A milling fixture for connecting shaft workpiece machining

Abstract

The utility model relates to a kind of milling clamps for connecting shaft workpiece processing, including clamping body, fixed V block, movable V block, push rod and rocking handle;Clamping body is integrated rectangular structure, bottom is equipped with installation reference surface, upper surface is equipped with multiple mounting holes;Fixed V block is fixed on clamping body, the V groove surface of fixed V block faces movable V block;V groove surface is equipped with installation platform;Movable V block includes support table, clamping body and connecting portion, clamping body and connecting portion are slidably arranged in the top of support table, V groove is equipped on clamping body and is used to adhere to the outer circle of workpiece, connecting portion is arranged in clamping body end, and is connected with push rod;Push rod is horizontally arranged, and one end is connected with the connecting portion of movable V block, and the other end is connected to rocking handle;Rocking handle is installed outside clamping body.The utility model solves the technical problems of low positioning accuracy, low clamping efficiency, non-compact structure and not conducive to batch processing of existing clamp.

Description

Technical Field

[0001] This utility model relates to the field of fixture structure technology, and in particular to a milling fixture for machining connecting shaft workpieces. Background Technology

[0002] Connecting shafts, as a typical rotating component, are widely used in power transmission systems to achieve torque transmission and positional connection between power components. During the machining process, ensuring the coaxiality, perpendicularity, and critical dimensional accuracy of the connecting shaft, as well as the stability of its positioning and clamping, directly affects the assembly quality and operational reliability of the final product.

[0003] Traditional machining of connecting shafts often uses general-purpose clamping plates or screw mechanism fixtures for clamping. These fixtures are usually simple in structure and low in machining cost, but they have the following technical shortcomings: (1) The positioning method mainly relies on single-plane pressing or single-point contact, which has low positioning accuracy and is prone to workpiece displacement; (2) Clamping devices mostly use screw clamping, which is cumbersome to operate, has low clamping efficiency, and is not conducive to improving the processing cycle. (3) The fixture setup and adjustment time is long and the repeated clamping accuracy is poor, making it difficult to meet the needs of small and medium batch repeated processing; (4) The structure is not compact enough, which limits its layout and integrated application on standard machine tools or automated lines.

[0004] Therefore, it is necessary to design a special milling fixture with high positioning accuracy, stable clamping, convenient operation, and compact structure, which can be used for batch processing of connecting shaft parts and improve processing efficiency and product quality stability. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a milling fixture for machining connecting shaft workpieces with high structural integration, high machining accuracy and high production stability.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A milling fixture for machining connecting shaft workpieces includes a fixture body, a fixed V-block, a movable V-block, a push rod, and a crank handle. The fixture body is an integral rectangular structure with a mounting reference surface at the bottom for mounting on a machine tool worktable, and multiple mounting holes on the upper surface. The fixed V-block is fixed to the fixture body, with its V-groove facing the movable V-block for contacting the outer circle of the connecting shaft workpiece to achieve radial positioning. A mounting platform is provided within the V-groove for vertical positioning of the workpiece. The movable V-block includes a support platform, a clamping body, and a connecting part. The clamping body and the connecting part are slidably mounted on the top of the support platform. The clamping body has a V-groove for fitting the outer circle of the workpiece, and the connecting part is located at the end of the clamping body and connected to the push rod. The push rod is horizontally positioned, with one end engaging with the connecting part of the movable V-block and the other end connected to the crank handle. The crank handle is mounted on the outside of the fixture body, and manual rotation drives the push rod to move axially along the direction of the fixture body, thereby driving the movable V-block to perform a clamping action.

[0007] Furthermore, both the fixed V-block and the movable V-block are fixed to the upper surface of the clamping body by multiple screws at the bottom.

[0008] Furthermore, the V-groove opening angle of the fixed V-block is 90°, which is used to form two contact points to position the connecting shaft workpiece.

[0009] Furthermore, the push rod and the movable V-block are engaged by a groove, allowing for fine-tuning of the angle during pushing to accommodate positional changes during clamping.

[0010] Furthermore, the crank and the push rod are connected by a key to prevent relative slippage.

[0011] Furthermore, the clamping body is provided with a limiting screw at the end position of the movable V-block in the direction of movement to prevent the movable V-block from moving beyond its travel.

[0012] Furthermore, the clamping body of the movable V-block and its connecting part are integrally formed.

[0013] Furthermore, a tool setting block is provided on the side of the upper surface of the fixture body. The tool setting block is located in front of the drill bit feed direction and faces the workpiece.

[0014] The milling fixture described above for machining connecting shaft workpieces solves the problems of unstable positioning, low clamping efficiency, and inconvenient adjustment of connecting shafts in milling by setting up a fixture body, fixed V-blocks and movable V-blocks, and forming an adjustable clamping mechanism with push rods and rocker handles. It achieves reliable clamping and positioning of the outer circle of the connecting shaft, and improves the convenience of fixture use and machining stability. Attached Figure Description

[0015] Figure 1This is a sectional view of the milling fixture provided by this utility model; Figure 2 This is a top view of the milling fixture provided according to this utility model. Detailed Implementation

[0016] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0017] like Figure 1 and Figure 2 As shown, this application provides a milling fixture for machining connecting shaft workpieces, including a fixture body 1, a fixed V-block 2, a movable V-block 3, a push rod 5, and a rocker handle 6.

[0018] Specifically, the fixture body 1 is an integral rectangular structure with a mounting reference surface at the bottom for mounting on the machine tool worktable, and multiple mounting holes on the upper surface. The fixed V-block 2 is fixed on the fixture body 1, with the V-groove surface of the fixed V-block 2 facing the movable V-block 3 for contacting the outer circle of the workpiece on the connecting shaft to achieve radial positioning. The mounting platform 4 is provided in the V-groove surface for vertical positioning of the workpiece. The movable V-block 3 includes a support platform 31, a clamping body 32, and a connecting part 33. The clamping body 32 and the connecting part 33 are slidably disposed on the top of the support platform 31. The clamping body 32 has a V-groove for fitting the outer circle of the workpiece. The connecting part 33 is disposed at the end of the clamping body 32 and connected to the push rod 5. The push rod 5 is horizontally disposed, with one end engaging with the connecting part 33 of the movable V-block 3 and the other end connected to the crank handle 6. The crank handle 6 is installed on the outside of the fixture body 1. By manually rotating it, the push rod 5 is driven to move axially along the direction of the fixture body 1, thereby driving the movable V-block 3 to achieve clamping action.

[0019] This embodiment is based on the principle of mechanical clamping. It uses a V-block for bidirectional positioning to radially position the outer circle of the workpiece connecting the shaft, achieving stable and reliable clamping. The fixed V-block 2 serves as a reference positioning element, while the movable V-block 3 moves forward under the drive of the push rod 5 and the crank handle 6, contacting the workpiece surface and generating clamping force. The push rod 5 is engaged with the movable V-block 3, allowing for small-angle deflection during clamping to accommodate minor positional deviations of the workpiece, thus ensuring the self-adaptability of the clamping. The overall structure is compact, and the use of a rotary-driven linear propulsion method for the moving parts simplifies the operation steps and improves clamping efficiency. The fixture is suitable for mass production environments, helping to improve processing efficiency and reduce the risk of mis-clamping.

[0020] In other alternative embodiments, the connection between the push rod 5 and the movable V-block 3 can be replaced with a ball joint snap-fit ​​to provide a larger adjustment angle; the crank handle 6 can also be replaced with a knob structure with a limit to adapt to the space constraints of different workstations. The number and position of the mounting holes of the fixture body 1 can be adjusted according to the size of the machine tool table to achieve universal compatibility.

[0021] Both the fixed V-block 2 and the movable V-block 3 are fixed to the upper surface of the clamping body 1 by multiple screws at the bottom, which significantly improves the installation strength and positioning reliability of the V-block.

[0022] The V-groove opening angle of the fixed V-block 2 is 90°, which forms two contact points to position the connecting shaft workpiece. The 90° V-groove opening angle not only simplifies the structure and makes manufacturing easier, but also provides reliable positioning and strong versatility, making it suitable for most standard cylindrical workpieces within a wide diameter range. This structure has excellent self-centering characteristics, effectively improving the repeatability of workpiece installation and machining stability.

[0023] The push rod 5 and the movable V-block 3 are engaged by a groove, allowing for fine-tuning of the angle during pushing to accommodate positional changes during clamping. This increases the flexibility of the pushing mechanism, enabling the clamping system to automatically adjust the contact angle of the V-block under actual working conditions, thus improving the adaptability of clamping and the stability of the workpiece clamping process.

[0024] The crank handle 6 and the push rod 5 are connected by a key to prevent relative slippage. This keyed connection effectively improves the transmission reliability of the rotating mechanism, preventing slippage caused by insufficient friction or fatigue wear, and ensuring precise and efficient clamping. This structure offers advantages such as high transmission efficiency, easy installation, and low maintenance costs, making it particularly suitable for clamping structures requiring frequent operation.

[0025] The clamp body 1 has a limit screw at the end of the movable V-block 3 in the direction of movement to prevent the movable V-block 3 from moving beyond its travel range. By setting the limit screw, excessive movement of the movable V-block 3 due to operator error or excessive torque during use can be effectively prevented, ensuring the structural safety and service life of the clamp. In other optional embodiments, the limit element can be in the form of an elastic buffer pad, a mechanical stop block, or a limit switch.

[0026] The clamping body 32 of the movable V-block 3 and its connecting part 33 are integrally formed, which simplifies the number of components, reduces the difficulty of assembly and maintenance, and improves the strength and rigidity of the overall fixture structure.

[0027] The upper surface of the fixture body 1 is provided with a tool setting block 7. The tool setting block 7 is located in front of the drill bit in the feed direction and faces the workpiece. It is used to provide an axial tool setting reference for the drill bit before drilling to ensure that the drill bit and the drill bushing guide hole are accurately aligned in the initial position, so as to ensure the machining accuracy of the workpiece.

[0028] The above description of embodiments of the present invention, through which those skilled in the art are able to implement or use the present invention, will be readily apparent to those skilled in the art. Various modifications to these embodiments will be readily apparent to those skilled in the art. The general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novelty disclosed herein.

Claims

1. A milling fixture for machining connecting shaft workpieces, characterized in that, It includes a clamping body (1), a fixed V-block (2), a movable V-block (3), a push rod (5), and a rocker arm (6); The clamping body (1) is an integral rectangular structure with a mounting reference surface at the bottom for mounting on the machine tool worktable, and multiple mounting holes on the upper surface; The fixed V-block (2) is fixed on the clamping body (1). The V-groove surface of the fixed V-block (2) faces the movable V-block (3) and is used to contact the outer circle of the connecting shaft workpiece to achieve radial positioning. The V-groove surface is provided with an installation platform (4) for vertical positioning of the workpiece. The movable V-block (3) includes a support platform (31), a clamping body (32), and a connecting part (33). The clamping body and the connecting part are slidably disposed on the top of the support platform (31). The clamping body (32) is provided with a V-groove for fitting the outer circle of the workpiece. The connecting part (33) is disposed at the end of the clamping body (32) and connected to the push rod (5). The push rod (5) is set horizontally, with one end engaged with the connecting part (33) of the movable V-block (3) and the other end connected to the rocker handle (6). The crank (6) is installed on the outside of the clamping body (1). By manually rotating it, the push rod (5) moves axially along the direction of the clamping body (1), thereby driving the movable V-block (3) to achieve the clamping action.

2. The milling fixture according to claim 1, characterized in that, Both the fixed V-block (2) and the movable V-block (3) are fixed to the upper surface of the clamping body (1) by multiple screws at the bottom.

3. The milling fixture according to claim 1, characterized in that, The V-groove opening angle of the fixed V-block (2) is 90°, which is used to form two contact points to position the connecting shaft workpiece.

4. The milling fixture according to claim 1, characterized in that, The push rod (5) and the movable V-block (3) are engaged by a groove, allowing for fine-tuning of the angle during pushing to accommodate position changes during clamping.

5. The milling fixture according to claim 1, characterized in that, The crank (6) and the push rod (5) are connected by a key to prevent relative slippage.

6. The milling fixture according to claim 1, characterized in that, The clamping body (1) is provided with a limiting screw at the end position of the movable V-block (3) in the direction of movement, which is used to prevent the movable V-block (3) from moving beyond its stroke.

7. The milling fixture according to claim 1, characterized in that, The clamping body (32) and its connecting part (33) of the movable V-block (3) are integrally formed.

8. The milling fixture according to claim 1, characterized in that, The upper surface of the clamping body (1) is provided with a tool setting block (7), which is located in front of the drill bit feed direction and facing the workpiece.

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