Method and device for processing irregularly shaped workpieces

Abstract

To provide a novel groove formation technique for, even when an extremely heavy workpiece whose shape is a non-standard shape, is undefinedly arranged on a work table, performing groove finish processing to the workpiece at one stroke.SOLUTION: A groove processing device 1 comprises: a work table 2; a groove cutter 55 and a workpiece sensor unit which are movable above the work table in a three-dimensional direction; and a control unit 63 which can set groove processing on the basis of, actual workpiece edge data of the workpiece W acquired by the workpiece sensor unit. The control device 63 performs control in which, the actual workpiece edge data detected by the workpiece sensor unit, and basic shape data of the workpiece W which was input in advance, are compared and determined, on the basis of the comparison and determination data, along a necessary part of the workpiece W, the groove cutter 55 is acted for performing groove processing.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a groove preparation method for metal components, and in particular to a groove preparation method for irregular-shaped workpieces, which efficiently prepares grooves for subsequent welding processes on workpieces that have non-standard shapes and are indefinitely set on a work table. The present invention relates to a groove preparation method and an apparatus for the same. [Background technology]

[0002] For example, when manufacturing a high-load-bearing box-section component with a bend in the middle, such as an arm component for heavy construction machinery or a structural component for architecture, a panel component that will become the curved side portion is prepared as a part of the component. Many of these panel components have a non-standard shape according to the design specifications, and grooves are prepared in advance at required locations for welding to other components that are combined with them. The conventional method for achieving this involves first blanking out the raw steel plate material into a shape that corresponds to the design specifications by laser cutting or the like, and then using a laser cutter with its operating direction set at an angle to the required locations where groove preparation is required, and then performing rough chamfering by melt cutting (see, for example, Patent Document 1).

[0003] Due to this type of fusion cutting technique, the groove surface is not smoothly finished, so further manual finishing with a sander or the like is performed as finishing groove processing to smooth out the roughly machined groove surface. Naturally, this method requires a lot of time and effort to complete the process, which involves the steps of blanking the work, moving the work, rough edge preparation, moving the work, and finishing edge preparation. Incidentally, most of the objects to be processed are heavy, weighing tens to hundreds of kilograms, and even the task of moving them is difficult and time-consuming because it is difficult to place them in the correct working position due to their weight. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-62003 A Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention was made in recognition of this background, and its technical objective was to develop a method for performing groove finishing processing on a blanked workpiece in one go, and also to develop a groove processing method and device for irregularly shaped workpieces that can accommodate cases where the workpiece itself has a non-standard shape, is very heavy, and is irregularly positioned on the work table. [Means for solving the problem]

[0006] First, the groove processing method for an irregular workpiece according to claim 1 is as follows: A method for processing a workpiece having a non-standard shape and an irregular shape that is irregularly installed on a work table, and performing groove processing on a necessary portion of the workpiece, This method is A work table on which the work is placed; A groove cutter that is movable in three dimensional directions above the work table; a work sensor unit movable in three dimensional directions above the work table; This is performed using a groove processing device equipped with a control device that sets groove processing based on the actual work edge data of the workpiece acquired by the workpiece sensor unit, The control in the control device compares and judges the actual work edge data detected by the work sensor unit with the basic shape data of the work input in advance, and performs groove processing by operating a groove cutter along the required part of the work based on this comparison and judgment data. It is something that The control in the control device not only compares the actual work edge data with the basic shape data, but also takes into consideration the installation state of the work set on the work table using the magnetic support as a fixing means, and based on these judgment results, corrects the deviation between the actual work edge data and the basic shape data, while maintaining the contour of the work in the basic shape data, and specifies the action range of the groove cutter; Furthermore, a laser sensor is applied to the workpiece sensor unit, If the actual work edge deviates from the sweep range during sensing by the work sensor unit, it is determined that the actual work edge is significantly displaced from the basic shape data in a plan view, and the basic shape data is corrected to match the actual work edge, and then sensing of the actual work edge is performed again.The present invention is characterized by the following points.

[0007] Also, claims 2 The groove processing method for an irregular workpiece described in the claims Article 1 In addition to the requirements listed above, The data to be input in the control device prior to groove processing includes the basic shape data of the workpiece, Data on the installation position and height of the workpiece set on the worktable, Bevel shape data and bevel processing position data for the bevel processing applied to the workpiece, Route dimension data for the vertical end face range where no groove is actually formed on the workpiece The present invention is characterized in that the data is at least one of the above.

[0008] Also, claims 3 The groove processing method for an irregular workpiece described in the claims 1 or 2 In addition to the requirements listed above, The control device is characterized in that, even if sensing of the actual work edge is performed again after the correction, if the work edge again deviates from the sweep range during the sensing, the control device outputs an instruction to interrupt operation and also outputs an instruction to change the way the work is placed.

[0009] Also, claims 4 The groove processing device for an irregular workpiece described above is A machine that processes a workpiece of irregular shape that is irregularly shaped and randomly installed on a work table, and performs groove processing on a necessary portion of the workpiece, This device is A work table on which the work is placed; A groove cutter that is movable in three dimensional directions above the work table; a work sensor unit movable in three dimensional directions above the work table; A control device that sets groove processing based on actual work edge data of the work acquired by the work sensor unit, The control device is configured to compare and judge the actual work edge data detected by the work sensor unit with the basic shape data of the work input in advance, and perform groove processing by operating the groove cutter along the required part of the work based on this comparison and judgment data. the law of nature, The control in the control device is configured to compare the actual work edge data with the basic shape data, and also to take into consideration the installation state of the work set on the work table using the magnetic support as a fixing means, and to determine the operating range of the groove cutter while maintaining the contour of the work in the basic shape data while correcting the deviation between the actual work edge data and the basic shape data based on these judgment results, Furthermore, a laser sensor is applied to the workpiece sensor unit, If the actual work edge deviates from the sweep range during sensing by the work sensor unit, it is determined that the actual work edge is significantly displaced from the basic shape data in a plan view, and the basic shape data is corrected to match the actual work edge, and then sensing of the actual work edge is performed again. The present invention is characterized by the following points.

[0010] Also, claims 5 The groove processing device for an irregular workpiece described in the claims 4 In addition to the requirements listed above, The data to be input in the control device prior to groove processing includes the basic shape data of the workpiece, Data on the installation position and height of the workpiece set on the worktable, Bevel shape data and bevel processing position data for the bevel processing applied to the workpiece, Route dimension data for the vertical end face range where no groove is actually formed on the workpiece The present invention is characterized in that the data is at least one of the above.

[0011] Also, claims 6 The groove processing device for an irregular workpiece described in the claims 4 or 5 In addition to the requirements listed above, The control device is characterized in that, even if sensing of the actual work edge is performed again after the correction, if the work edge again deviates from the sweep range during the sensing, the control device outputs an instruction to interrupt operation and also outputs an instruction to change the way the work is placed.

[0012] Also, claims 7 The groove processing device for an irregular workpiece described in the claims 4 from 6 In addition to any one of the requirements listed above, The work table is equipped with a support block on its upper surface, and this support block has a cutting chip removal hole opened in it, and the space below the support block is provided with a chute covering the side surface and a recovery conveyor provided below that. The above problems are solved by the configurations of the inventions described in each of these claims. Effect of the Invention

[0013] First, claim 1 or 4 According to the described invention, the actually detected actual work edge data is compared and judged against the basic shape data of the workpiece input in advance as DXF data or the like, and grooves are prepared at the necessary locations of the workpiece. Therefore, even for very heavy workpieces that are irregularly positioned on the worktable, grooves can be prepared accurately and reliably. Furthermore, the groove preparation itself can be performed up to the finishing stage by simply applying the groove cutter once to the required area of ​​the workpiece, for example along one side, so groove preparation of heavy and irregularly shaped workpieces can be performed extremely efficiently. Furthermore, according to the present invention, the control in the control device compares the actual work edge data that is actually detected with the basic shape data of the work that has been input in advance as DXF data or the like, and also takes into account the installation state of the work (installation data), thereby enabling groove processing that is more suitable for the actual work. Furthermore, according to the present invention, since a laser sensor is applied as the workpiece sensor unit, the structure of the workpiece sensor unit becomes clearer. In addition, when sensing with the workpiece sensor unit, the response when the actual workpiece edge deviates from the sweep range becomes clear.

[0014] Also, claims 2 or 5 According to the described invention, the data to be input to the control device is specified in advance.

[0015] Also, claims 3 or 6 According to the described invention, even if sensing of the actual work edge is performed again, if the work edge deviates from the sweep range during sensing, operation is interrupted and an instruction is given to replace the work, making it clear how to respond when the work edge is outside the sensor range during the second sensing and specifying careful groove processing.

[0016] Also, claims 7According to the described invention, the support block on which the workpiece is directly placed is provided with a cutting chip removal hole, and below that is provided a recovery conveyor with a chute on the side, so that cutting chips generated from the workpiece during groove processing can be dropped downward through the cutting chip removal hole in the support block and placed on the recovery conveyor for smooth discharge outside the device. Therefore, cutting chips are rarely left on the work table (support block), and subsequent groove processing can be performed more smoothly and reliably. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1A is a perspective view showing an example of a groove processing device of the present invention, and FIG. 1B is an explanatory view showing two enlarged views of the groove processing. [Figure 2-1] FIG. 2 is a front view showing an example of a groove processing device. [Figure 2-2] FIG. [Figure 2-3] FIG. [Diagram 3] FIG. 11 is a vertical cross-sectional view showing how cutting chips generated from a workpiece during groove processing are dropped downward and removed to the outside of the device. [Figure 4-1] FIG. 11 is a perspective view showing a configuration for lifting and lowering and moving the groove cutter and the workpiece sensor unit left and right. [Figure 4-2] FIG. [Figure 4-3] FIG. [Figure 5-1] 1 is a perspective view showing a traveling frame that moves along the longitudinal direction of the work table when performing groove processing. FIG. [Figure 5-2] FIG. 4 is a vertical cross-sectional view of the leg frame. [Figure 6-1] FIG. 4 is a perspective view showing an upper frame of the traveling frame. [Figure 6-2] FIG. [Figure 7-1] FIG. 11 is a perspective view showing a configuration for raising and lowering a groove cutter and a workpiece sensor unit. [Figure 7-2] FIG. [Figure 7-3] FIG. [Figure 8-1] FIG. 2 is a perspective view of the workpiece sensor unit as viewed from below. [Figure 8-2] This is a projection view (bottom view) seen from above and below. [Figure 9] FIG. 1 is an explanatory diagram showing a flowchart (one example) for performing groove processing. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] The present invention is as shown in the following examples, but these examples can be modified as appropriate within the scope of the technical concept of the present invention. EXAMPLES

[0019] The present invention will be specifically described below based on the illustrated embodiment. In the description, the groove processing device for irregular workpieces (hereinafter simply referred to as groove processing device) 1 according to the present invention will be described, and then the processing method for irregular workpieces (hereinafter referred to as processing method) will be described while explaining the operation mode of the device.

[0020] The groove processing device 1 of the present invention performs groove processing on a workpiece W, which is mostly made of irregular metal material. First, the "irregular shape workpiece" in the title of the present invention will be described. The workpiece W is not a simple shape such as a straight line in the processed part of, for example, H-shaped steel or flat steel strip having standard dimensions, but has a so-called irregular shape that is a non-standard shape including curves according to the design specifications of the machine parts. The reason why the "irregular shape" is defined is that the irregularly shaped workpiece W is not necessarily placed in a fixed position or posture on the work table 2 where the groove processing is further performed, and is often placed in an irregular manner. These situations, that is, the fact that the workpiece W itself is a non-standard irregular shape and that it is placed in an irregular manner, are all referred to as irregular shape. The form of the workpiece W itself can take a variety of forms depending on the design specifications, such as a bracket- or flange-shaped member that protrudes inward from a structural member, or a side panel member that forms the curved portion of a curved box cross-section structural member (see Figure 1(a)).

[0021] The groove preparation device 1 will be described below. As shown in Figs. 1 to 4 as an example, the groove processing device 1 broadly comprises a work table 2, a traveling frame 3, a traverse saddle 4, a lifting spindle unit 5, and an operation panel 6 as main components. First, we will explain the work table 2, which serves as the base member. This is constructed with a support frame 21 as a strength member, and a traveling guide rail 22 that supports the traveling frame 3 is provided on its side. A rack 23 that contributes to driving the traveling frame 3 is provided along one of the traveling guide rails 22 below it. Meanwhile, a support block 24 is provided above the support frame 21 using suitable beam members as support members. That is, the support block 24 is, for example, formed by combining a plurality of members cut into rectangular shapes in a plan view on the upper surface of the work table 2, and as a whole forms the table surface of the work table 2. Note that, when supporting the work W above this support block 24, it is magnetically held by a magnetic support base 25 provided on the upper surface of the support block 24.

[0022] Furthermore, the support block 24 has a cutting chip removal hole 26 formed in each block body, and cutting chips W0 generated during groove processing of the workpiece W are allowed to fall below through the cutting chip removal hole 26. but This prevents cutting powder W0 from remaining on the table surface. As an example, as shown in Figure 3 above, when adjacent support blocks 24 are combined, a portion of the adjacent lower portion is removed to form a T-slot 27 that allows the magnetic support base 25 to be appropriately fixed in the combined state. Furthermore, as described above, the space below this support block 24 is a space used for collecting cutting chips W0 generated during groove processing, and a tapered chute 28 is provided along the inside of the support frame 21, and a collection conveyor 29 is provided below this chute 28.

[0023] Next, the traveling frame 3 that travels above the work table 2 will be described. The traveling frame 3 is configured as a gate-shaped frame, so to speak, with an upper frame 32, as shown in Figures 4 to 6, combined above a pair of leg frames 31, and the inside of the leg frames 31 is equipped with a traveling linear bearing 33 that is combined with the traveling guide rail 22 on the work table 2 (see Figure 5-1). Furthermore, as shown in Fig. 5-2 as an example, a shift pinion 34 that meshes with the rack 23 of the work table 2 is provided on the inside of one of the leg frames 31. This shift pinion 34 is rotated by a traveling motor 34M arranged nearby. Regarding the shift pinion 34 and the rack 23, since the traveling frame 3 is required to move extremely accurately, the meshing relationship between the rack 23 and the shift pinion 34 is so-called trochoidal contact, and a meshing state without so-called backlash is realized.

[0024] On the other hand, as shown in Fig. 4 and Fig. 6, for example, a lateral guide rail 35 is provided on the upper frame 32 of the traveling frame 3, which supports a lateral saddle 4 (described later) (see Fig. 4 to Fig. 7). In order to drive the lateral saddle 4, a lateral screw shaft 36 is disposed along the lateral guide rail 35 and is rotationally driven by a lateral shift motor 36M. The traveling frame 3, including the traverse saddle 4 and the lifting spindle unit 5, is covered by a safety cover 37 that surrounds them (see Figs. 1 and 2).

[0025] Next, the traverse saddle 4 supported by the traveling frame 3 will be described. The traverse saddle 4 has a traverse base 40 as a base member, and the traverse base 40 has an inverted L-shaped side shape with an upper plate 40A and a front plate 40B as shown in Fig. 4-1 as an example. A traverse linear bearing 41 is provided below the upper plate 40A and the front plate 40B, and this traverse linear bearing 41 is combined with the two traverse guide rails 35 of the traveling frame 3 in a fitted state. Furthermore, a traverse female thread block 42 that is screwed onto the traverse screw shaft 36 attached to the traveling frame 3 is provided on the front plate 40B of the traverse base 40 (see FIG. 4-3). The front plate 40B is also provided with an elevation linear bearing 43 that is combined with an elevation rail 51 provided on the elevation spindle unit 5 described later to guide the elevation spindle unit 5 so that it can move up and down freely. Further, an elevation screw shaft 44 is provided so as to extend vertically from the upper plate 40A of the traverse base 40, and this is rotated by an elevation shift motor 44M above.

[0026] Next, the lifting spindle unit 5 that is supported by the traverse saddle 4 and moves up and down will be described. The lifting spindle unit 5 has a lifting frame 50 as a base member, and the lifting frame 50 is composed of an upright frame 50A and an overhanging frame 50B, and supports a groove cutter 55 that performs the groove cutting work and a work sensor unit 56 that detects the workpiece W. In this embodiment, examples of the groove cutter 55 include a R-shaped groove (also called a V-shaped groove) as shown in FIG. 1(b) and a K-shaped groove.

[0027] The lift frame 50 will now be described. The lifting frame 50 has two lifting rails 51 on the upright frame 50A on the side facing the traverse saddle 4. The lifting rails 51 are guided by the lifting linear bearings 43 in the traverse saddle 4, and the lifting spindle unit 5 moves up and down. In addition, a lifting thread block 52 is provided between the two lifting rails 51. This lifting thread block 52 is screwed into the lifting screw shaft 44 in the traverse saddle 4. As the lifting screw shaft 44 rotates, the lifting spindle unit 5 moves up and down. Further, a spindle holder 53 is supported on the lift frame 50, and this spindle holder 53 supports a spindle 54 of a groove cutter 55 so as to be freely rotatable. On the other hand, a cutter motor 55M that drives the groove cutter 55 is attached to the protruding frame 50B, and rotation is transmitted between the output shaft of the cutter motor 55M and the main shaft 54 ​​by a toothed belt or the like.

[0028] Furthermore, the lifting spindle unit 5 is equipped with a groove cutter 55 for performing such groove processing, as well as a workpiece sensor unit 56 for sensing the edge (fringe) of the workpiece W placed on the worktable 2. This workpiece sensor unit 56 is configured to be able to move up and down using a sensor lifting rail 57 provided on the front side of the spindle holder 53 in the lifting spindle unit 5 as a guide member (see Figs. 4-3 to 8). Specifically, a female thread block (not shown) is provided on a sensor base plate 58, and the sensor lifting rail 57 is combined with the female thread block. By This vertical movement is achieved by shifting the sensor lifting and lowering cylinder 58C provided above the sensor base plate 58. The sensor probe 56P of the workpiece sensor unit 56 is , Re The laser sensor uses a laser sensor that emits laser light, and since the sensing range of the laser sensor is a flat rectangular range, the sensor probe 56P is configured to be either vertically or horizontally oriented depending on the shape of the workpiece W. In other words, a rotary actuator is provided above the workpiece sensor unit 56 so that the sensor probe 56P can be displaced by 90 degrees. Here, reference numeral 56C in the drawing denotes a unit cover for protecting the various components of the workpiece sensor unit 56, and reference numeral 57L denotes a sensor lifting linear bearing fitted onto the outside of the sensor lifting rail 57.

[0029] The groove processing device 1 of the present invention is further provided with an operation panel 6 beside the device that is the main body of the device described above. This operation panel 6 is equipped with a browser 61 that visually displays various data, an input board 62 that inputs appropriate commands, and a control device 63 that analyzes sensing data obtained from the work sensor unit 56. Naturally, the shape of the control device 63 itself is not particularly specified, so in the illustrated state, it is illustrated as a so-called block-shaped symbol.

[0030] The groove processing device 1 of the present invention has the basic structure as described above. Below, the operation of this device will be explained, along with a groove processing method for an irregular-shape workpiece. As an example of a groove preparation method for irregular workpieces, the method shown in the flowchart in FIG. 9 is a practically preferable embodiment, and the following description will be given based on this flowchart.

[0031] <Step 1: Input basic shape data> First, in step 1 of the flowchart, a worker (operator) operates the input board 62 of the operation panel 6 provided beside the device, and inputs basic information about the workpiece W, that is, basic shape data, into the control device 63. This basic shape data is data on the form of the workpiece W to be processed, and specifically includes so-called specification information such as the contour shape, material, thickness, etc. of the workpiece W. It is preferable to apply DXF data, which is general-purpose data, to this basic shape data, especially the contour shape of the workpiece W. Of course, when the design and development of the workpiece W and the subsequent processing from blanking to groove processing are all performed within the same company, software data dedicated to the company may be applied as appropriate, but when only groove processing is performed separately and exclusively, it is preferable to use DXF data in order to be able to use data from various different processing clients in a general-purpose manner.

[0032] Step 2: Enter installation data Next, in step 2, installation data is input regarding the installation position of the workpiece W. Specifically, since the workpiece W is held by the magnetic support base 25 on the worktable 2 as a fixing means, the installation data includes the floating dimension of the workpiece W by the magnetic support base 25 (height position data), and further data such as the amount of origin deviation (installation position data) indicating how far the workpiece W is from the origin of the worktable 2, which is often the outer edge of the table, and these are input appropriately.

[0033] <Step 3: Entering groove processing data> Next, in step 3, groove processing data is input, which includes groove shape data, groove position data, and the like. First, as the groove shape data, for example, a groove cutter 55, which is a groove tool, is selected according to the groove condition to be formed. In this embodiment, tools suitable for so-called R-shaped grooves and K-shaped grooves are prepared as the groove cutter 55, and either one is selected. Furthermore, regardless of whether the R-shaped groove cutter or the K-shaped groove cutter is selected, the outer nominal diameter of the groove cutter 55 is input. Also, the height direction of the groove cutter 55, that is, the so-called Z reference position, is input, and the upper surface of the support block 24 of the work table 2 is used as the reference surface. In the case of a R-shaped groove, for example, as shown in FIG. 1(b) above, during groove processing, the bottom surface of the groove cutter 55 is approximately aligned with the underside of the workpiece W (strictly speaking, the bottom surface of the groove cutter 55 is located slightly lower than the underside of the workpiece W). On the other hand, in the case of a K-shaped groove, as shown in Fig. 1(b) above, for example, the bottom surface of the groove cutter 55 does not coincide with the bottom surface of the workpiece W. Incidentally, in the case of a K-shaped groove, there are patterns in which the dimensions a and b in the figure are equal (a = b) and patterns in which they are almost equal (a ≒ b), so it is desirable to output the dimensional values ​​a and b on the browser 61 after inputting the height of the groove cutter 55 and the route dimensions (data) described below.

[0034] <Step 3: Enter groove position data> In step 3, groove position data (groove processing position data) is input based on the workpiece contour shape input in DXF format. Specifically, the processing start position and processing end position are input, and for example, while visually viewing the browser 61, the worker inputs a cross mark at the start position and end position on the browser. Of course, in addition to such two-point input, that is, input of the start point and end point of groove processing, after inputting only the start position, the end position may be automatically determined taking into account the processing length. In addition, the part on the workpiece W where groove processing is performed may be the entire circumference (the entire outer circumference and the entire inner circumference) of the workpiece W, or only one side constituting the outer circumference of the workpiece W. Furthermore, it is also possible to set the processing position from the middle to the middle of one side of the workpiece W. In addition, it is preferable to display the length of the processing range on the browser along with the input of such groove position data, and for example, when the processing position is a part or the whole of the arc, it is preferable to display the length (the length of the arc where the groove processing is performed).

[0035] <Step 3: Enter route dimension data> Furthermore, in step 3, root dimension data is also input. Here, the root dimension indicates the dimension of the vertical end face range where no groove is formed in most cases if the workpiece W is plate-shaped, for example as shown in Fig. 1(b), and this root dimension setting is determined by the lateral movement of the groove cutter 55, i.e., the amount of movement of the groove cutter 55 to approach or move away from the workpiece W in the horizontal direction. Furthermore, the cutting speed and the like are also input. It is preferable that the input data is displayed on the browser as processing information or processing data. It is also preferable that the processing range and the like are displayed on the browser in a color such as red against the contour line of the workpiece W.

[0036] <Step 4: Detecting the actual workpiece edge> Next, in step 4, detection of the actual workpiece edge is started. That is, in this step 4, the actual edge of the workpiece W set on the work table 2 (magnetic support base 25) is sensed, and the actual contour of the workpiece W is detected. This detection is performed to check whether the contour of the actual workpiece W matches the contour data (basic shape data) entered as DXF data, and since there is usually a deviation, this is a step to detect the extent of the deviation. At this time, defects in the workpiece W or defects in the DXF data are not taken into consideration. Furthermore, when sensing the actual work edge, as described above, a laser beam is irradiated from the work sensor unit 56 (sensor probe 56P). Since this irradiation range is rectangular in a plan view, for example, when the area line of the work edge to be sensed is in the range of 0 degrees to 45 degrees, the sensor probe 56P is sensed in a 0 degree position, and when the area line is in the range of 45 degrees to 90 degrees, the sensor probe 56P is sensed in a position rotated 90 degrees (90 degree position). This makes it possible to detect the entire outer periphery of the work W over a relatively wide sensing range.

[0037] During sensing, if the actual work edge is within the sensing range (irradiation range), the process moves to the subsequent groove processing, but depending on how the work W is placed, the actual work edge may not be within the sensing range and may deviate from the range. Therefore, in step J1, the work sensor unit 56 during sensing constantly judges whether it is within such a range, that is, whether the sensor probe 56P is capturing the actual edge of the work W. Specifically, the work sensor unit 56 moves in the XY directions while sensing the actual work edge, and the movement of the work sensor unit 56 in the XY directions is performed with reference to the basic shape data (DXF data) that has been input in advance.

[0038] Of course, during sensing of the work edge, the movement amount in the XY direction of the work sensor unit 56 is constantly compared with the basic shape data (DXF data). Normally, it is rare that the actual work edge data detected by the work sensor unit 56 completely matches the basic shape data input in advance, and therefore the actual work edge data generally deviates to some extent from the basic shape data. For this reason, for example, if this deviation falls within the sensing range of the work sensor unit 56, the detection of the actual work edge is terminated in step 5. Then, in step 6, the actual work edge data actually detected is compared with the shape data of the work W that was previously input, and the degree of deviation, which is usually the inclination in a planar view, is corrected to determine (set) the movement trajectory of the groove cutter 55.

[0039] <Step J1: First Judgment> On the other hand, if during sensing of the work edge, the detected actual work edge data deviates significantly from the basic shape data input in advance, specifically, if the edge of the work W can no longer be captured within the irradiation range (sweeping range) of the sensor probe 56P, it is determined in the above step J1 that it is outside the sensor range, and the process proceeds to step 5'. In this way, when it is found that the actual workpiece edge data is significantly different from the basic shape data input in advance, in step 5', the inclination of the basic shape data is appropriately changed or the basic shape data is rotated somewhat to correct the basic shape data of the workpiece W, and then the detection of the actual workpiece edge is redone. In other words, the movement trajectory of the workpiece sensor unit 56 is reset, and the detection of the contour of the workpiece W is started again.

[0040] <Step J2: Second Judgment> Of course, in this re-detection, similarly to step J1, there are cases where the workpiece edge detection falls within the sensor range and cases where it does not fall within the sensor range (outside the sensor range), and this is step J2. Then, in this step J2, if the work edge detection performed again is within the sensor range, the process proceeds to the above step 5, the actual work edge detection is completed, and the process proceeds to step 6 as described above to prepare for groove processing.

[0041] On the other hand, if it is determined that the workpiece sensor unit 56 cannot capture the actual workpiece contour even after the workpiece edge detection is performed again in step 5', it is determined that the workpiece is out of the sensor range in step J2, and sensing and other operations are temporarily suspended. Then, the operator is instructed to change the placement of the workpiece W, and once the workpiece W is placed again, the process returns to step 1 and the series of operations is repeated, so to speak, to be cautious. In addition, the workpiece W can be moved relatively easily on the work table 2 even if it is a heavy workpiece W. That is, in this embodiment, the workpiece W is magnetically attracted to the magnetic support base 25, and this magnetic support base 25 is fixed on the work table 2 by using the T-slot 27. Therefore, when the above-mentioned fixing is performed, for example, by fitting the bolt head (approximately T-shaped in cross section) of a T-slot bolt into the T-groove of the T-slot 27 formed in the work table 2 and screwing a nut from the bolt tip of the T-slot bolt, the workpiece W can be slid on the work table 2 along the T-slot 27 together with the magnetic support base 25 by loosening the nut appropriately, and even if the workpiece W is a heavy workpiece W, it can be easily moved (repositioned) without imposing a large burden on the worker.

[0042] Steps 6 and 7: Bevel preparation As described above, detection of the actual work edge is finally completed in step 5, then in step 6 a comparison is made with the basic shape data (DXF data) previously input, and then in step 7 a signal to perform groove processing is output. When performing groove processing, the lifting spindle unit 5 moves in the XYZ directions as appropriate, moving along the required groove processing range for the workpiece W while taking into account the already set route dimensions (route amount), etc., to perform groove processing on part or all of the contour of the workpiece W. In the present invention, the groove finishing of the required portion can be performed by simply applying the groove cutter 55 once to the required portion of the workpiece W. It is inevitable that cutting chips W0 will be generated from the workpiece W during groove processing, but this cutting chips W0 will fall below the support block 24 through the cutting chip removal hole 26 provided in the support block 24 and be discharged to the outside by the recovery conveyor 29. As a result, almost no cutting chips W0 remain on the work table 2 (support block 24), and the subsequent groove processing can be performed smoothly and reliably.

[0043] Other Examples The present invention is based on the above-described embodiment as one basic technical concept, but the following modifications can be considered. First, regarding the groove cutter 55, for example, in addition to a cutter for a L-shaped groove, there are also two types, a cutter for a K-shaped groove, or even if the groove cutter has the same shape, various groove cutters may be prepared according to their dimensions, etc., and several of these may be arranged in parallel in advance on the lifting spindle unit 5, and the groove processing may be performed using only the necessary groove cutter.

[0044] In addition, when detecting the actual work edge (sensing by the work sensor unit 56), in the basic embodiment described above, a non-contact sensor probe 56P is used that irradiates laser light onto the edge of the work W, and its movement is based on the basic shape data that has been input in advance. where The workpiece sensor unit 56 can also use a contact-type sensor probe 56P. It is possible, but this is a reference form related to the present invention. And, in this reference form The sensor probe 56P is always kept in contact with the edge of the workpiece W, and the sensor probe 56P is automatically moved around the periphery of the workpiece W to obtain data on the actual workpiece edge. Think Alternatively, the operator can manually move the sensor probe 56P along the edge of the workpiece W and obtain data on the actual workpiece edge using a so-called teaching function. Think do. Furthermore, as the workpiece sensor unit 56, a laser sensor capable of detecting a wide range with high accuracy may be used, and a detection method in which the entire surface of the workpiece table 2 is scanned may also be used. [Explanation of symbols]

[0045] 1. Bevel processing equipment (Bevel processing equipment for irregular workpieces) 2 Worktable 3 Running frame 4. Traverse Saddle 5. Lifting spindle unit 6 Control panel 21 Abutment frame 22 Travel guide rail 23 Rack 24 Bearing block 25 Magnetic support base 26 Cutting dust removal hole 27 T-Slot 28 SHOTS 29 Collection conveyor 31 Leg frame 32 Upper Frame 33 Traveling Linear Bearing 34 Shift pinion 34M Travel motor 35 Traverse guide rail 36 Transverse screw shaft 36M Traverse shift motor 37 Safety Cover 40 Traverse Base 40A top plate 40B Front plate 41 Traverse Linear Bearing 42 Traverse female thread block 43 Lifting Linear Bearing 44 Lifting screw shaft 44M Lift / lower shift motor 50 Lifting Frame 50A Upright Frame 50B Extension Frame 51 Lifting rail 52 Lifting female thread block 53 Spindle holder 54 Main axis 55 Groove cutter 55M Cutter Motor 56 Work sensor unit 56P Sensor Probe 56C Unit Cover 57 Sensor lift rail 57L Sensor lift linear bearing 58 Sensor base plate 58C Sensor lift cylinder 61 Browsers 62 Input Board 63 Control device Double work W0 cutting powder

Claims

1. A method for processing a workpiece having a non-standard shape and an irregular shape that is irregularly installed on a work table, and performing groove processing on a necessary portion of the workpiece, This method is A work table on which the work is placed; A groove cutter that is movable in three dimensional directions above the work table; a work sensor unit movable in three dimensional directions above the work table; This is performed using a groove processing device equipped with a control device that sets groove processing based on the actual work edge data of the workpiece acquired by the workpiece sensor unit, The control in the control device compares and judges the actual work edge data detected by the work sensor unit with the basic shape data of the work input in advance, and performs groove processing by operating a groove cutter along the required part of the work based on this comparison and judgment data. The control in the control device not only compares the actual work edge data with the basic shape data, but also takes into consideration the installation state of the work set on the work table using the magnetic support as a fixing means, and based on these judgment results, corrects the deviation between the actual work edge data and the basic shape data, while maintaining the contour of the work in the basic shape data, and specifies the action range of the groove cutter; Furthermore, a laser sensor is applied to the workpiece sensor unit, This method for processing grooves on irregular workpieces is characterized in that, if the actual work edge deviates from the sweep range during sensing by the workpiece sensor unit, it is determined that the actual work edge is significantly deviated from the basic shape data in a planar view, the basic shape data is corrected to match the actual workpiece edge, and then sensing of the actual workpiece edge is performed again.

2. The data to be input in the control device prior to groove processing includes the basic shape data of the workpiece, Data on the installation position and height of the workpiece set on the worktable, Bevel shape data and bevel processing position data for the bevel processing applied to the workpiece, Route dimension data for the vertical end face range where no groove is actually formed on the workpiece 2. The method for processing an irregular workpiece according to claim 1, wherein the data is at least one of the following:

3. The method for processing an irregular workpiece as described in claim 1 or 2, characterized in that even if sensing of the actual workpiece edge is performed again after the correction, if the workpiece edge again deviates from the sweep range during the sensing, the control device outputs an instruction to interrupt operation and an instruction to change the way the workpiece is placed.

4. A machine that processes a workpiece of irregular shape that is irregularly shaped and randomly installed on a work table, and performs groove processing on a necessary portion of the workpiece, This device is A work table on which the work is placed; A groove cutter that is movable in three dimensional directions above the work table; a work sensor unit movable in three dimensional directions above the work table; A control device that sets groove processing based on actual work edge data of the work acquired by the work sensor unit, The control device compares and judges the actual work edge data detected by the work sensor unit with the basic shape data of the work input in advance, and performs groove processing by applying a groove cutter along a required part of the work based on the comparison and judgment data. The control in the control device is configured to compare the actual work edge data with the basic shape data, and also to take into consideration the installation state of the work set on the work table using the magnetic support as a fixing means, and to determine the operating range of the groove cutter while maintaining the contour of the work in the basic shape data while correcting the deviation between the actual work edge data and the basic shape data based on these judgment results, Furthermore, a laser sensor is applied to the workpiece sensor unit, This is a groove processing device for irregular workpieces, characterized in that if the actual workpiece edge deviates from the sweep range during sensing by the workpiece sensor unit, it is determined that the actual workpiece edge is significantly positioned away from the basic shape data in a planar view, and the basic shape data is corrected to match the actual workpiece edge, and then sensing of the actual workpiece edge is performed again.

5. The data to be input in the control device prior to groove processing includes the basic shape data of the workpiece, Data on the installation position and height of the workpiece set on the worktable, Bevel shape data and bevel processing position data for the bevel processing applied to the workpiece, Route dimension data for the vertical end face range where no groove is actually formed on the workpiece 5. The groove processing device for irregular workpieces according to claim 4, characterized in that the data is at least one of the following:

6. The groove processing device for irregular workpieces as described in claim 4 or 5, characterized in that if the workpiece edge again deviates from the sweep range during sensing even after the correction, the control device outputs an instruction to interrupt operation and an instruction to change the way the workpiece is placed.

7. The groove processing device for irregular workpieces as described in any one of claims 4 to 6, characterized in that the work table has a support block on its upper surface, the support block has a cutting powder removal hole opened in it, and the space below the support block is provided with a chute covering the side surface and a recovery conveyor provided below the chute.

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