KR101872459B1 - An apparatus comprising correction apparatus for a automatic lathe - Google Patents

Abstract

The present invention relates to a processing apparatus for cutting and grinding comprising a correction apparatus for an automatic lathe, and more specifically, to a processing apparatus for cutting and grinding comprising a correction apparatus for an automatic lathe, which has an improved reliability and work efficiency for processed material by automatically and accurately correcting the thermal deformation of a ball screw, if a deformation is occurred due to heat generated from the operation of the ball screw for moving a moving means which performs various processing performances including a high precision machining, and etc.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a cutting machine or a grinding machine,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cutting or grinding machine including a correction device for an automatic lathe. More particularly, the present invention relates to a ball screw for moving a moving means for performing various machining operations, And more particularly, to a cutting or grinding machine including an automatic lathe correcting device which improves the reliability and work efficiency of a workpiece by correcting the thermal deformation of the ball screw automatically and accurately.

A general automatic lathe is an automatic operation of the work by a lathe. The operation such as the change of the spindle speed due to the difference of the shape of the workpiece, the reversing, the sending of the bar material and the sending of the cutting edge is automatically performed by the mechanism of the cam or the link As a machine suitable for mass production, there are a single-axis automatic lathe which automates the tare lathe, and a multi-axis lathe such as 4-axis, 6-axis and 8-axis main spindle.

Conventionally, a conventional automatic lathe has a function of inputting data to be processed of a workpiece into a control unit and automatically controlling the servo motor, the ball screw and the moving means according to the control of the control unit, Processed. However, in the process of the operation of the automatic lathe, the dimension of the ball screw may be changed by the heat, so that a malfunction may occur in the moving operation of the moving means, resulting in a defect in the workpiece. A dimensional correction according to the deformation must be performed.

A method of correcting a ball screw in a conventional automatic lathe, comprising the steps of: setting a selection switch to an automatic mode by operating a selection switch; pressing a cycle shaft switch of an operation panel after setting the selection switch; A step of measuring a dimension of the processed workpiece by the operator using a measuring machine to determine whether the dimension of the processed workpiece is the same as the dimension of the input data, a step of measuring the dimension of the workpiece, A step of continuously machining another workpiece when it is judged that the dimensions of the workpiece data are the same, and a step of measuring the dimension of the workpiece when the dimensions of the workpiece and the input data are not identical, And manually machining the workpiece again.

As described above, in the conventional automatic lathe, the dimension correction according to the thermal deformation of the ball screw is manually performed manually by the operator. However, in the related art, the method of correcting the ball screw of the automatic lathe can not be performed automatically, and the worker must manually correct the workpiece manually. Therefore, the work efficiency for the continuous operation is lowered and the worker always has to wait.

In addition, the correction device or correction method of an automatic lathe including the previously reported sensor or control unit itself still has the possibility of error due to thermal deformation, and more seriously, There is a technical problem that the defective rate increases rapidly after a certain amount of operation time has elapsed due to a malfunction of the sensor and the control unit due to a long time exposure to the supplied fine lubricant mist.

Since the conventional cutting oil is sprayed in the form of a fine mist in the cutting or grinding process, water-soluble cutting oil containing an amine-based compound may cause a trouble to the respiratory system of the worker. Emulsion mist can cause malfunction of many electronic equipment including sensor or control unit mounted around cutting machine or grinder, so there is a high need to solve this problem.

Korean Patent No. 10-1086610 Korean Patent No. 10-0929055 Korean Patent No. 10-1660437 Korean Patent No. 10-0329346 Japanese Laid-Open Patent Publication No. 2001-192685 Japanese Patent Application Laid-Open No. 2001-192686 Japanese Patent Laid-open No. 10-091713

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the above problems, and it is an object of the present invention to provide a ball screw, which is capable of performing various machining operations such as high precision cutting, It is possible to improve the reliability and work efficiency of the workpiece by correcting the deformation automatically and precisely, and it is also possible to minimize the electromagnetic effect on the electronic devices such as the sensor and the control unit, By adopting the emulsion supply method, the existing automatic lathe compensating device is exposed to the minute lubricating oil mist supplied to the cutting or grinding part for a long time, so that the failure rate of the sensor and the control unit is increased after some operation time has elapsed Cutting or grinding balls to solve technical problems And to provide a device.

One aspect of the present invention relates to a lubricant composition for an automatic lathe comprising (1) a lubricating base oil, (2) triethylene glycol dimethacrylate, and (3) organopolysiloxane.

Another aspect of the present invention is to provide a ball screw, (B) a moving means for moving the ball screw along the ball screw, (C) a means for correcting dimensions of the ball screw, , (D) a lubricating oil supply according to the present invention supplied to a workpiece processing portion of the moving means, (E) a lubricating oil supply means for supplying the lubricating oil to the workpiece processing portion of the moving means, 0001] The present invention relates to an automatic lathe processing machine.

As described above, in the automatic lathe correcting device and the correcting method according to the present invention, when a ball screw for moving a moving means performing various machining operations such as high precision cutting is deformed due to heat generated during operation, It is possible to improve the reliability and work efficiency of the workpiece by automatically and accurately correcting thermal deformation, as well as an emulsion capable of minimizing the electromagnetic effect on electronic devices such as sensors and control units, Supply system, the existing automatic lathe compensator is exposed to the minute lubricating oil mist supplied to the cutting or grinding part for a long time, and the sensor and the control unit malfunction, so that the defective rate rapidly increases after a certain operating time has elapsed. The problem can be solved.

FIG. 1 is a schematic view showing an essential part of an automatic lathe provided with a correction means by thermal deformation of a ball screw.
Fig. 2 is a schematic view showing an operation panel unit having a selection switch or the like to be selected by a general or automatic machining operation.
3 is a flow chart showing a correction method in the operation of an automatic lathe provided with a correction device.

Hereinafter, various aspects and various embodiments of the present invention will be described in detail with reference to the drawings and the like. However, the scope and content of the present invention can not be construed to be limited or limited by the following detailed description.

One aspect of the present invention relates to a lubricating oil composition for automatic lathe comprising 100 parts by weight of a lubricating base oil and 2 to 4 parts by weight of triethylene glycol dimethacrylate based on 100 parts by weight of the lubricating base oil and 1 to 3 parts by weight of organopolysiloxane ≪ / RTI >

Another aspect of the present invention is to provide a ball screw, (B) a moving means for moving the ball screw along the ball screw, (C) a means for correcting dimensions of the ball screw, , (D) a lubricant according to various embodiments of the present invention, which is supplied to a workpiece processing part of the moving means, (E) lubricant supply means for supplying the lubricant to the workpiece processing part of the moving device And more particularly to an automatic lathe processing machine for cutting or grinding.

(C1) a touch sensor installed at one end of the ball screw for sensing a moving position value of the moving means in contact with the moving means, and (c2) A reference coordinate set value according to the touch of the touch sensor and a difference between the measured value corresponding to the touch of the moving means and the touch sensor after the machining operation is calculated and corrected and the operation of the ball screw and the moving means is controlled according to the correction value And a control unit.

Before looking at a lubricant composition for an automatic lathe according to the present invention, an automatic lathe compensator that can be used in the present invention will be described first. However, it should be understood that the correction device for the automatic lathe described below is only one example, and other correction devices for the automatic lathe can also be used in the present invention.

An apparatus for correcting an automatic lathe that can be used in the present invention is a device for correcting an automatic lathe for correcting dimensions according to thermal deformation of a ball screw and moving means for moving a workpiece along the ball screw, A touch sensor installed on a side of the touch sensor for detecting a movement position value of the movement means in contact with the movement means and a reference coordinate set value corresponding to a contact between the movement means and the touch sensor before machining, And a control unit for controlling the operation of the ball screw and the moving means according to the correction value.

By using such an automatic lathe correcting device, the dimensions following the thermal deformation of the moving means for moving the workpiece along the ball screw are corrected through the following steps.

(S1) moving the moving means to contact the touch sensor which senses the position of the moving means, thereby setting reference coordinates for measuring the mechanical reference point after the automatic lathe manufacturing; (S2) a second step of creating and inputting the number-of-measurements data in the machining program after the first step; (S2) a third step of performing a mechanical operation after the second step and determining whether or not the number of times of measurement input in the second step has been reached; (S2) a fourth step of stopping the machining when the number of measurements is reached in the third step and executing a measurement program to measure the measurement coordinates in contact with the touch sensor when the number of measurements is reached during machining; (S2) a fifth step of determining whether the measurement coordinates measured in the fourth step are the same as the reference coordinates in the first step; (S2) determining whether the deviation value between the reference coordinate and the measurement coordinate is equal to or larger than a predetermined value in the fifth step; (S2) a seventh step of, when the deviation value is equal to or greater than a predetermined value in the sixth step, ignoring the measurement value and performing reworking based on the reference coordinates; And (S2) if the deviation value is less than or equal to a predetermined value in the seventh step, performing the correction by the deviation.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view showing a main part of an automatic lathe provided with a correction means by thermal deformation of a ball screw, which can be used in the present invention. FIG.

As shown in Fig. 1, an automatic lathe provided with a means for correcting by thermal deformation of a ball screw, which can be used in the present invention, includes a seat (not shown) for placing a workpiece to be machined, A ball screw 20 connected to the servomotor 10 for transferring a moving means 30 to be described later and mounted on the ball screw 20 to drive the servomotor 10, An operation panel unit (FIG. 2) provided with a moving means 30 for moving the ball screw 20 by the operation of the ball screw 20, a selection switch for selecting the moving means 30 as a general or automatic machining operation, A touch sensor 40 installed on one side of the distal end of the ball screw 20 to read a moving position value of the moving means 20 in contact with the moving means 20, The difference between the read value of the signal and the reference data value (Not shown) for controlling the operation of the ball screw 20 and the moving means 30 according to the correction value, and a control unit (not shown) for outputting data of the control unit to the outside and displaying it on the screen (Not shown) and data input means (not shown) for inputting data to the control unit.

At this time, the touch sensor 40 is installed at a position where the moving means 30 is in contact with the ball screw 20 in full stroke. In the process of the operation of the automatic lathe having the correction device according to the present invention, since the dimension of the ball screw 20 may be changed by heat, a correction operation must be performed.

A ball screw correction method in an automatic lathe that can be used in the present invention will now be described with reference to FIG. 3 is a flow chart illustrating a correction method in operation of an automatic lathe having a correction device according to the present invention.

As shown in the drawing, in step S1, the moving means 30 is moved in the direction of the arrow in Fig. 3 to contact the touch sensor 40, thereby setting reference coordinates obtained by measuring the mechanical reference point after machine production. Thereafter, in step S2, an operation switch is selected to select whether to execute a general machining program or an automatic machining program. If the general machining program is selected in step S2, the general machining program is executed to operate the machine in step S3. On the other hand, when the use program of the automatic correction function is selected by the sensor 40 in the step S2, the measurement number data is created and input measurement is performed, for example, measurement coordinates to be measured once after one process is repeated 10 times The process proceeds to step S4. After the step S4, the program proceeds to step S5 where the machine start operation is performed by pressing the cycle start button of the operation panel. In step S6, it is determined whether or not the number of measurements input in step S4 has been reached while the machine operation is being performed. If the number of measurements has not been reached, processing continues until the number of measurements is reached. If the number of measurements is reached in the step S6, the machining is stopped and the measurement program is executed to proceed to the step S7 of measuring the measurement coordinates touched by the touch sensor 40 when the number of measurements is reached during the machining. At this time, in the step S7, after the sample is rapidly transferred to the measurement position, a certain period is repeated three times at a low speed, and an average value is calculated. The process proceeds to step S8 where it is determined whether the measurement coordinates measured in step S7 and the reference coordinates in step S1 are the same. If it is determined in step S8 that the reference coordinates and the measured coordinates are not the same, the dimension correction is not performed during reworking. If it is determined that the reference coordinates and the measured coordinates are not the same, the deviation value is a predetermined value, The process proceeds to step S9 in which it is determined whether it is 1 mm or more. If it is determined in step S9 that the deviation value is equal to or greater than 1 mm, an error is displayed on the display unit at the same time as a warning sound, and the machine stops. It is determined in step S9 whether the deviation value is not 1 mm or more and whether the deviation value is 0.1 mm or more. If it is determined in step S10 that the deviation value is 0.1 mm or more, the measurement value is ignored and re-machining is performed based on the reference coordinates. At this time, the control device judges that there is a deviation due to an external foreign substance, disregards it, and performs re-machining. If it is determined in step S10 that the deviation value is not equal to or greater than 0.1, the process proceeds to step S11 where deviation value correction is performed by a deviation between the reference coordinates and the measured value.

The reason for performing the correction when the deviation between the reference coordinate and the measured value is not 0.1 mm or more is that the deviation value can not be larger than 0.1 mm. In other words, when the temperature rises by 1 ° C, the ball screw 20 is increased by 12 μm per 1 m. Therefore, for a stroke of 385 mm, it increases by 4.6 μm per 1 ° C rise. Therefore, when the surface temperature is 18 ° C to 20 ° C, even if the temperature rises up to 20 ° C or more, 92 μm, that is, 0.092 mm is increased. Therefore, when the deviation value is larger than 0.1 mm, it is judged as an error state. Subsequently, when the correction is performed in step S11, the automatic lathe proceeds to step S12 for automatically executing the continuous machining. After the continuous machining is performed in step S12, it is determined whether or not the number of times of the input measurement has been reached The process proceeds to step S6 to repeat the series of steps. As described above, the automatic lathe according to the present invention is capable of continuous operation by automatically correcting the dimensional change of the ball screw due to thermal deformation.

Hereinafter, the lubricant composition for an automatic lathe according to the present invention will be described in detail.

First, as described above, the lubricant composition for an automatic lathe according to the present invention comprises (1) a lubricating base oil, (2) triethylene glycol dimethacrylate, and (3) organopolysiloxane.

That is, the lubricant composition for an automatic lathe according to the present invention further comprises triethylene glycol dimethacrylate and organopolysiloxane in addition to the lubricant base oil generally used, and furthermore, 2 to 4 parts by weight of triethylene glycol dimethacrylate and 1 to 3 parts by weight of organopolysiloxane.

Thus, by using a lubricant composition for an automatic lathe, which additionally contains triethylene glycol dimethacrylate and an organopolysiloxane in addition to the lubricant base oil, in other words, for cutting or grinding according to an embodiment of the present invention By supplying the lubricant composition for an automatic lathe according to the present invention to a workpiece processing part of a moving means for moving a workpiece by moving along a ball screw in an automatic lathe machining machine, Hour or 50,000 hours), it is possible to perform a very stable machining process with low defect rate because no electromagnetic effect such as malfunction is caused in electronic devices such as a sensor and a control unit added to the automatic lathe compensating device .

The lubricant composition according to the present invention may be sprayed by itself on the working site of the workpiece, but it is more preferable that it is supplied in the form of a mist toward the processing site of the workpiece together with the compressed fluid. If it is supplied in mist form together with the compressed fluid, it is preferable to further supply water, which is 10 to 100 times the mass of the lubricant composition, to the processing part of the work.

In the method of the present invention, the material of the workpiece is not particularly limited. Further, in the conventional system, it is difficult to obtain sufficient workability when the workpiece is a non-ferrous metal. However, when the lubricant composition according to the present invention is supplied at a weight ratio of the present invention together with the compressed fluid according to the present invention, It was confirmed that sufficient workability could be obtained.

The cutting or grinding processing method of supplying the lubricating oil composition of the present invention together with the compressed fluid is capable of obtaining a good workability with little occurrence of welding while maintaining the cooling property of the workpiece without adversely affecting the environment and the human body As well as accelerated life test (ALT) results in an electronic device such as a sensor and control unit additionally attached to the automatic lathe calibrator even after a period of 1.5 to 2 times the lifetime of the machine. It is confirmed that it is possible to carry out a very stable machining process with a low defect rate because it has no electromagnetic effect such as malfunction induction.

On the other hand, mineral oils, synthetic oils, synthetic esters or vegetable oils can be used as the lubricating oil base oil contained in the emulsion composition of the present invention.

As the mineral oil, paraffinic or naphthenic mineral oils obtained by appropriately combining various purification means with the lubricating oil fraction obtained by atmospheric distillation and reduced pressure distillation of crude oil can be used.

As the synthetic oil, for example, poly-α-olefin (polybutene, 1-octene oligomer, 1-decene oligomer or the like), alkylbenzene, alkyl naphthalene, ester, polyoxyalkylene glycol, .

As the synthetic ester, for example, an aromatic ester, a dibasic acid ester, a polyol ester, a complex ester, a carbonic ester, and a mixture thereof are exemplified.

As the aromatic ester, an ester of an aromatic carboxylic acid having 1 to 6 valences and an aliphatic alcohol having 1 to 18 carbon atoms is used. Specific examples of the aromatic carboxylic acid having 1 to 6 valences include benzoic acid, phthalic acid, isophthalic acid, terephthalic acid, trimellitic acid, pyromellitic acid, and mixtures thereof. The aliphatic alcohol having 1 to 18 carbon atoms may be either linear or branched.

Examples of the dibasic acid esters include dibasic acids having 5 to 10 carbon atoms such as glutaric acid, adipic acid, pimelic acid, suberic acid, azelaic acid and sebacic acid; monohydric alcohols having 1 to 15 carbon atoms having a linear or branched alkyl group And mixtures thereof are preferably used. Specific examples thereof include ditridecyl glutarate, di-2-ethylhexyl adipate, diisodecyl adipate, ditridecyl adipate, di-2-ethylhexyl sebacate, .

As the polyol ester, a diol having an alkylene group having 2 to 12 carbon atoms or an ester of a polyol having 3 to 20 hydroxyl groups and a fatty acid having 1 to 24 carbon atoms is preferably used.

Specific examples of the polyol include trimethylol ethane, trimethylol propane, trimethylol butane, di- (trimethylol propane), tri- (trimethylol propane), pentaerythritol, di- (pentaerythritol) But are not limited to, tri- (pentaerythritol), glycerin, polyglycerin (2 to 20 moles of glycerin), 1,3,5-pentanetriol, sorbitol, sorbitan, sorbitol glycerin condensate, adonitol, arabitol, Such as polyhydric alcohols such as carboxymethylcellulose, carboxymethylcellulose, polyvinylpyrrolidone, polyvinylpyrrolidone, polyvinylpyrrolidone, polyvinylpyrrolidone, polyvinylpyrrolidone, polyvinylpyrrolidone, And saccharides such as sucrose, sucrose, sucrose, sucrose, sucrose, sucrose, sucrose, sucrose, sucrose,

Among them, polyol such as neopentyl glycol, trimethylol ethane, trimethylol propane, trimethylol butane, di- (trimethylol propane), tri- (trimethylol propane), pentaerythritol , And di- (pentaerythritol) are preferable.

As the fatty acid, those having 1 to 24 carbon atoms are generally used. Of the fatty acids having 1 to 24 carbon atoms, the number of carbon atoms is preferably 3 or more, more preferably 4 or more, and more preferably 5 or more in terms of lubricity.

In addition, any of straight-chain fatty acids and branched-chain fatty acids may be used, and linear fatty acids are preferable in terms of lubricity, and branched fatty acids are preferable in view of hydrolytic stability. Further, any of saturated fatty acids and unsaturated fatty acids may be used.

Specific examples of preferred polyol esters include esters of neopentyl glycol with valeric acid, caproic acid, enanthic acid, caprylic acid, ferric acid, capric acid, oleic acid, isopentanoic acid, 2-methylhexanoic acid, 2-ethylhexanoic acid, and 3,5,5-trimethylhexanoic acid; a diester of one or more fatty acids selected from the group consisting of trimethylolethane and valeric acid, caproic acid, enanthic acid, caprylic acid, Triesters of one or two or more fatty acids selected from the group consisting of oleic acid, oleic acid, isopentanoic acid, 2-methylhexanoic acid, 2-ethylpentanoic acid, 2-ethylhexanoic acid and 3,5,5-trimethylhexanoic acid, Trimethylol propane and at least one compound selected from the group consisting of valeric acid, caproic acid, enanthic acid, caprylic acid, ferulonic acid, capric acid, oleic acid, isopentanoic acid, 2-methylhexanoic acid, 5,5-trimethylhexanoic acid, a triester of one or more fatty acids selected from the group consisting of trimethylolbutane, Butanedioic acid, 2-ethylhexanoic acid, 3, 5, 5-trimethylpentanoic acid, 2-ethylhexanoic acid, 2-ethylhexanoic acid, Pentaerythritol and valeric acid, isopentanoic acid, caproic acid, enanthic acid, caprylic acid, ferric acid, capric acid, 2-methylhexanoic acid, Tetraester of one or more fatty acids selected from 2-ethylpentanoic acid, 2-ethylhexanoic acid, 3,5,5-trimethylhexanoic acid and oleic acid.

The ester with two or more kinds of fatty acids may be a mixture of two or more esters of one fatty acid and a polyol, or an ester of two or more mixed fatty acids and a polyol.

The polyol ester may be a partial ester in which all of the hydroxyl groups of the polyol are not esterified, a completely ester in which all the hydroxyl groups are esterified, or a mixture of partial esters and complete esters, but it is preferably a complete ester.

The complex ester refers to an ester of a fatty acid and a dibasic acid with a monohydric alcohol and a polyol and includes the same as exemplified in the description of a dibasic acid ester and a polyol ester as a fatty acid, a dibasic acid, a monohydric alcohol and a polyol Can be used.

The carbonic ester is a compound having a carbonic ester structure in the molecule. The carbonic ester structure may be one or more in one molecule.

The alcohols constituting the carbonic ester may be aliphatic alcohols, polyols and the like, and polyglycols may be added to polyglycols or polyols. In addition, carbonic acid, a fatty acid and / or a dibasic acid may be used.

As a matter of course, as the esters referred to in the present invention, they may be composed of one ester having a single structure or a mixture of two or more esters having different structures.

Of these synthetic esters, polyol esters are particularly preferable because they are excellent in biodegradability and stability.

Vegetable oils include, but are not limited to, vegetable oils such as palm oil, palm kernel oil, vegetable oil, soybean oil, high oleic vegetable oil, and high oleic vegetable oil.

Emulsions The compositions of the present invention, synthetic esters and / or if the vegetable oil as base oil, in stickiness that the castle, the iodine is in the range of 0 to 50, and bromine number in the range of 0 to 50g Br synthetic ester is in the range of ₂ / 100g, using a vegetable oil . Here, the iodine value of the ester means a value measured by the indicator titration method of JIS K 0070 "Measurement method of acid value, saponification value, ester value, iodine value, hydroxyl value and non-detection value of chemical products". Further, the bromine content of the ester means a value measured by JIS K 2605 " Chemicals - Bromide Test Method - Electrical Titration Method ".

In order to give better lubrication performance to the emulsion composition having low stickiness, it is preferable that the hydroxyl value of the ester is 0.01 to 300 mg KOH / g. The hydroxyl value is more preferably 200 mg KOH / g or less, particularly preferably 150 mg KOH / g or less, more preferably 0.1 mg KOH / g or more, still more preferably 0.5 mg KOH / g or more, More preferably not less than 1 mg KOH / g, particularly preferably not less than 3 mg KOH / g, and most preferably not less than 5 mg KOH / g. Here, the hydroxyl value of the ester means the value measured by the indicator titration method of JIS K 0070 "Method for measuring acid value, saponification value, ester value, iodine value, hydroxyl value and non-detection value of chemical products".

Further, in order to impart better lubrication performance to the emulsion composition having low stickiness, it is preferable that the saponification value of the ester is 100 to 500 mg KOH / g. The saponification value is more preferably 400 mg KOH / g or less, and still more preferably 200 mg KOH / g or more. Here, the saponification value of the ester means a value measured by the indicator titration method of JIS K 2503 " Test Method of Air Lubricating Oil ".

The kinematic viscosity of the lubricating oil base oil contained in the oil-based lubricant composition of the present invention is not particularly limited, but the kinematic viscosity at 40 캜 is preferably 200 mm ² / s or less from the viewpoint of easy supply to the machined portion (location) More preferably not more than 100 mm ² / s, even more preferably not more than 75 mm ² / s, and most preferably not more than 50 mm ² / s. The kinematic viscosity at 40 캜 of the lubricating oil base oil is preferably 1 mm ² / s or more, more preferably 3 mm ² / s or more, and most preferably 5 mm ² / s or more, from the viewpoint of workability.

The pour point and viscosity index of the lubricant base oil contained in the emulsion composition of the present invention are not particularly limited, but the pour point is preferably -20 캜 or lower, more preferably -45 캜 or lower. The viscosity index is preferably 100 or more and 200 or less.

The content of the lubricating oil base oil contained in the emulsion composition of the present invention can be appropriately selected. When synthetic ester and / or vegetable oil is used as the lubricant base oil, the content thereof is preferably 5% by mass or more, preferably 10% by mass or more, more preferably 15% by mass or more, from the viewpoint of workability and biodegradability, Mass% or more, and more preferably 20 mass% or more. From the viewpoint of stability of the emulsion, it is 95 mass% or less, preferably 70 mass% or less.

Further, the emulsion composition of the present invention may further contain conventionally known additives as cutting oil or grinding oil. Such additives include, for example, alkylphenol ethylene oxide adducts, higher alcohol ethylene oxide adducts, polyoxyethylene fatty acid esters, polypropylene glycol ethylene oxide adducts, fatty acid esters of sorbitol and sorbitan, diethylene glycol monoalkyl ethers Surfactants such as; (2,6-di-tert-butylphenol), 4,4'-bis (2,6-di-tert-butyl Phenol) and 4,4'-thiobis (6-tert-butyl-o-cresol); Oily agents such as fatty acids, alcohols and fatty acid esters; Sulfonic acid salts such as carboxylic acid, carboxylate and calcium sulfonate; corrosion inhibitors such as phosphoric acid and phosphate; Defoaming agents such as methyl silicone, fluorosilicone and polyacrylate; Sulfur-based preservatives such as sulfurized oils, sulfurized esters and polysulfides, and extreme pressure additives such as phosphoric acid esters such as phosphoric acid esters. Among these additives, it is preferable to use an oily agent such as a fatty acid, an alcohol or a fatty acid ester because the processability of the emulsion composition of the present invention can be further improved. In particular, when machining hard-wearing materials such as titanium, stainless steel and inconel, it is preferable to use sulfur-based or phosphorus-based extreme pressure agents together.

The content of the additive is not particularly limited, but it is preferable that the total content of the additive is 0.1 to 10% by mass based on the total amount of the composition.

The kinematic viscosity of the lubricating oil composition of the present invention is not particularly limited, but the kinematic viscosity at 40 캜 is preferably 80 mm ² / s or less, more preferably 70 mm ² / s More preferably not more than 60 mm ² / s, and most preferably not more than 55 mm ² / s. On the other hand, the kinematic viscosity at 40 캜 of the lubricating oil composition of the present invention is preferably 5 mm ² / s or more, more preferably 10 mm ² / s or more, and most preferably 15 mm ² / s or more .

The lubricating oil composition of the present invention can be suitably used as a lubricating agent in a micro-lubricating oil feed cutting or grinding method (MQL). In other words, the method of the present invention for supplying or cutting a lubricating oil into a lubricant includes a step of supplying the lubricant composition together with the compressed fluid toward the processing portion of the workpiece in a mist form.

In the case of MQL, a lubricating oil of several mL to several tens of mL (preferably, 1 to 90 mL / h) per hour is supplied in the form of mist to the machining portion (cutting or grinding machining portion) of the workpiece together with the compressed fluid. As the compressed fluid, it is possible to use a compressed fluid such as nitrogen, argon, helium, carbon dioxide, or the like alone or in combination with these fluids in addition to compressed air.

Further, when applying the lubricating oil composition of the present invention to MQL, it is preferable that water of 0.01 to 100 times by mass of the lubricating oil composition is supplied to the processing region of the workpiece. The amount of water to be used is more preferably 0.01 to 100 times by mass, more preferably 2 to 100 times by mass, still more preferably 3 to 50 times by mass, particularly preferably 4 to 40 times by mass, most preferably Is 5 to 30 times the mass.

The method of supplying water is not particularly limited, and may be, for example, (i) a method in which a mixture of a lubricating oil composition and water is misted and supplied with a compressed fluid, (ii) , (iii) a method in which the lubricant composition and the water are mixed after they are respectively mixed and then supplied.

The material of the workpiece to be processed by the lubricating oil composition of the present invention and the lubricating oil-feedable cutting or grinding method of the present invention is not particularly limited, but may be a non-ferrous metal, particularly aluminum and aluminum alloy, and an abrasive material such as titanium, stainless steel, Is suitable.

Hereinafter, the present invention will be described in more detail with reference to Examples and the like, but the scope and content of the present invention can not be construed to be limited or limited by the following Examples. It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the present invention as set forth in the following claims. It is natural that it belongs to the claims.

In addition, the experimental results presented below only show representative experimental results of the embodiments and the comparative examples, and the respective effects of various embodiments of the present invention which are not explicitly described below will be specifically described in the corresponding part.

Example

Hereinafter, the present invention will be described more specifically based on examples and comparative examples, but the present invention is not limited to the following examples.

Examples 1 to 15 and Comparative Examples 1 to 9

A lubricant composition having the composition shown in Tables 1 to 3 was prepared using the following lubricating base oils and additives.

(A) Base oil

A1: Trimethylol propane and octyl alcohol, decyl alcohol full ester

A2: Full ester of neopentyl glycol and octyl alcohol

A3: Full ester of pentaerythritol and decyl alcohol

A4: High oleic vegetable oil

A5: poly-? -Olefin (having a kinematic viscosity at 40 ° C adjusted to 20 mm ² / s)

(B) triethylene glycol dimethacrylate, and organopolysiloxane

B1: 2 to 3 parts by weight of triethylene glycol dimethacrylate

B2: 1 to 3 parts by weight of organopolysiloxane

(C) Alcohol

C1: oleyl alcohol

C2: Lauryl alcohol

C3: Hexaconic acid

(D) Other additives

D1: oleic acid

D2: 2,6-di-tert-butyl-p-cresol

D3: Sulfide ester

Then, the lubricating oil compositions of Examples 1 to 15 and Comparative Examples 1 to 9 were used to carry out the tests shown below.

Test Example 1: Measurement of kinetic viscosity at 40 캜

The kinematic viscosity at 40 캜 of the lubricating oil composition was measured in accordance with JIS K 2283. The results obtained are shown in Tables 1 to 3.

Test Example 2: Workability test; Tapping test

And adipic acid diisodecyl were used as comparative standard to evaluate the processing performance. Specifically, a tapping test was conducted under the following conditions by alternately using a sample oil (composition of each lubricating oil) and diisodecyl adipate.

When the emulsion was supplied to the processing site, it was sprayed directly onto the processing site at a rate of 8.5 mL / min.

Workpiece 1: Aluminum alloy (AC8A) specified in JIS H 5202

Workpiece 2: Stainless steel plate (SUS304) specified in JIS G 4305

Tool diameter: 8mm

Tap Pitch: 1.25mm

Tap inclination angle: 1.5 degrees

Tab Chamfer Angle: 10 degrees

Hole diameter under tap: 7.4mm

Number of revolutions: 360 rpm

Standard oil: DIDA (diisodecyl adipate)

In Tables 1 to 3, A to D in the column "Emulsion supply method" mean that the lubricant composition was supplied to the processing site by the following methods A to D.

A: Lubricants are supplied as mist

B: Supplied with diluted water 20 times

C: Misted lubricant is mixed in the ratio of 1 (emulsion): 10 (water) to the same misted tap water and supplied to the processing site.

D: Supplied 120 times diluted with tap water

The tapping energy in the test was measured, and the tapping energy efficiency (TEE,%) was calculated using the following equation.

Tapping energy efficiency (%) = (tapping energy in the case of using a standard oil of comparison) / (tapping energy in case of using a metalworking oil composition)

The results obtained are shown in Tables 1 to 3. The higher the value of tapping energy efficiency, the higher the lubricity.

Test Example 3: Stability Test of Emulsion

The stability of the emulsion composition was evaluated by diluting the lubricating oil agent 10 times with tap water and standing at room temperature to determine the separation behavior of the lubricating oil agent. After 24 hours, A was found to have no separation of the lubricating oil, and B when the separation oil was floating even slightly. The results obtained are shown in Tables 1 to 3.

Example 16

100 g of high oleic vegetable oil, 3 g of triethylene glycol dimethacrylate and 2 g of organopolysiloxane were mixed as a base oil for lubricating oil, and the mixture was stirred at a high speed with 500 g of water to prepare a lubricant for automatic lathe in suspension or emulsion form.

When the touch sensor and the control unit are connected to the power supply, the lubricant for the above automatic lathe is sprayed in the form of compressed mist at a rate of 85 mL / min, which is 10 times of 8.5 mL / min, Was continuously monitored for 1000 hours after the start of spraying, and as a result, it was confirmed that it was operated stably without any malfunction.

Comparative Example 10

After the lubricant was manufactured in the same manner as in Example 16 except that triethylene glycol dimethacrylate was not used, power and operating conditions of the touch sensor and the control unit were observed under the same conditions. As a result, It is confirmed that the touch sensor does not recognize the touch any more at 365 hours.

Comparative Example 11

After the lubricant was prepared in the same manner as in Example 16 except that the organopolysiloxane was not used, power and operating conditions of the touch sensor and the control unit were observed under the same conditions. As a result, It is confirmed that the power of the control unit is turned off.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions. Will be clear to those who have knowledge of.

10: Servo motor
20: Ball Screw
30: Moving means
40: touch sensor

Claims (3)

A lubricating oil composition for an automatic lathe comprising (1) a lubricating base oil, (2) triethylene glycol dimethacrylate, and (3) an organopolysiloxane,
Wherein the triethylene glycol dimethacrylate and the organopolysiloxane are contained in an amount of 2 to 4 parts by weight and 1 to 3 parts by weight based on 100 parts by weight of the lubricant base oil, respectively. (A) a ball screw, (B) a moving means for moving the workpiece along the ball screw, (C) a device for correcting an automatic lathe for correcting dimensions according to thermal deformation of the ball screw, (D) A lubricating oil composition for an automatic lathe according to any one of claims 1 to 3 supplied to a workpiece processing part of the means for supplying lubricant to the working part of the moving means; As an automatic lathe processing machine for grinding;
(C1) a touch sensor installed at one end of the ball screw to sense a moving position value of the moving means in contact with the moving means, and (c2) A control unit for calculating and correcting a difference between a reference coordinate set value according to the contact of the sensor and a measured value according to the contact between the moving means and the touch sensor after machining and controlling the operation of the ball screw and the moving means according to the correction value, / RTI >
Characterized in that the lubricant supply means feeds the lubricant composition with compressed water 10 to 100 times the mass of the lubricant composition to a machining site of the workpiece in a mist form, . 3. The method according to claim 2, characterized in that the lubricant supply means feeds the lubricant composition with compressed water 10 to 100 times the mass of the lubricant composition to the processing region of the workpiece in the form of mist Automatic Lathe Machine for Grinding.

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