Workpiece fixing tool of milling machine
Through the design of the support platform and fixing mechanism, and the cooperation of the chuck and pressure beam, the problems of high difficulty and low efficiency in the workpiece fixing operation of existing milling machines have been solved, realizing rapid clamping and unclamping, and adapting to the efficient fixing of workpieces of different models and shapes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- ZHONGSHAN GSI MARINE ENG CO LTD
- Filing Date
- 2023-07-27
- Publication Date
- 2026-06-26
AI Technical Summary
Existing milling machine workpiece fixing methods are difficult to operate, inefficient, and cumbersome to disassemble, making them unsuitable for workpieces of different models and shapes.
The workpiece fixing fixture includes a support platform and a fixing mechanism. The fixing mechanism consists of at least two sets of limiting components. The chuck is movable and, in conjunction with the pressure beam and the support screw, achieves quick clamping and unclamping through the cooperation of the bayonet and the support screw, adapting to workpieces of different widths and heights.
It enables rapid clamping and unclamping of workpieces, is simple to operate, has good applicability, adapts to workpieces of different models and shapes, and improves operating efficiency.
Smart Images
Figure CN116713778B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of tooling technology, and more particularly to a workpiece fixing fixture for a milling machine. Background Technology
[0002] In shipbuilding, milling machines are often used to flatten the end faces of workpieces (such as columns or beams). Before milling, the workpiece needs to be fixed to the working surface. Currently, two methods are generally used to fix the workpiece: 1. Using a weight to press the workpiece firmly onto the milling machine's working surface. This method can only fix workpieces that can be placed stably on the working surface. Since the weight of the weight is approximately 5 tons, both pressing and adjusting the workpiece's position require lifting the weight, making the operation difficult and inefficient.
[0003] 2. Using a plate welding method, the workpiece is fixed to the working surface by welding the plate. This method requires air gouging to remove the plate when removing the workpiece, and also requires repairing the welding position between the workpiece and the plate. The operation is cumbersome and time-consuming. Summary of the Invention
[0004] The purpose of this invention is to provide a workpiece fixing fixture for a milling machine, which can quickly clamp or release the workpiece, and is simple to operate and has good applicability.
[0005] To achieve this objective, the present invention adopts the following technical solution:
[0006] A workpiece fixing fixture for a milling machine is provided, including a support table for supporting the workpiece and a fixing mechanism disposed on the support table. The fixing mechanism includes at least two sets of limiting components, which are spaced apart along a first horizontal direction. Each set of limiting components includes a first limiting component and a second limiting component. The first limiting component includes two chucks spaced apart along a second horizontal direction. The two chucks are movable in the second horizontal direction to selectively abut against the workpiece on opposite sides in the second horizontal direction. The second horizontal direction is set at an angle to the first horizontal direction. The second limiting component includes a liftable pressure beam and a first support screw and a second support screw spaced apart in the second horizontal direction. One end of the first support screw and one end of the second support screw are both tightened onto the support table. The other ends of the first support screw and the second support screw extend beyond the upper surface of the support table. One end of the pressure beam is rotatably connected to the first support screw, and the other end is provided with a snap-fit hole. A latch is provided on one side of the snap-fit hole. The second support screw is snapped into the snap-fit hole through the latch. The pressure beam is used to abut against the upper side of the workpiece.
[0007] As a preferred technical solution for the workpiece fixing fixture of the milling machine, the first limiting component further includes two driving members, each of which corresponds to one of the chucks. The driving members are connected to the chucks and are used to drive the chucks to move in the second horizontal direction so that the chucks move away from or closer to the workpiece.
[0008] As a preferred technical solution for the workpiece fixing fixture of the milling machine, the driving component includes a fixed seat and a driving screw. The fixed seat is located on the side of the chuck away from the workpiece and is disposed on the upper surface of the support table. The fixed seat is provided with a threaded hole that mates with the driving screw. The chuck includes a clamping plate and a limiting plate. The clamping plate and the limiting plate are spaced apart along the second horizontal direction, forming a limiting channel between the clamping plate and the limiting plate. The clamping plate is disposed close to the workpiece for contact with the workpiece, and the limiting plate is disposed away from the workpiece. The clamping plate and the limiting plate are connected by a connecting plate. The limiting plate is provided with a through hole. One end of the driving screw passes through the threaded hole and the through hole in sequence and extends into the limiting channel. The end of the driving screw located in the limiting channel is connected to a driving plate. The driving plate is movably disposed in the limiting channel. The end of the driving screw away from the driving plate protrudes from the fixed seat, forming an operating part.
[0009] As a preferred technical solution for the workpiece fixing fixture of the milling machine, the chuck includes two connecting plates, which are disposed on opposite sides of the limiting plate.
[0010] As a preferred technical solution for the workpiece fixing fixture of the milling machine, an operating handle is connected to the operating part.
[0011] As a preferred technical solution for the workpiece fixing fixture of the milling machine, the operating handle is provided with a connecting block, which is detachably connected to the operating part through a threaded structure.
[0012] As a preferred technical solution for the workpiece fixing fixture of the milling machine, the fixing seat is detachably connected to the support table by fasteners. The bottom of the fixing seat is provided with a first fastening hole, and the support table is provided with a second fastening hole. The fastener passes through the fastening hole and is tightened in the second fastening hole.
[0013] As a preferred technical solution for the workpiece fixing fixture of the milling machine, the support table is provided with a plurality of second fastening holes in the second horizontal direction, and the plurality of second fastening holes are distributed at intervals in the second horizontal direction.
[0014] As a preferred technical solution for the workpiece fixing fixture of the milling machine, a fixing nut is fixed on the support platform, and the first support screw and the second support screw are each corresponding to the fixing nut. The lower end of the first support screw passes through the support platform and is tightened in the corresponding fixing nut, and the lower end of the second support screw passes through the support platform and is tightened in the corresponding fixing nut.
[0015] A preferred technical solution for the workpiece fixing fixture of the milling machine includes at least two fixing mechanisms, which are spaced apart along the second horizontal direction.
[0016] The beneficial effects of this invention are as follows: This workpiece fixing fixture has two movable chucks in the second horizontal direction, allowing the two chucks to clamp workpieces of different widths. Through the cooperation of the pressure beam and the chucks, the workpiece is limited in both the horizontal and vertical directions, firmly fixing it to the support table. It is also suitable for workpieces of different models and shapes, exhibiting good adaptability. Through the cooperation of the bayonet and the support screw, the workpiece can be quickly pressed between the pressure beam and the support table or quickly removed from the pressure beam and the support table. The operation is simple and efficient, and the placement angle of the workpiece on the support table can be adjusted by finely adjusting the position of the chucks. Attached Figure Description
[0017] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.
[0018] Figure 1 This is a three-dimensional structural diagram of the workpiece fixing fixture of the milling machine described in the embodiment.
[0019] Figure 2 This is a top view of the chuck, mounting base, and drive component described in the embodiment.
[0020] Figure 3 This is a top view of the pressure beam described in the embodiment.
[0021] In the picture:
[0022] 100. Workpiece; 101. Crossbeam; 102. End plate; 200. Fixing mechanism;
[0023] 1. Support platform; 11. Second fastening hole; 2. First limiting component; 21. Clamp; 211. Abutment plate; 212. Limiting plate; 213. Connecting plate; 214. Limiting channel; 22. Fixing base; 221. Mounting plate; 222. First fastening hole; 23. Driving component; 231. Driving screw; 2311. Operating part; 232. Driving plate; 234. Operating handle; 235. Connecting block; 3. Second limiting component; 31. First support screw; 32. Second support screw; 33. Pressure beam; 331. Connecting hole; 332. Snap-in hole; 333. Bayonet; 34. Limiting nut; 35. Nut. Detailed Implementation
[0024] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0025] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0026] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0027] like Figures 1 to 3 As shown, the present invention provides a workpiece fixing fixture for a milling machine (hereinafter referred to as the workpiece fixing fixture), including a support table 1 for supporting a workpiece 100 and a fixing mechanism 200 disposed on the support table 1. The fixing mechanism 200 includes at least two sets of limiting components, and the at least two sets of limiting components are arranged along a first horizontal direction (i.e., Figure 1The limiting components are spaced apart in the Y-direction, and each set of limiting components includes a first limiting component 2 and a second limiting component 3. The first limiting component 2 includes two clamps 21 spaced apart in the second horizontal direction, and the two clamps 21 can be positioned in the second horizontal direction (i.e., in the Y direction). Figure 1The two chucks 21 move in the X direction to selectively abut against the workpiece 100 on both sides opposite each other in the second horizontal direction, which is set at an angle to the first horizontal direction. In this example, the second horizontal direction is perpendicular to the first horizontal direction. When the two chucks 21 abut against the workpiece 100 on both sides in the second horizontal direction, the two chucks 21 clamp the workpiece 100, thus restricting the workpiece 100 from moving in the second horizontal direction. The second limiting component 3 includes a liftable pressure beam 33 and a first support screw 31 and a second support screw 32 spaced apart in the second horizontal direction. One end of the first support screw 31 and one end of the second support screw 32 are both tightened onto the support platform 1. The other ends of the first support screw 31 and the second support screw 32 extend beyond the upper surface of the support platform 1. One end of the pressure beam 33 is rotatably connected to the first support screw 31, and the other end is provided with a snap-fit hole 332. A latch 333 is provided on one side of the snap-fit hole 332, and the latch 333 communicates with the interior of the snap-fit hole 332. The second support screw 32 is snapped into the snap-fit hole 332 through the latch 333. When the pressure beam 33 is fastened to the second support screw 32 through the snap-fit hole 332, the first support screw 31, the second support screw 32, and the pressure beam 33 form a gantry. When the pressure beam 33 is fastened to the second support screw 32, rotating the first support screw 31 and the second support screw 32 can adjust the distance between the pressure beam 33 and the support platform 1, so that the pressure beam 33 can press the workpiece 100 of different heights. By setting a latch 333 on one side of the latch hole 332, one end of the pressure beam 33 can be rotated around the first support screw 31, so that the end of the pressure beam 33 with the latch 333 can be quickly fastened into or out of the second support screw 32. This allows for quick assembly and disassembly of the pressure beam 33 and the second support screw 32. In use, after the pressure beam 33 is removed from the second support screw 32 through the latch 333, the workpiece 100 is placed between the pressure beam 33 and the support platform 1, and then the pressure beam 33 is fastened into the second support screw 32. Then, the first support screw 31 and the second support screw 32 are rotated to shorten the distance between the pressure beam 33 and the support platform 1, so that the pressure beam 33 presses the workpiece 100 and restricts the workpiece 100 from moving in the vertical direction. By setting a latch 333 on one side of the latch hole 332, one end of the pressure beam 33 can be rotated around the first support screw 31, so that the end of the pressure beam 33 with the latch 333 can be engaged or disengaged from the second support screw 32. This allows for quick assembly and disassembly of the pressure beam 33 and the second support screw 32.This type of workpiece fixing fixture has two movable chucks 21 in the second horizontal direction, allowing the two chucks 21 to clamp workpieces 100 of different widths. Through the cooperation of the pressure beam 33 and the chucks 21, the workpiece 100 is limited in the horizontal and vertical directions, so that the workpiece 100 is firmly fixed on the support table 1. It is also suitable for workpieces 100 of different models and shapes, and has good adaptability. Through the cooperation of the bayonet 333 and the support screw, the workpiece 100 can be quickly pressed between the pressure beam 33 and the support table 1 or quickly removed from the pressure beam 33 and the support table 1. The operation is simple and efficient, and the placement angle of the workpiece 100 on the support table 1 can be adjusted by fine-tuning the position of the chucks 21.
[0028] Specifically, the end of the first support screw 31 away from the support platform 1 and the end of the second support screw 32 away from the support platform 1 both have nuts 35. The end of the pressure beam 33 away from the snap-fit hole 332 is provided with a connecting hole 331. The end of the first support screw 31 away from the nut 35 passes through the connecting hole 331 and is tightened onto the support platform 1. The pressure beam 33 is snapped onto the part of the second support screw 32 located below the nut 35.
[0029] Furthermore, a limiting nut 34 is screwed onto both the first support screw 31 and the second support screw 32. The limiting nut 34 is located below the nut 35 and is used to press against the upper side of the pressure beam 33. By rotating the limiting nut 34 to press against the pressure beam 33, the upward movement of the pressure beam 33 is restricted.
[0030] The first limiting component 2 also includes two driving components 23, which correspond one-to-one with the chuck 21. The driving components 23 are connected to the chuck 21 and are used to drive the chuck 21 to move in the second horizontal direction so that the chuck 21 moves away from or closer to the workpiece 100. The driving components 23 facilitate the movement of the chuck 21 in the second horizontal direction.
[0031] Specifically, the driving component 23 includes a fixed seat 22 and a driving screw 231. The fixed seat 22 is located on the side of the chuck 21 away from the workpiece 100 and is disposed on the upper surface of the support table 1. The fixed seat 22 is provided with a threaded hole that is screwed into the driving screw 231. The chuck 21 includes a pressing plate 211 and a limiting plate 212. The pressing plate 211 and the limiting plate 212 are spaced apart along the second horizontal direction, and a limiting channel 214 is formed between the pressing plate 211 and the limiting plate 212. The clamping plate 211 is positioned close to the workpiece 100 for contact with the workpiece 100, while the limiting plate 212 is positioned away from the workpiece 100. The clamping plate 211 and the limiting plate 212 are connected by a connecting plate 213. The limiting plate 212 is provided with a through hole. One end of the drive screw 231 extends into the limiting channel 214 by passing through the threaded hole and the through hole in sequence. The end of the drive screw 231 located in the limiting channel 214 is connected to a drive plate 232. The drive plate 232 is movably positioned in the limiting channel 214. The end of the drive screw 231 away from the drive plate 232 protrudes from the fixed seat 22, forming an operating part 2311. The drive plate 232 is always located within the limiting channel 214 between the abutment plate and the limiting plate 212. Through the engagement of the drive screw 231 with the threaded hole, rotating the drive screw 231 allows it to move in the second horizontal direction. The drive plate 232 is fixedly connected to the drive screw 231, and moves synchronously in the second horizontal direction with the drive screw 231. When the drive screw 231 moves towards the abutment plate 211, it pushes the abutment plate 211 towards the workpiece 100, thereby pushing the chuck 21 towards the workpiece 100 as a whole, so that the chuck 21 abuts against one side of the workpiece 100. When the drive screw 231 moves towards the limiting plate 212, the drive plate 232 pushes the limiting plate 212 away from the workpiece 100, thereby pushing the chuck 21 towards the workpiece 100 as a whole, so that the chuck 21 releases its abutment against the workpiece 100.
[0032] In this embodiment, the chuck 21 includes two connecting plates 213, which are disposed on opposite sides of the limiting plate 212. By connecting the opposite sides of the limiting plate 212 with the two connecting plates 213, the overall structural strength of the chuck 21 can be enhanced. Of course, in other embodiments, the connecting plates 213 can also be one, three, or four, etc.
[0033] To facilitate manual rotation of the drive screw 231, an operating handle 234 is connected to the operating part 2311, providing hand grip space for the user.
[0034] Preferably, the operating handle 234 is provided with a connecting block 235, which is detachably connected to the operating part 2311 via a threaded structure. In actual use, the operating handle 234 can be detached from the drive screw 231 via the connecting block 235, and an electric or pneumatic wrench can be connected to the operating part 2311. The electric or pneumatic wrench drives the drive screw 231 to rotate rapidly, allowing the workpiece 100 to be quickly clamped or released, which helps to improve efficiency. Specifically, the connecting block 235 is provided with a threaded hole, and the operating part 2311 is provided with a threaded section that tightens into the threaded hole.
[0035] To facilitate the installation of the mounting base 22 on the support platform 1, the mounting base 22 is detachably connected to the support platform 1 by fasteners. The bottom of the mounting base 22 is provided with a first fastening hole 222, and the support platform 1 is provided with a second fastening hole 11. The fasteners pass through the fastening holes and are tightened in the second fastening holes 11.
[0036] Specifically, the bottom of the fixing base 22 is provided with a mounting plate 221, and the first fastening hole 222 is provided in the mounting plate 221.
[0037] It is understandable that the width of the workpiece 100 in the second horizontal direction varies greatly for different workpieces 100. The support table 1 is provided with multiple second fastening holes 11 in the second horizontal direction. The multiple second fastening holes 11 are distributed at intervals in the second horizontal direction. This design can expand the adjustment range of the distance between the two clamps 21 and further improve the adaptability of the workpiece fixing fixture.
[0038] In actual implementation, the support platform 1 can also be provided with multiple second fastening holes 11 along the first horizontal direction. The multiple second fastening holes 11 are distributed at intervals along the first horizontal direction, so that the chuck 21 can move along the first horizontal direction to adjust the position of the chuck 21 in the first horizontal direction, so that the chuck 21 can abut against different positions of the workpiece 100 in the first horizontal direction.
[0039] In this embodiment, a fixing nut (not shown in the figure) is fixed on the support platform 1. The first support screw 31 and the second support screw 32 are each fitted with a corresponding fixing nut. The lower end of the first support screw 31 passes through the support platform 1 and is tightened into the corresponding fixing nut. Similarly, the lower end of the second support screw 32 passes through the support platform 1 and is tightened into the corresponding fixing nut. The fixing nuts provide space for tightening the support screws. Rotating the support screws allows them to rise or fall relative to the support nuts.
[0040] In this example, the fixing nut is located on the lower surface of the support platform 1, and the support platform 1 is provided with a clearance hole. The support screw passes through the clearance hole and is tightened in the fixing nut.
[0041] In other examples, the fixing nut can also be set on the upper surface of the support platform 1, without making specific restrictions on the setting position of the fixing nut.
[0042] The workpiece fixing fixture includes at least two fixing mechanisms 200, which are spaced apart along a second horizontal direction, so that the workpiece fixing fixture can fix at least two workpieces 100 at the same time.
[0043] In this embodiment, there are two fixing mechanisms 200, and each fixing mechanism 200 has two sets of limiting components.
[0044] The workpiece 100 includes a crossbeam 101 and an end plate 102 connected at an angle to the crossbeam 101. When fixing the workpiece 100, the crossbeam 101 is placed between the support platform 1 and the pressure beam 33. The lower side of the crossbeam 101 abuts against the support platform 1, and the pressure beam 33 abuts against the upper side of the crossbeam 101. The end plate 102 is located on one side of the support platform 1 in the second horizontal direction. The two clamps 21 in the first limiting member clamp the pressure beam 33 on opposite sides in the second horizontal direction.
[0045] The usage method of the workpiece fixing fixture is as follows:
[0046] 1. Ensure that support platform 1 is level;
[0047] 2. Ensure that the support table 1 is parallel to the track line on the milling machine on one side in the second horizontal direction;
[0048] 3. Examine the workpiece 100 drawing and classify the workpieces 100 with the same angle between the end plate 102 and the crossbeam 101, and determine the size of the angle between the end plate 102 and the crossbeam 101.
[0049] 4. Adjust the two clamps 21, the fixing parts and the gantry in the first limiting component 2 according to the angle between the end plate 102 and the crossbeam 101;
[0050] 5. Draw angle lines on support platform 1;
[0051] 6. Fine-tune one of the chucks 21 in the first limiting component 2 by using the drive screw 231 on the fixed base 22, so that the chuck 21 is flush with the angle line;
[0052] 7. Remove the pressure beam 33 from the second support screw 32, place the workpiece 100 to be fixed between the pressure beam 33 and the support platform, and then fasten the pressure beam 33 into the second support screw 32.
[0053] 8. Rotate the drive rod to drive another chuck 21 in the first limiting component 2 to move toward the workpiece 100, so that the chuck 21 presses against the workpiece 100;
[0054] 9. Use an angle gauge to measure whether the placement of workpiece 100 on the support platform meets the requirements. If there is an error, make fine adjustments to the two clamps 21 in the first limit component 2.
[0055] 10. Drive the first support screw 31 and the second support screw 32 to rotate, so that the pressure beam 33 presses the workpiece 100, thereby fixing the workpiece 100 on the support table 1.
[0056] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings, and are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.
[0057] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.
[0058] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
[0059] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of the invention and should not be construed as limiting the scope of protection of the invention in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of the invention without inventive effort, and these embodiments will all fall within the scope of protection of the present invention.
Claims
1. A workpiece fixing fixture for a milling machine, characterized in that... The device includes a support platform for supporting a workpiece and a fixing mechanism disposed on the support platform. The fixing mechanism includes at least two sets of limiting components, which are spaced apart along a first horizontal direction. Each set of limiting components includes a first limiting component and a second limiting component. The first limiting component includes two clamps spaced apart along a second horizontal direction. The two clamps are movable in the second horizontal direction to selectively abut against the workpiece on opposite sides in the second horizontal direction. The second horizontal direction is set at an angle to the first horizontal direction. The second limiting component includes a liftable pressure beam and a first support screw and a second support screw spaced apart in the second horizontal direction. One end of the first support screw and one end of the second support screw are both tightened onto the support platform. The other ends of the first support screw and the second support screw are both located on the upper surface of the support platform. One end of the pressure beam is rotatably connected to the first support screw, and the other end is provided with a snap-fit hole. A latch is provided on one side of the snap-fit hole. The second support screw is snapped into the snap-fit hole through the latch. The pressure beam is used to abut against the upper side of the workpiece. The angle at which the workpiece is placed on the support platform can be adjusted by finely adjusting the position of the chuck.
2. The workpiece fixing fixture for a milling machine according to claim 1, characterized in that, The first limiting component further includes two driving members, each corresponding to one of the chucks. The driving members are connected to the chucks and are used to drive the chucks to move in the second horizontal direction so that the chucks move away from or closer to the workpiece.
3. The workpiece fixing fixture for a milling machine according to claim 2, characterized in that, The driving component includes a fixed base and a driving screw. The fixed base is located on the side of the chuck away from the workpiece and is disposed on the upper surface of the support platform. The fixed base is provided with a threaded hole that mates with the driving screw. The chuck includes a clamping plate and a limiting plate. The clamping plate and the limiting plate are spaced apart along the second horizontal direction, forming a limiting channel between them. The clamping plate is disposed close to the workpiece for contact with it, while the limiting plate is disposed away from the workpiece. The clamping plate and the limiting plate are connected by a connecting plate. The limiting plate is provided with a through hole. One end of the driving screw passes through the threaded hole and the through hole in sequence and extends into the limiting channel. A driving plate is connected to one end of the driving screw located in the limiting channel. The driving plate is movably disposed in the limiting channel. The end of the driving screw away from the driving plate protrudes from the fixed base, forming an operating part.
4. The workpiece fixing fixture for a milling machine according to claim 3, characterized in that, The clamp includes two connecting plates, which are disposed on opposite sides of the limiting plate.
5. The workpiece fixing fixture for a milling machine according to claim 3, characterized in that, An operating handle is connected to the operating unit.
6. The workpiece fixing fixture for a milling machine according to claim 5, characterized in that, The operating handle is provided with a connecting block, which is detachably connected to the operating part through a threaded structure.
7. The workpiece fixing fixture for a milling machine according to claim 3, characterized in that, The fixing base is detachably connected to the support platform by fasteners. The bottom of the fixing base is provided with a first fastening hole, and the support platform is provided with a second fastening hole. The fastener passes through the fastening hole and is tightened in the second fastening hole.
8. The workpiece fixing fixture for a milling machine according to claim 7, characterized in that, The support platform is provided with a plurality of second fastening holes in the second horizontal direction, and the plurality of second fastening holes are distributed at intervals in the second horizontal direction.
9. The workpiece fixing fixture for a milling machine according to claim 1, characterized in that, A fixing nut is fixed on the support platform. The first support screw and the second support screw are each corresponding to the fixing nut. The lower end of the first support screw passes through the support platform and is tightened in the corresponding fixing nut. The lower end of the second support screw passes through the support platform and is tightened in the corresponding fixing nut.
10. The workpiece fixing fixture for a milling machine according to any one of claims 1-9, characterized in that, It includes at least two of the fixing mechanisms, which are spaced apart along the second horizontal direction.