Large-plane easy-to-deform product machining positioning mechanism

Abstract

The utility model discloses a large-plane easy-to-deform product machining positioning mechanism which comprises a working table top and a corresponding machining tool spindle, the working table top is provided with a profiling face capable of being attached to a positioning face of a large-plane product to be machined, and the profiling face is provided with a machining tool spindle. A plurality of vacuum adsorption channels penetrating through the working table are arranged on the profiling surface and are connected with vacuum adsorption channel pipes, and the vacuum adsorption channel pipes are connected with a vacuumizing device; at least two groups of pinch rollers are axially arranged on the machining tool main shaft and are respectively arranged in front of and behind the advancing direction of the machining tool main shaft, and in the machining process, the pinch rollers are in force contact with the machining surface of the large-plane product to be machined in the whole process. According to the utility model, multiple machining positioning is realized, so that the overall machining planeness of a product in the milling process is ensured, and the overall machining precision of the product is finally ensured.

Description

Technical Field

[0001] The utility model relates to a machining positioning mechanism for large-plane and easily deformable products. Background Art

[0002] During the machining process, machining operations such as milling the surface or milling slots are carried out on some large-plane thin-walled blank products. The existing positioning for large-plane thin-walled blank products generally uses a machining platform supplemented by fast pressing and clamping for positioning, and then milling operations are carried out. However, in the operation application, due to the easy deformation characteristics of the large-plane thin-walled blank products themselves, the flatness of the products cannot be kept consistent during the machining process, which further leads to differences between the blank surface and the machined surface, thus affecting the overall machining accuracy. Summary of the Invention

[0003] Aiming at the deficiencies in the above-mentioned prior art, the utility model provides a machining positioning mechanism for large-plane and easily deformable products, which uses multiple machining positionings to ensure the overall flatness of the products during the milling process, thereby ensuring the overall machining accuracy of the products.

[0004] To achieve the above object, the technical solution of the utility model is: A machining positioning mechanism for large-plane and easily deformable products is used for machining and positioning a large-plane product to be machined to ensure that the machined surface of the large-plane product to be machined has a consistent flatness. It includes a workbench surface and its corresponding machining tool spindle. Among them,

[0005] The workbench surface has a profiling surface that can be fitted with the positioning surface of the large-plane product to be machined, and a number of vacuum adsorption channels penetrating the workbench surface are arranged on the profiling surface. The vacuum adsorption channels are all connected with vacuum adsorption channel pipes, and the vacuum adsorption channel pipes are connected to a vacuum pumping device;

[0006] An axial pressing wheel is arranged on the machining tool spindle. The number of the pressing wheels is at least two groups, which are respectively arranged in the front and rear of the advancing direction of the machining tool spindle. During the machining process, the pressing wheels are in force contact with the machined surface of the large-plane product to be machined throughout the whole process.

[0007] Further, the pressing wheel is arranged on a pressing spindle, and the pressing spindle is arranged in parallel with the machining tool spindle, or the pressing spindle is sleeved outside the machining tool spindle. An inductive pressure sensor is arranged at the end of the pressing spindle. The pressure sensor monitors the pressure value of the pressing wheel on the machined surface in real time and transmits the data to a controller, and the controller controls the downward pressure of the pressing spindle in real time.

[0008] Further, the machining tool spindle is a milling cutter spindle.

[0009] Further, the flatness requirement of the profiling surface is 0.03 mm.

[0010] Further, each of the vacuum adsorption channel pipes is provided with an intelligent control valve, and a negative pressure sensor is arranged at the end of the vacuum adsorption channel pipe. The intelligent control valve and the negative pressure sensor are both electrically connected to the controller for control.

[0011] The beneficial effects of the present utility model: Through the combination of profiling surface positioning, negative pressure limiting by the vacuum pumping device and positive pressure limiting by the pressing wheels, multiple machining positioning is realized to ensure the overall machining flatness of the product during the milling process, achieve stable milling machining, and ultimately ensure the overall machining accuracy of the product. Description of the Drawings

[0012] Figure 1 is a schematic structural diagram of the present utility model. Detailed Embodiments

[0013] The present utility model will be further described in detail below in conjunction with specific embodiments and the drawings.

[0014] A machining positioning mechanism for large-plane easily deformable products as shown in Figure 1 is used for machining and positioning a large-plane product 3 to be processed to ensure that the machined surface of the large-plane product 3 to be processed has a consistent flatness. It includes a workbench surface 1 and its corresponding machining tool spindle 4. Among them,

[0015] The workbench surface 1 has a profiling surface that can be fitted with the positioning surface of the large-plane product 3 to be processed, and a plurality of vacuum adsorption channels penetrating the workbench surface 1 are arranged on the profiling surface. The vacuum adsorption channels are all connected to vacuum adsorption channel pipes 2, and the vacuum adsorption channel pipes 2 are connected to a vacuum pumping device;

[0016] Axially arranged on the machining tool spindle 4 are pressing wheels 6 and 7. The number of pressing wheels 6 and 7 is at least two groups, which are respectively arranged in the front and rear of the advancing direction of the machining tool spindle 4. During the machining process, the pressing wheels 6 and 7 are in force contact with the machined surface of the large-plane product 3 to be processed throughout the whole process.

[0017] This case is mainly described with the milling process of large-plane easily deformable products. Therefore, in this actual example, the machining tool spindle 4 is a milling tool spindle.

[0018] The profiling surface is specifically profiled based on the actual positioning surface of the large-plane product 3 to be processed, or can be integrally profiled or coexistently profiled according to the positioning surfaces of different large-plane products 3 to be processed to obtain a machining structure with a wider adaptation range. Usually, the flatness requirement of the profiling surface is set to 0.03 mm or a better standard to ensure the consistent flatness of the machined surface during milling.

[0019] The vacuum adsorption channels use negative pressure to adsorb and position the large flat product 3 to be processed, and a vacuum pumping device is used to pump the vacuum adsorption channels. Each vacuum adsorption channel tube 2 is provided with an intelligent control valve, and a negative pressure sensor is provided at the end of the vacuum adsorption channel tube 2. The intelligent control valve and the negative pressure sensor are both electrically controlled and connected to the controller.

[0020] The entire mechanism is provided with a controller, which uses a commercially available conventional intelligent controller to intelligently control the vacuum pumping and the downward pressure of the pressing wheels 6 and 7. Among them, the negative pressure sensor monitors the pressure of the vacuum adsorption channel tube 2 in real time. When the large flat product 3 to be processed is attached to the profiling surface, due to the inconsistent positioning contact areas between different large flat products 3 to be processed and the profiling surface, some vacuum adsorption channels may not achieve negative pressure positioning of the large flat product 3 during vacuum pumping. In this embodiment, by using the negative pressure sensor to monitor the pressure of each vacuum adsorption channel tube 2, if a vacuum adsorption channel tube that does not achieve negative pressure adsorption during the positioning process will perform a valve closing action through the controller's instruction to the intelligent control valve, thereby reducing the redundant energy loss during the positioning process.

[0021] Regarding the pressing wheels 6 and 7: The pressing wheels 6 and 7 are arranged on the pressing main shaft. The pressing main shaft is arranged parallel to the machining tool main shaft 4, or the pressing main shaft is sleeved outside the machining tool main shaft 4. An inductive pressure sensor 5 is provided at the end of the pressing main shaft. The pressure sensor 5 monitors the pressure value of the pressing wheels 6 and 7 on the machining surface in real time and transmits the data to the controller, and the controller controls the downward pressure of the pressing main shaft in real time.

[0022] The structure of the pressing main shaft can be diversified. For example, it shares the main shaft with the machining tool main shaft 4, and a structure is erected on its side to support the pressing wheels 6 and 7, and the pressing wheels 6 and 7 are force - contacted and pressed and positioned on the large flat product 3 to be processed through a telescopic shaft combined with a spring. Of course, the pressing main shaft can also be independently arranged. In order to ensure its consistency with the milling cutter, it is arranged parallel to or sleeved with the machining tool main shaft 4, and the pressing main shaft is driven by an oil cylinder or a cylinder so that the pressing wheels 6 and 7 are always in force contact with the machining surface of the large flat product 3 to be processed during the milling operation, that is, always keep pressing and positioning the large flat product 3 to be processed.

[0023] During the process, the pressure sensor 5 monitors the downward pressure data of the pressing main shaft in real time to identify whether the large flat product 3 to be processed is closely attached to the profiling surface. The controller is used to realize the pressing main shaft, that is, the pressing wheels 6 and 7 maintain a downward pressure on the large flat product 3, and at the same time, the machining tool main shaft 4 operates for milling, thereby ensuring the relative height consistency between the milling surface and the pressing surface of the whole product, and finally ensuring the overall machining accuracy of the product.

[0024] The negative pressure sensor and the inductive pressure sensor in this embodiment both adopt existing commercially available sensor products. Their working principles and uses belong to the prior art and will not be elaborated here redundantly.

[0025] The technical solutions provided by the embodiments of the present invention have been introduced in detail above. Specific examples are used in this article to elaborate on the principles and implementation manners of the embodiments of the present invention. The descriptions of the above embodiments are only applicable to helping understand the principles of the embodiments of the present invention; at the same time, for those of ordinary skill in the art, according to the embodiments of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A large flat surface easily deformable product machining positioning mechanism, used for machining positioning of a large flat surface product (3) to be machined, so as to ensure that the large flat surface product (3) to be machined has a machined surface with consistent flatness, characterized in that: It comprises a work table (1) and a corresponding machining tool spindle (4), wherein: The work surface (1) has a contoured surface that can fit with the positioning surface of the large flat product (3) to be processed, and a plurality of vacuum adsorption channels that pass through the work surface (1) are arranged on the contoured surface, and the vacuum adsorption channels are all connected to vacuum adsorption channel pipes (2), and the vacuum adsorption channel pipes (2) are connected to a vacuum pumping device; The machining tool spindle (4) is axially provided with clamping wheels (6, 7), and the number of the clamping wheels (6, 7) is at least two groups, which are arranged at the front and rear of the machining tool spindle (4) in the direction of travel, and during the machining process, the clamping wheels (6, 7) maintain force contact with the machined surface of the large flat product (3) to be processed throughout the whole process.

2. The large flat and easily deformable product machining positioning mechanism according to claim 1 is characterized by: The clamping wheels (6, 7) are arranged on a clamping spindle, and the clamping spindle is arranged in parallel with the machining tool spindle (4), or the clamping spindle sleeve is placed outside the machining tool spindle (4). An inductive pressure sensor (5) is arranged at the end of the clamping spindle. The pressure sensor (5) monitors the pressure value of the clamping wheels (6, 7) on the machining surface in real time, and transmits the data to a controller, and the controller controls the downward pressure of the clamping spindle in real time.

3. The large flat and easily deformable product machining positioning mechanism according to claim 1 is characterized by: The machining tool spindle (4) is a milling tool spindle.

4. The large flat and easily deformable product machining positioning mechanism according to claim 1 is characterized by: The flatness requirement of the contoured surface is 0.03 mm.

5. The large flat and easily deformable product machining positioning mechanism according to claim 2 is characterized by: Each of the vacuum adsorption channel tubes (2) is provided with an intelligent control valve, and a negative pressure sensor is provided at the end of the vacuum adsorption channel tube (2); the intelligent control valve and the negative pressure sensor are both electrically controlled and connected to the controller.

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