Vacuum clamp for machining thin-wall structure

Abstract

The utility model discloses a vacuum clamp for machining a thin-wall structure, and relates to the technical field of tool clamps, the vacuum clamp comprises a base, the base is provided with a plurality of supporting bosses used for supporting the bottom face of a to-be-machined thin-wall part and a side wall support used for supporting the side face of the to-be-machined thin-wall part, and air holes are formed in the surfaces of the supporting bosses; airflow channels are formed in the supporting bosses, a ventilation pipe is connected between the airflow channels of the adjacent supporting bosses, and a connector used for being connected with a vacuum pump is arranged on any supporting boss. The multiple supporting bosses capable of forming vacuum adsorption are arranged on the base to replace a traditional pressing block to clamp and fix a workpiece, the thin-wall part can be evenly stressed in the machining process, the problem that the thin-wall part is deformed by a clamp in the milling process is solved, and the beneficial effects of being simple in structure and easy to achieve and popularize are achieved.

Description

Technical Field

[0001] This application relates to the technical field of tooling fixtures, and particularly to a vacuum fixture for machining thin-walled structures. Background Art

[0002] For the machining of thin-walled parts at present, first use the tooling fixtures set on the machine tool to clamp the parts, and then carry out various forms of machining. Traditionally, the methods of side clamping, bottom jacking, and top pressing are mostly used. Due to the characteristics of thin-walled parts, the shell is thin, the weight is light, and it cannot bear too much clamping force, which is likely to cause vibration during the machining of the parts, unable to reach the machining accuracy, and even result in defective products in severe cases. Utility Model Content

[0003] The main purpose of this application is to provide a vacuum fixture for machining thin-walled structures, aiming to solve the above-mentioned existing technical problems.

[0004] The technical solution adopted in this application is as follows:

[0005] A vacuum fixture for machining thin-walled structures includes a base. A plurality of support bosses for supporting the bottom surface of the thin-walled part to be machined and a side surround bracket for supporting the side surface of the thin-walled part to be machined are arranged on the base. Air holes are arranged on the surface of the support bosses, an air flow channel is arranged inside the support bosses, a ventilation pipe is connected between the air flow channels of adjacent support bosses, and a connector for connecting a vacuum pump is arranged on any one of the support bosses.

[0006] Optionally, a plurality of interconnected annular grooves are arranged on the surface of the support bosses, and the annular grooves are communicated with the air holes on the surface of the corresponding support bosses.

[0007] Optionally, a plurality of positioning bosses are arranged on the base and the side surround bracket.

[0008] Optionally, a plurality of mounting seats for connecting with the machine tool are arranged on the base, and bolt connection holes are arranged on the mounting seats.

[0009] Optionally, a plurality of lifting rings are arranged on the base.

[0010] Compared with the prior art, the beneficial effects of this application are as follows:

[0011] A vacuum fixture for machining thin-walled structures proposed in the embodiment of this application uses a plurality of support bosses capable of forming vacuum adsorption on the base to replace the traditional clamp for clamping and fixing the workpiece. During the machining process, the thin-walled parts can be uniformly stressed, thereby solving the problem that the thin-walled parts are deformed by the fixture during milling machining, and also having the characteristics of simple structure, easy implementation and popularization. Description of the Drawings

[0012] Figure 1 This is a schematic structural diagram of the vacuum fixture for processing thin-walled structures provided by the embodiments of the present application from a perspective.

[0013] Explanation of reference numerals in the drawings:

[0014] 1 - Base, 2 - Mounting seat, 3 - Hoop, 4 - Support boss, 5 - Side surround bracket, 6 - Positioning boss, 7 - Air hole, 8 - Vent pipe, 9 - Annular groove, 10 - Connector. Detailed implementation manners

[0015] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0016] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0017] In the present application, unless otherwise clearly specified and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0018] In addition, if the embodiments of the present application involve descriptions such as "first" and "second", the descriptions of "first", "second", etc. are for descriptive purposes only, and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and / or" appearing throughout the text includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present application.

[0019] Referring to the attached Figure 1 , the embodiments of the present application provide a vacuum fixture for machining thin-walled structures, which is particularly suitable for machining thin-walled parts such as those with right angles and fold angles. The vacuum fixture specifically includes a base 1, and the base 1 is designed with a corresponding outer contour according to the bottom shape of the thin-walled part to be machined. In this application, the base 1 is taken as an example of a square plate. At the four bottom corners of the base 1, mounting seats 2 are fixedly connected by bolts. Bolt holes are provided on the mounting seats 2, and the bolt holes are used to install bolts to fix the base 1 on the workbench of the machine tool. This vacuum fixture of this embodiment is usually used to clamp thin-walled parts with larger sizes. To facilitate the installation of the vacuum fixture on the machine tool workbench, lifting rings 3 are provided at the four top corners of the base 1, and the vacuum fixture can be conveniently lifted and installed on the machine tool workbench through the lifting rings 3.

[0020] As described above, a number of support bosses 4 for supporting the bottom surface of the thin-walled part to be machined and a side surround bracket 5 for supporting the side surface of the thin-walled part to be machined are provided on the base 1. During machining, the two surfaces supported by the support bosses 4 and the side surround bracket 5 are perpendicular to each other in space, so as to facilitate the placement of thin-walled parts such as those with right angles and fold angles. In order to fix the thin-walled part placed on the support bosses 4 and the side surround bracket 5 to the base 1 and the side surround bracket 5, a number of positioning bosses 6 are provided on the base 1 and the side surround bracket 5, and bolt holes are provided on the positioning bosses 6. It can be imagined that process bosses will be set during machining of the part. When specifically installing the part to be machined on the vacuum fixture, the process boss and the positioning boss 6 are threadedly connected by bolts, so as to realize the positioning and installation of the part to be machined on the vacuum fixture.

[0021] To achieve the support for thin-walled parts, in this embodiment, air holes 7 are centrally arranged on the surface of the support boss 4. There is an air flow channel inside the support boss 4, and the air holes 7 are connected to the air flow channel. An air pipe 8 is connected between the air flow channels of adjacent support bosses 4. A connector 10 for connecting a vacuum pump is arranged on any one of the support bosses 4, and the connector 10 is communicated with the air flow channel of the support boss 4 where it is located. It can be imagined that by turning on the vacuum pump to generate negative pressure, the workpiece is adsorbed on the support boss 4, thereby forming a support for the thin-walled part and avoiding vibration of the part during processing. Of course, after the bottom surface processing is completed, the side surface can also be adsorbed on the support boss 4 for processing.

[0022] In a preferred embodiment, in order to achieve better support for the thin-walled part and enable the thin-walled part to be better adsorbed on the support boss 4, as Figure 1 shown, a number of interconnected annular grooves 9 are arranged on the surface of the support boss 4. The annular grooves 9 are arranged in circles around the air hole 7 as the center, and the annular grooves 9 are communicated with the air holes 7 on the surface of the support boss 4 where they are located, so as to form a negative pressure environment in a larger range on the surface of the support boss 4, increase the area of negative pressure adsorption of the thin-walled part, and thus enable the thin-walled part to be better adsorbed on the support boss 4.

[0023] In summary, the embodiment of the present application provides a vacuum fixture for machining thin-walled structures. When machining thin-walled parts, a number of support bosses capable of forming vacuum adsorption are arranged on the base to replace the traditional clamp for clamping and fixing the workpiece. During the machining process, the thin-walled parts can be uniformly stressed, thereby solving the problem of deformation of the thin-walled parts caused by the fixture during milling machining. It also has the characteristics of simple structure, easy implementation and popularization.

[0024] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A vacuum fixture for machining thin-walled structures, characterized in that, It includes a base, on which there are provided several supporting bosses for supporting the bottom surface of the thin-walled part to be machined and a side wall bracket for supporting the side surface of the thin-walled part to be machined. Air holes are provided on the surface of the supporting bosses, and an air flow channel is provided inside the supporting bosses. A ventilation pipe is connected between the air flow channels of adjacent supporting bosses, and a connector for connecting a vacuum pump is provided on any one of the supporting bosses.

2. The vacuum fixture for processing thin-walled structures according to claim 1, characterized in that, Several interconnected annular grooves are provided on the surface of the supporting boss, and the annular grooves are communicated with the air holes on the surface of the corresponding supporting boss.

3. The vacuum fixture for machining thin-walled structures according to claim 1, wherein Several positioning bosses are provided on the base and the side wall bracket.

4. The vacuum fixture for processing thin-walled structures according to claim 1, wherein, Several mounting seats for connecting to a machine tool are provided on the base, and bolt connection holes are provided on the mounting seats.

5. The vacuum fixture for machining thin-walled structures according to claim 1, wherein Several lifting rings are provided on the base.

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