WO2019076123A1

WO2019076123A1 - Water jet cutting material, water jet cutting head capable of reducing water diffusion and improving cutting efficiency of water jet cutter and method for using same

Info

Publication number: WO2019076123A1
Application number: PCT/CN2018/101033
Authority: WO
Inventors: 姚光纯
Original assignee: 江西应陶康顺实业有限公司
Priority date: 2017-10-16
Filing date: 2018-08-17
Publication date: 2019-04-25
Also published as: CN107671744A

Abstract

A water jet cutting material, a water jet cutting head capable of reducing water diffusion and improving the cutting efficiency of a water jet cutter and a method for using same. The water jet cutting head comprises a water inlet tube (1), a cavity (2), a spraying nozzle (3), and an additive side tube (4); the water inlet tube (1) is communicated with the cavity (2), and the cavity (2) is communicated with the spraying nozzle (3); the additive side tube (4) is communicated with the cavity (2), and an included angle between the axis of the additive side tube (4) and the axis of the cavity (2) is an acute angle; an additive made of one of glycerin, a glycerin aqueous solution, propylene glycol, a propylene glycol aqueous solution, a sucrose solution, and a polyvinyl alcohol aqueous solution is added in the additive side tube (4).

Description

Water cutting material, water cutting head capable of reducing water diffusion and improving waterjet cutting efficiency and using method thereof

Technical field

The invention relates to the technical field of high-pressure water jet cutting, in particular to a water cutting material, a water cutting head which reduces water diffusion and improves water cutting efficiency and a using method thereof.

Background technique

Waterjet refers to a tool that presses water in one direction and shoots high-pressure water to cut articles. It is a cutting technique that uses water as a cutting tool. The technology originated in the United States and was used in aviation. Aerospace military industry. It is favored for its cold cutting without changing the physicochemical properties of the material. After continuous improvement of technology, garnet sand is mixed in high-pressure water, which greatly improves the cutting speed and cutting thickness of the waterjet. According to the situation of Gaza: water cutting is divided into two methods: sandless cutting and sand cutting.

The waterjet can adopt the punching and shearing method for some metal parts, which has high efficiency and high speed, but requires specific molds and tools. The water cutting is more flexible than the cutting method, and can cut the workpiece of any shape at any time, especially in In the case of thick material and high hardness, the punching and shearing process will be difficult or impossible to achieve, and the water cutting method is ideal; flame cutting is also a common cutting process in the metal field, and the thickness of the cutting is very large, but compared with water cutting. The thermal effect is obvious, the quality and precision of the cutting surface are poor, and the water cutting can well solve the cutting process of some special materials such as high melting point, alloy and composite materials.

Waterjet has been widely used in many industries such as ceramics, stone, glass, metal and composite materials. It can process any curve with any curve at one time; it can realize the cutting process of any curve, which is convenient, flexible and versatile.

However, based on the market, the water knife is only pure water knife cutting and water sand cutting. It is not suitable for cutting ceramic clay body. There are three reasons for not suitable: 1. The clay mud body is sanded to make the sand stick to the blank. In the body, it can not be cleaned, and the subsequent calcined sand will be firmly sintered together with the green body to make the clay products scrap; 2. Pure water cutting, the strength is not good, it is difficult to quickly cut the clay body flat; 3. Pure water The spraying process is diffused, the energy is not concentrated, and the water stiffness is insufficient, which affects the cutting efficiency.

Summary of the invention

The invention aims at the above-mentioned deficiencies of the prior art, and provides a method for not using sand particles, thereby not adhering sand particles on the clay body, without cleaning, and having low scrap rate of the subsequent sintered ceramic mud products, strong water cutting strength, and quick potting The water cutting material has a flat cutting, a small concentration of energy, a high water rigidity, and a water-cutting material which does not affect the cutting efficiency and reduces water diffusion and improves the cutting efficiency of the water jet.

The water-cutting material of the present invention includes water and an additive for cutting the material to be processed by the water cutting device.

The additive according to the invention is: glycerol, glycerin aqueous solution (unwanted solubility), propylene glycol, propylene glycol aqueous solution (unlimited solubility), sucrose solution (unacceptable solubility), polyvinyl alcohol aqueous solution (dissolved) The degree of hydrogen peroxide (unlimited in concentration) can be mixed with water in any ratio.

The invention also provides a water cutting head which reduces water diffusion and improves waterjet cutting efficiency, and the water cutting head comprises an inlet pipe, a cavity, a nozzle and an additive side pipe; the inlet pipe communicates with the cavity, the cavity and The nozzle is connected; the additive side tube is in communication with the cavity, and the angle between the axis of the additive side tube and the axis of the cavity is an acute angle; the additive side tube is added with glycerin, glycerol Aqueous solution (no solubility), propylene glycol, propylene glycol aqueous solution (no solubility), sucrose solution (no solubility), polyvinyl alcohol aqueous solution (no solubility), hydrogen peroxide (no concentration) Additives.

With the above structure, first, water enters the cavity from the inlet pipe, and then is ejected from the nozzle along the cavity. During the flow of the water, since the angle between the axis of the additive side pipe and the axis of the cavity is acute, A negative pressure is generated in the side tube of the additive, thereby driving the additive together and water to be ejected from the nozzle, and performing water cutting on the part to be processed; the invention increases the viscosity and rigidity of the water by adding the additive, so that the water column is not easily diffused, the energy More concentrated, cutting efficiency can be significantly improved. Compared with sand, the additive used in the invention is a slightly toxic, non-toxic organic substance, which can be baked by the clay body even when cut, and can be baked off at the time of high-temperature baking without polluting the environment. It will not affect the physical properties and appearance of the product.

Preferably, the cavity is cylindrical, the nozzle is conical, and the bottom surface of the conical nozzle is equal to the cross-sectional area of the cylindrical cavity; the axis of the additive side tube and the cavity are The angle between the axes is less than 45 degrees; with this structure, the water and the additive can be sufficiently mixed and then ejected from the nozzle, and the structure can also increase the negative pressure effect, so that the additive quickly enters the cavity and fuses with the water. , thereby increasing the spray intensity of water and reducing the degree of diffusion.

Preferably, the additive side tube is capable of opening and closing, and when the additive side tube is opened, the additive enters the cavity from the side tube by a negative pressure, when the additive side tube is closed (closed or closed) The additive enters the cavity together with the water from the inlet pipe. With the above structure, the manner of adding the additive can be realized in a multifunctional manner, and it is not limited to the addition of the additive from the side tube.

Preferably, the water cutting heads are used one or more at the same time, and when used in plurality, can be fixed in parallel or in series.

The invention also provides a method for using a water cutting head of a water cutting device, which specifically comprises:

(1) Firstly, water is added from the inlet pipe and is ejected from the nozzle through the cavity. The process causes a negative pressure to be generated in the side pipe of the additive, so that the additive in the side pipe is sucked into the cavity, and the additive and the water are dissolved together and ejected from the nozzle;

(2) The specific cutting step of the water cutting head, see patent ZL201620801114 for details.

The additive according to the above step (1) of the present invention is glycerin, an aqueous solution of glycerin (unacceptable solubility), propylene glycol, an aqueous solution of propylene glycol (unlimited solubility), a sucrose solution (unacceptable solubility), polyvinyl alcohol One of an aqueous solution (no limitation in solubility) and hydrogen peroxide (unlimited in concentration).

In the above step (1) of the present invention, when the additive side tube is closed, the additive directly enters the cavity from the inlet pipe with water.

Advantages and benefits of the present invention:

The method of the invention can effectively solve the problem that when the pure water is cut, the air resistance water column diffusion causes the energy to be incapable of gathering. The invention is the first time to increase the viscosity and rigidity of the water by adding the additive, so that the water column is not easy to spread and the energy is more concentrated. The cutting efficiency can be significantly improved. Compared with the sand particles, the additives used in the invention are all slightly toxic, non-toxic organic substances, and even if they are stuck in the clay mud body during cutting, the subsequent high-temperature baking can burn them off without polluting the environment. It also does not affect the physical properties and appearance of the product. The additive can increase the density and viscosity of water. According to the energy law Ek=mv ² /2, Ek is kinetic energy, m is the mass of the object, V is the speed, the speed is constant, and m is increased, the energy is increased; the additive can increase the viscosity of the water, Water molecules stick to each other and become harder to spread.

DRAWINGS

Figure 1 is a schematic cross-sectional view of the water jet cutting nozzle of the additive entering the cavity from the additive side tube.

Figure 2 is a schematic cross-sectional view showing the water jet cutting nozzle of the additive entering the cavity from the inlet pipe.

Figure 3 is a rendering of a pure water cut ceramic blank.

Figure 4 is a diagram showing the effect of cutting a ceramic blank after adding an additive to the present invention.

Detailed ways

The invention is further described in detail below by means of examples, but the invention is not limited to the following examples.

Example 1

As shown in FIG. 1 , a water cutting head of the embodiment for reducing water diffusion and improving waterjet cutting efficiency, the water cutting head comprises an inlet pipe 1, a cavity 2, a nozzle 3 and an additive side pipe 4; The inlet pipe is in communication with the cavity, the cavity is in communication with the showerhead; the additive side pipe is in communication with the cavity, and an angle between the axis of the additive side pipe and the axis of the cavity is an acute angle; the additive side pipe Adding glycerin, glycerol aqueous solution (unlimited solubility), propylene glycol, propylene glycol aqueous solution (unlimited solubility), sucrose solution (no solubility), polyvinyl alcohol aqueous solution (unlimited solubility) An additive for the composition. The cavity is cylindrical, the nozzle is conical, and the bottom surface of the conical nozzle is equal to the cross-sectional area of the cylindrical cavity; between the axis of the additive side tube and the axis of the cavity The angle of the inclusion is less than 45 degrees; the additive side tube is in an open state, and the additive enters the cavity from the side tube through a negative pressure.

Example 2

As shown in FIG. 2, a water cutting head of the embodiment for reducing water diffusion and improving waterjet cutting efficiency, the water cutting head comprises an inlet pipe 1, a cavity 2, a nozzle 3 and an additive side pipe 4; The inlet pipe is in communication with the cavity, the cavity is in communication with the showerhead; the additive side pipe is in communication with the cavity, and an angle between the axis of the additive side pipe and the axis of the cavity is an acute angle; the additive side pipe Adding glycerin, glycerol aqueous solution (unlimited solubility), propylene glycol, propylene glycol aqueous solution (unlimited solubility), sucrose solution (no solubility), polyvinyl alcohol aqueous solution (unlimited solubility) An additive for the composition. The cavity is cylindrical, the nozzle is conical, and the bottom surface of the conical nozzle is equal to the cross-sectional area of the cylindrical cavity; between the axis of the additive side tube and the axis of the cavity The angle of the inclusion is less than 45 degrees; the additive side tube is closed, and the additive is mixed from the inlet pipe and the water into the cavity.

The specific water cutting nozzle of the present invention is used as follows:

(2) For example, the complete water cutting device of ZL201620801114 generally includes a high pressure water pump system, a motion control platform, a switch water control system, etc., but it is not a modification of the present application, and therefore will not be described herein. The water cutting controller of the present application may include a high pressure water pump and a controller for regulating the high pressure water pump, and the high pressure water pump may be in communication with the water cutting head. By setting at least two water cutting heads on the base, and each water cutting head is adjusted by the water cutting controller on the base, the water cutting controller can control the water during the honeycomb ceramic wet blank cutting. A water knife is formed at the cutting head for cutting operation. Compared with the conventional cutting device, there is only one water cutting head, and at least two water cutting heads arranged can be cut in series, that is, sequentially cutting a point on the ceramic wet blank, or in parallel The cutting method is adopted, that is, each water cutting head synchronously cuts different points on the ceramic wet blank, and the cutting production efficiency is improved on the basis of performing water knife wet cutting to ensure the regularity of the cutting product and ensuring the stable physical and chemical properties of the product.

In one implementation, the aforementioned at least two water cutting heads may be arranged in parallel alignment with the same spacing between adjacent water cutting heads. In this implementation, the plurality of water cutting heads disposed on the base may be arranged in parallel at equal intervals, and the cutting effect is more stable when cutting in series or parallel mode. As one of the improvements, in the embodiment, the base is provided with two, and the two bases 1 are arranged in parallel, and each of the bases is detachably mounted with three water cutting heads. Correspondingly, the water cutting controller is also provided with two sets. The two sets of bases, water cutting heads and water cutting controllers form a complete series of parallel water jets, which can be cascaded simultaneously when cutting multiple or inline ceramic wet blanks. Parallel cutting, cutting efficiency is higher. For another improvement, a vertical distance sensor can be provided on the base, and a vertical distance sensor is disposed at the bottom of the base. As a further improvement, a horizontal distance sensor is disposed on the base, and a horizontal distance sensor is disposed at a side of the base. When cutting a long ceramic wet billet accurately, it needs to be cut into a plurality of lengths of uniform length, so the water cutting head needs to be accurately moved to the next position after each cutting, vertical distance sensor and horizontal distance sensor The setting facilitates precise orientation adjustment of the subsequent water cutting head. As one of the preferred, the base is a rectangular parallelepiped shape, and the water cutting head is mounted on the bottom surface of the rectangular-shaped base having the largest area. Accordingly, the water cutting controller can be placed in the base or mounted directly on the base.

Comparison of effects: As shown in Fig. 3, in order to use pure water as the water cutting material, the effect diagram of cutting the ceramic blank can be seen from the effect diagram, the cutting effect is very unsatisfactory, irregular, and causes great impact on the blank. As shown in Fig. 4, in order to use water and glycerin as a water cutting material, the effect of cutting the porcelain blank can be seen from the effect diagram, the cutting effect is very ideal, the shape is regular, and there is almost no damage to the blank. It is fully confirmed that the cutting effect after adding the additive of the present invention is very satisfactory; in addition, the strength of the pure water is 100 to 150 MPa, and after the additive, the water strength is 155 to 250 MPa.

Claims

A water cutting material characterized by comprising water and an additive for cutting a material to be processed by a water cutting device.
The water-cutting material according to claim 1, wherein the additive is glycerin, an aqueous solution of glycerin, propylene glycol, an aqueous solution of propylene glycol, a sucrose solution, an aqueous solution of polyvinyl alcohol, hydrogen peroxide, and is mixed with water in any ratio.
A water cutting head for reducing water diffusion and improving waterjet cutting efficiency, characterized in that: the water cutting head comprises an inlet pipe, a cavity, a nozzle and an additive side pipe; the inlet pipe communicates with the cavity, the cavity and The nozzle is connected; the additive side tube is in communication with the cavity, and the angle between the axis of the additive side tube and the axis of the cavity is an acute angle; the additive side tube is added with glycerin, glycerol An aqueous solution of propylene glycol, an aqueous solution of propylene glycol, and a sucrose solution (a solution of one of the aqueous solutions of polyvinyl alcohol).
The water cutting head for reducing water diffusion and improving waterjet cutting efficiency according to claim 3, wherein the cavity is cylindrical, the nozzle is conical, and the bottom surface of the conical nozzle is cylindrical. The cross-sectional areas of the cavities are equal; the angle between the axis of the additive side tube and the axis of the cavity is less than 45 degrees.
A water cutting head for reducing water diffusion and improving water jet cutting efficiency according to claim 3, wherein said additive side tube is capable of opening and closing, and when said additive side tube is opened, the additive passes through the side tube. Negative pressure enters the cavity, and when the additive side tubes are closed, the additive enters the cavity together with the water from the inlet pipe.
A water cutting head for reducing water diffusion and improving waterjet cutting efficiency according to claim 3, wherein said water cutting head is used one or more at the same time, and when used in plurality, can be connected in parallel or in series. The connection method is fixed.
A method for using a water cutting head of a water cutting device is characterized in that:

(1) Firstly, water is added from the inlet pipe and is ejected from the nozzle through the cavity. The process causes a negative pressure to be generated in the side pipe of the additive, so that the additive in the side pipe is sucked into the cavity, and the additive and the water are dissolved together and ejected from the nozzle;

(2) The specific cutting step of the water cutting head, see patent ZL201620801114 for details.
The method for using a water cutting head of a water cutting device according to claim 7, wherein the additive in the step (1) is glycerol, an aqueous solution of glycerin, propylene glycol, an aqueous solution of propylene glycol, a sucrose solution, and a polyethylene. An aqueous alcohol solution.
The method of using a water cutting head of a water-cutting device according to claim 7, wherein in the step (1), when the additive side tube is closed, the additive directly enters the cavity from the water inlet pipe. body.