JP4417055B2 - Tool cleaning method and tool cleaning device before measuring tool length - Google Patents

Description

  The present invention belongs to the technical field of machine tools. Specifically, the present invention relates to a tool cleaning method for cleaning a tool before measuring the tool length with a laser measuring instrument. The present invention also relates to a cleaning apparatus that can clean a tool before measuring the tool length with a laser measuring instrument.

  2. Description of the Related Art Machine tools that perform cutting, grinding, or polishing with a tool that rotates a workpiece made of a metal material are known. For example, a machine tool that performs a cutting process rotates a tool such as an end mill or a drill at a high speed of 10,000 rpm / min or more to bring the tool into contact with the workpiece. Recently, there is also a cutting machine that rotates a tool at a rotation speed that can be said to be “ultra-high speed” of 100,000 rpm / min. In such a machine tool, since the wear of the tool is severe, a tool with higher wear resistance is used. However, when the workpiece is made of a metal material having high hardness, the influence on the machining accuracy due to wear of the tool is unavoidable.

  In recent years, it has become commonplace to require extremely high machining accuracy with a tolerance of a slight error range of several μm at the same time as the machining time is shortened. Therefore, a situation in which the required machining accuracy cannot be obtained due to slight wear of the tool frequently occurs. Nevertheless, it is not appropriate to change the tool for every slight machining. Therefore, a method is performed in which the tool length or the tool diameter is measured after a certain amount of machining, and the relative movement trajectory of the tool is corrected by the value with which the tool is worn. The measurement of the tool length or the tool diameter can be classified into a contact method and a non-contact method. In any method, cutting powder and dust adhering to the tool cause a measurement error. For this reason, cutting powder and dust adhering to the tool must be removed before measurement.

In order to remove cutting powder and dust adhering to the tool, a method is known in which air or coolant is sprayed onto the tool as a cleaning medium before measuring the tool length or the tool diameter. Such tool cleaning methods are disclosed in, for example, Patent Literature 1, Patent Literature 2, and Patent Literature 3. Patent document 1 is disclosing the cleaning method of the tool in the measuring method of a contact system. Patent Document 2 discloses a tool cleaning method in a non-contact measurement method using a laser measuring instrument. Patent Document 3 discloses a tool cleaning method in a non-contact measurement method using a laser measuring instrument, and discloses the use of air and coolant as a cleaning medium.
Japanese Patent No. 2760986 (2nd page, 4th column, Fig. 1) JP 2001-277077 A (page 8, column 8) JP 2003-103437 A

  By the way, when measuring a tool with a laser measuring device, it has been found that erroneous measurement occurs when oil such as oil mist adheres to the measurement position of the tool. The cause may be that the laser light irradiated from the light emitter to the tool is refracted or irregularly reflected by the oil film, but it has not been clarified accurately. However, regardless of the cause, it is possible to prevent deterioration of the measurement accuracy inherent to the laser measuring instrument by removing the oil film, and in particular, to maintain the measurement accuracy when measuring the tool length. It was clarified by the experiment. Therefore, it is desirable to effectively remove the oil film adhering to the tool. Moreover, when cleaning a tool before a measurement, it is expected that an operator's hand is not bothered as much as possible.

  Conventionally, it has been known that a method for cleaning a tool with air is insufficient for removing cutting powder and dust adhering to the tool even if the air jet pressure is considerably increased. Therefore, a method for cleaning the tool with the coolant is preferably selected. However, when the coolant is an aqueous liquid, the oil film adhered to the tool cannot be removed. When the coolant is an oily liquid, it is not suitable for removing viscous oils and the coolant forms an oil film in the first place. In particular, in a machine tool such as a vertical machining center, there is a high possibility that coolant remains at the tip of a tool that is a measurement position, and accurate measurement cannot be performed at all. Therefore, a tool cleaning method using a coolant as a cleaning liquid is effective for washing away cutting powder and dust, but is not suitable for oil removal. In the case of a so-called dry-type cutting machine that does not use coolant, it is not suitable to clean the tool with coolant because it does not have a device for processing used coolant.

  In view of the above-mentioned problems, the present invention provides a novel and suitable tool cleaning method and cleaning apparatus capable of effectively removing oil adhering to a tool before measurement in a machine tool capable of measuring the tool length with a laser measuring instrument. The purpose is to do.

In order to solve the above-described problems, the tool cleaning method of the present invention is basically a tool cleaning method for cleaning a tool in order to measure the tool length of the tool with a laser measuring instrument. The tool (2) is sprayed from the container (70) in which a volatile or quick-drying degreasing agent is hermetically sealed and sprayed onto the tool (2) vertically arranged in the form of a mist by degreasing the degreasing agent. Wash to remove oil film. Preferably, the degreasing detergent is sprayed for 1 second to 5 seconds.

  Further, the cleaning method for a tool of the present invention is a tool cleaning method for cleaning a tool in order to measure the tool length of the tool with a laser measuring instrument. Before performing the measurement, a volatile or quick-drying degreasing cleaner is airtight. The degreasing cleaning agent is sucked up from the tank (71) enclosed in the nozzle, and the degreasing cleaning agent is sprayed from the nozzle (91) into a vertically arranged tool (2) by the force of compressed air controlled to a predetermined pressure. The tool (2) is cleaned by spraying and the tool length is measured.

The tool cleaning method of the present invention is a tool cleaning method prior to measuring the tool length, in which the sprayer (90) of the cleaning device (10) for cleaning the tool (2) is replaced with a machine tool main unit or an automatic tool changer. A step of attaching to the device (ATC, Automatically Tool Changer), a step of setting the control position of the nozzle (91) of the sprayer (90) attached to the machine apart from the laser measuring device in the control device (1), A step of interrupting machining at a predetermined time point, and a step of relatively moving the tool (2) to a control position of the nozzle (91) set so as to face the nozzle (91) with a predetermined gap. , A step of spraying a volatile or quick-drying degreasing agent horizontally on at least a measurement position of the tool (2) arranged vertically from the nozzle (91), and the tool (2) as a sensor of the laser measuring device (3) (SE) provided And a step of relatively moving to a predetermined position and a step of measuring the tool length of the tool (2) by the laser measuring device (3).

Moreover, the tool cleaning apparatus of the present invention is a tool cleaning apparatus for cleaning a tool in order to measure the tool length of the tool with a laser measuring device. The tool cleaning apparatus includes an air supply source (20) and an air supply source (20). An air regulator (40) that compresses air to a predetermined pressure, an airtight container (70) that encloses a volatile or quick-drying degreasing detergent, and the above-mentioned degreasing detergent is pumped from the airtight container (70). 40) and a sending device (60) for sending out together with the compressed air enclosed in compressed air or an airtight container (70), and the above-mentioned degreasing detergent installed away from the laser measuring device (3) and from the sending device (60). and a sprayer which injects horizontally tool (2) arranged vertically in the mist (90), the solenoid valve to restrict the supply of compressed air from the air regulator (40) and (50), the atomizer ( Including a setting device for setting the control position of the nozzle (91) of 0), the processing is temporarily interrupted at a preset timing, and the tool (2) is relatively moved to the control position of the nozzle (91). The solenoid valve (50) is opened and degreased from the nozzle (91) to the tool (2) after being positioned at a predetermined position facing the nozzle (91) with a predetermined gap and spaced horizontally from the tip of the nozzle (91). And a control device (1) for controlling the spraying of the degreased cleaning agent by injecting the cleaning agent and closing the solenoid valve (50) after a predetermined time .

Moreover, the tool cleaning apparatus of the present invention is a tool cleaning apparatus for cleaning a tool in order to measure the tool length of the tool with a laser measuring device. The tool cleaning apparatus includes an air supply source (20) and an air supply source (20). An air regulator (40) for compressing air to a predetermined pressure, an airtight tank (71) for storing a volatile or quick-drying degreasing cleaner, and the above-mentioned degreasing from the airtight container (70) by the action of compressed air Vacuum device (61) that sucks up the cleaning agent and sends the degreasing cleaning agent together with compressed air, and the defatted cleaning agent in the form of a mist by the pressure of the compressed air from the vacuum device (61) installed away from the laser measuring device (3) to the tool sprayer which injects horizontally (2) (90) arranged longitudinally, the solenoid valve to restrict the supply of compressed air from the air regulator (40) and (50), the atomizer (90 Including a setting device for setting the control position of the nozzle (91) of the nozzle (91), the processing is temporarily interrupted at a preset timing, the tool (2) is relatively moved to the control position of the nozzle (91), and the nozzle ( 91) is disposed opposite to the nozzle (91) with a predetermined gap and positioned at a predetermined position in the horizontal direction, and then the solenoid valve (50) is opened to remove the degreasing cleaner from the nozzle (91) to the tool (2). And a control device (1) for controlling to close the solenoid valve (50) after a predetermined time and stop spraying the degreasing detergent .

Moreover, the tool cleaning apparatus of the present invention is a tool cleaning apparatus for cleaning a tool in order to measure the tool length of the tool with a laser measuring device. The tool cleaning apparatus includes an air supply source (20) and an air supply source (20). An air regulator (40) that compresses air to a predetermined pressure, an air cylinder (62) that is operated by compressed air from the air regulator (40), and a laser measuring device (3) that are installed separately from the volatile or quick-drying property The degreasing cleaner is sealed together with compressed gas, and the nozzle (91) is pressed by the cylinder of the air cylinder (62), whereby the degreasing cleaner is sprayed in a horizontal direction onto the tool (2) arranged vertically. a sprayer (90) comprising a spray can (72) to the solenoid valve to restrict the supply of compressed air from the air regulator (40) and (50), a nozzle (9 sprayer (90) ) Including a setting device for setting the control position, the processing is temporarily interrupted at a preset timing, and the tool (2) is relatively moved to the control position of the nozzle (91), and the nozzle (91) is predetermined. The solenoid valve (50) is opened after being positioned at a predetermined position that is opposed to the nozzle (91) in the horizontal direction and is opposed to the nozzle (91), and a degreasing detergent is sprayed from the nozzle (91) onto the tool (2). And a control device (1) for controlling to close the solenoid valve (50) after time and stop spraying the degreasing detergent . In addition, the said code | symbol is attached | subjected for convenience and this invention is not restrict | limited to embodiment disclosed by the corresponding drawing.

  The tool cleaning method of the present invention is a tool in which a volatile or quick-drying degreasing agent is used as a medium for cleaning the tool before the tool length is measured by a laser measuring instrument, and the degreasing cleaner is arranged in the vertical direction. It sprays in the form of a mist at the measurement position. Therefore, for example, the degreasing agent sprayed on the downwardly arranged tool ensures that the oil adhering to the measurement position of the tool is washed away from the measurement position together with the cutting powder, and the degreasing agent is quickly volatilized without hardening. Or dry. Therefore, the viscous oil is washed away from the measurement position of the tool and the degreasing cleaner itself does not interfere with the measurement. In addition, since the degreasing detergent is mixed with air or compressed gas at a predetermined pressure and supplied, the degreasing detergent supplied in a mist form from the ejector is necessary and sufficient for a short time over the entire measurement position of the tool. Applied. Therefore, the degreasing detergent supplied while cutting powder is blown off does not increase more than necessary. For this reason, the cutting powder is unlikely to remain at the measurement position, and the liquid flowed to the tip of the tool does not accumulate. As a result, it is possible to prevent an erroneous measurement of the laser measuring instrument due to the oil film, and it is possible to obtain an excellent effect that high processing accuracy can be maintained without reducing the work efficiency.

  The tool cleaning apparatus of the present invention has a configuration in which a volatile or quick-drying degreasing agent is sprayed and applied to a tool arranged in a vertical direction in a mist form. Therefore, for example, the degreasing agent sprayed on the downwardly arranged tool ensures that the oil adhering to the measurement position of the tool is washed away from the measurement position together with the cutting powder, and the degreasing agent is quickly volatilized without hardening. Or dry. Therefore, the viscous oil is washed away from the measurement position of the tool and the degreasing cleaner itself does not interfere with the measurement. In addition, since the degreasing detergent can be supplied by mixing with air or compressed gas at a predetermined pressure, the degreasing detergent supplied in a mist form from the ejector can be vigorously applied in a short time over the entire measurement position of the tool. It is applied enough. For this reason, the cutting powder is unlikely to remain at the measurement position, and the liquid flowed to the tip of the tool does not accumulate. As a result, according to the tool cleaning apparatus of the present invention, it is possible to prevent an erroneous measurement of the laser measuring instrument due to the oil film, and it is possible to maintain a high machining accuracy without reducing the work efficiency. Is obtained.

  When the degreasing detergent is sucked up and sent out from an airtight storage tank such as a tank for storing the degreasing detergent, and the degreasing detergent is supplied to the tool by the jet output of the compressed air, a pump or a compressor that consumes electric power is used. The degreasing detergent can be sprayed in the form of a mist without using a cylinder filled with gas. Therefore, it has effects such as excellent cost performance. Moreover, since control by a control apparatus is possible, an operator's hand is not bothered and the erroneous measurement of the laser measuring device by an oil film can be prevented. As a result, it is possible to obtain an excellent effect that the burden on the operator is further reduced and high machining accuracy can be maintained without lowering the work efficiency.

  In addition, when the degreasing cleaner enclosed in a container such as a spray can is pressed against the nozzle of the spray can by a cylinder and the degreasing cleaner is supplied to the tool with a compressed gas spray output, a commercially available spray is used. Cans can be used as they are. Moreover, since control by a control apparatus is possible, an operator's hand is not bothered and the erroneous measurement of the laser measuring device by an oil film can be prevented. As a result, it is possible to obtain an excellent effect that the burden on the operator is further reduced and high machining accuracy can be maintained without lowering the work efficiency.

  FIG. 1 shows a preferred embodiment of the tool cleaning apparatus of the present invention. The machine tool illustrated in FIG. 1 is a vertical machining center having a structure in which a tool is reciprocated in a vertical direction by a machining head provided with a spindle, and a workpiece is moved in two horizontal axes by a saddle and a table. . FIG. 1 omits a specific apparatus of the cutting machine main machine that is not directly related to the cleaning apparatus of the present invention. When applied to a machine tool having an overall configuration different from that of the embodiment shown in FIG. 1, it is necessary to replace the name of the axis, the moving direction of the tool, or the type of the tool. Can be installed. In FIG. 1, the sensor of the laser measuring device and the sprayer of the cleaning device are shown side by side.

  The numerical control device 1 is an example of a control device that corrects the relative position by cleaning the tool 2 and measuring the tool length. The numerical controller 1 obtains tool length and tool diameter measurement data from a length measurement signal from a laser measuring device 3 including a sensor SE having a light emitter and a light receiver. Then, the numerical controller 1 compares the measurement data with the tool length and tool diameter data of the tool 2 when it is new, and calculates the wear amount data of the tool 2. The tool length and tool diameter data of the tool 2 attached when it is new is set in advance by a setting device (not shown) included in the numerical control device 1. The measured measurement data and the calculated wear amount data are stored in a storage device (not shown) included in the numerical controller 1.

  Further, the numerical control device 1 calculates a correction value for the relative movement of the tool from the measured wear amount data of one or more tools 2. The position data on the relative movement locus of the tool calculated based on the machining program is corrected by the calculated correction value. The corrected position data is output to the movement control device 4. When the wear amount data exceeds an allowable value, the numerical control device 1 outputs an alarm for prohibiting the use of the tool, or operates an automatic tool changer (not shown) to exchange for a new tool. The movement control device 4 includes a servo motor 6 that moves the machining head 5 based on the position data output from the numerical control device 1 (the embodiment employs an AC synchronous linear motor) and an induction that rotates the spindle. The motor 7 is controlled.

  The movement control device 4 positions the machining head 5 by controlling at least the servo motor 6 based on a feedback signal detected by a position detector 8 such as a linear scale. The movement control device 4 can control the rotation of the spindle based on a feedback signal obtained by a speed detector 9 that detects a rotational speed by obtaining a signal from a rotation detector such as a rotary encoder. Similar to the servo motor 6, the movement control device 4 controls a plurality of servo motors that move a saddle and a table not shown in FIG. 1 in synchronization or independently.

  The cleaning apparatus 10 sprays the degreasing cleaner in a mist state and sprays horizontally toward the tool 2 by the pressure of a mixed gas of compressed air or gas mixed with a volatile or quick-drying degreasing cleaner. As in the embodiment, since the vertical machining center is mounted downward with the tool 2 facing downward, the tool 2 is arranged vertically as it is. Therefore, the degreasing cleaner sprayed from the direction perpendicular to the tool 2 removes the oil adhering to the measurement position by washing it away toward the tip of the tool 2 together with the cutting powder. On the other hand, since the degreasing detergent is supplied in the form of a mist, the degreasing detergent itself volatilizes or dries quickly without forming a liquid film or a liquid pool. If the tool 2 is not arranged vertically, there is a possibility that the oil blended with the degreasing detergent will not flow and remain in the measurement position as it is. 2 are arranged vertically. As described above, the cleaning device according to the embodiment is configured to spray the degreasing detergent horizontally in the mist state at the measurement position of the tool arranged vertically, so that the oil is surely removed from the measurement position of the tool. Can do.

  The degreasing agent suitable for the present invention is limited to those having volatility or quick-drying property that can remove oils and fats from the tool. This type of degreasing detergent includes aromatic hydrocarbons, alcohols, ketones, ethers, and other mixed hydrocarbon solvents such as those that can be quickly dried such as methanol and acetone. A highly degreased and highly volatile solvent is well known, but a degreasing detergent mainly composed of a solvent mainly composed of aliphatic hydrocarbons is suitable for the cleaning method and apparatus of the present invention. . More specific degreasing cleaners are available on the market, as there are many volatile or quick-drying degreasing agents suitable for removing oils and fats adhering to the tool. Since it can be confirmed and the effect can be easily confirmed by conducting a test, an appropriate one is selected and adopted by the user. However, most of the degreasing cleaners mainly composed of organic solvents are flammable and have a lot of effects on the human body. Therefore, strictly observe the usage in accordance with relevant laws and handle them with sufficient care.

  In addition, the degreasing detergent which has the volatility or quick-drying property which has the degreasing effect of the fats and oils adhering to the tool other than the said organic solvent can be used. On the other hand, degreasing cleaners that are prohibited or markedly restricted by law and that have little effect of washing away oils and fats from metal tools (for example, those that have a degreasing effect only on resin) or are not volatile or quick-drying are applicable Not. For example, soaps, synthetic detergents, and detergents mainly composed of surfactants are excluded because they are not quick-drying or cannot easily remove oils and fats attached to tools.

  The cleaning device 10 includes an air source 20, an air regulator 40, a solenoid valve 50, a delivery device 60, an airtight container 70, and a sprayer 90. As shown in FIG. 1, the sprayer 90 includes a nozzle 91 including a conduit 93 and a mounting base 92. Description of other members provided in the circuit such as a throttle valve and a check valve is omitted. The cleaning apparatus 10 according to the embodiment can spray the degreasing cleaning agent vigorously including gas. Therefore, the degreasing agent spreads over a wide range in a short time to the measurement position of the tool, and at the same time, blows away the cutting powder and dust adhering to the tool and removes them. Therefore, the effect of washing off the oil is great, and the amount of the degreasing detergent used for one cleaning can be reduced.

  The air source 20 is a device that pressurizes and sends out air such as a compressor. The air regulator 40 compresses air from the air source 20 and supplies compressed air controlled to a predetermined pressure. The solenoid valve 50 is a control valve having at least an input / output for controlling the flow of compressed air by electromagnetically opening and closing it. The opening and closing of the solenoid valve 50 is controlled by the numerical controller 1 through an opening / closing controller (not shown). The delivery device 60 pumps up the liquid degreasing detergent at a predetermined flow rate, introduces compressed air and mixes it with the degreasing detergent, and sends the degreasing detergent together with the compressed air to the sprayer 90. The airtight container 70 stores a liquid degreasing detergent together with gas in an airtight chamber. The airtight container 70 is, for example, a tank, a cylinder, or a can. The filter 30 is for removing dust and dust from the compressed air. The speed controller 80 controls the flow rate of the compressed air mixed with the degreasing detergent supplied to the sprayer.

  The atomizer 90 has a nozzle 91 including a conduit 93. The mounting base 92 to which the conduit 93 is fixed is provided with a magnet on the lower surface, and the sprayer 90 is installed on a table (not shown) or a surface plate provided on the table. The mounting base 92 is a manifold into which a mixed gas in which a degreasing detergent is mixed with compressed air or gas is introduced. The nozzle 91 is provided with one or more fine holes. Therefore, the degreasing detergent to be ejected becomes mist-like because it is suddenly released from the pressure of air or gas when discharged from the nozzle. The fine holes are oriented in a direction substantially perpendicular to the mounting direction of the tool 2 arranged downward so that the tip is on the lower side. Preferably, the shape of the opening portion of the fine hole is formed so that the sprayed defatted degreasing agent is jetted in a wide range so that the degreasing detergent is hard to be hardened in one place.

  Before the tool length of the tool 2 is measured by the laser measuring device 3, the cleaning device 10 described above is operated, so that the degreasing cleaner is atomized from the airtight container 70 in the direction perpendicular to the tool 2. It sprays and the tool 2 is cleaned with a degreasing detergent and gas. As already described, the configuration of the cleaning apparatus according to the embodiment enables oil and fat to be removed in a short time. Therefore, 2 seconds to 5 seconds is sufficient for spraying the degreasing detergent only on the measurement position of the tool. In a short time of 1 second or less, the amount of the degreasing detergent is insufficient, and the oil is not washed away, so that the effect is insufficient. For a long time of more than ten seconds, the cleaning effect of fats and oils is low for a large amount of degreasing detergent supplied. In particular, if the degreasing agent has a low flash point or contains harmful substances, the spraying time should be as short as possible to reduce the amount of degreasing agent used. When measuring the tool length, the measurement position of the tool is the tip of the tool, and when measuring both the tool length and the tool diameter, the position of several mm from the tip of the tool is the measurement position. Since the degreasing agent is sprayed at least at the measurement position of the tool, the oil film that causes erroneous measurement can be reliably removed.

  Next, a preferred specific embodiment of the cleaning method using the tool cleaning apparatus of the present invention will be described with reference to FIG. The cleaning apparatus uses the cleaning apparatus 10 shown in FIG. First, the sprayer 90 is previously installed at a position that does not interfere with processing, and is connected to the delivery device 60 with a flexible hose (S1). Preferably, the sprayer 90 is attached to a specific set position on a table or a surface plate. Further, the set value of the device such as the air regulator 40 is set to an appropriate value in advance (S2). For example, the air regulator 40 is set to about 1 to 2 kg / cm2. Then, the control position of the nozzle 91 is set by a setting device (not shown) of the numerical controller 1 (S3). At this time, as described above, when the sprayer 90 is attached to a specific set position, the control position of the nozzle 91 can be set without an operator input.

  Next, for example, a machining program such as an NC program is programmed to execute a “measuring process” for measuring the tool length or tool diameter by the laser measuring device 3 and a “cleaning process” for cleaning the tool before the measurement. (S4). This step substantially sets when the cleaning of the tool 2 and the measurement of the tool length and the like are executed. When the cleaning process and the measurement process are performed can be performed in a specific cycle. For example, it is performed after the completion of repeated machining processes such as roughing and finishing. Moreover, it can set with processing time. However, when setting by the processing time, it is required that the processing is not interrupted during the processing in the processing step.

  After performing the above-described setting, the cleaning device 10 is activated before processing (S5). When the tool 2 is ready for cleaning, machining is started (S6). The series of processing is temporarily interrupted at the timing preset in step S4 (S7). When the machining is stopped, in order to clean the tool 2, a moving body such as a table is moved, and the tool 2 is relatively moved so as to be opposed to the nozzle 91 with a predetermined gap (S8). When cleaning only the measurement position of the tool 2, depending on the size of the tool 2 and the amount of the degreasing agent sprayed per unit time, the position is approximately 5 cm to 20 cm away from the tip of the nozzle 91 in the horizontal direction. The tip of the tool 2 is positioned. Since the embodiment is a vertical machining center, the tool 2 is already arranged in the downward direction so that the tip is on the lower side, and the tool 2 may be moved relative to the three-axis direction as it is. However, when the tool 2 is not arranged vertically, it is necessary to rotate the tool 2 so as to be arranged vertically.

  When the tool 2 is positioned at a predetermined position, the solenoid valve 50 is opened, compressed air is supplied to the delivery device 60, mixed with the degreasing detergent, and the compressed air containing the degreasing detergent is sent to the sprayer 90, and the nozzle A degreasing detergent is sprayed from 91 to the tool 2 in a mist form (S9). At this time, the degreasing detergent can be sprayed on the entire surface of the tool 2 by raising the tool 2 while rotating it at the number of rotations during processing (S10). However, as described above, this step is omitted because it is sufficient that the oil film is removed by spraying the degreasing agent at least on the measurement position of the specified tool 2 where the laser measuring device 3 irradiates the laser beam. it can.

  A predetermined time after spraying the degreasing detergent, the solenoid valve 50 is closed to stop spraying the degreasing detergent (S11). As an embodiment, 2 to 5 seconds is set as a suitable time for spraying the degreasing detergent only on the measurement position of the tool 2. When step S10 is incorporated in the cleaning process and the tool 2 is moved with respect to the nozzle 91 to spray the degreasing detergent on the entire surface of the tool 2, the degreasing cleaning is performed when the relative movement is completed over the entire circumference of the tool 2. Stop spraying agent. In the cleaning method of the embodiment, the degreasing detergent is discharged together with the pressurized gas, so that the processing powder and dust are blown away and the degreasing detergent is supplied to the entire measurement position of the tool 2 in a short time. Efficiently wash away the oil and fat remaining on the measurement position and the remaining processed powder.

  After the cleaning process, the tool 2 is moved to a position where the sensor SE of the predetermined laser measuring device 3 is attached (S12), and the tool 2 is rotated at the same rotational speed as at the time of machining and idling for a predetermined time. The tool length or the tool diameter is measured (S13). Although idling is not essential, it is better to eliminate measurement errors. At least before the tool 2 is moved to the sensor SE after the cleaning of the tool 2 is finished, the degreasing detergent sprayed on the surface of the tool 2 is dried and removed. As described above, when the tool 2 is measured by the laser measuring instrument 3, since the oil and fat adhering to the measurement position of the tool 2 is removed, there is almost no possibility of erroneous measurement. The measurement result is used to calculate the correction value of the tool length and the tool diameter and correct the position on the relative movement locus of the tool 2 for the next machining (S14). Further, when the tool 2 is abnormally worn, the information can be used for an alarm or automatic tool change. A method for calculating the correction value and correcting the position based on the correction value is arbitrary. After the measurement of the tool 2, the paused machining is resumed (S15).

  The cleaning method of the present invention can be carried out in combination with a cleaning method in which compressed powder is used to blow off the work powder adhering to the tool, or a coolant is used to wash out the work powder and dust attached to the tool. When cleaning a tool with a coolant, it is required to first clean with a coolant and then clean with a degreasing cleaner. In particular, when an oil-based coolant is used, the coolant may collect at the tip of the tool at the measurement position without dripping from the tool. Therefore, by using the cleaning method of the present invention, an excellent tool cleaning effect is obtained. I can expect that.

  As for the washing | cleaning apparatus of this invention, the installation place of a sprayer is not limited. For example, a nebulizer can be attached to an automatic tool changer. In addition, the cleaning process of the tool in the cleaning method of the present invention is based on the premise that the tool is used for processing and before the measurement of the tool length by the laser measuring instrument. Therefore, for example, the tool once used for processing and waiting in the magazine can be washed during standby.

  FIG. 3 shows another embodiment. The embodiment shown in FIG. 3 is the same as the basic configuration shown in FIG. As in FIG. 1, FIG. 3 omits a specific device of the cutting machine main machine that is not directly related to the cleaning device of the present invention. The cleaning device 11 shown in FIG. 3 is a tank 71 in which a delivery device is a vacuum device 61 and an airtight container is a storage tank. Members denoted by the same reference numerals as those shown in FIG. 1 are basically the same.

  Specifically, the vacuum device 61 sucks up the degreasing detergent from the tank 71 by the action of the compressed air supplied from the air regulator 40, and sends out the degreasing detergent together with the compressed air. The pressure of the compressed air introduced into the vacuum device 61 causes a pressure difference between the pressure in the vacuum chamber and the atmosphere. A thin tube connected to the vacuum chamber of the vacuum device 61 is introduced into the liquid degreasing detergent stored in the airtight tank 71. Therefore, the degreasing detergent is sucked into the vacuum chamber by the pressure difference. At this time, since the pipe line is open to one side of the vacuum chamber, the compressed air escapes in the direction of the open pipe line. Accordingly, the sucked degreasing detergent is mixed with the compressed air and led out of the vacuum device 61 from the vacuum chamber. The mixture of the degreasing detergent and the compressed air sent out from the vacuum device 61 is adjusted in flow rate by the speed controller 80 and reaches the sprayer 90.

  The configuration of the vacuum device 61 as the delivery device and the tank 71 as the airtight container can be replaced with another configuration. For example, although not shown, the degreasing cleaning agent enclosed in the airtight container can be pumped up using a pump such as a vacuum pump, mixed with compressed air in a mixer, and then sent out. . However, since the cleaning device is an accessory device in a machine tool, it is desirable that the configuration be simpler unless there are special circumstances. In the configuration of the embodiment, the degreasing detergent can be sprayed in the form of a mist without using a pump that consumes electric power or a cylinder filled with gas.

  A control signal is sent from the numerical controller 1 through an opening / closing controller (not shown) to open the solenoid valve 50. The degreasing detergent is sucked up from the tank 71 at a predetermined flow rate by the action of the compressed air from the air regulator 40, and the compressed air and the degreasing detergent are mixed. When the compressed air controlled to a predetermined pressure mixed with the degreasing detergent is released from the nozzle 91, the degreasing detergent is sprayed in the horizontal direction in the form of a mist. As described above, before the measurement by the laser measuring device 3, the degreasing detergent is sucked up from the tank 71 in which the degreasing detergent is hermetically sealed, and the degreasing detergent is controlled by a compressed air force controlled to a predetermined pressure. Since the tool 2 can be degreased and cleaned by spraying from 91, the oil film adhering to the tool 2 is effectively removed.

  FIG. 4 shows another embodiment. The cleaning apparatus shown in FIG. 4 is the same as the basic configuration shown in FIG. In FIG. 4, as in FIG. 3, a specific device of the cutting machine main machine not directly related to the cleaning device of the present invention is omitted. As for the washing | cleaning apparatus 12 shown by FIG. 4, the delivery apparatus is the cylinder 62, and the spray can 72 is provided as an airtight container which also serves as a sprayer. Members denoted by the same reference numerals as those shown in FIG. 1 are basically the same.

  A spray gas (isohexane, propane, etc.) is enclosed in the spray can 72 together with the degreasing cleaner. The spray can 72 uses a spray can of a commercially available degreasing cleaner. Although the purchased spray can can be used as it is, it is preferable to replace the nozzle of the spray can 72 with a dedicated nozzle 91 suitable for spraying the degreasing cleaner on the tool. When the nozzle 91 attached to the spray can 72 is pushed, a pipe provided in the spray can 72 is pushed to open the flow path. The spray can 72 is mounted by being pushed into a fastener 94 provided on a magnet base that can be attached to the machine.

  The cleaning device 12 controls the opening and closing of the electromagnetic valve 50 with the numerical control device 1 and operates the air cylinder 62 with the compressed air whose flow rate is controlled by the speed controller 80. When the cylinder of the air cylinder 62 is pushed out, the cylinder presses the nozzle 91. When the nozzle 91 is pushed, the pipe of the spray can 72 connected to the nozzle 91 is pushed and the flow path is opened. When the flow path is opened, the compressed gas plays the role of compressed air, and the degreasing detergent is injected from the nozzle 91 by the pressure of the gas. Therefore, this embodiment has an advantage that a commercially available spray can can be used.

FIG. 5 shows another embodiment. The cleaning apparatus shown in FIG. 5 is the same as the basic configuration shown in FIG. The cleaning apparatus shown in FIG. 5 is a mode in which the cleaning apparatuses shown in FIGS . 1 and 4 are combined. Specifically, in the cleaning device 13, the delivery device is a cylinder 62 and the airtight container is a spray can 72 as in the cleaning device shown in FIG. 4. Further, the sprayer 90 in the same way as the cleaning apparatus shown in Figure 1 is installed. The spray can 72 and the sprayer 90 are connected by a flexible hose. Gas is enclosed in the spray can 72 together with the degreasing cleaner. As the spray can 72, a spray can of a commercially available degreasing detergent can be used. Since the commercially available spray can 72 is generally provided with a nozzle for spraying the degreasing cleaner, the dedicated sprayer 95 that does not spray the degreasing cleaner is replaced.

  The opening and closing of the solenoid valve 50 is controlled by the numerical controller 1 and the air cylinder 62 is operated by compressed air whose flow rate is controlled by the speed controller 80. When the cylinder of the air cylinder 62 is pushed out, the cylinder presses the nozzle 95 of the spray can 72. When the nozzle 95 is pushed, the tube of the spray can 72 connected to the nozzle 95 is pushed to open the flow path, and the degreasing detergent is supplied to the sprayer 90 through the flexible hose by the pressure of the compressed gas. Therefore, this embodiment has an advantage that a commercially available spray can can be used only by replacing the nozzle.

  In FIG. 6, a tool with no oil and fat, a tool with an oil film, and a tool with oil and fat adhered and degreased and washed with the tool cleaning method of the present invention were measured with a laser length measuring device. The results of comparing the measurement errors of the laser length measuring instrument are shown. The machine tool used was a “MC430L” vertical machining center (manufactured by Sodick), the tools were φ6 mm and φ2 mm carbide end mills, and the laser length measuring device was a “P67.0634-014” length measuring device (made by Blum). Moreover, the degreasing detergent used is a brand name "Bightle Clean" (distributor Keih Et S), and is an isooctane (2,2,4-trimethylpentane) organic solvent (aliphatic hydrocarbons). . As already mentioned, the degreasing agent used in the present invention removes oils and fats adhering to the surface of the tool and then volatilizes or dries quickly, leaving no liquid film or liquid pool. It is limited to.

  Rotating at a spindle speed of 10,000 rpm / min, oil mist is intentionally injected for 30 minutes, idling is performed for 30 minutes to eliminate variations due to thermal displacement, and then the tool length is continuously measured by a laser measuring instrument. And performed 10 times. In addition, with the cleaning method as shown in FIG. 2, the defatted cleaning agent in a mist form is removed from a position approximately 15 cm horizontally away from the tip of the tool, which is the measurement position, at a position 2 mm away from the tool tip. Sprayed for 3 seconds. Then, idling was performed for 30 minutes in the same manner, and then the tool length was continuously measured 10 times with a laser measuring instrument. In measurement of tool length, when an average measurement error of 17 μm occurs in a φ6 mm super steel end mill and an average of 26 μm in a φ2 mm super steel end mill, the measurement error is eliminated to less than 1 μm by the cleaning method of the example. It was.

  The tool cleaning method and tool cleaning device before measuring the tool length according to the present invention are implemented in a technical field related to a machine tool that performs cutting, grinding, and polishing with a tool that rotates a workpiece made of a metal material. can do. When measuring the tool length by measuring the tool with a laser measuring instrument, the present invention effectively removes oil and fat adhering to the measurement position of the tool, which is considered to be one of the causes of erroneous measurement, to prevent erroneous measurement. To do.

It is the simplified block diagram which shows suitable embodiment of the cleaning apparatus of the tool of this invention. It is a flowchart which shows an example of the process of the cleaning method of the tool of this invention. It is the simplified block diagram which shows the washing | cleaning apparatus of another embodiment of this invention. It is the simplified block diagram which shows the washing | cleaning apparatus of another embodiment of this invention. It is the simplified block diagram which shows the washing | cleaning apparatus of another embodiment of this invention. It is a comparative table | surface which shows the effect of the Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Numerical control apparatus 2 Tool 3 Laser measuring instrument 20 Air source 40 Air regulator 50 Electromagnetic valve 60 Delivery apparatus 70 Airtight container 90 Nebulizer 91 Nozzle

Claims (4)

In the method of cleaning the tool before measuring the tool length, the step of attaching the sprayer of the cleaning device for cleaning the tool to the machine tool main machine or the automatic tool changer, and the nozzle of the sprayer attached to the machine apart from the laser measuring device A step of setting a control position in the control device, a step of interrupting machining at a predetermined time point, and a control position of the nozzle set so as to be opposed to the nozzle with a predetermined gap. A step of relatively moving the tool, a step of spraying a volatile or quick-drying degreasing agent horizontally on at least a measurement position of the tool arranged vertically from the nozzle, and a sensor of a laser measuring instrument. A tool before measuring a tool length, comprising: a step of relatively moving to a predetermined position provided; and a step of measuring the tool length of the tool by the laser measuring instrument. Cleaning method. In a tool cleaning apparatus for cleaning the tool to measure the tool length of the tool with a laser measuring instrument, an air supply source, an air regulator that compresses air from the air supply source to a predetermined pressure, and volatile or An airtight container filled with a quick-drying degreasing detergent, a delivery device for pumping the degreasing detergent from the airtight container and sending it together with the compressed air from the air regulator or the gas enclosed in the airtight container; and the laser A sprayer that is installed apart from the measuring device and sprays the degreasing cleaning agent in a mist form from the delivery device in a horizontal direction onto the tool, and a solenoid valve that restricts the supply of the compressed air from the air regulator And a setting device for setting the control position of the nozzle of the sprayer, the processing is temporarily interrupted at a preset timing, and the nose The tool is relatively moved to a control position of the nozzle, and the nozzle is positioned at a predetermined position facing the nozzle with a predetermined gap and spaced horizontally from the tip of the nozzle, and then the electromagnetic valve is opened to move the nozzle from the nozzle. And a controller for controlling the spraying of the degreasing detergent to stop the spraying of the degreasing detergent by injecting the degreasing detergent onto the tool and closing the solenoid valve after a predetermined time . In a tool cleaning apparatus for cleaning the tool to measure the tool length of the tool with a laser measuring instrument, an air supply source, an air regulator that compresses air from the air supply source to a predetermined pressure, and volatile or An airtight tank for storing quick-drying degreasing detergent, a vacuum device for sucking up the degreasing detergent from the airtight container by the action of the compressed air and sending the degreasing detergent together with the compressed air, and the laser measurement A sprayer that sprays the degreasing cleaning agent in a mist form and is sprayed horizontally with the pressure of the compressed air from the vacuum device installed away from the vacuum vessel, and supply of the compressed air from the air regulator a solenoid valve for limiting the processing at a timing that is set in advance includes a setting device for setting a position on the control of the nozzle of the sprayer The electromagnetic valve is opened after the tool is moved to a position on the control of the nozzle relative to the nozzle and positioned at a predetermined position facing the nozzle with a predetermined gap and spaced horizontally from the tip of the nozzle. And a controller for controlling the spraying of the degreasing agent to be stopped by spraying the degreasing agent from the nozzle onto the tool and closing the solenoid valve after a predetermined time . In a tool cleaning apparatus for cleaning a tool for measuring a tool length of a tool with a laser measuring instrument, an air supply source, an air regulator for compressing air from the air supply source to a predetermined pressure, and the air regulator An air cylinder that is operated by compressed air from the laser, and a volatile or quick-drying degreasing agent that is installed apart from the laser measuring instrument together with gas, and the nozzle is pressed by the cylinder of the air cylinder so that the degreasing cleaning is performed. An atomizer made of a spray can that sprays the agent in a vertical direction on the tool arranged vertically in the form of a mist, a solenoid valve that restricts the supply of the compressed air from the air regulator , and the nozzle of the atomizer Including a setting device for setting the position, the processing is temporarily interrupted at a preset timing, and the control position of the nozzle is set. The degreasing cleaning agent is moved from the nozzle to the tool by opening the electromagnetic valve after the recording tool is moved relative to the nozzle with a predetermined gap and positioned in a horizontal position away from the tip of the nozzle. And a control device that controls to close the solenoid valve and stop spraying the degreasing detergent after a predetermined time .

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