KR102670691B1 - Spindle system for monitering of processing and tool state - Google Patents

Abstract

The spindle system capable of monitoring machining status and tools according to the present invention is a spindle system including a spindle rotating inside a main shaft body and a support portion that prevents the spindle from leaving, and includes a plurality of spindles that retract or protrude from the spindle and hold the tool. A gripper having legs; a length detector for detecting the length of the tool is disposed at the bottom of the gripper, and the length detector is disposed on the inner surface of the detector housing, with upper and lower portions penetrating so that the tool can penetrate through the detector housing. It consists of a light emitting sensor and a light receiving sensor that detects the length of the tool.
The present invention has the effect of placing a light receiving sensor and a light emitting sensor at the bottom of the spindle and placing a marker on the tool to monitor the wear condition of the tool through changes in the amount of light detected by the light receiving sensor.

Description

Spindle system capable of monitoring processing status and tools {SPINDLE SYSTEM FOR MONITERING OF PROCESSING AND TOOL STATE}

The present invention relates to a spindle system for processing a workpiece by combining tools, and in particular, to a system capable of monitoring the machining state of the workpiece and the status of the tool.

A typical spindle system for machine tools processes a workpiece after attaching a tool to a rotating spindle. When repeatedly machining a workpiece, wear of the tool coupled to the spindle may occur, and damage to the tool may occur due to malfunction, uneven properties of the workpiece, etc. Damage occurs.

When machining is performed using worn or damaged tools, not only does machining efficiency decrease, but the workpiece is processed differently from the design, necessitating correction and reprocessing. Therefore, in order to solve this problem, the workpiece is processed within the specified tool life.

However, the lifespan of a given tool is set considering only the normal workpiece and the specified processing method. If the workpiece is not uniform or a method other than the specified processing method must be used, wear and damage of the tool are continuously monitored. shall.

In addition, the processing status of the workpiece must be continuously monitored.

Republic of Korea Open Utility Model No. 20-1998-0025850 (published on August 5, 1998)

As devised to solve this problem, the present invention seeks to monitor the wear state of tools.

In addition, we want to monitor damage to the tip of the tool and monitor the machining status of workpieces processed using tools other than the tip of the tool.

The spindle system capable of monitoring machining status and tools according to the present invention is a spindle system including a spindle rotating inside a main shaft body and a support portion that prevents the spindle from leaving, and includes a plurality of spindles that retract or protrude from the spindle and hold the tool. A gripper having legs; a length detector for detecting the length of the tool is disposed at the bottom of the gripper, and the length detector is disposed on the inner surface of the detector housing, with upper and lower portions penetrating so that the tool can penetrate through the detector housing. It consists of a light emitting sensor and a light receiving sensor that detects the length of the tool.

The length detection unit of the spindle system capable of monitoring the processing status and tool according to the present invention is connected to the control unit, and the control unit preferably determines the length of the tool using the increase or decrease in the amount of light detected by the light receiving sensor as a factor.

The spindle system of the spindle system capable of monitoring the processing status and tools according to the present invention is placed on a frame and moves up and down, and the frame has a monitoring unit disposed at the bottom of the spindle system to photograph the bottom of the tool attached to the spindle system. A transfer bed is placed between the system and the monitoring unit to transport the workpiece while supporting both ends, and when the spindle system moves horizontally, it is desirable for the monitoring unit to be synchronized so that it can photograph the bottom of the tool of the spindle system and the machining point of the workpiece. .

The monitoring unit of the spindle system capable of monitoring the processing status and tool according to the present invention includes a monitoring housing with a transparent upper surface, a camera, a mirror, and a deflection prism disposed inside the monitoring housing, and the optical axis of the camera for photographing the bottom of the tool is It is desirable to form the bottom of the tool, the deflection prism, and the mirror in that order.

A light that irradiates light in an upward direction is disposed on the upper surface of the monitoring housing of the spindle system capable of monitoring processing status and tools according to the present invention or between the upper surface and the deflection prism, and on the upper part of the transfer bed is adjacent to the tool side. A suction nozzle is placed to suck in the scrap generated during the processing of the workpiece. A pressure sensor is placed on the suction nozzle to sense the pressure inside the suction nozzle and transmit it to the control unit. The control unit measures the pressure inside the suction nozzle transmitted from the pressure sensor. If it is above the standard value, it is advisable to judge the tool as damaged.

If the control unit of the spindle system capable of monitoring the processing status and tool according to the present invention determines that the tool is damaged when the pressure inside the suction nozzle is above the standard value, the control unit determines that the image acquired from the camera when the pressure inside the suction nozzle is above the standard value It is advisable to re-determine damage to the tool using .

The present invention has the effect of placing a light receiving sensor and a light emitting sensor at the bottom of the spindle and placing a marker on the tool to monitor the wear condition of the tool through changes in the amount of light detected by the light receiving sensor.

In addition, installing a monitoring unit consisting of a camera and lighting at the bottom of the spindle has the effect of checking tool damage and monitoring the processing status of the workpiece.

In addition, a nozzle is installed on the spindle side that can suck in scraps generated during processing of the workpiece to remove scrap generated during processing of the workpiece, while preventing damage to the tool through changes in pressure when sucking scrap. There is an effect that can be monitored.

In addition, there is an effect of reducing the load generated when the monitoring unit is always in operation by interconnecting the pressure change generated when scrap is sucked and the operation of the monitoring unit consisting of a camera and lighting.

1 is a cross-sectional view of a spindle system capable of monitoring machining conditions and tools according to an embodiment of the present invention.
Figure 2 is a configuration diagram of a spindle system capable of monitoring machining status and tools according to an embodiment of the present invention.
FIGS. 3A and 3B are conceptual diagrams of the operation of the spindle system capable of monitoring the processing status and tool shown in FIG. 2.
Figure 4 is a configuration diagram of a spindle system capable of monitoring machining status and tools according to another embodiment of the present invention.
Figure 5 is a graph showing the pressure of the suction nozzle shown in Figure 4.

Specific structural or functional descriptions of the embodiments are disclosed for illustrative purposes only and may be modified and implemented in various forms. Accordingly, the embodiments are not limited to the specific disclosed form, and the scope of the present specification includes changes, equivalents, or substitutes included in the technical spirit.

Terms such as first or second may be used to describe various components, but these terms should be interpreted only for the purpose of distinguishing one component from another component. For example, a first component may be named a second component, and similarly, the second component may also be named a first component.

When a component is referred to as being “connected” to another component, it should be understood that it may be directly connected or connected to the other component, but that other components may exist in between.

Singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, terms such as "comprise" or "have" are intended to designate the presence of the described features, numbers, steps, operations, components, parts, or combinations thereof, but are not intended to indicate the presence of one or more other features or numbers, It should be understood that this does not exclude in advance the possibility of the presence or addition of steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the relevant technical field. Terms as defined in commonly used dictionaries should be interpreted as having meanings consistent with the meanings they have in the context of the related technology, and unless clearly defined in this specification, should not be interpreted in an idealized or overly formal sense. No.

Hereinafter, an embodiment according to the present invention will be described in detail with reference to the attached drawings.

Referring to FIG. 1, which is a cross-sectional view of the spindle system capable of monitoring processing status and tools according to an embodiment of the present invention, the spindle system 100 includes a spindle 120 rotating inside the main shaft body 110, It includes a support portion 130 that prevents the spindle 120 from being separated.

At the lower part of the spindle 120, the main shaft body 110 is installed a gripper 140 having a plurality of legs 142 to grip the tool T as shown in FIG. 1, and the gripper 140 A length detection unit 150 that detects the length of the tool T is disposed at the bottom of .

As explained earlier, the tool (T) is subject to wear when processing the workpiece, so it must be replaced after the specified usage time has elapsed. However, in cases where the material of the workpiece is not uniform or when processing is performed using a method different from the specified method, etc. The tool (T) may wear out sooner or later than the designated usage time.

The degree of wear of the tool (T) can be confirmed by detecting the length of the tool (T). In order to detect the length of the tool (T), the present invention uses a detection unit housing ( 151), the light emitting sensor 152 and the light receiving sensor 154 are placed on the inner surface of the light emitting sensor 152, and the light emitted from the light emitting sensor 152 is reflected from the outer surface of the tool (T) and detected by the light receiving sensor 154. 150) can be used to detect it.

This length detection unit 150 is connected to a control unit (not shown) that determines the length of the tool T using the increase or decrease in the amount of light detected by the light receiving sensor 154 as a factor.

For example, when the tool (T) is worn, a difference in length occurs with the unworn tool (T), and when the tool (T) with the difference in length is rotated, a difference in length is formed on the outer surface of the tool (T). The trajectory appears with a slight difference, and this difference in trajectory causes a difference in the amount of light emitted from the light emitting sensor 152, reflected from the outer surface of the tool T, and then incident on the light receiving sensor 154. Wear of the tool (T) is determined through changes in the amount of light sensed by the light receiving sensor 154 of the present invention.

The control unit is connected to the light receiving sensor 154 and can determine the degree of wear using the change in the amount of light of the light receiving sensor 154 as a factor. At this time, the control unit is connected to a database storing light quantity change data through the light receiving sensor 154 when the tool (T) rotates and length changes, and determines the wear of the tool (T) by comparing it with the data in the database.

This spindle system 100 is a schematic diagram of the spindle system capable of monitoring the machining state and tools according to an embodiment of the present invention, and FIG. 2 is a schematic diagram of the operation of the spindle system capable of monitoring the machining state and tools shown in FIG. 3A and 3B, it can be placed on a frame (F) so that it can move up and down, and the frame (F) has a tool (T) attached to the spindle system 100 at the bottom of the spindle system 100. A monitoring unit 300 that photographs the bottom surface is disposed.

The length detection unit 150 described above determines the wear of the tool (T) through the length of the tool (T), and cannot check the condition of the cutting tip at the bottom of the tool (T). However, the monitoring unit 300 directly detects the wear of the tool (T). The condition of the cutting tip can be monitored by taking pictures of the bottom of (T) and the cutting tip.

A transfer bed 200 is disposed between the spindle system 100 and the monitoring unit 300 to transport the workpiece W while supporting both ends, so that the workpiece W can be transferred to the lower part of the spindle system 100. there is.

The spindle system 100 can basically move up and down, and depending on the embodiment, it can move in three axes, including up and down movement. In this case as well, the monitoring unit 300 is configured to move in synchronization with the spindle system 100 so that the bottom surface of the tool T of the spindle system 100 can be photographed.

The monitoring unit 300, which photographs the bottom of the tool (T) of the spindle system 100, includes a monitoring housing 301 with a transparent upper surface, a camera 310 disposed inside the monitoring housing 301, a mirror 320, and It consists of a deflection prism (330).

An optical axis formed by a deflection prism 330 and a mirror 320 is formed between the camera 310 and the bottom of the tool T, so that an image of the bottom of the tool T can be acquired through the camera 310.

As described above, the bottom of the tool (T) and the monitoring unit 300 move in synchronization, so if the workpiece (W) does not exist between the spindle system 100 and the monitoring unit 300, the camera 310 An image of the bottom of the tool (T) is acquired, but when the workpiece (W) is placed between the spindle system 100 and the monitoring unit 300, the camera 310 captures the workpiece at a position corresponding to the tool (T). The bottom image of (W) or the bottom image of the workpiece (W) processed by the tool (T) can be obtained.

Therefore, using the image of the camera 310, it is possible to monitor the bottom state of the workpiece (W) before processing, the state of the bottom surface (cutting tip) of the tool (T), and the machining state of the machined workpiece (W). .

As shown in FIGS. 2, 3A, and 3B, the upper surface of the monitoring housing 301 of the monitoring unit 300 (between the upper surface and the deflection prism 330, depending on the embodiment) is illuminated by emitting light in an upward direction. (340) may be placed.

In addition, as shown in Figure 4, which is a diagram showing the configuration of a spindle system capable of monitoring the processing status and tool according to another embodiment of the present invention, the upper part of the transfer bed 200 is adjacent to the tool T side and the workpiece W is installed. A suction nozzle 410 is disposed to suck in scrap generated during processing. A pressure sensor is disposed in this suction nozzle 410 to sense the pressure inside the suction nozzle 410 and transmit it to the control unit.

At this time, the control unit determines that the tool (T) is damaged when the pressure inside the suction nozzle 410 transmitted from the pressure sensor is greater than the reference value.

In FIG. 5, which is a graph showing the pressure of the suction nozzle shown in FIG. 4, the pressure value inside the suction nozzle 410 sensed by the pressure sensor is shown with time as the X-axis.

In the graph, if the average pressure value (a specific pressure value depending on the embodiment) is set as the standard and a pressure value higher than the standard is sensed, the tool (T) is broken and a part of the damaged tool (T) is connected to the suction nozzle ( It can be determined that the internal pressure of the suction nozzle 410 is increased by flowing in through 410). However, since the pressure may appear temporarily high due to scrap generated during processing of the workpiece (W), if a pressure value higher than the standard is sensed, the image acquired from the camera 310 at the time the high pressure value is sensed It has the advantage of being able to reduce misjudgments in the control unit due to scrap by rechecking whether the tool is damaged.

In addition, by arranging the upper surface of the monitoring housing 301 to be inclined in a certain direction as shown in FIG. 4, the upper surface of the monitoring housing 301 can be prevented from being contaminated by scrap, etc., and the upper surface of the monitoring housing 301 can be prevented from being contaminated with scrap, etc. A discharge nozzle 420 capable of discharging compressed air to remove foreign substances may be disposed.

Although the embodiments have been described with limited drawings as described above, those skilled in the art can apply various technical modifications and variations based on the above. For example, the described techniques are performed in a different order than the described method, and/or components of the described system, structure, device, circuit, etc. are combined or combined in a different form than the described method, or other components are used. Alternatively, appropriate results may be achieved even if substituted or substituted by an equivalent.

100: spindle system 110: main shaft body
120: spindle 130: support
140: gripping part 142: leg
150: length detection unit 152: light emitting sensor
154: Light sensor
200: transfer bed
300: Monitoring unit 301: Monitoring housing
310: Camera 320: Mirror
330: deflection prism 340: lighting
410: Suction nozzle 420: Discharge nozzle
T: Tool F: Frame
W: Workpiece

Claims (6)

A spindle system including a spindle rotating inside a main shaft body and a support portion that prevents the spindle from leaving,
It includes; a gripper having a plurality of legs that retract or protrude from the spindle and grip a tool;
A length detection unit that detects the length of the tool is disposed at the bottom of the grip unit,
The length detection unit consists of a detection unit housing whose upper and lower parts are penetrated so that the tool is disposed therethrough, and a light emitting sensor and a light receiving sensor disposed on the inner surface of the detection unit housing to detect the length of the tool,
The spindle system is placed on a frame and moves up and down, and a monitoring unit for photographing the bottom of the tool attached to the spindle system is disposed at the bottom of the spindle system on the frame. There is blood between the spindle system and the monitoring unit. A transfer bed is disposed to support and transport the workpiece at both ends, and when the spindle system moves horizontally, the monitoring unit is synchronized to photograph the bottom of the tool of the spindle system and the machining point of the workpiece,
The monitoring unit includes a monitoring housing having a transparent upper surface, a camera, a mirror, and a deflection prism disposed inside the monitoring housing, and the optical axis of the camera for photographing the bottom of the tool is the bottom of the tool, the deflection prism, and the A spindle system capable of monitoring processing status and tools, characterized in that it is formed in mirror order.
According to paragraph 1,
The length detection unit is connected to the control unit,
A spindle system capable of monitoring processing status and tools, wherein the control unit determines the length of the tool using an increase or decrease in the amount of light detected by the light receiving sensor as a factor.
delete delete According to paragraph 2,
A light that irradiates light in an upward direction is disposed between the upper surface of the monitoring house of the monitoring unit or the upper surface and the deflection prism,
A suction nozzle is disposed on the upper part of the transfer bed adjacent to the tool to suction scrap generated during processing of the workpiece,
A pressure sensor is disposed on the suction nozzle to sense the pressure inside the suction nozzle and transmit it to the control unit,
A spindle system capable of monitoring processing status and tools, wherein the control unit determines that the tool is damaged when the pressure inside the suction nozzle transmitted from the pressure sensor is greater than a reference value.
According to clause 5,
When the control unit determines that the tool is damaged when the pressure inside the suction nozzle is greater than the standard value,
A spindle system capable of monitoring processing status and tools, wherein the control unit re-determines damage to the tool using an image acquired from the camera at a time when the pressure inside the suction nozzle is greater than a reference value.