A clamping tool for machining a rotary table

Abstract

The utility model discloses a kind of clamping tool for rotary table machining, comprising: tooling table top;At least one tooling platform, tooling platform is detachably installed on tooling table top;Multiple tooling supports, tooling support is detachably set on tooling platform, and the top of tooling support is equipped with tooling support surface;Positioning mechanism, set on at least one tooling support, for positioning rotary table machine workpiece;And clamping mechanism, set on tooling support, for clamping and fixing rotary table machine workpiece on tooling support surface.The utility model is by setting parallel T groove on table top and can dismantle and install multiple platform, adjustable support is arranged on platform and positioning pin is set on key support and cooperates with workpiece positioning hole, forms reconfigurable multi-point support and pinhole positioning system, realizes the quick clamping of different models rotary table and accurate positioning.

Description

Technical Field

[0001] This utility model relates to the field of mechanical equipment manufacturing, and in particular to a clamping fixture for rotary table machining. Background Technology

[0002] In the manufacturing fields of engineering machinery and heavy equipment, rotary table machines are key core components, and their machining accuracy directly affects the performance and stability of the entire equipment. Rotary table machines are typically welded or cast parts with complex structures, irregular shapes, and large volumes and weights, requiring machining on large boring and milling machines or machining centers. To ensure machining quality, specialized tooling (i.e., fixtures) must be used to stably and accurately position and clamp the workpiece on the rotary table machine.

[0003] Currently, the industry commonly uses specialized welding fixtures for processing large, irregular workpieces. These fixtures are manufactured using welding steel plates and profiles based on the structure of a specific rotary table machine. Their support points, positioning points, and clamping points are completely fixed, corresponding one-to-one with specific parts of the workpiece. During production, the rotary table machine workpiece to be processed is hoisted onto this specialized welding fixture, clamped by the fixed positioning surfaces and clamping mechanism, and then subsequent milling, boring, and other processing steps are performed. This "one workpiece, one fixture" approach has found some application in the mass production of specific products.

[0004] However, the existing technology using specialized welding fixtures has the following obvious technical problems in practical applications: First, it has poor versatility and high manufacturing costs. This type of specialized tooling is tailor-made for a single product model, and its structure is completely fixed. Once the product design changes, or different product models need to be processed, a completely new tooling must be designed and manufactured, resulting in long development cycles and high costs, and making it unable to adapt to the flexible production needs of multiple varieties and small batches.

[0005] Secondly, the positioning accuracy is difficult to adjust, affecting processing quality. Large welded parts (such as rotary tables) inevitably experience welding deformation and dimensional errors during manufacturing. The positioning elements of traditional dedicated tooling are in fixed positions and cannot be flexibly fine-tuned according to the actual errors of each workpiece. This leads to clamping stress due to workpiece deformation or inability to accurately align with the positioning reference during clamping, ultimately affecting processing accuracy and reducing the product yield.

[0006] Therefore, how to design a machining fixture that is versatile, easy to adjust, adaptable to different product models, and able to compensate for workpiece errors is a technical problem that urgently needs to be solved. Utility Model Content

[0007] The technical problem to be solved by this utility model is: addressing the technical defects of existing special welding fixtures used for processing large irregular workpieces such as rotary tables, which have poor versatility, high manufacturing costs, and cannot be flexibly adjusted according to the actual error of the workpiece, this utility model provides a clamping fixture for rotary table processing that is modular in structure, easy to adjust, and highly versatile.

[0008] The technical solution adopted by this utility model to solve its technical problem is: A clamping fixture for rotary table machining, comprising: work surface; At least one tooling platform, which is detachably mounted on a tooling table; Multiple tooling supports are provided, which are detachably mounted on the tooling platform, and the top of each tooling support is provided with a tooling support surface. A positioning mechanism, mounted on at least one tooling support, is used to position the workpiece of the turntable machine; and The clamping mechanism, mounted on the tooling support, is used to clamp and fix the turntable machine workpiece onto the tooling support surface.

[0009] Preferably, the tooling table is provided with multiple T-slots, and the tooling platform is connected to the T-slots by fasteners.

[0010] Preferably, the tooling platform includes a first tooling platform, a second tooling platform, and a third tooling platform, which are distributed on the tooling table.

[0011] Preferably, the tooling support is a vertical structure, with a flange at its bottom for fixing it to the tooling platform.

[0012] Preferably, the positioning mechanism includes at least one positioning pin for engaging with a positioning hole on the workpiece of the turntable.

[0013] Preferably, the clamping mechanism includes: Pressure plate, which is detachably mounted on the tooling support; The screw and nut; the nut is threaded with the screw and is used to drive the pressure plate to apply pressure to the workpiece of the turntable machine.

[0014] Preferably, it also includes at least one support rod, which is detachably mounted on at least one clamping mechanism.

[0015] The beneficial effects of this utility model include the following: This invention establishes a reconfigurable multi-point support and pin-hole positioning system by setting parallel T-slots on the tooling table and detachably installing multiple tooling platforms on them. Adjustable tooling supports are arranged on the tooling platforms, and positioning pins that cooperate with the workpiece positioning holes are set on the key supports. This enables rapid clamping and precise positioning of different models of turntable machines, solving the problems of poor versatility, high cost due to modification and remanufacturing of traditional special welding tooling, and difficulty in guaranteeing positioning accuracy.

[0016] This invention utilizes a clamping mechanism consisting of a pressure plate, screw, and nut, mounted on a tooling support, to apply a reliable clamping force to the workpiece after it has been positioned. Simultaneously, support rods are installed between adjacent tooling supports, connecting them into a local rigid frame. This creates a short force chain clamping path and an enhanced vibration-resistant structure, achieving stable clamping and vibration suppression under heavy cutting conditions. This solves the problem of unstable machining quality caused by easy displacement and vibration of existing tooling during processing.

[0017] This utility model, through the adjustable design of the tooling platform and tooling support, enables the tooling support surfaces at the top of each support to be coplanar and accurately match the reference holes corresponding to the positioning pins. This achieves clamping end compensation for workpiece welding deformation and dimensional errors, solves the problem of clamping stress and reference offset caused by individual differences in workpieces, and improves dimensional and positional accuracy and first-pass yield. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the clamping fixture for rotary table machining in Example 1, which clamps the workpiece of the rotary table machine. Figure 2 This is a schematic diagram of the clamping fixture used for turntable machining in Example 1; Figure 3 for Figure 2 Enlarged view of point a in the middle.

[0019] Reference numerals: 1. Tooling table; 11. T-slot; 2. Tooling platform; 21. First tooling platform; 22. Second tooling platform; 23. Third tooling platform; 24. Inverted T-shaped connecting pin; 3. Tooling support; 31. Flange; 4. Locating pin; 5. Clamping mechanism; 51. Pressure plate; 52. Screw; 53. Nut; 54. Slot; 55. Nut; 56. Support block; 6. Support rod; 61. Rod seat; 7. Lifting eye bolt; 8. Turntable machine workpiece. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but these specific embodiments do not limit the scope of protection of the present invention in any way. Example

[0021] See Figures 1-3A clamping fixture for rotary table machining includes a fixture table 1, multiple independently configurable fixture platforms 2, multiple fixture supports 3, locating pins 4, a clamping mechanism 5, and support rods 6. This machining fixture is mainly used for the stable and precise positioning and clamping of large and irregularly shaped rotary table workpieces 8. It is suitable for the clamping requirements of large boring and milling machines or machining centers, and can adapt to the machining clamping of different models of rotary tables through modular combination and position adjustment.

[0022] In this embodiment, the tooling table 1 has a rectangular plate structure, and multiple parallel T-slots 11 are provided along the length direction of the surface for connecting and locking with multiple tooling platforms 2 installed on it, and allowing the tooling platforms 2 to be adjusted along the direction of the T-slots 11 so as to be quickly reconfigured according to the support and reference distribution of different workpieces.

[0023] In this embodiment, multiple tooling platforms 2 are detachably mounted on the tooling table 1, including a first tooling platform 21, a second tooling platform 22, and a third tooling platform 23, all of which are rectangular plate structures with a certain thickness. Each tooling platform 2 is fixed to the tooling table 1 by engaging with the T-slot 11 of the tooling table 1 via an inverted T-shaped connecting pin 24. By planning the relative positions, spacing, and orientations of the three tooling platforms 2 on the tooling table 1, a basic support belt adapted to the bottom contours of different turntables can be formed, providing an installation base surface for the precise arrangement of the subsequent tooling supports 3.

[0024] In this embodiment, multiple tooling supports 3 are vertically installed on each tooling platform 2. Specifically, the first tooling platform 21 has two sets (four in total) of tooling supports 3 arranged side-by-side; the second tooling platform 22 has four tooling supports 3 arranged in a "Y" shape; and the third tooling platform 23 has one tooling support 3. Each tooling support 3 is a vertical structure, with its bottom securely connected to the corresponding tooling platform 2 via flanges 31 and bolts. This allows for discrete arrangement on the tooling platform 2 according to the distribution of workpiece support points. The top of each tooling support 3 has a flat tooling support surface for contacting the corresponding position on the bottom of the workpiece 8 of the turntable, forming a multi-point distributed stable support. By selecting and fine-tuning the installation of each tooling support 3, the top tooling support surfaces of all tooling supports 3 are made coplanar, thereby establishing a reliable geometric support datum and reducing the clamping stress introduced by the workpiece's own weight or local deformation.

[0025] In this embodiment, the locating pin 4 is disposed on one side of the top surface of the tooling support 3 to establish a machining datum for the workpiece in the horizontal plane. In this embodiment, the locating pin 4 is cylindrical, and its axis is perpendicular to the top surface of the tooling support 3. During the clamping process, the locating holes on the workpiece 8 of the turntable machine and the locating pin 4 are engaged by a pin hole to restrict the workpiece's translational and rotational degrees of freedom in the plane, ensuring that the workpiece is accurately positioned relative to the tooling coordinate system. To accommodate the distribution of locating holes for different types of workpieces, the installation position of the tooling support 3 with the locating pin 4 on the tooling platform 2 can be adjusted so that the locating pin 4 corresponds to the datum hole position on the workpiece drawing.

[0026] In this embodiment, the clamping mechanism 5 is disposed on the upper end of multiple tooling supports 3, and is used to apply a reliable clamping force after the workpiece is positioned. The clamping mechanism 5 in this embodiment consists of a pressure plate 51, a screw 52, ​​and a nut 53. The pressure plate 51 has a slot 54 in the middle, and the screw 52 passes through the slot 54. One end of the screw 52 is connected to the nut 53, and the other end is threadedly connected to a screw hole on the top surface of the tooling support 3. A nut 55 is also fitted on the screw 52 to limit the height of the pressure plate 51. The height of the pressure plate 51 is fixed by the opposing clamping action of the nut 55 and the nut 53. The pressure plate 51 and the positioning pin 4 together form a positioning clamping area. Except for the tooling support 3 located at the center on the second tooling platform 22, the top surface of the other tooling supports 3 is provided with a support block 56 that is detachably connected to the pressure plate 51. When the clamping tool is not in operation, one end of the pressure plate 51 is detachably connected to the support block 56. On the top surface of the tooling support 3 located at the center of the second tooling platform 22, there is a positioning pin 4 on each side of the pressure plate 51.

[0027] When the clamping fixture is in operation, rotate the pressure plate 51 above the area where the workpiece is to be clamped, and tighten the nut 53 to apply a uniform clamping force downward to the workpiece surface. Then tighten the nut 55 to fix the position of the pressure plate 51 to prevent the workpiece from shifting or vibrating during subsequent heavy cutting processes such as milling and boring.

[0028] Support rods 6 are respectively installed between two sets of adjacent tooling supports 3 on the first tooling platform 21 and on the tooling supports 3 on the third tooling platform 23. Each tooling support 3 on the first and third tooling platforms 21 and 23 has a support rod seat 61 below the pressure plate 51. The support rod 6 is placed on the support rod seat 61. The support rod 6 mainly serves to pass through the through hole in the workpiece 8 of the rotary table machine, acting as a fixator for the workpiece, and further fixing the position of the workpiece during machining in conjunction with the pressure plate 51. The support rods 6 form local frame units from the discrete tooling supports 3, enhancing the rigidity and vibration resistance of the entire tooling system. Especially in areas with long workpiece spans or large cutting loads, they can suppress the relative deflection and torsion of the tooling supports 3, improving the dynamic stability and dimensional retention capability of the clamping system during machining.

[0029] In this embodiment, the top surfaces of the first tooling platform 21, the second tooling platform 22, and the third tooling platform 23 are provided with multiple eye bolts 7 to cooperate with the workshop lifting equipment to move and position the tooling platform 2 during the tooling pre-configuration stage. After the tooling platform 2 is locked, it is finally fixed by passing through the T-slot 11 on the tooling table 1 and the inverted T-shaped connecting pin 24 on the tooling platform 2, preventing micro-displacement of the tooling platform 2 caused by processing vibration.

[0030] The working principle and method of the above-mentioned clamping fixture for rotary table machining are as follows: The first step is to determine the distribution of the bottom support points, positioning holes, and through holes based on the drawings of the workpiece 8 to be processed on the rotary table. The operator arranges the positions of the first tooling platform 21, the second tooling platform 22, and the third tooling platform 23 along the length of the T-slot 11 on the tooling table 1, and reliably locks and fixes the tooling platforms 2 using inverted T-shaped connecting pins 24 and fasteners. Then, tooling supports 3 are installed on each tooling platform 2, and the tooling supports 3 are quickly positioned and fixed using flanges 31 and bolts. By selecting and fine-tuning the installation position of the tooling supports 3, their top tooling support surfaces are made coplanar, and the tooling supports 3 with positioning pins 4 correspond to the reference positioning holes of the workpiece, completing the pre-configuration of the tooling system.

[0031] The second step involves using the workshop's lifting equipment to hoist the workpiece 8 to be processed onto the tooling table 1 and then slowly lowering it. Under the operator's guidance, the positioning holes on the workpiece are aligned with the positioning pins 4 on the tooling support 3 to ensure accurate positioning and reliable contact between the workpiece and each tooling support surface. If poor contact occurs due to manufacturing errors or welding deformation, the position of the corresponding tooling support 3 can be adjusted appropriately to achieve stress-free contact of the workpiece and ensure the accuracy of the positioning reference.

[0032] Thirdly, after the workpiece is in place, rotate the pressure plates 51 on each tooling support 3 to above the area where the workpiece needs to be clamped. Tighten the nuts 53 to apply a uniform clamping force downwards to the workpiece surface using the pressure plates 51. Then, fix the height of the pressure plates 51 by the opposing clamping action of the nuts 55 and 53 to prevent the pressure plates 51 from loosening during the cutting process. The tooling support 3 located in the center of the second tooling platform 22 has positioning pins 4 on both sides of its pressure plate 51 to further enhance the positioning accuracy of the workpiece. The other tooling supports 3 are connected to the pressure plates 51 by the support blocks 56, which facilitates adjustment and storage when not in use, and enhances clamping stability when in use.

[0033] Fourth, support rods 6 are installed between adjacent tooling supports 3 on the first tooling platform 21 and on the tooling supports 3 on the third tooling platform 23. The support rods 6 are placed through rod seats 61 and pass through the through holes of the workpiece 8 of the turntable machine to further fix the workpiece. The support rods 6 cooperate with the pressure plate 51 to prevent the workpiece from shifting or warping under cutting load, and also to form local frame units for the discrete tooling supports 3, thereby significantly improving the overall rigidity and vibration resistance of the tooling system.

[0034] The fifth step is to send the workpiece 8, together with the tooling, into the machine tool station for subsequent processing operations such as milling and boring after positioning and clamping.

[0035] Through the above structure and method, the rotary table machining clamping fixture of this embodiment achieves a modular and adjustable clamping system while maintaining machining rigidity and positioning accuracy: the fixture platform 2 undertakes macroscopic layout reconstruction, the fixture support 3 provides discrete coplanar support, the positioning pin 4 establishes a planar datum, the pressure plate 51-screw 52-nut 53 achieve efficient clamping, and the support rod 6 enhances overall vibration resistance and stability. Compared with traditional dedicated welding fixtures, this solution can quickly adapt to and compensate for errors in different models and workpieces with manufacturing errors, significantly improving machining quality and production flexibility.

[0036] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any innovative improvements or substitutions based on this utility model should fall within the scope of the claims of this utility model. Furthermore, the parameters, materials, and processes mentioned in the above embodiments are not unique. Without departing from the technical essence of this utility model, those skilled in the art can make various alternative choices, and these alternative solutions should also be considered to fall within the scope of protection of this utility model.

Claims

1. A clamping fixture for rotary table machining, characterized in that, include: work surface; At least one tooling platform, which is detachably mounted on a tooling table; Multiple tooling supports are provided, which are detachably mounted on the tooling platform, and the top of each tooling support is provided with a tooling support surface. A positioning mechanism, mounted on at least one tooling support, is used to position the workpiece of the turntable machine; as well as The clamping mechanism, mounted on the tooling support, is used to clamp and fix the turntable machine workpiece onto the tooling support surface.

2. The clamping fixture for rotary table machining according to claim 1, characterized in that, The tooling platform is provided with multiple T-slots, and the tooling platform is connected to the T-slots by fasteners.

3. The clamping fixture for rotary table machining according to claim 1, characterized in that, The tooling platform includes a first tooling platform, a second tooling platform, and a third tooling platform, which are distributed on the tooling table.

4. The clamping fixture for rotary table machining according to claim 1, characterized in that, The tooling support is a vertical structure, and its bottom is provided with a flange for fixing it to the tooling platform.

5. The clamping fixture for rotary table machining according to claim 1, characterized in that, The positioning mechanism includes at least one positioning pin for engaging with a positioning hole on the workpiece of the turntable.

6. The clamping fixture for rotary table machining according to claim 1, characterized in that, The clamping mechanism includes: Pressure plate, which is detachably mounted on the tooling support; The screw and nut; the nut is threaded with the screw and is used to drive the pressure plate to apply pressure to the workpiece of the turntable machine.

7. The clamping fixture for rotary table machining according to claim 1, characterized in that, It also includes at least one support rod, which is detachably mounted on at least one clamping mechanism.

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