Workpiece deformation correction tooling for a multi-axis machining center

Abstract

The utility model discloses a workpiece deformation correction frock of multi -shaft linkage machining center relates to automobile production workpiece processing technical field, include: multi -shaft linkage machining box, the positioner is located in multi -shaft linkage machining box, and the positioner includes control part and pressing box, and control part is located in multi -shaft linkage machining box, and pressing box is equipped with two, two pressing boxes all are located on control part. The workpiece deformation correction frock of multi -shaft linkage machining center, through the use of equidistance positioner, can provide even adjustable pressure distribution, avoid local stress, by distance cylinder, slider, connecting rod group, control multiple pressing rod synchronous equidistance movement, according to the size and structural characteristics of different workpieces, flexibly adjust the position of multiple pressure points, enough even, symmetrical distribution of pressure to the key support part of workpiece, avoid because of the improper distribution of pressure point or uneven stress leads to workpiece local distortion and clamping deformation.

Description

Technical Field

[0001] This utility model relates to the field of automotive manufacturing workpiece processing technology, specifically a workpiece deformation correction fixture for a multi-axis linkage machining center. Background Technology

[0002] In the automotive manufacturing industry, high-precision complex parts are widely processed by multi-axis machining centers for precision machining such as milling, drilling, and tapping. These parts are usually complex in structure, thin in wall, and mostly cast from lightweight materials such as aluminum alloys. Internal residual stress will be generated during casting, heat treatment, and previous machining processes.

[0003] On machining centers, traditional tooling fixtures position and fix workpieces by rigid clamping. However, under the combined action of cutting force, clamping force, and residual stress release, the workpiece is prone to elastic or elastoplastic deformation. This deformation leads to two serious consequences: First, during machining, the workpiece is in a non-ideal geometric shape, causing critical accuracy deviations such as the position and perpendicularity of machining features to exceed tolerances. Second, and more insidiously, after machining is completed and the fixture is released, the workpiece will spring back due to stress rebalancing, causing the final product dimensions to deviate from the design target, resulting in batch quality accidents and high scrap rates.

[0004] To address this issue, existing technologies typically employ passive methods such as adding auxiliary supports or optimizing the layout of pressure points. However, these methods have significant limitations: First, the position of the pressure bar in most tooling is fixed or has a limited adjustment range, making it difficult to quickly adapt to workpieces of different sizes and resulting in low flexibility. Second, traditional rigid pressure heads lack self-adaptive capabilities. When the workpiece undergoes slight deformation due to stress release during processing, the pressure head cannot float accordingly and may instead interfere with the workpiece, either exacerbating workpiece deformation, causing pressure marks on the workpiece surface, or even leading to clamping failure. Utility Model Content

[0005] This utility model provides a workpiece deformation correction fixture for a multi-axis linkage machining center. Through the use of an equidistant adjustment mechanism, it can provide a uniform and adjustable clamping force distribution, avoiding localized stress. Multiple pressing rods move synchronously at equal intervals, controlled by an adjusting cylinder, slider, and connecting rod assembly. The positions of multiple clamping points can be flexibly adjusted according to the size and structural characteristics of different workpieces, enabling the clamping force to be evenly and symmetrically distributed to the key support parts of the workpiece. This avoids localized twisting and clamping deformation of the workpiece caused by improper distribution of clamping points or uneven force. Through the use of the correction mechanism, it is possible to… To achieve adaptive flexible clamping and effectively suppress machining deformation, a correction mechanism consisting of a mounting block, a straightening and adjusting seat, a floating positioning block, and multiple straightening rods is used. The contact part between the device and the workpiece is flexibly connected. When the workpiece undergoes slight contraction or deformation due to cutting force or internal stress release during machining, the floating positioning block can make slight adaptive adjustments under the action of the hinge structure formed by the straightening rods, allowing the clamping point to float accordingly. This avoids secondary stress concentration or local over-clamping caused by forcibly constraining the deformation of the workpiece, effectively suppressing the overall machining deformation of the workpiece and ensuring machining accuracy.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a workpiece deformation correction fixture for a multi-axis linkage machining center, comprising:

[0007] Multi-axis linkage machining box;

[0008] The adjustment mechanism is located inside the multi-axis linkage machining box. The adjustment mechanism includes a control component and a pressing box. The control component is located inside the multi-axis linkage machining box, and there are two pressing boxes, both of which are located on the control component.

[0009] The equidistant adjustment mechanism comprises two sets, each set housed within a pressing box. Each equidistant adjustment mechanism includes an adjustment component and pressing rods. The adjustment component is located within the pressing box, and multiple pressing rods are movably connected within the pressing box and connected to the adjustment component.

[0010] The correction mechanism comprises multiple sets, each set being located at the bottom of each pressing rod. Each set of correction mechanisms includes a mounting block, a floating positioning block, a correction rod, and a correction adjustment seat. The mounting block is fixedly connected to the bottom of the pressing rod, the correction adjustment seat is movably connected within the mounting block, the floating positioning block is fixedly connected to the bottom of the correction adjustment seat, and multiple correction rods are provided. One end of each correction rod is rotatably connected to the top four corners of the mounting block, and the other end of each correction rod is rotatably connected to the top four corners of the correction adjustment seat.

[0011] Furthermore, the control components include a suspension assembly, an adjustment motor, and a bidirectional screw. Suspension rods are fixedly connected to both sides of the top of the multi-axis linkage machining box. The two pressing boxes are slidably connected to the two suspension rods. The bidirectional screw is rotatably connected to the top of the multi-axis linkage machining box, and its two ends are threadedly connected to the two pressing boxes respectively. The adjustment motor is fixedly connected to the top center of one side of the outer surface of the multi-axis linkage machining box, and its output end is fixedly connected to one end of the bidirectional screw.

[0012] Furthermore, the adjustment component includes:

[0013] A drive assembly is located on the press box and is connected to one of the press levers;

[0014] Linkage components are located on multiple pressing levers; and

[0015] A guide assembly is located inside the pressing box and is connected to multiple pressing rods.

[0016] Furthermore, the drive assembly includes an adjustable cylinder, a slide groove, and a slider. The adjustable cylinder is fixedly connected inside the pressing box. The slide groove is opened on one side of the outer surface of the pressing box. The slider is slidably connected inside the slide groove. The slider is fixedly connected to one end of the adjustable cylinder and is also fixedly connected to one of the pressing rods.

[0017] Furthermore, the linkage component includes a linkage group and a connecting groove. There are multiple connecting grooves, each of which is opened on each pressing rod. The linkage group is disposed in the multiple connecting grooves and is connected to the multiple connecting grooves.

[0018] Furthermore, the guiding assembly includes two guide rods, both of which are fixedly connected to the pressing box, and multiple pressing rods are slidably connected to the two guide rods.

[0019] This invention provides a workpiece deformation correction fixture for a multi-axis linkage machining center. It has the following beneficial effects:

[0020] (1) The workpiece deformation correction fixture of the multi-axis linkage machining center can provide a uniform and adjustable clamping force distribution through the use of the equidistant adjustment mechanism, avoiding local stress. The adjustment cylinder, slider and connecting rod group control multiple pressing rods to move synchronously at equal intervals. According to the size and structural characteristics of different workpieces, the position of multiple clamping points can be flexibly adjusted so that the clamping force can be evenly and symmetrically distributed to the key support parts of the workpiece, avoiding local twisting and clamping deformation of the workpiece caused by improper distribution of clamping points or uneven force.

[0021] (2) The workpiece deformation correction fixture of the multi-axis linkage machining center can achieve adaptive flexible clamping through the use of the correction mechanism, effectively suppressing machining deformation. Through the correction mechanism composed of mounting block, correction adjustment seat, floating positioning block and multiple correction rods, the contact part between the device and the workpiece is flexibly connected. When the workpiece undergoes slight shrinkage or deformation due to cutting force or internal stress release during the machining process, the floating positioning block can perform slight adaptive adjustment under the action of the hinge structure formed by the correction rods, allowing the clamping point to float accordingly, avoiding secondary stress concentration or local over-clamping caused by forcibly constraining the workpiece deformation, effectively suppressing the overall machining deformation of the workpiece, and ensuring machining accuracy. Attached Figure Description

[0022] Figure 1 This is a partial sectional view of the present invention;

[0023] Figure 2 This is a perspective view of the present utility model;

[0024] Figure 3 This is a partial sectional view of the equidistant adjustment mechanism of this utility model;

[0025] Figure 4 This is a perspective view of the equidistant adjustment mechanism of this utility model;

[0026] Figure 5 This is an exploded cross-sectional view of the correction mechanism of this utility model.

[0027] In the diagram: 1. Multi-axis linkage machining box; 2. Suspension rod; 3. Pressing box; 4. Pressing rod; 5. Mounting block; 6. Floating positioning block; 7. Correcting rod; 8. Adjusting cylinder; 9. Slide groove; 10. Slider; 11. Adjusting motor; 12. Bidirectional screw; 13. Connecting rod assembly; 14. Connecting groove; 15. Correcting and adjusting seat; 16. Guide rod. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0029] Please see Figure 1-5 This utility model provides a technical solution: a workpiece deformation correction fixture for a multi-axis linkage machining center, comprising:

[0030] Multi-axis linkage machining box 1;

[0031] The adjustment mechanism is located inside the multi-axis linkage machining box 1. The adjustment mechanism includes a control component and a pressing box 3. The control component is located inside the multi-axis linkage machining box 1, and there are two pressing boxes 3. Both pressing boxes 3 are located on the control component.

[0032] The equidistant adjustment mechanism comprises two sets, each set housed within a pressing box 3. Each equidistant adjustment mechanism includes an adjustment component and pressing rods 4. The adjustment component is located within the pressing box 3, and multiple pressing rods 4 are movably connected within the pressing box 3 and connected to the adjustment component.

[0033] The correction mechanism is provided in multiple sets. Each set of correction mechanisms is located at the bottom of each pressing rod 4. Each set of correction mechanisms includes a mounting block 5, a floating positioning block 6, a correction rod 7, and a correction adjustment seat 15. The mounting block 5 is fixedly connected to the bottom of the pressing rod 4. The correction adjustment seat 15 is movably connected inside the mounting block 5. The floating positioning block 6 is fixedly connected to the bottom of the correction adjustment seat 15. There are multiple correction rods 7. One end of each correction rod 7 is rotatably connected to the top four corners inside the mounting block 5, and the other end of each correction rod 7 is rotatably connected to the top four corners of the correction adjustment seat 15.

[0034] In this implementation scheme: the multi-axis linkage machining box 1 is existing technology and will not be described in detail here. The pressing rods 4 are adjusted at equal intervals in the pressing box 3 to press the workpieces that need to be positioned at equal intervals, so that the workpieces are evenly stressed and the workpieces are prevented from deforming due to uneven stress during operation. One pressing rod 4 in the middle is fixed in the pressing box 3, so that the pressing rods 4 on both sides can move synchronously. The mounting block 5, floating positioning block 6, straightening rod 7 and straightening adjustment seat 15 cooperate one by one, so that the floating positioning block 6 can be used according to the shrinkage of the workpiece during use, avoiding the shrinkage of the workpiece during positioning from affecting the overall structure.

[0035] Specifically, the control components include a suspension assembly, a positioning motor 11, and a bidirectional screw 12. Suspension rods 2 are fixedly connected to both sides of the top of the multi-axis linkage machining box 1. Two pressing boxes 3 are slidably connected to the two suspension rods 2. The bidirectional screw 12 is rotatably connected to the top of the multi-axis linkage machining box 1, and both ends of the bidirectional screw 12 are threadedly connected to the two pressing boxes 3 respectively. The positioning motor 11 is fixedly connected to the top center of one side of the outer surface of the multi-axis linkage machining box 1, and the output end of the positioning motor 11 is fixedly connected to one end of the bidirectional screw 12.

[0036] In this embodiment, the model of the adjustment motor 11 can be selected from those available on the market as needed, which will not be elaborated here. The adjustment motor 11 controls the bidirectional screw 12 to rotate, thereby controlling the two pressing boxes 3 to move away or closer synchronously.

[0037] Specifically, the adjustment components include:

[0038] A drive assembly is mounted on the press box 3 and is connected to one of the press levers 4;

[0039] Linkage components are located on multiple pressing levers 4; and

[0040] A guide assembly is located inside the pressing box 3, and the guide assembly is connected to multiple pressing rods 4.

[0041] In this embodiment, the drive component, linkage component, and guide component cooperate with each other to complete the spacing adjustment of the pressing rod 4.

[0042] Specifically, the drive assembly includes an adjustable cylinder 8, a slide groove 9, and a slider 10. The adjustable cylinder 8 is fixedly connected inside the pressing box 3. The slide groove 9 is opened on one side of the outer surface of the pressing box 3. The slider 10 is slidably connected inside the slide groove 9. The slider 10 is fixedly connected to one end of the adjustable cylinder 8 and is also fixedly connected to one of the pressing rods 4.

[0043] In this embodiment, the model of the adjusting cylinder 8 can be selected from those available on the market as needed, which will not be elaborated here. The adjusting cylinder 8 controls the slider 10 to move in the slide groove 9, thereby moving one of the pressing rods 4 and realizing the adjustment of the distance between multiple pressing rods 4.

[0044] Specifically, the linkage assembly includes a linkage group 13 and a connecting groove 14. Multiple connecting grooves 14 are provided, and each connecting groove 14 is opened on each pressing rod 4. The linkage group 13 is located in multiple connecting grooves 14, and the linkage group 13 is connected to multiple connecting grooves 14.

[0045] In this embodiment, the connecting rod assembly 13 opens and closes within the connecting groove 14, causing multiple pressing rods 4 to move synchronously.

[0046] Specifically, the guide assembly includes guide rods 16, and there are two guide rods 16. Both guide rods 16 are fixedly connected to the pressing box 3, and multiple pressing rods 4 are slidably connected to the two guide rods 16.

[0047] In this embodiment, the guide rod 16 restricts the movement path of the pressing rod 4 to ensure stability during use.

[0048] In use, the workpiece is placed in the multi-axis linkage processing box 1. According to the position of the workpiece, the adjustment motor 11 controls the bidirectional screw 12 to rotate, adjusting the relative distance between the two pressing boxes 3 to align with the workpiece. According to the size of the workpiece, the distance adjustment cylinder 8 extends and retracts, causing the slider 10 to move in the slide groove 9. The included angle is adjusted in the connecting groove 14 through the connecting rod group 13, completing the synchronous spacing adjustment of multiple pressing rods 4. The workpiece is pressed by the straightening and adjusting seat 15. During the pressing process, the floating positioning block 6 can be finely adjusted in the mounting block 5 by the straightening rod 7, ensuring that the workpiece shrinks and adjusts accordingly during processing.

[0049] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0050] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A workpiece deformation correction fixture for a multi-axis linkage machining center, characterized in that, include: Multi-axis linkage machining box (1); The adjustment mechanism is located inside the multi-axis linkage machining box (1). The adjustment mechanism includes a control component and a pressing box (3). The control component is located inside the multi-axis linkage machining box (1). There are two pressing boxes (3), and both pressing boxes (3) are located on the control component. The equidistant adjustment mechanism is provided in two sets, each set of which is located in each pressing box (3). Each equidistant adjustment mechanism includes an adjustment component and pressing rods (4). The adjustment component is located in the pressing box (3), and multiple pressing rods (4) are provided. All pressing rods (4) are movably connected to the pressing box (3), and all pressing rods (4) are connected to the adjustment component. The correction mechanism is provided in multiple sets. Each set of correction mechanisms is located at the bottom of each pressing rod (4). Each set of correction mechanisms includes a mounting block (5), a floating positioning block (6), a correction rod (7), and a correction adjustment seat (15). The mounting block (5) is fixedly connected to the bottom of the pressing rod (4). The correction adjustment seat (15) is movably connected inside the mounting block (5). The floating positioning block (6) is fixedly connected to the bottom of the correction adjustment seat (15). There are multiple correction rods (7). One end of each correction rod (7) is rotatably connected to the top four corners of the mounting block (5), and the other end of each correction rod (7) is rotatably connected to the top four corners of the correction adjustment seat (15).

2. The workpiece deformation correction fixture for a multi-axis linkage machining center according to claim 1, characterized in that, The control components include a suspension assembly, a positioning motor (11), and a bidirectional screw (12). The top two sides of the multi-axis linkage machining box (1) are fixedly connected to suspension rods (2). The two pressing boxes (3) are slidably connected to the two suspension rods (2). The bidirectional screw (12) is rotatably connected to the top of the multi-axis linkage machining box (1), and the two ends of the bidirectional screw (12) are threadedly connected to the two pressing boxes (3) respectively. The positioning motor (11) is fixedly connected to the top center of one side of the outer surface of the multi-axis linkage machining box (1), and the output end of the positioning motor (11) is fixedly connected to one end of the bidirectional screw (12).

3. The workpiece deformation correction fixture for a multi-axis linkage machining center according to claim 2, characterized in that, The adjustment component includes: A drive assembly is located on the press box (3) and is connected to one of the press levers (4); Linkage components are provided on multiple pressing levers (4); and The guide assembly is located inside the pressing box (3) and is connected to multiple pressing rods (4).

4. The workpiece deformation correction fixture for a multi-axis linkage machining center according to claim 3, characterized in that, The drive assembly includes an adjustable cylinder (8), a slide groove (9), and a slider (10). The adjustable cylinder (8) is fixedly connected to the press box (3). The slide groove (9) is opened on one side of the outer surface of the press box (3). The slider (10) is slidably connected to the slide groove (9). The slider (10) is fixedly connected to one end of the adjustable cylinder (8) and is fixedly connected to one of the press rods (4).

5. The workpiece deformation correction fixture for a multi-axis linkage machining center according to claim 4, characterized in that, The linkage assembly includes a linkage group (13) and a connecting groove (14). There are multiple connecting grooves (14), and each connecting groove (14) is opened on each pressing rod (4). The linkage group (13) is located in multiple connecting grooves (14), and the linkage group (13) is connected to multiple connecting grooves (14).

6. The workpiece deformation correction fixture for a multi-axis linkage machining center according to claim 5, characterized in that, The guiding assembly includes two guide rods (16), both of which are fixedly connected to the pressing box (3), and multiple pressing rods (4) are slidably connected to the two guide rods (16).

Images