Workpiece machining table

Abstract

A workpiece machining table is described that includes a hollow mounting beam (144), a workpiece machining tool (149) on the mounting beam, and a positioning arm (147) movably mounted within the hollow mounting beam (144) and including a workpiece stop (148) at a distal end. The workpiece machining table (140) further comprises a drive unit (143) comprising a displacement device (170) for moving the positioning arm (147), a length control unit (171) for controlling the displacement device, where the length control unit comprises a length gauge (172) for measuring a length L measurement from the workpiece stop (148) to the workpiece machining tool (149). The length control unit also includes a wireless communication unit (178) to receive information about a desired length L workpiece from a user control unit (152). The length control unit positions the workpiece stop (148) at a desired length L workpiece from the workpiece machining tool (149) by moving the positioning arm (147) until L measurement = L workpiece such that the workpiece can be machined at the desired length L workpiece from the first end of the workpiece.

Description

Technical Field

[0001] The invention relates to a workpiece machining table and more precisely to an automatically adjustable positioning arm in a mounting beam in the workpiece machining table, a workpiece machining system comprising the workpiece machining table and a method for positioning a workpiece stop on the positioning arm relative to a workpiece machining tool. Background Art

[0002] In the construction industry and other fields where measurements are required for cutting, milling or drilling, precise positioning of materials and workpieces is required before processing. For example, a carpenter working with wood will need to accurately cut studs, panels, floor parquet, window moldings and door moldings, etc. By using a system that automatically sets the workpiece stop in the correct position relative to the tool processing the workpiece, faster and more accurate processing is achieved. For example, when cutting a sheet with a miter saw, faster cutting and fewer wrong cuts will be achieved. This principle may be referred to as "automatic linear positioning" in a device or tool. It is abbreviated as ALP in the following text.

[0003] There are several solutions to achieve linear positioning of material and workpiece. There are advanced solutions within the industry that automatically move the workpiece to the correct position and then perform operations such as cutting, milling, drilling, etc. The finished workpiece is then removed from the machine. In addition, there are more manual principles for positioning the workpiece before machining. One principle is that a material stop positions itself at the correct distance from the tool and the operator then manually places the workpiece against this stop.

[0004] By using the ALP together with machining tools, for example in cutting, milling and drilling, faster machining processes and better precision can be achieved. This solution is used in several handicraft fields. What often hinders the use and investment in this solution is that it usually involves large, heavy and expensive machines and supporting equipment. Systems and technologies are needed to make the ALP as light, compact and affordable as possible. The system should be easy to transport and easy to put into use at the work site. For example, the size should be adapted to the loading length of an ordinary vehicle.

[0005] There are manual workbenches with a movable support for the workpiece on the market. A typical example of such a workbench can be found on the homepage of Toolstation: https: / / www.toolstation.com / einhell-mitre-saw-stand / p76447. However, no lightweight workbench is provided with an ALP, and the very dusty environment associated with workpiece machining tools makes it difficult to produce a portable workbench with an ALP that is both sturdy and lightweight.

[0006] It is an object of the present invention to provide a workpiece processing table comprising an ALP which is compact when transported and can be easily set up at a new workplace.

[0007] Another object of the invention is to provide a workpiece processing table which is easily adaptable to different tools and to the size of the workpiece. Summary of the invention

[0008] In one aspect of the present invention, a movable and detachable workpiece processing table is described. The workpiece processing table includes a hollow mounting beam for mounting equipment and a workpiece processing tool releasably mounted on the mounting beam. The workpiece processing table also includes a positioning arm, which is movably mounted in the hollow mounting beam in a longitudinal direction, and the positioning arm includes a workpiece stopper at the end away from the workpiece processing tool, and the workpiece processing table also includes a driving unit mounted on the mounting beam. The driving unit includes a shifting device configured to move the positioning arm to a desired position and a length control unit for controlling the shifting device, wherein the length control unit includes a device configured to measure a length L from the workpiece stopper to a predetermined surface of the workpiece processing tool. 测量 The length control unit further comprises a wireless communication unit configured to receive at least information about a desired length L from the first end of the workpiece to the machining position on the workpiece from the user control unit. 工件 The length control unit is also configured to move the positioning arm until L 测量 =L 工件 , position the workpiece stopper of the positioning arm at the desired length L from the workpiece processing tool 工件 The position of the workpiece is such that when the workpiece abuts the workpiece stop parallel to the centerline S, the desired length L from the first end of the workpiece can be 工件 Processing workpiece.

[0009] The workpiece processing tool may be a circular saw, a miter saw, a drill, a milling machine, a cutter, an angle grinder, a stone saw, a laser spray gun, or any other tool that can be easily operated by a user on the movable and removable workpiece processing table.

[0010] In one embodiment of the workpiece processing table, the displacement means comprises a pinion or drive gear in the drive unit which engages with a rack on the positioning arm. The rack may be, for example, a row of milled teeth or cutouts in the positioning arm or a row of teeth protruding from the positioning arm.

[0011] In one embodiment of the workpiece processing table, the displacement device comprises a drive wheel in the drive unit, which drive wheel interacts with a drive surface on the positioning arm.

[0012] In a further embodiment of the workpiece processing station, the length meter unit comprises a rotary encoder connected to the drive gear.

[0013] In one embodiment of the workpiece processing station, the length gauge includes an optical sensor attached to a mounting beam that reads an absolute length indication attached to the mounting beam.

[0014] In another embodiment of the workpiece processing table, the positioning arm includes a steel U-profile with an opening facing downward and a plastic material U-profile with an opening facing upward, and the plastic material U-profile is assembled into the steel U-profile, wherein the rack is integrated into the downward facing part of the plastic material U-profile.

[0015] In yet another embodiment of the workpiece processing table, the drive gear in the drive unit is made of plastic material.

[0016] In yet another embodiment of the workpiece processing table, the drive unit is mounted below the mounting beam.

[0017] In a further embodiment of the workpiece processing station, the mounting beam comprises an upper surface where both sides of the workpiece stop guide rail are completely covered to prevent material residues and impurities from entering the displacement device and the positioning arm.

[0018] In a further embodiment of the workpiece processing table, the positioning arm is rollably supported in the mounting beam.

[0019] In another embodiment of the workpiece processing platform, the workpiece processing platform comprises an extension portion of the positioning arm, the extension portion is connected with the positioning arm through an extension member, and the extension member is assembled in the extension portion and the positioning arm and fixed by a screw member.

[0020] In a further embodiment of the workpiece processing station, the drive unit comprises an electric motor. The electric motor can be powered by a battery or a local power grid.

[0021] In a further embodiment of the workpiece processing table, the drive unit comprises a drive belt between the electric motor and the gear drive.

[0022] In another aspect of the invention, a workpiece machining system is described, comprising a workpiece machining station as described above and comprising a user control unit configured to send information about a desired length for workpiece machining to a wireless communication unit in a length control unit.

[0023] In an embodiment of the workpiece machining system in which the length gauge is a rotary encoder, the workpiece machining system comprises a calibration unit configured to determine a distance between the workpiece stop and a predetermined surface on the workpiece machining tool and to send the determined distance to a communication unit of the length control unit.

[0024] In another aspect of the present invention, a method for using a workpiece processing system as described above is described. The method comprises the following steps:

[0025] a. Use the communication unit in the length control unit to receive the desired length L from the user control unit 工件 .

[0026] b. Use a length gauge to measure the length L from the workpiece stopper to the predetermined surface of the workpiece processing tool 测量 ;

[0027] c. If the length control unit obtains L 测量 With L 工件 If different results are obtained, use the shifting device to move the positioning arm until L 测量 =L 工件 . BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to improve the understanding of the invention, some drawings have been attached, in which the same features have the same reference numerals in different drawings.

[0029] Figure 1 An embodiment of a workpiece processing station is shown.

[0030] Figure 2 An embodiment of a mounting beam is shown.

[0031] Figure 3 An embodiment of an extendable positioning arm is shown.

[0032] Figures 4a to 4c An advantageous embodiment of a positioning arm comprising a U-shaped profile is shown.

[0033] Figure 5a An embodiment of a drive unit mounted on a mounting beam is shown.

[0034] Figure 5b Shows Figure 5a The actual drive unit.

[0035] Figure 5c An embodiment of a drive unit having a rotary encoder is shown.

[0036] Figure 6 An embodiment of a length indication on a positioning arm is shown.

[0037] Figure 7 Shows Figure 6 A positioning arm with a workpiece stop attached thereto.

[0038] Figure 8 An optical reader is shown reading the length indication.

[0039] Fig. 9 Shows Figures 6 to 8 A positioning arm is driven by a driving wheel.

[0040] Fig.10 A capacitive reader for reading a capacitive length indication is shown.

[0041] Fig.11 A handheld unit including a length measurement function is shown.

[0042] Fig.12 A schematic diagram of a drive unit is shown.

[0043] Fig.13 A schematic diagram showing an embodiment of a length control unit is shown.

[0044] Fig.14 A process for using a workpiece machining system is shown.

[0045] Fig.15 The center lines S and L of the mounting beams are shown 测量 and L 工件 . DETAILED DESCRIPTION

[0046] The present invention describes a method such as Figure 1 A movable and removable / foldable workpiece processing table 140 is shown. In most cases, the workpiece processing table 140 will be a saw table, but other ways of processing the workpiece are also contemplated, such as drilling, scribing, planing, machining or milling. The workpiece processing table 140 includes a hollow mounting beam 144 for mounting the device. The mounting beam 144 will typically have a hollow profile made of one or more metals including aluminum or iron, but other materials such as plastics or composite materials are also contemplated. Figure 1 Two support legs 141 are shown which support each end of the mounting beam at a suitable working height. Outboard and inboard or end are used to describe positioning along the centerline S of the mounting beam, with the outboard being away from the workpiece machining tool and the inboard being the opposite.

[0047] See also Figure 1 ,exist Figure 2 The mounting beam 144 is shown with a workpiece processing tool 149 mounted thereon. The workpiece processing tool is preferably releasably mounted to the mounting beam. To achieve good stability, the mounting beam typically includes a protruding mounting structure 154 that fits into a corresponding structure in the fastener for the processing tool. Figure 1 As shown, the positioning arm 147 is mounted in the mounting beam 144, which can move in the hollow mounting beam 144 in the direction along the center line S, and includes a workpiece stop 148 at the end away from the workpiece processing tool 149. The center line S is Figure 1 and Fig.15The workpiece stop 148, workpiece machining tool 149 and positioning arm 147 are placed along the centerline S, and the workpiece machining tool will generally perform its machining in the space vertically above the centerline S above the upper surface 180 of the mounting beam.

[0048] The workpiece processing table 140 includes a drive unit 143 mounted on a mounting beam 144. Figure 5a and Figure 5b As shown, the drive unit is preferably mounted below the mounting beam by means of a first locking structure 266 and a second locking structure 267 and an associated locking clamp 268 on the drive unit, which engages in a first fastening track 264 and a second fastening track 265 on the mounting beam 144. The drive unit includes a shifting device 170 for moving the workpiece stop 148 to the positioning arm 147 to move to a desired position relative to the workpiece processing tool 149. The drive unit includes a length controller unit 171, which includes a wireless communication unit 178 and a length gauge 172. The physical form of the drive unit 143 can be seen at Figure 1 and Figure 5, and as a schematic diagram in Fig.12 The length gauge is configured to measure the length L from the workpiece stopper 148 to the workpiece processing tool 149. 测量 ,like Fig.15 More precisely, the length is measured from the contact surface 150, see Fig. 9 When the workpiece is in the working position, the workpiece is placed against the contact surface on the selected / predetermined surface of the workpiece stop 148 and the workpiece processing tool. The above-mentioned predetermined surface can be, for example, the side surface of the saw blade facing the workpiece stop 148.

[0049] The wireless communication unit 178 of the length control unit 171 is configured to receive at least information about a desired length L from the first end of the workpiece to the processing position on the workpiece from the user control unit 152. 工件 The length control unit 171 is also configured to move the positioning arm 147 until L 测量 =L 工件 , the workpiece stopper 48 is positioned to the positioning arm 147 and the distance from the workpiece processing tool 149 is L 工件 Thus, the workpiece can be machined from the first end of the workpiece to the desired length L when the first end rests against the workpiece stop. 工件 The actual machining of the object is performed by a user operating a tool for machining the workpiece.

[0050] In one embodiment of the invention, the displacement device 170 comprises a gear drive 146 in the drive unit, which interacts with a rack 258 mounted on the positioning arm 147, and wherein the rack 258 is driven by the gear 146 in the drive unit. Preferably, the drive unit is fixedly mounted below the mounting beam 144, wherein the gear protrudes upward from the drive unit, and the rack 258 is mounted on the underside of the positioning arm 147, such as Figure 5a The mounting beam preferably includes a hole 250 through which the drive gear can act on the rack. In this embodiment, in which the displacement device 170 includes a gear drive 146 and a rack, the length meter 172 can advantageously include a rotary encoder 179 mounted on the gear drive 146, such as Figure 5c This is an inexpensive solution that provides good accuracy as long as the clamp between the gear drive and the rack does not slip.

[0051] In one embodiment, the drive unit 143 includes an electric motor 175 that provides the necessary power to drive the displacement device 170 . Figure 5a and Figure 5b A drive unit is shown, wherein the power source is a battery 262. The drive unit may also be connected to an electrical grid. It is also conceivable that the shifting device is driven by a pneumatic motor. In an embodiment of the invention, wherein the shifting device 170 comprises a toothed drive 146 acting on a row of teeth, and the length meter unit is a rotary encoder 179, it is advantageous that the electric motor 175 is connected to the gear drive 146 via a transmission belt 182. Before the engagement between the gear drive and the rack fails, the engagement of the transmission belt and the connecting member of the transmission belt is configured to be unaffected by the accident of the positioning arm. In this way, after an accidental impact, the rotary encoder 179 will still obtain the correct position of the workpiece stop 148.

[0052] In another embodiment, the displacement device 170 includes a drive surface 173 on the positioning arm 147, which cooperates with a drive wheel 174 in the drive unit, such as Fig. 9 As shown. The friction between the drive surface and the drive wheel enables the positioning arm 147 to move. The drive wheel can be, for example, a rubber wheel, which is pressed against the drive surface with a predetermined force generated by a spring load. In this embodiment, a rotary encoder mounted on the drive wheel is not very advantageous, because if, for example, there are foreign bodies on the drive surface or if the positioning arm is exposed to impacts, the risk of the drive wheel slipping relative to the drive surface 173 will be greater. When there is a risk of slipping between the drive surface and the drive wheel, an absolute measurement of the position of the workpiece stop is more beneficial. There are relatively many such measurement solutions on the market.

[0053] One of these solutions is Figures 6 to 9 In Figure 6An optically readable absolute and binary length indication 177 is shown in FIG. 1 , which is fixed along the length of the positioning arm 147 . Figure 7 A positioning arm 147 with a workpiece stop is shown. Preferably, the relative position between the length indication 177 and the workpiece stop 148 is constant. The position of the workpiece stop can then be read directly. Figure 8 An optical reader 176 is shown which is attached to the mounting beam 144 and continuously reads the length indication 177. The optical reader should be placed close to the workpiece processing tool so that shorter workpiece lengths can also be used. Advantageously, the optical reader 176 can obtain the length indication through the alignment hole 153 in the mounting beam 144, such as Figure 2 and Figure 8 shown. Fig. 9 A drive wheel is shown acting on a drive surface 173 of the positioning arm 147 .

[0054] Fig.10 Another embodiment of the length meter unit 172 is shown. In the case of a capacitive or magnetic property of the length indication 177 that varies with length, a magnetic or capacitive reader 184 is used. It is also conceivable to use a rotary encoder 179 connected to a rotating part in the drive circuit between the motor and the positioning arm 147, for example to make frequent corrections each time one or more marks at a known distance from the workpiece stop 148 are passed.

[0055] In one embodiment of the positioning arm, Figures 4a to 4c As shown, the positioning arm 147 includes a beam of a steel U-shaped profile 256 with an opening facing downward and a beam of a plastic material U-shaped profile 257 with an opening facing upward. The plastic material U-shaped profile fits into the steel U-shaped profile, and a rack 258 is incorporated into the downward facing portion of the plastic material U-shaped profile and is configured to engage with a toothed drive 146 that projects upward from a drive assembly 143 mounted below the mounting beam 144. Figure 4a As shown, the two legs 257' of the plastic U-profile are fitted between the two legs 256' of the steel U-profile so that when the bottom of the plastic U-profile is flush with the ends of the legs 256' of the steel U-profile, the legs 257' of the plastic U-profile rest against the bottom of the steel U-profile 256. Preferably, the gear drive is made of or coated with a plastic product. Plastic to plastic causes little wear.

[0056] Preferably, if Figure 2 As shown, the mounting beam 144 includes an upper surface 180 that completely covers both sides of a workpiece stop recess 181 to prevent material residue from affecting the gear drive and rack located in the cavity of the mounting beam. The workpiece stop recess 181 can be provided with brushes protruding from each side to further prevent impurities or material residue from entering the cavity of the mounting beam 144. Figure 2The advantageous embodiment shown has a first longitudinal cavity 191 and a second longitudinal cavity 192 adjacent to the first longitudinal cavity. The workpiece stop recess 181 extends inwardly toward the workpiece machining tool 149 so that a large portion of the mounting beam has a fully covered upper surface. This provides a good weight-to-strength ratio in the mounting beam 144. Figure 2 In the embodiment of the mounting beam in FIG. 1 , the locating arm 147 is stored in the first longitudinal cavity 191 for operation, and the extension 147 ′ of the locating arm 147 is positioned in the second longitudinal cavity 192 for storage.

[0057] It is also conceivable that the upper surface of the mounting beam is completely uninterrupted without the workpiece stop recess 181. In such an embodiment, when machining short workpieces, the workpiece machining tool must be positioned at the end of the mounting beam 144 facing the workpiece stop 148. When machining longer workpieces, the workpiece machining tool can be positioned at one end of the mounting beam 144 that is farthest from the workpiece stop. The advantage of this design is that less impurities enter the cavity of the mounting beam compared to the design with the workpiece stop recess 181. The disadvantage is that the user must move the workpiece machining tool more frequently. Alternatively, when machining short workpieces, the stop extension 132 can be assembled to a workpiece stop that protrudes above the mounting beam.

[0058] Advantageously, the locating arm 147 may be slidably supported in the mounting beam 144. For example, rollers may be fixed on each side of the lower portion of the outer end of the mounting beam, and rollers may be fixed on each side of the upper inner end of the locating arm 147.

[0059] The length of the workpiece processing table 140 is intended to be between 1 meter and 3 meters, but lengths outside this range are also possible. This length gives a weight that can be handled by one person and the possibility of transportation in an ordinary car. Typically, the workpiece to be processed will be a board to be sawn, and then a length of more than 5 meters may be desired. If it is desired to exceed the length that can be reached by the positioning arm, an extension arm 147 'of the positioning arm 147 can be installed. Figure 3 As shown, the extension arm 147' of the positioning arm 147 can be connected together by a link 251, which is assembled inside the extension arm 147' and the positioning arm 147 and fixed by a fastener (such as a screw or a pawl mechanism). In order to achieve stability, an additional bracket, preferably having a roller on top of which the positioning arm can roll, should be positioned at a distance from the workpiece processing table 140 along the center line S so that the extended positioning arm 147 can rest against the bracket and be supported by the bracket.

[0060] exist Figure 3In the embodiment shown, the extension 147' is attached to the locating arm 147 by a connector 251 having two threaded holes 252 that fit into corresponding threaded holes 254 in the locating arm 147 and the extension 147' of the locating arm. The attachment itself is performed by attaching a threaded member 253 in the aforementioned threaded holes 253, 254. The extension 147' is typically attached to the locating arm 147 at the end opposite the workpiece stop.

[0061] The workpiece processing station 140 is part of a workpiece processing system, which includes at least one user control unit 152, which transmits information about the desired workpiece length (L 工件 ) information. Such a user control device will typically be a mobile phone with an application or a Fig.11 The handheld length meter shown has a communication device that can communicate with the communication unit 178 of the length controller unit 171. If the length meter unit 172 of the length controller unit 171 is a relative length meter, such as a rotary encoder 179, the length controller unit must be calibrated at regular intervals. For this purpose, a calibration unit 183 is required, which can measure the length between the inner side of the workpiece stop 148 and the predetermined surface of the workpiece processing tool 143. A handheld length meter with a communication device will be able to be used as a calibration unit 183, which can communicate with the communication unit 178 to implement the length control unit 171. The calibration unit can also be incorporated into the user control unit 152 described above. Other designs of the calibration unit are also conceivable. The calibration unit can, for example, include a laser instrument, for example, located on the end stop, which can be pointed to a predetermined surface on the workpiece processing tool. Alternatively, the calibration unit can include a laser meter mounted on the workpiece processing tool and pointing to the inner side of the workpiece stop.

[0062] Fig.13 A schematic diagram of the length controller unit 171 is shown. In addition to the aforementioned length gauge unit 172 and wireless communication unit 178, the length controller unit will typically include a processor 186, input / output circuits 187 and memory 188 containing instructions for executing the method of using the workpiece processing station 140.

[0063] The method includes Fig.14 Steps shown:

[0064] a. With the help of the communication unit 178 in the length control unit 171, the desired length L is received from the user control unit 152 工件The user control unit 152 is used by the user and may, for example, contain a list of desired targets of the objects to be processed. For example, it may be a list of all measurements of trusses and panels of a building or a part of a building. The user control unit 152 may also be a handheld length meter, wherein the measured length is transmitted to the communication unit 178 of the length controller unit 171.

[0065] b. Use the length gauge unit 172 to measure the length L from the workpiece stopper 148 to the predetermined surface of the workpiece processing tool 149 测量 The predetermined surface may be, for example, the side of a saw blade or a drill facing the workpiece stop.

[0066] c. If the length control unit 171 obtains L 测量 With L 工件 If different results are obtained, the positioning arm 147 is moved using the shifting device 170 until L 测量 =L 工件 .

[0067] Reference again Fig.13 Schematic diagram of the length control unit 171 in. The instructions executable by the processor can be software in the form of a computer program. The computer program can be stored in the memory 188 as shown in the figure, or contained in a carrier, which can convey the computer program to the memory 188 and the processor 186. The carrier can be in any suitable form, including an electrical signal, an optical signal, a radio signal, or a computer-readable storage medium. As used herein, the term "computer-readable medium" can be a universal serial bus (USB) memory, a digital versatile disk (DVD), a blue disc, a software module received as a data stream, a flash memory, a hard disk, a memory card such as a memory stick, a multimedia card (MMC), a secure digital (SD) card, etc. One or more of the above-mentioned embodiments of the computer-readable medium can be provided as one or more computer program products.

[0068] Reference List

[0069] 140 Workpiece Processing Table

[0070] 141 Support Leg

[0071] 142 Workpieces

[0072] 143 Drive Unit

[0073] 144 Installation beam

[0074] 146 Gear drive

[0075] 147 Positioning Arm

[0076] 147' Positioning Arm Extension

[0077] 148 Workpiece stop

[0078] 149 Workpiece processing tools

[0079] 150 Adjoining surface for workpiece stop

[0080] 152 User Control Unit

[0081] 153 Alignment hole

[0082] 154 Component Structure

[0083] 170 Shifting device

[0084] 171 Length controller unit

[0085] 172 Length gauge unit

[0086] 173 Drive Surface

[0087] 174 Drive wheel

[0088] 175 Electric Motor

[0089] 176 Optical Sensor

[0090] 177 Absolute length indication of positioning arm

[0091] 178 Communication Unit

[0092] 179 Rotary encoder

[0093] 180 Upper surface of mounting beam

[0094] 181 Workpiece stop guide

[0095] 182 Transmission belt

[0096] 183 Calibration Unit

[0097] 184 Capacitive Reader

[0098] 185 Magnet

[0099] 186 processors

[0100] 187I / O Circuit

[0101] 188 Memory

[0102] 191 First longitudinal cavity in the mounting beam

[0103] 192 The second longitudinal cavity in the mounting beam

[0104] 250 Hole in mounting beam 144 for shifting device 170

[0105] 251 Connectors

[0106] 252 threaded hole in connecting member 251

[0107] 253 Connecting thread

[0108] 254 Threaded hole in positioning arm

[0109] 256 U-shaped profile made of steel

[0110] 257 U-shaped profile made of plastic

[0111] 258 rack (eg, located on a plastic U-shaped profile 257)

[0112] 262 Batteries

[0113] 264 First Lock Track

[0114] 265 Second Lock Track

[0115] 266 First locking structure

[0116] 267 Second locking structure

Claims

1. A movable and detachable workpiece processing table (140), comprising: A hollow mounting beam (144) for mounting equipment; A workpiece processing tool (149) is releasably mounted on the mounting beam, characterized in that the workpiece processing table further comprises a positioning arm (147), the positioning arm is movably mounted in the hollow mounting beam (144) in the longitudinal direction, and the positioning arm comprises a workpiece stopper (148) at the end away from the workpiece processing tool (149), A driving unit (143) is mounted on the mounting beam (144), and the driving unit comprises: a shifting device (170) configured to move the positioning arm (147) to a desired position; A length control unit (171) is used to control the displacement device, wherein the length control unit comprises: A length gauge (172) configured to measure a length L from the workpiece stopper (148) to a predetermined surface of the workpiece processing tool (149) 测量 ; A wireless communication unit (178) configured to receive from a user control device (152) at least information regarding a desired length L from a first end of a workpiece to a machining location on the workpiece 工件 information, and The length control unit (171) is further configured to move the positioning arm (147) until L 测量 =L 工件 , positioning the workpiece stopper (148) of the positioning arm (147) at a desired length L from the workpiece processing tool (149) 工件 so that when the workpiece abuts against the workpiece stopper (148), the workpiece can be moved at a desired length L from the first end of the workpiece. 工件 Processing the workpiece.

2. The workpiece processing table according to claim 1, wherein: The displacement device (170) comprises a gear drive (146) in the drive unit (171), which engages in a toothed rack (258) on the positioning arm (147).

3. The workpiece processing table according to claim 1, wherein: The displacement device (170) comprises a drive wheel (174) in the drive unit, which interacts with a drive surface (173) on the positioning arm (147).

4. A workpiece processing table according to any one of the preceding claims, wherein: The length meter unit (172) comprises a rotary encoder (179) connected to a toothed drive (146).

5. A workpiece processing table according to any one of the preceding claims, wherein: The length meter unit (172) includes an optical sensor (176) attached to the mounting beam (144) that reads an absolute length indication (177) attached to the mounting beam.

6. The workpiece processing table according to claim 2, wherein: The positioning arm (147) comprises a steel U-profile (256) with its opening facing downwards and a plastic material U-profile (257) with its opening facing upwards, and the plastic material U-profile is assembled into the steel U-profile, and wherein the rack (258) is incorporated into the downwardly facing portion of the plastic material U-profile (257).

7. The workpiece processing table according to claim 6, wherein: The gear drive (146) is made of plastic material.

8. A workpiece processing table according to any one of the preceding claims, wherein: The driving unit (143) is fixedly mounted below the mounting beam (144).

9. A workpiece processing table according to any one of the preceding claims, wherein: The upper surface (180) and both sides of the mounting beam are uninterrupted on both sides of the workpiece stop groove (181) to prevent material residue from entering the displacement device (170) and the positioning arm (147).

10. A workpiece processing table according to any one of the preceding claims, wherein: The positioning arm (147) is rollingly supported in the mounting beam 144.

11. The workpiece processing table according to any one of the preceding claims, further comprising an extension portion (147') of the positioning arm (147), the extension portion being connected to an extension member (251), the extension member being assembled in the extension portion (147') and the positioning arm (147) and fixed by a screw member.

12. A workpiece processing table according to any one of the preceding claims, wherein: The drive unit (143) includes an electric motor.

13. The workpiece processing table according to claim 12, wherein: The drive unit (143) comprises a drive belt between the electric motor and the gear drive.

14. A workpiece machining system comprising a workpiece machining table according to claims 1 to 13 and comprising a user control unit (152) configured to send information about a desired length for machining a workpiece to the wireless communication unit (178).

15. The workpiece processing system according to claim 14, when dependent on claim 4, further comprises a calibration unit (183), which is configured to determine the distance between the workpiece stopper (148) and a predetermined surface on the workpiece processing tool (143), and to send the determined distance to the communication unit of the length control unit.

16. A method for using a workpiece processing system according to claims 14 and 15, comprising the following steps: a. Using the communication unit (178) in the length control unit (171) to receive the desired length L from the user control unit (152) 工件 ; b. Using the length gauge (172) to measure the length L from the workpiece stopper (148) to the predetermined surface of the workpiece processing tool (149) 测量 ; c. Obtain L in the length control unit (171) 测量 Different from L 工件 In the case of the result of L, the positioning arm (147) is moved using the shifting device (170) until L 测量 =L 工件 .

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