Five-axis hydraulic clamp for processing automobile long shell

Abstract

The utility model relates to the technical field of automobile long casing clamping, specifically relates to a five -axis hydraulic clamp for automobile long casing processing, including rotating chassis, the top fixed connection of rotating chassis has the positioning base plate, the top fixed connection of positioning base plate has five auxiliary support rods, and the top between five auxiliary support rods places has long casing spare, and the top of positioning base plate is provided with the clamping mechanism for the clamping of long casing spare of complex structure, and the clamping mechanism includes hydraulic cylinder, and the top of hydraulic cylinder is fixedly connected on positioning base plate, and the number of hydraulic cylinder is provided with five, and the top of hydraulic cylinder is provided with output rod, and the top rotation is connected with clamping block of output rod. Compared with the prior art, the overall structure of the application can realize the high-precision clamping of the long casing workpiece of the structure slender, shape complex, multiple points, can clamp multiple points, and the clamping force distribution of complex workpiece is uniform, and the machining precision and consistency are significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of automobile long shell clamping technology, and in particular to a five-axis hydraulic clamp for processing automobile long shells. Background Technology

[0002] With the continuous development of automotive manufacturing technology, an increasing number of long shell-type structural parts are being widely used in automotive chassis, transmission systems, and electric drive systems, such as drive axle housings, transmission housings, and motor assembly housings. These workpieces are characterized by their slender structure, complex shape, insufficient rigidity, and numerous machined surfaces, typically requiring high-precision multi-faceted and multi-angle machining on a five-axis machining center. To ensure machining accuracy and efficiency, highly stable specialized fixtures must be used to reliably position and hold the workpieces during the machining process.

[0003] A Chinese patent has been published: a jig for machining holes in an automotive steering gear housing, patent announcement number: CN209110591U. This patent "includes a support plate, a machining table, and a clamping plate. An electromagnetic slide rail is embedded in the left end of the upper surface of the support plate. A cantilever plate is fixed to the upper end of the frame. A motor box is connected to the lower end of the first electric telescopic rod. The machining table is located below the drill bit. A slider is installed inside the slide groove. The clamping plate is located on the upper surface of the machining table. A frustum is installed below the machining table. A spring is installed on the outer side of the movable rod."

[0004] Although the equipment clamps steering gear housings of different lengths using a machining table and clamping plates, the clamping structure only provides support and clamping devices at both ends of the workpiece. While this structure provides some clamping effect in simple machining, it is clearly insufficient when machining complex long shell workpieces. These workpieces are generally characterized by slender structures, complex shapes, and multiple machining surfaces. When machining on multiple surfaces, angles, and directions on a machining center, higher requirements are placed on the positioning and clamping stability of the fixture. However, this fixture structure cannot achieve high-precision clamping of multiple surfaces of the workpiece. Especially during high-load machining processes such as drilling and milling, insufficient clamping surfaces or uneven distribution of clamping force lead to unstable stress on the workpiece, which can easily cause micro-displacement or deformation, thus affecting the machining accuracy and the consistency of the finished product. Utility Model Content

[0005] In view of this, the purpose of this utility model is to propose a five-axis hydraulic fixture for machining long car bodies, so as to solve the problem that when the existing workpieces are long and slender, have complex shapes and many machining surfaces, micro-displacement or deformation is easily generated when machining on multiple surfaces, angles and directions on the machining center due to insufficient clamping surfaces or uneven distribution of clamping force.

[0006] To achieve the above objectives, this utility model provides a five-axis hydraulic fixture for machining long automotive shells, including a rotating chassis. A positioning base plate is fixedly connected to the top of the rotating chassis, and five auxiliary support rods are fixedly connected to the top of the positioning base plate. A long shell component is placed between the tops of the five auxiliary support rods, and a clamping mechanism for clamping the long shell component with a complex structure is provided on the top of the positioning base plate.

[0007] Preferably, the clamping mechanism includes hydraulic cylinders, which are fixedly connected to the top of the positioning base plate. Five hydraulic cylinders are provided. An output rod is provided on the top of the hydraulic cylinder. A clamping block is rotatably connected to the top of the output rod. The end of the clamping block away from the hydraulic cylinder is directly above the top of the auxiliary support rod. The clamping block is used to press the long housing part against the top of the auxiliary support rod. Connecting plates are rotatably connected to the bottom two sides of the clamping block. A connecting block is fixedly installed on the top of the hydraulic cylinder. The bottom ends of the two connecting plates are rotatably connected to the two sides of the connecting block, respectively.

[0008] Preferably, the top of the positioning base plate is fixedly connected to the bottom of the long shell component, and a fixed shaft is rotatably connected between the inner walls of the supporting base plate. Auxiliary clamps are rotatably connected to both sides of the outer wall of the fixed shaft. The two auxiliary clamps are arranged opposite to each other and are V-shaped. An electric telescopic rod is rotatably connected between the opposite ends of the two auxiliary clamps. An anti-slip block is fixedly connected to the top of the auxiliary clamps, and the inner wall of the anti-slip block is provided with an inner groove and an arc-shaped groove.

[0009] Preferably, the inner wall of the arc-shaped groove is fixedly connected with a rubber pad for contacting the middle outer wall of the long housing component.

[0010] Preferably, the top of the positioning base plate is fixedly connected with three positioning pins, which are distributed in an L-shape and fit against the outer wall of the long housing component.

[0011] Preferably, the clamping block has a Z-shaped structure. When the hydraulic cylinder pushes up one end of the clamping block through the output rod, the clamping block will rotate about the connection point between its middle part and the connecting plate as the rotation axis. The other end of the clamping block will rotate downward and clamp the outer wall of the long shell part on the top of the auxiliary support rod.

[0012] Preferably, when the electric telescopic rod extends, it will cause the auxiliary clamps on both sides of the fixed shaft to rotate around the connection point between the middle part and the fixed shaft as the rotation axis, and the top of the two auxiliary clamps will cause the anti-slip block to clamp the middle part of the long shell component.

[0013] The beneficial effects of this utility model are:

[0014] This five-axis hydraulic clamping fixture for machining long automotive body shells combines multi-point hydraulic clamping with a central auxiliary clamping structure to form a highly stable and precise clamping method. Hydraulic cylinders drive Z-shaped clamping blocks to apply multi-directional pressure, effectively and stably clamping the outer wall of the long body shell, avoiding uneven force distribution caused by unidirectional clamping. An electric telescopic rod drives a V-shaped auxiliary clamping plate in the center of the fixture to clamp the workpiece, enhancing overall clamping rigidity and preventing central swaying or deformation during machining. The overall structure enables high-precision clamping of long, slender, and complex-shaped body shell workpieces from multiple points and angles. It can clamp multiple points, ensuring uniform clamping force distribution for complex workpieces. This effectively solves problems such as unstable clamping, deformation, inaccurate positioning, and uneven clamping force distribution in complex machining using traditional clamping fixtures, significantly improving machining accuracy and consistency. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in 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 for this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of the positioning substrate of this utility model;

[0018] Figure 3 This is a three-dimensional structural diagram of the positioning of this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the hydraulic cylinder and clamping block of this utility model;

[0020] Figure 5 This is a three-dimensional structural diagram of the auxiliary clamp and anti-movement block of this utility model.

[0021] The diagram is marked as follows:

[0022] 1. Rotating chassis; 2. Positioning base plate; 3. Auxiliary support rod; 4. Long housing component; 5. Positioning pin; 6. Hydraulic cylinder; 7. Output rod; 8. Clamping block; 9. Connecting plate; 10. Support base plate; 11. Fixed shaft; 12. Auxiliary clamping plate; 13. Electric telescopic rod; 14. Anti-slip block; 15. Inner groove; 16. Arc groove; 17. Rubber pad; 18. Connecting block. Detailed Implementation

[0023] 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.

[0024] It should be noted that, unless otherwise defined, the technical or scientific terms used in this utility model should have the ordinary meaning understood by one of ordinary skill in the art to which this utility model pertains. The terms "first," "second," and similar terms used in this utility model do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0025] like Figures 1 to 5 As shown, a five-axis hydraulic fixture for machining long car bodies includes a rotating chassis 1, a positioning base plate 2 fixedly connected to the top of the rotating chassis 1, five auxiliary support rods 3 fixedly connected to the top of the positioning base plate 2, a long car body part 4 placed between the tops of the five auxiliary support rods 3, and a clamping mechanism for clamping the long car body part 4 with a complex structure provided on the top of the positioning base plate 2.

[0026] Further, see attached document. Figures 3 to 5 As shown, the clamping mechanism includes hydraulic cylinders 6, which are fixedly connected to the top of the positioning base plate 2. Five hydraulic cylinders 6 are provided. An output rod 7 is located on the top of each hydraulic cylinder 6. A clamping block 8 is rotatably connected to the top of the output rod 7. The end of the clamping block 8 furthest from the hydraulic cylinder 6 is directly above the top of the auxiliary support rod 3. The clamping block 8 is used to press the long housing part 4 against the top of the auxiliary support rod 3. Connecting plates 9 are rotatably connected to both sides of the bottom of the clamping block 8. A connecting block 18 is fixedly installed on the top of the hydraulic cylinder 6. The bottom ends of the two connecting plates 9 are rotatably connected to... On both sides of the connecting block 18, the top of the positioning base plate 2 is fixedly connected to the bottom of the long shell part 4 with a support base plate 10. The inner walls of the support base plate 10 are rotatably connected with a fixed shaft 11. The outer walls of the fixed shaft 11 are rotatably connected with auxiliary clamping plates 12. The two auxiliary clamping plates 12 are arranged opposite to each other. The auxiliary clamping plates 12 are V-shaped. The opposite ends of the two auxiliary clamping plates 12 are rotatably connected with an electric telescopic rod 13. The top of the auxiliary clamping plate 12 is fixedly connected with an anti-slip block 14. The inner wall of the anti-slip block 14 is provided with an inner groove 15 and an arc groove 16.

[0027] During the clamping operation, the long housing component 4 is first placed on five auxiliary support rods 3. Five hydraulic cylinders 6 are fixed on the positioning base plate 2. Three of the five hydraulic cylinders 6 are distributed on one side of the long housing component 4, and the other two are distributed on the other side. Their output rods 7 drive one end of the Z-shaped clamping block 8 to rise. The clamping block 8 rotates around the connection point between its middle part and the connecting plate 9, causing the other end to press downward. This clamps the outer wall of the long housing component 4 located on the auxiliary support rods 3 from multiple directions, achieving top-pressure directional clamping. At the same time, the top of the positioning base plate 2 is also provided with three L-shaped positioning pins 5, which fit against the outer wall of the long housing component 4 to prevent lateral displacement. To further enhance the clamping stability, a support base plate 10 is provided in the middle of the clamp, and it is rotatably connected between its inner walls. The fixed shaft 11 has V-shaped auxiliary clamping plates 12 rotatably connected at both ends. When the electric telescopic rod 13 extends, it drives the auxiliary clamping plates 12 at both ends to rotate, causing the two auxiliary clamping plates 12 to close the anti-slip block 14. The anti-slip block 14, which is fixedly connected at the top, clamps the middle outer wall of the long shell part 4. The inner groove 15 and the arc groove 16 are provided to be opened according to the shape of the workpiece, thereby enhancing the fit. The inner wall of the arc groove 16 is bonded with a rubber pad 17 to provide buffering and anti-slip function. This structure realizes the combination of multi-directional hydraulic clamping, middle auxiliary clamping plate 12 and three-point positioning clamping method, which can clamp the workpiece on multiple sides and at multiple points at the same time, significantly improving the uniformity and stability of force during processing. It solves the problems of workpiece displacement, deformation and decreased accuracy caused by unstable clamping in the processing of complex long shells by traditional fixtures.

[0028] Further, see attached document. Figure 5 As shown, a rubber pad 17 is fixedly connected to the inner wall of the arc groove 16 for contacting the middle outer wall of the long housing 4. The rubber pad 17 is fixedly connected to the inner wall of the arc groove 16 so that it can fully fit with the middle outer wall of the long housing 4, and play a role in buffering and anti-slip.

[0029] Further, see attached document. Figure 3 As shown, three positioning pins 5 are fixedly connected to the top of the positioning base plate 2. The three positioning pins 5 are distributed in an L-shape and are in contact with the outer wall of the long shell part 4.

[0030] It can accurately position the workpiece, so that the workpiece has a stable positioning reference when it is initially placed, which can effectively prevent the workpiece from sliding or rotating laterally before processing and improve the overall clamping accuracy.

[0031] Further, see attached document. Figure 4 As shown, the clamping block 8 has a Z-shaped structure. When the hydraulic cylinder 6 pushes up one end of the clamping block 8 through the output rod 7, the clamping block 8 will rotate about the connection point between its middle part and the connecting plate 9 as the rotation axis. The other end of the clamping block 8 will rotate downward and clamp the outer wall of the long shell part 4 on the top of the auxiliary support rod 3.

[0032] The clamping block 8 adopts a Z-shaped structure design. When driven by the output rod 7 of the hydraulic cylinder 6, one end of it is lifted and rotates around the central connecting plate 9 as the rotation axis, thereby driving the other end to clamp the outer wall of the long housing part 4 downward. This mechanism achieves the effect of lever-type amplification of clamping force without adding an additional power device, making the clamping action more powerful and precise, effectively improving the clamping stability of the workpiece at the support end, and preventing loosening or displacement during processing.

[0033] Further, see attached document. Figure 5 As shown, when the electric telescopic rod 13 extends, it will drive the auxiliary clamping plates 12 on both sides of the fixed shaft 11 to rotate around the connection point between the middle part and the fixed shaft 11 as the rotation axis. The top of the two auxiliary clamping plates 12 will drive the anti-slip block 14 to clamp the middle part of the long shell part 4.

[0034] The telescopic movement of the electric telescopic rod 13 drives the V-shaped auxiliary clamping plates 12 at both ends of the fixed shaft 11 to rotate, so that the anti-slip block 14 fixed at the top of the clamping plate can clamp the middle of the long shell part 4. This structure forms a clamping constraint on the middle of the workpiece, and can achieve middle clamping support on the basis of hydraulic clamping at both ends, which significantly improves the stability and rigidity of the overall workpiece clamping, and is particularly suitable for the accuracy of multi-face synchronous clamping.

[0035] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0036] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A five-axis hydraulic fixture for machining long car bodies, comprising a rotating chassis (1), wherein a positioning base plate (2) is fixedly connected to the top of the rotating chassis (1), characterized in that: Five auxiliary support rods (3) are fixedly connected to the top of the positioning base plate (2). A long shell component (4) is placed between the tops of the five auxiliary support rods (3). A clamping mechanism for clamping the long shell component (4) with a complex structure is provided on the top of the positioning base plate (2). The clamping mechanism includes a hydraulic cylinder (6). The hydraulic cylinder (6) is fixedly connected to the top of the positioning base plate (2). There are five hydraulic cylinders (6). An output rod (7) is provided on the top of the hydraulic cylinder (6). A clamping block (8) is rotatably connected to the top of the output rod (7). The end of the clamping block (8) away from the hydraulic cylinder (6) is directly above the top of the auxiliary support rod (3). The clamping block (8) is used to press the long shell part (4) against the top of the auxiliary support rod (3). The bottom sides of the clamping block (8) are rotatably connected to the connecting plates (9). The top of the hydraulic cylinder (6) is fixedly installed with the connecting block (18). The bottom ends of the two connecting plates (9) are rotatably connected to the two sides of the connecting block (18). The clamping block (8) is Z-shaped. When the hydraulic cylinder (6) pushes up one end of the clamping block (8) through the output rod (7), the clamping block (8) will rotate about the connection point between its middle part and the connecting plate (9) as the rotation axis. The other end of the clamping block (8) will rotate downward and clamp the outer wall of the long shell part (4) on the top of the auxiliary support rod (3).

2. A five-axis hydraulic fixture for machining long automotive bodies according to claim 1, characterized in that, The top of the positioning base plate (2) is fixedly connected to the bottom of the long shell part (4) with a support base plate (10). A fixed shaft (11) is rotatably connected between the inner walls of the support base plate (10). Auxiliary clamps (12) are rotatably connected to both sides of the outer wall of the fixed shaft (11). The two auxiliary clamps (12) are arranged opposite to each other. The auxiliary clamps (12) are V-shaped. An electric telescopic rod (13) is rotatably connected between the opposite ends of the two auxiliary clamps (12). An anti-slip block (14) is fixedly connected to the top of the auxiliary clamps (12). An inner groove (15) and an arc groove (16) are opened on the inner wall of the anti-slip block (14).

3. A five-axis hydraulic fixture for machining long automotive bodies according to claim 2, characterized in that, The inner wall of the arc groove (16) is fixedly connected with a rubber pad (17) for contacting the middle outer wall of the long shell part (4).

4. A five-axis hydraulic fixture for machining long automotive bodies according to claim 1, characterized in that, The top of the positioning base plate (2) is fixedly connected with three positioning pins (5), which are distributed in an L-shape and fit against the outer wall of the long shell part (4).

5. A five-axis hydraulic fixture for machining long automotive bodies according to claim 2, characterized in that, When the electric telescopic rod (13) extends, it will drive the auxiliary clamps (12) on both sides of the fixed shaft (11) to rotate around the connection point between the middle part and the fixed shaft (11). The top of the two auxiliary clamps (12) will drive the anti-slip block (14) to clamp the middle part of the long shell part (4).

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