JP5522628B2 - Surface treatment equipment - Google Patents

Description

  The present invention relates to a surface treatment apparatus that removes burrs generated during the processing of a molded product or the like, and specifically relates to an improvement in position adjustment of a rotating brush with respect to a treatment target.

  As a conventional surface treatment apparatus, for example, there is a deburring apparatus disclosed in Patent Document 1 below. FIG. 4 shows an outline thereof, and rotating brushes 910 and 920 are provided on the conveyor 900. The rotating brushes 910 and 920 are supported by the lifting mechanisms 912 and 922, respectively, and can be adjusted in height with respect to the conveyor 900. As described in detail in Patent Document 1, the lifting mechanisms 912 and 922 are configured by a lifting frame that supports the rotating brushes 910 and 920 and a motor that moves the lifting brushes up and down. .

  In such a deburring machine, the brush tip portions of the rotating brushes 910 and 920 are worn and shortened by performing the deburring operation. As a result, the contact of the rotary brushes 910 and 920 with the workpiece W to be processed decreases, eventually failing to hit at all, and good deburring cannot be performed. For this reason, position adjustment (height adjustment) of the rotating brushes 910 and 920 is performed using the elevating mechanisms 912 and 922.

  In order to adjust the position of the rotating brush, it is necessary to detect the degree of wear of the rotating brush. As a related art related to this, for example, there is a “processing apparatus using a tool” described in Patent Document 2 below. The purpose of this is to enable automation of a processing device using a tool that can be worn, and to perform high-precision processing that can obtain a desired dimension even when the tool is worn. The load on the shaft, tool, and table of the machining apparatus at the moment is detected by a strain gauge, and the contact position is set at the origin based on the detected load.

JP 2009-131945 A JP-A-11-77491

  However, the above-described prior art described in Patent Document 2 may be good in the case of a grindstone. However, as described in Patent Document 1, the rotating brush uses sandpaper. It is difficult to detect the distortion of the rotating shaft of the rotating brush. Even when the rotating brush hits the workpiece, the brush body is sandpaper, so that the distortion generated on the brush rotating shaft is negligible. Although a method of detecting the degree of wear of the rotating brush from the torque fluctuation of the brush rotating shaft is also conceivable, it is difficult for the same reason as the strain detection. Actually, even in the experiment conducted in connection with the present invention, it was not possible to detect the torque fluctuation at the time of contact between the rotating brush and the workpiece.

  The present invention focuses on the above points, and its purpose is to detect the degree of wear of the rotating brush well. Another object is to automatically and satisfactorily adjust the spacing between the rotating brush and the workpiece to be processed. Yet another object is to improve the efficiency of surface treatment operations such as deburring.

  In order to achieve the above object, the present invention provides a conveying means for conveying a processing object in a predetermined direction, at least one rotating brush arranged on the conveying means and performing a desired process in contact with the processing object, Interval adjusting means for adjusting the distance between the rotating brush and the object to be processed on the conveying means, flow velocity detecting means for detecting the flow velocity of the air flow generated when the rotating brush rotates, and detected by the flow velocity detecting means. Memory means for storing flow velocity-brush diameter data indicating the relationship between the flow velocity and the diameter of the rotating brush, and the flow velocity of the air flow detected by the flow velocity detection means with reference to the flow velocity-brush diameter data of the memory means And calculating means for calculating an adjustment amount of the interval adjusting means from the brush diameter and outputting the calculated amount to the interval adjusting means. To.

  In another aspect of the invention, a conveying means for conveying a processing object in a predetermined direction, at least one rotating brush arranged on the conveying means for performing a desired process in contact with the processing object, the rotating brush, Interval adjusting means for adjusting an interval with the processing object on the conveying means, flow velocity detecting means for detecting a flow velocity of an air flow generated when the rotating brush rotates, a flow velocity detected by the flow velocity detecting means, and the rotating brush The memory means for storing the flow velocity-brush diameter data indicating the relationship with the diameter of the air flow, the brush diameter corresponding to the flow velocity of the air flow detected by the flow velocity detecting means with reference to the flow velocity-brush diameter data of the memory means. And calculating an adjustment amount of the interval adjusting means from the brush diameter, and when the calculated adjustment amount exceeds a preset threshold value, the adjustment amount is supplied to the interval adjusting means. Force calculating means, characterized by comprising a.

  One of the main forms is characterized in that the calculation means determines whether or not the rotary brush has reached the use limit from the degree of wear of the rotary brush. One of the other forms is that when the rotating brush is constituted by a plurality of brush bodies, a plurality of the flow velocity detecting means are arranged near the center and the end in the rotation axis direction of the rotating brush. The calculating means compares the detection results of the plurality of flow velocity detecting means to determine the rotation time of the brush body. In still another embodiment, a thickness detection unit that detects the thickness of the processing target is provided, and the calculation unit calculates an adjustment amount of the interval adjustment unit using a detection result of the thickness detection unit. It is characterized by that. The above and other objects, features and advantages of the present invention will become apparent from the following detailed description and the accompanying drawings.

  According to the present invention, the degree of wear of the rotating brush can be detected from the flow velocity of the air flow generated by the rotation of the rotating brush, and the interval between the rotating brush and the object to be processed can be adjusted automatically and satisfactorily. The surface treatment work such as can be performed efficiently.

It is a figure which shows the main structures of the Example of this invention. It is a figure which shows an example of the flow velocity-brush diameter data used in the Example of this invention. It is a figure which shows the effect | action of the Example of this invention. It is a figure which shows the principal part of the deburring machine in which a rotary brush can adjust a position.

  Hereinafter, the best mode for carrying out the present invention will be described in detail based on examples.

  First, Embodiment 1 of the present invention will be described with reference to FIGS. FIG. 1 shows the overall configuration of this embodiment. In the figure, the rotary brushes 10 and 20 are supported by the elevating mechanisms 12 and 22 so as to be movable up and down, respectively, and the height of the rotary brushes 10 and 20 can be adjusted with respect to the conveyor 30 that conveys the workpiece W. The elevating mechanisms 12 and 22 may have any structure. For example, the elevating mechanisms 12 and 22 include an elevating frame disclosed in Patent Document 1 and a motor for moving the elevating mechanism up and down. In the illustrated example, the workpiece W to be processed moves on the conveyor 30 from the right side to the left side of the drawing as indicated by an arrow FA, and deburring is first performed by the rotating brush 10 and then by the rotating brush 20. It is. The rotation directions of the rotary brushes 10 and 20 are opposite as indicated by arrows FB and FC in the figure. That is, the rotating brush 10 is rotated in the direction in which the workpiece W is wound, and the rotating brush 20 is rotated in the opposite direction so that the burr can be well removed. Moreover, by setting it as such a rotation direction, the chip | tip and dust which arise by deburring come to gather in the abutting part of the rotating brushes 10 and 20, and dust collection can be performed efficiently.

  By the way, in the present embodiment, the velocimeter 100 is provided at the butt portion of the rotary brushes 10 and 20. The detection signal output side of the velocimeter 100 is connected to the calculation unit 210 of the calculation device 200. The arithmetic device 200 is constituted by a personal computer, a sequencer, or the like, and the brush adjustment amount is calculated by an arithmetic unit 210 such as a CPU. The calculation unit 210 is connected to the detection signal output side of a tachometer 220 that detects the rotation speed of the rotary brushes 10 and 20. In this embodiment, the rotary brushes 10 and 20 are driven at the same rotational speed.

  A data input unit 230 such as a keyboard is also connected to the arithmetic unit 210, so that necessary data input processing can be performed. Further, a display unit 240 is also connected to display the calculation result by the calculation unit 210.

  In addition, an external memory 250 such as a hard disk is connected to the calculation unit 210. The external memory 250 stores an adjustment amount calculation program 252 for calculating the brush adjustment amount, and flow velocity-brush diameter data 254 necessary for calculating the brush movement amount. The input data 256 input by the data input unit 230 is also stored in the external memory 250. The output side of the calculation result of the calculation unit 210 is connected to the lifting mechanisms 12 and 22 of the rotary brushes 10 and 20. The initial position P of the rotary brushes 10 and 20 in the elevating mechanisms 12 and 22 is also provided to the calculation unit 210. In this embodiment, it is assumed that the rotary brushes 10 and 20 are moved up and down synchronously and are in the same position. Further, an interface such as A / D conversion necessary for connection of each part and signal input / output is provided as appropriate, but is not shown.

  Among the above-mentioned parts, the velocity meter 100 is for detecting the velocity of the air flow generated by the rotation of the rotary brushes 10 and 20. For example, it is possible to obtain the flow velocity value from the energization amount by utilizing that the amount of current for keeping the temperature of the detection element to which the wind hits constant has a constant relationship with the flow velocity of the wind. As what is marketed, for example, the velocity meter 100 can be obtained by combining the velocity meter “Anemomaster” manufactured by Nippon Kanomax Co., Ltd. and the velocity converter “MODEL6332”.

  The calculation unit 210 calculates the diameter of the rotary brushes 10 and 20 by executing the adjustment amount calculation program 252 stored in the external memory 250, and outputs the adjustment amount of the rotary brushes 10 and 20 from the wear amount. It has a function. An example of the flow velocity-brush diameter data 254 used at this time is as shown in FIG. FIG. 2 is data showing the relationship between the diameter D of the rotating brushes 10 and 20 and the flow velocity V of the air flow measured by the velocimeter 100, and a graph can be obtained by connecting the measurement points. In addition, the graph can be expressed by a mathematical expression as necessary. FIGS. 4A to 4C show the cases where the rotational speeds of the rotary brushes 10 and 20 are 10 Hz (300 rpm), 20 Hz (600 rpm), and 30 Hz (900 rpm), respectively. These data are obtained by conducting an experiment in advance and stored in the external memory 250 as the flow velocity-brush diameter data 254. Which of FIGS. 2A to 2C is used is determined by the number of rotations of the rotating brushes 10 and 20 detected by the tachometer 220. In addition to FIGS. 2A to 2C, data may be collected and stored at a desired number of revolutions if necessary.

  By the way, the degree of wear of the rotating brushes 10 and 20 is not uniform, and differs between the central portion and the end portion. FIG. 3 (A) shows this state, and when the rotary brushes 10 and 20 are viewed in the direction of the rotation axis, much wear occurs in the vicinity of the center as shown by the dotted line, and wear at the ends is small. For this reason, the value of the brush diameter D obtained from the data of FIG. Therefore, one method is to arrange a plurality of velocimeters (100A to 100C in the illustrated example) in the direction of the rotation axis, and obtain an average value, median (median), etc. from the detection results of those velocities. The brush diameter D is obtained from the data in FIG. However, this method requires a plurality of velocimeters. Therefore, the degree of wear between the centers and the ends of the rotating brushes 10 and 20 is measured in advance, and for example, the flow velocity value of the central anemometer 100A is multiplied by a certain coefficient to correct the flow velocity value, and based on the corrected flow velocity value. There is a method for obtaining the brush diameter D from the data shown in FIG.

The data inputted by the data input unit 230, the brush limit diameter D _0, deburring increment Delta] h, work thickness WT, and the like adjustment threshold HA, brush rotation threshold [Delta] D _S. The brush limit diameter D ₀ is a diameter indicating the use limit of the rotary brushes 10 and 20. The deburring increment Δh indicates a brush position correction amount indicating how much deburring is performed. The workpiece thickness WT is the thickness of the workpiece W. The adjustment threshold HA is used to determine whether or not to perform the position adjustment operation, and is set to several millimeters, for example. Brush rotation threshold [Delta] D _S, when the rotary brush 10 and 20 as being composed of a plurality of brush body is to used to determine if performing the rotation.

  Next, the operation of this embodiment will be described. When adjusting the positions of the rotary brushes 10 and 20, the data input unit 230 inputs the data and drives the deburring machine to instruct execution of the position adjustment. Then, the rotary brushes 10 and 20 rotate, and the rotation speed n is output from the tachometer 220 to the calculation unit 210, and the initial position P of the rotary brushes 10 and 20 is output from the elevating mechanisms 12 and 22 to the calculation unit 210. The

  When an air flow is generated by the rotation of the rotary brushes 10 and 20, the flow velocity V of the air flow is detected by the anemometer 100. At this time, since the rotary brushes 10 and 20 are sandpaper type, the detected value of the flow velocity is not necessarily constant. Therefore, the calculation unit 210 calculates an arithmetic average or a moving average of the detection values V for a certain period. Next, the calculation unit 210 refers to the flow velocity-brush diameter data 254 of the external memory 250 shown in FIG. 2 and obtains the brush diameter D corresponding to the flow velocity V from the data of the corresponding brush rotation speed n.

  Next, the calculation unit 210 calculates the brush position adjustment amount ΔP from the obtained brush diameter D, the brush initial position P, and the workpiece thickness WT. FIG. 3B shows the state. In the figure, in order to make the tips of the rotary brushes 10 and 20 exactly the surface position of the workpiece W, ΔP = P−D / 2−WT. At this time, when the deburring increment Δh is input, the rotary brushes 10 and 20 are brought closer to the direction of the workpiece W by that value. That is, the adjustment amount (down amount in the illustrated example) of the rotary brushes 10 and 20 is ΔP + Δh. The obtained adjustment amount is also output and displayed on the display unit 240.

  By the way, if the brush position adjustment amount ΔP or ΔP + Δh as described above is output to the elevating mechanisms 12 and 22 as they are, the positions of the rotary brushes 10 and 20 are constantly changed. Accordingly, the calculation unit 210 refers to the adjustment threshold value HA in the input data 256 of the external memory 250, and when ΔP ≧ HA or (ΔP + Δh) ≧ HA with respect to the threshold value HA, the brush position adjustment amount. ΔP or ΔP + Δh is output to the elevating mechanisms 12 and 22. In this way, the position adjustment operation can be stabilized.

  As described above, according to this embodiment, the flow velocity of the air flow generated by the rotation of the rotary brushes 10 and 20 is detected by the velocimeter 100, the diameter of the rotary brushes 10 and 20 is obtained from the value, and the rotary brush 10 Therefore, the degree of wear of the rotary brushes 10 and 20 can be detected well, and the rotary brushes 10 and 20 and the workpiece W can be automatically maintained at an appropriate interval. . Thereby, automation (in-line) of a deburring operation can be achieved.

Next, a second embodiment of the present invention will be described. In this embodiment, the calculation unit 210 refers to the value of the brush limit diameter D _{0 in} the input data 256 of the external memory 250. That is, a brush diameter D detected by the operation of Example 1, comparing the brush limit diameter D _0, when it becomes D ≦ D _0, the rotary brush 10 and 20 it is time for replacement exhausted It is judged that it is, and that is output to the display part 240 and displayed. As a result, the user of the deburring machine can use the rotating brushes 10 and 20 to the limit, and can perform brush replacement at an appropriate time to prevent the deburring quality from being deteriorated.

Next, Embodiment 3 of the present invention will be described. This embodiment is a suitable example when the rotating brush 10 is constituted by two brush bodies 10A and 10B, for example, as shown by a one-dot chain line in FIG. In the present embodiment, as shown in FIG. 3A, a plurality of velocimeters 100A to 100C provided near the center and near the end of the rotating brush 10 in the rotation axis direction are used. Then, the arithmetic unit 210, the value of the brush rotation threshold [Delta] D _S in the input data 256 in the external memory 250 is referred to. That is, the brush diameters DA to DC are obtained from the relationship of FIG. 2 for each of the detection results of the flow velocity V by the velocimeters 100A to 100C. Then, a brush diameter DA obtained by the central side of the current meter 100A, to no brush diameter DB obtained by the end side of the current meter 100B to 100C compared with the DC, difference between the two, the brush rotation threshold [Delta] D _S On the other hand, when DA−DB ≧ ΔD _S (or DA−DC ≧ ΔD _S ), it is determined that it is time to rotate the brush bodies 10A and 10B, and this is indicated by the display unit 240. Output to and display. Thereby, the user of the deburring machine can appropriately perform the brush body rotation. The rotation of the brush body is the same as the rotation of the tire of an automobile, and is disclosed in, for example, paragraph numbers 0052 to 0054 and FIG. 13 of the specification of Japanese Patent Application Laid-Open No. 2008-207316.

  Next, Embodiment 4 of the present invention will be described with reference to FIG. As shown in the figure, according to the present embodiment, a workpiece thickness detection sensor 300 is provided so as to sandwich the workpiece W at a position substantially perpendicular to the workpiece feeding direction of the conveyor 30, and its output detection signal The SWT is supplied to the calculation unit 210 of the calculation device 200. The workpiece thickness detection sensor 300 includes a light emitting element array 300A and a light receiving element array 300B. A part of the light beam output from the light emitting element array 300A is blocked by the work W, and the light receiving element array 300B. Is incident on. Since the amount of light received by the light receiving element array 300B varies depending on the thickness WT of the work W, the work thickness WT can be known from the output signal SWT of the light receiving element array 300B.

  In the above-described embodiment, the workpiece thickness WT is input in advance by the data input unit 230. However, in the present embodiment, the calculation unit 210 receives the workpiece thickness from the workpiece thickness detection signal SWT output from the workpiece thickness detection sensor 300. Therefore, even when the thickness WT of the workpiece W varies, the position adjustment of the rotary brushes 10 and 20 can be automatically performed satisfactorily.

In addition, this invention is not limited to the Example mentioned above, A various change can be added in the range which does not deviate from the summary of this invention. For example, the following are also included.
(1) In the above embodiment, the case where the conveyor side is fixed and the rotating brush side is configured to be movable has been described as an example, but conversely, the rotating brush side is fixed and the conveyor side is configured to be movable. In the case where the two are configured to be movable, the same applies. That is, it is only necessary to adjust the interval between the rotating brush and the workpiece.
(2) Although the case where there are two rotating brushes is shown in the above embodiment, the present invention can be similarly applied to the case where there are one and three or more rotating brushes. When there are a plurality of rotating brushes, the position may be adjusted by measuring the degree of wear for each rotating brush. The same applies when there are a plurality of conveyors.
(3) As a rotating brush, a case where sandpaper is used is a suitable example, but it can be applied to various known brushes.
(4) The configuration of the control device shown in the above embodiment is merely an example, and various known forms are conceivable. For example, although a personal computer is used in the above embodiment, a PLC (program control relay) or a sequencer may be used. Further, the brush limit diameter D ₀ which is data related to the rotation _brush, and displays a barcode brush rotation threshold [Delta] D _S, it may be incorporated into the external memory 250 by reading a bar code reader. In the above-described embodiment, the thickness WT of the workpiece W is detected using an optical sensor, but various known detection methods may also be applied to this.
(5) The anemometer may be disposed at any position as long as it is in the vicinity of the rotating brushes 10 and 20 and can detect the flow velocity of the air flow generated by the rotation.
(6) In the above embodiment, the present invention is applied to a deburring machine, but this is also an example, and the present invention is also applied to the surface finishing processing of a thin plate and the polishing processing of a wood surface. Is possible. In addition, it can be applied to stainless steel hairline processing.
(7) You may combine the said Example as needed.

  According to the present invention, since the degree of wear of the rotating brush is detected from the flow velocity of the air flow generated by the rotation of the rotating brush, the interval between the rotating brush and the object to be processed can be adjusted automatically and satisfactorily. Application to deburring machines, surface polishing machines, etc. is possible.

10, 20: Rotating brushes 10A, 10B: Brush bodies 12, 22: Lifting mechanism 30: Conveyor 100: Current meter 100A-100C: Current meter 200: Arithmetic device 210: Operation unit 220: Revolution meter 230: Data input unit 240: Display unit 250: External memory 252: Adjustment amount calculation program 254: Flow velocity-brush diameter data 256: Input data 300: Work thickness detection sensor 300A: Light emitting element array 300B: Light receiving element array 900: Conveyor 910, 920: Rotating brush 912 922: Lifting mechanism D: Brush diameter D ₀ : Brush limit diameter HA: Adjustment threshold n: Brush rotation speed n: Number of rotations P: Brush initial position SWT: Output detection signal V: Flow velocity W: Workpiece WT: Workpiece thickness ΔD _S : Brush rotation threshold value Δh: Deburring increment amount ΔP: Brush position adjustment amount

Claims (5)

Transport means for transporting the processing object in a predetermined direction;
At least one rotating brush which is disposed on the conveying means and performs a desired process in contact with the processing object;
An interval adjusting means for adjusting an interval between the rotating brush and an object to be processed on the conveying means;
A flow velocity detecting means for detecting a flow velocity of an air flow generated when the rotating brush rotates;
Memory means for storing flow velocity-brush diameter data indicating the relationship between the flow velocity detected by the flow velocity detection means and the diameter of the rotating brush;
By referring to the flow velocity-brush diameter data of the memory means, a brush diameter corresponding to the air flow velocity detected by the flow velocity detecting means is obtained, and the adjustment amount of the interval adjusting means is calculated from the brush diameter. Calculating means for outputting to the interval adjusting means,
A surface treatment apparatus comprising: Transport means for transporting the processing object in a predetermined direction;
At least one rotating brush which is disposed on the conveying means and performs a desired process in contact with the processing object;
An interval adjusting means for adjusting an interval between the rotating brush and an object to be processed on the conveying means;
A flow velocity detecting means for detecting a flow velocity of an air flow generated when the rotating brush rotates;
Memory means for storing flow velocity-brush diameter data indicating the relationship between the flow velocity detected by the flow velocity detection means and the diameter of the rotating brush;
With reference to the flow velocity-brush diameter data of the memory means, a brush diameter corresponding to the air flow velocity detected by the flow velocity detection means is obtained, and an adjustment amount of the interval adjustment means is calculated from the brush diameter, Calculating means for outputting the adjustment amount to the interval adjusting means when the calculated adjustment amount exceeds a preset threshold;
A surface treatment apparatus comprising:   The surface processing apparatus according to claim 1, wherein the calculation unit determines whether or not the rotating brush has reached a use limit based on a degree of wear of the rotating brush. When the rotating brush is composed of a plurality of brush bodies,
A plurality of the flow velocity detection means are arranged near the center and the end in the rotation axis direction of the rotary brush,
The surface processing apparatus according to any one of claims 1 to 3, wherein the calculation means compares the detection results of the plurality of flow velocity detection means to determine the timing of rotation of the brush body. . A thickness detecting means for detecting the thickness of the processing target is provided,
The surface treatment apparatus according to claim 1, wherein the calculation unit calculates an adjustment amount of the interval adjustment unit using a detection result of the thickness detection unit.

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