Flexible positioning clamp for five-axis machining center

Abstract

The utility model relates to the technical field of machine tool machining, in particular to a flexible positioning clamp for a five-axis machining center, which comprises a flexible quick-change bottom plate, a plurality of groups of zero-point single bases and a zero-point system unit, the flexible quick-change bottom plate is fixedly connected onto a workbench of the five-axis machining center, the zero-point single bases are fixedly connected onto the flexible quick-change bottom plate, and the zero-point system unit is fixedly connected onto the flexible quick-change bottom plate. The zero-point system unit is fixedly installed on the zero-point single base. According to the flexible positioning clamp for the five-axis machining center, rapid installation, positioning and replacement of the clamp are achieved through a flexible lap joint method and modular design, and therefore the requirements of the semiconductor industry for efficient and accurate machining are met.

Description

Technical Field

[0001] The utility model relates to the technical field of machining beds, in particular to a flexible positioning fixture for a five-axis machining center. Background Art

[0002] In the field of semiconductor manufacturing, with the continuous advancement of technology and the diversification of products, the complexity and processing accuracy requirements of semiconductor equipment parts are increasing. These parts often have diverse shapes, sizes and material characteristics, and need to be processed with high precision on multiple surfaces to meet strict tolerance and roughness requirements. Therefore, the five-axis machining center has become a key equipment for processing such parts. It can provide five degrees of freedom of movement to achieve efficient and accurate processing of complex surfaces.

[0003] However, traditional five-axis machining centers face the challenge of frequently replacing zero-point positioning fixtures when machining semiconductor components of different sizes. Each component may require a fixture of a specific size to ensure machining accuracy, which leads to frequent and complex fixture replacement during machining. Each fixture replacement requires tedious adjustment, alignment, and testing, which not only consumes a lot of machine time and reduces the effective utilization of equipment, but also increases the risk of machining abnormalities due to improper operation.

[0004] In addition, traditional fixture designs often lack flexibility and are difficult to quickly adapt to the processing needs of parts of different sizes and shapes. This results in the need to prepare multiple sets of fixtures to cope with different processing tasks during the processing, which increases the manufacturing cost and storage space requirements of the fixtures, and also brings inconvenience to the management and maintenance of the fixtures.

[0005] Therefore, developing a flexible positioning fixture that can quickly match parts of various sizes and shapes, reduce fixture replacement time and improve processing efficiency is of great significance to improving the processing capacity and economic benefits of the five-axis machining center. It is based on this background that the present invention proposes a flexible positioning fixture for a five-axis machining center. Utility Model Content

[0006] In order to solve the above problems, the utility model provides a flexible positioning fixture for a five-axis machining center. The flexible positioning fixture for the five-axis machining center realizes rapid installation, positioning and replacement of the fixture through a flexible overlapping method and modular design, thereby meeting the semiconductor industry's needs for efficient and precise machining.

[0007] The technical solution of the utility model is as follows:

[0008] A flexible positioning fixture for a five-axis machining center, comprising a flexible quick-change bottom plate, a zero-point single base, and a zero-point system unit. The flexible quick-change bottom plate is fixedly connected to the workbench of the five-axis machining center. A number of groups of zero-point single bases are fixedly connected to the flexible quick-change bottom plate, and the zero-point system unit is fixedly installed on the zero-point single base.

[0009] The flexible quick-change bottom plate is locked to the workbench of the five-axis machining center by screws.

[0010] A center alignment hole is provided at the center of the flexible quick-change bottom plate, and the center alignment hole coincides with the Z-axis of the workbench of the five-axis machining center.

[0011] The heights of the zero-point single bases are the same, and the tolerance is less than or equal to 0.01 mm.

[0012] The zero-point single base is fixedly installed on the flexible quick-change bottom plate through a ball lock unit, and a quick interface for cooperating with the ball lock unit is provided on the flexible quick-change bottom plate.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1. A flexible positioning fixture for a five-axis machining center disclosed by the present utility model. By adopting the design of a flexible quick-change bottom plate and interchangeable zero-point single bases, this flexible positioning fixture for a five-axis machining center can quickly match semiconductor components of different sizes and shapes, reducing the frequency and complexity of fixture replacement. This flexible design enables the machining process to avoid frequent downtime for fixture adjustment, alignment, and testing, thereby significantly improving the machining efficiency of the five-axis machining center.

[0015] 2. A flexible positioning fixture for a five-axis machining center disclosed by the present utility model. This flexible positioning fixture for a five-axis machining center allows a set of flexible positioning fixtures to cover the machining requirements of multiple components, reducing the need for multiple specific fixtures, and lowering the manufacturing cost and storage space requirements of the fixtures. At the same time, once invested, it can be used for a long time, saving the cost of frequent fixture replacement and improving economic benefits.

[0016] 3. A flexible positioning fixture for a five-axis machining center disclosed by the present utility model. This flexible positioning fixture for a five-axis machining center reduces the risk of improper operation caused by frequent replacement and adjustment of fixtures, improving the stability and safety of the machining process. At the same time, the precise fixture positioning and locking mechanism also reduces the risk of collision between the machine tool spindle and tool and the fixture periphery.

[0017] 4. A flexible positioning fixture for a five-axis machining center disclosed by the present utility model. This flexible positioning fixture for a five-axis machining center improves the equipment utilization rate of the five-axis machining center by reducing the fixture replacement time and enhancing the machining efficiency. The equipment can be in the machining state for a longer time, reducing the downtime and improving the overall production efficiency and production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description of the preferred embodiments below, the solutions and advantages of the present application will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model.

[0019] In the drawings:

[0020] Figure 1 is a schematic three-dimensional structure diagram of a flexible positioning fixture for a five-axis machining center according to an embodiment of the present utility model;

[0021] Figure 2 is a schematic structure diagram of a flexible quick-change bottom plate of a flexible positioning fixture for a five-axis machining center according to an embodiment of the present utility model;

[0022] Figure 3 is Figure 2 the sectional view taken along line A-A in

[0023] Figure 4 is a schematic structure diagram of a zero-point single base of a flexible positioning fixture for a five-axis machining center according to an embodiment of the present utility model;

[0024] Figure 5 is Figure 4 the sectional view taken along line B-B in

[0025] Figure 6 is two schematic flexible installation diagrams of a flexible positioning fixture for a five-axis machining center according to an embodiment of the present utility model (each column shows after installation and before installation);

[0026] The components represented by the reference numerals in the drawings are:

[0027] For the present utility model: 1. Flexible quick-change bottom plate, 2. Zero-point single base, 3. Ball lock unit, 4. Zero-point system unit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] The flexible positioning fixture for a five-axis machining center adopts a spliced flexible overlapping method, which can transform into various flexible zero-point positioning structures to meet the clamping requirements of parts with different sizes, avoid frequent fixture replacement causing the machine to stop, quickly switch the clamping type, and can be quickly transformed like building blocks. Moreover, through high-precision mating parts, high-precision requirements for stable clamping force and repeated positioning are achieved.

[0029] As shown Figure 1 in the figure, the flexible positioning fixture for a five-axis machining center includes a flexible quick-change bottom plate 1, a zero-point single base 2, and a zero-point system unit 4. The flexible quick-change bottom plate 1 is fixedly connected to the workbench of the five-axis machining center. Several groups of zero-point single bases 2 are fixedly connected to the flexible quick-change bottom plate 1, and the zero-point system unit 4 is fixedly installed on the zero-point single base 2.

[0030] The zero-point system unit 4 is a Hoffmann zero-point quick-change system in Germany. It is pneumatically tightened through a pull stud and a zero-point positioning disk, which is also a very commonly used quick positioning and locking method in the market.

[0031] As shown Figure 2 and Figure 3 in the figure, the flexible quick-change bottom plate 1 is designed with quick-change interfaces suitable for various installation positions, facilitating the flexible lapping of the zero-point single base 2.

[0032] As shown Figure 4 and Figure 5 in the figure, the zero-point single base 2 is used after being matched with any off-the-shelf zero-point system unit 4. It is designed with an air passage inside and adopts a split structure to ensure the requirements of the hardness of the fixture base and weight reduction, facilitating operation and interchangeability.

[0033] Through the design of the quick lapping of the flexible zero-point positioning base and the flexible universal base, the present invention can be quickly installed and positioned without adjustment and testing. It can match various parts of different sizes, avoiding collisions between the machine tool spindle and the tool and the tooling during processing, which may cause the machine to crash. The present invention designs a flexible quick-change bottom plate, which can install a maximum of 6 groups of zero-point single bases at the same time. It is matched according to the sizes of different parts to be processed, with a maximum coverage range of 600X600MM, and a single zero-point single base can also be placed alone. The ball lock quick-change system is used for quick locking and positioning. While ensuring the repeat positioning accuracy, it quickly and efficiently locks the zero-point single base, ensuring that a set of flexible zero-point positioning components can cover various different zero-point positioning bases, improving the processing range.

[0034] The flexible quick-change bottom plate 1 is locked to the workbench of the five-axis machining center by screws.

[0035] A center alignment hole is provided at the center of the flexible quick-change bottom plate 1, and the center alignment hole coincides with the Z-axis of the workbench of the five-axis machining center.

[0036] The heights of the zero-point single bases 2 are the same, and the tolerance is less than or equal to 0.01mm.

[0037] The zero-point single base 2 is fixedly installed on the flexible quick-change bottom plate 1 through a ball lock unit 3, and a quick interface for cooperating with the ball lock unit 3 is provided on the flexible quick-change bottom plate 1.

[0038] The ball lock system is a product of Jergens in the United States. It is a commonly used general locking tooling in the market. It is tightened manually, locks by squeezing with a ball, and has a quick-change structure.

[0039] Specific implementation steps

[0040] 1. Lock the flexible quick-change base plate 1 to the workbench of the five-axis machining center with screws. Align the center alignment hole of the flexible quick-change base plate 1 with the Z-axis of the workbench to ensure end face runout and flatness.

[0041] 2. Install the purchased mature part positioning system unit onto the zero-point single base 2. Six units form a group, and ensure that the heights of all zero-point single bases are the same after installation, with a tolerance less than or equal to 0.01 mm. Any zero-point single base 2 can be used interchangeably.

[0042] 3. According to the size of the part to be machined, select multiple zero-point single bases 2 and install them at the required positions through the ball lock unit 3. Since corresponding marked positions are designed on the flexible quick-change base plate 1, it is convenient for the operator to quickly position and install them at specific positions. The ball lock unit 3 can both position and lock, and it does not require the use of a wrench. It can be tightened directly by hand, which is convenient and fast.

[0043] 4. After installing at the corresponding positions, it can be connected to the zero-point single base 2 through a special tooling and then can be used.

[0044] Examples before and after installation are shown in Figure 6 as follows.

[0045] Through the design of the flexible quick-change base plate 1, this flexible positioning fixture for a five-axis machining center can quickly install the zero-point single base 2 without secondary clamping and alignment, rapidly improving the machining capacity of the equipment. The initial investment can save a large amount of investment costs for fixed zero-point positioning tooling, and it is also convenient for management and maintenance.

[0046] This flexible positioning fixture for a five-axis machining center has a simple design structure, easy assembly, and convenient maintenance. It also reduces the installation difficulty for the operator and lowers the operation threshold.

[0047] This flexible positioning fixture for a five-axis machining center uses mature zero-point positioning system modules and ball lock system modules, and is used in matching with self-developed tooling, making the best use of their respective advantages, improving the equipment utilization rate and operation rate, and making the machining of five-axis equipment smoother.

Claims

1. A flexible positioning fixture for a five-axis machining center, characterized in that: The invention comprises a flexible quick-change base plate (1), a zero-point single base (2) and a zero-point system unit (4); the flexible quick-change base plate (1) is fixedly connected to a workbench of a five-axis machining center; a plurality of groups of zero-point single bases (2) are fixedly connected to the flexible quick-change base plate (1); and the zero-point system unit (4) is fixedly mounted on the zero-point single base (2).

2. The flexible positioning fixture for a five-axis machining center according to claim 1, characterized in that: The flexible quick-change base plate (1) is locked onto the workbench of the five-axis machining center by means of screws.

3. The flexible positioning fixture for a five-axis machining center according to claim 1, characterized in that: A center alignment hole is provided at the center of the flexible quick-change base plate (1), and the center alignment hole coincides with the Z axis of the worktable of the five-axis machining center.

4. The flexible positioning fixture for a five-axis machining center according to claim 1, characterized in that: The heights of all zero-point single bases (2) are consistent, with a tolerance of less than or equal to 0.01 mm.

5. The flexible positioning fixture for a five-axis machining center according to claim 1, characterized in that: The zero-point single base (2) is fixedly mounted on the flexible quick-change base plate (1) via a ball lock unit (3), and a quick interface for cooperating with the ball lock unit (3) is provided on the flexible quick-change base plate (1).

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