Vacuum suction jig for five-axis machining machine table

Abstract

The utility model discloses a vacuum suction jig for a five-axis machining machine table, which comprises a base fixed on the machine table, a first rotating shaft is rotatably mounted on the base, a second rotating shaft is rotatably mounted on the first rotating shaft, and a fixed platform synchronously rotating is mounted at the end of the second rotating shaft through an inner shaft. A rotating ring is arranged at the position, located on the outer side of the inner shaft, of the bottom of the fixing platform in a sleeving mode, a fixing ring rotating relative to the rotating ring is installed in the rotating ring in a sealed mode, the rotating ring and the fixing ring are provided with an outer air channel, the fixing ring is provided with an air inlet communicating with the outer air channel, and the rotating ring is provided with an air outlet communicating with the outer air channel. A vacuum suction jig connected with an air outlet pipeline is fixed to the fixing platform, a vacuum machine is connected with an air inlet pipeline of the fixing ring, and when the vacuum suction jig is started, the rotating ring rotates while the fixing ring is fixed, so that the problem that a connecting pipeline between the vacuum machine and the air inlet of the fixing ring is wound due to rotation of the jig is solved; and normal operation of the five-axis machining machine table is ensured.

Description

Technical Field

[0001] This utility model relates to a workpiece fixing fixture for machining, and more particularly to a vacuum suction fixture for a five-axis machining center. Background Technology

[0002] When machining easily deformable workpieces, conventional fixture fixation can easily damage the workpiece. Vacuum suction is usually used for fixation. However, when using a five-axis machining center, due to the flexibility of machining, the fixture itself often needs to rotate at multiple angles. Vacuum suction requires a vacuum machine connected to the machine through pipes. When the fixture rotates, the pipes connected to the vacuum machine will restrict the rotation of the fixture, thus failing to maximize the machining advantages of the five-axis machining center. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, this utility model provides a vacuum suction fixture for a five-axis machining center.

[0004] The technical solution adopted by this utility model to solve its technical problem is:

[0005] A vacuum suction fixture for a five-axis machining center includes a base fixed to the machine base, a first rotating shaft rotatably mounted on the base, a second rotating shaft rotatably mounted on the first rotating shaft, a synchronously rotating fixed platform mounted on the end of the second rotating shaft via an inner shaft, a rotating ring fitted around the bottom of the fixed platform outside the inner shaft, a fixed ring rotatably mounted relative to the rotating ring and sealed inside the rotating ring, an external air passage provided between the rotating ring and the fixed ring, an air inlet communicating with the external air passage on the fixed ring, an air outlet communicating with the external air passage on the rotating ring, and a vacuum suction fixture fixed on the fixed platform and connected to the air outlet pipe.

[0006] An inner air passage is provided inside the fixed ring, and the air inlet is connected to the inner air passage. A connecting hole is provided on the fixed ring to connect the inner air passage and the outer air passage.

[0007] An annular gap is provided between the fixed ring and the rotating ring, and the annular gap is the external air passage.

[0008] The fixed ring and the two ends of the rotating ring are sealed together.

[0009] The fixed ring is provided with a plurality of threaded holes, and a clamping screw is installed in the threaded hole. The inner shaft is provided with an annular groove corresponding to the position of the threaded hole. When the end of the clamping screw presses against the bottom of the annular groove, the fixed ring and the inner shaft rotate synchronously.

[0010] A limiting component is installed on the base, and a pin is provided on the limiting component. A limiting hole is provided on the fixing ring, and the pin is inserted into the limiting hole.

[0011] The beneficial effects of this utility model are as follows: In this embodiment, a first rotating shaft is rotatably mounted on the base, and a second rotating shaft is rotatably mounted on the first rotating shaft. A fixed platform that rotates synchronously is mounted on the end of the second rotating shaft via an inner shaft. A rotating ring is fitted on the bottom of the fixed platform outside the inner shaft. A fixed ring that rotates relative to the rotating ring is sealed inside the rotating ring. An external air passage is provided between the rotating ring and the fixed ring. An air inlet communicating with the external air passage is provided on the fixed ring, and an air outlet communicating with the external air passage is provided on the rotating ring. A vacuum suction fixture connected to the air outlet pipe is fixed on the fixed platform. The vacuum machine is connected to the air inlet pipe of the fixed ring. When started, the second rotating shaft drives the rotating ring to rotate sequentially through the inner shaft and the fixed platform, while the fixed ring remains stationary. This avoids problems such as pipe entanglement caused by the rotation of the fixture in the connecting pipe between the vacuum machine and the air inlet of the fixed ring, ensuring that the five-axis machining center can operate normally. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0013] Figure 1 This is a structural diagram of the present invention;

[0014] Figure 2 This is an exploded view of the present invention. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0016] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0017] The following describes some embodiments of the present invention with reference to the accompanying drawings.

[0018] Reference Figure 1-2A vacuum suction fixture for a five-axis machining center includes a base 1 fixed to the machine base. A first rotating shaft 2 is rotatably mounted on the base 1, and a second rotating shaft 3 is rotatably mounted on the first rotating shaft 2. A synchronously rotating fixed platform 5 is mounted on the end of the second rotating shaft 3 via an inner shaft 4. A rotating ring 6 is fitted around the bottom of the fixed platform 5, located outside the inner shaft 4. A fixed ring 7, rotating relative to the rotating ring 6, is sealed inside the rotating ring 6. External air passages are provided between the rotating ring 6 and the fixed ring 7. An air inlet 8 communicating with the external air passages is provided on the fixed ring 7. An air inlet 8 communicating with the external air passages is provided on the rotating ring 6. The air outlet 9 is connected to the air passage. A vacuum suction fixture 10 connected to the air outlet 9 is fixed on the fixed platform 5 (the vacuum suction fixture 10 is provided with a corresponding fixture air passage, which is adjusted according to the characteristics of the product and belongs to the prior art). The vacuum machine is connected to the air inlet 8 of the fixed ring 7. When started, the second rotating shaft 3 drives the rotating ring 6 to rotate through the inner shaft 4 and the fixed platform 5 in sequence, while the fixed ring 7 remains stationary. This avoids problems such as pipe entanglement caused by the rotation of the fixture in the connecting pipe between the vacuum machine and the air inlet 8 of the fixed ring 7, and ensures that the five-axis machining center can operate normally.

[0019] A five-axis machining center has five coordinate axes, typically including three linear coordinate axes and two rotary coordinate axes. The sliding of the tool occurs on the three linear coordinate axes, while the rotation of the first rotary axis 2 and the second rotary axis 3 occurs on the rotary coordinate axes. During the machining process, the five-axis machining center can achieve linkage control of the five coordinate axes, so that the tool forms a complex motion trajectory in space relative to the workpiece, thereby enabling the machining of parts with various complex shapes.

[0020] The fixed ring 7 is provided with an inner air passage, and the air inlet 8 is connected to the inner air passage. The fixed ring 7 is provided with a connecting hole 11 that connects the inner air passage and the outer air passage. An annular gap is provided between the fixed ring 7 and the rotating ring 6, and the annular gap is the outer air passage.

[0021] The complete air duct of this vacuum suction device is as follows: the air outlet 9 of the vacuum suction device 10, which connects to the external air duct, is connected via an external pipe (e.g., Figure 1 As shown in A), this allows the fixture air passage to connect with the external air passage, and the external air passage to connect with the internal air passage through the connecting hole 11, thereby forming a complete air passage.

[0022] In this application, the processing of the internal air passage and the fixture air passage of the vacuum suction fixture 10, as well as the corresponding sealing, are conventional technologies.

[0023] The fixed ring 7 and the two ends of the rotating ring 6 are sealed together. The two ends of the fixed ring 7 and the rotating ring 6 are sealed by installing a sealing ring. When the fixed ring 7 and the rotating ring 6 are assembled together, the sealing ring is compressed, thereby forming a seal between the fixed ring 7 and the rotating ring 6. This method has a simple structure and low cost, and is suitable for situations with low pressure and low speed. According to the working conditions, such as temperature, pressure, speed, etc., a suitable sealing ring material can be selected. For example, a material with a low coefficient of friction and good wear resistance can be selected to reduce the friction between the sealing ring and the fixed ring 7 and the rotating ring 6, and avoid jamming due to excessive friction.

[0024] A limiting member 14 is installed on the base 1, and a pin 15 is provided on the limiting member 14. A limiting hole is provided on the fixing ring 7, and the pin 15 is inserted into the limiting hole.

[0025] The movement process of this fixture:

[0026] When the first rotating shaft 2 rotates, the second rotating shaft 3 and all components installed on the second rotating shaft 3 swing synchronously. When the second rotating shaft 3 rotates, it drives the inner shaft 4 to rotate, and the inner shaft 4 drives the fixed platform 5, thereby causing the rotating ring 6 to rotate synchronously. The limiting member 14 restricts the rotation of the fixed ring 7, thereby achieving the effect of relative rotation between the rotating ring 6 and the fixed ring 7. The vacuum machine's pipes are installed on the fixed ring 7. Since the fixed ring 7 does not rotate relative to the machine itself, the problem of pipe entanglement is avoided.

[0027] The fixed ring 7 is provided with a plurality of threaded holes 12, and a clamping screw is installed in the internal thread of the threaded hole 12. The inner shaft 4 is provided with an annular groove 13 corresponding to the position of the threaded hole 12. When the end of the clamping screw presses against the bottom of the annular groove 13, the fixed ring 7 and the inner shaft 4 rotate synchronously.

[0028] When the relative rotation between the rotating ring 6 and the fixed ring 7 is not required, such as when the vacuum suction fixture 10 in this fixture is replaced with a conventional clamping fixture, the clamping screw is tightened so that the rotating ring 6 and the fixed ring 7 are clamped to the annular groove 13 through the clamping screw. At this time, the rotating ring 6 and the fixed ring 7 can rotate synchronously. In addition, the pin 15 needs to be removed from the limiting hole.

[0029] This fixture can solve the problem of vacuum machine pipe entanglement when using vacuum suction for fixation, and can also be used with conventional clamping fixtures, making it widely applicable.

[0030] When vacuum suction is used for fixing, the rotating ring 6 and the fixed ring 7 need to achieve relative rotation, which requires overcoming the friction between them, resulting in energy consumption. However, when using a conventional clamping fixture, the rotating ring 6 and the fixed ring 7 can be considered as a single component, eliminating the need to overcome friction and reducing energy consumption. Furthermore, using a clamping fixture reduces friction between the rotating ring 6, the fixed ring 7, and the sealing ring, minimizing wear and extending service life.

[0031] The vacuum suction fixture 10 comprises a mounting base and a mold component adapted to the workpiece, fixed on the mounting base. When the mold component is installed, a positioning element (such as a positioning device) needs to be installed on the mounting base first. Figure 1 As shown in B), the mold part is then positioned and fixed using the positioning component, thereby improving the installation accuracy of the mold part and thus improving the processing accuracy of the product.

[0032] In this invention, the term "multiple" refers to two or more items unless otherwise expressly defined. The term "and / or" as used herein includes any and all combinations of one or more of the related listed items. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] It should be noted that when a component is referred to as being "assembled on," "mounted on," "fixed to," or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0034] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A vacuum suction jig for a five-axis machining machine table, comprising a base (1) fixed to the machine table, characterized in that The base (1) is provided with a first rotating shaft (2) rotatably installed thereon, the first rotating shaft (2) is provided with a second rotating shaft (3) rotatably installed thereon, the end of the second rotating shaft (3) is provided with a fixed platform (5) rotatably installed through an inner shaft (4), the bottom of the fixed platform (5) is provided with a rotating ring (6) sleeved outside the outer side of the inner shaft (4), the fixed ring (7) is sealingly installed in the rotating ring (6) and rotates relative to the rotating ring (6), the rotating ring (6) and the fixed ring (7) are provided with an outer air channel, the fixed ring (7) is provided with an air inlet (8) communicated with the outer air channel, the rotating ring (6) is provided with an air outlet (9) communicated with the outer air channel, and the fixed platform (5) is fixedly provided with a vacuum suction jig (10) connected with the air outlet (9) in a pipeline manner.

2. The vacuum suction jig for a five-axis machining table according to claim 1, characterized by The fixed ring (7) is provided with an inner air channel, the air inlet (8) is communicated with the inner air channel, and the fixed ring (7) is provided with a communication hole (11) for communicating the inner air channel and the outer air channel.

3. The vacuum suction jig for a five-axis machining table according to claim 1, characterized by The fixed ring (7) and the rotating ring (6) are provided with an annular gap, and the annular gap is the outer air channel.

4. The vacuum suction jig for a five-axis machining table according to claim 1 or 3, characterized by The fixed ring (7) and the rotating ring (6) are sealingly connected between the two end portions.

5. The vacuum suction jig for a five-axis machining table according to claim 1, characterized by The fixed ring (7) is provided with a plurality of threaded holes (12), the threaded holes (12) are provided with clamping screws threadedly installed therein, the inner shaft (4) is provided with an annular groove (13) corresponding to the position of the threaded hole (12), when the end portion of the clamping screw is pressed against the bottom of the annular groove (13), the fixed ring (7) and the inner shaft (4) rotate synchronously.

6. The vacuum suction jig for a five-axis machining table according to claim 1, characterized by The base (1) is provided with a limiting piece (14), the limiting piece (14) is provided with a latch (15), and the fixed ring (7) is provided with a limiting hole, the latch (15) is inserted into the limiting hole.

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