Four-axis linkage positioning and clamping tool

Abstract

The utility model belongs to the technical field of clamping tools, and particularly relates to a four-axis linkage positioning and clamping tool which comprises a clamping seat, the clamping seat and a four-axis linkage machine tool are installed through a machine tool adapter, an arc-shaped area is formed on the clamping seat, an arc-shaped surface matched with the outer diameter of a workpiece is formed on the outer side of the arc-shaped area, and the arc-shaped surface is arranged on the outer side of the arc-shaped area. A clamping block located on the inner side of the workpiece is arranged above the clamping base, the clamping block clamps the workpiece on the clamping base through a rotating air cylinder, and the clamping block and the sinking groove are distributed in a staggered mode. The arc-shaped area is matched with the outer diameter of a workpiece so that the workpiece can be conveniently positioned on the clamping base before being clamped, meanwhile, the receding hole is matched with the four-axis linkage machine tool so that a sinking groove and a through hole can be machined at the same time during single-time clamping, secondary clamping is omitted, and the machining precision is guaranteed; and secondly, the clamping blocks are arranged on the inner side of the workpiece through the rotating air cylinders, the overall size of the tool can be reduced, and clamping consistency, reliability and convenience are guaranteed through the rotating air cylinders.

Description

Technical Field

[0001] This utility model belongs to the field of clamping fixture technology, specifically relating to a four-axis linkage positioning clamping fixture. Background Technology

[0002] Positioning and clamping fixtures mounted on four-axis CNC machine tools are a type of clamping system specifically designed for four-axis machine tools. They aim to achieve high-precision positioning and clamping of workpieces while making full use of the multi-degree-of-freedom motion capabilities of four-axis CNC machine tools. This type of fixture is typically used to process workpieces with complex geometries, such as aerospace parts, automotive parts, and molds.

[0003] There is a circular part used in aerospace. Multiple sets of grooves need to be made along the circumference of its upper surface, and a stepped through hole needs to be made through the lower surface. The existing positioning fixture has poor integration with the workpiece, and the two surfaces need to be clamped twice, which is not convenient to operate and may affect the accuracy. Moreover, the clamps are located on the outside of the workpiece, and the workpiece needs to be clamped manually. First of all, the clamps are located on the outside of the workpiece, which makes the overall size of the fixture large and not conducive to multi-axis movement. Secondly, the consistency, reliability and convenience of the manual clamping method are not good.

[0004] To address the aforementioned issues, this application proposes a four-axis linkage positioning and clamping fixture. Utility Model Content

[0005] To address the aforementioned problems in the existing technology, this utility model provides a four-axis linkage positioning and clamping fixture, which features improved clamping consistency and reliability, reduced fixture size, and the ability to process both sides simultaneously.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a four-axis linkage positioning and clamping fixture, including a clamping seat, which is installed on a four-axis linkage machine tool via a machine tool adapter. The clamping seat has an arc-shaped area formed on it, and an arc-shaped surface that matches the outer diameter of the workpiece is formed on the outer side of the arc-shaped area. A clamping block located inside the workpiece is provided above the clamping seat. The clamping block clamps the workpiece on the clamping seat by a rotary cylinder. The clamping block and the countersink are staggered. An avoidance hole for through-hole machining is provided through the clamping seat.

[0007] As a preferred technical solution of this utility model, the clamping block is U-shaped and has a recessed clamping part at the front end, and a clamping bolt is fixed at the bottom of the clamping part to press against the upper surface of the workpiece.

[0008] As a preferred technical solution of this utility model, the clamping block is provided with a connecting hole for fixed connection with the output shaft of the rotary cylinder, and the clamping part is provided with a threaded hole for threaded engagement with the clamping bolt.

[0009] As a preferred embodiment of this utility model, the clamp is provided with a cylinder hole for mounting a rotary cylinder, and the rotary cylinder passes through the cylinder hole and is fixed to the clamp from the bottom by bolts.

[0010] As a preferred technical solution of this utility model, the clamping block and the rotary cylinder are provided with several groups of circumferentially distributed on the outer side of the arc-shaped area.

[0011] As a preferred embodiment of this utility model, the clamping seat is vertically distributed on the machine tool adapter seat and fixed by bolts.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting an arc-shaped area that matches the outer diameter of the workpiece, it is easy to position the workpiece before clamping on the fixture. At the same time, by setting a clearance hole and cooperating with a four-axis linkage machine tool, it can simultaneously process the countersink and through hole in a single clamping, eliminating the need for secondary clamping and ensuring processing accuracy. Secondly, by setting the clamping block inside the workpiece through a rotary cylinder, the overall size of the tooling can be reduced, and the rotary cylinder ensures clamping consistency, reliability and convenience. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0014] Figure 1 This is a schematic diagram of the structure of the present invention from the front view.

[0015] Figure 2 for Figure 1 A structural diagram viewed from below;

[0016] Figure 3 A schematic diagram of the structure with the clamps in the released state;

[0017] Figure 4 for Figure 3 A top-down view of the structure when the workpiece is placed;

[0018] Figure 5 This is a schematic diagram of the clamp structure;

[0019] Figure 6 This is a schematic diagram of the disassembled clamping block structure;

[0020] In the diagram: 1. Clamping seat; 11. Arc-shaped area; 12. Clearance hole; 13. Cylinder hole; 2. Clamping block; 21. Clamping part; 211. Threaded hole; 22. Connecting hole; 23. Clamping bolt; 3. Rotary cylinder; 4. Machine tool adapter; 5. Workpiece; 51. Countersink; 52. Through hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Example

[0023] Please see Figure 1 - Figure 6 The present invention provides the following technical solution: a four-axis linkage positioning and clamping fixture, including a clamping seat 1, which is installed on a four-axis linkage machine tool through a machine tool adapter 4. An arc-shaped area 11 is formed on the clamping seat 1, and an arc-shaped surface that matches the outer diameter of the workpiece 5 is formed on the outer side of the arc-shaped area 11. A clamping block 2 located inside the workpiece 5 is provided above the clamping seat 1. The clamping block 2 clamps the workpiece 5 on the clamping seat 1 through a rotary cylinder 3. The clamping block 2 and the countersink 51 are staggered. An avoidance hole 12 for machining a through hole 52 is provided through the clamping seat 1.

[0024] Specifically, the clamping block 2 is U-shaped and has a recessed clamping part 21 at the front end. The bottom of the clamping part 21 is fixed with a clamping bolt 23 that presses against the upper surface of the workpiece 5. In this embodiment, the recessed clamping part 21 is not easily deformed and the force transmission effect is better. The clamping bolt 23 can also adjust the clamping height by threading with the threaded hole 211.

[0025] Specifically, the clamping block 2 has a connecting hole 22 that is fixedly connected to the output shaft of the rotary cylinder 3, and the clamping part 21 has a threaded hole 211 that is threaded to the clamping bolt 23. In this embodiment, the connection between the connecting hole 22 and the output shaft of the rotary cylinder 3 can be axially inserted first through a non-centered connector, and then tightened by bolts, which improves stability.

[0026] Specifically, a cylinder hole 13 for mounting a rotary cylinder 3 is provided through the clamping seat 1. The rotary cylinder 3 passes through the cylinder hole 13 and is fixed to the clamping seat 1 from the bottom by bolts. In this embodiment, the rotary cylinder 3 is a clamping and rotating pressing cylinder. It achieves synchronous or sequential control of the three actions of clamping, rotating and pressing through air pressure drive. Its working principle is to push the piston inside the cylinder with compressed air to achieve linear motion pressing or lifting. At the same time, the linear motion is converted into rotational motion through mechanical structures such as gear rack, helical groove, etc., which drives the clamping block 2 to fix or release the workpiece 5 under the action of air pressure.

[0027] Specifically, the clamping block 2 and the rotary cylinder 3 are arranged in a circular pattern on the outer side of the arc-shaped area 11. In this embodiment, the workpiece 5 is firmly clamped by the multiple sets of clamping blocks 2 and rotary cylinder 3 arranged in a circular pattern. At the same time, the clamping block 2 also avoids the groove 51 and the through hole 52.

[0028] Specifically, the clamp 1 and the machine tool adapter 4 are perpendicularly distributed and fixed by bolts. In this embodiment, the side of the machine tool adapter 4 has a step that is fixed to the clamp 1 to ensure the stability of the connection.

[0029] The working principle and usage process of this utility model are as follows: The clamping seat 1 is machined to form a 15 that matches the outer diameter of the workpiece 5, and at the same time, a clearance hole 12 that can be adapted to the through hole 52 is opened. The clamping seat 1 passes through the cylinder hole 13 from the bottom upward and is then fixed from the bottom by bolts. The clamping bolt 23 is fixed to the bottom of the clamping part 21 through the threaded hole 211. The connecting hole 22 is matched with the output shaft of the rotary cylinder 3 and pressed and fixed by bolts.

[0030] like Figure 3 The image shows the loosened state of clamping block 2. The workpiece 5 is aligned with the arc-shaped area 11 and placed on the upper end of clamping seat 1. At this time, the rotary cylinder 3 is driven to rotate and move downward, thereby pressing the workpiece 5 onto clamping seat 1 through clamping bolt 23. A countersunk groove 51 is milled on the upper surface of the workpiece 5. Then, under the movement of the four-axis linkage machine tool, clamping seat 1 and workpiece 5 are flipped over. A through hole 52 is opened through cylinder hole 13. After processing, the workpiece 5 is flipped to the upper end of clamping seat 1. The clamping block 2 is released by rotary cylinder 3, and the workpiece 5 is removed.

[0031] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A four-axis linkage positioning and clamping fixture, including a clamping base (1), wherein the clamping base (1) is mounted to a four-axis linkage machine tool via a machine tool adapter (4), characterized in that: The clamping seat (1) has an arc-shaped area (11) formed on its outer side, and an arc-shaped surface that matches the outer diameter of the workpiece (5) is formed on the outer side of the arc-shaped area (11). A clamping block (2) located inside the workpiece (5) is provided above the clamping seat (1). The clamping block (2) clamps the workpiece (5) on the clamping seat (1) by means of a rotating cylinder (3). The clamping block (2) and the countersink (51) are staggered. An avoidance hole (12) for machining a through hole (52) is provided through the clamping seat (1).

2. The four-axis linkage positioning and clamping fixture according to claim 1, characterized in that: The clamping block (2) is U-shaped and has a recessed clamping part (21) at the front end. The bottom of the clamping part (21) is fixed with a clamping bolt (23) that presses against the upper surface of the workpiece (5).

3. The four-axis linkage positioning and clamping fixture according to claim 2, characterized in that: The clamping block (2) has a connecting hole (22) for fixed connection with the output shaft of the rotary cylinder (3), and the clamping part (21) has a threaded hole (211) for threaded engagement with the clamping bolt (23).

4. The four-axis linkage positioning and clamping fixture according to claim 1, characterized in that: The clamp (1) has a cylinder hole (13) through which a rotary cylinder (3) is installed. The rotary cylinder (3) passes through the cylinder hole (13) and is fixed to the clamp (1) from the bottom by bolts.

5. The four-axis linkage positioning and clamping fixture according to claim 1, characterized in that: The clamping block (2) and the rotary cylinder (3) are provided with several groups of circumferentially distributed on the outer side of the arc-shaped region (11).

6. The four-axis linkage positioning and clamping fixture according to claim 1, characterized in that: The clamp (1) is vertically distributed on the machine tool adapter (4) and fixed by bolts.

Images