Automatic clamp for numerical control machining of aluminum alloy die castings

Abstract

The aluminum alloy die casting numerical control machining automatic clamp comprises a mounting base, a first gear is rotationally arranged in the middle of the bottom of the inner wall of a mounting groove, and four second gears are rotationally arranged at the positions, located on the outer edge of the first gear, of the bottom of the inner wall of the mounting groove at equal intervals; third gears are rotationally arranged at the four corners of the bottom of the inner wall of the mounting groove correspondingly, adjusting shafts are rotationally arranged at the four corners of the top end of the clamp bottom plate correspondingly, and limiting plates are arranged at one ends of the four adjusting shafts correspondingly. According to the utility model, the motor is started to drive the first gear to rotate in the mounting groove, the first gear is engaged with the second gear to rotate, and the second gear is engaged with the third gear to drive the adjusting shaft at the upper end to rotate, so that the limiting plate at the upper end is driven to rotate back and forth on the clamp bottom plate; the periphery of the workpiece can be extruded and clamped when the workpiece rotates towards the center position of the clamp bottom plate, the workpiece is not prone to shaking and deviation after being fixed at multiple angles, and the machining precision of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of numerical control machining fixtures, in particular to an automatic fixture for numerical control machining of aluminum alloy die-castings. Background Technique

[0002] Aluminum alloy die-cast products are mainly used in industries such as electronics, automobiles, motors, household appliances, and some communication industries. Some high-performance, high-precision, and high-toughness aluminum alloy products are also used in industries with relatively high requirements such as large aircraft and ships. The main use is still for parts of some instruments. When machining aluminum alloys, numerical control machining equipment is used to improve production quality. During the numerical control machining process, fixtures are required to clamp and fix aluminum alloy die-cast workpieces to make the machining more stable and convenient.

[0003] In response to this, Chinese Patent No. CN114700782B proposes an automatic fixture for numerical control machining of aluminum alloy die-castings. This invention patent utilizes the cooperation of an electric slide rail and a slider to enable the clamping plate to move horizontally, thereby sending the machined workpiece to the conveyor belt for feeding and discharging, making the device convenient for loading and unloading and improving the machining efficiency. However, when the fixture in the above technical solution is used, its clamping direction is two-way clamping, and all-round clamping is not achieved. When machining square aluminum alloy castings, high-strength stamping may cause them to loosen and shift, resulting in inaccurate numerical control machining positions and thus reducing the machining accuracy of the device. Summary of the Utility Model

[0004] In order to solve the above problems, the purpose of the utility model is to provide an automatic fixture for numerical control machining of aluminum alloy die-castings to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model proposes an automatic fixture for numerical control machining of aluminum alloy die-castings, including a mounting base, and an automatic clamping mechanism with multi-angle fixation is arranged at the upper end of the mounting base;

[0006] The automatic clamping mechanism with multi-angle fixation includes a fixture base plate arranged at the upper end of the mounting base. An installation groove is opened on the inner wall of the fixture base plate. A first gear is rotatably arranged at the middle position of the bottom of the inner wall of the installation groove. Four second gears are rotatably arranged at equal distances on the outer edge of the first gear at the bottom of the inner wall of the installation groove. The outer walls of the four second gears are respectively meshed with the outer wall of the first gear. Third gears are rotatably arranged at the four corners of the bottom of the inner wall of the installation groove. The outer walls of the four third gears are respectively meshed with the outer walls of the four second gears. Adjusting shafts are rotatably arranged at the four corners of the top of the fixture base plate. One ends of the four adjusting shafts are respectively fixedly connected to the tops of the four third gears. Limiting plates are arranged at one ends of the four adjusting shafts.

[0007] In one example, extension bars are fixedly provided on one side of each of the four limiting plates, and the outer walls of each extension bar are respectively inserted and connected to the inner walls on one side of each adjusting shaft. A plurality of screw holes are equidistantly formed at the top ends of each extension bar.

[0008] In one example, fixing bolts are respectively inserted through the top ends of each adjusting shaft, and the four fixing bolts respectively pass through the inner walls of the four adjusting shafts and are threadedly connected to the inner walls of four of the screw holes.

[0009] In one example, a limiting block is fixedly provided at the middle position of the bottom of the fixture base plate. A connection groove is formed at the middle position of the bottom of the limiting block. A motor is fixedly provided on the inner wall of the connection groove, and a protective cover is fixedly provided at the upper edge of the inner wall of the connection groove.

[0010] In one example, one end of the first gear respectively passes through the inner wall of the fixture base plate and the inner wall of the limiting block and is fixedly connected to the output end of the motor. Limiting holes are formed at the four corners of the bottom of the fixture base plate and at the four corners of the bottom of the limiting block.

[0011] In one example, a groove is formed on one side of the top end of the mounting base, and the outer wall of the limiting block is inserted and connected to the inner wall of the groove. Limiting shafts are fixedly provided at the four corners of the inner wall of the groove and at the four corners of the top end of the mounting base located at the outer edge of the groove.

[0012] In one example, the outer walls of each limiting shaft are respectively inserted and connected to the inner walls of the limiting holes, and a fixing bracket is fixedly provided at the edge of the other side of the top end of the mounting base.

[0013] One side of the fixture base plate is fixedly provided with a switch panel, and the motor is electrically connected to an external power supply through the switch panel.

[0014] The automatic fixture for numerically controlled machining of aluminum alloy die-castings proposed by the present utility model can bring the following beneficial effects:

[0015] 1. For the automatic fixture for numerically controlled machining of aluminum alloy die-castings, starting the motor drives the first gear to rotate in the mounting groove, and then drives the second gear to rotate through meshing. At the same time, the second gear meshes with the third gear to rotate the upper adjusting shaft. During the rotation, the upper limiting plate can be driven to rotate reciprocally on the fixture base plate. When rotating together towards the center position of the fixture base plate, the workpiece can be squeezed and clamped around, so that it is not easy to shake and shift after being fixed at multiple angles, improving the machining accuracy of the device.

[0016] 2. For the CNC machining automatic fixture of an aluminum alloy die-casting part, according to the size of the placed square workpiece, loosen the fixing bolt on the adjusting shaft to pull the limiting plate. The extension bar on it penetrates through the adjusting shaft to adjust the extrusion length of the limiting plate. The longer the extension bar is stretched, the smaller the size of the workpiece that this fixture can clamp. On the contrary, it can clamp workpieces of larger sizes. After adjusting the length, tighten the fixing bolt to use, which improves the convenience of using the device. Brief Description of the Drawings

[0017] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0018] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0019] Figure 2 is a schematic structural diagram of the inside of the fixture base plate of the present invention;

[0020] Figure 3 is an enlarged schematic structural diagram of part A in the attached Figure 2 description of the present invention;

[0021] Figure 4 is a schematic structural diagram of the bottom of the fixture base plate of the present invention;

[0022] Figure 5 is a schematic structural diagram of the whole of the mounting base of the present invention.

[0023] In the figure: 1. Mounting base; 2. Fixture base plate; 3. Mounting groove; 4. First gear; 5. Second gear; 6. Third gear; 7. Adjusting shaft; 8. Extension bar; 9. Limiting plate; 10. Screw hole; 11. Fixing bolt; 12. Limiting block; 13. Motor; 14. Protective cover; 15. Limiting hole; 16. Groove; 17. Limiting shaft; 18. Fixed bracket. Detailed Embodiment

[0024] In order to more clearly explain the overall concept of the present invention, the following is a detailed description by way of example in combination with the drawings in the specification.

[0025] The embodiments are as follows:

[0026] The present invention provides an automatic fixture for CNC machining of aluminum alloy die-casting parts as Figures 1-5 shown, including a mounting base 1, and an automatic clamping mechanism with multi-angle fixation is arranged at the upper end of the mounting base 1;

[0027] The automatic clamping mechanism with multi-angle fixation includes a fixture bottom plate 2 provided at the upper end of the mounting base 1. An installation groove 3 is formed in the inner wall of the fixture bottom plate 2. A first gear 4 is rotatably provided at the middle position of the bottom of the inner wall of the installation groove 3. Four second gears 5 are rotatably provided at equal intervals at the outer edge of the first gear 4 at the bottom of the inner wall of the installation groove 3. The outer walls of the four second gears 5 are respectively meshed with the outer wall of the first gear 4. Third gears 6 are rotatably provided at the four corners of the bottom of the inner wall of the installation groove 3. The outer walls of the four third gears 6 are respectively meshed with the outer walls of the four second gears 5. Adjusting shafts 7 are rotatably provided at the four corners of the top of the fixture bottom plate 2. One ends of the four adjusting shafts 7 are respectively fixedly connected to the tops of the four third gears 6. Limit plates 9 are provided at one ends of the four adjusting shafts 7. When the adjusting shaft 7 rotates, the limit plate 9 rotates together to adjust the position. After the four limit plates 9 all contact the workpiece, the motor 13 is started to drive. Under the mutual meshing of the gears, the limit plate 9 abuts against the periphery of the workpiece to clamp it. The workpiece is squeezed in all four directions to ensure its stability. And the second gear 5 is mainly arranged between the first gear 4 and the third gear 6 to increase the meshing distance, so that the distance between the upper adjusting shafts 7 can be kept large enough;

[0028] Further, extension strips 8 are fixedly provided on one side of each of the four limit plates 9. The outer walls of each extension strip 8 are respectively inserted into the inner walls on one side of each adjusting shaft 7. A plurality of screw holes 10 are equidistantly formed at the top of each extension strip 8.

[0029] Fixing bolts 11 are respectively inserted through the tops of each adjusting shaft 7. The four fixing bolts 11 respectively pass through the inner walls of the four adjusting shafts 7 and are threadedly connected to the inner walls of four of the screw holes 10. A plurality of screw holes 10 are formed in the extension strip 8. According to the size of the workpiece, it is adjusted to the specified area and the fixing bolt 11 is screwed into the specified screw hole 10 to make the limit plate 9 contact the middle area on one side of the workpiece as much as possible, which can ensure that it is fixed more firmly;

[0030] Further, a limit block 12 is fixedly provided at the middle position of the bottom of the fixture bottom plate 2. A connection groove is formed at the middle position of the bottom of the limit block 12. A motor 13 is fixedly provided on the inner wall of the connection groove. A protective cover 14 is fixedly provided at the upper edge of the inner wall of the connection groove. The protective cover 14 is tightened in the connection groove by screws to protect the motor 13. When maintaining the motor 13 later, the screws can be unscrewed to remove the protective cover 14.

[0031] One end of the first gear 4 respectively passes through the inner wall of the fixture bottom plate 2 and the inner wall of the limit block 12 and is fixedly connected to the output end of the motor 13. Limit holes 15 are formed at the four corners of the bottom of the fixture bottom plate 2 and the four corners of the bottom of the limit block 12;

[0032] Furthermore, a groove 16 is formed on one side of the top end of the mounting base 1, and the outer wall of the limiting block 12 is inserted into the inner wall of the groove 16. Limiting shafts 17 are fixedly arranged at the four corners of the inner wall of the groove 16 and at the four corners of the top end of the mounting base 1 located at the outer edge of the groove 16.

[0033] The outer wall of each limiting shaft 17 is respectively inserted into the inner wall of the limiting hole 15. A fixing bracket 18 is fixedly arranged at the edge of the other side of the top end of the mounting base 1. After the limiting block 12 is snapped into the groove 16, the limiting holes 15 therein and the limiting holes 15 at the bottom of the fixture base plate 2 are respectively engaged with the limiting shafts 17 in the groove 16 and the limiting shafts 17 at the upper end of the mounting base 1, so as to stably position it on the mounting base 1. Then, by connecting the fixing bracket 18 with the connecting mechanism in the numerical control device, the whole can be fixed in the numerical control device and wait for processing.

[0034] Working principle: When using the automatic fixture for numerical control machining of aluminum alloy die-castings in this design scheme, first, the fixture base plate 2 with the limiting block 12 needs to be snapped into the groove 16 at the upper end of the mounting base 1 for positioning, and then the whole mounting base 1 is fixed in the numerical control device through the fixing bracket 18 for use. Place the aluminum alloy die-casting on the upper end of the fixture base plate 2, start the motor 13 to drive the first gear 4 to rotate in the mounting groove 3, and then drive the second gear 5 to rotate through meshing. At the same time, the second gear 5 meshes with the third gear 6 to make the upper adjusting shaft 7 rotate. When rotating, it can drive the upper limiting plate 9 to rotate reciprocally on the fixture base plate 2. When rotating towards the center position of the fixture base plate 2 together, the workpiece can be squeezed and clamped around, so that it is fixed at multiple angles and is not easy to shake and shift. When the four limiting plates 9 rotate outwards, the extrusion fixation on the workpiece can be released, and the workpiece can be taken out. The operation is simple, and synchronous clamping is realized. When clamping a square workpiece, multi-angle fixation is realized, so that it is not easy to shift under high-strength stamping, improving the processing accuracy of the device. And according to the size of the placed square workpiece, loosen the fixing bolt 11 on the adjusting shaft 7 to pull the limiting plate 9, and the extension bar 8 thereon is inserted on the adjusting shaft 7 to adjust the extrusion length of the limiting plate 9. The longer the extension bar 8 is stretched, the smaller the size of the workpiece that the fixture can clamp. On the contrary, it can clamp large-size workpieces. After adjusting the length, tighten the fixing bolt 11 to use, improving the convenience of the device.

[0035] Each embodiment in this specification is described in a progressive manner. The same or similar parts among the embodiments can be referred to each other, and the differences between each embodiment and other embodiments are emphasized. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment.

[0036] The above are only embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, various modifications and variations can be made to the present utility model. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the scope of the claims of the present utility model.

Claims

1. An automatic fixture for CNC machining of aluminum alloy die castings, comprising a mounting base (1), characterized in that: An automatic clamping mechanism capable of fixing at multiple angles is provided at the upper end of the mounting base (1); The multi-angle fixed automatic clamping mechanism comprises a clamp base plate (2) arranged at the upper end of the mounting base (1), the inner wall of the clamp base plate (2) is provided with a mounting groove (3), a first gear (4) is rotatably provided at the middle position of the bottom of the inner wall of the mounting groove (3), four second gears (5) are rotatably provided at the bottom of the inner wall of the mounting groove (3) at the outer edge of the first gear (4), and the outer walls of the four second gears (5) are respectively meshed with the outer walls of the first gear (4), third gears (6) are rotatably provided at the four corners of the bottom of the inner wall of the mounting groove (3), and the outer walls of the four third gears (6) are respectively meshed with the outer walls of the four second gears (5), and adjusting shafts (7) are rotatably provided at the four corners of the top of the clamp base plate (2), and one end of the four adjusting shafts (7) is respectively fixedly connected to the top of the four third gears (6), and one end of the four adjusting shafts (7) is provided with a limiting plate (9).

2. The automatic fixture for CNC machining of aluminum alloy die castings according to claim 1, characterized in that: An extension bar (8) is fixedly provided on one side of each of the four limit plates (9), and the outer wall of each extension bar (8) is respectively connected to the inner wall of one side of each adjustment shaft (7) through an interlaced manner, and a plurality of screw holes (10) are evenly spaced at the top end of each extension bar (8).

3. The automatic fixture for CNC machining of aluminum alloy die castings according to claim 2, characterized in that: A fixing bolt (11) is inserted into the top end of each adjusting shaft (7), and the four fixing bolts (11) respectively pass through the inner walls of the four adjusting shafts (7) and are threadedly connected to the inner walls of four screw holes (10).

4. The automatic fixture for CNC machining of aluminum alloy die castings according to claim 1, characterized in that: A limit block (12) is fixedly provided at the middle position of the bottom of the clamp base plate (2), a connecting groove is provided at the middle position of the bottom of the limit block (12), a motor (13) is fixedly provided on the inner wall of the connecting groove, and a protective cover (14) is fixedly provided at the upper edge of the inner wall of the connecting groove.

5. The automatic fixture for CNC machining of aluminum alloy die castings according to claim 1, characterized in that: One end of the first gear (4) passes through the inner wall of the clamp base plate (2) and the inner wall of the limit block (12) and is fixedly connected to the output end of the motor (13); and limiting holes (15) are provided at the four corners of the bottom of the clamp base plate (2) and the four corners of the bottom of the limit block (12).

6. The automatic fixture for CNC machining of aluminum alloy die castings according to claim 5, characterized in that: A groove (16) is provided on one side of the top of the mounting base (1), and the outer wall of the limit block (12) is interlaced with the inner wall of the groove (16), and limit shafts (17) are fixedly provided at the four corners of the inner wall of the groove (16) and at the four corners of the top of the mounting base (1) at the outer edge of the groove (16).

7. The automatic fixture for CNC machining of aluminum alloy die castings according to claim 6, characterized in that: The outer wall of each of the limiting shafts (17) is respectively connected to the inner wall of the limiting hole (15) through insertion, and a fixing bracket (18) is fixedly provided at the edge of the other side of the top of the mounting base (1).

8. The automatic fixture for CNC machining of aluminum alloy die castings according to claim 4, characterized in that: A switch panel is fixedly provided on one side of the clamp bottom plate (2), and the motor (13) is electrically connected to an external power source via the switch panel.

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