CN211249261U - A fixture for precision machining of a machining center - Google Patents

Abstract

The utility model relates to a clamp for precision machining of a machining center, which comprises a support frame detachably connected with a machine tool and a bearing plate for mounting a workpiece; the bearing plate is rotatably connected with the support frame, and the support frame is provided with a driving assembly for driving the bearing plate to rotate; the bearing plate is provided with an X-direction positioning component for limiting the position of a workpiece in the length direction of the bearing plate, a Y-direction positioning component for limiting the position of the workpiece in the width direction of the bearing plate and a pressing component for pressing the workpiece on the bearing plate; the bearing plate is provided with a yielding through hole for the machining tool to pass through; y is including dismantling the mount pad of being connected and the locating piece of setting on the mount pad with the loading board to locating component, and the locating piece is equipped with the Y that is used for with the laminating of workpiece surface to the locating surface towards the width direction protrusion in the mount pad setting of loading board, one side of locating piece towards the intermediate position of loading board width direction. The utility model discloses have the effect that can improve product machining precision.

Description

A fixture for precision machining of a machining center

technical field

The utility model relates to an auxiliary fixture for precision machining, in particular to a fixture for precision machining of a machining center.

Background technique

In the field of machining, there are many parts and components that require high dimensional accuracy. When using traditional milling machines, it is often necessary to clamp the blank multiple times and replace the reference coordinate system multiple times, which is difficult to ensure the machining accuracy of the product.

At present, the Chinese utility model patent with the publication number of CN208880210U announces a fixture tool and a machining center. The fixture tool includes a tray, a positioning structure and a fixing fixture. The first side of the tray is provided with a positioning groove, and the fixing fixture The positioning structure is arranged in the positioning groove, and the positioning structure is arranged on the second side surface of the tray, and the tray is positioned and matched with the positioning fixture on the machining center through the positioning structure.

After the product is clamped by the existing fixture, only the upper surface and side surface of the product can be processed, and only the upper surface of the product can be grooved and drilled. The defect is that the side or bottom surface of the product needs to be processed. When slotting or drilling, it is necessary to re-clamp, and it is difficult to ensure the positional accuracy of the hole or slot.

Utility model content

Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide a fixture for precision machining of a machining center that can ensure the machining accuracy of products.

The above-mentioned invention purpose of the present utility model is achieved through the following technical solutions: a fixture for precision machining of a machining center, comprising a support frame detachably connected to a machining platform of a machine tool and a carrier plate for installing blanks;

The bearing plate is rotatably connected with the support frame, and the support frame is provided with a driving component for driving the bearing plate to rotate;

The carrier plate is provided with an X-direction positioning component for restricting the position of the blank in the length direction of the carrier plate, a Y-direction positioning component for restricting the position of the blank in the width direction of the carrier plate, and a press for pressing the blank on the carrier plate. tight components;

The carrier plate is provided with a through hole for passing through the machining tool;

The Y-direction positioning assembly includes a mounting seat that is detachably connected to the bearing plate and a positioning block arranged on the mounting seat, the positioning block is protruding from the mounting seat toward the width direction of the bearing plate, and the positioning block faces the bearing plate. One side of the middle position in the width direction is provided with a Y-direction positioning surface for fitting with the blank surface.

By adopting the above technical solution, the support frame is used to install the carrier plate on the processing platform of the machine tool, and facilitate the rotation of the carrier plate, and the carrier plate is used to clamp the blank, so that the blank can be rotated together with the carrier plate, and the The through hole can be passed through by the machining tool, so that the various faces of the blank can be easily processed, which can better ensure the surface dimensional accuracy of the final product and the positional accuracy of the hole and groove; the driving component is used to drive the bearing plate to rotate, thereby The bearing plate can be rotated more conveniently; the X-direction positioning assembly is used to limit the position of the blank in the length direction of the bearing plate, and the Y-direction positioning assembly is used to limit the position of the blank in the width direction of the bearing plate; the mounting seat is used to install the positioning block, The Y-direction positioning surface can be made by finishing, so that the Y-direction positioning surface can more accurately define the position of the blank, thereby better improving the machining accuracy of the blank.

In a preferred example of the present invention, a positioning key can be further configured at the bottom of the mounting seat, and a positioning key slot matched with the positioning key is formed on the carrier plate.

By adopting the above technical solution, both the positioning key and the positioning keyway can be precisely machined, and the matching accuracy is high, so as to better ensure the positional accuracy of the mounting seat on the carrier plate, so that the positioning block can be more accurately aligned with the blank. Parts are positioned to further ensure the dimensional accuracy of the final product.

In a preferred example of the present invention, it can be further configured that: the Y-direction positioning components are provided with at least two groups in the length direction of the carrying plate.

By adopting the above technical solution, at least two sets of Y-direction positioning components can position the blank from multiple points, so that the blank can be positioned more accurately, and the dimensional accuracy of the final product is further ensured.

In a preferred example of the present invention, the X-direction positioning assembly includes a positioning column and a positioning cylinder for driving the positioning column to slide, and the positioning column slides along the height direction of the bearing plate and is arranged through the bearing plate.

By adopting the above technical solution, the positioning column is used to abut against the side wall of the blank, thereby ensuring higher accuracy of the blank, and the positioning cylinder is used to drive the positioning column to slide along the axis direction, so that the positioning column is more convenient to extend from the bearing plate ; After the processing is completed, the positioning column is recovered into the bearing plate, so that the positioning column does not contact the product, and the product can be easily removed from the bearing plate.

In a preferred example of the present invention, it can be further configured that: the pressing assembly includes a pressing seat, a pressing claw provided on the pressing seat, and a pressing driving rod for driving the pressing claw to swing. , the bottom of the carrying plate is connected with a pressing cylinder, the piston rod of the pressing cylinder is connected with the pressing driving rod, the pressing driving rod is hinged with the pressing claw, and the pressing seat is hinged with a pressing connection The end of the pressing link away from the pressing seat is hinged with the pressing claw; the pressing assembly is provided with a plurality of them on the bearing plate.

By adopting the above technical solution, the pressing cylinder is used to drive the pressing driving rod to slide along the axis, the pressing seat is used to install the pressing claws, and the pressing connecting rod is used to limit the swing range of the pressing claws, so that the pressing claws can be The blank is stably pressed on the carrier plate, so that the blank is clamped more stably, so that the blank can be processed more stably and the surface quality of the final product is guaranteed.

In a preferred example of the present invention, it can be further configured that: a pressing pad is detachably connected to the side of the pressing claw facing the carrying plate.

By adopting the above technical solution, the pressing pad and the pressing claw are detachably connected, so that the pressing pad with higher precision can be processed separately, so as to ensure that the pressing component can press the blank on the bearing plate more smoothly. This makes the blank more stable during processing, avoids vibration or displacement of the blank during processing, and ensures the surface accuracy and dimensional accuracy of the final product.

In a preferred example of the present invention, it can be further configured as follows: the carrier plate is detachably connected with space avoidance blocks, and at least three space avoidance blocks are provided on the carrier plate.

By adopting the above technical solution, the blank spacer block is used to heighten the blank, so that a blank space is formed between the blank and the bearing plate, so that the bearing plate will not be damaged when the blank is milled through grooves or through holes. The iron filings and cooling water can be better discharged from the clearance gap, thus avoiding the accumulation of iron filings and winding on the tool, thus ensuring the stable machining of the billet by the tool, ensuring the surface accuracy of the cutting tool on the billet, and improving the product quality. Surface Quality.

In a preferred example of the present invention, it can be further configured as follows: a drive turntable is rotatably connected to the support frame, a limit plate is provided on the drive turntable, and each of the drive turntables is provided with two ends in the length direction of the carrier plate. One, the bearing plate is placed on the limit plate and is bolted to the limit plate, the drive assembly includes a drive motor and a differential, and the output shaft of the drive motor is connected with the input shaft of the differential, The output shaft of the differential is connected to the drive turntable.

By adopting the above technical solutions, the drive turntables on both sides of the bearing plate make the installation of the bearing plate more stable, and make the bearing plate more stable when rotating; the limit plate makes the installation of the bearing plate more convenient, and it can be easily installed according to different products. Replacing different bearing plates can better improve the clamping efficiency of the blanks; the drive motor and differential can better drive the drive turntable to rotate, which in turn can more easily drive the bearing plates to rotate, so that the blanks can be more easily adjusted. The surface is processed to better ensure the surface accuracy of the final product, as well as the dimensional accuracy of the holes and slots.

To sum up, the present utility model includes at least one of the following beneficial technical effects:

1. The bearing plate is connected with the support frame in rotation, the Y-direction positioning component and the X-direction positioning component on the bearing plate respectively position the two mutually perpendicular sides of the blank, and the pressing component can clamp the blank on the bearing plate, thereby The machine tool can process the blank stably, which can better ensure the accuracy of the final product;

2. The blank spacer block can raise the blank, so that there is a clearance gap between the blank and the carrier plate, so that when machining through holes or through grooves, the debris can be discharged from the clearance gap, so as to avoid the problem. The accumulation of debris is wrapped around the tool, which ensures that the tool can process the blank stably and ensures the machining accuracy of the final product.

Description of drawings

Fig. 1 is the overall structural representation of this embodiment;

Fig. 2 is the schematic diagram of the disassembled state of the Y-direction positioning assembly and the carrier plate of the present embodiment;

3 is a schematic diagram of the X-direction positioning assembly of the present embodiment;

Fig. 4 is the schematic diagram of the positioning key on the mounting seat of the present embodiment;

Fig. 5 is the structural schematic diagram of the pressing assembly of the present embodiment;

Fig. 6 is the enlarged schematic diagram of the A part of Fig. 5;

FIG. 7 is an enlarged schematic diagram of part B of FIG. 2 .

In the figure, 1, support frame; 2, carrier plate; 3, drive assembly; 4, X-direction positioning assembly; 5, Y-direction positioning assembly; 6, pressing assembly; 9. Positioning block; 10. Y-direction positioning surface; 11. Positioning key; 12. Positioning keyway; 13. Positioning column; 14. Positioning cylinder; 15. Pressing seat; 16. Pressing claw; 17. Pressing the drive rod ;18, press the cylinder; 19, press the connecting rod; 20, press the pad; 21, avoid the pad; 22, drive the turntable; 23, limit plate; 24, drive motor; 25, differential; 26. Matching bosses; 27. Accommodating grooves.

Detailed ways

The present utility model will be described in further detail below in conjunction with the accompanying drawings.

1, it is a fixture for precision machining of a machining center disclosed by the utility model, including a support frame 1 and a bearing plate 2, the support frame 1 and the machining platform of the machine tool are connected by bolts, and the bearing plate 2 is used for clamping the workpiece; Two driving turntables 22 are rotatably connected to the frame 1, and the two driving turntables 22 are arranged coaxially. The drive assembly 3 includes a drive motor 24 and a differential gear 25. The output shaft of the drive motor 24 is connected with the input shaft of the differential gear 25 through a coupling, and the output shaft of the differential gear 25 is connected with the drive turntable 22. Timing belt drive.

Referring to FIGS. 1 and 2 , limit plates 23 are integrally formed on the opposite sides of the two drive turntables 22 , the carrier plate 2 is placed on the limit plates 23 of the two drive turntables 22 , and the carrier plate 2 passes through the limit plates 23 Bolt connection; the drive motor 24 is a servo motor, and the drive motor 24 is electrically connected with a power supply and a controller. The drive motor 24 can drive the drive turntable 22 to rotate, thereby driving the carrier plate 2 to rotate.

2 and 3, the carrier plate 2 is provided with an X-direction positioning component 4, a Y-direction positioning component 5 and a pressing component 6, the X-direction positioning component 4 is used to limit the position of the blank in the length direction of the carrier plate 2, and the Y-direction The positioning assembly 5 is used to limit the position of the blank in the width direction of the carrying plate 2, and the pressing assembly 6 is used to press the blank on the carrying plate 2; so that the blank can be positioned and clamped more stably, so that better improvement The accuracy of the blank is processed.

Referring to FIG. 2 , the carrier plate 2 is provided with a pass-through hole 7 near the middle position, and the pass-through hole 7 is in the shape of a long waist. The pass-through hole 7 can be passed through by a machining tool, so that after the support board 2 is rotated 180°, The tool on the machine tool can easily process the bottom surface of the blank, so that the workpiece does not need to be disassembled and assembled, the processing efficiency is improved, and the resetting of the processing reference is avoided, which can better improve the processing accuracy of the final product.

Referring to FIG. 3 , the X-direction positioning assembly 4 includes a positioning column 13 and a positioning cylinder 14 , the axis of the positioning column 13 is arranged along the height direction of the bearing plate 2 , the positioning column 13 is arranged through the bearing plate 2 , and the positioning cylinder 14 is bolted to the bearing plate 2 . The bottom surface of the positioning cylinder 14 is fixedly connected with the positioning column 13; the end of the positioning column 13 away from the positioning cylinder 14 is provided with a guiding slope.

2 and 4, the Y-direction positioning assembly 5 includes a mounting seat 8 and a positioning block 9 arranged on the mounting seat 8; the mounting seat 8 is connected with the bearing plate 2 by bolts, and the bottom of the mounting seat 8 is integrally formed with a positioning key 11, The carrier plate 2 is provided with a positioning keyway 12 that cooperates with the positioning key 11. The matching of the positioning key 11 and the positioning keyway 12 makes the positional relationship between the mounting seat 8 and the bearing plate 2 more accurate; The middle position is provided with a Y-direction positioning surface 10; the Y-direction positioning assembly 5 is provided with two along the length direction of the carrier plate 2, and the two positioning surfaces are attached to the side of the blank, so that the position of the blank in the width direction of the carrier plate 2 can be adjusted. It is better to be limited, so that the accuracy of the final product can be better guaranteed.

5 and 6, the pressing assembly 6 includes a pressing seat 15, a pressing claw 16 and a pressing driving rod 17, the pressing seat 15 is bolted on the bearing plate 2, and the pressing seat 15 is hinged with a pressing connection The rod 19, the end of the pressing link 19 away from the pressing seat 15 is hinged with the pressing claw 16, the axis of the pressing driving rod 17 is arranged along the height direction of the bearing plate 2, and the pressing driving rod 17 slides along its axis direction, The pressing driving rod 17 is arranged through the pressing seat 15; the end of the pressing driving rod 17 extending out of the pressing seat 15 is hinged with the pressing claw 16; the end of the pressing claw 16 away from the pressing seat 15 is bolted with a pressing washer 20. The pressing pad 20 can be replaced according to the height of the place where the blank needs to be pressed, so that the pressing component 6 can more stably press the blank on the carrier plate 2, so that the blank can be pressed more stably, so that the blank is processed during processing. It is not easy to vibrate or move during the process, so as to ensure the accuracy of processing; the carrier plate 2 is provided with a accommodating groove 27, the accommodating groove 27 is arranged below the pressing seat 15, and the accommodating groove 27 is provided with a pressing seat 15 welded to the pressing seat 15. The cylinder 18, the piston rod of the compression cylinder 18 is connected with the compression driving rod 17 by welding. Three groups of pressing assemblies 6 are arranged on the carrier plate 2 .

Referring to FIG. 7 , the carrier plate 2 is bolted with space-avoiding spacers 21 , there are four space-avoiding spacers 21 , and the four space-avoiding spacers 21 are respectively arranged at the four corners close to the carrying plate 2 ; the space-avoiding spacers 21 A matching boss 26 is integrally formed on a side face away from the carrier plate 2 .

The implementation principle of this embodiment is: when clamping the blank, first place the blank on the matching boss 26, and fit one side of the blank with the Y-direction positioning surface 10, and at the same time, the positioning cylinder 14 drives the positioning column 13 to extend and The side of the blank facing the positioning post 13 is in contact with the positioning post 13 ; then the pressing cylinder 18 drives the pressing driving rod 17 to extend, so that the pressing claw 16 can stably press the blank on the carrier plate 2 .

The examples of this specific embodiment are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore: any equivalent changes made according to the structure, shape and principle of the present invention should be Covered within the scope of protection of the present invention.

Claims (8)

1. A fixture for precision machining of a machining center, comprising a support frame (1) detachably connected with a machining platform of a machine tool and a bearing plate (2) for installing a blank; it is characterized in that: the bearing plate (2) and the support The frame (1) is rotatably connected, and the support frame (1) is provided with a driving component (3) for driving the bearing plate (2) to rotate; ) X-direction positioning assembly (4) for the position in the length direction, Y-direction positioning assembly (5) for restricting the position of the blank in the width direction of the carrier plate (2), and a press for pressing the blank on the carrier plate (2). A tightening assembly (6); the carrying plate (2) is provided with a through hole (7) for allowing the machining tool to pass through; the Y-direction positioning assembly (5) includes a detachable connection with the carrying plate (2) A mounting seat (8) and a positioning block (9) arranged on the mounting seat (8), the positioning block (9) is protruded from the mounting seat (8) toward the width direction of the bearing plate (2), and the positioning block (9) is provided. The side of the block (9) facing the middle position in the width direction of the carrier plate (2) is provided with a Y-direction positioning surface (10) for fitting with the surface of the blank. 2 . The fixture for precision machining of a machining center according to claim 1 , wherein a positioning key ( 11 ) is provided at the bottom of the mounting seat ( 8 ), and a positioning key ( 11 ) is provided on the carrier plate ( 2 ). The positioning key groove (12) matched with the positioning key (11). 3 . The fixture for precision machining of a machining center according to claim 1 , wherein at least two sets of the Y-direction positioning components ( 5 ) are provided in the length direction of the carrier plate ( 2 ). 4 . 4. The fixture for precision machining of a machining center according to claim 1, wherein the X-direction positioning assembly (4) comprises a positioning column (13) and a positioning cylinder (13) that drives the positioning column (13) to slide. 14), the positioning column (13) slides along the height direction of the bearing plate (2) and is arranged through the bearing plate (2). 5 . The fixture for precision machining of a machining center according to claim 1 , wherein the pressing component ( 6 ) comprises a pressing seat ( 15 ), and a pressing seat ( 15 ) is arranged on the pressing seat ( 15 ). A pressing claw (16) and a pressing driving rod (17) for driving the pressing claw (16) to swing, a pressing cylinder (18) is connected to the bottom of the carrier plate (2), and the pressing cylinder ( 18) is connected with a pressing driving rod (17), the pressing driving rod (17) is hinged with the pressing claw (16), and a pressing connecting rod (19) is hinged on the pressing seat (15). ), the end of the pressing link (19) away from the pressing seat (15) is hinged with the pressing claw (16); the pressing assembly (6) is provided with a plurality of on the bearing plate (2). 6 . The fixture for precision machining of a machining center according to claim 5 , wherein the pressing claw ( 16 ) is detachably connected with a pressing pad ( 20 ) toward the side of the bearing plate ( 2 ). 7 . . 7 . The fixture for precision machining of a machining center according to claim 1 , wherein the carrier plate ( 2 ) is detachably connected with a spacer block (21), and the spacer block (21) ) on the carrier plate (2) with at least three. 8 . The fixture for precision machining of a machining center according to claim 1 , wherein a drive turntable (22) is rotatably connected to the support frame (1), and a limiter is provided on the drive turntable (22). 9 . A plate (23), one of the drive turntables (22) is provided at each end of the carrying plate (2) in the length direction, the carrying plate (2) is placed on the limiting plate (23) and is connected to the The limit plate (23) is bolted, the drive assembly (3) includes a drive motor (24) and a differential (25), and the output shaft of the drive motor (24) is connected to the output shaft of the differential (25). The input shaft is connected, and the output shaft of the differential (25) is connected with the drive turntable (22).

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