JP3727314B2 - Surface processing equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention includes a surface processing region forming unit that determines a target region to be surface processed on a workpiece, and a traveling unit that is movable along the surface of the workpiece in response to a command from the surface processing region forming unit. And a traveling unit that includes a lifting unit that is movable up and down with respect to the workpiece and a processing tool that processes the surface of the workpiece.
[0002]
[Prior art]
Conventionally, as this type of surface processing apparatus, for example, an engraving apparatus, a foil transfer apparatus, and the like have been known.
[0003]
Among these, as an example of the foil transfer device, there is an apparatus that creates an image of a character or the like to be imprinted on a computer image and supplies an image signal of the created image to a processing tool that performs heat engraving. This processing tool is provided in a traveling unit that moves in the X-Y direction, and stamps the created image in response to the supplied image signal. During processing, the foil to be stamped is superimposed on the material to be stamped (workpiece), and the heated foil is pressed by the heated processing tool to transfer the pattern corresponding to the image signal onto the workpiece. (See Patent Document 1).
[0004]
As shown in FIG. 9, this foil transfer apparatus X heats the workpiece 81 at a predetermined pressure and temperature, and an image forming unit B that creates an image to be engraved and outputs an image signal. It consists of a heat stamping part A or the like for marking. The running section 110 of the heating marking section A is provided with a marking head (processing tool) 11 that can be heated at a predetermined temperature and stamped at a predetermined pressure (marking pressure).
[0005]
When transferring the foil, the foil 81 is overlaid on the workpiece 82 and placed on the table 83 provided in the heat stamped portion A in this state.
[0006]
As shown in FIG. 10, since the processing tool 11 has a pen shape with a sharp tip, the fine shape of the image can be faithfully reproduced, and is supported by an elastic body such as coil springs 84 and 85. Therefore, it is configured so as to always have a constant marking pressure. The stamping pressure can be set, for example, by changing the strength or stress of the coil springs 84 and 85 that support the processing tool 11.
[0007]
The foil transfer device X configured as described above is balanced by the weight of the processing tool 11 and the elastic support force of the coil springs 84 and 85, and is used as the material of the workpiece 82 with respect to the workpiece 82. Appropriate pressure can be applied. As a result, the same pattern as the image formed in the image forming portion B was accurately stamped on the workpiece 82 by the processing tool 11.
[0008]
Further, it has been known to provide a surface copying member having a workpiece contact surface capable of adjusting the protrusion amount of the processing tool and capable of contacting the workpiece. By providing the surface copying member, even if the surface of the workpiece has irregularities, the surface copying member moves up and down following the irregularities, so that the marking depth of the processing tool 11 is stabilized. It was possible.
[0009]
As another surface processing device, the surface of a three-dimensional object (workpiece) to be processed is measured in advance with a contact or non-contact sensor, and then CAD / CAM based on the measurement data. Some have created shape data, and applied characters, patterns, etc. in contact or non-contact with the surface or inner surface of the workpiece by computer control (for example, see Patent Document 2).
[0010]
[Patent Document 1]
JP-A-11-216998 (paragraphs 0007 to 0012, FIGS. 1 and 2)
[Patent Document 2]
JP 2001-265414 (paragraphs 0014 and 0036)
[0011]
[Problems to be solved by the invention]
According to the above-described foil transfer device of Patent Document 1, a balance is maintained by the weight of the processing tool including the marking head and the elastic support force of the coil spring, and a constant marking pressure is generated in the marking head. It has become.
[0012]
Preferably, the coil spring uses a spring having an appropriate strength for reliably pressing the foil and the workpiece and transferring the foil to the workpiece reliably. It is desirable that the pressure can be changed to an optimum pressure according to the material of the workpiece.
However, if a coil spring having a strong stress is used, the workpiece may be damaged because the stamping pressure is too high.
[0013]
Further, in the case where the surface copying member is provided, the processing tool and the surface copying member are integrally configured, and the force for pressing the processing tool against the workpiece and the surface copying member are the workpiece. The force for pressing was exerted by the same coil spring. In this case, it is necessary to generate a strong pressing force to some extent in order to reliably mark the workpiece. However, as described above, since the pressing force for machining and the pressing force for copying use the same spring, a strong pressing force is always applied to the workpiece. It was. As a result, the workpiece may be tilted during the engraving process. During the engraving process, when the workpiece is tilted and the contact between the workpiece and the surface copying member changes, the engraving depth is not constant when the surface processing is an engraving process, and the workpiece There was a problem that processing accuracy was lowered.
[0014]
Prior to engraving or engraving, the surface processing apparatus described in Patent Document 2 senses the entire processing surface of a workpiece with a sensor, measures the unevenness of the processing surface, and engraving the head based on the measurement data. Alternatively, the height of the marking head relative to the workpiece is determined.
However, since it takes time to sense the entire processing surface and obtain measurement data, there is a problem that the processing efficiency of the workpiece is poor, and the workpiece moves after the processing starts. Sensing measurement data was wasted.
[0015]
Accordingly, an object of the present invention is to provide a surface processing apparatus excellent in processing accuracy and processing efficiency of a workpiece.
[0016]
[Means for Solving the Problems]
    [Configuration 1]
  The characteristic configuration of the present invention for achieving this object is as follows:A traveling unit movable along the surface of the workpiece, and a lifting unit held by the traveling unit so as to be movable up and down with respect to the workpiece,
In the lifting part,A processing tool for surface processing the workpiece;A surface copying member that holds the processing tool, and an elastic member that urges the surface copying member toward the workpiece;
  In addition,A surface processing region forming unit for determining a target region to be surface processed on the workpiece;A lifting control unit for controlling the lifting movement of the lifting unit.A surface processing apparatus, comprising:Of the surface copying memberOn the tip side, the surface of the workpiece andContact slidingPossible contact memberThe surface copying memberIt can be moved up and down with respect toA sensor capable of detecting the height position of the contact member with respect to the surface copying member is provided across the surface copying member and the contact member,
When processing the predetermined block, when the sensor detects that the contact member has moved downward, the lift control unit controls the lift to lower the downward movement so as to eliminate the downward movement.The operational effects are as follows.
[0017]
    [Operation effect 1]
  That meansThe sensor includes a contact member that can move up and down with respect to the surface copying member, a lift control unit that controls the lift movement of the lift unit, and a sensor that can detect the contact member. The elevator controller moves the elevator according to the movement.Can be controlled.
[0018]
For example, when the contact member does not move up and down, the sensor recognizes that the contact member has the same height. When the contact member moves up and down, the sensor recognizes that the contact member has a different height. At this time, it is determined that the contact member has been lowered or pushed.
[0019]
When the sensor recognizes that the contact member has the same height, the lift does not move up and down, and when the sensor recognizes that the contact member has a different height ( That is, when the abutting member is deviated from the threshold position, for example, when the abutting member is lowered, the elevating unit is controlled to move downward until the sensor detects the abutting member.
[0020]
Thereby, when the contact member descends, the protruding length of the processing tool protruding from the contact member can be returned to the previous state. In this way, the surface processing depth is immediately corrected so as to be the same depth as the surface processing depth before the contact member moves downward.
[0021]
With this configuration, even when the surface of the workpiece has irregularities and the surface state is not uniform, the surface processing depth is substantially uniform, and the processing accuracy of the workpiece is improved. In addition, even if the workpiece is slightly inclined during processing, the protruding length of the processing tool protruding from the contact member can be made constant, and the surface processing depth becomes substantially uniform. Machining accuracy is improved.
[0022]
Thus, in the surface processing apparatus of this configuration, since the processing depth can be corrected while performing the surface processing, it is not necessary to obtain measurement data by sensing the entire processing surface for a long time before the surface processing. Therefore, the processing efficiency of the workpiece is improved.
[0023]
Further, in this configuration, since a strong coil spring is not used for the contact member that senses the unevenness of the surface of the workpiece, the workpiece moves during the processing, or the workpiece There is almost no risk of damage.
[0024]
[Configuration 2]
The characteristic configuration of the present invention for achieving this object is the above-described configuration 1,
The contact member surrounds the processing tool and suction means for sucking a surface processing residue is communicated with the contact member. The operation and effect are as follows.
[0025]
[Operation effect 2]
That is, when the contact member surrounds the processing tool, the surface processing residue generated by surface processing of the workpiece by the processing tool remains inside the contact member that surrounds the processing tool. Scattering can be prevented.
[0026]
Furthermore, when the suction means for sucking the surface processing residue is communicated with the contact member, the suction means can suck the surface processing residue remaining inside the contact member. Accordingly, since the surface processing residue generated by the surface processing can be immediately removed by the suction means, it is possible to prevent the surface processing from being disturbed by the contact member climbing on the surface processing residue. it can. Thereby, the quality of the workpiece is further improved. Then, if the surface processing residue is removed immediately after the surface processing by the suction means, the cleaning effort after the surface processing can be reduced.
[0027]
  In order to achieve this object, the characteristic configuration of the present invention is the above configuration 1 or 2, wherein the contact member has a threshold position serving as a reference for on-off control of the sensor,
  When the target area to be surface processed on the workpiece is divided into a plurality of blocks,After processing a given block,The elevation controller isRaise the lifting partByThe contact member is lowered from a threshold position to separate the contact member and the processing tool from the workpiece;
  After moving the traveling unit on another block different from the predetermined block,The elevation controller isLowering the elevating part,AndWhen the contact member is pushed to the threshold position, the lowering of the elevating part is stopped. The operation and effect are as follows.
[0028]
[Operation effect 3]
When the contact member has a threshold position that serves as a reference for on-off control of the sensor, for example, the sensor is turned off when the contact member deviates from a preset threshold position. Thus, although it is simple structure, the protrusion state of the said contact member, ie, the up-and-down position of the said raising / lowering part, can be recognized correctly.
[0029]
  And when the surface processing area to be processed is divided into a plurality of blocks, after processing the predetermined block,The lifting control unitRaise the lifting partByThe contact member is lowered from a threshold position to separate the contact member and the processing tool from the workpiece, and in another block different from the predetermined block,The elevating control unit lowers the elevating unit; andWhen the abutting member is pushed down to the threshold position, the lowering of the elevating part is stopped, and the surface of the workpiece is formed by the predetermined block and another block different from the predetermined block. The height of the elevating part with respect to can be made substantially equal. Thus, since the height of the elevating part is frequently corrected for each block, the height of the surface processing for each block slightly changes, for example, the workpiece is inclined during the surface processing. Even in this case, the surface processing depth is almost uniform in all blocks, and the processing accuracy is improved.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings. In the drawings, the parts denoted by the same reference numerals as in the conventional example indicate the same or corresponding parts.
[0031]
The surface processing apparatus of the present invention is preferably used, for example, when engraving or engraving the surface of a workpiece such as a wood block. In this case, it becomes feasible by exchanging various processing tools described later.
[0032]
As described above, the wood block is suitable as the workpiece, and can be processed into a scale, a name plate, and the like, for example.
[0033]
FIG. 1 shows an embodiment of the surface processing apparatus of the present invention. The surface processing apparatus X mainly performs surface processing on the workpiece 82 in accordance with a surface processing region forming unit B that determines a target region to be surface processed on the workpiece 82 and a command from the surface processing region forming unit B. And processing portion A to be configured. Hereinafter, each configuration will be described in detail.
[0034]
(1) Surface processed region forming part
In order to determine a target region to be surface-processed on the workpiece 82, the surface-processed region forming unit B forms an image such as a character or a figure to be surface processed by a terminal 101 such as a personal computer. Images such as characters and figures to be processed on the workpiece 82 are created using a system such as CAD / CAM.
An image signal corresponding to the image formed by the surface processing region forming part B is transferred to the processing part A described later by the cable 102 or the like.
[0035]
(2) Processing part
The processing unit A performs surface processing on the workpiece 82 in accordance with a command from the surface processing region forming unit B. The processing unit A includes, for example, a traveling unit 110 that can move along the surface of the workpiece 82 according to a command from the surface processing region forming unit B, a lifting unit 120 provided in the traveling unit 110, and the traveling. A driving mechanism 88 for driving the section 110, a table 83 for placing a workpiece 80 such as the workpiece 82, an operation unit 89 for controlling the driving mechanism 88, and the like.
[0036]
As shown in FIG. 1, the traveling unit 110 is moved in the horizontal direction (A ′ direction) along the traveling groove portion 91 provided on the side surface of the drive mechanism 88, or the direction in which the traveling portion 110 moves out of the traveling groove portion 91 It is attached to the drive mechanism 88 so as to be movable in the B ′ direction).
[0037]
A lift 120 is attached to the traveling unit 110 and can be moved to any position on the surface of the above-described figurine 80 placed on the table 83.
[0038]
The table 83 is attached to the drive mechanism 88 so that the height can be finely adjusted.
[0039]
The traveling unit 110 moves in response to a command from the surface processing region forming unit B. Thereby, the traveling unit 110 can accurately process the same pattern as the image determined in the surface processing region forming unit B on the surface of the workpiece 82.
[0040]
The operation unit 89 controls the operation of the traveling unit 110 and is used, for example, at the time of start, calibration described later, and the like.
[0041]
As shown in FIGS. 2 to 4, the traveling unit 110 includes an elevating unit 120 that can move up and down vertically with respect to the workpiece 82, a processing tool 13 that processes the surface of the workpiece 82, and the like. are doing. Below, the said processing tool 13 and the raising / lowering part 120 are explained in full detail in order.
[0042]
(2-1) Processing tool
The processing tool 13 processes the surface of the workpiece 82. As described above, the surface processing corresponds to engraving processing, engraving processing, and the like, and known tools for performing these processing can be applied.
[0043]
For example, an instrument for engraving the workpiece 82 is preferably provided with a processing head portion 13a such as a cutter shape, a drill shape, or a needle shape. It is preferable to have a processing head portion 13a such as a ball member.
[0044]
The said processing tool 13 adjusts height with respect to the said raising / lowering part 120 before surface processing. Height adjustment is performed by changing the vertical position with respect to the cylindrical member 14 provided in the said raising / lowering part 120, and the latching | locking part 13b is used in that case.
[0045]
The cylindrical member 14 is supported via a bearing member 18 with respect to a later-described spindle 31 of the elevating unit 120.
[0046]
A pulley 16 that is rotatable by a belt 17 that transmits the rotation of a motor (not shown) is attached to the cylindrical member 14. Thereby, the said processing tool 13 rotates by motor drive, and processes the surface of the said to-be-processed object 82. FIG.
[0047]
(2-2) Lifting unit
The elevating unit 120 is attached to the traveling unit 110 so as to be vertically movable with respect to the workpiece 82. The lifting / lowering unit 120 is controlled to be lifted / lowered by a lifting / lowering control unit 111 provided in the traveling unit 110. Therefore, the elevation control unit 111 is connected to the sensor 140 and the cable 103 so as to be able to receive a signal from the sensor 140 described later (see FIG. 5).
The elevating control unit 111 controls the elevating unit 120 to elevate, for example, with a gear.
[0048]
As shown in FIG. 4, the elevating part 120 is provided with a processing tool accommodating member 15, a spindle 31, a pressure adjusting means 92, a surface copying member 61, and the like. A contact member 130 and a sensor 140, which are characteristic configurations, are attached. Each member will be described in detail below (see FIGS. 2 to 4).
[0049]
(A) Processing tool housing member and spindle
The processing tool accommodating member 15 and the spindle 31 are hollow, and the cylindrical member 14 and the processing tool 13 are accommodated therein. A locking portion 15a is provided on the outer periphery of the upper end of the processing tool housing member 15 (see FIG. 4), and this locking portion 15a is engaged with the locking portion 31a provided on the inner periphery of the spindle 31. It is configured to be compatible. The lower end of the processing tool housing member 15 is configured to be connectable to the surface copying member 61.
[0050]
The cylindrical member 14 is rotatably supported through the bearing member 18 inside the processing tool housing member 15 and the spindle 31 (see FIG. 4).
[0051]
(B) Pressure adjusting means
When the surface copying member 61 comes into contact with the workpiece 82 that is a placement object, the lifting / lowering unit 120 is configured to reduce pressure that the surface copying member 61 presses the workpiece 82. 92 is provided.
[0052]
The pressure adjusting means 92 is configured, for example, by screwing and attaching a screwing member 51 whose position can be adjusted along the raising / lowering direction of the raising / lowering part 120 to the spindle 31 in a screw groove 54. Therefore, by rotating the screwing member 51 with respect to the spindle 31 and changing the position in the axial direction thereof, the elastic member 41 acting over the screwing member 51 and the processing tool housing member 15 is pushed. Adjust the pressure. The elastic member 41 is formed by, for example, a coil spring made of a wire having a diameter of 1.6 mm.
[0053]
The lower end of the elastic member 41 is locked by, for example, a washer 21 mounted on the outer periphery of the processing tool storage member 15, and the upper end of the elastic member 41 stores a part of the elastic member 41. It is locked by the locking portion 53 of the pressurizing means accommodating portion 52.
[0054]
The pressing force of the elastic member 41 can be changed according to the material of the workpiece 82 and the like. That is, by adjusting the position of the screwing member 51 along the raising / lowering direction of the elevating part 120, the width of the elastic member 41 can be changed from the upper end to the lower end, thereby adjusting the pressing force of the elastic member 41. be able to.
[0055]
With this configuration, when the surface copying member 61 comes into contact with the workpiece 82, the elastic member 41 contracts and the processing tool housing member 15 is pushed upward, so that the surface copying member 61 is The pressure which presses the workpiece 82 can be relieved.
[0056]
(C) Surface copying member
A surface copying member 61 having an abutting member 130 and a sensor 140 is provided below the elevating unit 120.
[0057]
In the surface copying member 61, for example, as shown in FIG. 4, the copying main body 64 is screwed and attached to the processing tool housing member 15 with a screw groove 62. Further, the skirt portion 65 is screwed to the copying main body 64 at, for example, a screw groove 63.
[0058]
In addition, the lower end of the skirt portion 65 is provided with a protruding hole 66 through which the tip end portion of the processing head portion 13a and the contact member 130 protrude. Hereinafter, the contact member 130 and the sensor 140 will be described.
[0059]
(Contact member)
The abutting member 130 is preferably provided inside the skirt portion 65 so as to be in contact with the surface of the workpiece 82 so as to be the tip of the elevating / lowering portion 120. The contact member 130 is provided so as to be movable up and down with respect to the elevating part 120.
[0060]
Specifically, as shown in FIG. 5, a locking portion 131 is provided on the outer periphery of the abutting member 130, and the locking portion 131 can be locked on the inner periphery of the skirt portion 65. A stop 67 is provided. That is, the contact member 130 is movable up and down with respect to the workpiece 82 with the position where the locking portion 67 and the locking portion 131 are locked as the lowest position.
[0061]
At the upper end of the contact member 130, an elastic member 133 is provided that acts over the contact member 130 and the copying main body 64. The elastic member 133 is formed by, for example, a coil spring made of a wire having a diameter of 0.3 to 0.35 mm. The coil spring has a pressing force sufficient to bring the contact member 130 into contact with the workpiece 82, and further pressurizes the contact member 130 to such an extent that the workpiece 82 is not moved. In this case, since a coil spring having a strong stress is not used, there is almost no risk of damaging the workpiece.
[0062]
Further, a sensor detection unit 132 that can be detected by the sensor 140 is provided on a side surface of the contact member 130. The sensor detection unit 132 is configured such that the sensor 140 detects the sensor detection unit 132 at a fixed position when the contact member 130 moves up and down. The sensor detection unit 132 is preferably in the form of a rod or a plate, for example.
[0063]
[Sensor]
  The sensor 140 is configured to detect the contact member 130.
  FIG. 5 illustrates a case where one end of the sensor 140 is provided inside the skirt portion 65 so as to penetrate therethrough.
[0064]
FIG. 6 shows the configuration of the sensor 140.
The sensor 140 includes a sensing unit 141 that detects a sensor detection unit 132 provided on the contact member 130. For example, it can be formed in a U-shape, but is not limited thereto.
The sensing unit 141 is provided with a light-emitting element 142 and a light-receiving element 143 facing each other, and configured to detect the sensor detection unit 132 that has passed through a detection space surrounded by a U-shape without contact. is there. In the sensing unit 141, the sensor detection unit 142 determines whether the light emitted from the light emitting element 142 to the light receiving element 143 is blocked by the sensor detection unit 132 when the contact member 130 is changed in the vertical position. The presence or absence of 132 is detected.
[0065]
With this configuration, the sensor 140 can detect the vertical movement of the contact member 130.
[0066]
The elevating unit 120 is controlled to elevate as follows, for example.
When the sensing unit 141 detects the sensor detection unit 132, the sensor 140 recognizes that the contact member 130 has the same height. That is, since it can be determined that the pressing state of the contact member 130 is appropriate, the elevating unit 120 does not perform elevating control. When the sensing unit 141 does not detect the sensor detection unit 132 (for example, when the distance between the lifting unit 120 and the workpiece 82 is increased), the contact member 130 is moved to the lifting unit 120. It is determined that the state has protruded excessively, and a signal is transmitted to the elevation control unit 111, and the elevation unit 120 is controlled to descend until the sensing unit 141 detects the sensor detection unit 132.
[0067]
Here, when the workpiece 82 is uneven, when the contact member 130 passes the uneven portion of the workpiece 82, the contact member 130 (sensor detection unit 132) moves up and down. At this time, the protruding length of the processing head portion 13a protruding from the contact member 130 changes, but the heights of the traveling portion 110 and the elevating portion 120 do not change. The processing depth at which the surface of the object 82 is processed changes by the unevenness.
[0068]
However, as in the configuration of the present application, when the sensor detection unit 132 moves up and down, in particular, when the elevation unit 120 is controlled to return to the state before the sensor detection unit 132 projects and moves downward, The protrusion length of the processing head portion 13a protruding from the contact member 130 can be returned to the state before the sensor detection portion 132 moves downward. Therefore, the surface processing depth can be immediately corrected so as to be the same depth as the surface processing depth before the vertical position of the sensor detection unit 132 is changed. Therefore, even for the workpiece 82 whose surface state is not uniform, it is possible to perform a processing process in which the surface processing depth is constant in a place with unevenness.
[0069]
Further, even when the workpiece 82 is slightly tilted during processing, the protruding length of the processing head portion 13a protruding from the contact member 130 can be made constant. Surface processing depth is almost uniform, and processing accuracy is improved.
Furthermore, since the processing depth can be corrected while performing the surface processing, it is not necessary to sense the entire processing surface and obtain measurement data before the surface processing. Therefore, the processing efficiency of the workpiece 82 is improved.
[0070]
As shown in FIGS. 5 to 6, the contact member 130 can surround the processing tool 13. For example, a columnar shape or a form similar to this can be applied. The suction means 150 for sucking the surface processing residue can be configured to communicate with the contact member 130.
[0071]
As a specific example of such a configuration, a plurality of holes 134 are provided on the side surface of the contact member 130, and a suction means 150 for sucking surface processing residue is communicated with at least one of the holes 134. The case where it comprises is illustrated.
[0072]
The suction means 150 communicates with the hole portion 134 by penetrating the side surface of the skirt portion 65 and communicating with the inside of the skirt portion 65.
[0073]
With this configuration, the surface processing residue generated by processing the surface of the workpiece 82 by the processing head unit 13a stays in the contact member 130 surrounding the processing tool 13 and is scattered around. Can be prevented. Further, since the suction means 150 communicates with at least one of the plurality of (two in this embodiment) holes 134, the suction means 150 sucks the surface processing residue remaining inside the contact member 130. can do. When the suction means 150 is in operation, air flows into the abutting member 130 from the holes 134 other than the hole 134 with which the suction means 150 communicates.
[0074]
Therefore, since the surface processing residue generated by the surface processing can be immediately removed by the suction means 150, the surface processing residue can be prevented from becoming an obstacle to the surface processing. Thereby, the quality of the workpiece 82 is further improved.
[0075]
【Example】
An embodiment of the surface processing apparatus X of the present invention described above will be described with reference to the drawings.
In this embodiment, a case where a character is engraved on the workpiece 82 as a wood block is illustrated.
[0076]
First, in the terminal 101 of the surface processing region forming part B, an image of characters or the like to be engraved is created. Then, an image signal corresponding to the image formed by the surface processing region forming unit B is transferred to the processing unit A via the cable 102.
[0077]
Next, the position which is the workpiece 82 is placed on the table 83 of the processing part A. After fixing the position rod 82, the height of the table 83 is finely adjusted, and the processing tool 13 is set at the engraving start position by the operation unit 89.
[0078]
Prior to the start of engraving, the processing tool 13 is set by determining the engraving depth on the surface of the ridge 82. This setting is performed as follows, for example. At this time, the sensor 140 is offline.
[0079]
As shown in FIG. 7A, the spacer 86 having the same thickness as the processing depth is sandwiched between the contact member 130 and the position rod 82. Since the processing tool 13 is not fixed to the cylindrical member 14, the processing tool 13 can move up and down. In this state, the tip 12 of the processing head portion 13a is placed on the surface of the position rod 82 (processing depth calibration). Process). At this time, the tip of the processing head portion 13a projects below the lower end of the contact member 130 by the thickness of the spacer 86. That is, the protrusion of the processing head portion 13a is the processing depth.
[0080]
In this state, the processing tool 13 is fixed to the cylindrical member 14 by the locking portion 13b (fixing step).
[0081]
Then, the spacer 86 is removed and the sensor 140 is turned on. As shown in FIG. 7B, the elevating unit is moved until the contact member 130 is detected by the sensing unit 141 of the sensor 140. 120 is lowered (height adjustment step). At this time, the protrusion of the machining head portion 13a is in a state of being recessed into the position rod 82.
[0082]
Then, a start button provided on the operation unit 89 is pressed to start engraving.
[0083]
During the engraving process of the plate 82, it is considered that the surface of the wood block has irregularities. At this time, in the surface processing apparatus X of the present invention, the contact member 130 (sensor detection unit 132) passes through the unevenness and protrudes from the contact member 130 as the contact member 130 moves up and down. When the projection length of the machining head portion 13a is changed (particularly, the elevating portion 120 and the workpiece 82 are separated from each other, and the contact member 130 is excessively projected from the elevating portion 120). ), The elevating unit 120 can be controlled to be lowered so that the protruding length of the processing head unit 13a is returned to the state before the sensor detecting unit 132 is displaced. Therefore, the engraving depth of the position rod 82 can be immediately corrected so as to be equal to the engraving depth before the sensor detection unit 132 moves up and down.
[0084]
That is, the surface processing apparatus X according to the present invention controls the lifting / lowering movement of the lifting / lowering unit 120 by the sensor 140 in accordance with the lifting / lowering movement of the contact member 130 each time there is an uneven surface on the surface 82. Then, a sensing process is performed to keep the surface processing depth constant.
[0085]
Meanwhile, the contact member 130 may be configured to have a threshold position serving as a reference for on-off control of the sensor. With this configuration, the contact member 130 can be protruded while having a simple configuration such as turning off the sensor 140 when the contact member 130 deviates below a preset threshold position. The state, that is, the vertical position of the elevating part 120 can be recognized accurately.
[0086]
In the case of engraving characters on the surface of the workpiece 82 such as a wood block, the engraving area is usually divided into a plurality of blocks.
[0087]
For example, a case where a Chinese character “heat” is engraved is illustrated. In this case, the engraving area is divided into blocks 161 to 166 as shown in FIG.
[0088]
When engraving these blocks, first, engraving is performed from an arbitrary block (for example, block 161). In the engraving process, engraving is started after performing the above-described processing depth calibration process, fixing process, and height adjusting process. At this time, the sensor 140 is at a height position (threshold position) at which the processing tool 13 maintains a desired surface processing depth.
If the surface of the workpiece 82 is uneven during the engraving process, a sensing process is performed.
[0089]
When the engraving process of the block 161 is completed, the elevating part 120 is raised from the block 161 and the abutting member 120 is lowered from the threshold position so that the abutting member 130 and the processing tool 13 are attached to the covered part. Separated from the workpiece 82. At this time, the sensor 140 is turned off.
[0090]
Then, after moving the traveling unit 110 onto another block (for example, the block 162) different from the block 161, the elevating unit 120 is lowered.
[0091]
Further, a height adjusting process is performed to stop the descent of the elevating unit 120 when the contact member 130 is pushed to the threshold position. At this time, the sensor 140 is on-controlled.
[0092]
Thereafter, the same operation is repeated from block 163 to block 166, the engraving process of the Chinese character “heat” is finished, and the process proceeds to engraving of the next character or the like.
[0093]
Therefore, since the height of the elevating part 120 is corrected for each block in the block 161 and the block 162, the elevating part with respect to the surface of the work piece is different from the block 162 in the block 162. The height of 120, that is, the engraving depth by the processing tool 13 is substantially equal. Thus, if the height of the elevating part is frequently corrected for each block, the surface of the workpiece 82 is inclined, etc. Since the processing depth is almost uniform in all these blocks, the processing accuracy is improved.
[0094]
In addition, this invention is not limited to the said embodiment, As long as there exists the same effect, the structure of each part can be changed suitably.
[Brief description of the drawings]
FIG. 1 is a schematic view of a surface processing apparatus of the present invention.
FIG. 2 is a schematic view of the main part of the lifting part
FIG. 3 is a schematic diagram of a main part of a traveling unit and a lifting unit.
FIG. 4 is a schematic diagram of the main part of an elevating part.
FIG. 5 is a schematic view of a surface copying member.
FIG. 6 is a schematic view of a contact member and a sensor.
FIG. 7 is a schematic view of an embodiment of a surface processing apparatus of the present invention.
FIG. 8 is a diagram showing an engraving area of a workpiece
FIG. 9 is a schematic view of a conventional surface processing apparatus.
FIG. 10 is a schematic view of a conventional processing tool.
[Explanation of symbols]
13 Processing tools
82 Workpiece
110 Traveling part
120 Lifting part
130 Contact member
140 sensors

Claims (3)

A traveling unit movable along the surface of the workpiece, and a lifting unit held by the traveling unit so as to be movable up and down with respect to the workpiece,
The lifting unit includes a processing tool for surface processing the workpiece, a surface copying member for holding the processing tool, and an elastic member for biasing the surface copying member toward the workpiece. Yes,
The surface processing apparatus further includes a surface processing region forming unit that determines a target region to be surface-processed on the workpiece, and a lifting control unit that controls the lifting and lowering movement of the lifting unit . On the front end side, a contact member capable of contacting and sliding with the surface of the workpiece is provided to be movable up and down with respect to the surface copying member , and the height position of the contact member with respect to the surface copying member Including a sensor capable of detecting the surface over the surface copying member and the contact member,
When the predetermined block is processed, when the sensor detects that the abutting member has moved downward, the lifting control unit controls the lifting unit to lower the lifting unit so as to eliminate the downward movement. apparatus.   The surface processing apparatus according to claim 1, wherein the contact member surrounds the processing tool, and suction means for sucking a surface processing residue is communicated with the contact member. The contact member has a threshold position serving as a reference for on-off control of the sensor;
If the target area for surface processing on the workpiece is divided into a plurality of blocks, after processing a predetermined block, wherein the elevation controller is by Rukoto raising the lifting portion, said abutment member Lowering from the threshold position to separate the contact member and the processing tool from the workpiece;
After moving the traveling part on different other blocks from the predetermined block, the lift control unit lowers the elevating unit and the lift when the abutting member is pushed to the threshold position The surface processing apparatus of Claim 1 or 2 comprised so that the fall of a part might be stopped.

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