High-precision swing rotary table for five-axis machine tool

Abstract

The utility model discloses a high accuracy swing rotary worktable for five -axis machine tool, including the rotary table body, the seat board bottom of rotary table body is integrative with the base, still include the resistance limit mechanism, the resistance limit mechanism includes the resistance strip, the base link board, the electric pushrod, the L shape folding board, the base dress board, the side mouth support leg and the flange nut, through setting the resistance limit mechanism at the rotary table body of five -axis machine tool, when swing platform body installation clamp of rotary table body clamps workpiece and rotates to the processing angle, the electric pushrod of resistance limit mechanism can promote the base link board and go up and stretch, make the resistance strip and go out the guide groove and prop up swing platform body, when facing big cutting capacity or high hardness material processing, provide the support force additionally, shared the cutting force that bearing and transmission structure bore, effectively restrain the little shift of rotary table, avoid the workpiece size out of tolerance caused by rotary table shift, thereby guarantee the high accuracy processing of workpiece.

Description

Technical Field

[0001] This utility model relates to the field of machine tool accessories technology, and in particular to a high-precision swing rotary table for a five-axis machine tool. Background Technology

[0002] A five-axis machine tool is a high-precision CNC machine tool that can simultaneously control the linkage motion of five coordinate axes (usually including three linear coordinate axes and two rotary coordinate axes). Its core advantage lies in its ability to overcome the machining limitations of traditional three-axis machine tools (only X, Y, and Z linear axes), enabling "one-time clamping and multi-face machining" of complex curved surfaces and irregularly shaped workpieces, greatly improving machining accuracy, efficiency, and process flexibility. To meet the needs of high-precision machining, five-axis machine tools usually use cradle-type five-axis rotary tables. Cradle-type five-axis rotary tables are the most commonly used "workpiece posture adjustment components" in five-axis machine tools. They are named for their "cradle"-like structure. Their core is to drive the workpiece clamped on the table to swing (rotate around one axis) and rotate (rotate around another axis) through "dual rotary axis linkage," which works in conjunction with the linear axes of the machine tool to complete complex machining.

[0003] In existing cradle-type five-axis rotary tables, when installed on a five-axis machine tool for assembling fixtures to clamp workpieces for machining, the rotary table itself relies on bearings and transmission structures to bear the cutting force. However, the rigidity of these components is limited. When machining materials with large cutting volumes or high hardness, relying solely on its own transmission structure cannot guarantee the stability of the rotary table after displacement. The cutting force will cause slight displacement of the rotary table, which will directly cause the workpiece dimensions to exceed tolerances and affect the workpiece machining accuracy on the five-axis machine tool. To address this, we propose a high-precision oscillating rotary table for five-axis machine tools. Utility Model Content

[0004] The main objective of this invention is to provide a high-precision oscillating rotary table for a five-axis machine tool. By setting a limiting mechanism on the rotary table body of the five-axis machine tool, when the workpiece is held in the oscillating table body by the fixture and rotated to the machining angle, the electric push rod of the limiting mechanism can push the base plate upward, so that the limiting bar passes through the guide groove to support the oscillating table body. When facing the machining of large cutting volume or high hardness materials, it provides additional support force, shares the cutting force borne by the bearing and transmission structure, effectively suppresses the small displacement of the rotary table, avoids the workpiece dimensional deviation caused by the displacement of the rotary table, and thus ensures the high-precision machining of the workpiece. It can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A high-precision oscillating rotary table for a five-axis machine tool includes a rotary table body. The bottom of the rotary table body's base plate is integrally formed with a base. The table also includes a limiting mechanism, which comprises a stop bar, a base connecting plate, an electric actuator, an L-shaped folding plate, a base mounting plate, side support legs, and a flange nut. Symmetrical guide grooves for mounting the stop bar are provided at the center of the base plate. An integral base connecting plate is formed between the bottom strips of the stop bar extending downwards from the guide grooves. The lower surface of the base connecting plate is mounted on the top of the telescopic frame plate of the electric actuator. The housing of the electric actuator is bolted to the inner corner plate of the L-shaped folding plate. The L-shaped folding plate is welded to the surface of the base mounting plate. Threaded guide posts are welded at four points on the upper surface of the base mounting plate. The threaded guide posts are installed to the side support legs via flange nuts, and the side support legs are welded to the lower surface of the base. Recessed holes are provided on the surface of the base mounting plate between the threaded guide posts.

[0006] Furthermore, the height of the abutment bar is greater than the depth of the guide groove cavity, and the guide groove is opened through the surface of the central seat plate of the base; By adopting the above technical solution, the abutment bar can extend upward from the guide groove, thereby allowing the abutment bar to pass through the base and abut against the swing platform of the turntable body to limit its movement.

[0007] Furthermore, a T-shaped hole is recessed on the upper surface of the base plate, and a bolt is screwed between the T-shaped hole and the mounting hole at the top of the telescopic frame plate of the electric actuator, with the head of the bolt hidden in the large cavity of the T-shaped hole. By adopting the above technical solution, bolts can be screwed through the T-shaped hole of the base connecting plate and locked to the top of the telescopic frame plate of the electric actuator, while the head of the bolt can be hidden inside the T-shaped hole of the base connecting plate.

[0008] Furthermore, a mounting hole is provided between the vertical housing of the electric actuator and the L-shaped folding plate, and a bolt is screwed between the electric actuator and the mounting hole of the L-shaped folding plate; By adopting the above technical solution, the vertical housing of the electric actuator and the mounting hole of the L-shaped folding plate can be locked together with bolts.

[0009] Furthermore, the base plate of the side support leg is provided with a through hole for the threaded guide post to pass through, and a flange nut is screwed onto the post body of the threaded guide post that passes through the through hole. By adopting the above technical solution, the side support leg is fitted through the support hole on the outside of the threaded guide post, and then a flange nut can be screwed into the threaded guide post inside the side support leg for locking connection.

[0010] Furthermore, the surface of the base plate is provided with a U-shaped groove for recessed holes, and a through hole is provided at the U-shaped groove for the recessed holes to penetrate the base plate. By adopting the above technical solution, the base plate has recessed holes on its surface, through which mounting bolts of the turntable body can pass for installation on a five-axis machine tool.

[0011] Compared with the prior art, the present invention has the following beneficial effects: This utility model provides a limiting mechanism on the rotary table body of a five-axis machine tool. When the workpiece is held by the fixture on the swing table body of the rotary table body and rotated to the machining angle, the electric push rod of the limiting mechanism can push the base plate upward, so that the limiting bar passes through the guide groove to support the swing table body. When facing the machining of large cutting volume or high hardness materials, it provides additional support force, shares the cutting force borne by the bearing and transmission structure, effectively suppresses the small displacement of the rotary table, avoids the workpiece size deviation caused by the displacement of the rotary table, and thus ensures the high precision machining of the workpiece. Furthermore, when the swing platform of the turntable body needs to be repositioned, the electric push rod can pull the abutment bar down and hide in the guide groove, without affecting the flexible rotation of the turntable. This ensures the stability of the turntable body during processing without restricting the normal swing and rotation function of the turntable, thus achieving a balance between the stability and flexibility of the turntable body. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a high-precision swing rotary table for a five-axis machine tool according to the present invention.

[0013] Figure 2 This is a schematic diagram showing the disassembled threaded guide post and side support leg of a high-precision swing rotary table for a five-axis machine tool according to this utility model.

[0014] Figure 3 This is an exploded view of the limiting mechanism of a high-precision swing rotary table for a five-axis machine tool according to this utility model.

[0015] In the diagram: 1. Turntable body; 2. Base; 3. Limiting mechanism; 4. Guide groove; 5. Support bar; 6. Base connecting plate; 7. Electric actuator; 8. L-shaped folding plate; 9. Base mounting plate; 10. Threaded guide post; 11. Side support leg; 12. Flange nut; 13. Recessed hole. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] like Figure 1-3As shown, a high-precision oscillating rotary table for a five-axis machine tool includes a rotary table body 1. A base 2 is integrally formed on the bottom of the base plate of the rotary table body 1. It also includes a limiting mechanism 3, which comprises a stop bar 5, a base connecting plate 6, an electric actuator 7, an L-shaped folding plate 8, a base mounting plate 9, side support legs 11, and a flange nut 12. The base 2 has symmetrically formed guide grooves 4 for mounting the stop bar 5 at its central base plate. The base connecting plate 6 is integrally formed between the bottom strips of the stop bar 5 extending downwards from the guide grooves 4. The lower plate of the base plate 6 is installed on the top of the telescopic frame plate of the electric push rod 7, and the housing of the electric push rod 7 is locked to the inner corner plate of the L-shaped folding plate 8 by bolts. The L-shaped folding plate 8 is welded to the plate surface of the base plate 9, and threaded guide posts 10 are welded at four points on the upper plate surface of the base plate 9. The threaded guide posts 10 are installed with the side support legs 11 by flange nuts 12, and the side support legs 11 are welded to the lower seat surface of the base 2. The base plate 9 surface between the threaded guide posts 10 has recessed holes 13.

[0018] Wherein, the height of the abutment bar 5 is greater than the depth of the guide groove 4, and the guide groove 4 is opened through the surface of the central seat plate of the base 2. By adopting the above technical solution, the abutment bar 5 can extend upward from the guide groove 4, so that the abutment bar 5 can pass through the base 2 and abut against the swing platform of the turntable body 1 to limit its movement.

[0019] The base plate 6 has a T-shaped hole recessed on its upper surface, and a bolt is screwed between the T-shaped hole and the mounting hole at the top of the telescopic frame plate of the electric push rod 7, with the head of the bolt hidden in the large cavity of the T-shaped hole. By adopting the above technical solution, bolts can be screwed through the T-shaped hole of the base connecting plate 6 and locked to the top of the telescopic frame plate of the electric push rod 7, while the head of the bolt can be hidden in the T-shaped hole of the base connecting plate 6.

[0020] The electric actuator 7 has a mounting hole between its vertical housing and the L-shaped folding plate 8, and a bolt is screwed between the electric actuator 7 and the mounting hole of the L-shaped folding plate 8. By adopting the above technical solution, the vertical housing of the electric actuator 7 and the mounting hole of the L-shaped folding plate 8 can be locked together by screwing bolts.

[0021] The side support leg 11 has a through hole for the threaded guide post 10 to pass through its base plate, and a flange nut 12 is screwed onto the column of the threaded guide post 10 that passes through the support hole. By adopting the above technical solution, the side support leg 11 is sleeved on the outside of the threaded guide post 10 through the support hole, and then the flange nut 12 can be screwed into the threaded guide post 10 inside the side support leg 11 for locking connection.

[0022] The base plate 9 has a U-shaped groove with recessed holes 13 on its surface, and a through hole is provided in the U-shaped groove of the recessed holes 13 to penetrate the base plate 9. By adopting the above technical solution, the base plate 9 has recessed holes 13 on its surface, through which the mounting bolts of the turntable body 1 can pass for installation on the five-axis machine tool.

[0023] It should be noted that this utility model is a high-precision swing rotary table for a five-axis machine tool. By setting a limiting mechanism 3 at the turntable body 1, the base connecting plate 6 of the limiting mechanism 3 is locked to the top of the telescopic frame plate of the electric push rod 7 with bolts. Then the electric push rod 7 can be inserted into the L-shaped folding plate 8 and locked with bolts. At this time, the base 2 of the turntable body 1 can press against the surface of the base plate 9, so that the side support leg 11 passes through the support hole and is sleeved on the outside of the threaded guide post 10. Then, the flange nut 12 can be screwed into the threaded guide post 10 in the side support leg 11 for locking connection. At this time, the abutment bar 5 above the base connecting plate 6 can be inserted into the guide groove 4. Then the base plate 9 with the recessed mounting hole 13 can be installed in the same way as the existing cradle-type five-axis turntable on the five-axis machine tool. The electric push rod 7 can be connected to the control box of the five-axis machine tool for power control as required under the guidance of the manufacturer's electrical technicians, so that the electric push rod 7 can be controlled by the control system of the five-axis machine tool. When the workpiece is clamped by the fixture installed on the surface of the swing table of the rotary table body 1 and rotated to the machining angle, the electric push rod 7 can push the base connecting plate 6 upward. At this time, the abutment bar 5 can pass through the guide groove 4 to support and limit the swing table of the rotary table body 1, ensuring that the swing table of the rotary table body 1 is not prone to slight displacement when subjected to force, thus ensuring high-precision machining of the workpiece. When the swing table of the rotary table body 1 needs to be displaced, the electric push rod 7 can pull the abutment bar 5 down and hide it in the guide groove 4, restoring the flexible rotation of the rotary table body 1. The prototype of the rotary table body 1 of this utility model is a cradle-type five-axis rotary table accessory for a five-axis machine tool, and this utility model is an improvement on it.

[0024] It should be noted that this utility model is a high-precision swing rotary table for a five-axis machine tool. All components in this utility model are known to those skilled in the art, and their structure and principle can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0025] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A high-precision oscillating rotary table for a five-axis machine tool, comprising a rotary table body (1), wherein a base (2) is integrally formed on the bottom of the base plate of the rotary table body (1), characterized in that: It also includes a limiting mechanism (3), which includes a retaining bar (5), a base connecting plate (6), an electric push rod (7), an L-shaped folding plate (8), a base mounting plate (9), a side support leg (11), and a flange nut (12). The base (2) has symmetrically provided guide grooves (4) for mounting the retaining bar (5) at the center of the base plate. The base connecting plate (6) is integrally formed between the bottom strip of the retaining bar (5) extending downward from the guide groove (4). The lower plate of the base connecting plate (6) is mounted on the telescopic frame plate of the electric push rod (7). At the top, the housing of the electric actuator (7) is bolted to the inner corner plate of the L-shaped folding plate (8). The L-shaped folding plate (8) is welded to the plate surface of the base plate (9). Threaded guide posts (10) are welded at four points on the upper plate surface of the base plate (9). The threaded guide posts (10) are installed with the side support legs (11) through the flange nuts (12). The side support legs (11) are welded to the lower seat surface of the base (2). The base plate (9) surface between the threaded guide posts (10) has recessed holes (13).

2. The high-precision oscillating rotary table for a five-axis machine tool according to claim 1, characterized in that: The height of the abutment bar (5) is greater than the depth of the guide groove (4), and the guide groove (4) is opened through the central seat plate surface of the base (2).

3. A high-precision oscillating rotary table for a five-axis machine tool according to claim 1, characterized in that: The upper surface of the base plate (6) is recessed and has a T-shaped hole. A bolt is screwed between the T-shaped hole and the mounting hole at the top of the telescopic frame plate of the electric push rod (7), and the head of the bolt is hidden in the large cavity of the T-shaped hole.

4. A high-precision oscillating rotary table for a five-axis machine tool according to claim 1, characterized in that: An installation hole is provided between the vertical housing of the electric actuator (7) and the L-shaped folding plate (8), and a bolt is screwed between the electric actuator (7) and the installation hole of the L-shaped folding plate (8).

5. A high-precision oscillating rotary table for a five-axis machine tool according to claim 1, characterized in that: The base plate of the side support leg (11) has a through hole for the threaded guide post (10) to pass through, and a flange nut (12) is screwed onto the column of the threaded guide post (10) that passes through the support hole.

6. A high-precision oscillating rotary table for a five-axis machine tool according to claim 1, characterized in that: The base plate (9) has a U-shaped groove with a recessed hole (13) on its surface, and a through hole is provided in the U-shaped groove of the recessed hole (13) to penetrate the base plate (9).

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