Range-extending workbench

Abstract

The invention relates to the technical field of adjustable workpiece supports of machine tools, in particular to a range extending workbench. The range extending workbench comprises a bearing table used for bearing a workpiece and a base used for being fixed to a machine tool, the bearing table is arranged on the base in a sliding mode, an in-place locking mechanism is arranged on the base, and the in-place locking mechanism comprises a locking piece and a driving mechanism driving the locking piece to move up and down. A locking groove is formed in one of the bearing table and the locking piece, a locking part installed in the locking groove is arranged on the other one of the bearing table and the locking piece, the locking groove is provided with a limiting wall used for being in pressing fit with the locking part, and the locking groove extends in the sliding direction of the bearing table so as to avoid the locking part when the bearing table slides. The locking piece has a locking state in which the locking part and the limiting wall are pressed tightly so as to lock and fix the bearing table and the base when the bearing table slides to the set position in the vertical moving stroke of the locking piece, the overall rigidity of the range extending workbench can be improved, vibration is not prone to occurring in the workpiece machining process, and the machining precision is guaranteed advantageously.

Description

Technical Field

[0001] The invention relates to the technical field of adjustable workpiece supports for machine tools, and in particular to an extended-range workbench. Background Art

[0002] Long guide rail base parts are mass-produced by CNC machine tools. Such parts are slender plate-like structures with small width and large length. The travel of the CNC machine tool's worktable in the X direction must meet the length requirement, but the travel requirement for the Y direction corresponding to the width of the part is not high. To meet the processing requirements, the traditional method is to use multiple clamping or large machine tools with a larger worktable movement range. The use of large machine tools will increase production costs, and the use of multiple clamping methods will make the operation process more cumbersome and the processing auxiliary time too long.

[0003] In the prior art, there is a scheme of increasing the range by adding another workbench on the basis of the original workbench of the machine tool, which can save costs while ensuring processing efficiency. For example, a universal range-extending workbench disclosed in the Chinese utility model patent with authorization announcement number CN208246269U includes a base for mounting on the machine tool, a panel for mounting the workpiece, and a sliding assembly arranged between the base and the panel. The base is detachably connected to the existing workbench of the machine tool, and the panel constitutes a new workbench. The sliding assembly includes a plurality of pads arranged on the base, a guide rail installed on the pad and arranged along the longitudinal direction of the base, a telescopic mechanism arranged on the lower surface of the panel, and a positioning block fixed at one end of the longitudinal direction of the base. The panel is installed on the guide rail, and the telescopic front end of the telescopic mechanism is connected to the positioning block. When the telescopic mechanism is extended and shortened to realize the reciprocating sliding of the panel along the guide rail, a first limit block and a second limit block are arranged on the lower surface of the panel, and the first limit block and the second limit block correspond to the positioning block. The spacing between the first limit block and the second limit block is the sliding range of the panel. By driving the panel to slide back and forth relative to the base, the range of motion of the machine tool for processing workpieces can be increased, thereby achieving the effect of extending the range.

[0004] The panel of the above-mentioned extended-range workbench constitutes a bearing platform for bearing the workpiece, and the bearing platform is slidably set on the base. Since the workpiece is very long, the length of the bearing platform also needs to be set very long accordingly. When the bearing platform is in the extreme position, a relatively long part of the bearing platform will be in an overhanging state. At this time, the guide rail on the base must not only bear the positive pressure of the bearing platform, but also the lever force brought by the overhanging part of the bearing platform, which increases the load acting on the guide rail of the base and accelerates the wear of the sliding fit between the bearing platform and the base. After a period of time, a relatively large gap will be formed at the sliding fit between the bearing platform and the base, which is easy to cause vibration during workpiece processing, affecting the processing accuracy, and easily causing fatigue damage to the guide rail, reducing the accuracy and affecting the service life. Summary of the invention

[0005] The object of the present invention is to provide an extended-range workbench to solve the problem that the existing extended-range workbench is prone to vibration during workpiece processing due to a gap between the supporting platform and the base sliding fit, thereby affecting the processing accuracy.

[0006] The technical solution of the range-extending workbench of the present invention is: The invention relates to an extended-range workbench, comprising a bearing platform for bearing a workpiece and a base for fixing to a machine tool. The bearing platform can be slidably arranged on the base, and a locking mechanism is provided on the base. The locking mechanism includes a locking member and a driving mechanism for driving the locking member to move up and down. A locking groove is provided on one of the bearing platform and the locking member, and a locking portion movably inserted into the locking groove is provided on the other. The locking groove is provided with a limiting wall for pressing and fitting with the locking portion. The locking groove extends along the sliding direction of the bearing platform to avoid the locking portion when the bearing platform slides. The locking member has a locking state in its up and down moving stroke, in which the locking portion is pressed against the limiting wall when the bearing platform slides to a set position to lock and fix the bearing platform and the base.

[0007] Beneficial effect: The present invention is an improvement on the extended-range workbench in the prior art, and utilizes an in-place locking mechanism to lock the load-bearing platform with the base when the load-bearing platform slides to a set position. When the load-bearing platform needs to slide, the locking piece is driven upward by the driving mechanism, and the locking portion moves in the locking groove, so that the limiting wall of the locking groove and the locking portion are in a relaxed state. The locking groove avoids the locking portion when the load-bearing platform slides. When the load-bearing platform slides to a set position relative to the base, the locking piece can be driven downward by the driving mechanism to press the locking portion and the limiting wall of the locking groove. The load-bearing platform and the base are locked and fixed by the tensioning action of the driving mechanism, which can improve the overall rigidity of the extended-range workbench, prevent it from vibrating during workpiece processing, and help ensure processing accuracy.

[0008] Furthermore, the locking groove is arranged on the supporting platform, the locking part is arranged on the locking member, the notch of the locking groove faces downward, and the locking groove is provided with limiting walls for cooperating with the locking part on both sides in the groove width direction.

[0009] Furthermore, a thickened convex portion protruding downward is provided on the lower side of the supporting platform, and the locking groove is arranged at the thickened convex portion.

[0010] Furthermore, the locking member has a connecting portion extending out of the locking groove, and the connecting portion is connected to the driving mechanism.

[0011] Furthermore, the length direction of the base is consistent with the sliding direction of the supporting platform, and both ends of the base in the length direction are provided with the in-position locking mechanism.

[0012] Furthermore, more than two slide seats are arranged on the base at intervals along the sliding direction of the bearing platform, and the slide seats are provided with structures for slidingly cooperating with the bearing platform, and the in-position locking mechanism is arranged on one side of the corresponding slide seat along the width direction of the base.

[0013] Furthermore, the in-position locking mechanism is arranged on the outer side of the corresponding slide seat.

[0014] Furthermore, the in-place locking mechanisms are arranged in two rows at intervals along the width direction of the base, and each row is provided with more than two in-place locking mechanisms.

[0015] Furthermore, the driving mechanism is a telescopic cylinder, which includes a cylinder body and a piston rod, the piston rod is connected to a locking piece, the cylinder body is fixed to a base, and the base is provided with an installation cavity for the cylinder body to extend into.

[0016] Furthermore, an electromagnetic suction cup is provided on the supporting platform for fixing the workpiece by magnetic attraction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of an extended-range workbench according to an embodiment of the present invention from a side perspective along its width direction; Figure 2 It is a schematic diagram of a side view of an extended-range workbench along its length direction of an embodiment of the present invention; Figure 3 for Figure 2 A schematic diagram of a locking mechanism in place; Figure 4 A top view of an extended-range workbench according to an embodiment of the present invention; Figure 5 It is a schematic diagram of the connection relationship between the sliding drive mechanism, the base and the bearing platform of the extended-range workbench according to an embodiment of the present invention.

[0018] In the figure: 1. base; 11. slide seat; 2. bearing platform; 20. guide rail; 21. locking groove; 3. sliding drive motor; 31. transmission screw; 32. transmission nut; 4. in-position locking mechanism; 41. locking piece; 42. locking drive mechanism; 5. electromagnetic suction cup. DETAILED DESCRIPTION

[0019] The extended-range workbench of the present invention utilizes an in-position locking mechanism to lock and fix the support platform to the base when the support platform slides to a set position, thereby improving the overall rigidity of the extended-range workbench, making it less likely to vibrate during workpiece processing and helping to ensure processing accuracy.

[0020] Embodiments of the extended range workbench of the present invention: The extended-range workbench includes a bearing platform for bearing workpieces and a base for fixing to a machine tool. The bearing platform can be slidably arranged on the base, and a locking mechanism is provided on the base. The locking mechanism includes a locking piece and a driving mechanism for driving the locking piece to move up and down. A locking groove is provided on one of the bearing platform and the locking piece, and a locking portion movably inserted into the locking groove is provided on the other. The locking groove is provided with a limiting wall for pressing and fitting with the locking portion. The locking groove extends along the sliding direction of the bearing platform to avoid the locking portion when the bearing platform slides. The locking piece has a locking state in its up and down moving stroke for pressing the locking portion and the limiting wall when the bearing platform slides to a set position so as to lock and fix the bearing platform and the base.

[0021] Specifically, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 As shown, the extended-range workbench includes a base 1, a bearing platform 2, and a sliding drive mechanism. The base 1 is provided with a fixed structure for fixing to the sliding part of the original workbench of the machine tool. The bearing platform 2 is used to carry the workpiece. The bearing platform 2 is slidably arranged on the base 1. The sliding drive mechanism is used to drive the bearing platform 2 to slide relative to the base 1. The sliding drive mechanism includes a sliding drive motor 3 and a screw-nut mechanism. The sliding drive motor 3 drives the bearing platform 2 to slide through the screw-nut mechanism.

[0022] The length direction of the extended-range workbench is defined as the front-to-back direction, the width direction is the left-to-right direction, the length direction of the carrier 2 is the front-to-back direction, the carrier 2 is slidably arranged along the front-to-back direction, the length direction of the base 1 is the front-to-back direction, and the length of the base 1 is less than the length of the carrier 2. A guide rail 20 is provided at the bottom of the carrier 2, the guide rail 20 extends along the front-to-back direction, two guide rails 20 are provided, and the two guide rails 20 are arranged at intervals from left to right, and the sliding drive motor 3 and the screw nut mechanism are located between the two guide rails 20 in the left-to-right direction. A slide 11 is provided on the top of the base 1, and the slide 11 is provided in two rows on the left and right. One row of slides 11 corresponds to one guide rail 20, and there are multiple slides 11 in the same row. Each guide rail 20 corresponds to multiple slides 11, and a slide groove adapted to the guide rail 20 is provided on the slide 11. The slide groove constitutes a structure on the slide 11 for sliding cooperation with the guide rail 20 of the supporting platform 2. The slides 11 corresponding to the same guide rail 20 are arranged at intervals in the front-to-back direction, and the slide groove of the slide 11 is used to form a guiding cooperation with the guide rail 20 and limit the guide rail 20 from escaping the slide groove upward.

[0023] The base 1 is provided with an in-place locking mechanism 4, which includes a locking member 41 and a locking drive mechanism 42. The locking drive mechanism 42 is a drive mechanism for driving the locking member 41 to move up and down. A locking groove 21 is provided on the bearing platform 2. The locking member 41 is provided with a locking portion movably inserted into the locking groove 21. The locking groove 21 is provided with a limiting wall for pressing and fitting with the locking portion of the locking member 41. The locking groove 21 extends along the sliding direction of the bearing platform 2 to avoid the locking member 41 when the bearing platform 2 slides. The locking member 41 has a locking state in its up and down moving stroke, in which the locking portion is pressed against the limiting wall when the bearing platform 2 slides to a set position to lock and fix the bearing platform 2 and the base 1. When the carrier 2 needs to slide, the locking member 41 is driven upward by the locking drive mechanism 42, and the locking portion of the locking member 41 moves in the locking groove 21, so that the limiting wall of the locking groove 21 and the locking portion of the locking member 41 are in a relaxed state. The locking groove 21 avoids the locking member 41 when the carrier 2 slides. When the carrier 2 slides to a set position relative to the base 1, the locking member 41 can be driven downward by the locking drive mechanism 42, so that the locking portion of the locking member 41 and the limiting wall of the locking groove 21 are pressed tightly. The carrier 2 and the base 1 are locked and fixed by the tensioning action of the locking drive mechanism 42, which can improve the overall rigidity of the extended-range workbench, and is not easy to vibrate during workpiece processing, which is conducive to ensuring processing accuracy. In other embodiments, a locking groove can also be set on the locking member, and a locking track extending forward and backward can be set on the carrier. The locking track constitutes the locking part, and the locking track is used to cooperate with the locking groove of the locking member.

[0024] The locking groove 21 is arranged on the lower side of the main body of the carrier 2, with the notch of the locking groove 21 facing downward, and both sides of the locking groove 21 in the groove width direction are provided with limiting walls for cooperating with the locking portion of the locking member 41, which is conducive to reliable pressing of the locking member 41 and the limiting walls of the locking groove 21. In other embodiments, the locking groove can also be arranged on the side in the width direction of the main body of the carrier, with the notch of the locking groove facing one side in the left-right direction, and the lower side groove wall of the locking groove constitutes the limiting wall, and the locking portion of the locking member is hooked on the limiting wall to form a press fit.

[0025] The lower side of the main body of the carrier platform 2 is provided with a thickened convex portion protruding downward, and the locking groove 21 is provided at the thickened convex portion. The notch of the locking groove 21 is located on the thickened convex portion, and the thickened convex portion is flush with the side surface of the main body of the carrier platform 2 in the width direction. The thickened convex portion is used to ensure the structural strength of the part of the carrier platform 2 where the locking groove 21 is provided, and the upper and lower dimensions of the locking member 41 can be prevented from being too long, thereby ensuring the strength of the locking member 41. In other embodiments, the thickened convex portion protruding downward may not be provided, and the locking groove may be directly provided on the lower plane of the main body of the carrier platform.

[0026] The locking groove 21 is a T-shaped groove, the width of the locking groove 21 near the groove opening is smaller and the width of the part near the groove bottom is larger, and a part of the groove wall opposite to the groove bottom is provided in the locking groove 21, and the part of the groove wall constitutes a limiting wall. The locking member 41 is a T-shaped structure, and the locking member 41 has left and right extension sections and upper and lower extension sections, and the left and right extension sections constitute a locking portion, and the upper ends of the upper and lower extension sections are connected to the middle of the left and right extension sections, and the lower ends extend out of the locking groove 21 and connect to the locking drive mechanism 42, and the left and right parts of the left and right extension sections of the locking member 41 and the left and right limiting walls in the locking groove 21 are respectively used to form a press fit. The lower ends of the upper and lower extension sections of the locking member 41 constitute the connecting portion of the locking member 41 connected to the locking drive mechanism 42, so that the locking member 41 extends out of the locking groove 21, which is convenient for the connection operation. In other embodiments, the locking member may also be provided with no upper and lower extension sections, and the movable part of the locking drive mechanism for connecting the locking member extends into the locking groove.

[0027] Both ends of the base 1 in the length direction are provided with a locking mechanism 4. When the platform 2 moves forward to the limit position relative to the base 1, the rear end of the platform 2 corresponds to the rear end of the base 1, and the front end of the base 1 corresponds to the middle position of the platform 2. When the platform 2 moves backward to the limit position relative to the base 1, the front end of the platform 2 corresponds to the front end of the base 1, and the rear end of the base 1 corresponds to the middle position of the platform 2. By tightening the platform 2 with the locking mechanism 4 provided at the front and rear ends of the base 1, the lever force when the platform 2 slides to the limit position can be reduced. In other embodiments, the locking mechanism can also be provided only in the middle area of ​​the base in the length direction.

[0028] The in-place locking mechanism 4 is arranged on one side of the corresponding slide 11 along the width direction of the base 1, and the left and right slides 11 are respectively provided with five, and the corresponding left and right side locking mechanisms 4 are respectively provided with five, each slide 11 is correspondingly provided with a in-place locking mechanism 4, and the in-place locking mechanism 4 corresponds to the corresponding slide 11 in the left and right directions, and the in-place locking mechanism 4 corresponds to the middle position of the corresponding slide 11 in the front and back directions, so that when the in-place locking mechanism 4 pulls the bearing platform 2 and the base 1 together, the force application position of the in-place locking mechanism 4 is consistent with the position of the slide 11 supporting the bearing platform 2, and the force is evenly applied, which can avoid deformation of the bearing platform 2 and is beneficial to ensuring processing accuracy.

[0029] The in-place locking mechanism 4 is arranged on the outside of the corresponding slide 11, and the left and right rows of slides 11 are located between the left and right rows of in-place locking mechanisms 4. The left and right rows of slides 11 and the left and right rows of in-place locking mechanisms 4 are arranged symmetrically. The in-place locking mechanism 4 is located on the side of the slide 11 away from the central area in the width direction of the base 1, which is convenient for arrangement and convenient for wiring of the locking drive mechanism 42. In other embodiments, the in-place locking mechanism can also be arranged on the inner side of the corresponding slide, so that the in-place locking mechanism is located on the side of the slide close to the central area in the width direction of the base.

[0030] The width direction of the base 1 is the left-right direction, and the left and right rows of in-place locking mechanisms 4 are arranged at intervals along the width direction of the base 1. Each row has multiple in-place locking mechanisms 4, which is conducive to reliable locking. Each in-place locking mechanism 4 is arranged at intervals for easy installation. In other embodiments, the locking member of the in-place locking mechanism can also extend along the front-to-back direction and have a sufficient length. The same locking member is connected to multiple locking drive mechanisms. The same in-place locking mechanism includes a locking member and multiple locking drive mechanisms. Multiple locking drive mechanisms are used to jointly apply tension to a locking member. In this case, two left and right in-place locking mechanisms can be set on the base.

[0031] The locking drive mechanism 42 is a telescopic cylinder. The telescopic cylinder in this embodiment is a hydraulic cylinder. In other embodiments, the locking drive mechanism may also be a pneumatic cylinder or an electric push rod. The telescopic cylinder includes a cylinder body and a piston rod. The piston rod is connected to the locking member 41, and the cylinder body is fixed to the base 1. The base 1 is provided with a mounting cavity for the lower part of the cylinder body of the locking drive mechanism 42 to extend into. The mounting cavity has an upward opening for the cylinder body to be installed. The lower part of the cylinder body of the locking drive mechanism 42 extends into the corresponding mounting cavity of the base 1. The middle part of the cylinder body of the locking drive mechanism 42 in the vertical direction is provided with a flange for fixing at the opening of the mounting cavity of the base 1. The upper part of the cylinder body of the locking drive mechanism 42 protrudes upward from the base 1, and the upper end of the piston rod is connected to the locking member 41. The mounting cavity on the base 1 is used to provide a part of the installation space of the locking drive mechanism 42, which is compact in structure, saves space, and is convenient for the selection of the hydraulic cylinder. In other embodiments, if space permits, the locking drive mechanism can also be directly arranged on the upper side of the base.

[0032] The support platform 2 is provided with an electromagnetic chuck 5, and multiple electromagnetic chucks 5 are provided along the length direction of the support platform 2, which can fix the workpiece by magnetic absorption, facilitate the workpiece fixing operation, and improve the processing efficiency. In other embodiments, a clamp can also be set on the support platform to clamp and fix the workpiece.

[0033] The sliding drive motor 3 is fixed at the rear end of the base 1, and the screw nut mechanism includes a transmission screw 31 and a transmission nut 32. The transmission screw 31 extends along the length direction of the base 1, and the transmission screw 31 is rotatably mounted on the base 1. The transmission nut 32 is threadedly connected to the transmission screw 31. The transmission nut 32 is fixed to the bearing platform 2. The sliding drive motor 3 drives the transmission screw 31 to rotate, so that the transmission nut 32 moves forward and backward on the transmission screw 31, thereby driving the bearing platform 2 to slide forward and backward. A lower side avoidance groove is provided in the central area in the width direction of the upper side surface of the base 1, and an upper side avoidance groove is provided in the central area in the width direction of the lower side surface of the bearing platform 2. The lower side avoidance groove corresponds to the upper side avoidance groove in upper and lower directions, and the depth of the lower side avoidance groove is greater than the depth of the upper side avoidance groove. The transmission connection structure between the sliding drive motor 3 and the transmission screw 31 can be avoided by using the lower side avoidance groove and the upper side avoidance groove. The transmission screw 31 is installed in the lower side avoidance groove of the base. Each in-position locking mechanism 4, guide rail 20 and slide seat 11 are arranged on the left and right sides of the corresponding avoidance groove.

[0034] In this embodiment, the workpiece is a guide rail base, the material is Q345 steel, and it belongs to a slender plate structure, with a total length of 4920mm, a width of 174mm, and a thickness of 13.5mm. The upper and lower planes of the workpiece have flatness requirements and parallelism requirements. According to the length dimension requirements of the workpiece, an extended-range workbench is designed. The extended-range workbench is installed on the original workbench of the gantry machining center with an X-direction stroke of 3000mm. The X-direction is the front-to-back direction. The base 1 of the extended-range workbench is 3000mm long and is fixed to the workbench of the gantry machining center with bolts. The bearing platform 2 is 5400mm long, and the table length is greater than the workpiece length. It is slidably connected to the slide seat 11 through the guide rail 20. The sliding drive motor 3 is a servo feed motor. The servo feed motor is connected to the double-nut ball screw through a coupling. The double-nut ball screw constitutes a screw nut mechanism to drive the bearing platform 2 to move forward and backward. A locking mechanism 4 is provided between the base 1 and the carrier 2. When the carrier 2 does not need to move, the carrier 2 can be locked. When released, the carrier 2 can move to achieve continuous processing. The carrier 2 is equipped with an electromagnetic chuck 5. There are three electromagnetic chucks 5, each 1500 mm long, and one is installed every 130 mm. The magnetization and demagnetization are controlled by a switch to adsorb, fix and release the workpiece.

[0035] The extended-range worktable is used to complete the processing of workpieces with a length of 4920mm on a gantry machining center with a stroke of 3000mm, expanding the processing capacity of the machine tool. The servo feed motor is connected to the double-nut ball screw through a coupling to drive the linear motion of the carrier, which can effectively ensure the motion accuracy, positioning accuracy and overall rigidity of the extended-range worktable. By controlling the servo feed motor, the extended-range worktable and the original worktable of the machine tool can work in conjunction, realizing continuous processing of parts. The electromagnetic chuck is used to achieve rapid clamping and disassembly of slender plate-like workpieces, greatly reducing the auxiliary processing time while ensuring the processing accuracy requirements.

[0036] When the load platform is in the extreme position, the overhang length is too long. The joints between the guide rail and the slide seat not only have to bear the pressure of the load platform, but also need to bear the lever force brought by the overhanging part of the load platform, which increases the load acting on the guide rail and the slide seat. Long-term use will accelerate the wear of the linear guide rail and reduce its service life. By setting up an in-place locking mechanism, it is beneficial for the linear guide rail to be evenly stressed in a non-moving state. The in-place locking mechanism can share part of the lever force, reduce the influence of the lever force on the guide rail in the overhanging state of the load platform, and increase the service life of the guide rail and the slide seat. By locking the base and the load platform, the overall rigidity of the extended-range workbench can also be greatly improved, and the processing vibration can be reduced, which is beneficial to improve the processing accuracy of parts, reduce the influence of processing vibration on the guide rail, prevent fatigue damage of the guide rail, and reduce the accuracy, thereby increasing the service life of the guide rail.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. An extended-range workbench, comprising a bearing platform for bearing a workpiece and a base for fixing to a machine tool, wherein the bearing platform is slidably arranged on the base, and wherein: The base is provided with an in-place locking mechanism, which includes a locking piece and a driving mechanism for driving the locking piece to move up and down. A locking groove is provided on one of the bearing platform and the locking piece, and a locking portion that is movably inserted into the locking groove is provided on the other. The locking groove is provided with a limiting wall for pressing and fitting with the locking portion. The locking groove extends along the sliding direction of the bearing platform to avoid the locking portion when the bearing platform slides. The locking piece has a locking state in its up and down moving stroke that presses the locking portion and the limiting wall when the bearing platform slides to a set position to lock and fix the bearing platform and the base.

2. The extended range workbench according to claim 1, characterized in that: The locking groove is arranged on the supporting platform, the locking part is arranged on the locking piece, the notch of the locking groove faces downward, and the limiting walls for cooperating with the locking part are arranged on both sides of the locking groove in the groove width direction.

3. The extended range workbench according to claim 2, characterized in that: A thickened convex portion protruding downward is provided on the lower side of the bearing platform, and the locking groove is arranged at the thickened convex portion.

4. The extended range workbench according to claim 2 or 3, characterized in that: The locking piece has a connecting portion extending out of the locking groove, and the connecting portion is connected to the driving mechanism.

5. The extended-range workbench according to claim 1, 2 or 3, characterized in that: The length direction of the base is consistent with the sliding direction of the bearing platform, and both ends of the base in the length direction are provided with the in-position locking mechanism.

6. The extended range workbench according to claim 1, 2 or 3, characterized in that: More than two slide seats are arranged on the base along the sliding direction of the bearing platform at intervals, and the slide seats are provided with structures for slidingly cooperating with the bearing platform. The in-position locking mechanism is arranged on one side of the corresponding slide seat along the width direction of the base.

7. The extended range workbench according to claim 6, characterized in that: The in-position locking mechanism is arranged on the outer side of the corresponding sliding seat.

8. The extended-range workbench according to claim 1, 2 or 3, characterized in that: The in-place locking mechanisms are arranged in two rows at intervals along the width direction of the base, and each row is provided with more than two in-place locking mechanisms.

9. The extended range workbench according to claim 1, 2 or 3, characterized in that: The driving mechanism is a telescopic cylinder, which includes a cylinder body and a piston rod. The piston rod is connected to a locking piece. The cylinder body is fixed to a base, and the base is provided with an installation cavity for the cylinder body to extend into.

10. The extended-range workbench according to claim 1, 2 or 3, characterized in that: An electromagnetic chuck is provided on the bearing platform for fixing the workpiece by magnetic attraction.

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