Aluminum alloy pipe machining clamp

Abstract

The utility model discloses a kind of aluminium alloy pipe processing clamps, including movable clamping mechanism and fixed overturning mechanism. Movable clamping mechanism is made of upper die and lower die, and the profiling groove for accommodating aluminium alloy pipe is equipped between the two, and aluminium alloy pipe is fixed by bolt locking, and the first air-avoiding opening for tool to enter processing is equipped in lower die. Fixed overturning mechanism includes mounting plate, pressing cylinder and rotary table, and lower die is arranged in the front of mounting plate, and the second air-avoiding opening leading to first air-avoiding opening is equipped in the back of mounting plate. When processing, aluminium alloy pipe is first locked and fixed in profiling groove, then movable clamping mechanism is fixed on mounting plate using pressing cylinder, and finally mounting plate is overturned to back up by rotary table, so that tool sequentially passes through second air-avoiding opening and first air-avoiding opening to process aluminium alloy pipe. The utility model is cooperated by movable clamping and overall overturning, realizes workpiece reference uniformity and stable clamping, effectively improves processing precision, surface quality and production efficiency, and is especially suitable for high-precision batch processing of thin-walled pipe fittings.

Description

Technical Field

[0001] This utility model relates to the field of machining fixture technology, and in particular to a machining fixture for aluminum alloy tubes. Background Technology

[0002] Currently, CNC machining of aluminum alloy tubular parts, such as electronic cigarette tubes, typically employs the traditional front-side machining method. This involves the workpiece being positioned in a fixture, with the cutting tool directly cutting from the front. This conventional method has significant technical limitations: First, because the fixture's positioning reference and the machining program's reference are difficult to maintain perfect consistency, and the workpiece is prone to micro-displacement during machining due to clamping or cutting forces, the resulting product exhibits uneven inner wall thickness and unstable dimensional accuracy, failing to meet high-standard sealing performance requirements. Second, during front-side machining, the workpiece is suspended in mid-air, lacking sufficient rigid support, making it prone to vibration during processing. This results in surface texture marks and insufficient smoothness, affecting the product's appearance and quality. Furthermore, interchangeable fixture plates used to improve efficiency, due to inherent manufacturing and debugging errors, further amplify machining deviations when used on different machines or in different batches, leading to low product yield rates and the inability to achieve stable mass production. Frequent debugging and clamping also reduce production efficiency and increase production costs. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an aluminum alloy tube processing fixture that, through the coordinated action of movable clamping and overall flipping, achieves unified workpiece datum and stable clamping, effectively improving the processing accuracy and production efficiency of aluminum alloy tubes.

[0004] The technical solution adopted by this utility model to solve its technical problem is: An aluminum alloy tube processing fixture, comprising The movable clamping mechanism includes an upper die and a lower die. A contour groove for accommodating an aluminum alloy tube is provided between the upper die and the lower die. The upper die and the lower die are locked together by bolts to fix the aluminum alloy tube. The lower die is provided with a first clearance opening for the cutting tool to enter and process. The fixed flipping mechanism includes a mounting plate, a clamping cylinder for fixing the movable clamping mechanism on the mounting plate, and a turntable for driving the mounting plate to rotate. The lower mold is disposed on one side of the front of the mounting plate, and the back of the mounting plate is provided with a second clearance opening leading to the first clearance opening. During processing, the aluminum alloy tube is first placed in the contour groove, and the upper mold and the lower mold are locked with bolts to fix the aluminum alloy tube. Then, the movable clamping mechanism is fixed on the mounting plate by the clamping cylinder. Subsequently, the mounting plate is flipped to face up by the turntable, so that the cutting tool passes through the second clearance opening and the first clearance opening in sequence to process the aluminum alloy tube.

[0005] A machining fixture for aluminum alloy tubes according to an embodiment of this utility model has at least the following beneficial effects: Through the coordinated operation of the movable clamping mechanism and the fixed flipping mechanism, the datum consistency of the workpiece during clamping and machining is achieved, effectively avoiding cumulative errors caused by multiple clamping or datum conversions. The workpiece is stably constrained in the contour groove, and the machining area is fully exposed through flipping, enhancing rigidity during machining and significantly improving dimensional accuracy and surface quality. This structure is particularly suitable for high-precision, batch-stable machining of thin-walled aluminum alloy tube parts. Simultaneously, the flipping machining method makes operation more convenient and safer, providing a good foundation for the integration of automated production lines, and possessing good versatility and adaptability.

[0006] According to some embodiments of the present invention, the contour groove includes an upper contour groove disposed on the upper mold and a lower contour groove disposed on the lower mold.

[0007] The advantages are: the split upper and lower groove structure makes it easier to put in and take out the workpiece, and after the mold is closed, it can form a complete cavity to wrap the workpiece, providing uniform constraint force, which is conducive to improving positioning accuracy and clamping stability. This split design also facilitates the processing and manufacturing of the contour groove and its subsequent maintenance and replacement, reducing the manufacturing and use costs of the fixture.

[0008] According to some embodiments of this utility model, two contour grooves are provided in parallel between the upper mold and the lower mold.

[0009] The advantages are: it enables simultaneous processing at two workstations, allowing two workpieces to be fixed in one clamping, which significantly improves the production efficiency of a single processing cycle and is suitable for batch production scenarios. At the same time, the two workstations share the same positioning reference, ensuring the consistency of processed products and reducing equipment occupation and operator workload.

[0010] According to some embodiments of the present invention, one side of the upper mold and the lower mold is provided with a first positioning hole, and the other side is provided with a corresponding first positioning pin.

[0011] The advantages are: it ensures the accurate relative position of the upper and lower molds when they are closed, avoids workpiece positioning deviation or clamping damage caused by misalignment, improves the repeatability and reliability of clamping, and this positioning structure is simple and effective, facilitates quick mold closing operation, reduces the technical requirements for operators, and improves assembly efficiency.

[0012] According to some embodiments of this utility model, the width of the lower mold is greater than the width of the upper mold, and the pressing cylinders are respectively arranged on both sides of the second clearance opening to press the top surfaces of both sides of the lower mold.

[0013] The benefits are: the increased effective area of ​​the clamping cylinder makes the clamping force distribution more uniform, ensures the rigidity and stability of the connection between the movable clamping mechanism and the mounting plate, effectively suppresses machining vibration, and the widened lower die design provides a more stable support foundation, further enhancing the deformation resistance of the entire fixture system when subjected to cutting forces.

[0014] According to some embodiments of this utility model, the movable clamping mechanism is provided in two sets, and the second clearance opening is provided in two parallel positions on the mounting plate.

[0015] The advantages are: it supports two sets of fixtures to work at the same time, realizes parallel operation of two workstations, makes full use of the working stroke of the processing equipment, and greatly improves the output per unit time. This modular layout makes the production organization more flexible, and different numbers of workstations can be configured according to product needs, which improves the utilization rate of equipment and the flexibility of production organization.

[0016] According to some embodiments of this utility model, there are three clamping cylinders, which are respectively arranged on the outside of the second air-avoiding port and between the two second air-avoiding ports.

[0017] The advantages are: the three-point clamping method provides balanced and sufficient clamping force for the two sets of movable clamping mechanisms set side by side, ensuring the common stability of each station during the processing. This optimized clamping point layout effectively prevents fixture deformation or displacement caused by uneven clamping force, ensuring the consistency of processing accuracy.

[0018] According to some embodiments of the present invention, the clamping cylinder located outside the second clearance opening includes a cylinder body and an L-shaped pressure rod. The cylinder body drives the L-shaped pressure rod to clamp the movable clamping mechanism on the adjacent side.

[0019] The advantages are: the L-shaped pressure bar structure can effectively overcome spatial obstacles and accurately apply the clamping force to the designated area of ​​the lower die. The structure is compact and the clamping is reliable. This design optimizes the installation position of the cylinder, avoids interference with the processing area, and provides more operating space, which facilitates the assembly, disassembly and maintenance of the workpiece.

[0020] According to some embodiments of the present invention, the clamping cylinder located between the second clearance openings includes a cylinder body and a T-shaped pressure rod. The cylinder body drives the T-shaped pressure rod to simultaneously clamp the movable clamping mechanisms on both sides.

[0021] The advantages are: a single cylinder simultaneously clamps two adjacent movable clamping mechanisms, simplifying the layout of the air circuit and control system, improving clamping efficiency, and ensuring the balance of clamping force in the middle area. This integrated clamping solution reduces the number of components, lowers costs, and improves the system's response speed and reliability.

[0022] According to some embodiments of the present invention, the mounting plate is provided with a second positioning pin, and the lower mold is provided with a second positioning hole corresponding to the second positioning pin.

[0023] The advantages are: it enables precise positioning and rapid installation of the movable clamping mechanism on the mounting plate, eliminates positional uncertainty during installation, and ensures positional consistency between multiple sets of fixtures and between the fixtures and the machine tool coordinate system. This positioning method facilitates rapid production changeover, greatly reduces production preparation time, and improves the response speed of the production line.

[0024] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of an embodiment of the present utility model; Figure 2 for Figure 1 A diagram of the back of the building; Figure 3 for Figure 1 A schematic diagram showing the removal of the movable clamping mechanism; Figure 4 for Figure 1 An exploded view of the movable clamping mechanism.

[0027] Reference numerals: Upper mold 100, Lower mold 110, Contour groove 120, Bolt 130, First clearance opening 140, Mounting plate 150, Second clearance opening 160, Upper groove 170, Lower groove 180, First positioning hole 190, First positioning pin 200, Cylinder body 210, L-shaped pressure rod 220, T-shaped pressure rod 230, Second positioning hole 240, Second positioning pin 250. Detailed Implementation

[0028] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0029] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0030] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0031] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] The following is for reference. Figures 1-4 A specific embodiment of an aluminum alloy tube machining fixture is described in detail below. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.

[0033] like Figure 1 As shown, this aluminum alloy tube processing fixture mainly consists of two parts: a movable clamping mechanism and a fixed flipping mechanism. The core of the movable clamping mechanism is the upper die 100 and the lower die 110, as shown... Figure 4As shown, the two molds cooperate through a precision contour groove 120 to form a complete cavity. This contour groove 120 is composed of an upper contour groove 170 on the upper mold 100 and a lower contour groove 180 on the lower mold 110. This split structure not only facilitates the insertion and removal of workpieces but also forms a complete enclosure after mold closing, providing uniform constraint force and significantly improving positioning accuracy and clamping stability. In practical applications, two contour grooves 120 can be arranged in parallel to achieve simultaneous processing at two stations. Two workpieces can be fixed in one clamping, greatly improving production efficiency. To ensure the accuracy of mold closing between the upper mold 100 and the lower mold 110, a first positioning hole 190 is provided on one side, and a corresponding first positioning pin 200 is provided on the other side. This positioning structure effectively avoids workpiece positioning deviation caused by misalignment, improving the repeatability of clamping and operational reliability. The lower mold 110 is provided with a first clearance opening 140 for the cutting tool to enter and process. Its width is designed to be greater than that of the upper mold 100, which provides a better working area for subsequent clamping.

[0034] like Figure 3 As shown, the fixed flipping mechanism includes a mounting plate 150, a clamping cylinder, and a turntable (not shown in the figure). The front of the mounting plate 150 is used to mount the movable clamping mechanism, and the back has a second clearance opening 160 leading to the first clearance opening 140. To achieve precise positioning, the mounting plate 150 is provided with a second positioning pin 250, such as... Figure 4 As shown, the lower die 110 is provided with corresponding second positioning holes 240. This positioning method eliminates uncertainties during installation and ensures the positional consistency between multiple sets of fixtures and between the fixtures and the machine tool coordinate system. The clamping cylinders are used to firmly fix the movable clamping mechanism to the mounting plate 150. The widened design of the lower die 110 allows the clamping cylinders to be positioned on both sides of the second clearance opening 160 to clamp the top surfaces of both sides of the lower die 110. This layout makes the clamping force distribution more uniform, ensuring connection rigidity and stability, and effectively suppressing machining vibration. When there are two sets of movable clamping mechanisms, two second clearance openings 160 are arranged side-by-side on the mounting plate 150, and three clamping cylinders are correspondingly arranged, located on the outer side of the second clearance opening 160 and between the two second clearance openings 160, respectively. This three-point clamping method provides balanced and sufficient clamping force for the two sets of movable clamping mechanisms.

[0035] Specifically, such as Figure 3As shown, the clamping cylinder located outside the second clearance opening 160 uses a combination of cylinder body 210 and L-shaped pressure rod 220. This structure can effectively overcome spatial obstacles and accurately apply clamping force to a designated area of ​​the lower die 110. Its compact design avoids interference with the processing area. The clamping cylinder located between the second clearance openings 160 uses a combination of cylinder body 210 and T-shaped pressure rod 230. One cylinder can simultaneously clamp the movable clamping mechanisms on both sides. This integrated design simplifies the air circuit and control system layout, improves clamping efficiency, and ensures balanced clamping force in the middle area. The turntable, as a driving component, drives the entire mounting plate 150 to achieve precise rotation, creating conditions for back-side processing.

[0036] The overall working process of this fixture is as follows: First, the operator accurately places the aluminum alloy tube to be processed in the contour groove 120 of the lower mold 110, ensuring that the workpiece is completely aligned with the positioning reference. Then, the upper mold 100 is aligned with the lower mold 110, and precise positioning is achieved through the cooperation of the first positioning pin 200 and the first positioning hole 190. Finally, the upper and lower molds 110 are locked with bolts 130, so that the workpiece is firmly clamped in the complete cavity. After the workpiece is clamped, the entire movable clamping mechanism is installed on the front of the mounting plate 150 through the cooperation of the second positioning pin 250 with the positioning hole on the mounting plate 150. The clamping cylinder is activated, and the movable clamping mechanism is stably clamped on the mounting plate 150 through the combined action of the L-shaped pressure rod 220 and the T-shaped pressure rod 230. Subsequently, the turntable drives the mounting plate 150 and all its components to rotate 180 degrees, so that the back of the mounting plate 150 faces upward. At this time, the area of ​​the workpiece to be processed is fully exposed through the first clearance opening 140 and the second clearance opening 160. During processing, the cutting tool enters through the second clearance opening 160 on the back of the mounting plate 150 and precisely processes the aluminum alloy tube through the first clearance opening 140 of the lower die 110. After processing, the turntable flips back to its original position, and the operator releases the clamping cylinder and bolt 130 in sequence to remove the processed workpiece.

[0037] In summary, this invention achieves unified datum for the workpiece during clamping and machining through the coordinated operation of the movable clamping mechanism and the fixed flipping mechanism, effectively avoiding cumulative errors caused by multiple clamping or datum conversions. The workpiece is stably constrained in the contour groove 120, and the flipping mechanism fully exposes the machining area, enhancing rigidity during machining and significantly improving dimensional accuracy and surface quality. This structure is particularly suitable for high-precision, batch-stable machining of thin-walled aluminum alloy tubular parts. The flipping machining method also makes operation more convenient and safer, providing a good foundation for integration into automated production lines. The modular design concept gives this fixture good versatility and adaptability, meeting different production needs and effectively improving production efficiency and product qualification rate.

[0038] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, 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.

[0039] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A fixture for machining aluminum alloy tubes, characterized in that, include: The movable clamping mechanism includes an upper die (100) and a lower die (110). A contour groove (120) for accommodating an aluminum alloy tube is provided between the upper die (100) and the lower die (110). The upper die (100) and the lower die (110) are locked together by bolts (130) to fix the aluminum alloy tube. The lower die (110) is provided with a first clearance opening (140) for the cutting tool to enter and process. The fixed flipping mechanism includes a mounting plate (150), a clamping cylinder for fixing the movable clamping mechanism on the mounting plate (150), and a turntable for driving the mounting plate (150) to rotate. The lower mold (110) is disposed on one side of the front of the mounting plate (150), and the back of the mounting plate (150) is provided with a second vent (160) leading to the first vent (140). During processing, the aluminum alloy tube is first placed in the contour groove (120), and the upper mold (100) and the lower mold (110) are locked with bolts (130) to fix the aluminum alloy tube. Then, the movable clamping mechanism is fixed on the mounting plate (150) by the clamping cylinder. Subsequently, the mounting plate (150) is flipped to face up by the turntable, so that the cutting tool passes through the second clearance opening (160) and the first clearance opening (140) in sequence to process the aluminum alloy tube.

2. The aluminum alloy tube processing fixture according to claim 1, characterized in that, The contour groove (120) includes an upper contour groove (170) disposed on the upper mold (100) and a lower contour groove (180) disposed on the lower mold (110).

3. The aluminum alloy tube processing fixture according to claim 1, characterized in that, Two contour grooves (120) are provided in parallel between the upper mold (100) and the lower mold (110).

4. The aluminum alloy tube processing fixture according to claim 1, characterized in that, The upper mold (100) and the lower mold (110) are provided with a first positioning hole (190) on one side and a corresponding first positioning pin (200) on the other side.

5. The aluminum alloy tube processing fixture according to claim 1, characterized in that, The width of the lower mold (110) is greater than the width of the upper mold (100), and the pressing cylinders are respectively arranged on both sides of the second vent (160) to press the top surfaces of both sides of the lower mold (110).

6. The aluminum alloy tube processing fixture according to claim 1, characterized in that, The movable clamping mechanism is provided in two sets, and the second clearance opening (160) is provided in two parallel positions on the mounting plate (150).

7. The aluminum alloy tube processing fixture according to claim 6, characterized in that, The clamping cylinder is provided in three parts, which are respectively located on the outside of the second air-blocking port (160) and between the two second air-blocking ports (160).

8. The aluminum alloy tube processing fixture according to claim 7, characterized in that, The clamping cylinder located outside the second vent (160) includes a cylinder body (210) and an L-shaped pressure rod (220). The cylinder body (210) drives the L-shaped pressure rod (220) to clamp the movable clamping mechanism on the adjacent side.

9. The aluminum alloy tube processing fixture according to claim 7, characterized in that, The clamping cylinder located between the second air vents (160) includes a cylinder body (210) and a T-shaped pressure rod (230). The cylinder body (210) drives the T-shaped pressure rod (230) to simultaneously clamp the movable clamping mechanisms on both sides.

10. The aluminum alloy tube processing fixture according to claim 1, characterized in that, The mounting plate (150) is provided with a second positioning pin (250), and the lower mold (110) is provided with a second positioning hole (240) corresponding to the second positioning pin (250).

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