Workpiece supporting tool for AC-axis five-axis machining center

Abstract

The utility model discloses a workpiece supporting tool for an AC-axis five-axis machining center, which belongs to the field of workpiece supporting tools and comprises a five-axis machining center body, an A axis is arranged in the five-axis machining center body, a C axis is arranged on the A axis, a rotating table is further arranged on the top surface of the C axis, a supporting mechanism is arranged on the top surface of the rotating table, and the supporting mechanism is arranged on the top surface of the rotating table. The supporting mechanism comprises a mechanism shell, a supporting table, a motor, a first small bevel gear, a large bevel gear, an adjusting screw rod, a second small bevel gear, an L-shaped plate and an inner supporting clamping block, and compared with a special supporting tool of which a chuck needs to be customized according to the size of an inner hole of a workpiece in the prior art, the supporting tool has the advantages that the chuck does not need to be replaced frequently; according to the supporting tool, the positions of the inner supporting clamping blocks can be rapidly and conveniently adjusted, so that clamping and supporting of workpieces with different inner hole sizes are achieved, the universality and use flexibility of the supporting tool are improved, and the overall machining efficiency of the workpieces is further improved.

Description

Technical Field

[0001] This utility model relates to the field of workpiece support fixtures, and in particular to a workpiece support fixture for an AC-axis five-axis machining center. Background Technology

[0002] A five-axis machining center with AC axes is a high-precision machining equipment. It has five motion axes: the A and C axes are rotary axes, rotating around the X and Z axes respectively, with a typical working range of +30 degrees to -120 degrees for the A axis and 360 degrees for the C axis; the X, Y, and Z axes are linear axes, responsible for the lateral, longitudinal, and vertical movement of the workpiece. These five axes can be linked for machining, enabling the equipment to flexibly and efficiently process complex curved surfaces and irregularly shaped parts. It is widely used in aerospace, automotive manufacturing, rail transportation, energy equipment manufacturing, medical devices, mold manufacturing, and many other fields.

[0003] In existing technologies, during the actual machining process of workpieces on AC-axis five-axis machining centers, the use of workpiece support fixtures is particularly necessary to ensure the stability of the workpiece during machining, effectively avoid shaking or displacement, and thus ensure that the machining accuracy meets the expected requirements. Support fixtures enable quick and accurate positioning and fixing of the workpiece. Especially when machining rotating workpieces with internal holes, such as collars, bearing rings, and gear blanks, specialized support fixtures are typically used. These specialized support fixtures typically consist of a chuck body, an elastic element, and a drive mechanism. When the drive mechanism applies force, the elastic element causes the chuck body to expand outward, thereby clamping the inner surface of the workpiece and achieving clamping and positioning support. However, existing specialized support fixtures have significant drawbacks. Because they require custom-made chucks based on the inner hole size of different workpieces, operators must frequently change the corresponding chucks when machining workpieces with varying inner hole sizes. This not only makes the operation process cumbersome and complex, consuming a lot of time and effort, but also results in poor versatility, making it unable to flexibly adapt to the machining needs of various workpiece sizes, ultimately severely impacting the overall machining efficiency of the workpiece. Utility Model Content

[0004] The main purpose of this utility model is to provide a workpiece support fixture for AC axis five-axis machining centers, which 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:

[0006] A workpiece support fixture for an AC-axis five-axis machining center includes a five-axis machining center body. The five-axis machining center body has an A-axis, and a C-axis is mounted on the A-axis. A rotary table is mounted on the top surface of the C-axis. A support mechanism is mounted on the top surface of the rotary table. The support mechanism includes a housing, a support platform, a motor, a first small bevel gear, a large bevel gear, an adjusting screw, a second small bevel gear, an L-shaped plate, and an inner support clamping block. The housing is fixedly connected to the top surface of the rotary table, and the motor is fixedly connected inside the housing. The first small bevel gear is fixedly connected to the motor output end. The large bevel gear is movably connected to the inner bottom surface of the housing via a T-shaped slider and meshes with the first small bevel gear. The support platform is fixedly connected to the inner bottom surface of the housing, and the adjusting screw is movably connected to the top surface of the support platform via rotating rods at both ends. The second small bevel gear is fixedly connected to the end wall of one of the rotating rods and meshes with the large bevel gear. The L-shaped plate is movably connected to the adjusting screw via a screw hole on its side wall, and the inner support clamping block is fixedly connected to the top surface of the L-shaped plate.

[0007] Furthermore, the outer shell of the mechanism is fixedly installed on the top surface of the rotary table, and a T-shaped annular groove is formed on the inner bottom surface of the outer shell.

[0008] Furthermore, the motor is fixedly installed on the inner bottom surface of the mechanism housing, and a first small bevel gear is fixedly installed on the output end of the motor.

[0009] Furthermore, a set of symmetrical T-shaped sliders are fixedly installed on the bottom surface of the large bevel gear, and the T-shaped sliders are movably installed in the T-shaped annular groove. The top surface of the large bevel gear is also provided with an opening, and the large bevel gear and the first small bevel gear mesh together.

[0010] Furthermore, the support platform is fixedly installed on the inner bottom surface of the housing and passes through the opening, and the top surface of the support platform has three transverse sliding openings in a circular array. Rotation holes are respectively opened on the inner end walls of the transverse sliding openings, and one of the rotation holes passes through the support platform.

[0011] Furthermore, rotating rods are fixedly installed at both ends of the adjusting screw, and the rotating rods are movably installed in the rotating holes. A second small bevel gear is fixedly installed on the end wall of the outer rotating rod, and the second small bevel gear meshes with the large bevel gear. The vertical part of the L-shaped plate is movably installed in the horizontal sliding opening, and a screw hole is opened on the side wall of the vertical part of the L-shaped plate and is threadedly connected to the adjusting screw through the screw hole. An inner support clamping block is fixedly installed on the top surface of the horizontal part of the L-shaped plate, and the outer side wall of the inner support clamping block is arc-shaped.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In this invention, the supporting mechanism places the workpiece on the top surface of the support platform. After the inner support blocks on three sides of the top surface of the support platform enter the inner hole of the workpiece, the motor drive output is turned on to drive the first small bevel gear to rotate. Under the rotational meshing action, the first small bevel gear drives the large bevel gear to rotate. The large bevel gear will rotate along the T-shaped groove through the T-shaped slider on the bottom surface. The large bevel gear will further drive the second small bevel gear on the outer wall of the support platform to rotate under the rotational meshing action. The second small bevel gear will drive the adjusting screw to rotate through the rotating rod, so that the L-shaped plate passes through the screw hole and moves along the adjusting screw horizontally. As the slide moves inward and outward, the inner support blocks on the three sides of the top surface of the support platform will move outward synchronously until the arc-shaped outer wall of the inner support block is in close contact with the inner hole wall of the workpiece. This allows for the inner support clamping and positioning of the workpiece. Compared to the special support fixtures in the prior art that require custom-made chucks according to the inner hole size of the workpiece, this support fixture does not require frequent chuck replacements. This support fixture can quickly and conveniently adjust the position of the inner support block to achieve clamping and support for workpieces with different inner hole sizes. This not only improves the versatility and flexibility of the support fixture but also improves the overall processing efficiency of the workpiece. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a cross-sectional schematic diagram of the outer shell of the mechanism of this utility model;

[0016] Figure 3 This is a schematic diagram of the overall structure of the support platform of this utility model;

[0017] Figure 4 This is a structural breakdown diagram of the support mechanism of this utility model.

[0018] In the diagram: 1. Five-axis machining center body; 2. A-axis; 3. C-axis; 4. Rotary table; 5. Support mechanism; 6. Mechanism housing; 7. T-shaped annular groove; 8. Support table; 9. Transverse sliding mouth; 10. Rotating hole; 11. Motor; 12. First small bevel gear; 13. Large bevel gear; 14. Through port; 15. T-shaped arc slider; 16. Adjusting screw; 17. Rotating rod; 18. Second small bevel gear; 19. L-shaped plate; 20. Screw hole; 21. Inner support clamping block. Detailed Implementation

[0019] To make the objectives, technical solutions and advantages of the present utility model clearer, the implementation methods of the present utility model will be described in detail below with reference to the accompanying drawings. However, the embodiments described in the present utility model are only some embodiments of the present utility model, and not all embodiments.

[0020] like Figure 1 - Figure 4 As shown, a workpiece support fixture for an AC-axis five-axis machining center includes a five-axis machining center body 1, an A-axis 2 inside the body 1, and a C-axis 3 on the A-axis 2. A rotary table 4 is also provided on the top surface of the C-axis 3. A support mechanism 5 is provided on the top surface of the rotary table 4. The support mechanism 5 includes a mechanism housing 6, a support platform 8, a motor 11, a first small bevel gear 12, a large bevel gear 13, an adjusting screw 16, a second small bevel gear 18, an L-shaped plate 19, and an inner support clamping block 21. The mechanism housing 6 is fixedly connected to the top surface of the rotary table 4, and the motor 11 is fixedly connected inside the mechanism housing 6. The bevel gear 12 is fixedly connected to the output end of the motor 11. The large bevel gear 13 is movably connected to the inner bottom surface of the mechanism housing 6 through the T-shaped slider 15 on the bottom surface and meshes with the first small bevel gear 12. The support platform 8 is fixedly connected to the inner bottom surface of the mechanism housing 6, and the adjusting screw 16 is movably connected to the top surface of the support platform 8 through the rotating rods 17 at both ends. The second small bevel gear 18 is fixedly connected to the end wall of one of the rotating rods 17 and meshes with the large bevel gear 13. The L-shaped plate 19 is movably connected to the adjusting screw 16 through the screw hole 20 on the side wall, and the inner support clamp 21 is fixedly connected to the top surface of the L-shaped plate 19.

[0021] like Figure 2 As shown, the outer shell 6 of the mechanism is fixedly installed on the top surface of the rotary table 4, and a T-shaped annular groove 7 is provided on the bottom surface of the inner surface of the outer shell 6. The T-shaped annular groove 7 allows the T-shaped slider 15 to slide in a circular trajectory inside it, so as to realize the rotation of the large bevel gear 13.

[0022] like Figure 4 As shown, the motor 11 is fixedly installed on the inner bottom surface of the housing 6 of the mechanism, and a first small bevel gear 12 is fixedly installed on the output end of the motor 11. When the motor 11 is turned on, the output end can drive the first small bevel gear 12 to rotate, providing driving force for the rotation of the large bevel gear 13.

[0023] like Figure 4 As shown, a set of symmetrical T-shaped sliders 15 are fixedly installed on the bottom surface of the large bevel gear 13, and the T-shaped sliders 15 are movably installed in the T-shaped annular groove 7. The top surface of the large bevel gear 13 is also provided with an opening 14, and the large bevel gear 13 and the first small bevel gear 12 mesh together. When the large bevel gear 13 rotates under the rotational meshing of the first small bevel gear 12, the T-shaped sliders 15 on its bottom surface will slide in the T-shaped annular groove 7 in a circular trajectory. At the same time, the large bevel gear 13 can provide synchronous driving force to the second small bevel gear 18 on the outer wall of the support platform 8.

[0024] like Figure 3As shown, the support platform 8 is fixedly installed on the inner bottom surface of the outer shell 6 of the mechanism and passes through the through opening 14. The top surface of the support platform 8 has three transverse sliding openings 9 in a ring array. The transverse sliding openings 9 are used to cooperate with the L-shaped plate 19 to achieve limited sliding. Rotation holes 10 are respectively opened on the inner end walls of the transverse sliding openings 9, and one end of the rotation hole 10 passes through the support platform 8. The rotation hole 10 is used to cooperate with the rotation rod 17 to achieve rotation operation.

[0025] like Figure 4 As shown, rotating rods 17 are fixedly installed at both ends of the adjusting screw 16, and the rotating rods 17 are movably installed in the rotating hole 10. A second small bevel gear 18 is fixedly installed on the end wall of the outer rotating rod 17, and the second small bevel gear 18 meshes with the large bevel gear 13. The vertical part of the L-shaped plate 19 is movably installed in the horizontal sliding hole 9, and a screw hole 20 is opened on the side wall of the vertical part of the L-shaped plate 19 and is threadedly connected to the adjusting screw 16 through the screw hole 20. An inner support clamping block 21 is fixedly installed on the top surface of the horizontal part of the L-shaped plate 19, and the outer wall of the inner support clamping block 21 is arc-shaped. After the second small bevel gear 18 rotates under the rotational meshing action of the large bevel gear 13, it will drive the adjusting screw 16 to rotate through the rotating rod 17, so that the L-shaped plate 19 moves outward along the adjusting screw 16 through the screw hole 20 until the inner support clamping block 21 is in close contact with the inner hole wall of the workpiece. In this way, workpieces with different inner hole sizes can be quickly positioned, clamped and supported.

[0026] The specific operating principle of support mechanism 5 when used in conjunction with an AC-axis five-axis machining center to machine rotating workpieces with internal holes is as follows:

[0027] A rotating workpiece with an inner hole is placed on the top surface of the support platform 8. After the inner support clamps 21 on three sides of the top surface of the support platform 8 are placed in the inner hole of the workpiece, the motor 11 installed on the bottom surface of the inner shell 6 is turned on. The motor 11 drives the first small bevel gear 12 to rotate. At this time, the first small bevel gear 12 will drive the large bevel gear 13 to rotate under the rotational meshing action. When the large bevel gear 13 rotates, it will drive the T-shaped slider 15 with the bottom surface symmetrical to slide in the T-shaped annular groove 7 opened on the bottom surface of the inner shell 6 in a circular trajectory to realize the rotatable operation of the large bevel gear 13. The large bevel gear 13 will further drive the second small bevel gear 18 on three sides of the outer wall of the support platform 8 to rotate under the rotational meshing action. The second small bevel gear 18 will drive the rotating rods 17 at both ends of the adjusting screw 16 to rotate in the rotating hole 10. The rotating rods 17 will drive the adjusting screw 16 to rotate on the top surface of the support platform 8. The L-shaped plate 19 rotates within the corresponding transverse sliding opening 9. At this time, the L-shaped plate 19 will move outward through the screw hole 20 on the side wall of the vertical part along the adjusting screw 16 within the transverse sliding opening 9. The L-shaped plate 19 will drive the inner support clamping block 21 installed on the top surface of the transverse part to move synchronously on the top surface of the support platform 8. At the same time, the inner support clamping blocks 21 on the three sides of the top surface of the support platform 8 will move outward synchronously until the arc-shaped outer wall of the inner support clamping block 21 is in close contact with the inner hole wall of the workpiece. The workpiece can then be clamped and positioned. Compared with the special support fixtures in the prior art that require the chuck to be customized according to the inner hole size of the workpiece, this support fixture does not require frequent replacement of the chuck. This support fixture can quickly and conveniently adjust the position of the inner support clamping block 21 to achieve clamping and support for workpieces with different inner hole sizes. This not only improves the versatility and flexibility of the support fixture, but also improves the overall processing efficiency of the workpiece.

[0028] The above description is merely a preferred embodiment of this utility model and does not imply its uniqueness or limitation. Those skilled in the art should understand that various changes or equivalent substitutions made to this utility model without departing from its scope are all within the protection scope of this utility model.

Claims

1. A workpiece supporting tool for an AC shaft five-axis machining center, comprising a five-axis machining center body (1), an A shaft (2) is arranged in the five-axis machining center body (1), and a C shaft (3) is arranged on the A shaft (2), and a rotary table (4) is further arranged on the top surface of the C shaft (3), characterized in that: The top surface of the rotating table (4) is provided with a supporting mechanism (5), and the supporting mechanism (5) comprises a mechanism shell (6), a supporting table (8), a motor (11), a first small bevel gear (12), a large bevel gear (13), an adjusting screw rod (16), a second small bevel gear (18), an L-shaped plate (19) and an inner supporting clamping block (21), the mechanism shell (6) is fixedly connected to the top surface of the rotating table (4), and the motor (11) is fixedly connected in the mechanism shell (6); the first small bevel gear (12) is fixedly connected to the output end of the motor (11); the large bevel gear (13) is movably connected to the inner bottom surface of the mechanism shell (6) through the T-shaped arc-shaped sliding block (15) on the bottom surface and is in mesh with the first small bevel gear (12); the supporting table (8) is fixedly connected to the inner bottom surface of the mechanism shell (6), and the adjusting screw rod (16) is movably connected to the top surface of the supporting table (8) through the rotating rods (17) at both ends; the second small bevel gear (18) is fixedly connected to the end wall of one of the rotating rods (17) and is in mesh with the large bevel gear (13); the L-shaped plate (19) is movably connected with the adjusting screw rod (16) through the screw holes (20) on the side wall, and the inner supporting clamping block (21) is fixedly connected to the top surface of the L-shaped plate (19). ​ 2. The workpiece support tooling for an AC spindle five-axis machining center of claim 1, wherein: The mechanism shell (6) is fixedly installed on the top surface of the rotating table (4), and a T-shaped ring groove (7) is formed in the inner bottom surface of the mechanism shell (6).

3. The workpiece support tooling for an AC spindle five-axis machining center of claim 2, wherein: The motor (11) is fixedly installed on the inner bottom surface of the mechanism shell (6), and a first small bevel gear (12) is fixedly installed on the output end of the motor (11).

4. The workpiece support tooling for an AC spindle five-axis machining center of claim 3, wherein: A group of symmetrical T-shaped arc-shaped sliding blocks (15) are fixedly installed on the bottom surface of the large bevel gear (13), and the T-shaped arc-shaped sliding blocks (15) are movably installed in the T-shaped ring groove (7); a through hole (14) is formed in the top surface of the large bevel gear (13), and the large bevel gear (13) and the first small bevel gear (12) are in mesh with each other.

5. The workpiece support tooling for an AC spindle five-axis machining center of claim 4, wherein: The supporting table (8) is fixedly installed on the inner bottom surface of the mechanism shell (6) and passes through the through hole (14), and three transverse sliding openings (9) are formed in the top surface of the supporting table (8) in a ring array; rotating holes (10) are formed in the inner end walls of the transverse sliding openings (9), and one of the rotating holes (10) penetrates the supporting table (8).

6. The workpiece support tooling for an AC spindle five-axis machining center of claim 5, wherein: Rotating rods (17) are fixedly installed at both ends of the adjusting screw rod (16), and the rotating rods (17) are movably installed in the rotating holes (10); second small bevel gears (18) are fixedly installed on the end walls of the rotating rods (17) on the outer side, and the second small bevel gears (18) and the large bevel gear (13) are in mesh with each other; the vertical part of the L-shaped plate (19) is movably installed in the transverse sliding opening (9), screw holes (20) are formed in the vertical part of the L-shaped plate (19) and are in threaded connection with the adjusting screw rod (16); the inner supporting clamping block (21) is fixedly installed on the top surface of the horizontal part of the L-shaped plate (19), and the outer side wall of the inner supporting clamping block (21) is in an arc shape.

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