the present invention is to provide a stainless steel cutting fluid, which can be applied to the field of metal material processing (such as Computer Numerical Control (CNC)), so that metal materials can be used in the processing process with lubrication, cooling, and cleaning Cutting fluid with anti-corrosion and anti-rust functions.

A second object of the present invention is based on the stainless steel cutting fluid, which is composed of at least a base, a lubricant, an emulsifier, a surfactant, and a defoamer.

A third object of the present invention is to provide lubrication, antibacterial, anti-corrosion, and rust-prevention characteristics related to an oil-based cutting fluid according to the above-mentioned stainless steel cutting fluid, and to have cleaning and cooling characteristics related to an aqueous cutting fluid.

In order to achieve the above object and other objects, the present invention provides a stainless steel cutting fluid, which is composed of various raw material components, which is characterized in that each raw material component and its mass percentage are, respectively, a base of 20 to 80%; a lubricant of 3 to 50 %; An emulsifier 1 to 20%; a surfactant 1 to 30%; and a defoamer 1 to 10%.

Compared with the conventional technology, the stainless steel cutting fluid provided by the present invention uses a new chemical composition formula, so that the cutting fluid can be compatible with the advantages of oily cutting fluid and water-based cutting fluid at the same time.

In the use of the stainless steel cutting fluid of the present invention, after adding appropriate water to dilute, the macromolecular groups in the cutting fluid are coated with oily molecular groups to produce oily molecular groups, and the special blending ratio allows the The oil-water ratio is moderate. According to the data of the blending ratio provided by the present invention, in addition to the cooling and cleaning (or cleaning) characteristics of the aqueous cutting fluid, the stainless steel cutting fluid of the present invention also has the high lubrication, corrosion resistance and long rust prevention period of the oily cutting fluid. And other advantages.

The aforementioned stainless steel cutting fluid is expected to be applicable to workpieces with high hardness and / or large cutting volume. At the same time, the present invention also overcomes the problems of aqueous solution generation, such as foam and bacterial growth, with an oily cutting fluid, and overcomes the problems of oily cutting fluid generation, such as oil mist volatility, with an aqueous cutting fluid.

In addition, the stainless steel cutting liquid phase of the present invention is no different from the general industrial water-based cutting fluid and oily cutting fluid, and the relevant operators do not need to re-learn new processes and the related working machines are not necessary to change, that is, the present invention The stainless steel cutting fluid can easily replace the existing single water-based or oil-based cutting fluid.

In order to fully understand the purpose, characteristics and effects of the present invention, the following specific embodiments and the accompanying drawings are used to make a detailed description of the present invention, which will be described later.

In the present invention, "a" or "an" is used to describe the units, elements and components described herein. This is only for convenience of explanation and provides a general meaning to the scope of the present invention. Therefore, unless it is obvious that he meant otherwise, such a description should be understood to include one, at least one, and the singular also includes the plural.

In the present invention, the terms "including", "including", "having", "containing" or any other similar terms are intended to cover non-exclusive inclusions. For example, an element, structure, article, or device containing a plurality of elements is not limited to only those elements listed herein, but may include an element, structure, article, or device that is not explicitly listed but is generally inherent to the element, structure, article, or device Other requirements. In addition, unless expressly stated to the contrary, the term "or" means an inclusive "or" rather than an exclusive "or".

The raw material components of the stainless steel cutting fluid provided by the present invention include a substrate, a lubricant, an emulsifier, a surfactant and a defoamer. Stainless steel cutting fluid has the characteristics of lubrication, antibacterial, anti-corrosion and rust prevention related to an oily cutting fluid, and has the cleaning and cooling characteristics related to an aqueous cutting fluid.

The stainless steel cutting fluid consists of each raw material composition and its mass percentage are:

The base is 20 ~ 80%. In this embodiment, the substrate is oily and may be a n-isoparaffin selected from C _16- C _3. For example, the substrate may be white oil No. 5.

The lubricant is 3 ~ 50%. In this embodiment, the humectant includes at least one component of a ricinoleate polyester compound, a trimethylolpropane oleate, and a sulfurized extreme pressure agent. Among them, the ricinoleate polyester compound may be 10 to 50% of tetrameric ricinoleic acid, trimethylolpropane oleate is 5 to 45%, and the sulfurized extreme pressure agent is 3 to 45%, such as lubrication The agent may include a portion of the GS440 sulfurized extreme pressure agent.

The emulsifier is between 1 and 20%. In this embodiment, the emulsifier is sodium monosulfonate. The sodium sulfonate includes a fatty alcohol polyoxyethylene polyoxypropylene ether and a monoalkyl oxidized fatty alcohol. For example, the emulsifier may be a type 60 sodium sulfonate.

The surfactant is between 1 and 30%. In this embodiment, the surfactant is a fatty alcohol polyoxyethylene ether phosphate. For example, the surfactant may be RT64 and AEO-3.

The defoaming agent is between 1 and 10%. In this embodiment, the defoamer is a modified polydimethylsiloxane. For example, the defoamer may be an organic silicon defoamer of AFE-1247.

The technical solutions of the present invention are further described below through specific embodiments.

Example one

The stainless steel cutting fluid is composed of the following components by weight percentage: base 40%, a lubricant 3%, an emulsifier 10%, a surfactant 17%, an antifoaming agent 10% and the balance is water. The preparation method is as follows : White oil No. 5, castor oleate polyester compound, trimethylolpropane oleate, GS440 extreme pressure curing agent, 60 type sodium sulfonate, RT64 (surfactant), AEO-3 (surface activity Agent), AFE-1247 (organic silicon defoamer), and heated to 70-85 ° C, and kept for 2-4 hours, then cooled to obtain stainless steel cutting fluid.

Example two

The stainless steel cutting fluid is composed of the following components in terms of weight percentage: 20% of the base, 10% of a lubricant, 20% of an emulsifier, 25% of a surfactant, 10% of a defoamer, and the balance is water.

Example three

The stainless steel cutting fluid is composed of the following components by weight percentage: 25% of the base, 20% of a lubricant, 10% of an emulsifier, 25% of a surfactant, 10% of a defoamer, and the balance is water.

Embodiment 4

The stainless steel cutting fluid is composed of the following components by weight percentage: base 50%, a lubricant 25%, an emulsifier 10%, a surfactant 10%, a defoaming agent 2% and the balance is water.

Example 5

The stainless steel cutting fluid is composed of the following components by weight percentage: 65% of the base, 15% of a lubricant, 10% of an emulsifier, 5% of a surfactant, 3% of a defoamer, and the balance is water.

Example Six

The stainless steel cutting fluid is composed of the following components by weight percentage: base 80%, a lubricant 5%, an emulsifier 2%, a surfactant 3%, an antifoaming agent 6%, and the balance is water.

After testing the aforementioned stainless steel cutting fluid, its characteristics are as follows: project Example parameters One two three four Fives six Proportion of dilution water 10% 10.2% 9.5% 11% 11.2% 9.7% Effective content 76% 73% 72% 69% 79% 81% Refractive index 1.5 1.4 1.45 1.47 1.53 1.52 PH (at 5% concentration) 9.1 8.3 8.5 9.2 9.3 9.4 Viscosity (40 ° C, before dilution) 239.6 239 240.2 242.3 244.5 238.4 Viscosity (41 ° C, after dilution) 75 75.6 77 78 73 71.5

The stainless steel cutting fluid of this example is compared with three commercially available cutting fluids, and the comparison results are shown in Table 1: Food items Cleaning rate (%) Biodegradation rate (%) (10th) Stainless time / h Example one 95.4 30.36 162 Example two 94.5 35.98 192 Example three 96.2 25.32 168 Embodiment 4 94.5 22.12 188 Example 5 93.7 23.47 177 Example Six 94.5 19.47 170 Cutting fluid A 90 8.98 150 Cutting fluid B 89 12.32 161 Cutting fluid C 85 10.12 149 Table 1

As can be seen from Table 1, compared to the commercially available cutting fluid AC, the stainless steel cutting fluids of Examples 1 to 6 of the present invention have better cleaning / washing effect / stainless time, and the biodegradation rate exceeds 10 days. 19.47%, far exceeding the theoretical value (10%) of the biodegradation rate, and close to twice the theoretical value, indicating that the stainless steel cutting fluid of the present invention can achieve rapid biodegradation. In addition, the rust-free time was on average higher than that of the commercially available cutting fluids A-C in Examples 1 to 6.

The present invention has been disclosed in the foregoing with preferred embodiments. However, those skilled in the art should understand that the embodiments are only used to describe the present invention and should not be interpreted as limiting the scope of the present invention. It should be noted that all changes and substitutions equivalent to the embodiments should be included in the scope of the present invention. Therefore, the scope of protection of the present invention shall be defined by the scope of the patent application.

Claims (5)

A stainless steel cutting fluid is a mixture of various raw material components in water to produce a large molecular group of oily molecular groups covering water-based molecular groups. The stainless steel cutting fluid is characterized in that each raw material component and its mass percentage are: a substrate 20 ~ 80%, wherein the substrate is selected from C ₁₆ -C ₃ n-isoparaffin; a lubricant 3-50%, wherein the wetting agent comprises at least one ricinoleate polyester compound, and Ingredients of propane oleate and a monosulfide extreme pressure agent; 1 ~ 20% of sodium monosulfonate; 1 ~ 30% of fatty alcohol polyoxyethylene ether phosphate; and 1 ~ 10% of an antifoaming agent, among which The defoamer is a modified polydimethylsiloxane. The stainless steel cutting fluid according to item 1 of the scope of the patent application, wherein the ricinoleate polyester compound may be 10-50% of tetrameric ricinoleic acid, 5-45% of the trihydrocarbon methylpropane oleate, The sulfurized extreme pressure agent is 3 to 45%. The stainless steel cutting fluid according to item 1 of the scope of the patent application, wherein the fatty alcohol polyoxyethylene ether phosphate is RT64 or AEO-3. The stainless steel cutting fluid described in item 1 of the scope of the patent application has the characteristics of lubrication, antibacterial, anti-corrosion and rust prevention of an oily cutting fluid, and the cleaning and cooling characteristics of an aqueous cutting fluid. The stainless steel cutting fluid according to item 1 of the scope of the patent application, wherein the substrate is white oil and the defoamer may be an organic silicon defoamer.