Multi-station fixture for numerical control machine tool

Abstract

The application discloses a multi-station clamp for numerical control machine tools and belongs to the technical field of numerical control machine tool clamps, which comprises a movable base, the lower end of the movable base is provided with a multi-station synchronous clamping mechanism for fixing the outer walls of multiple groups of conical workpieces, the multi-station synchronous clamping mechanism comprises a moving assembly, a synchronous moving assembly and an adaptive clamping assembly, a plurality of adaptive clamping assemblies are installed on the synchronous moving assembly, and a plurality of adaptive inner supporting mechanisms are installed on the upper end of the movable base in a linear equal-interval mode. Through the above mode, the adaptive clamping assemblies are in abutment with the outer walls of the conical hollow workpieces, and the second deformation assembly and the adaptive clamping assembly are matched, so that adaptive centering and fixing of conical hollow workpieces of different sizes can be realized.

Description

Technical Field

[0001] This invention relates to the field of CNC machine tool fixture technology, and specifically to a multi-station fixture for CNC machine tools. Background Technology

[0002] Machine tool fixtures are devices used to clamp workpieces and guide cutting tools on machine tools, and are widely used in machining processes. Their core function is to determine the correct position of the workpiece within the fixture by having locating elements contact the workpiece's locating reference, thereby ensuring the accurate geometric relationship of the workpiece's movement relative to the cutting tool and machine tool during machining.

[0003] Chinese patent CN115846994A discloses a welding fixture assembly for a conical screen flange, including an upper mounting plate. An upper mold is fixedly connected to the center of the upper mounting plate. Limiting slide rails are slidably connected to both sides of the upper mounting plate. A mounting base plate is fixedly connected to the bottom of the limiting slide rails. A rotating table is driven to the upper end of the mounting base plate. A bottom mold is fixedly connected to the upper end of the rotating table. An automatic feeding structure is installed at the center of the bottom mold. The automatic feeding structure includes a protective plate, a telescopic cylinder, a baffle plate, and a feeding communication component. A telescopic cylinder is installed at the front center of the protective plate. The lower end of the telescopic cylinder is telescopically connected to the baffle plate. A feeding communication component is fixedly provided at the center of the protective plate, the telescopic cylinder, and the baffle plate. However, this device still has the following problems during use: The device can only clamp conical workpieces of the same size. When it is necessary to clamp workpieces of different sizes, the corresponding clamping components need to be replaced, resulting in low processing efficiency.

[0004] Based on this, the present invention designs a multi-station fixture for CNC machine tools to solve the above problems. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides a multi-station fixture for CNC machine tools.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A multi-station fixture for CNC machine tools includes a movable base, a multi-station synchronous clamping mechanism, and an adaptive internal support mechanism; the lower end of the movable base is equipped with a fixed multi-station synchronous clamping mechanism for clamping the outer walls of multiple sets of conical workpieces. The multi-station synchronous clamping mechanism includes a moving component, a synchronous moving component, and an adaptive clamping component; the moving component is installed at the lower end of the movable base; multiple sets of synchronous moving components are installed linearly and at equal intervals on the moving component; and the synchronous moving components are also connected to the movable base. Multiple sets of adaptive clamping components are installed on the synchronous moving component; Multiple adaptive internal support mechanisms are installed linearly and at equal intervals on the upper end of the movable base to perform adaptive internal support operations on the inner walls of conical workpieces of different sizes. Furthermore, the adaptive internal support mechanism includes a fixed shaft, an upper support assembly, and a lower support assembly; the fixed shaft is fixedly installed on the upper end of the movable base; the upper support assembly is installed on the upper side of the fixed shaft; and the lower support assembly is installed on the lower side of the fixed shaft. Both the upper support assembly and the lower support assembly include a fixed plate, a first deformation assembly, and a second deformation assembly; A fixed plate is fixedly installed on the outer end of a fixed shaft; multiple sets of first deformation components are installed in a rectangular array on the side end of the fixed plate; a second deformation component is connected to the first deformation component; In the initial state, the first deformation component and the second deformation component are in a horizontal state; Furthermore, the moving component includes a vertical push cylinder, a movable plate, and vertical guide rods; the vertical push cylinder is fixedly installed at the lower middle part of the movable base; the output end of the vertical push cylinder is fixedly connected to the movable plate; multiple vertical guide rods are fixedly installed in a rectangular array at the lower end of the movable base; the movable plate and the vertical guide rods are in a limited sliding connection. The movable board is connected to the synchronous moving component; Furthermore, the synchronous movement assembly includes a fixed base, a push rod, a movable plate, and a sliding block; the fixed base is fixedly mounted on the upper end of the movable plate in a rectangular array; the lower end of the push rod is hinged to the fixed base; the upper end of the push rod is hinged to the lower end of the movable plate; a clearance groove is formed in a rectangular array in the middle of the movable base; the movable plate is located inside the clearance groove; symmetrical sliding grooves are formed on the inner walls of both sides of the clearance groove; the sliding block is limited and slidably connected to the sliding groove; the two sides of the middle of the movable plate are fixedly connected to the sliding block; the movable plate is slidably connected to the clearance groove. The movable plate is connected to the adaptive clamping assembly; Furthermore, the adaptive clamping assembly includes a C-shaped rotating plate, a first connecting shaft, and a first torsion spring; the first connecting shaft is rotatably connected to the upper side of the movable plate; the first torsion spring is wound around the first connecting shaft; one end of the first torsion spring is fixedly connected to the first connecting shaft; the other end of the first torsion spring is fixedly connected to the movable plate. A C-shaped rotating plate is fixedly installed in the middle of the first connecting shaft; Furthermore, the first torsion spring ensures that the C-shaped rotating plate always tends to remain vertical. Furthermore, the upper length of the C-shaped rotating plate is greater than the lower length; Furthermore, the first deformation component includes a U-shaped fixing block, a second connecting shaft, a supporting rotating plate, and a second torsion spring; the U-shaped fixing block is fixedly installed on the side end of the fixing plate; the second connecting shaft is rotatably connected to the U-shaped fixing block; the second torsion spring is wound around the second connecting shaft; one end of the second torsion spring is fixedly connected to the second connecting shaft; the other end of the second torsion spring is fixedly connected to the U-shaped fixing block; the middle part of the second connecting shaft is fixedly connected to one end of the supporting rotating plate. The other end of the supporting rotating plate is connected to the second deformation component; Furthermore, the second torsion spring ensures that the supporting rotating plate always tends to remain horizontal. Furthermore, the second deformation assembly includes an inner support plate, a third connecting shaft, and a third torsion spring; the third connecting shaft is rotatably connected to the other end of the supporting rotating plate; the third torsion spring is wound around the third connecting shaft, one end of the third torsion spring is fixedly connected to the third connecting shaft; the other end of the third torsion spring is fixedly connected to the supporting rotating plate. The upper end of the inner support plate is provided with a rotation relief groove; the two ends of the third connecting shaft are fixedly connected to the inner walls of the two sides of the rotation relief groove. The third torsion spring ensures that the inner support plate always tends to remain horizontal.

[0007] Compared with the prior art, the beneficial effects of this invention are as follows: 1. The conical hollow workpiece to be processed is inserted downward along a fixed axis. During the movement, the inner wall of the conical hollow workpiece will contact the second deformation component of the lower support component and the upper support component in sequence, thereby causing the first deformation component to bend downward and the second deformation component to remain in contact with the inner wall of the conical hollow workpiece. At the same time, the operation of the moving component drives the operation of multiple sets of synchronous moving components, which in turn drive the adaptive clamping component to move towards the conical hollow workpiece. During the movement, the adaptive clamping component will contact the outer wall of the conical hollow workpiece until all the adaptive clamping components are pressed against the outer wall of the conical hollow workpiece. At this time, the second deformation component and the adaptive clamping component cooperate to achieve adaptive centering and fixing of conical hollow workpieces of different sizes. 2. By cooperating with the moving components and synchronous moving components, the device can clamp and fix multiple conical workpieces with a single drive, which reduces manufacturing costs and also reduces the energy consumption of the device. Attached Figure Description

[0008] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0009] Figure 1 This invention relates to a three-dimensional multi-station fixture for CNC machine tools. Figure 1 ; Figure 2 This is a front view of a multi-station fixture for CNC machine tools according to the present invention; Figure 3 This invention relates to a three-dimensional multi-station fixture for CNC machine tools. Figure 2 ; Figure 4 This invention relates to a three-dimensional multi-station fixture for CNC machine tools. Figure 3 ; Figure 5 for Figure 3 Enlarged view of point A in the middle; Figure 6 This is a perspective view of a multi-station fixture for CNC machine tools according to the present invention, with a portion of the front cut off. Figure 7 This is a top view of a multi-station fixture for CNC machine tools according to the present invention.

[0010] The labels in the diagram represent: 1. Movable base; 2. Multi-station synchronous clamping mechanism; 21. Vertical push cylinder; 22. Movable plate; 23. Vertical guide rod; 24. Fixed seat; 25. Push rod; 26. Moving plate; 27. Clearance groove; 28. Moving slide; 29. ​​Sliding block; 210. C-shaped rotating plate; 211. First connecting shaft; 212. First torsion spring; 3. Adaptive internal support mechanism; 31. Fixed shaft; 32. Fixed plate; 33. U-shaped fixed block; 34. Second connecting shaft; 35. Support rotating plate; 36. Second torsion spring; 37. Internal support plate; 371. Rotation clearance groove; 38. Third connecting shaft; 39. Third torsion spring. Detailed Implementation

[0011] 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, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0012] The terms "left," "right," "front," "back," "up," and "down" used in the following description refer to the orientation from the perspective of the front view.

[0013] Example 1: In some embodiments, please refer to the accompanying drawings. Figures 1-7A multi-station fixture for CNC machine tools includes a movable base 1, a multi-station synchronous clamping mechanism 2, and an adaptive internal support mechanism 3; the lower end of the movable base 1 is equipped with the multi-station synchronous clamping mechanism 2 for fixing the outer walls of multiple sets of conical workpieces. The multi-station synchronous clamping mechanism 2 includes a moving component, a synchronous moving component, and an adaptive clamping component; the moving component is installed at the lower end of the movable base 1; multiple sets of synchronous moving components are installed linearly and at equal intervals on the moving component; and the synchronous moving component is also connected to the movable base 1. Multiple sets of adaptive clamping components are installed on the synchronous moving component; Multiple sets of adaptive internal support mechanisms 3 are installed linearly and at equal intervals on the upper end of the active base 1 to perform adaptive internal support operations on the inner walls of conical workpieces of different sizes. The adaptive internal support mechanism 3 includes a fixed shaft 31, an upper support assembly, and a lower support assembly; the fixed shaft 31 is fixedly installed on the upper end of the movable base 1; the upper support assembly is installed on the upper side of the fixed shaft 31; and the lower support assembly is installed on the lower side of the fixed shaft 31. Both the upper support assembly and the lower support assembly include a fixed plate 32, a first deformation assembly, and a second deformation assembly; The fixed plate 32 is fixedly installed on the outer end of the fixed shaft 31; multiple sets of first deformation components are installed in a rectangular array on the side end of the fixed plate 32; the second deformation component is connected to the first deformation component; In the initial state, the first deformation component and the second deformation component are in a horizontal state; In this invention, the conical hollow workpiece to be processed is inserted downward along the fixed shaft 31. During the movement, the inner wall of the conical hollow workpiece will contact the second deformation component of the lower support component and the upper support component in sequence, thereby causing the first deformation component to bend downward and the second deformation component to remain in contact with the inner wall of the conical hollow workpiece. At the same time, the operation of the moving component drives the operation of multiple sets of synchronous moving components, which in turn drive the adaptive clamping component to move towards the conical hollow workpiece. During the movement, the adaptive clamping component will contact the outer wall of the conical hollow workpiece until all the adaptive clamping components are pressed against the outer wall of the conical hollow workpiece. At this time, the second deformation component and the adaptive clamping component cooperate to achieve adaptive centering and fixing of conical hollow workpieces of different sizes. By combining the moving components and the synchronous moving components, the device can clamp and fix multiple conical workpieces with a single drive, which reduces manufacturing costs and also reduces the energy consumption of the device.

[0014] Example 2: In some embodiments, such as Figures 1-7As shown, in a preferred embodiment of the present invention, the moving component includes a vertical push cylinder 21, a movable plate 22, and a vertical guide rod 23; the vertical push cylinder 21 is fixedly installed in the middle of the lower end of the movable base 1; the output end of the vertical push cylinder 21 is fixedly connected to the movable plate 22; a plurality of vertical guide rods 23 are fixedly installed in a rectangular array at the lower end of the movable base 1; the movable plate 22 and the vertical guide rods 23 are in a limited sliding connection. The movable plate 22 is connected to the synchronous movement component; The synchronous movement assembly includes a fixed base 24, a push rod 25, a movable plate 26, and a sliding block 29. The fixed base 24 is fixedly mounted on the upper end of the movable plate 22 in a rectangular array. The lower end of the push rod 25 is hinged to the fixed base 24. The upper end of the push rod 25 is hinged to the lower end of the movable plate 26. The middle part of the movable base 1 has a rectangular array of clearance grooves 27. The movable plate 26 is located inside the clearance grooves 27. The inner walls of both sides of the clearance grooves 27 are symmetrically provided with sliding grooves 28. The sliding block 29 is slidably connected to the sliding grooves 28. The middle two sides of the movable plate 26 are fixedly connected to the sliding block 29. The movable plate 26 is slidably connected to the clearance grooves 27. The movable plate 26 is connected to the adaptive clamping assembly. The adaptive clamping assembly includes a C-shaped rotating plate 210, a first connecting shaft 211, and a first torsion spring 212; the first connecting shaft 211 is rotatably connected to the upper side of the movable plate 26; the first torsion spring 212 is wound around the first connecting shaft 211; one end of the first torsion spring 212 is fixedly connected to the first connecting shaft 211; the other end of the first torsion spring 212 is fixedly connected to the movable plate 26. A C-shaped rotating plate 210 is fixedly installed in the middle of the first connecting shaft 211; The first torsion spring 212 ensures that the C-shaped rotating plate 210 always tends to remain vertical. The upper length of the C-shaped rotating plate 210 is greater than the lower length; In this invention, when the second deformation component abuts against the inner wall of the conical hollow workpiece, the vertical push cylinder 21 pushes the movable plate 22 downward along the vertical guide rod 23, and drives the fixed seat 24 downward. The downward movement of the fixed seat 24 pushes the lower end of the push rod 25 downward, thereby causing the push rod 25 to pull the movable plate 26 to follow the sliding block 29 along the movable groove 28 towards the conical hollow workpiece. During the movement, the upper side of the C-shaped rotating plate 210 is longer, while the upper outer diameter of the conical hollow workpiece is smaller. When the upper side of the C-shaped rotating plate 210 touches the upper side of the conical hollow workpiece, it will follow the first connecting shaft 211 to rotate downward around the hinge point with the movable plate 26 and continuously compress the first torsion spring 212, thereby causing the lower side of the C-shaped rotating plate 210 to move away from the conical hollow workpiece, so that the upper and lower sides of the C-shaped rotating plate 210 are in an inclined state and abut against the outer wall of the conical hollow workpiece.

[0015] Example 3: In some embodiments, such as Figures 1-7 As shown, in a preferred embodiment of the present invention, the first deformation component includes a U-shaped fixing block 33, a second connecting shaft 34, a supporting rotating plate 35, and a second torsion spring 36; the U-shaped fixing block 33 is fixedly installed on the side end of the fixing plate 32; the second connecting shaft 34 is rotatably connected to the U-shaped fixing block 33; the second torsion spring 36 is wound around the second connecting shaft 34; one end of the second torsion spring 36 is fixedly connected to the second connecting shaft 34; the other end of the second torsion spring 36 is fixedly connected to the U-shaped fixing block 33; the middle part of the second connecting shaft 34 is fixedly connected to one end of the supporting rotating plate 35. The second torsion spring 36 ensures that the supporting rotating plate 35 always tends to remain horizontal. The other end of the supporting rotating plate 35 is connected to the second deformation component; The second deformation assembly includes an inner support plate 37, a third connecting shaft 38, and a third torsion spring 39; the third connecting shaft 38 is rotatably connected to the other end of the supporting rotating plate 35; the third torsion spring 39 is wound around the third connecting shaft 38, one end of the third torsion spring 39 is fixedly connected to the third connecting shaft 38; the other end of the third torsion spring 39 is fixedly connected to the supporting rotating plate 35. The upper end of the inner support plate 37 is provided with a rotation relief groove 371; the two ends of the third connecting shaft 38 are fixedly connected to the inner walls of both sides of the rotation relief groove 371. The third torsion spring 39 ensures that the inner support plate 37 always tends to remain horizontal. In this invention, the conical hollow workpiece to be processed is inserted downward along the fixed shaft 31. During the movement, the inner wall of the conical hollow workpiece will contact the upper end of the inner support plate 37 of the lower support assembly and the upper support assembly in sequence. As a result, the inner support plate 37 follows the third connecting shaft 38 to rotate downward around the hinge point with the support rotating plate 35 and continuously compresses the third torsion spring 39, so that the upper end of the inner support plate 37 abuts against the inner wall of the conical hollow workpiece. As the conical hollow workpiece continues to move downward, it will also drive the support rotating plate 35 to follow the second connecting shaft 34 to rotate downward around the hinge point with the U-shaped fixed block 33 and continuously compress the second torsion spring 36, thereby causing the inner support plate 37 to further press against the inner wall of the conical hollow workpiece.

[0016] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A multi-station fixture for CNC machine tools, comprising a movable base (1), characterized in that: It also includes a multi-station synchronous clamping mechanism (2) and an adaptive internal support mechanism (3); the lower end of the movable base (1) is equipped with a multi-station synchronous clamping mechanism (2) for fixing the outer wall of multiple sets of conical workpieces. The multi-station synchronous clamping mechanism (2) includes a moving component, a synchronous moving component, and an adaptive clamping component; the moving component is installed at the lower end of the movable base (1); multiple sets of synchronous moving components are installed on the moving component at linear and equal intervals; and the synchronous moving component is also connected to the movable base (1); Multiple sets of adaptive clamping components are installed on the synchronous moving component; Multiple adaptive internal support mechanisms (3) are installed at linear and equal intervals on the upper end of the movable base (1) to perform adaptive internal support operations on the inner wall of conical workpieces of different sizes. The adaptive internal support mechanism (3) includes a fixed shaft (31), an upper support assembly, and a lower support assembly; the fixed shaft (31) is fixedly installed on the upper end of the movable base (1); the upper support assembly is installed on the upper side of the fixed shaft (31); and the lower support assembly is installed on the lower side of the fixed shaft (31). Both the upper support assembly and the lower support assembly include a fixed plate (32), a first deformation assembly, and a second deformation assembly; The fixed plate (32) is fixedly installed on the outer end of the fixed shaft (31); multiple sets of first deformation components are installed in a rectangular array on the side end of the fixed plate (32); the second deformation component is connected to the first deformation component; In the initial state, the first deformation component and the second deformation component are in a horizontal state.

2. The multi-station fixture for CNC machine tools according to claim 1, characterized in that, The moving component includes a vertical push cylinder (21), a movable plate (22), and a vertical guide rod (23); the vertical push cylinder (21) is fixedly installed in the middle of the lower end of the movable base (1); the output end of the vertical push cylinder (21) is fixedly connected to the movable plate (22); multiple vertical guide rods (23) are fixedly installed in a rectangular array at the lower end of the movable base (1); the movable plate (22) and the vertical guide rods (23) are in a limited sliding connection; The active board (22) is connected to the synchronous moving component.

3. The multi-station fixture for CNC machine tools according to claim 2, characterized in that, The synchronous moving assembly includes a fixed base (24), a push rod (25), a moving plate (26), and a sliding block (29); the fixed base (24) is fixedly installed in a rectangular array on the upper end of the movable plate (22); the lower end of the push rod (25) is hinged to the fixed base (24); the upper end of the push rod (25) is hinged to the lower end of the moving plate (26); the middle part of the movable base (1) is provided with a rectangular array of clearance grooves (27); the moving plate (26) is located inside the clearance groove (27); the inner walls of the clearance groove (27) are symmetrically provided with moving slide grooves (28); the sliding block (29) is limited and slidably connected to the moving slide groove (28); the middle two sides of the moving plate (26) are fixedly connected to the sliding block (29); the moving plate (26) is fitted and slidably connected to the clearance groove (27); The movable plate (26) is connected to the adaptive clamping assembly.

4. The multi-station fixture for CNC machine tools according to claim 3, characterized in that, The adaptive clamping assembly includes a C-shaped rotating plate (210), a first connecting shaft (211), and a first torsion spring (212); the first connecting shaft (211) is rotatably connected to the upper side of the movable plate (26); the first torsion spring (212) is wound around the first connecting shaft (211); one end of the first torsion spring (212) is fixedly connected to the first connecting shaft (211); the other end of the first torsion spring (212) is fixedly connected to the movable plate (26); A C-shaped rotating plate (210) is fixedly installed in the middle of the first connecting shaft (211).

5. The multi-station fixture for CNC machine tools according to claim 4, characterized in that, The first torsion spring (212) ensures that the C-shaped rotating plate (210) always tends to remain vertical.

6. The multi-station fixture for CNC machine tools according to claim 5, characterized in that, The upper length of the C-shaped rotating plate (210) is greater than the lower length.

7. The multi-station fixture for CNC machine tools according to claim 4, characterized in that, The first deformation component includes a U-shaped fixing block (33), a second connecting shaft (34), a supporting rotating plate (35), and a second torsion spring (36); the U-shaped fixing block (33) is fixedly installed on the side end of the fixing plate (32); the second connecting shaft (34) is rotatably connected to the U-shaped fixing block (33); the second torsion spring (36) is wound around the second connecting shaft (34); one end of the second torsion spring (36) is fixedly connected to the second connecting shaft (34); the other end of the second torsion spring (36) is fixedly connected to the U-shaped fixing block (33); the middle part of the second connecting shaft (34) is fixedly connected to one end of the supporting rotating plate (35); The other end of the supporting rotating plate (35) is connected to the second deformation component.

8. The multi-station fixture for CNC machine tools according to claim 7, characterized in that, The second torsion spring (36) ensures that the supporting rotating plate (35) always tends to remain horizontal.

9. The multi-station fixture for CNC machine tools according to claim 8, characterized in that, The second deformation assembly includes an inner support plate (37), a third connecting shaft (38), and a third torsion spring (39); the third connecting shaft (38) is rotatably connected to the other end of the supporting rotating plate (35); the third torsion spring (39) is wound around the third connecting shaft (38), one end of the third torsion spring (39) is fixedly connected to the third connecting shaft (38); the other end of the third torsion spring (39) is fixedly connected to the supporting rotating plate (35); The upper end of the inner support plate (37) is provided with a rotation relief groove (371); the two ends of the third connecting shaft (38) are fixedly connected to the inner walls of the two sides of the rotation relief groove (371); The third torsion spring (39) ensures that the inner support plate (37) always tends to remain horizontal.

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