Multi-surface clamping device for machining, for clamping multiple aircraft seat components

Abstract

Multi-surface clamping device for machining for clamping several aircraft seat components, comprising a support platform (1), a rotary and drive assembly (2) and at least one group of workpiece clamping units (3), characterized in that the rotary and drive assembly (2) comprises an opposing force output end (20) and a drive support end (21), wherein a support platform (1) is connected between the force output end (20) and the drive support end (21), wherein the force output end (20) can drive and rotate the support platform (1); wherein each group of workpiece clamping units (3) is arranged at intervals along the longitudinal direction of the support platform (1), wherein the workpiece clamping unit (3) consists of a first clamping assembly (30), a second clamping assembly (31) and a control connection device;wherein the first clamping assembly (30) serves for internal clamping of the workpiece, wherein the second clamping assembly (31) serves for clamping the outer profile of the workpiece, wherein the control connection device is connected to the control system, wherein the control connection device realizes the positioning and release of the workpiece by controlling the extension and retraction movement of the first clamping assembly (30) and the second clamping assembly (31).

Description

Technical field

[0001] The utility model relates to the technical field of clamping devices for machining, in particular to a multi-surface clamping device for machining for clamping several aircraft seat parts. Background technology

[0002] In the field of mechanical machining, multi-surface machining of several components has always been a crucial requirement for increasing production efficiency. As a key assembly in aerospace manufacturing, aircraft seat components are characterized by a complex structure, special materials, and high precision requirements. Multi-surface machining presents three main challenges: First, conventional clamping fixtures are difficult to adapt to the varying requirements of the seat components, resulting in long changeover times; second, thin-walled structures tend to deform due to uneven clamping forces, which impairs assembly accuracy; third, the multiple clamping and fixing sequences lead to cumulative positioning errors that are unlikely to meet aerospace-specific quality standards.

[0003] Conventional clamping devices for machining multiple components typically use manual clamping methods, which are not only cumbersome to operate and require significant personnel resources, but also make it difficult to precisely control the clamping force. This often leads to unstable clamping conditions, which means that the machining accuracy of the components cannot be reliably guaranteed. At the same time, conventional clamping devices can usually only machine a single angle or a few surfaces of a workpiece. To achieve multi-surface machining, the workpiece often needs to be clamped multiple times, which not only increases clamping errors and reduces machining accuracy, but also significantly impairs machining efficiency.

[0004] Chinese patent application CN222944982U discloses a four-axis machining device for left and right side beams. The device utilizes the interaction of several assemblies to position, clamp, and perform multi-surface machining of the workpieces on the left and right side beams. During the positioning phase, precise three-dimensional delimitation—on the sides, bottom, and end faces of the workpiece—is achieved through the interaction of positioning block and cylinder assemblies. The interaction of the first and second clamping cylinder assemblies applies a clamping force to the top and side faces of the workpiece, thus fixing it in position. Subsequently, the clamping device enables multi-surface machining by rotating the workpiece.The fixture typically only processes one workpiece group, resulting in low machining efficiency and limited adaptability. In particular, it cannot meet the requirements of flexible production of aircraft seat components in small batch sizes and with a high degree of product variety. Content of the utility model

[0005] To solve the aforementioned problems, a multi-surface clamping fixture for machining multiple aircraft seat components is presented. By installing multiple groups of workpiece clamping units, it is possible to machine several workpiece groups and different workpieces across multiple surfaces. This overcomes the limitations of conventional fixtures that can only machine one workpiece group, resulting in low machining efficiency and limited fixture adaptability.

[0006] To solve existing technical problems, this utility model application provides a multi-surface clamping device for machining for clamping several aircraft seat components, comprising a support platform, a rotary and drive assembly, and at least one group of workpiece clamping units, characterized in that the rotary and drive assembly comprises an opposing force output end and a driven support end, wherein a support platform is connected between the force output end and the driven support end, the force output end being able to drive the support platform to rotate about the axis; wherein each group of workpiece clamping units is arranged at intervals along the longitudinal direction of the support platform, the workpiece clamping unit consisting of a first clamping assembly, a second clamping assembly, and a control connection device;wherein the first clamping assembly serves for internal clamping of the workpiece, wherein the second clamping assembly serves for clamping the outer profile of the workpiece, wherein the control connection device is connected to the control system, wherein the control connection device realizes the positioning and release of the workpiece by controlling the extension and retraction movement of the first clamping assembly and the second clamping assembly.

[0007] According to one embodiment of this utility model, the first clamping assembly comprises a first hydraulic cylinder, a telescopic rod and a support rod, wherein the outlet end of the first hydraulic cylinder is connected to the telescopic rod, wherein an expanding end is arranged at the end of the telescopic rod, wherein the support rod is nested outside the telescopic rod, wherein support blocks are arranged at intervals at the upper end of the support rod, wherein the workpiece is nested onto the support rod, wherein the outer wall of the support block rests tightly against the inner wall of the workpiece when the telescopic rod moves downwards until the expanding end contacts the inner wall of the support block.

[0008] According to one embodiment of this utility model, the radial dimension of the magnifying end gradually increases in the direction away from the telescopic rod.

[0009] According to one embodiment of this utility model, the second clamping assembly comprises a second hydraulic cylinder, a floating assembly, a mounting block, and a feed block, wherein the outlet end of the second hydraulic cylinder is connected to the floating assembly, wherein the workpiece is arranged on the roof surface of the mounting block and one side of the workpiece rests against the mounting block, wherein the feed block is arranged between the floating assembly and the mounting block and is always in contact with the floating assembly, wherein the downward movement of the floating assembly causes the feed block to approach and contact the side of the workpiece that is away from the mounting block.

[0010] According to one embodiment of this utility model, the floating assembly comprises a float rod and a trapezoidal component, wherein the float rod is vertically connected to the output end of the second hydraulic cylinder, wherein the trapezoidal component is detachably attached to the float rod, wherein one side of the trapezoidal component is designed as a ramp surface, wherein the ramp surface is in contact with the feed block.

[0011] According to one embodiment of this utility model, the feed block is provided with a non-slip structure on the side facing the workpiece.

[0012] According to one embodiment of this utility model, the first clamping assembly further comprises a limiting pin, wherein one end of the workpiece can be nested at the limiting pin.

[0013] According to one embodiment of this utility model, the workpiece fastening unit is detachably connected to the support platform.

[0014] The advantages of this utility model novelty compared to the prior art are that: 1. The first clamping assembly is designed to internally clamp workpieces with an internal hole / cavity, while the second clamping assembly, designed for external clamping, adapts to various workpiece external profiles. The combination of both allows the clamping device to accommodate workpieces with the structural feature of internal clamping and external clamping. The rotary and drive assembly rotates the support platform, enabling the workpiece to be machined on multiple surfaces without multiple repositioning. The control connection device interacts with the external control system and automatically controls the extension and retraction of the clamping assembly via a program, thus eliminating the need for manual operation. Illustration of the attached drawings Fig. Figure 1 is a schematic structural representation I of the cross-sectional structure of a multi-surface clamping device for machining for clamping several aircraft seat parts in the present utility model. Fig. Figure 2 is a schematic structural representation II of the cross-sectional structure of a multi-surface clamping device for machining for clamping several aircraft seat parts in the present utility model. Fig. 3 is a partially enlarged view of Fig. 2. Fig. Figure 4 is a schematic sectional view I of the cross-sectional structure of a multi-surface clamping device for machining for clamping several aircraft seat parts in the present utility model. Fig. 5 is a partially enlarged view of Fig. 4. Fig. Figure 6 is a schematic sectional view II of the cross-sectional structure of a multi-surface clamping device for machining for clamping several aircraft seat parts in the present utility model. Fig. Image 7 is a partially enlarged view of Fig. 6.

[0015] Labels in the figures: 1. Support platform; 2. Rotary and drive assembly; 20. Power output end; 21. Output support end; 3. Workpiece clamping unit; 30. First clamping assembly; 300. First hydraulic cylinder; 301. Telescopic rod; 3010. Extension end; 302. Support rod; 303. Limiting pin; 31. Second clamping assembly; 310. Second hydraulic cylinder; 311. Floating assembly; 3110. Floating rod; 3111. Trapezoidal component; 312. Mounting block; 313. Feed block. Specific embodiments

[0016] In order to better understand the features, technical means, and the specific goals and functions achieved by this utility model, a more detailed description of this utility model is given below in conjunction with the attached figures and specific embodiments.

[0017] As in Fig. 1 to Fig. 7. The present utility model provides a multi-surface clamping device for machining for clamping several aircraft seat parts, comprising a support platform 1, a rotary and drive assembly 2, and at least one group of workpiece clamping units 3, characterized in that the rotary and drive assembly 2 comprises an opposing force output end 20 and a drive support end 21, wherein a support platform 1 is connected between the force output end 20 and the drive support end 21, the force output end 20 being able to drive the support platform 1 to rotate about the axis; wherein each group of workpiece clamping units 3 is arranged at intervals along the longitudinal direction of the support platform 1, the workpiece clamping unit 3 comprising a first clamping assembly 30, a second clamping assembly 31, and a control connection device;wherein the first clamping assembly 30 serves for internal clamping of the workpiece, wherein the second clamping assembly 31 serves for clamping the outer profile of the workpiece, wherein the control connection device is connected to the control system, wherein the control connection device realizes the positioning and release of the workpiece by controlling the extension and retraction movement of the first clamping assembly 30 and the second clamping assembly 31.

[0018] Each workpiece clamping unit 3 is arranged at intervals along the longitudinal direction of the support platform 1. Depending on requirements, several groups can be arranged simultaneously to clamp multiple workpieces and increase machining efficiency. The first clamping assembly 30 (internal clamping): It clamps the workpiece from the inside (e.g., inner hole, inner cavity) by expanding inwards and thus bearing against the inner wall to exert a stable internal support force and prevent deformation or displacement of the workpiece internally. The second clamping assembly 31 (external profile clamping): It exerts a clamping force from the outer profile of the workpiece (e.g., cylindrical surface, plane, etc.) and, together with the first clamping assembly 30, forms an "internal and external clamping" to fix the workpiece from different directions.The first clamping assembly 30 is suitable for internally clamping workpieces with an inner hole / cavity, while the second clamping assembly 31 adapts to various external profiles of workpieces for clamping from the outside. The combination of both enables the clamping device to accommodate workpieces with the structural feature of internal clamping + external clamping. The workpiece fastening unit 3 is arranged at intervals along the longitudinal direction of the support platform 1 and supports the arrangement of at least one group, allowing multiple groups of units to be installed simultaneously for clamping several workpieces. Compared to the conventional clamping device model, which processes only a few workpieces per pass, this design enables the production of a larger number of components within the same machining cycle and is particularly suitable for series production, thus significantly increasing production efficiency.The rotary and drive assembly 2 drives the carrier platform 1 for rotation, enabling the workpiece to be machined on multiple surfaces without multiple reclamping operations. The control connection device works in conjunction with the external control system and automatically controls the extension and retraction of the clamping assembly via a program, thus eliminating manual operation by personnel. This not only reduces manual workload but also ensures the consistency and precision of each clamping movement, reduces human error, and facilitates integration into automated production lines.

[0019] The first clamping assembly 30 comprises a first hydraulic cylinder 300, a telescopic rod 301 and a support rod 302, wherein the output end of the first hydraulic cylinder 300 is connected to the telescopic rod 301, wherein an extension end 3010 is arranged at the end of the telescopic rod 301, wherein the support rod 302 is nested outside the telescopic rod 301, wherein support blocks are arranged at intervals at the upper end of the support rod 302, wherein the workpiece is nested onto the support rod 302, wherein the outer wall of the support block rests tightly against the inner wall of the workpiece when the telescopic rod 301 moves downwards until the extension end 3010 contacts the inner wall of the support block.

[0020] During clamping, the first hydraulic cylinder 300 drives the telescopic rod 301 downwards, which in turn moves the expanding end 3010 downwards. Due to its radially increasing dimensions, it presses against the inner wall of the support block, forcing the support block to expand radially outwards. As soon as the expanding end 3010 fully contacts the inner wall of the support block, the outer wall of the support block fits snugly against the inner wall of the workpiece, thus ensuring internal support and fixation of the workpiece.

[0021] Upon release, the first hydraulic cylinder 300 drives the telescopic rod 301 upwards, thereby reducing or eliminating the pressure exerted by the extension end 3010 on the support block. The support block returns to its initial position by means of its own elasticity or a return mechanism, thus releasing the clamping force on the workpiece. As in Fig.5 The radial dimension of the magnifying end 3010 gradually increases in the direction away from the telescopic rod 301.

[0022] The second clamping assembly 31 comprises a second hydraulic cylinder 310, a floating assembly 311, a mounting block 312 and a feed block 313, wherein the outlet end of the second hydraulic cylinder 310 is connected to the floating assembly 311, wherein the workpiece is arranged on the roof surface of the mounting block 312 and one side of the workpiece rests against the mounting block 312, wherein the feed block 313 is arranged between the floating assembly 311 and the mounting block 312 and is always in contact with the floating assembly 311, wherein the downward movement of the floating assembly 311 causes the feed block 313 to approach and contact the side of the workpiece that is away from the mounting block 312.

[0023] Initial state: The workpiece lies on the top of the mounting block 312, one side naturally rests against the side surface of the mounting block 312, thus providing a preliminary lateral positioning; the feed block 313 is in a position away from the workpiece and exerts no clamping force.

[0024] Clamping process: The second hydraulic cylinder 310 drives the floating assembly 311 downwards. Since the feed block 313 is always in contact with the floating assembly 311 (as if resting against its inclined surface), when the floating assembly 311 is lowered, the inclined surface compresses the feed block 313, forcing the feed block 313 to move horizontally towards the mounting block 312. When the feed block 313 touches the side of the workpiece furthest from the mounting block 312 and continues to exert force, the workpiece is firmly clamped between the mounting block 312 and the feed block 313, thus completing the lateral clamping process.

[0025] Release process: The second hydraulic cylinder 310 drives the floating assembly 311 upwards, thereby reducing or eliminating the pressure exerted by the floating assembly 311 on the feed block 313. The feed block 313 returns to its initial position under its own weight or by means of a return mechanism (e.g., a spring), thus releasing the workpiece from clamping.

[0026] The floating assembly 311 comprises the float rod 3110 and the trapezoidal component 3111. The float rod 3110 is vertically attached to the outlet end of the second hydraulic cylinder 310. The trapezoidal component 3111 is detachably attached to the float rod 3110. One side of the trapezoidal component 3111 is designed as a ramp surface that contacts the feed block 313.

[0027] A non-slip structure is provided on the side of the feed block 313 facing the workpiece. To prevent slippage during contact between the feed block 313 and the workpiece, the non-slip structure is preferably designed as several raised sections.

[0028] The first clamping assembly 30 also includes a limiting pin 303, onto which one end of the workpiece can be placed. To prevent rotation of the workpiece during machining, especially if the inner wall of the workpiece has a smooth, round structure, the limiting pin 303 can additionally fix the workpiece, thus reducing workpiece wobble during the machining process.

[0029] The workpiece clamping unit 3 is detachably connected to the support platform 1. The adaptability of the device is further increased to facilitate subsequent maintenance.

[0030] The above examples express only one or some embodiments of the utility model, which are described in more specific and detailed terms, but are not to be understood as limiting the scope of the utility model. It should be noted that a person skilled in the art can make a number of modifications and improvements without departing from the concept of the utility model, all of which fall within the scope of protection of the utility model. Therefore, the scope of protection of this utility model is defined by the accompanying claims. QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 222944982U

[0004]

Claims

[1] Multi-surface clamping device for machining for clamping several aircraft seat parts, comprising a support platform (1), a rotary and drive assembly (2) and at least one group of workpiece clamping units (3), characterized by, that the rotary and drive assembly (2) comprises an opposing force output end (20) and a driven support end (21), wherein a support platform (1) is connected between the force output end (20) and the driven support end (21), the force output end (20) being able to drive and rotate the support platform (1); wherein each group of workpiece clamping units (3) is arranged at intervals along the longitudinal direction of the support platform (1), the workpiece clamping unit (3) comprising a first clamping assembly (30), a second clamping assembly (31) and a control connection device;wherein the first clamping assembly (30) serves for internal clamping of the workpiece, wherein the second clamping assembly (31) serves for clamping the outer profile of the workpiece, wherein the control connection device is connected to the control system, wherein the control connection device realizes the positioning and release of the workpiece by controlling the extension and retraction movement of the first clamping assembly (30) and the second clamping assembly (31). [2] Multi-surface clamping device for machining for clamping several aircraft seat parts according to claim 1, characterized by, that the first clamping assembly (30) comprises a first hydraulic cylinder (300), a telescopic rod (301) and a support rod (302), wherein the outlet end of the first hydraulic cylinder (300) is connected to the telescopic rod (301), wherein an extension end (3010) is arranged at the end of the telescopic rod (301), wherein the support rod (302) is nested outside the telescopic rod (301), wherein support blocks are arranged at intervals at the upper end of the support rod (302), wherein the workpiece is nested onto the support rod (302), wherein the outer wall of the support block rests tightly against the inner wall of the workpiece when the telescopic rod (301) moves downwards until the extension end (3010) contacts the inner wall of the support block. [3] Multi-surface clamping device for machining for clamping several aircraft seat parts according to claim 2, characterized by, that the radial dimension of the magnification end (3010) gradually increases in the direction away from the telescopic rod (301). [4] Multi-surface clamping device for machining for clamping several aircraft seat parts according to claim 1, characterized by, that the second clamping assembly (31) comprises a second hydraulic cylinder (310), a floating assembly (311), a mounting block (312) and a feed block (313), wherein the outlet end of the second hydraulic cylinder (310) is connected to the floating assembly (311), wherein the workpiece is arranged on the roof surface of the mounting block (312) and one side of the workpiece rests against the mounting block (312), wherein the feed block (313) is arranged between the floating assembly (311) and the mounting block (312) and is always in contact with the floating assembly (311), wherein the downward movement of the floating assembly (311) causes the feed block (313) to approach and contact the side of the workpiece that is away from the mounting block (312). [5] Multi-surface clamping device for machining for clamping several aircraft seat parts according to claim 4, characterized by, that the floating assembly (311) comprises a float rod (3110) and a trapezoidal component (3111), wherein the float rod (3110) is vertically connected to the outlet end of the second hydraulic cylinder (310), wherein the trapezoidal component (3111) is detachably attached to the float rod (3110), wherein one side of the trapezoidal component (3111) is designed as a ramp surface, wherein the ramp surface is in contact with the feed block (313). [6] Multi-surface clamping device for machining for clamping several aircraft seat parts according to claim 5, characterized by , that the feed block (313) is provided with a non-slip structure on the side facing the workpiece. [7] Multi-surface clamping device for machining for clamping several aircraft seat parts according to claim 2, characterized by, that the first clamping assembly (30) further comprises a limiting pin (303), wherein one end of the workpiece can be nested at the limiting pin (303). [8] Multi-surface clamping device for machining for clamping several aircraft seat parts according to claim 1, characterized by , that the workpiece fastening unit (3) is detachably connected to the support platform (1).

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