A joint workpiece clamping tool

Abstract

The utility model relates to the field of machining, concretely relates to a joint workpiece clamping tool, including base, be equipped with trial boring seat and two supporting blocks on the base, the supporting block is compatible with the shape of joint workpiece lower inner chamber, the height of supporting block is greater than the depth of joint workpiece lower inner chamber, be equipped with mounting hole on the supporting block, the mounting hole is equipped with fastening bolt, the trial boring seat is detachably equipped with trial boring block, the trial boring block is equipped with trial boring hole, the trial boring hole is compatible with the lug hole of the top lug of joint workpiece, the utility model discloses through setting up the supporting block compatible with the shape of workpiece lower inner chamber, can utilize workpiece self inner chamber structure to realize quick, accurate positioning and stable support, effectively solved the technical problem that the special-shaped workpiece is difficult to reliably fixed because of lacking external clamping reference.

Description

Technical Field

[0001] This utility model relates to the field of machining, and in particular to a clamping fixture for joint workpieces. Background Technology

[0002] In aerospace, precision instruments, and other fields, various complex, irregularly shaped joint workpieces are widely used. These workpieces are typically designed to meet functional requirements, have irregular external contours, and lack datum planes or locating holes for direct clamping on machine tools. The holes on their top lugs need to meet extremely high requirements for coaxiality, positional accuracy, and dimensional precision. In existing technologies, the clamping and machining of such workpieces typically employ the following methods: 1. Special large fixture method: A complex special fixture is designed and manufactured to fit the shape of the workpiece. The workpiece is wrapped and fixed by contour positioning surface. Although the positioning is reliable, the fixture itself has a complex structure, high design and manufacturing cost, long production cycle, and is usually only applicable to a single product with very poor versatility. It is not economical for small batch and multi-variety production mode.

[0003] 2. Modular fixture assembly method: Using standard modular fixture components, a positioning and clamping structure is temporarily assembled on the platform. Although this method is highly flexible, the assembly process depends on the operator's experience, and the stability and repeatability of positioning accuracy are difficult to guarantee. It cannot meet the stringent requirements of high-precision products such as aerospace parts. At the same time, each clamping requires readjustment and verification, resulting in low production efficiency.

[0004] Therefore, the existing technology lacks a dedicated tooling solution that can quickly, accurately, and reliably clamp such non-reference irregular joint workpieces and ensure the boring accuracy of their top lugs and high machining efficiency. Utility Model Content

[0005] The purpose of this utility model is to overcome the technical problem that irregularly shaped workpieces are difficult to clamp due to the lack of clamping reference, which affects the processing efficiency and quality of the surface and top lugs, and to provide a clamping fixture for joint workpieces.

[0006] This utility model provides a workpiece clamping fixture for joints, including a base, on which a test boring seat and two support blocks are provided; The support block is adapted to the shape of the lower inner cavity of the joint workpiece, and the height of the support block is greater than the depth of the lower inner cavity of the joint workpiece. The support block is provided with mounting holes, and the mounting holes are equipped with fastening bolts. The test boring base is detachably equipped with a test boring block, which has a test boring hole that is adapted to the ear hole of the top ear of the joint workpiece.

[0007] This utility model discloses a fixture for clamping a connector workpiece. First, the base is fixed to the machine tool worktable. Then, the connector workpiece is placed on two support blocks, so that the inner cavity of the lower part of the connector workpiece matches the contour of the support blocks. The process lugs on both sides of the connector workpiece are pressed and fixed to the support blocks through the mounting holes and fastening bolts on the support blocks. Next, the test boring block is installed on the test boring seat and pressed and fixed. Then, the tool setting and coordinate setting of the boring tool are performed with the test boring hole on the test boring block as a reference, and test boring can be performed to verify the program. Finally, the test boring block is removed, the machining program is run, and the lug hole of the top lug of the connector workpiece can be precision bored.

[0008] Preferably, the base is provided with a plurality of positioning holes, and the positioning holes are equipped with positioning pins.

[0009] The positioning holes and positioning pins enable the base to be quickly and accurately positioned on the machine tool table, ensuring the accurate relative position of the tooling and the machine tool, improving the clamping repeatability and positioning accuracy, and reducing the alignment time.

[0010] Preferably, the base is provided with a plurality of fastening holes, and the fastening holes are equipped with clamping bolts.

[0011] The fastening holes and clamping bolts allow the base to be firmly pressed onto the machine tool table, effectively preventing tooling movement or vibration during machining, ensuring cutting stability, and thus improving the quality of hole machining.

[0012] Preferably, the support block includes a bearing plate, the top of which is provided with a plurality of rectangular tubes, the bottom of which are connected to the base.

[0013] The support block, composed of a bearing plate and a rectangular tube, has sufficient rigidity and load-bearing capacity, reducing the risk of deformation; at the same time, the rectangular tube design reduces the overall weight of the tooling, lowers the cost, and facilitates handling and operation.

[0014] Preferably, the support plate and the base are structural components made of No. 45 steel.

[0015] 45 steel is selected and tempered to HRC28-32. It has good strength and toughness, excellent machinability, is easy to manufacture and repair, and is inexpensive. This material can be tempered to obtain higher comprehensive mechanical properties, making it very suitable as a base material for tooling fixtures. It achieves a balance between performance and economy and practicality.

[0016] Preferably, the support plate has a recessed area on the side away from the joint workpiece, and the mounting hole is located in the recessed area.

[0017] The top web of the joint workpiece has a low thickness. To ensure the strength of the process lugs, the thickness of the process lugs needs to be greater than the thickness of the web. Therefore, a step is created between the process lugs and the top web of the joint workpiece. By setting a recessed area on the bearing plate that matches the aforementioned step, the process lugs of the joint workpiece can fall smoothly into the recessed area, ensuring that the web of the joint workpiece can fit against the bearing plate and increasing the clamping stability of the joint workpiece.

[0018] Preferably, the test boring block has a circular groove on the side away from the support block, and the test boring block is disposed in the circular groove.

[0019] The test boring block and the test boring seat are detachably connected, which facilitates the quick installation and replacement of the test boring block. At the same time, the circular groove provides a precise positioning reference for the test boring block, which facilitates the clamping of the test boring block.

[0020] Preferably, the test boring block is provided with a plurality of limiting bolts, which are arranged around the circular groove. Each limiting bolt is provided with a pressure plate, which is used to restrict the test boring block within the circular groove.

[0021] The limit bolts and pressure plates form an adjustable clamping mechanism, which allows for fine adjustment of the clamping force according to the size of the test boring block, ensuring that the test boring block is reliably fixed and preventing loosening during processing; the surrounding design makes the clamping force evenly distributed and improves stability.

[0022] Preferably, the top of the test boring machine is provided with a locking slot, which extends through the circular groove.

[0023] This facilitates the installation or removal of the test boring block in the circular groove.

[0024] Preferably, the test boring seat has a clearance hole on the side away from the circular groove, and the clearance hole communicates with the circular groove.

[0025] The design of the clearance hole can reduce interference during the boring process; at the same time, it allows chips and coolant to be discharged, preventing accumulation that affects accuracy and extending the service life of the tooling.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model provides a workpiece clamping fixture for joints. By setting a support block that matches the shape of the lower inner cavity of the workpiece, it can achieve fast and accurate positioning and stable support by utilizing the inner cavity structure of the workpiece itself, effectively solving the technical problem that irregular workpieces are difficult to fix reliably due to the lack of external clamping reference. 2. This utility model provides a workpiece clamping fixture for a connector. By setting a detachable test boring block and its test boring hole on the test boring seat, it can provide a precise tool setting reference for the boring tool and pre-verify the machining parameters, effectively ensuring the coaxiality and positional accuracy of the top lug hole, and solving the technical problem that it is difficult to guarantee the machining quality of high-precision boring. 3. This utility model provides a clamping fixture for joint workpieces. Through the rigid support of the support block and the quick assembly and disassembly design of the test boring block, the workpiece clamping and tool setting process can be significantly simplified, repeated adjustments can be avoided, and the overall processing efficiency of irregular joint workpieces can be effectively improved. Attached Figure Description

[0027] Figure 1 This is an isometric drawing of a joint workpiece clamping fixture according to this utility model; Figure 2 yes Figure 1 Enlarged view of area A in the middle; Figure 3 This is a schematic diagram of the structure of the test boring seat described in this utility model; Figure 4 This is a front view of the working state diagram of a joint workpiece clamping fixture according to this utility model; Figure 5 This is a top view of the working state diagram of a joint workpiece clamping fixture of this utility model; Marked in the image: 1-Base, 11-Positioning hole, 12-Fasting hole, 2-Support block, 21-Bearing plate, 211-Recessed area, 212-Mounting hole, 22-Rectangular tube, 3-Test boring seat, 31-Circular groove, 32-Allowing hole, 33-Clamping slot, 4-Test boring block, 41-Test boring hole, 5-Limit bolt, 6-Joint workpiece, 61-Top ear, 62-Process ear. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to specific embodiments. However, it should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0029] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of this utility model is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the utility model product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the utility model solution or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on this utility model.

[0030] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," and "parallel" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, or parallel, but rather that it can be slightly tilted or have a deviation. For example, "horizontal" merely means that its direction is more horizontal relative to "vertical," not that the structure must be completely horizontal, but can be slightly tilted. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," or "parallel" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the present invention.

[0031] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0032] Furthermore, in the description of the embodiments of this utility model, "several", "multiple", and "several" represent at least two. The number can be any number, such as two, three, four, five, six, seven, eight, or nine, and can even exceed nine.

[0033] Furthermore, in the description of the technical solution of this utility model, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "equipped with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0034] Example 1 like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, a workpiece clamping fixture includes a base 1, on which a test boring seat 3 and two support blocks 2 are provided; The support block 2 is adapted to the shape of the lower inner cavity of the joint workpiece 6, and the height of the support block 2 is greater than the depth of the lower inner cavity of the joint workpiece 6. The support block 2 is provided with mounting holes 212, and fastening bolts are provided in the mounting holes 212; The test boring base 3 is detachably provided with a test boring block 4, and the test boring block 4 is provided with a test boring hole 41, which is adapted to the ear hole of the top ear 61 of the connector workpiece 6.

[0035] In one or more implementations, such as Figure 1 As shown, positioning holes 11 and fastening holes 12 can be provided on the base 1.

[0036] Positioning hole 11: It is equipped with a positioning pin, which can quickly and accurately position the base 1 on the machine tool worktable, ensure the relative position of the tooling and the machine tool is accurate, improve the clamping repeatability and positioning accuracy, and reduce the alignment time.

[0037] Fastening hole 12: It is equipped with a clamping bolt, which fastens the base 1 on the machine tool worktable to prevent the tooling from moving or vibrating during the processing, ensuring cutting stability and thus improving the hole processing quality.

[0038] In one or more implementations, such as Figure 1 As shown, the support block 2 may include a bearing plate 21 and several rectangular tubes 22.

[0039] Bearing plate 21: Its shape is adapted to the bottom cavity of the joint workpiece 6, and it is used to extend into the bottom of the web.

[0040] Rectangular tube 22; Select an appropriate number of rectangular tubes 22 according to the shape and size of the support plate 21. The top of the rectangular tube 22 is welded to the bottom of the support plate 21, and the bottom of the rectangular tube 22 is welded to the top surface of the base 1.

[0041] In an optional embodiment, both the bearing plate 21 and the base 1 can be made of 45 steel, tempered to HRC28-32. It has good strength and toughness, excellent machinability, is easy to manufacture and repair, and is inexpensive. This material can be tempered to obtain higher comprehensive mechanical properties, making it very suitable as a base material for tooling fixtures. It achieves a balance between economy and practicality while ensuring performance.

[0042] In optional implementations, such as Figure 1 As shown, a recessed area 211 can be provided on the side of the bearing plate 21 away from the joint workpiece 6, and the mounting hole 212 is set in the recessed area 211. The top web of the joint workpiece 6 has a low thickness. In order to ensure the strength of the process lug 62, the thickness of the process lug 62 needs to be greater than the thickness of the web. Therefore, a step is generated between the process lug 62 and the top web of the joint workpiece 6. By providing a recessed area 211 on the bearing plate 21 that is adapted to the aforementioned step, the process lug 62 of the joint workpiece 6 can fall smoothly into the recessed area 211, ensuring that the web of the joint workpiece 6 can fit against the bearing plate 21, thereby increasing the clamping stability of the joint workpiece 6.

[0043] In one or more implementations, such as Figure 3 As shown, a circular groove 31 can be provided on the test boring base 3, and a cylindrical test boring block 4 is nested in the circular groove 31.

[0044] In optional implementations, such as Figure 3 As shown, several limiting bolts 5 can be set on the test boring block 3. The several limiting bolts 5 are arranged around the circular groove 31. Each limiting bolt 5 is provided with a pressure plate. The pressure plate is used to restrict the test boring block 4 within the circular groove 31. The limiting bolts 5 and the pressure plate constitute an adjustable clamping mechanism, which allows for fine adjustment of the clamping force according to the size of the test boring block 4, ensuring that the test boring block 4 is reliably fixed and preventing loosening during processing. The surrounding design makes the clamping force evenly distributed and improves stability.

[0045] In optional implementations, such as Figure 3 As shown, an obstacle hole 32 can be provided on the side of the test boring base 3 away from the circular groove 31. The obstacle hole 32 is connected to the circular groove 31. The design of the obstacle hole 32 can reduce interference during the boring process; at the same time, it allows chips and coolant to be discharged, preventing accumulation from affecting accuracy and extending the service life of the tooling.

[0046] In an optional embodiment, a slot 33 can be provided on the top of the test boring block 3. The width of the slot 33 is between 20mm and 30mm, allowing a person's fingers to pass through normally, which facilitates the installation or removal of the test boring block 4 in the circular groove 31.

[0047] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, using a joint workpiece clamping fixture according to this embodiment includes the following steps: S1: Position the base 1 on the machine tool worktable by passing the positioning pin through the positioning hole 11, and then use the clamping bolt through the fastening hole 12 on the base 1 to firmly press the base 1 onto the machine tool worktable. S2: Hoist the joint workpiece 6 above the two support blocks 2, and slowly lower it so that the lower inner cavity of the workpiece matches the contour of the support block 2, ensuring that the web of the workpiece is completely attached to the bearing plate 21, while the process lugs 62 on both sides of the workpiece fall into the recessed area 211 of the bearing plate 21. S3: Use fastening bolts to pass through mounting holes 212 to press and fix the process lugs 62 onto the support block 2, thus completing the workpiece clamping; S4: Place the test boring block 4 into the circular groove 31 of the test boring seat 3, tighten each limiting bolt 5, and reliably press and fix the test boring block 4 by means of the pressure plate; S5: Using the test boring hole 41 on the test boring block 4 as a reference, perform tool setting and coordinate setting of the boring tool, and verify the correctness of the machining program through test boring operation; S6: Run the formal machining program to perform precision boring on the ear hole of the top ear plate 61 of the workpiece; S7: After processing is completed, loosen the fastening bolts and lift and unload the processed joint workpiece 6.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A clamping fixture for a joint workpiece (6), characterized in that, Includes a base (1), on which a test boring seat (3) and two support blocks (2) are provided; The support block (2) is adapted to the shape of the lower inner cavity of the connector workpiece (6), and the height of the support block (2) is greater than the depth of the lower inner cavity of the connector workpiece (6). The support block (2) is provided with mounting holes (212), and the mounting holes (212) are equipped with fastening bolts; The test boring base (3) is detachably provided with a test boring block (4), and the test boring block (4) is provided with a test boring hole (41), which is adapted to the ear hole of the top ear (61) of the connector workpiece (6).

2. The clamping fixture for a joint workpiece (6) according to claim 1, characterized in that, The base (1) is provided with a plurality of positioning holes (11), and the positioning holes (11) are equipped with positioning pins.

3. The clamping fixture for a joint workpiece (6) according to claim 2, characterized in that, The base (1) is provided with several fastening holes (12), and the fastening holes (12) are equipped with clamping bolts.

4. The clamping fixture for a joint workpiece (6) according to claim 1, characterized in that, The support block (2) includes a bearing plate (21), and the top of the bearing plate (21) is provided with a plurality of rectangular tubes (22), and the bottom of the rectangular tubes (22) is connected to the base (1).

5. The clamping fixture for a joint workpiece (6) according to claim 4, characterized in that, The bearing plate (21) and the base (1) are structural components made of No. 45 steel.

6. The clamping fixture for a joint workpiece (6) according to claim 4, characterized in that, The bearing plate (21) has a recessed area (211) on the side away from the joint workpiece (6), and the mounting hole (212) is located in the recessed area (211).

7. A clamping fixture for a joint workpiece (6) according to any one of claims 1-6, characterized in that, The test boring seat (3) has a circular groove (31) on the side away from the support block (2), and the test boring block (4) is disposed in the circular groove (31).

8. The clamping fixture for a joint workpiece (6) according to claim 7, characterized in that, The test boring base (3) is provided with a number of limiting bolts (5), which are arranged around the circular groove (31). Each limiting bolt (5) is provided with a pressure plate, which is used to restrict the test boring block (4) within the circular groove (31).

9. The clamping fixture for a joint workpiece (6) according to claim 7, characterized in that, The test boring seat (3) has a locking slot (33) at the top, and the locking slot (33) passes through the circular groove (31).

10. The clamping fixture for a joint workpiece (6) according to claim 7, characterized in that, The test boring seat (3) has a clearance hole (32) on the side away from the circular groove (31), and the clearance hole (32) is connected to the circular groove (31).

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