Workbench transformation method and transformation platform for over-travel machining of machine tool

Abstract

The invention belongs to the field of machine tool transformation, and relates to a workbench transformation method and transformation platform for machine tool over-travel machining. The method comprises the following steps: measuring the over-stroke machine tool precision of a modified machine tool according to the precision of an original machine tool; the transformed machine tool is a transformed platform obtained by removing a working platform of an original machine tool, digging a certain depth downwards and replacing three small and thin transformed working platforms; and when the precision of the machine tool exceeds the stroke and meets the preset precision requirement, a modified workbench is installed.

Description

Technical Field

[0001] This invention belongs to the field of machine tool modification, and relates to a method and platform for modifying a machine tool's over-travel machining worktable. Background Technology

[0002] During machine tool processing, the product to be processed is usually mounted on the machine tool's worktable, sometimes with positioning mechanisms added to the worktable. Due to the limitations of the worktable, the machine tool's top and bottom are fixed and cannot move. This is especially problematic when dealing with exceptionally tall products, such as... Figure 1 As shown, the machine tool travel cannot reach the height of the product being processed, or it cannot be installed in the machine tool for processing. Summary of the Invention

[0003] Objective: This invention addresses the problem of installing positioning devices after the machine tool's travel distance, and solves the problem of measuring the positioning accuracy of the machine tool in three-dimensional space after increasing the machine tool's travel distance. This invention enables the installation and positioning of ultra-high-precision molds within the machine tool, allowing for product processing beyond the machine tool's travel distance. Technical solution: Firstly, a method for modifying a machine tool's worktable for overtravel machining is provided, including: The accuracy of the modified machine tool is measured based on the accuracy of the original machine tool. The modified machine tool is obtained by removing the original machine tool's work platform, digging down to a certain depth, and replacing it with three small and thin modified worktables. When the machine tool accuracy exceeds the preset accuracy requirements beyond its travel range, the worktable is installed and modified.

[0004] Furthermore, based on the original machine tool's accuracy measurement, the overtravel accuracy of the modified machine tool includes: Step 1: Install and align the marble ruler on the original machine tool according to the usage requirements; Step 2: Establish the XYZ coordinate system within the original machine tool travel range; Step 3: Fix the standard rings on the XZ and YZ planes of the marble ruler with double-sided tape, and mark the positions by swinging the A axis 90 degrees. Step 4: Add the simulated minimum Z value and re-establish the XYZ coordinate system; Step 5: Replace the original Z value with the newly constructed one, verify steps 2 and 3, and record the position by swishing the A-axis 90 degrees. Step 6: Record the cumulative difference in position based on steps 3 and 5. As long as it is within the preset range.

[0005] Furthermore, the method also includes: If the cumulative difference is not within the preset range, it means that the machine tool is not suitable for modification or the machine tool hardware accuracy needs to be adjusted.

[0006] Furthermore, the installation and modification of the workbench includes: For any plate, drill oblique mounting holes on the excavated plane corresponding to the mounting leg positions, insert four evenly distributed mounting legs, and grind the upper end faces of the four mounting legs until the horizontal difference between the four end faces is within 0.03mm, wherein the end face of the mounting leg is higher than the excavated plane; place the mounting plate on the four end faces and weld; drill holes in the plate to make the threaded holes evenly distributed on the plate; tighten the bolts in the reverse direction on the threaded holes at the four corners of the plate. Use a machine tool to mark three mounting plates and adjust the flatness of the three plates to within 0.03mm; pour chemical anchoring agent into the four mounting legs of each plate for curing. Fill the remaining threaded holes with plastic wrap, make a mold around the edges, and pour cement mortar into the bottom of the flat plate to complete the workbench modification. Furthermore, the curing conditions are room temperature curing for 50 minutes.

[0007] Secondly, a modified worktable for overtravel machining on a machine tool is provided, comprising: Mounting slots, plates, mounting legs, bolts, and cement layer; The mounting slot is a deep groove formed by removing the original machine tool's work platform and excavating to a certain depth. Angled mounting holes are set on the bottom surface of the mounting groove corresponding to the mounting leg positions. The mounting legs are installed and fixed in the mounting holes. The mounting legs are exposed on the bottom surface of the mounting groove. Four mounting legs are grouped together, and a plate is installed on the upper end. Bolts for leveling the plate are screwed in the opposite direction at the four corners of the plate. Cement mortar is poured between the lower end of the plate and the mounting groove to form a cement layer.

[0008] Furthermore, threaded holes are evenly distributed on the flat plate.

[0009] Furthermore, the thickness of the flat plate is 1 / 10 of the thickness of the original machine tool working platform.

[0010] Furthermore, the chemical anchor bolts are cured with a solution in the mounting holes.

[0011] Beneficial effects: This invention effectively solves the problem of machining products exceeding the machine tool's travel range, as well as installation and positioning. It features a simple structure, cost savings, ease of use, and wide applicability, providing valuable reference for the installation, positioning, and machining of similar ultra-high-performance products. It has achieved excellent quality and economic benefits.

[0012] 1. It can be used in combination. The mold can be placed directly on it. When adjusting, it can be lifted with a jack and copper sheet can be inserted, or it can be placed on a screw jack. 2. A single 600 platform can be placed; 3. Three mounting reference plates can be used to place platforms of two sizes, 2000×2000×350 or 2000×1500×500, just like before the modification. 4. The zero-point positioning system can be installed directly. Attached Figure Description

[0013] Figure 1 A schematic diagram for measuring the accuracy of a machine tool beyond its travel range.

[0014] Figure 2 This is a schematic diagram of the plate and mounting legs. Wherein, 1-plate, 2-mounting leg.

[0015] Figure 3 This is a schematic diagram of a plate and a bolt. 3 represents the bolt.

[0016] Figure 4 To transform the platform Figure 1 .

[0017] Figure 5 To transform the platform Figure 2 . Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The features and illustrative embodiments of various aspects of the present invention will now be described in detail. Numerous specific details are set forth in the following detailed description to provide a thorough understanding of the invention. However, it will be apparent to those skilled in the art that the invention may be practiced without requiring some of these specific details. The following description of embodiments is merely intended to provide a better understanding of the invention by illustrating examples of the invention. The invention is by no means limited to any specific setups and methods set forth below, but covers any improvements, substitutions, and modifications to structures, methods, and devices without departing from the spirit of the invention. Well-known structures and techniques are not shown in the drawings and the following description to avoid unnecessarily obscuring the invention.

[0020] In the description of this invention, it should be noted that the directions or positional relationships indicated by terms such as "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer" are based on the directions or positional relationships shown in the accompanying drawings and are only for the convenience of describing and simplifying the invention, and should not be construed as limiting the invention. Furthermore, the use of ordinal numbers (e.g., "first and second," etc.) is for distinguishing objects and is not limited to this order, and should not be construed as indicating or implying relative importance.

[0021] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly, encompassing both direct connection and indirect connection via an intermediate medium. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances.

[0022] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other, and the various embodiments can be referenced and cited in each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0024] 1. Measuring the accuracy of machine tools beyond their travel range: 1) Install and align the marble ruler on the machine tool according to the usage requirements; 2) Establish Z0 within the machine tool's travel range; 3) Fix the standard rings on the XZ and YZ planes of the marble ruler with double-sided tape. Swing the A-axis 90 degrees and record the position and the XYZ values ​​when the dial does not jump. 4) Add the simulated minimum Z value and re-establish the Z0 coordinate; 5) Replace the original Z value with the newly established one and verify steps 2 and 3. The difference should be within ±0.015mm. If the difference is too large, check the five-axis linkage accuracy of the equipment, the coaxiality of the lever dial indicator and the machine tool spindle, the perpendicularity of the machine tool A axis at A0, and the horizontality at A90. 6) If the above accuracy is fine, but the difference in steps 2 and 3 is consistently greater than ±0.05mm, it indicates that the modification is not suitable. The decision to continue modifying the equipment should be based on the accuracy of the product being processed.

[0025] 2. Installation of the workbench ( Figure 2-3 ): Because during clamping, it is necessary not only to install a flat plate to resist gravity and lateral tilting force, but also to ensure that there is no slight deformation during the cement curing process. 1) First, design the mounting plate to be made of 45# steel with a material of 350mm×350mm×30mm. Roughly machine the outer dimensions, leaving a 0.5mm allowance on the top and bottom surfaces. Drill the threaded holes, and drill M16×2 threaded through holes evenly distributed in the middle of the hole with a hole spacing of 45mm. Then, perform bluing heat treatment. Grind the three plates together to ensure that the flatness of the top and bottom surfaces is ≤0.01mm. 2) Tighten the bolts in the opposite direction at the four corners, making sure the bolts are fully screwed into the threads, but the bolt heads should not protrude above the exposed parts of the mounting legs. Alternatively, four long bolts can be tightened in the forward direction at the four corners, but the excess parts need to be sawed off after the cement has hardened, and the four holes need to be ground quite low, otherwise it will affect the flatness when expanding the use later. This method is worse than the reverse installation method, but it is not as convenient as it is for later use. 3) Drill angled mounting holes at the mounting leg positions, insert the four evenly distributed mounting legs, tamp them down with a hammer, then use a laser projector for rough leveling, then use a machine tool to mark the upper surface of the mounting legs, and grind the high areas with a grinder. Finally, the coplanarity of the upper surfaces of the four mounting legs is within 0.03mm. Place the mounting plate on top and weld. At this time, the mounting plate has some movement. 4) Use a machine tool to mark three mounting plates and adjust the flatness of the three plates to within 0.03mm. Pour chemical anchor solution (cured at room temperature for 50 minutes) into the four mounting legs. Tighten the bolts in the opposite direction to support the iron plate and ensure that its flatness is not affected by subsequent processes. 5) Stuff the threaded hole with plastic wrap, make a mold around it, and pour cement mortar into the bottom of the mounting plate. The height of the mortar should not be higher than the mounting plate. Example Five-axis machine tools have been successfully modified so far. Figure 4-5 As shown, its structure is a fixed beam gantry with a single-sided hanging cross axis five-axis machine tool. The successfully modified systems are FIDIA, Siemens 840dsl, and Huazhong system.

Claims

1. A method for modifying a machine tool's worktable for overtravel machining, characterized in that, include: The accuracy of the modified machine tool is measured based on the accuracy of the original machine tool, and the accuracy of the machine tool beyond its travel. The modified machine tool is obtained by removing the original machine tool's work platform, digging down to a certain depth, and replacing it with three small and thin modified worktables. When the machine tool accuracy exceeds the preset accuracy requirements beyond its travel range, the worktable is installed and modified.

2. The method according to claim 1, characterized in that, The accuracy of the modified machine tool beyond its travel range is measured based on the accuracy of the original machine tool, including: Step 1: Install and align the marble ruler on the original machine tool according to the usage requirements; Step 2: Establish the XYZ coordinate system within the original machine tool travel range; Step 3: Fix the standard rings on the XZ and YZ planes of the marble ruler with double-sided tape, and mark the positions by swinging the A axis 90 degrees. Step 4: Add the simulated minimum Z value and re-establish the XYZ coordinate system; Step 5: Replace the original Z value with the newly constructed one, verify steps 2 and 3, and record the position by swishing the A-axis 90 degrees. Step 6: Record the cumulative difference in position based on steps 3 and 5. As long as it is within the preset range.

3. The method according to claim 2, characterized in that, The method further includes: If the cumulative difference is not within the preset range, it means that the machine tool is not suitable for modification or the machine tool hardware accuracy needs to be adjusted.

4. The method according to claim 2, characterized in that, Installation and modification of the workbench, including: For any plate, drill oblique mounting holes on the excavated plane corresponding to the mounting leg positions, insert four evenly distributed mounting legs, and grind the upper end faces of the four mounting legs until the horizontal difference between the four end faces is within 0.03mm, wherein the end face of the mounting leg is higher than the excavated plane; place the mounting plate on the four end faces and weld; drill holes in the plate to make the threaded holes evenly distributed on the plate; tighten the bolts in the reverse direction on the threaded holes at the four corners of the plate. Use a machine tool to mark three mounting plates and adjust the flatness of the three plates to within 0.03mm; pour chemical anchoring agent into the four mounting legs of each plate for curing. Fill the remaining threaded holes with plastic wrap, make a mold around the edges, and pour cement mortar into the bottom of the flat plate to complete the workbench modification.

5. The method according to claim 4, characterized in that, The curing conditions are room temperature curing for 50 minutes.

6. A modified worktable for overtravel machining on a machine tool, characterized in that, include: Mounting slots, plates, mounting legs, bolts, and cement layer; The mounting slot is a deep groove formed by removing the original machine tool's work platform and excavating to a certain depth. Angled mounting holes are set on the bottom surface of the mounting groove corresponding to the mounting leg positions. The mounting legs are installed and fixed in the mounting holes. The mounting legs are exposed on the bottom surface of the mounting groove. Four mounting legs are grouped together, and a plate is installed on the upper end. Bolts for leveling the plate are screwed in the opposite direction at the four corners of the plate. Cement mortar is poured between the lower end of the plate and the mounting groove to form a cement layer.

7. The workbench according to claim 6, characterized in that, Threaded holes are evenly distributed on the flat plate.

8. The workbench according to claim 7, characterized in that, The thickness of the plate is 1 / 10 of the thickness of the original machine tool working platform.

9. The workbench according to claim 7, characterized in that, The chemical anchor for the mounting leg is cured with a chemical solution in the mounting hole.

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