A limit clamping fixture for a turntable

Abstract

This utility model discloses a limiting clamping fixture for a turntable, including a turntable, a carrier plate, and a pair of first limiting components and second limiting components. The first limiting components are disposed on the carrier plate and limit the workpiece extending along the X direction of the carrier plate in the X direction and clamp it in the Y direction; the second limiting components limit the workpiece extending along the Y direction and rotated 180 degrees in the Y direction and clamp it in the Z direction. Through the cooperation of structures such as U-shaped limiting blocks, linear drive mechanisms, lever-type hydraulic cylinders, and hydraulic angle cylinders, multi-directional precise limiting is achieved. The turntable drives the carrier plate and the workpiece to rotate, completing multi-angle machining in one clamping, improving machining continuity and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of machining, specifically to a limiting clamping fixture for a turntable. Background Technology

[0002] In the field of modern machining, rotary tables are a common type of equipment, mainly used to rotate workpieces to a specific angle for various machining operations, such as milling and drilling. They play an important role in improving machining efficiency and precision.

[0003] In traditional rotary table machining, workpiece clamping and positioning typically employ conventional methods. For example, for workpieces with relatively regular shapes, simple bolt fixing or general-purpose fixtures may be used for clamping. In more complex cases, components such as stops or limit posts with specific shapes are used to limit the workpiece from different directions, preventing displacement or wobbling during rotation and thus ensuring machining accuracy. These related techniques can, to a certain extent, meet basic machining requirements and achieve simple workpiece fixation and positioning.

[0004] However, when the workpiece to be processed has a special structure and the processing technology requires the workpiece to be clamped and processed on the turntable in different postures (such as the original state and the state after being rotated 180 degrees), how to design an efficient, reliable limit clamping fixture that can adapt to multiple postures of the workpiece and ensure its stability and positioning accuracy during the rotation process has become an urgent technical problem to be solved. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a limiting clamping fixture for a turntable. By setting a first limiting component and a second limiting component for workpieces extending in the X and Y directions respectively, the first limiting component limits the workpiece in the X direction and clamps it in the Y direction, while the second limiting component limits the workpiece in the Y direction and clamps it in the Z direction after it has been rotated 180 degrees. With the help of the turntable driving the carrier plate to rotate, multi-directional precise limiting and stable clamping of workpieces in different postures can be achieved, simplifying the fixture structure and improving versatility and processing efficiency.

[0006] Technical Solution: This utility model provides a rotary table limiting clamping fixture including a rotary table; a carrier plate, which is clamped by the rotary table and can rotate with the rotary table around its axis; a pair of first limiting components, which are disposed on the carrier plate and used to limit the workpiece extending along the X direction of the carrier plate and clamp it in the Y direction; and a second limiting component, which is disposed on the carrier plate and used to limit the pair of workpieces extending along the Y direction of the carrier plate and after being rotated, and clamp it in the Z direction. When the first and second limiting components respectively limit and clamp the corresponding workpieces, the rotary table can drive the carrier plate and the clamped workpieces to rotate to the required angle for machining. Through the rotation of the rotary table, multi-angle machining can be achieved in a single clamping operation, improving the continuity and efficiency of machining.

[0007] Furthermore, in a turntable limiting clamping fixture of this application, the first limiting component includes a first L-shaped vertical plate and a second L-shaped vertical plate spaced apart in the Y direction. The workpiece includes a stepped main body plate extending in the X direction, with a first mounting block at the upper end of the stepped shape and a second mounting block at the lower end of the stepped shape. A pair of U-shaped limiting blocks are provided on the side of the first L-shaped vertical plate facing the second L-shaped vertical plate, respectively corresponding to the upper and lower ends of the first L-shaped vertical plate. The workpiece is supported on the pair of U-shaped limiting blocks, wherein the stepped main body plate extends into the recess of the U-shaped limiting block in the X direction, and the first and second mounting blocks are respectively supported on the U-shaped limiting blocks. At this time, the stepped main body plate is located between the first L-shaped vertical plate and the second L-shaped vertical plate. A set of linear drive mechanisms is provided on the side of the second L-shaped vertical plate facing the stepped main body plate, and the output end of the linear drive mechanism is directly opposite the stepped main body plate in the Y direction. When the workpiece is placed on a pair of U-shaped limiting blocks, the output end of the linear drive mechanism extends out to abut against the workpiece and clamp it. The concave parts of the pair of U-shaped limiting blocks are set facing each other. After the stepped main plate extends into the concave part of the first U-shaped limiting block along the X direction, the concave parts set facing each other limit it in the X direction.

[0008] Furthermore, in a turntable clamping fixture of this application, the abutment block corresponds to the linear drive mechanism. The abutment block abuts against the side of the stepped main body plate facing the first L-shaped vertical plate. When the workpiece is removed, the output end of the linear drive mechanism faces the abutment block. The abutment block and the linear drive mechanism are correspondingly arranged. When the linear drive mechanism extends to clamp the stepped main body plate, the abutment block abuts against the side of the stepped main body plate facing the first L-shaped vertical plate, forming a bidirectional force-bearing structure. This structure can more firmly fix the workpiece in the first limiting assembly, effectively disperse the clamping force, avoid workpiece displacement or deformation due to uneven force, and ensure that the workpiece maintains a stable position during machining.

[0009] Furthermore, in a turntable limiting clamping fixture of this application, the second limiting component includes a pair of lever-type hydraulic cylinders and a pair of support blocks. The lever-type hydraulic cylinders and the support blocks are spaced apart in the Y direction. The second mounting block of the workpiece after being flipped is placed on the support blocks. The first mounting block of the workpiece has several mounting holes, and the corresponding mounting holes are inserted into limiting pins provided on the carrier plate. The output end of the lever-type hydraulic cylinder is provided with a clamping head for clamping the second mounting block on the support blocks in the Z direction. The second limiting component, through the cooperation of the support blocks, limiting pins, and lever-type hydraulic cylinders, achieves multiple clamping of the flipped workpiece. Dimensional Precision Positioning The support block provides a stable support surface for the second mounting block of the workpiece, ensuring the basic positioning of the workpiece in the YZ plane; the limit pin is inserted into the mounting hole of the first mounting block of the workpiece to limit the displacement of the workpiece in the plane, achieving precise positioning in the X-Y direction; the clamping head of the lever-type hydraulic cylinder clamps the second mounting block on the support block in the Z direction, completing the fixation of the workpiece in the Z direction, forming a comprehensive three-dimensional positioning system to ensure the accurate positioning of the workpiece during processing.

[0010] Furthermore, in a turntable limiting clamping fixture of this application, the second limiting component further includes a hydraulic angle cylinder. The hydraulic angle cylinder is mounted on a carrier plate and positioned between the first mounting blocks of a pair of workpieces after they have been rotated. The output end of the hydraulic angle cylinder is equipped with a pressure arm. When no workpiece is clamped, the pressure arm is parallel to the stepped main body plate. During operation, the pressure arm rotates and presses down, pressing the pair of first mounting blocks firmly onto the carrier plate in the Z direction. The rotating and pressing down action of the hydraulic angle cylinder during operation firmly presses the pair of first mounting blocks onto the carrier plate in the Z direction, creating a bidirectional clamping force with the clamping of the second mounting blocks by the lever-type hydraulic cylinder, greatly enhancing the workpiece's fixation effect in the Z direction.

[0011] Furthermore, in one rotary table limiting clamping fixture of this application, the second mounting block, after being rotated, forms an inverted U-shape, and the upper end of the support block has a protrusion, forming an overall convex shape. The concave portion of the inverted U-shape corresponds to the protrusion. In addition to support in the Z-direction, the cooperation between the inverted U-shaped concave portion and the protrusion can also limit the displacement of the workpiece in the X-direction to a certain extent.

[0012] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0013] 1. The rotary table limiting and clamping fixture of this utility model provides multi-directional limiting and clamping for both the original state and the state after being rotated 180 degrees. The first limiting component limits the workpiece in the X direction through a U-shaped limiting block, and clamps it in the Y direction through a linear drive mechanism; the second limiting component uses a support block and a limiting pin to limit the workpiece in the Y direction, and a lever-type hydraulic cylinder and a hydraulic angle cylinder to clamp it in the Z direction. Combined with the rotary table driving the carrier plate to rotate, multi-angle machining of the workpiece can be achieved without multiple clamping operations, reducing clamping time and errors, integrating traditional multi-process machining into a single clamping operation, improving efficiency, and reducing manufacturing costs. Attached Figure Description

[0014] Figure 1 A schematic diagram of the workpiece structure is attached to a limiting clamping fixture for a turntable according to this utility model;

[0015] Figure 2 This is a schematic diagram of the structure of a turntable limiting clamping fixture for removing part of a workpiece according to the present invention;

[0016] Figure 3 This is a schematic diagram of the workpiece in different states according to this utility model.

[0017] Explanation of reference numerals on the accompanying drawings:

[0018] 1-Turntable;

[0019] 2-Carrier plate, 21-Limit pin;

[0020] 3-First limiting component, 31-First L-shaped upright plate, 32-Second L-shaped upright plate, 33-U-shaped limiting block, 34-Linear drive mechanism, 35-Abutting block;

[0021] 4-Second limit assembly, 41-Lever-type hydraulic cylinder, 411-Clamping head, 42-Support block, 43-Hydraulic angle cylinder, 421-Pressure arm, 422-Protrusion;

[0022] 5-Workpiece, 51-Stepped main body plate, 52-First mounting block, 521-Mounting hole, 53-Second mounting block. Detailed Implementation

[0023] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] like Figure 1 , 2As shown, the turntable clamping fixture of this embodiment includes a turntable 1, a carrier plate 2, a pair of first limiting components 3 and a second limiting component 4. The carrier plate 2 is clamped by the turntable 1 and can rotate around its axis. The workpiece 5 to be processed has a stepped structure, the main body of which is a stepped main plate 51 extending along the X direction, with a first mounting block 52 at the upper end and a second mounting block 53 at the lower end.

[0026] Original workpiece clamping (extending in the X direction)

[0027] The first L-shaped vertical plate 31 of the first limiting component 3 has a pair of U-shaped limiting blocks 33 on the side facing the second L-shaped vertical plate 32, located at its upper and lower ends respectively. The stepped main body plate 51 of the workpiece 5 is embedded in the recess of the U-shaped limiting block 33 along the X direction, and the first mounting block 52 and the second mounting block 53 are respectively supported on the upper and lower U-shaped limiting blocks 33 to achieve X-direction limiting. At this time, the stepped main body plate 51 is located between the first L-shaped vertical plate 31 and the second L-shaped vertical plate 32;

[0028] The second L-shaped upright plate 32 has four clamping cylinders (linear drive mechanism 34) on the side facing the workpiece 5, with their output ends directly opposite the stepped main body plate 51. When the four clamping cylinders are activated simultaneously, their output ends extend along the Y direction and abut against the stepped main body plate 51. At the same time, the first L-shaped upright plate 31 has four abutment blocks 35, corresponding to the positions of the four clamping cylinders, and the abutment blocks 35 are in close contact with the side of the stepped main body plate 51 facing the first L-shaped upright plate 31. Through the thrust of the clamping cylinders and the reaction force of the abutment blocks 35, a bidirectional clamping is formed in the Y direction, ensuring that the workpiece 5 does not shift.

[0029] Flip and clamp the workpiece (extending in the Y direction).

[0030] Rotate workpiece 5 180 degrees (e.g.) Figure 3 As shown), at this time, workpiece 5 extends along the Y direction. The flipped second mounting block 53 is inverted U-shaped and placed on the support block 42 of the second limiting component 4. The upper end of the support block 42 is provided with a U-shaped protrusion 422, and the inverted U-shaped concave part fits with the protrusion 422 to limit the displacement in the X direction. The mounting hole 521 on the first mounting block 52 of workpiece 5 is inserted into the limiting pin 21 of the carrier plate 2 to achieve precise positioning in the XY direction; the output end clamping head 411 of the lever-type hydraulic cylinder 41 moves downward to press the second mounting block 53 onto the support block 42 in the Z direction. The hydraulic angle cylinder 43 is located between the first mounting blocks 52 of the pair of flipped workpieces. Its pressure arm 421 is initially parallel to the stepped main body plate 51; during operation, it rotates 90 degrees and presses down to press the pair of first mounting blocks 52 onto the carrier plate 2 in the Z direction, forming a bidirectional Z-direction clamping with the lever-type hydraulic cylinder 41.

[0031] By rotating the turntable, multi-angle machining of workpieces can be achieved in a single clamping operation, reducing the cumulative errors and clamping time caused by multiple clamping operations in traditional machining processes. This effectively improves the continuity and efficiency of machining, reduces production costs, and meets the needs of modern machining for efficient and precise machining of complex workpieces.

[0032] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A limiting clamping fixture for a turntable, characterized in that: include: Turntable (1); The carrier plate (2) is held by the turntable (1) and can rotate around its axis with the turntable (1); A pair of first limiting components (3), the first limiting components (3) are disposed on the carrier plate (2) for limiting the workpiece (5) extending along the X direction of the carrier plate (2) on the carrier plate (2) and clamping it in the Y direction; The second limiting component (4) is disposed on the carrier plate (2) and is used to limit a pair of workpieces (5) that extend along the Y direction of the carrier plate (2) and are rotated 180 degrees on the carrier plate (2) and to clamp them in the Z direction.

2. The limiting clamping fixture for a turntable according to claim 1, characterized in that, The first limiting component (3) includes a first L-shaped upright plate (31) and a second L-shaped upright plate (32) spaced apart in the Y direction. The workpiece (5) includes a stepped main body plate (51) that extends in the X direction. The upper end of the stepped main body plate (51) is provided with a first mounting block (52), and the lower end of the stepped main body plate is provided with a second mounting block (53). A pair of U-shaped limiting blocks (33) are provided on the side of the first L-shaped upright plate (31) facing the second L-shaped upright plate (32), respectively corresponding to the upper and lower ends of the first L-shaped upright plate (31). The workpiece (5) is supported by a pair of U-shaped limiting blocks (33). On the U-shaped limiting block (33), the stepped main body plate (51) extends into the recess of the U-shaped limiting block (33) along the X direction. The first mounting block (52) and the second mounting block (53) are respectively supported on the U-shaped limiting block (33). At this time, the stepped main body plate (51) is located between the first L-shaped upright plate (31) and the second L-shaped upright plate (32). The second L-shaped upright plate (32) is provided with a set of linear drive mechanisms (34) on the side facing the stepped main body plate (51). The output end of the linear drive mechanism (34) is directly opposite the stepped main body plate (51) along the Y direction.

3. The limiting clamping fixture for a turntable according to claim 2, characterized in that, The first L-shaped upright plate (31) is provided with a set of abutment blocks (35) on the side facing the second L-shaped upright plate (32). The abutment blocks (35) correspond to the linear drive mechanism (34). The abutment blocks (35) abut against the side of the stepped main plate (51) facing the first L-shaped upright plate (31). When the workpiece (5) is removed, the output end of the linear drive mechanism (34) is facing the abutment blocks (35).

4. The limiting clamping fixture for a turntable according to claim 3, characterized in that, The second limiting component (4) includes a pair of lever-type hydraulic cylinders (41) and a pair of support blocks (42). The lever-type hydraulic cylinders (41) and the support blocks (42) are spaced apart in the Y direction. The second mounting block (53) of the workpiece (5) after being rotated 180 degrees is placed on the support block (42). The first mounting block (52) of the workpiece (5) is provided with a plurality of mounting holes (521). The mounting holes (521) are inserted into the limiting pins (21) provided on the carrier plate (2). The output end of the lever-type hydraulic cylinder (41) is provided with a clamping head (411) for clamping the second mounting block (53) on the support block (42) in the Z direction.

5. The limiting clamping fixture for a turntable according to claim 4, characterized in that, The second limiting component (4) also includes a hydraulic angle cylinder (43), which is mounted on the carrier plate (2) and located between the first mounting blocks (52) of a pair of workpieces (5) after being rotated 180 degrees. The output end of the hydraulic angle cylinder (43) is provided with a pressure arm (421).

6. The limiting clamping fixture for a turntable according to claim 5, characterized in that, The second mounting block (53) is inverted U-shaped after being rotated 180 degrees. The upper end of the support block (42) is provided with a protrusion (422), and the whole is in the shape of a convex character. The concave part of the inverted U-shape corresponds to the protrusion (422).

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