EP3732540A1

EP3732540A1 - Method for machining workpieces and machining system

Info

Publication number: EP3732540A1
Application number: EP18826041.8A
Authority: EP
Inventors: Sergey Martynenko
Original assignee: Homag Plattenaufteiltechnik GmbH
Current assignee: Homag Plattenaufteiltechnik GmbH
Priority date: 2017-12-28
Filing date: 2018-12-20
Publication date: 2020-11-04
Also published as: CN111247493A; WO2019129654A1; WO2019129655A1; EP3732539A1; CN111512252A

Abstract

The invention relates to a method for machining workpieces (12, 14, 74), in which a starting workpiece (12) is initially machined (first machining process) using a first machine tool (10), then the machined workpiece (14) is transported to a second machine tool (72) and subsequently machined (second machining process) using the second machine tool (72), and in which a value of a variable that characterises a quality feature resulting from the first machining process on the machined workpiece (14, 74) is determined or recorded. According to the invention, the value of the variable that characterises the quality feature resulting from the first machining process on the machined workpiece (14, 74) is determined or recorded during the transportation and/or after the transportation of the machined workpiece (14, 74) to the second machine tool (72).

Description

Title: Method for machining workpieces, as well as machining system

description

The invention relates to a method for processing workpieces as well as a processing system with a plurality of machine tools according to the preambles of the respective independent claims.

A machine tool in the form of a

Plate processing plant is known for example from DE 10 2013 204 409 Al. The well-known

Plate processing plant is a dividing saw. On a feed table lying plate-shaped workpieces or

Workpiece stacks become programmatically one

Sawing device fed on a saw carriage is arranged. The saw carriage is movable transversely to the feed direction of the program pusher. The sawing device is designed as a circular saw with a corresponding drive, which sets a circular saw blade in a rotary motion.

From the market are still other machine tools in the form of plate processing equipment for processing

plate-shaped workpieces known. These include

For example, so-called "nesting machines" in which the plate-shaped workpiece, for example with

Milling equipment and / or drilling equipment is processed.

Furthermore, it is known from the market that workpieces machined by a first machine tool in a first machining operation are subsequently machined by a second machine tool in a second machining operation. In the division of plate-shaped workpieces, for example, the plate-shaped

Workpieces divided by a panel sizing (first machining operation), and subsequently the

split workpieces in another

Processing machine, for example one

Edge processing device or a drilling / milling device processed, for example applied edge banding, or they are milled and drilled (second machining operation). This will be the first

Processing process divided workpieces of the

Panel sizing saw to the further processing device, So for example, the edge processing device transported.

It is an object of the present invention to provide a method for operating a machine tool and to provide a plurality of machine tools, with which a high-quality work result can be achieved very efficiently. The requirements for an operator of the machine tool should be as low as possible.

This object is achieved by a method according to the main claim and by a plurality of

Machine tools solved according to the independent claim. Advantageous developments of the invention are specified in subclaims. In addition, the invention features essential features in the following description and in the accompanying drawings. These features, both alone and in

different combinations are essential to the invention.

According to the invention, in a method for machining workpieces, the starting workpiece is first processed by means of a first machine tool. Such a first machine tool may, for example, be a device for processing plate-shaped workpieces, in particular a plate-dividing system or a panel-sizing saw. This processing is referred to as "first processing operation", it being understood that such a first processing operation comprises a plurality of immediately successive partial processing operations. Machining operations in the first machine tool may include.

The machined workpiece produced in this way is then transported to a second machine tool and processed there by means of the second machine tool. This then forms a "second machining operation." Such a second machine tool may in particular be a machine tool in which a

Post-processing of a workpiece machined by the first machine tool takes place. In the case of the above

For example, in the case of the second machine tool mentioned, the above-mentioned plate-dividing system or panel-dividing saw may be an edge-processing device, with which

For example, grooves, holes, or the like can be introduced into an edge region of a previously divided workpiece, or to a device with a

Glue on one in the first processing operation

produced edge can be applied.

In the method according to the invention, a value of a variable which characterizes a quality feature resulting from the first machining operation on the machined workpiece is recorded. This can be easy

Quality control, or, as will be explained in more detail below, for process optimization. According to the invention, the value of the size is determined or detected after the transport of the machined workpiece to the second machine tool. This has the advantage that the normal process sequence for machining the workpiece for the detection of the size does not have to be interrupted. In particular, it is not necessary to additionally separate the machined workpiece for detecting the quality feature or to provide an additional quality standard device in the area of the first machine tool. Rather, the value of the size is simply determined if that by the first

Machining processed workpiece anyway from the process flow of processing by the first

Tool machine was sorted out to transport the machined workpiece from the first machine tool to the second machine tool and on the

machined workpiece to perform the second machining operation in the second machine tool. Separate handling and non-productive times can be omitted.

As a result, the efficiency of the method is improved and the clock rate, ie in particular the number of machined workpieces per unit time increased.

In a first embodiment of the invention

It is proposed in the method that the value of the size, as described above, is detected after the transport to the second machine tool but before the start of the second machining operation. This avoids that the value of the size by the second

Machining process is influenced or falsified. The accuracy in the detection of the value of the size is thus increased. It is particularly preferred if the inventive

The method further comprises the following steps: a) Determining or detecting a value of a variable that characterizes the first machining operation and / or the value of a variable that characterizes a property of a tool that was used for the first machining operation and / or the value of a tool Size that characterizes a property of the workpiece; b) Creating and saving a data record in one

Memory which stores the detected value of the

Quality characteristic with the value of the size that the

Machining process characterized and / or the value of the size, which is a property of the tool

characterized and / or the value of the size that characterizes a property of the workpiece linked.

This development is particularly preferred because it creates a process data record by which certain process parameters with the in this

Quality of the process parameters are linked, whereby a traceable documentation of the first processing operation is obtained, which in turn

Optimization of the process, ie the first

Machining process, with respect to one or more process parameters allows.

After a plurality of first processing operations, there is also a plurality of process data records which possibly the creation of a process model allowed.

Such a process model may, for example, be an algorithm which includes the empirical ones

Correlations between the process parameters and the achieved quality.

The greater the number of existing process records, the more accurate the algorithm can be

Depict relationships. This then allows

For example, with a given tool and a desired quality, the other process parameters to be set in advance so that then with this

Process parameters performed first machining operation the desired quality is achieved. In this

In the exemplary case, the target quality would be the "desired quality." Other possible target variables would be, for example, the throughput, that is to say the number of machined workpieces per time unit or one processing line per

Time unit, or the tool life, ie the number of machining operations, until the tool

must be replaced due to wear.

Thus, this method prepares the basis for a transfer of knowledge from earlier processing operations to a future specifically intended processing operation. The optimal process parameters and the tools are made quickly discoverable, whereby in future processing operations, for example, in frequent

Material changes a significant time savings and thus increase productivity. Further Also, the accuracy of the documentation of the operation of the first machine tool is improved, which simplifies the setting of the first machine tool when processing specific materials or use scenarios. Also, in this way, requirements of

Quality management is enough.

It is understood that the term "capture" is to be understood very broadly

corresponding values of the quantities are detected directly by means of a sensor. For this example comes

Technologies of image recognition in question. But it is also possible that the corresponding values of the sizes are visually recorded by an operator and then by means of a

Input device can be entered. It is also possible that, for example, an identification number of

Tool is detected or detected, and then from this on the basis of a database, which is accessed for example via the Internet, the actually interesting value of the size is determined. It is also possible that individual of the ascertained variables mentioned can be determined from predetermined control signals. Therefore, it is also claimed that the quality feature and / or the value of the size that characterizes the machining process and / or the value of the size that characterizes a property of the tool and / or the value of the size that characterizes a property of the workpiece by a Operator input by means of an input device and / or by means of an image recognition device and / or by means of a preferably non-contact

Sensor device is detected.

The resulting from the first editing process

Quality feature can be at least one of the following group: optical quality of edit

Workpiece surface; Roughness of the machined workpiece surfaces; optical quality of a workpiece surface adjacent to the machined workpiece surface; optical quality one through the machined workpiece surface and an adjacent one

Workpiece surface formed edge; Accuracy of the position of the machined workpiece surface. The "optical quality" can, for example, by an operator in the context of a

Visual inspection can be determined and then by the operator one of several predetermined

Quality values are assigned, for example, in the simplest case, the two predetermined quality values "good" and "not good". But are also possible finer

Gradations, for example in the form of grades or points.

It is also possible that several quality features are detected, and that from these, for example, according to a predetermined weighting key, a total quality feature is determined, which is then assigned to the record. The optical quality of a

Machined workpiece surface adjacent workpiece surface or an edge formed here, for example, a cutting edge can be quantified for example by the number and size of so-called "outliers." A detected there "ripple" can be a quality criterion his. The roughness of the machined workpiece surface or the edge formed, for example, the cutting edge, by the operator, for example, by

To be scanned with a finger.

Basically conceivable is also with all above

specified quality characteristics that they are detected automatically by sensors or image recognition methods.

It is also proposed that the first

Size characterizing the machining process is at least one of the following group: rotational speed of the tool; Feed rate of the tool; Course of a rotational speed of the tool; Course of a feed rate of the tool; Working position of the tool with respect to the workpiece to be machined;

Working position of the workpiece to be machined;

Processing task; Height one at the first

Machining process machined workpiece or

Workpiece stack. These quantities can be very easily detected by means of suitable sensors or very easily determined on the basis of predetermined control signals, production data and / or a machining program for the workpiece. A rotational speed of the tool and a feed rate of the tool are also important parameters, if not the

most important parameters to look out for later

Machining operations to achieve quality, machine performance and / or performance

Tool life optimum processing result

Influence can be taken. One recognizes otherwise In this enumeration, in the context of the present invention, the singular "size" is both a single such quantity and a plurality

may include different sizes. The

Singular was chosen only because of the

reduce linguistic complexity. This also applies to the following exemplary listings of other types of sizes.

The variable characterizing a property of the tool may be at least one of the following group: previous operating time of the tool; Type of tool; Manufacturer of the tool; Vibration behavior of the

tool; Course of a vibration behavior of the

tool; Tool geometry; Number of cutting teeth.

These sizes can usually be determined in a simple way. In particular from the previous one

Operating time of the tool and its combination with a quality feature achieved during a machining operation can be used to predict when a tool needs to be replaced in order to achieve a qualitatively acceptable work result. It should be noted at this point that the term

"Operating time" of the tool is to be understood in a very general manner and by this not only a real time can be understood, but also, for example, a zurückgelegter processing path (in a saw so a laid cutting path) or a total machining distance the lifetime of a tool can be optimally utilized without producing qualitatively insufficient work results.

Furthermore, it is proposed that the variable characterizing a property of the workpiece is at least one of the following group: material of the workpiece; Thickness of the workpiece; Dimensions of the workpiece; Type of

Workpiece; Workpiece ID. Again, these sizes are very easy to determine and can have a significant impact on the quality of the machining process.

As mentioned above, the

According to the invention, the methods according to the invention can also be used in such a way that from the stored data records a

expected remaining operating time of the tool is determined and / or in terms of machining quality for subsequent processing optimal process parameters are determined. In this way, the tool used is optimally utilized, whereby the operating costs of the machine tool can be reduced. The remaining operating time of the tool can be determined, for example, by the total operating time, the materials processed

(eg hard or soft, possibly again specific material properties such as density, composition,

Structure, type of coating, possibly also

summarized by an identification number of the

Materials), a machining section of the tool,

For example, a cutting path of a cutting edge (in a saw so for example, the sum of all sectional arcs of a tooth, the tooth feed, a package height and a saw blade is supernatant dependent), the maximum

Operating time and other and / or other relevant

Parameters are fed into an empirical algorithm or in a multi-dimensional map.

As already mentioned, the invention also includes a plurality of machine tools

("Processing system") comprising a first one

Machine tool and a second machine tool. It comprises a control and regulating device with a

Processor and a memory, which is designed for carrying out a method of the type described above. In such a machine tool, the above in

Related to the advantages listed in the proceedings.

A development for this purpose is characterized in that in the second machine tool an input device is present, with an operator a value for a quality feature, which from a through the first

Machine tool performed machining operation on the workpiece results, can enter, the

Input device is connected to the control and regulating device. As a result, the operation of the plurality of machine tools is facilitated. Alternatively, it is possible that the quality feature on the second

Machine tool also detected automatically by means of one or more corresponding sensors (for example, photography by means of CCD sensor, non-contact scanning by laser, mechanical scanning by feeler, etc.) can be, whereby the clock speed can be significantly increased.

In the same direction is that development, according to which the input device comprises at least one key, the actuation of the control and regulating device is communicated a certain value of the quality feature.

Also in the same direction is that training, according to which the input device comprises a microphone with which the operator can enter a value, and / or a wireless input device, preferably with a

Evaluation unit, in particular a mobile phone, and / or a keyboard and / or a camera comprises.

Hereinafter, an embodiment of the invention will be explained with reference to the accompanying drawings. In the drawing show:

Figure la is a plan view of a first embodiment of a first machine tool in the form of a plate processing plant and a second machine tool in the form of a

Edge processing plant;

Figure lb is a plan view of a second embodiment of a first machine tool in the form of a plate processing plant and a second machine tool in the form of a

Edge processing plant; Figure 2 is a front view of a saw carriage of the plate processing plant of Figure la or lb;

Figure 3 is a top view of the saw carriage of

Figure 2; and

FIG. 4 shows a flow chart of a method for operating the machine tool of FIG. 1a or 1b.

In FIG. 1 a, a first machine tool in the form of a plate processing installation as a whole bears the reference numeral 10. In the present case, it is designed as a panel sizing saw with the large-format plate-shaped workpieces 12 or

Workpiece stack (initial workpieces) by first

Machining operations in the form of sawing operations in smaller workpieces 14 can be divided. In other

Embodiments, the plate processing plant is not as Plattenaufteilsäge but as a milling device and / or as a drilling device for editing plate-shaped

Workpieces formed. Such systems are also referred to as "nesting systems." In addition, any combination of the mentioned types of

Plate processing equipment possible. In principle, however, completely different types of machine tools are also conceivable, for example generally drilling units or CNC milling units.

The panel sizing saw 10 comprises a feed table 16, which is usually designed as a roller table. To the Feed table 16 is followed by a machine table 18, and to these again connects to a discharge table 20, which consists in the exemplary embodiment shown of four separate segments (without reference numerals). The machine table 18 and the removal table 20 are preferably designed as air cushion tables.

In the machine table 18 is a through a

dash-dotted line 22 indicated sawing gap available. Below this, a saw carriage 24 is arranged, which can be moved according to a double arrow 26.

Above the machine table 18, a pressure bar 28 is arranged. This can be moved perpendicular to the plane of the figure la. In the region of the feed table 16, a program pusher 30 is arranged, which can be moved in accordance with a double arrow 32. In turn, several collets 34 are fastened to the program pusher 30, of which only one is provided with a reference numeral for reasons of clarity in FIG. 1a.

To the panel sizing 10 also includes a

Operator terminal 36, which in the present case comprises a keyboard 38 and a screen 40, and a control and

Control device 42, which is indicated only symbolically by a square. The control and regulating device 42 controls and regulates the operation of the panel sizing saw 10. For this purpose, it receives signals from various sensor devices, including the symbolically drawn sensor devices 44, 46, 47 and 48, which may in each case comprise a plurality of individual sensors again. To be controlled by the Control and regulating device in particular the

Program slider 30, the collets 34, the saw carriage 24 with the saws thereon and the pressure bar 28th

The control and regulating device 42 has inter alia a processor 50 and a memory 52. The control and regulating device 42 may be, for example, a conventional PC. In the memory 52 is

Software stored, which for the execution of

programmed and designed different methods. One through an appropriate software program

The evaluation device formed, which will be referred to below, is identified by the reference numeral 54.

The saw carriage 24 and parts of the machine table 28 are shown in more detail in Figures 2 and 3. The saw carriage 24 comprises a plate-shaped

Tool holding section 56, which by means of a not

shown drive on rails 58 which are fixed to a support structure (not shown) of the machine table 18, according to the double arrow 26 is movable. The tool holding portion 56 carries two rotary tools in the form of a main saw blade 60 and a

Scoring saw blade 62. They are movable in the vertical direction. The two drives for the main saw blade 60 and the scoring saw blade 62 carry the reference numerals 64 and 66 in FIG. 3. The two drives 64 and 66 are likewise controlled by the control and regulating device 42 in such a way that that they rotate at a very specific rotational speed.

In a normal operation, the workpiece stack 12 is gripped at a rear end in the feed direction of the collets 34 of the program pusher 30 and by a

Movement of the program slider 30 successively the

Machine table 18 and the saw carriage 24, where it by a movement of the saw carriage 24 according to the double arrow 26 by a pre-scoring cut by means of the scoring saw blade 62 and a subsequent main section by means of

Hauptägeblatts 60 is divided. During processing by the main saw blade 60 and the scoring saw blade 62, the workpiece stack 12 is pressed by the pressure bar 28 against the machine table 18 and thereby fixed. An operator can remove the divided workpieces 14 at the unloading table 20 or further process there, as will be explained later. Alternatively, it is possible, but not shown, that even a robot can remove the finished workpieces and stack or put on a conveyor belt.

The sensor device 44 is generally used for detecting the value of at least one of the machining process, in the present case the above-described sawing, characterizing size A. This may be a rotational speed of the tool, in the present case the main saw blade 60 and / or the scoring saw blade 62, and / or at a feed rate of the

Saw carriage 24 along the by the double arrow 26th marked direction and / or one at the

Splitting of workpieces traveled path and / or a position of the tools 60 and 62 to the workpiece and / or each other. Also, the size A for the

Sawing relevant machine settings such as pressure of the pressure beam and / or the aligner.

The sensor device 46 is generally used for detecting the value of a characteristic of a property of the tool, in the present case of the main saw blade 60 and / or the scoring saw blade 62 size B. This may be a previous operating time of the main saw blade 60 and / or the scoring saw blade 62nd act. Alternatively or

In addition, the sensor device 46 can also be used to characterize the size B, which characterizes the type of tool.

for example, the main saw blade 60 and the

Scoring saw blade 62 of the diameter, the width, the number of saw teeth, the shape of the saw teeth, the grinding of the saw teeth, etc. are detected. The tool

characterizing size B can also be

Vibration behavior of the main saw blade 60 and / or the scoring saw blade 62 be. One the tool

characterizing size B is also the manufacturer of the tool and the material from which the tool is made.

For this purpose, the tool, so for example the

Main saw blade 60 and the scoring saw blade 62, be printed with a bar code containing one or more of the above information as information. In this case the sensor device 46 would be a bar code reader

which is preferably arranged on the saw carriage 24 or in a tool changing area. For detecting the previous operating time of the main saw blade 60, the sensor device 46 may include an evaluation unit, the operating time since the last tool change

summed up. It is also possible that the number of revolutions and / or the number of sawing operations and / or a cutting path of a cutting edge is understood as the operating time.

The sensor device 47 is generally used to detect the value of a quantity C, which characterizes a property of the workpiece 12 or workpiece 14 to be machined. Such a size C may be, for example, the material of the workpiece 12, 14, a thickness of the workpiece 12, 14, the dimensions of the machined

Workpiece 12 and / or the machined workpiece 14, production data of the workpiece, for example a

Cutting plan and / or a position of the workpiece in

Cutting plan, as well as a kind of the workpiece 12, 14 be. The latter includes, for example, whether the workpiece is provided with a coating. Again, it is possible that this information is contained in a bar code, which is printed either on a label which is glued to the workpiece 12, 14, or directly on the workpiece 12, 14. In such a case, the

Sensor device 47 include a bar code reader, which is arranged for example in the region of the pressure bar 28. Alternatively or additionally, the

Sensor device 47 also an image recognition device, for example in the form of a video camera, with which, for example, the thickness and the dimensions can be detected.

The sensor device 48 is arranged in the region of the segment of the removal table 20 arranged on the far right in FIG. 1a. There is also a second one there

Machine tool 72, the present example as

Edge processing device is formed. With it, an edge of a lying on the unloading table 20 and from the first machine tool 10 in the context of a first

Machining process machined workpiece 74 are processed as part of a second machining operation.

For this purpose, the workpiece 14, which is initially finished by the first machine tool 10 and still lying in the area of the machine table 18, is manually moved by an operator 68 on the right-most segment of FIG

Discharge table 20 to the feed table 71 of the second

Machine tool 72 pushed towards and thus transported, so that it comes to rest in the area of the edge processing device 72. There, this workpiece now carries that

Reference 74.

In the arrangement shown in Figure la is a particularly compact arrangement, since the second

Machine tool 72 is arranged directly on the right-hand segment of the discharge table 20. As shown schematically in FIG. 1b, the second

Machine tool 72 also be a stand-alone freestanding machine, which has its own support table 75, which is possibly connected via a transport device (arrow 77) with the removal table 20 of the first machine tool 10.

The sensor device 48 is generally used to detect one of the first processing operation on the

machined workpiece 74 resulting quality feature D. This may be, for example, an optical quality of a machined workpiece surface. In the present case, the machined workpiece surface is a cut surface produced by the sawing process by means of the main saw blade 60. Alternatively or additionally, such a quality feature D is a roughness of a machined

Workpiece surface, or the accuracy of the position of the

machined workpiece surface, in this case the

Accuracy of the position of the produced cut surface, or in other words: the accuracy of the actual

Dimensions of the machined workpiece 74, such as the lengths of the sides formed by the machining and the resulting angle.

Alternatively or additionally comes as a quality feature D also an optical quality of a workpiece surface in question, which is adjacent to the machined workpiece surface. This adjacent workpiece surface can, for example, immediately adjoin a cutting edge. If it is a coated workpiece, outliers, for example, can develop there, ie damage to the coating directly at the cutting edge. For example, the number of such outliers per unit length is one Of quality. As a sensor device 48, for example, an image recognition device in the form of a video camera comes into question. It is also possible, alternatively or additionally, the use of for example

Ultrasonic sensors or other non-contact

working sensor devices.

It can be seen that the value of the quality feature D, which qualitatively evaluates the result of the first processing operation, is only detected when that of the first

Machine tool 10 was machined by the first machining operation workpiece was moved to the second machine tool 72, ie from the process flow of the first

Machine tool 10 was sorted out. However, the value of the quality feature D is still detected by the second machine tool 72 before the start of the second processing operation.

The values of the above-mentioned variables A, B, C and D can also be entered manually by the operator 68 by means of the keyboard 38, which thus far a

Input device 70a forms. This applies in particular to the quality feature D mentioned above as the last, which results from the first machining operation on the machined workpiece 14 or 74. This quality feature D can be detected, for example, by the operator 68 in the case of the workpiece 74 lying on the removal table 20 in the region of the second machine tool 72 by means of a visual inspection. After this acquisition can then the

Operator 68 a value for the corresponding Enter quality feature D using the keyboard 38. In the simplest case, this quality feature D can assume two values, for example "good" and "not good". In other, more complex cases, quality feature D may take more than two values. For example, gradations in the form of grades or points are possible. It is also possible that several quality features Dl, D2, D3, ... are detected, and from these, for example, after one

given weighting by the

Evaluation device 54 of the control and regulating device 42 a total quality feature D is determined.

The machine tool 10 furthermore has a further input device 70b on the right-most segment of the removal table 20 (or in the case of FIG

Embodiment of Figure lb on the support table 75), and there directly in the region of the second machine tool 72 in the form of the edge processing device with which the

Operator can enter a value for the quality feature D manually. This input device 70b is also connected to the control and regulating device 42.

In the present case, the input device 70b simply consists of a key (not shown separately) in which

Actuation of the control and regulating device 42 a

certain value of the quality feature D is communicated, for example, the value "not good" (thus, upon actuation of the input device 70b informed that the just lying in the second machine tool 72 workpiece 74 is to be regarded as a committee). Furthermore, the input device alternatively or additionally comprises a microphone, with which the operator can input a value for the quality feature, and / or a wireless and portable input device, in particular a mobile telephone, and / or a camera. Overall, it can be seen from the above list that the sensor devices 44, 46, 47 and 48 may each include a plurality or even a plurality of individual sensors, which are not shown in the drawing. By way of example, such a portable input device 70c is shown symbolically in FIG. This could also be some of the above sensor devices 44, 46,47 and 48 or

Interfaces for these included.

The detected by the sensor means 44, 46, 47 and 48 sizes A, B and C, or by means of the keyboard 38 or the input device 70b or the

Input means 70c input values D of the sizes or input quality characteristics are used to a record E for each past first processing operation in the control and regulating device 42

("Process data record") and store it in the memory 52, which stores the value of the quality feature D detected by the operator 68 or the sensor device 48 with the values of the first processing operation

characterizing size A (sensor device 44), the size of the characterizing feature of the tool of the first machine tool 10 (sensor device 46) and the property of the first machine tool 10 processed by the first machining operation and second machine tool 72 transported workpiece 74 (sensor device 47) characterizing size C.

connected .

In the present case, such a data set E thus consists of at least four individual values of the sizes A, B, C and D, but possibly also of more than four values.

In principle, however, it is also conceivable that such a

Record E includes only two values, wherein a value for the resulting from the first machining operation on the machined workpiece 74 quality feature D and a value for the first machining operation

characterizing size A in each case part of

Record are.

After a plurality n of processing operations are thus in the memory 52, a plurality n of records

El, E2, E3, ..., En before, where:

El: Al, Bl, CI, Dl

E2: A2, B2, C2, D2

En: An, Bn, Cn, Dn

The method generally described above will now be described again concretely with reference to FIG

Functional diagram shows explained.

A function block 76 symbolizes a production planning in which, based on a specific order, the number the parts to be produced with their respective and sometimes different dimensions and the material from which parts are to be produced, is given. Thereafter, a function block 78 symbolizes itself from the

Production Planning 76 resulting from a starting workpiece (reference numeral 12 in Figure la and lb) a preliminary cutting plan for

Division of the starting workpiece 12 defined by the above-mentioned first machining operations. Furthermore, by this production order, the number of

stacked and so far to be split simultaneously

Output workpieces 12 defined, resulting in a height of the intended for splitting stack of starting workpieces 12. The production order also defines the material to be used and - this will still play a role - a desired quality (target quality feature) on the machined workpiece (reference numerals 14 and 74 in Figure la and lb), ie a target value for the above-mentioned size D.

The corresponding data of the production order 78 are then to the first machine tool 10, so the

Panel Saw, transmitted, specifically to the control and regulating device 42. There is in a

Function block 80 "Configuration saw" the preliminary

Cutting plan optimized by means of a cutting plan optimization according to one or more specified criteria,

for example, in terms of generating as little waste as possible. It then results in a final

Cutting plan. Also, from manufacturing job 78 to saw 80 configuration, the data on the stack height (height of the stack of workpieces to be split) and the material and quality desired are transferred. In the same functional block 80, data concerning the tools, that is to say the main saw blade 60 and the scoring saw blade 62, of the first machine tool 10 are also provided. These include one or more of the above-mentioned in detail "a characteristic of the tool characterizing quantities B", in particular a current tool state.

Some of the configuration for the first

Machine tool 10 required in block 80 process parameters are automatically detected by the sensor devices 44-47, others are in turn entered by the operator 68. In a still belonging to the configuration 80 of the first machine tool 10 function block 82, the process parameters entered by the operator 68 are checked and adjusted if necessary. To do this

Used process parameters provided by a process model (function block 84).

Such a process model 84 may be

For example, an algorithm, the empirically derived relationships between process parameters

maps. These process parameters include

for example, the one mentioned above, from the first

Machining process on the workpiece resulting Quality feature D, the size A which characterizes the first machining operation (including, for example, the machining task), the size B characterizing a property of the tool 60, 62 (for example type of tool, tool condition), and the one

Property of the workpiece 14 characterizing size C (for example, the material). Also belongs to the

Process parameters, the definition of that size or those sizes, which in the upcoming first

Machining process should be optimal

(Optimization variables). In this way, it is possible for the process model 84 to give the functional block 82 those

Provides process parameters where the selected optimization size (s)

Optimization variables is optimal or are.

Alternatively to the function block 82, the

Process parameters in a function block 86 may also simply be provided in their entirety, without being previously input by the operator, by the process model 84 or a process database 88 upstream of the process model 84. This process database 86 will be discussed in detail below.

The configuration 80 of the first machine tool 10 is followed by a function block 90, which represents the first machining operation in the first machine tool 10, in this case the division of the starting workpiece 12 into divided workpieces 14. Subsequently, in a function block 92, an identification of the edited through the first editing process

Workpieces (reference numeral 14 in Figure la and lb). For example, one in FIG. 1a and 1b is not

drawn labeling used, which a

Adhesive label, on which a workpiece 14 uniquely identifying feature (identifier), such as a bar code, is applied to the workpiece 14

glued. It is possible that the identification identifies not only the workpiece 14 as such, but also the specific first machining operation (for example by date and time) with which the workpiece 14 was produced. Alternatively, it is also possible that a linkage of the identifier of the workpiece 14 with the specific first machining operation, by which the workpiece 14 has been produced, is produced, for example, in the process database 88 mentioned above.

In a function block 94, a process data record is created (corresponding to the above-mentioned data record E), which for a specific first machining operation or a specific machined workpiece 14

Process data represents, so for example, the actually used material of the workpiece 14, the actual tool data, the actual

Tool state, the above-mentioned identifier of the workpiece 14, and possibly further of the above-mentioned process parameters. In a function block 96, a feedback of the created process data record takes place in the direction of the process database 88 mentioned above. A functional block 98 represents the transport of the workpiece 14 from the first machine tool 10 to the second machine tool 72, in the present case as an example to the edge processing device. By the

Function block 98 will therefore be the first at

Machine table 18 lying workpiece 14 to the then lying in the region of the second machine tool 72 workpiece 74th

In the area of the second machine tool 72 is a not shown sensor, for example a

Barcode reader with which the above applied in the function block 92 on the workpiece 74 label read, the workpiece 74 so based on the example on a

Adhesive label existing identifier is identified. Alternatively, the operator 68 could the

Recognize identification or manually read with a device and then enter manually on the keyboard 38. All this is represented by a function block 100.

Now, a particularly important step, which is represented by the function block 102, takes place: it now becomes the value of that size, the one from the first

Machining process on the workpiece 74 resulting quality feature characterized detected. Thus, an actual quality of the workpiece 74 obtained by the first machining operation is determined. As has already been explained several times, this can be done by an inspection by the operator 68, which is the result of For example, assessment then enters at the input device 70b or at one of the other input devices 70a or 70c. Alternatively or additionally, however, the sensor device 48, which is arranged in the second machine tool 72, can also be used for determining the actual quality. Alternatively, the existing sensor technology of the second machine tool 72 can also be used for the evaluation of the machining quality of the workpiece, and properties of the workpiece detected during the machining by the second machine tool 72 can be passed to the first machine 10 for further evaluation. The corresponding value was designated above by the letter D.

In a subsequent functional block 104, the

returned value D in the direction of the process database 88. This is located between the

Function block 96 (feedback of the created at or immediately after the first machining operation

Process data record in the direction of the process database) and the function block 88 (process database) a function block 106, which is an extension of the in the function block 96

Confirmed process data record with the from the

Function block 104 confirmed quality feature

represents. So it will be created in 94

Process data record by another process data, namely the value determined in the function block 102, which is the

recorded quality, time-delayed added. This completed or completed process data record is then fed into the process database 88. There, as already explained above, process data sets (designated above by the letter E) are stored, which

Link different process variables, for example: sizes that characterize a property of the workpiece (above size C), for example, the type or type of material, if a coating is present, and if so, which coating, the dimensions of the manufactured workpiece 74th (Length, width, height), as well as the identifier of the workpiece; Sizes that one

Property of the tool 60, 62 used, which was used for the first machining operation,

characterize (above size B), for example, a

Tool identifier, a diameter of the tool, a geometry of the tool cutting, a number of

Cutting teeth of the tool, as well as a qualitative

Tool status; Sizes which characterize a machining task, for which purpose, for example, a height of the stack of workpieces to be split belongs (package height), and the type of processing, for example separating cut,

Scratch cut, etc. (above size A); Quantities that characterize the first machining operation, such as a feed rate, a speed, a supernatant of the tool over the workpiece during the first

Machining operation (saw blade projection), etc. (above size A); and a size one from the first

Machining process on the workpiece 74 characterized quality characteristic (above size D),

For example, a roughness, size and number of Edge breakouts, a general optical quality grade, etc.

The process data sets stored in the process database are also used in function block 84, as was also already explained above, to create an algorithm, namely the above-mentioned process model.

Furthermore, the process data records are used in function block 109, possibly even first

Create process model, which is then provided in function block 84, or an existing one

Process model to expand new process parameters.

The value determined in function block 102 of

However, quality feature can be used not only for the formation of a process data set, but also for comparison with a desired or predetermined value of the quality feature, as it results from the production order 78 and the configuration 80 of the first machine tool 10. This desired or predetermined value (desired quality variable) is therefore retrieved in a function block 108 from the function block 80 (configuration of the first machine tool 10) and compared in a function block 110 with the actual quality variable determined or detected in the functional block 102. In a function block 112, if the actual actual quality size is worse than the target quality size, then a notification is issued to the operator 68 that the just-checked

Workpiece 74 is to be considered as scrap and must be produced again. This will be automatic too Reported back to the production planning 76, so that such a part is automatically integrated into the further production planning. It is understood that in the course of processing the

Starting workpiece 10 in the first processing operations an increasing number of process records generated and stored in function block 88 (process database). Due to the increasing number of process data sets, the process model in function block 84 can be used in the course of the first

Refinements are refined and adapted or updated, which results in an ever better match of the desired optimization quantity with the corresponding actual size.

Claims

claims

1. A method for processing workpieces (12, 14, 74), in which an initial workpiece (12) is first processed by means of a first machine tool (first machining operation), then the machined workpiece (14) to a second machine tool (72 ) is transported and then processed by means of the second machine tool (72) (second

Editing process), and a value of a

Size characterizing, determining or detecting a quality feature (D) resulting from the first machining operation on the machined workpiece (14, 74), characterized in that the value of the size corresponding to that from the first machining operation on the machined workpiece (14 , 74) characterizes the resulting quality feature (D) during transport and / or after transport of the product

machined workpiece (74) to the second

Machine tool (72) is detected or detected.

2. The method according to claim 1, characterized in that the value of the size (D) is determined or detected before the start of the second machining operation and / or during the second machining operation.

3. Method according to at least one of the preceding

Claims, characterized in that it further comprises the following steps: a. Determine or capture a value of a size

(A), which characterizes the first machining operation and / or the value of a size

(B) characterizing a property of a tool (60, 62) used for the first machining operation and / or the value of a quantity (C) characterizing a property of the workpiece (14); b. Creating and storing a record (E) in a memory (52), which is preferred

offset the recorded value of the

Quality feature (D) with the value of the size (A), which characterizes the machining operation, and / or the value of the size (B), the one

Property of the tool (60, 62)

characterized and / or the value of the size (C), which characterizes a property of the workpiece (14) linked.

4. The method according to at least one of the preceding

Claims, characterized in that the

Quality feature (D) and / or the value of the size (A) that characterizes the machining process and / or the value of the size (B), which is a property of

Tool characterized and / or the value of the size

(C), which is a property of the workpiece

characterized by an operator (68) input by means of an input device (40) and / or by means of an image recognition device and / or is detected by means of a preferably non-contact sensor device (44, 46, 47, 48).

5. The method according to at least one of the preceding claims, characterized in that the resulting from the first processing operation

Quality feature (D) at least one of the

following group is: optical quality of the work piece surface to be machined; Roughness of the worked

Workpiece surface; optical quality of a

machined workpiece surface adjacent

Workpiece surface; optical quality one through the machined workpiece surface and an adjacent one

Workpiece surface formed edge; Accuracy of the position of the machined workpiece surface.

6. The method according to any one of the preceding claims, characterized in that the first

Size (A) characterizing the machining process is at least one of the following group:

Rotational speed of the tool (60, 62);

Feed rate of the tool (60, 62);

Course of a rotational speed of the tool (60, 62); Course of a feed rate of the

Tool (60, 62); Working position of the tool (60, 62) with respect to the workpiece (12) to be machined; Working position of the workpiece to be machined (12); Processing task; Height of a workpiece stack processed during the first machining operation.

7. The method according to any one of the preceding claims, characterized in that the one characteristic of the tool (60, 62) characterizing size (B) is at least one of the following group:

previous operating time of the tool (60, 62); Type of tool (60, 62); Manufacturer of the tool (60, 62); Vibration behavior of the tool (60, 62); Course of a vibration behavior of the tool (60, 62); Tool geometry; Number of cutting teeth of the

Tool (60, 62).

8. The method according to any one of the preceding claims,

characterized in that the characteristic characterizing a property of the workpiece (12) is at least one of the following group: Material of the

Workpiece (12); Thickness of the workpiece (12);

Dimensions of the workpiece (12); Type of workpiece (12); Production data of the workpiece (12),

For example, a cutting plan and / or a position of the workpiece (12) in the cutting plan, workpiece identifier.

9. The method according to at least one of claims 3-8,

characterized in that an estimated remaining operating time of the tool (60, 62) is determined from the stored data records (E) and / or optimal process parameters are determined with respect to the processing quality for subsequent processing.

10. processing system (10, 72) comprising a first

Machine tool (10) and a second machine tool (72), characterized in that the

Processing system (10, 72) a control and

Control device (22) comprising a processor (50) and a memory (52), which for carrying out a method according to one of the preceding

Claims is formed.

11. Processing system (10, 72) according to claim 10, characterized in that it comprises a detection device (70b, 70c), which has a value for a

Quality feature (D), which from a by the first machine tool (10) performed

Machining operation on the workpiece (14, 74)

results, recorded.

12. Processing system (10, 72) according to claim 11, characterized in that the detection device comprises an input device (70b, 70c) arranged at the second machine tool (72), with which an operator (68) has a value for a quality feature (D). , which is one of the first

Machine tool (10) performed

Machining operation on the workpiece (14, 74)

results, can enter, with the

Input device (70b, 70c) is connected to the control and regulating device (42).

13. processing system (10, 72) according to claim 12, characterized in that the input device (70b, 70c) At least one key comprises, upon actuation of the control and regulating device (22) a certain value of the quality feature (D) is communicated.

14. processing system (10, 72) according to at least one of claims 12-13, that the input device a

Microphone, with which the operator can enter a value, and / or a wireless input device (70c), preferably with an evaluation unit, in particular a mobile phone, and / or a keyboard and / or a camera comprises.

15. Processing system according to one of claims 11-14, characterized in that the detection device comprises a sensor device for automatic detection of the value of the quality feature (D).