Tool for solving problem that size of workpiece exceeds travel range of machine tool

Abstract

The invention relates to a tool for solving the problem that the size of a workpiece exceeds the stroke range of a machine tool, and relates to the field of machining equipment.The tool comprises a milling tire bottom plate, the upper end face of the milling tire bottom plate abuts against the lower end face of the workpiece, a circular groove is formed in the upper end face of the milling tire bottom plate, and the side wall of the circular groove abuts against the outer wall of a convex ring of the workpiece; a convex ring of the workpiece is inserted into the circular groove and rotationally connected with the milling tire bottom plate in the axis direction of the circular groove, a positioning pin is inserted into the upper end face of the milling tire bottom plate, the axis of the positioning pin perpendicularly intersects with the center circle of the circular holes in the workpiece, and the upper end of the positioning pin is located above the circular holes of the workpiece; the outer diameter of the part, in the circular hole, of the positioning pin is the same as the inner diameter of the circular hole, a locking assembly fixed to the workbench is arranged on the lower end face of the milling tire bottom plate, and a flat key matched with a sliding groove formed in the workbench is arranged on the lower end face of the milling tire bottom plate. The machining method has the effects of machining workpieces exceeding the stroke range on the machine tool with the small machining stroke and improving the utilization rate and the machining precision of the machine tool.

Description

Technical Field

[0001] This application relates to the field of machining equipment, and particularly to a tooling for solving the problem that the size of a workpiece exceeds the stroke range of a machine tool. Background Art

[0002] In the field of machining, especially for large or complex-shaped workpieces, machining centers and milling machines are widely used. These devices can effectively machine various types of holes, slots, and other complex geometries through high-precision cutting operations. However, with the continuous development of industrial production, more and more large-sized workpieces need to be precision machined, which poses new challenges to existing machining equipment.

[0003] Refer to Figure 1 , both ends of the workpiece are provided with convex rings, and a through hole is provided in the middle of the workpiece. Holes need to be machined on both end faces of the workpiece. After several φ15 circular holes are machined at the lower end of the workpiece using a drilling machine, several R10.25 waist-shaped holes need to be machined at the upper end of the workpiece. Since the waist-shaped holes cannot be drilled, they can only be milled on a machining center or a milling machine. A workbench is installed on the machining center or the milling machine, and several chutes are provided on the workbench. The workpiece is installed on the workbench, bolts are placed in the chutes, and the bolts are passed through the circular holes and fixedly connected by nuts.

[0004] Moreover, there are coaxiality and angular relationships at both ends of the workpiece. Since the pitch circle of the workpiece holes is larger than the stroke range of the machine tool, it can only be machined on a machine tool with a corresponding machining stroke. Traditional machining centers and milling machines usually have certain stroke range limitations. Once the workpiece size exceeds this range, effective machining cannot be carried out on them. This not only limits the application range of the machining equipment but also affects production efficiency and product quality. Summary of the Invention

[0005] In order to machine workpieces that exceed the stroke range on a machine tool with a small machining stroke and improve the utilization rate and machining accuracy of the machine tool, this application provides a tooling for solving the problem that the size of a workpiece exceeds the stroke range of a machine tool.

[0006] This application provides a tooling for solving the problem that the size of a workpiece exceeds the stroke range of a machine tool, adopting the following technical solutions: A tooling for solving the problem that the size of the workpiece exceeds the travel range of the machine tool, including a milling base plate. The upper end face of the milling base plate abuts against the lower end face of the workpiece. A circular groove is formed on the upper end face of the milling base plate, and the side wall of the circular groove abuts against the outer wall of the convex ring of the workpiece. The convex ring of the workpiece is inserted into the circular groove and is rotationally connected to the milling base plate along the axis direction of the circular groove. A positioning pin is inserted into the upper end face of the milling base plate, and the axis of the positioning pin is perpendicularly intersected with the center circle of several circular holes on the workpiece. The upper end of the positioning pin is located above the circular holes of the workpiece, and the outer diameter of the part of the positioning pin in the circular holes is the same as the inner diameter of the circular holes. The lower end face of the milling base plate is provided with a locking assembly fixed to the workbench, and the lower end face of the milling base plate is provided with a flat key adapted to the chute opened on the workbench.

[0007] By adopting the above technical solution, it is realized that the size of the workpiece for machining the waist-shaped hole is not limited by the travel range of the machine tool, the utilization rate of the machine tool is improved, and the machining accuracy and positional tolerance requirements of the waist-shaped hole are ensured. The close fit and rotational connection between the milling base plate and the workpiece enable the workpiece to rotate precisely during the machining process, meeting the machining requirements at different angles, thus avoiding the problem that the workpiece cannot be machined due to its size exceeding the travel range. The design of the positioning pin ensures the precise positioning of the workpiece after each rotation, further improving the machining accuracy and positional tolerance requirements. The setting of the locking assembly and the flat key enables the milling base plate to be firmly fixed on the workbench, ensuring the stability of the entire machining process, and at the same time facilitating the installation and disassembly of the tooling. The overall structure is simple and reliable, effectively utilizing the existing machine tool resources and improving the use efficiency of the machine tool.

[0008] Optionally, an installation groove is formed on the lower end face of the milling base plate, and the installation groove is completely penetrated along the radial direction of the milling base plate. The upper end of the flat key is located in the installation groove, and the side wall of the flat key abuts against the side wall of the installation groove. First inner hexagon bolts are inserted at both ends of the flat key along the penetrating direction of the installation groove. The threaded ends of the first inner hexagon bolts pass through the flat key and are threadedly connected to the milling base plate, and the lower end face of the first inner hexagon bolts is not lower than the lower end face of the flat key.

[0009] By adopting the above technical solution, the setting of the first inner hexagon bolts ensures the stable connection between the flat key and the milling base plate, improves the overall stability of the tooling, effectively prevents the flat key from loosening or falling off due to vibration during the machining process, and thus ensures the machining accuracy and reliability. At the same time, the close fit between the flat key and the installation groove and the chute of the workbench enables the tooling to slide smoothly on the workbench and cannot rotate along the axis of the milling base plate, further improving the stability and efficiency during the machining process.

[0010] Optionally, two groups of the locking assemblies are arranged along the penetrating direction of the installation groove, and the flat key is located between the two groups of locking assemblies.

[0011] By adopting the above technical solution, the design of the two sets of locking components enables the tooling to be firmly fixed on the workbench at different positions, further enhancing the applicability and flexibility of the tooling. This design not only effectively solves the problem that the workpiece size exceeds the machine tool stroke range, but also improves the utilization rate of the machine tool and ensures the machining accuracy and positional tolerance requirements of the waist-shaped holes.

[0012] Optionally, the locking component includes a T-shaped block and a second hexagon socket head bolt. The T-shaped block is located below the milling base plate. The T-shaped block is used to slide in the chute of the workbench. The threaded end of the second hexagon socket head bolt passes through the milling base plate and is threadedly connected to the T-shaped block. The upper end surface of the second hexagon socket head bolt is not higher than the upper end surface of the milling base plate.

[0013] By adopting the above technical solution, the T-shaped block is located in the chute of the workbench. The T-shaped block and the milling base plate are fixed together by the second hexagon socket head bolt, ensuring that the milling base plate can be firmly fixed on the workbench, enabling the machining of large-size workpieces on a machine tool with a small stroke and improving the utilization rate of the machine tool.

[0014] Optionally, it further includes a pressing plate. The pressing plate is located above the milling base plate. The pressing plate is used to press the workpiece against the milling base plate.

[0015] By adopting the above technical solution, the pressing plate presses the workpiece against the milling base plate, ensuring the stability and reliability of the workpiece during the machining process, avoiding machining errors caused by workpiece loosening, and improving the machining accuracy and positional tolerance requirements.

[0016] Optionally, a pressing block is fixedly connected to the bottom surface of the circular groove. The pressing block is located on the axis of the milling base plate. A pressing bolt is inserted into the pressing plate. The threaded end of the pressing bolt passes through the pressing plate and is threadedly connected to the pressing block.

[0017] By adopting the above technical solution, the cooperation between the pressing block and the pressing bolt enables the pressing plate to press the workpiece against the milling base plate, preventing the workpiece from displacing or vibrating during the machining process, thus ensuring the stability and machining accuracy of the workpiece. At the same time, it can adapt to workpieces of different heights, increasing the applicability and flexibility of the tooling. And the cooperation between the pressing block and the pressing bolt makes the operation of pressing the workpiece simpler and faster, improving the work efficiency.

[0018] Optionally, sliding plates are inserted into two opposite side walls of the pressing plate. The sliding plates are slidably connected to the pressing plate along the direction perpendicular to the plane where the side walls where they are inserted are located.

[0019] By adopting the above technical solution, the design of the sliding plates can extend the length of the pressing plate. When the diameter of the through hole in the middle of the workpiece is greater than the length of the pressing plate, pull out the sliding plates outward so that the lower end surface of the sliding plates abuts against the workpiece, adapting to workpieces of different sizes and increasing the applicability and flexibility of the tooling.

[0020] Optionally, the milling base plate includes a snap ring located in the circular groove. The inner wall of the snap ring abuts against the outer wall of the convex ring of the workpiece. The snap ring is coaxially arranged with the milling base plate. A plurality of grooves are provided on the upper end surface of the milling base plate. Fastening bolts are arranged in the grooves. The threaded ends of the fastening bolts pass through the side wall of the circular groove horizontally and are threadedly connected with the snap ring. The upper end surface of the milling base plate is provided with positioning grooves along its radial direction. The lower end of the positioning pin is inserted into the positioning groove, and the outer wall of the lower end of the positioning pin abuts against the inner wall of the positioning groove.

[0021] By adopting the above technical solution, the snap ring is fixedly connected with the milling base plate through the fastening bolts. Different snap rings with different wall thicknesses can be replaced to adapt to the convex rings of workpieces with different sizes. At the same time, the cooperation of the positioning groove and the positioning pin can adapt to workpieces with different outer diameters, increasing the applicability and flexibility of the tooling.

[0022] In summary, the present application includes at least one of the following beneficial technical effects: 1. It realizes that the workpiece size for machining waist-shaped holes is not limited by the stroke range of the machine tool, improves the utilization rate of the machine tool, and ensures the machining accuracy and position requirements of the waist-shaped holes. The close fit and rotational connection between the milling base plate and the workpiece enable the workpiece to rotate precisely during the machining process, meeting the machining requirements at different angles, thus avoiding the problem that the workpiece cannot be machined due to its size exceeding the stroke range; the design of the positioning pin ensures the precise positioning of the workpiece after each rotation, further improving the machining accuracy and position requirements. The setting of the locking assembly and the flat key enables the milling base plate to be firmly fixed on the workbench, ensuring the stability of the entire machining process, and at the same time facilitating the installation and disassembly of the tooling. The overall structure is simple and reliable, effectively utilizing the existing machine tool resources and improving the use efficiency of the machine tool; 2. The setting of the first hexagon socket head bolt ensures the stable connection between the flat key and the milling base plate, improves the overall stability of the tooling, effectively prevents the flat key from loosening or falling off due to vibration during the machining process, thus ensuring the machining accuracy and reliability; at the same time, the close fit between the flat key and the installation groove and the sliding groove of the workbench enables the tooling to slide smoothly on the workbench and cannot rotate along the axis of the milling base plate, further enhancing the stability and efficiency during the machining process; 3. The design of the two groups of locking assemblies enables the tooling to be firmly fixed on the workbench at different positions, further enhancing the applicability and flexibility of the tooling; this design not only effectively solves the problem that the workpiece size exceeds the stroke range of the machine tool, but also improves the utilization rate of the machine tool and ensures the machining accuracy and position requirements of the waist-shaped holes. Brief Description of the Drawings

[0023] Figure 1 It is a structural schematic diagram of the workpiece and the workbench.

[0024] Figure 2 It is a schematic structural diagram of the milling base plate, workpiece and workbench in Embodiment 1.

[0025] Figure 3 It is Figure 2 a schematic cross-sectional view of.

[0026] Figure 4 It is Figure 2 a schematic structural diagram of the milling base plate in.

[0027] Figure 5 It is a schematic structural diagram of the milling base plate and workbench in Embodiment 2.

[0028] Figure 6 It is Figure 5 a schematic cross-sectional view of.

[0029] Figure 7 It is Figure 5 a top view of the milling base plate in.

[0030] Explanation of reference numerals: 100, workpiece; 110, circular hole; 120, waist-shaped hole; 130, convex ring; 140, through hole; 200, workbench; 210, chute; 1, milling base plate; 11, circular groove; 12, mounting groove; 13, pressing block; 14, pressing bolt; 15, snap ring; 16, groove; 17, fastening bolt; 18, positioning groove; 2, positioning pin; 3, locking assembly; 31, T-shaped block; 32, second hexagon socket head bolt; 4, flat key; 41, first hexagon socket head bolt; 5, pressing plate; 51, sliding plate. Detailed implementation manners

[0031] The following further describes the present application in detail with reference to all the drawings.

[0032] Embodiment 1 The embodiment of the present application discloses a tooling for solving the problem that the size of the workpiece exceeds the stroke range of the machine tool.

[0033] Referring to Figure 2 , a tooling for solving the problem that the size of the workpiece exceeds the stroke range of the machine tool includes a milling base plate 1, and the milling base plate 1 is disc-shaped.

[0034] Referring to Figure 3 and Figure 4, a mounting groove 12 is provided on the lower end face of the milling tire bottom plate 1. The mounting groove 12 is completely penetrated along the radial direction of the milling tire bottom plate 1. A flat key 4 is installed in the mounting groove 12, and the type of the flat key 4 is B-type flat key 4. The upper end of the flat key 4 is located in the mounting groove 12, and the lower end of the flat key 4 is located in the sliding groove 210 of the workbench 200. The side walls of the mounting groove 12 and the inner walls of the sliding groove 210 are both in contact with the side walls of the flat key 4. The close fit of the flat key 4 with the mounting groove 12 and the sliding groove 210 of the workbench 200 enables the tooling to slide smoothly on the workbench 200 and cannot rotate along the axis of the milling tire bottom plate 1, improving the stability and efficiency during the processing. At both ends of the flat key 4 along the penetrating direction of the mounting groove 12, first hexagon socket head cap screws 41 are inserted. The threaded ends of the first hexagon socket head cap screws 41 pass through the flat key 4 and are threadedly connected to the milling tire bottom plate 1. The lower end face of the first hexagon socket head cap screw 41 is not lower than the lower end face of the flat key 4. The flat key 4 and the milling tire bottom plate 1 are firmly connected together by two first hexagon socket head cap screws 41, improving the connection strength and stability between the flat key 4 and the milling tire bottom plate 1, thereby ensuring the stability and reliability of the tooling in a higher-load processing environment, effectively preventing the flat key 4 from loosening or falling off due to vibration during the processing, and thus ensuring the machining accuracy and reliability.

[0035] Refer to Figure 3 and Figure 4 , a locking assembly 3 fixed to the workbench 200 is provided on the lower end face of the milling tire bottom plate 1. There are two groups of the locking assembly 3 arranged along the penetrating direction of the mounting groove 12. The flat key 4 is located between the two groups of the locking assembly 3. By increasing the number of the locking assembly 3, the connection strength and stability between the milling tire bottom plate 1 and the workbench 200 can be further improved, thereby ensuring the stability and reliability of the tooling in a higher-load processing environment. This design is particularly suitable for processing occasions that need to bear higher loads, can effectively prevent the flat key 4 from loosening or falling off during the processing, and further improves the machining accuracy and positional accuracy requirements.

[0036] Refer to Figure 3 and Figure 4, the locking assembly 3 includes a T-shaped block 31 and a second hexagon socket head bolt 32. The T-shaped block 31 is located below the milling tire base plate 1 and can slide in the chute 210 of the workbench 200. The width of the T-shaped block 31 matches the width of the chute 210. The T-shaped block 31 is composed of a vertical block above and a horizontal block below. Along the direction perpendicular to the installation groove 12, the length of the horizontal block is greater than that of the vertical block and the horizontal block is below, preventing the T-shaped block 31 from being taken out of the chute 210 of the workbench 200 in the vertical direction and increasing the tight fixation between the tooling and the workbench 200. The threaded end of the second hexagon socket head bolt 32 passes through the milling tire base plate 1 and is threadedly connected to the T-shaped block 31. By tightening the second hexagon socket head bolt 32, the T-shaped block 31 and the milling tire base plate 1 are fixed together, ensuring that the milling tire base plate 1 can be firmly fixed on the workbench 200, enabling the workpiece 100 to complete the processing of large-size workpieces 100 on a machine tool with a small stroke and improving the utilization rate of the machine tool. The upper end face of the second hexagon socket head bolt 32 is not higher than the upper end face of the milling tire base plate 1 to prevent interference with the workpiece 100.

[0037] Referring to Figure 3 , the upper end face of the milling tire base plate 1 abuts against the lower end face of the workpiece 100. A circular groove 11 is opened on the upper end face of the milling tire base plate 1. The convex ring 130 on the lower end face of the workpiece 100 is embedded in the circular groove 11. The side wall of the circular groove 11 abuts against the outer wall of the convex ring 130 of the workpiece 100. The convex ring 130 of the workpiece 100 is inserted into the circular groove 11 and is rotationally connected to the milling tire base plate 1 along the axis direction of the circular groove 11. A positioning pin 2 is inserted into the upper end face of the milling tire base plate 1. The axis of the positioning pin 2 is vertically intersected with the center circle of several circular holes 110 on the workpiece 100. The upper end of the positioning pin 2 is located above the circular holes 110 of the workpiece 100. The outer diameter of the part of the positioning pin 2 in the circular holes 110 is the same as the inner diameter of the circular holes 110. The lower end face of the milling tire base plate 1 is provided with a locking assembly 3 fixed to the workbench 200. The lower end face of the milling tire base plate 1 is provided with a flat key 4 adapted to the chute 210 opened on the workbench 200. The lower end of the positioning pin 2 can be chamfered to facilitate insertion into the circular holes 110 and the milling tire base plate 1. Through the above technical solutions, it is realized that the size of the workpiece 100 for processing the waist-shaped hole 120 is not limited by the stroke range of the machine tool, the utilization rate of the machine tool is improved, and the processing accuracy and position accuracy requirements of the waist-shaped hole 120 are ensured.

[0038] The specific usage method of this embodiment is as follows: First, a flat key 4 is snapped into the installation groove 12, and the flat key 4 is fixed to the milling tire bottom plate 1 using the first hexagon socket head bolt 41. The second hexagon socket head bolt 32 is passed through the milling tire bottom plate 1 and is initially threadedly connected to the T-shaped block 31. The T-shaped block 31 is slid along the chute 210 of the workbench 200 to the milling position, and the second hexagon socket head bolt 32 is rotated using a hexagon wrench to tightly connect the milling tire bottom plate 1 to the workbench 200. At this time, the lower end of the flat key 4 is also stuck in the chute 210 of the workbench 200. Subsequently, the workpiece 100 is placed on the milling tire bottom plate 1, the convex ring 130 of the workpiece 100 is stuck in the circular groove 11, and one of the circular holes 110 at the lower end of the workpiece 100 is aligned with the pin hole on the milling tire bottom plate 1 for inserting the positioning pin 2. The positioning pin 2 is inserted downward through the circular hole 110 of the workpiece 100 into the pin hole, making the workpiece 100 unable to rotate. Subsequently, the workpiece 100 is milled using a machine tool. After milling the waist-shaped hole 120 within the stroke range of the machine tool, the positioning pin 2 is taken out, the workpiece 100 is rotated so that another circular hole 110 on the workpiece 100 is aligned with the pin hole, the positioning pin 2 is inserted, and the milling work continues. The operation is repeated until the required waist-shaped hole 120 is processed.

[0039] The implementation principle of this embodiment is: Through the close fit and rotational connection between the milling tire bottom plate 1 and the workpiece 100, the workpiece 100 can be precisely rotated during the processing to meet the processing requirements at different angles, thus avoiding the problem that the workpiece 100 cannot be processed due to its size exceeding the stroke range. The design of the positioning pin 2 ensures the precise positioning of the workpiece 100 after each rotation, further improving the processing accuracy and positional accuracy requirements. The setting of the locking assembly 3 and the flat key 4 enables the milling tire bottom plate 1 to be firmly fixed on the workbench 200, ensuring the stability of the entire processing process, and at the same time facilitating the installation and disassembly of the tooling. The overall structure is simple and reliable, effectively utilizing the existing machine tool resources and improving the use efficiency of the machine tool.

[0040] Embodiment 2 The difference between this embodiment and Embodiment 1 is: adding a device for pressing the milling tire bottom plate 1 and improving the adaptability of the tooling to workpieces 100 of different sizes.

[0041] Refer to Figure 5 and Figure 6, A tooling for solving the problem that the size of workpiece 100 exceeds the stroke range of the machine tool, further including a pressing plate 5. The pressing plate 5 is located above the milling base plate 1 and is used to press the workpiece 100 onto the milling base plate 1. A pressing block 13 is fixedly connected to the bottom surface of the circular groove 11, and the pressing block 13 is located on the axis of the milling base plate 1. The height of the pressing block 13 is lower than the thickness of the workpiece 100 to ensure sufficient pressing force. A pressing bolt 14 is inserted into the pressing plate 5, and the threaded end of the pressing bolt 14 passes through the pressing plate 5 and is threadedly connected to the pressing block 13. The length of the pressing bolt 14 is not greater than the height of the pressing block 13 to ensure sufficient insertion depth and stability. After the pressing block 13 and the pressing bolt 14 are threadedly connected, there is a large margin between the two to adapt to workpieces 100 of different heights, increasing the applicability and flexibility of the tooling. Moreover, the cooperation between the pressing block 13 and the pressing bolt 14 makes the operation of pressing the workpiece 100 simpler and faster, improving work efficiency.

[0042] Refer to Figure 5 and Figure 6 , Slide plates 51 are inserted into two opposite side walls of the pressing plate 5, and the slide plates 51 are slidably connected to the pressing plate 5 along the direction perpendicular to the plane where the side walls into which they are inserted are located. The design of the slide plates 51 can extend the length of the pressing plate 5. When the diameter of the through hole 140 in the middle of the workpiece 100 is greater than the length of the pressing plate 5, pull out the slide plates 51 outward, and turning the fastening bolt 17 will make the lower end surface of the slide plates 51 abut against the workpiece 100, adapting to workpieces 100 with different through hole 140 diameter sizes, increasing the applicability and flexibility of the tooling.

[0043] Refer to Figure 6 and Figure 7 , The milling base plate 1 further includes a snap ring 15. The snap ring 15 is located in the circular groove 11, and the inner wall of the snap ring 15 abuts against the outer wall of the convex ring 130 of the workpiece 100. The inner diameter of the snap ring 15 matches the outer diameter of the convex ring 130 of the workpiece 100, and snap rings 15 with different wall thicknesses can be replaced to adapt to workpieces 100 of different sizes. The snap ring 15 is coaxially arranged with the milling base plate 1. A plurality of grooves 16 are provided on the upper end surface of the milling base plate 1, and fastening bolts 17 are provided in the grooves 16. The threaded ends of the fastening bolts 17 pass through the side wall of the circular groove 11 in the horizontal direction and are threadedly connected to the snap ring 15. The length of the fastening bolt 17 is less than the length of the groove 16 to ensure the installation of the fastening bolt 17. Through the multiple grooves 16 and fastening bolts 17, the connection strength and stability between the snap ring 15 and the milling base plate 1 can be further improved, thereby ensuring the stability and reliability of the workpiece 100 during the processing process.

[0044] Refer to Figure 6 and Figure 7, a positioning groove 18 is radially formed on the upper end surface of the milling tire bottom plate 1. The lower end of the positioning pin 2 is inserted into the positioning groove 18, and the outer wall of the lower end of the positioning pin 2 abuts against the inner wall of the positioning groove 18. The width of the positioning groove 18 matches the outer diameter of the positioning pin 2. When the outer diameter of the workpiece 100 increases or decreases, the position of the circular hole 110 also changes accordingly. When the position of the circular hole 110 changes radially along the milling tire bottom plate 1, the positioning pin 2 can slide radially along the milling tire bottom plate 1 within the positioning groove 18, which can adapt to workpieces 100 with different outer diameters, increasing the applicability and flexibility of the tooling.

[0045] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A tooling for solving the problem that the workpiece size exceeds the machine tool travel range, characterized in that: It includes a milling base plate (1). The upper end face of the milling base plate (1) abuts against the lower end face of the workpiece (100). A circular groove (11) is formed on the upper end face of the milling base plate (1). The side wall of the circular groove (11) abuts against the outer wall of the convex ring (130) of the workpiece (100). The convex ring (130) of the workpiece (100) is inserted into the circular groove (11) and is rotationally connected to the milling base plate (1) along the axial direction of the circular groove (11). A positioning pin (2) is inserted into the upper end face of the milling base plate (1). The axis of the positioning pin (2) is perpendicularly intersected with the circle of several circular holes (110) on the workpiece (100). The upper end of the positioning pin (2) is located above the circular hole (110) of the workpiece (100). The outer diameter of the part of the positioning pin (2) within the circular hole (110) is the same as the inner diameter of the circular hole (110). A locking assembly (3) fixed to the workbench (200) is provided on the lower end face of the milling base plate (1). A flat key (4) adapted to the chute (210) formed on the workbench (200) is provided on the lower end face of the milling base plate (1).

2. The tooling for solving the problem that the workpiece size exceeds the machine tool stroke range according to claim 1, characterized in that: An installation groove (12) is formed on the lower end face of the milling base plate (1). The installation groove (12) runs completely through along the radial direction of the milling base plate (1). The upper end of the flat key (4) is located within the installation groove (12). The side wall of the flat key (4) abuts against the side wall of the installation groove (12). First hexagon socket head cap screws (41) are inserted at both ends of the flat key (4) along the penetrating direction of the installation groove (12). The threaded ends of the first hexagon socket head cap screws (41) pass through the flat key (4) and are threadedly connected to the milling base plate (1). The lower end face of the first hexagon socket head cap screw (41) is not lower than the lower end face of the flat key (4).

3. A tooling for solving the problem that the size of a workpiece exceeds the stroke range of a machine tool according to claim 1, characterized in that: Two groups of the locking assemblies (3) are provided along the penetrating direction of the installation groove (12). The flat key (4) is located between the two groups of locking assemblies (3).

4. A tooling for solving the problem that the size of the workpiece exceeds the stroke range of the machine tool according to claim 1, characterized in that: The locking assembly (3) includes a T-shaped block (31) and a second hexagon socket head cap screw (32). The T-shaped block (31) is located below the milling base plate (1). The T-shaped block (31) is used for sliding in the chute (210) of the workbench (200). The threaded end of the second hexagon socket head cap screw (32) passes through the milling base plate (1) and is threadedly connected to the T-shaped block (31). The upper end face of the second hexagon socket head cap screw (32) is not higher than the upper end face of the milling base plate (1).

5. A tooling for solving the problem that the size of a workpiece exceeds the stroke range of a machine tool according to claim 1, characterized in that: It further includes a pressing plate (5). The pressing plate (5) is located above the milling base plate (1). The pressing plate (5) is used for pressing the workpiece (100) against the milling base plate (1).

6. The fixture for solving the problem that the workpiece size exceeds the machine tool travel range according to claim 5, wherein: A pressing block (13) is fixedly connected to the bottom surface of the circular groove (11). The pressing block (13) is located on the axis of the milling base plate (1). A pressing bolt (14) is inserted into the pressing plate (5). The threaded end of the pressing bolt (14) passes through the pressing plate (5) and is threadedly connected to the pressing block (13).

7. A tooling for solving the problem that the size of a workpiece exceeds the stroke range of a machine tool according to claim 5, characterized in that: Sliding plates (51) are inserted into two opposite side walls of the pressing plate (5). The sliding plates (51) are slidably connected to the pressing plate (5) along the direction perpendicular to the plane of the side wall where they are inserted.

8. A tooling for solving the problem that the workpiece size exceeds the machine tool stroke range according to claim 1, characterized in that: The milling base plate (1) includes a snap ring (15). The snap ring (15) is located in the circular groove (11). The inner wall of the snap ring (15) abuts against the outer wall of the convex ring (130) of the workpiece (100). The snap ring (15) is coaxially arranged with the milling base plate (1). A plurality of grooves (16) are formed in the upper end surface of the milling base plate (1). A fastening bolt (17) is arranged in the groove (16). The threaded end of the fastening bolt (17) passes through the side wall of the circular groove (11) in the horizontal direction and is threadedly connected with the snap ring (15). A positioning groove (18) is formed in the upper end surface of the milling base plate (1) along its radial direction. The lower end of the positioning pin (2) is inserted into the positioning groove (18). The outer wall of the lower end of the positioning pin (2) abuts against the inner wall of the positioning groove (18).

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