CN109084162A - The selectable lubricating system of cutting fluid and lubricating method - Google Patents

Abstract

The invention provides a lubricating system and a lubricating method with optional cutting fluid, belonging to the field of cutting processing; it is mainly used for lubricating a tool when a machine tool is performing cutting processing. The above lubricating system includes an air compressor, a controller and three oil-air mixing injection devices. The air compressor supplies compressed air to the oil-air mixing injection device; the oil-air mixing injection device is used to mix compressed air and cutting fluid and lubricate the cutting tool ; The controller can control the switching of the oil-air mixed spraying device, so as to replace the cutting fluid. The lubricating method obtained through the above-mentioned design of the present invention adopts the above-mentioned lubricating system; its degree of automation is relatively high; it is very convenient and efficient to replace the cutting fluid.

Description

Optional lubrication system and lubrication method for cutting fluid

technical field

The invention relates to the field of cutting processing, in particular to a lubrication system and a lubrication method with optional cutting fluid.

Background technique

The cutting fluid used in large quantities in the traditional machining process has brought various disadvantages to the environment, including the following three aspects: first, environmental pollution, cutting fluid is the root cause of environmental pollution in the machining industry; second, energy and resource consumption , Relevant surveys show that the cost of cutting fluid accounts for 7-17% of the total processing cost of the workpiece; third, it endangers the health of workers. The cutting fluids widely used at present contain more or less harmful chemical components.

The machine tool sometimes needs to replace the cutting fluid in the oil tank of the minimum quantity lubrication system when processing different workpieces. The operation is cumbersome, resulting in a lot of time wasted.

Contents of the invention

The object of the present invention is to provide a lubrication system with optional cutting fluid, which is convenient for changing the cutting fluid.

Another object of the present invention is to provide a lubricating method using the above lubricating system.

The present invention is achieved like this:

A cutting fluid optional lubrication system, including an air compressor, a controller, and at least two oil-air mixing spray devices;

The air compressor communicates with the oil-gas mixing and eruption device through a main pipe, and the main pipe is provided with an air source processor and a main pipe solenoid valve;

The oil-gas mixing eruption device includes a branch pipe, an oil-gas mixer, an oil supply device and a spray head, one end of the branch pipe communicates with the main pipe, and the other end communicates with the oil-gas mixer;

The oil supply device communicates with the branch pipe through the first connecting pipe, and communicates with the oil-gas mixer through the second connecting pipe;

The branch pipe is provided with a branch pipe electromagnetic valve, which is used to control the on-off of the main pipe and the oil-gas mixing eruption device;

The controller is electrically connected with the air compressor, the main pipe solenoid valve, the branch pipe solenoid valve and the oil supply device respectively.

further,

The oil supply device includes an oil tank, a pneumatic pump, and a pneumatic frequency generator, and the pneumatic frequency generator is arranged on a first connecting pipe, and the first connecting pipe is connected to the second connecting pipe through the pneumatic pump; The pneumatic pump communicates with the oil tank.

further,

The spray head is connected with the oil-air mixer through a hose.

further,

The spray head includes a conical tube, and the big end of the conical tube is connected with the oil-gas mixer.

further,

An operation panel is included, and the operation panel is electrically connected with the controller.

further,

The fuel tank is arranged above the pneumatic pump, and the fuel tank communicates with the pneumatic pump through a vertically arranged guide tube; the upper end of the guide tube is connected with the bottom of the fuel tank, and is higher than the the bottom of the tank;

The upper end of the draft tube is provided with a liquid level monitoring device, and the liquid level monitoring device includes a lower cover plate, an upper cover plate, a buoy and a pull rope, and the lower cover plate is provided with a middle through hole and an edge through hole, The edge through holes are distributed around the middle through holes; diversion holes are arranged on the upper cover plate, and the inner diameter of the diversion holes is smaller than the inner diameter of the diversion pipe;

The guide tube passes through the middle through hole, the edge through hole is provided with a containing cylinder, one end of the containing cylinder is provided with a sealing plate, the other end passes through the edge through hole, and is connected with the lower The upper surface of the cover is flush;

A tension spring is arranged inside the containing cylinder, one end of the tension spring is connected with the sealing plate, and the other end is connected with the upper cover plate; the tension spring makes the upper cover plate connect the guide Flow tube plugging;

The buoy is in the shape of a cylindrical shell and is connected to the upper cover through the pull rope.

further,

A tension sensor is arranged on the lower cover, and the tension sensor is electrically connected to the controller.

further,

The upper end of the guide pipe is provided with a filter screen and a sealing ring.

A lubricating method, which utilizes the lubricating system, is characterized in that it comprises the following steps:

a. Pre-store the tool model and the cutting fluid model information corresponding to the tool model in the storage unit of the controller; each tool corresponds to one or more cutting fluid models;

b. Input the tool model information actually used by the machine tool into the controller, and the controller matches the corresponding cutting fluid according to the tool model; when matching multiple cutting fluid models, then screen a cutting fluid according to the workpiece material;

c. Open the corresponding oil-air mixing injection device, air compressor and dry pipe solenoid valve according to the matched cutting fluid information.

further,

Before step c, the controller first detects the liquid level of the corresponding oil supply device for detection;

, before step c, the controller first detects the liquid level of the corresponding oil supply device for detection;

Step a also includes establishing an evaluation system for cutting fluid selection and formulating the selectivity P. When the selectivity is higher, it is considered that the cutting fluid is more suitable for the selection of the current working condition, and it is made

P＝w ₁ F(S)+w ₂ F(T)+w ₃ F(R)+w ₄ F(D)

Among them, F(S), F(T), F(R), and F(D) are the comprehensive effects of tool material, tool type, material to be processed, and processing type on time, cost, quality, resources, and environment, respectively. w ₁ , w ₂ , w ₃ , and w ₄ are the weight values respectively, which are obtained by analyzing methods such as the analytic hierarchy process.

The beneficial effects of the present invention are:

In the lubricating system obtained through the above-mentioned design of the present invention, different cutting fluids are stored in different oil-gas mixing and spraying devices. When the lubricating fluid needs to be replaced, different oil-air mixing spray devices can be started to provide cutting fluid by directly controlling the on-off of the solenoid valve on the branch pipe. Moreover, since the micro-quantity lubrication technology is adopted, the above-mentioned lubricating system has low use cost, less waste, less environmental pollution and high safety.

The lubricating method obtained by the above-mentioned design in the present invention adopts the above-mentioned lubricating system; its degree of automation is relatively high; it is very convenient and efficient to replace the cutting fluid.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation on the scope, and those skilled in the art can also obtain other related drawings based on these drawings without creative work.

Fig. 1 is the schematic diagram of the principle of the lubrication system provided by Embodiment 1 of the present invention;

2 is a schematic structural view of the oil supply device in the lubrication system provided by Embodiment 1 of the present invention;

3 is a schematic structural view of the oil supply device in the lubrication system provided by Embodiment 2 of the present invention;

4 is a cross-sectional view of a liquid level monitoring device and a draft tube in a lubrication system provided by Embodiment 2 of the present invention;

Fig. 5 is a flow chart of the lubrication method provided by Embodiment 3 of the present invention.

Icons: 1-air compressor; 2-air source processor; 3-dry pipe solenoid valve; 4-branch pipe; 5-branch pipe battery valve; 6-oil supply device; 61-pneumatic pump; 62-liquid level alarm; 63-pneumatic frequency generator; 64-oil tank; 65-liquid level monitoring device; 66-first connecting pipe; 67-second connecting pipe; 653-Buoy; 654-Rope; 655-Accommodating cylinder; 656-Tension sensor; 657-Tension spring; 7-Oil pressure regulator; 8-Oil-air mixer; 9-Oil-air mixing regulating valve; 11 - Nozzle.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments It is some embodiments of the present invention, but not all of them. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

Accordingly, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. Based on the implementation manners in the present invention, all other implementation manners obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

In the description of the present invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying No device or element must have a particular orientation, be constructed, and operate in a particular orientation, and therefore should not be construed as limiting the invention.

In the present invention, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection" and "fixation" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated; it can be mechanically connected or electrically connected; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction relationship between two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is usually placed when the product of the invention is used, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying References to devices or elements must have a particular orientation, be constructed, and operate in a particular orientation and therefore should not be construed as limiting the invention. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions, and should not be construed as indicating or implying relative importance.

In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", and it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the present invention, unless otherwise clearly specified and limited, the first feature above or below the second feature may include that the first and second features are in direct contact, and may also include that the first and second features are not in direct contact but is through additional feature contacts between them. Moreover, the first feature on, above and above the second feature includes the first feature directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature being below, below and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

Example 1:

As shown in Fig. 1 , this embodiment provides a lubricating system, which is mainly used for lubricating the cutting tool when the machine tool is cutting. The above lubricating system includes an air compressor 1, a controller and three oil-air mixing spraying devices. The air compressor 1 supplies compressed air to the oil-gas mixing spraying device; the oil-gas mixing spraying device is used to mix compressed air and cutting fluid and clean the tool Lubrication; the controller can control the switching of the oil-air mixing spray device to replace the cutting fluid.

Specifically, please continue to refer to FIG. 1 , an air compressor 1 is connected with a main pipe for delivering compressed air to the oil-gas mixing and spraying device; an air source processor 2 and a main pipe solenoid valve 3 are arranged on the main pipe. The air source processor 2 includes a barometer, a throttle valve and a filter assembly, which mainly regulates the pressure of the compressed air output on the main pipe and filters water and the like. The solenoid valve is electrically connected with the controller, and the controller can remotely control the on-off of the solenoid valve, thereby controlling the on-off of the compressed air flow on the dry pipe.

Please continue to refer to FIG. 1 , the oil-gas mixing eruption device includes a branch pipe 4 , an oil-gas mixer 8 , an oil supply device 6 and a nozzle 11 , one end of the branch pipe 4 communicates with the main pipe, and the other end communicates with the oil-gas mixer 8 . The oil supply device 6 is provided with a first connecting pipe 66 and a second connecting pipe 67 , the first connecting pipe 66 communicates with the branch pipe 4 , and the second connecting pipe 67 communicates with the oil-gas mixer 8 . A part of the compressed air in the branch pipe 4 enters the oil supply device 6 through the first connecting pipe 66; Oil. Another part of the compressed air in the branch pipe 4 mixes with the lubricating oil from the second connecting pipe 67 to form an oil-air mixture. And, branch pipe 4 is provided with branch pipe 4 solenoid valves, and branch pipe 4 solenoid valves are arranged on the upstream of branch pipe 4, and are used to control the on-off of main pipe and oil-gas mixing eruption device; To control the switching of different oil-gas mixing eruption devices.

Specifically, please refer to FIG. 2 , the oil supply device 6 includes an oil tank 64 and an air pump 61 , and the oil tank 64 is arranged above the air pump 61 . The bottom of fuel tank 64 is provided with guide tube 68, and the upper end of guide tube 68 is connected with the bottom of fuel tank 64, and is higher than the end of fuel tank 64, prevents that the sediment at the bottom of fuel tank 64 enters the starting pump through guide tube 68 In this way, the service life of the pneumatic pump 61 is improved, and the nozzle 11 is prevented from being blocked. One end of the first connecting pipe 66 is connected to the branch pipe 4, and the other end is connected to the pneumatic pump 61; part of the compressed air in the branch pipe 4 enters the pneumatic pump 61 through the first connecting pipe 66, and the pneumatic pump 61 is driven by the compressed air. The lubricating oil delivered by the guide pipe 68 is delivered to the oil-air mixer 8 through the second connecting pipe 67 . The outlet of the oil-gas mixer 8 is connected with the conical nozzle 11 through the hose 10, so that the oil-air mixture is delivered to the tool and the workpiece; The frame moves synchronously.

In addition, the controller may be a PLC, and this embodiment does not describe the PLC in detail.

The use method and working principle of the optional lubrication system for cutting fluid provided in this embodiment are as follows:

First fill different types of cutting fluid into different oil tanks 64, and then determine the appropriate cutting fluid according to the specific type of tool and workpiece; then open the main pipe solenoid valve 3 and the corresponding branch pipe 4 battery valve, pneumatic pump 61 . Part of the compressed air enters the pneumatic pump 61 to drive the pneumatic pump 61 to pump the cutting fluid in the oil tank 64 into the oil-air mixer 8, and the other part of the compressed air directly enters the oil-air mixer 8; the compressed air and cutting fluid are mixed in the oil-air Mixed in the container 8 to form a mixture of oil and gas, and through the hose 10 and the nozzle 11 to reach the workpiece and the tool.

The above-mentioned lubrication system adopts the micro-lubrication technology, that is, a small amount of pollution-free lubricant is mixed into the compressed air instead of a large amount of cutting fluid to cool and lubricate the cutting point, and the fixed-point micro-lubrication is carried out through the small hole of the nozzle 11. The lubrication effect is obvious and can be Effectively suppress tool wear, prolong tool life, and have the advantages of low cost, less waste, less environmental pollution, and high safety. In addition, the machine tool sometimes needs to replace the cutting fluid in the oil tank 64 of the minimal quantity lubrication system when processing different workpieces. The switch can be switched, which greatly improves the efficiency and reduces the cost.

Example 2:

As shown in FIG. 3 , this embodiment provides a lubrication system with optional cutting fluid, which is basically the same as that in Embodiment 1, except that a liquid level monitoring device 65 is installed in the oil tank 64 . The above liquid level monitoring device 65 is used to automatically alarm and seal the guide tube 68 when the liquid level in the fuel tank 64 is lower than the preset liquid level; when the liquid level in the fuel tank 64 is higher than the preset water level, the liquid level monitoring device 65 can automatically open the draft tube 68 and disarm the alarm.

Specifically, please refer to FIG. 3 and FIG. 4 , the liquid level monitoring device 65 includes a lower cover 651 , an upper cover 652 , a buoy 653 and a pull cord 654 . Both the upper cover plate 652 and the lower cover plate 651 are circular plates, and the upper cover plate 652 covers the lower cover plate 651 . The lower cover 651 is provided with a middle through hole and an edge through hole, and the edge through holes are distributed around the middle through hole; the middle of the upper cover 652 is provided with micro through holes.

The guide tube 68 passes through the middle through hole, and the edge through hole is provided with a receiving tube 655 , one end of the receiving tube 655 is provided with a sealing plate, and the other end of the receiving tube 655 passes through the edge through hole, and is flush with the upper surface of the lower cover plate 651 . A tension spring 657 and a tension sensor 656 are arranged inside the containing cylinder 655 , the tension sensor 656 is disposed on the sealing plate, one end of the tension spring 657 is connected to the tension sensor 656 , and the other end is connected to the upper cover plate 652 . The tension spring 657 makes the upper cover plate 652 block the flow guide tube 68 . The buoy 653 is in the shape of a cylindrical shell, and is connected to the upper cover 652 through a pull rope 654 .

When the liquid level is low, the buoyancy force received by the float 653 is small; under the action of the tension spring 657, the upper cover plate 652 and the lower cover plate 651 are sucked together; at this time, the tensile force received by the tension sensor 656 is less than the minimum threshold value, Indicates that the liquid level is too low, the tension sensor 656 transmits the information to the controller, and the controller gives an alarm. When the liquid level is low, the upper cover plate 652 automatically blocks the guide plate, and the cutting fluid enters the guide tube 68 from the guide hole on the upper cover plate 652, and the flow rate decreases. The above design can automatically reduce the flow rate when the liquid level is low, preventing the air pump 61 from being damaged after the air pump 61 drains the lubricating liquid; moreover, the lubrication system can continue to work while adding cutting fluid.

When the liquid level is higher than the preset water level, the buoyancy of the buoy 653 is relatively large, and the buoy 653 pulls the upper cover 652 through the pull rope 654, and pulls the upper cover 652 away, and the tension spring 657 is further pulled by the pull rope 654, The tension of the tension sensor 656 is greater than the minimum threshold; when the tension of the tension sensor 656 is greater than the maximum threshold, it means that the liquid level is higher than the warning level, the tension sensor 656 transmits the information to the controller, and the controller gives an alarm.

Further, the buoy 653 includes a cylinder body, an upper end cover and a lower end cover, and the upper end cover and the lower end cover are respectively detachably connected to the two ends of the cylinder body; counterweights are arranged in the cylinder body, and the preset value can be changed by changing the quantity or quality of the counterweights. The height of water level and warning water level. In addition, since the tension spring 657 and the tension sensor 656 are both disposed in the containing cylinder 655 , the overall liquid level control device is relatively compact and does not affect the cooperation between the upper cover 652 and the lower cover 651 . In addition, the above-mentioned liquid level control device has a simple overall structure and is convenient for maintenance.

Implementation 3:

Please refer to Fig. 5, the present embodiment provides a kind of lubricating method, and it mainly adopts the lubricating system in embodiment 1, comprises the following steps:

a. Pre-store the tool model and the cutting fluid model information corresponding to the tool model in the storage unit of the controller; each tool corresponds to one or more cutting fluid models. And establish the evaluation system of cutting fluid selection and formulate the selectivity P. When the selectivity is higher, it is considered that the cutting fluid is more suitable for the selection of the current working conditions.

P＝w ₁ F(S)+w ₂ F(T)+w ₃ F(R)+w ₄ F(D)

Among them, F(S), F(T), F(R), and F(D) are the comprehensive effects of tool material, tool type, material to be processed, and processing type on time, cost, quality, resources, and environment, respectively. w ₁ , w ₂ , w ₃ , and w ₄ are the weight values respectively, which are obtained by analyzing methods such as the analytic hierarchy process.

b. Input the tool model information actually used by the machine tool into the controller, and the controller will match the corresponding cutting fluid according to the tool model; when matching multiple cutting fluid models, then screen a cutting fluid according to the workpiece material.

c. When the actual liquid level is lower than the preset liquid level, the alarm will alarm and add cutting fluid; when the actual liquid level is higher than the preset liquid level, the corresponding oil-air mixing injection device and air compressor will be turned on according to the matched cutting fluid information Machine 1 and dry pipe solenoid valve 3.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. The lubrication system with the selectable cutting fluid is characterized by comprising an air compressor, a controller and at least two oil-gas mixing and spraying devices;

the air compressor is communicated with the oil-gas mixing and spraying device through a main pipe, and an air source processor and a main pipe electromagnetic valve are arranged on the main pipe;

the oil-gas mixing and spraying device comprises a branch pipe, an oil-gas mixer, an oil supply device and a spray head, wherein one end of the branch pipe is communicated with the main pipe, and the other end of the branch pipe is communicated with the oil-gas mixer;

the oil supply device is communicated with the branch pipe through a first connecting pipe and is communicated with the oil-gas mixer through a second connecting pipe;

the branch pipe is provided with a branch pipe electromagnetic valve for controlling the on-off of the main pipe and the oil-gas mixing and spraying device;

the controller is respectively electrically connected with the air compressor, the main pipe electromagnetic valve, the branch pipe electromagnetic valve and the oil supply device.

2. The cutting fluid selectable lubrication system of claim 1, wherein:

the oil supply device comprises an oil tank, a pneumatic pump and a pneumatic frequency generator, wherein the pneumatic frequency generator is arranged on a first connecting pipe, and the first connecting pipe is connected with a second connecting pipe through the pneumatic pump; the pneumatic pump is communicated with the oil tank.

3. The cutting fluid selectable lubrication system of claim 1, wherein:

the spray head is connected with the oil-gas mixer through a hose.

4. The cutting fluid selectable lubrication system of claim 1, wherein:

the spray head comprises a conical pipe, and the large end of the conical pipe is connected with the oil-gas mixer.

5. The cutting fluid selectable lubrication system of claim 1, wherein:

the controller comprises an operation panel which is electrically connected with the controller.

6. The cutting fluid selectable lubrication system of claim 2, wherein:

the oil tank is arranged above the pneumatic pump and communicated with the pneumatic pump through a vertically arranged guide pipe; the upper end of the flow guide pipe is connected with the bottom of the oil tank and is higher than the bottom of the oil tank;

a liquid level monitoring device is arranged at the upper end of the flow guide pipe and comprises a lower cover plate, an upper cover plate, a buoy and a pull rope, a middle through hole and edge through holes are formed in the lower cover plate, and the edge through holes are distributed around the middle through hole; the upper cover plate is provided with a flow guide hole, and the inner diameter of the flow guide hole is smaller than that of the flow guide pipe;

the honeycomb duct penetrates through the middle through hole, an accommodating cylinder is arranged in the edge through hole, one end of the accommodating cylinder is provided with a sealing plate, and the other end of the accommodating cylinder penetrates through the edge through hole and is flush with the upper surface of the lower cover plate;

an extension spring is arranged in the accommodating cylinder, one end of the extension spring is connected with the sealing plate, and the other end of the extension spring is connected with the upper cover plate; the extension spring enables the upper cover plate to plug the flow guide pipe;

the buoy is in a cylindrical shell shape and is connected with the upper cover plate through the pull rope.

7. The cutting fluid selectable lubrication system of claim 6, wherein:

the accommodating barrel is internally provided with a tension sensor which is electrically connected with the controller, and the tension sensor can be triggered when the upper cover plate is matched with the lower cover plate.

8. The cutting fluid selectable lubrication system of claim 6, wherein:

the buoy comprises a cylinder body, an upper end cover and a lower end cover, and the upper end cover is detachably connected with the cylinder body; the lower end cover is connected with the cylinder body; a balance weight is arranged in the barrel.

9. A lubrication method using the lubrication system according to any one of claims 1 to 8, characterized by comprising the steps of:

a. pre-storing the cutter type and cutting fluid type information corresponding to the cutter type into a storage unit of a controller; each cutter corresponds to one or more types of cutting fluid;

b. inputting the information of the tool model actually used by the machine tool into a controller, and matching the corresponding cutting fluid by the controller according to the tool model; when various cutting fluid models are matched, screening one cutting fluid according to the workpiece material;

c. and opening the corresponding oil-gas mixing eruption device, the air compressor and the main pipe electromagnetic valve according to the matched cutting fluid information.

10. The lubrication method according to claim 9, wherein before the step c, the controller detects the liquid level of the corresponding oil supply device;

step a, establishing an evaluation system for cutting fluid selection, formulating a selection degree P, considering that the cutting fluid is more suitable for selection of the current working condition when the selection degree is higher, and enabling the cutting fluid to be more suitable for selection of the current working condition

P＝w₁F(S)+w₂F(T)+w₃F(R)+w₄F(D)

Wherein, F (S), F (T), F (R) and F (D) are respectively the comprehensive influence of cutter material, cutter type, material to be processed and processing type factors on time, cost, quality, resources and environment, and w₁、w₂、w₃、w₄The weighted values are obtained by analyzing by methods such as a hierarchical analysis method and the like.